modules/gles31/functional/es31fTessellationTests.cpp

   1 /*-------------------------------------------------------------------------
   2  * drawElements Quality Program OpenGL ES 3.1 Module
   3  * -------------------------------------------------
   4  *
   5  * Copyright 2014 The Android Open Source Project
   6  *
   7  * Licensed under the Apache License, Version 2.0 (the "License");
   8  * you may not use this file except in compliance with the License.
   9  * You may obtain a copy of the License at
  10  *
  11  *      http://www.apache.org/licenses/LICENSE-2.0
  12  *
  13  * Unless required by applicable law or agreed to in writing, software
  14  * distributed under the License is distributed on an "AS IS" BASIS,
  15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16  * See the License for the specific language governing permissions and
  17  * limitations under the License.
  18  *
  19  *//*!
  20  * \file
  21  * \brief Tessellation Tests.
  22  *//*--------------------------------------------------------------------*/
  23
  24 #include "es31fTessellationTests.hpp"
  25 #include "glsTextureTestUtil.hpp"
  26 #include "glsShaderLibrary.hpp"
  27 #include "glsStateQueryUtil.hpp"
  28 #include "gluShaderProgram.hpp"
  29 #include "gluRenderContext.hpp"
  30 #include "gluPixelTransfer.hpp"
  31 #include "gluDrawUtil.hpp"
  32 #include "gluObjectWrapper.hpp"
  33 #include "gluStrUtil.hpp"
  34 #include "gluContextInfo.hpp"
  35 #include "gluVarType.hpp"
  36 #include "gluVarTypeUtil.hpp"
  37 #include "gluCallLogWrapper.hpp"
  38 #include "tcuTestLog.hpp"
  39 #include "tcuRenderTarget.hpp"
  40 #include "tcuStringTemplate.hpp"
  41 #include "tcuSurface.hpp"
  42 #include "tcuTextureUtil.hpp"
  43 #include "tcuVectorUtil.hpp"
  44 #include "tcuImageIO.hpp"
  45 #include "tcuResource.hpp"
  46 #include "tcuImageCompare.hpp"
  47 #include "deRandom.hpp"
  48 #include "deStringUtil.hpp"
  49 #include "deSharedPtr.hpp"
  50 #include "deUniquePtr.hpp"
  51 #include "deString.h"
  52 #include "deMath.h"
  53
  54 #include "glwEnums.hpp"
  55 #include "glwDefs.hpp"
  56 #include "glwFunctions.hpp"
  57
  58 #include <vector>
  59 #include <string>
  60 #include <algorithm>
  61 #include <functional>
  62 #include <set>
  63 #include <limits>
  64
  65 using glu::ShaderProgram;
  66 using glu::RenderContext;
  67 using tcu::RenderTarget;
  68 using tcu::TestLog;
  69 using tcu::Vec2;
  70 using tcu::Vec3;
  71 using tcu::Vec4;
  72 using de::Random;
  73 using de::SharedPtr;
  74
  75 using std::vector;
  76 using std::string;
  77
  78 using namespace glw; // For GL types.
  79
  80 namespace deqp
  81 {
  82
  83 using gls::TextureTestUtil::RandomViewport;
  84
  85 namespace gles31
  86 {
  87 namespace Functional
  88 {
  89
  90 using namespace gls::StateQueryUtil;
  91
  92 enum
  93 {
  94         MINIMUM_MAX_TESS_GEN_LEVEL = 64 //!< GL-defined minimum for GL_MAX_TESS_GEN_LEVEL.
  95 };
  96
  97 static inline bool vec3XLessThan (const Vec3& a, const Vec3& b) { return a.x() < b.x(); }
  98
  99 template <typename IterT>
 100 static string elemsStr (const IterT& begin, const IterT& end, int wrapLengthParam = 0, int numIndentationSpaces = 0)
 101 {
 102         const string    baseIndentation = string(numIndentationSpaces, ' ');
 103         const string    deepIndentation = baseIndentation + string(4, ' ');
 104         const int               wrapLength              = wrapLengthParam > 0 ? wrapLengthParam : std::numeric_limits<int>::max();
 105         const int               length                  = (int)std::distance(begin, end);
 106         string                  result;
 107
 108         if (length > wrapLength)
 109                 result += "(amount: " + de::toString(length) + ") ";
 110         result += string() + "{" + (length > wrapLength ? "\n"+deepIndentation : " ");
 111
 112         {
 113                 int index = 0;
 114                 for (IterT it = begin; it != end; ++it)
 115                 {
 116                         if (it != begin)
 117                                 result += string() + ", " + (index % wrapLength == 0 ? "\n"+deepIndentation : "");
 118                         result += de::toString(*it);
 119                         index++;
 120                 }
 121
 122                 result += length > wrapLength ? "\n"+baseIndentation : " ";
 123         }
 124
 125         result += "}";
 126         return result;
 127 }
 128
 129 template <typename ContainerT>
 130 static string containerStr (const ContainerT& c, int wrapLengthParam = 0, int numIndentationSpaces = 0)
 131 {
 132         return elemsStr(c.begin(), c.end(), wrapLengthParam, numIndentationSpaces);
 133 }
 134
 135 template <typename T, int N>
 136 static string arrayStr (const T (&arr)[N], int wrapLengthParam = 0, int numIndentationSpaces = 0)
 137 {
 138         return elemsStr(DE_ARRAY_BEGIN(arr), DE_ARRAY_END(arr), wrapLengthParam, numIndentationSpaces);
 139 }
 140
 141 template <typename T, int N>
 142 static T arrayMax (const T (&arr)[N])
 143 {
 144         return *std::max_element(DE_ARRAY_BEGIN(arr), DE_ARRAY_END(arr));
 145 }
 146
 147 template <typename T, typename MembT>
 148 static vector<MembT> members (const vector<T>& objs, MembT T::* membP)
 149 {
 150         vector<MembT> result(objs.size());
 151         for (int i = 0; i < (int)objs.size(); i++)
 152                 result[i] = objs[i].*membP;
 153         return result;
 154 }
 155
 156 template <typename T, int N>
 157 static vector<T> arrayToVector (const T (&arr)[N])
 158 {
 159         return vector<T>(DE_ARRAY_BEGIN(arr), DE_ARRAY_END(arr));
 160 }
 161
 162 template <typename ContainerT, typename T>
 163 static inline bool contains (const ContainerT& c, const T& key)
 164 {
 165         return c.find(key) != c.end();
 166 }
 167
 168 template <int Size>
 169 static inline tcu::Vector<bool, Size> singleTrueMask (int index)
 170 {
 171         DE_ASSERT(de::inBounds(index, 0, Size));
 172         tcu::Vector<bool, Size> result;
 173         result[index] = true;
 174         return result;
 175 }
 176
 177 static int intPow (int base, int exp)
 178 {
 179         DE_ASSERT(exp >= 0);
 180         if (exp == 0)
 181                 return 1;
 182         else
 183         {
 184                 const int sub = intPow(base, exp/2);
 185                 if (exp % 2 == 0)
 186                         return sub*sub;
 187                 else
 188                         return sub*sub*base;
 189         }
 190 }
 191
 192 tcu::Surface getPixels (const glu::RenderContext& rCtx, int x, int y, int width, int height)
 193 {
 194         tcu::Surface result(width, height);
 195         glu::readPixels(rCtx, x, y, result.getAccess());
 196         return result;
 197 }
 198
 199 tcu::Surface getPixels (const glu::RenderContext& rCtx, const RandomViewport& vp)
 200 {
 201         return getPixels(rCtx, vp.x, vp.y, vp.width, vp.height);
 202 }
 203
 204 static inline void checkRenderTargetSize (const RenderTarget& renderTarget, int minSize)
 205 {
 206         if (renderTarget.getWidth() < minSize || renderTarget.getHeight() < minSize)
 207                 throw tcu::NotSupportedError("Render target width and height must be at least " + de::toString(minSize));
 208 }
 209
 210 tcu::TextureLevel getPNG (const tcu::Archive& archive, const string& filename)
 211 {
 212         tcu::TextureLevel result;
 213         tcu::ImageIO::loadPNG(result, archive, filename.c_str());
 214         return result;
 215 }
 216
 217 static int numBasicSubobjects (const glu::VarType& type)
 218 {
 219         if (type.isBasicType())
 220                 return 1;
 221         else if (type.isArrayType())
 222                 return type.getArraySize()*numBasicSubobjects(type.getElementType());
 223         else if (type.isStructType())
 224         {
 225                 const glu::StructType&  structType      = *type.getStructPtr();
 226                 int                                             result          = 0;
 227                 for (int i = 0; i < structType.getNumMembers(); i++)
 228                         result += numBasicSubobjects(structType.getMember(i).getType());
 229                 return result;
 230         }
 231         else
 232         {
 233                 DE_ASSERT(false);
 234                 return -1;
 235         }
 236 }
 237
 238 static inline int numVerticesPerPrimitive (deUint32 primitiveTypeGL)
 239 {
 240         switch (primitiveTypeGL)
 241         {
 242                 case GL_POINTS:         return 1;
 243                 case GL_TRIANGLES:      return 3;
 244                 case GL_LINES:          return 2;
 245                 default:
 246                         DE_ASSERT(false);
 247                         return -1;
 248         }
 249 }
 250
 251 static inline void setViewport (const glw::Functions& gl, const RandomViewport& vp)
 252 {
 253         gl.viewport(vp.x, vp.y, vp.width, vp.height);
 254 }
 255
 256 static inline deUint32 getQueryResult (const glw::Functions& gl, deUint32 queryObject)
 257 {
 258         deUint32 result = (deUint32)-1;
 259         gl.getQueryObjectuiv(queryObject, GL_QUERY_RESULT, &result);
 260         TCU_CHECK(result != (deUint32)-1);
 261         return result;
 262 }
 263
 264 template <typename T>
 265 static void readDataMapped (const glw::Functions& gl, deUint32 bufferTarget, int numElems, T* dst)
 266 {
 267         const int                                                       numBytes        = numElems*(int)sizeof(T);
 268         const T* const                                          mappedData      = (const T*)gl.mapBufferRange(bufferTarget, 0, numBytes, GL_MAP_READ_BIT);
 269         GLU_EXPECT_NO_ERROR(gl.getError(), (string() + "glMapBufferRange(" + glu::getBufferTargetName((int)bufferTarget) + ", 0, " + de::toString(numBytes) + ", GL_MAP_READ_BIT)").c_str());
 270         TCU_CHECK(mappedData != DE_NULL);
 271
 272         for (int i = 0; i < numElems; i++)
 273                 dst[i] = mappedData[i];
 274
 275         gl.unmapBuffer(bufferTarget);
 276 }
 277
 278 template <typename T>
 279 static vector<T> readDataMapped (const glw::Functions& gl, deUint32 bufferTarget, int numElems)
 280 {
 281         vector<T> result(numElems);
 282         readDataMapped(gl, bufferTarget, numElems, &result[0]);
 283         return result;
 284 }
 285
 286 namespace
 287 {
 288
 289 template <typename ArgT, bool res>
 290 struct ConstantUnaryPredicate
 291 {
 292         bool operator() (const ArgT&) const { return res; }
 293 };
 294
 295 //! Helper for handling simple, one-varying transform feedbacks.
 296 template <typename VaryingT>
 297 class TransformFeedbackHandler
 298 {
 299 public:
 300         struct Result
 301         {
 302                 int                                     numPrimitives;
 303                 vector<VaryingT>        varying;
 304
 305                 Result (void)                                                           : numPrimitives(-1) {}
 306                 Result (int n, const vector<VaryingT>& v)       : numPrimitives(n), varying(v) {}
 307         };
 308
 309                                                                         TransformFeedbackHandler        (const glu::RenderContext& renderCtx, int maxNumVertices);
 310
 311         Result                                                  renderAndGetPrimitives          (deUint32 programGL, deUint32 tfPrimTypeGL, int numBindings, const glu::VertexArrayBinding* bindings, int numVertices) const;
 312
 313 private:
 314         const glu::RenderContext&               m_renderCtx;
 315         const glu::TransformFeedback    m_tf;
 316         const glu::Buffer                               m_tfBuffer;
 317         const glu::Query                                m_tfPrimQuery;
 318 };
 319
 320 template <typename AttribType>
 321 TransformFeedbackHandler<AttribType>::TransformFeedbackHandler (const glu::RenderContext& renderCtx, int maxNumVertices)
 322         : m_renderCtx           (renderCtx)
 323         , m_tf                          (renderCtx)
 324         , m_tfBuffer            (renderCtx)
 325         , m_tfPrimQuery         (renderCtx)
 326 {
 327         const glw::Functions&   gl                      = m_renderCtx.getFunctions();
 328         // \note Room for 1 extra triangle, to detect if GL returns too many primitives.
 329         const int                               bufferSize      = (maxNumVertices + 3) * (int)sizeof(AttribType);
 330
 331         gl.bindBuffer(GL_TRANSFORM_FEEDBACK_BUFFER, *m_tfBuffer);
 332         gl.bufferData(GL_TRANSFORM_FEEDBACK_BUFFER, bufferSize, DE_NULL, GL_DYNAMIC_READ);
 333 }
 334
 335 template <typename AttribType>
 336 typename TransformFeedbackHandler<AttribType>::Result TransformFeedbackHandler<AttribType>::renderAndGetPrimitives (deUint32 programGL, deUint32 tfPrimTypeGL, int numBindings, const glu::VertexArrayBinding* bindings, int numVertices) const
 337 {
 338         DE_ASSERT(tfPrimTypeGL == GL_POINTS || tfPrimTypeGL == GL_LINES || tfPrimTypeGL == GL_TRIANGLES);
 339
 340         const glw::Functions& gl = m_renderCtx.getFunctions();
 341
 342         gl.bindTransformFeedback(GL_TRANSFORM_FEEDBACK, *m_tf);
 343         gl.bindBuffer(GL_TRANSFORM_FEEDBACK_BUFFER, *m_tfBuffer);
 344         gl.bindBufferBase(GL_TRANSFORM_FEEDBACK_BUFFER, 0, *m_tfBuffer);
 345
 346         gl.beginQuery(GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN, *m_tfPrimQuery);
 347         gl.beginTransformFeedback(tfPrimTypeGL);
 348
 349         glu::draw(m_renderCtx, programGL, numBindings, bindings, glu::pr::Patches(numVertices));
 350         GLU_EXPECT_NO_ERROR(gl.getError(), "Draw failed");
 351
 352         gl.endTransformFeedback();
 353         gl.endQuery(GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN);
 354
 355         {
 356                 const int numPrimsWritten = (int)getQueryResult(gl, *m_tfPrimQuery);
 357                 return Result(numPrimsWritten, readDataMapped<AttribType>(gl, GL_TRANSFORM_FEEDBACK_BUFFER, numPrimsWritten * numVerticesPerPrimitive(tfPrimTypeGL)));
 358         }
 359 }
 360
 361 template <typename T>
 362 class SizeLessThan
 363 {
 364 public:
 365         bool operator() (const T& a, const T& b) const { return a.size() < b.size(); }
 366 };
 367
 368 //! Predicate functor for comparing structs by their members.
 369 template <typename Pred, typename T, typename MembT>
 370 class MemberPred
 371 {
 372 public:
 373                                 MemberPred      (MembT T::* membP) : m_membP(membP), m_pred(Pred()) {}
 374         bool            operator()      (const T& a, const T& b) const { return m_pred(a.*m_membP, b.*m_membP); }
 375
 376 private:
 377         MembT T::*      m_membP;
 378         Pred            m_pred;
 379 };
 380
 381 //! Convenience wrapper for MemberPred, because class template arguments aren't deduced based on constructor arguments.
 382 template <template <typename> class Pred, typename T, typename MembT>
 383 static MemberPred<Pred<MembT>, T, MembT> memberPred (MembT T::* membP) { return MemberPred<Pred<MembT>, T, MembT>(membP); }
 384
 385 template <typename SeqT, int Size, typename Pred>
 386 class LexCompare
 387 {
 388 public:
 389         LexCompare (void) : m_pred(Pred()) {}
 390
 391         bool operator() (const SeqT& a, const SeqT& b) const
 392         {
 393                 for (int i = 0; i < Size; i++)
 394                 {
 395                         if (m_pred(a[i], b[i]))
 396                                 return true;
 397                         if (m_pred(b[i], a[i]))
 398                                 return false;
 399                 }
 400                 return false;
 401         }
 402
 403 private:
 404         Pred m_pred;
 405 };
 406
 407 template <int Size>
 408 class VecLexLessThan : public LexCompare<tcu::Vector<float, Size>, Size, std::less<float> >
 409 {
 410 };
 411
 412 enum TessPrimitiveType
 413 {
 414         TESSPRIMITIVETYPE_TRIANGLES = 0,
 415         TESSPRIMITIVETYPE_QUADS,
 416         TESSPRIMITIVETYPE_ISOLINES,
 417
 418         TESSPRIMITIVETYPE_LAST
 419 };
 420
 421 enum SpacingMode
 422 {
 423         SPACINGMODE_EQUAL,
 424         SPACINGMODE_FRACTIONAL_ODD,
 425         SPACINGMODE_FRACTIONAL_EVEN,
 426
 427         SPACINGMODE_LAST
 428 };
 429
 430 enum Winding
 431 {
 432         WINDING_CCW = 0,
 433         WINDING_CW,
 434
 435         WINDING_LAST
 436 };
 437
 438 static inline const char* getTessPrimitiveTypeShaderName (TessPrimitiveType type)
 439 {
 440         switch (type)
 441         {
 442                 case TESSPRIMITIVETYPE_TRIANGLES:       return "triangles";
 443                 case TESSPRIMITIVETYPE_QUADS:           return "quads";
 444                 case TESSPRIMITIVETYPE_ISOLINES:        return "isolines";
 445                 default:
 446                         DE_ASSERT(false);
 447                         return DE_NULL;
 448         }
 449 }
 450
 451 static inline const char* getSpacingModeShaderName (SpacingMode mode)
 452 {
 453         switch (mode)
 454         {
 455                 case SPACINGMODE_EQUAL:                         return "equal_spacing";
 456                 case SPACINGMODE_FRACTIONAL_ODD:        return "fractional_odd_spacing";
 457                 case SPACINGMODE_FRACTIONAL_EVEN:       return "fractional_even_spacing";
 458                 default:
 459                         DE_ASSERT(false);
 460                         return DE_NULL;
 461         }
 462 }
 463
 464 static inline const char* getWindingShaderName (Winding winding)
 465 {
 466         switch (winding)
 467         {
 468                 case WINDING_CCW:       return "ccw";
 469                 case WINDING_CW:        return "cw";
 470                 default:
 471                         DE_ASSERT(false);
 472                         return DE_NULL;
 473         }
 474 }
 475
 476 static inline string getTessellationEvaluationInLayoutString (TessPrimitiveType primType, SpacingMode spacing, Winding winding, bool usePointMode=false)
 477 {
 478         return string() + "layout (" + getTessPrimitiveTypeShaderName(primType)
 479                                                                  + ", " + getSpacingModeShaderName(spacing)
 480                                                                  + ", " + getWindingShaderName(winding)
 481                                                                  + (usePointMode ? ", point_mode" : "")
 482                                                                  + ") in;\n";
 483 }
 484
 485 static inline string getTessellationEvaluationInLayoutString (TessPrimitiveType primType, SpacingMode spacing, bool usePointMode=false)
 486 {
 487         return string() + "layout (" + getTessPrimitiveTypeShaderName(primType)
 488                                                                  + ", " + getSpacingModeShaderName(spacing)
 489                                                                  + (usePointMode ? ", point_mode" : "")
 490                                                                  + ") in;\n";
 491 }
 492
 493 static inline string getTessellationEvaluationInLayoutString (TessPrimitiveType primType, Winding winding, bool usePointMode=false)
 494 {
 495         return string() + "layout (" + getTessPrimitiveTypeShaderName(primType)
 496                                                                  + ", " + getWindingShaderName(winding)
 497                                                                  + (usePointMode ? ", point_mode" : "")
 498                                                                  + ") in;\n";
 499 }
 500
 501 static inline string getTessellationEvaluationInLayoutString (TessPrimitiveType primType, bool usePointMode=false)
 502 {
 503         return string() + "layout (" + getTessPrimitiveTypeShaderName(primType)
 504                                                                  + (usePointMode ? ", point_mode" : "")
 505                                                                  + ") in;\n";
 506 }
 507
 508 static inline deUint32 outputPrimitiveTypeGL (TessPrimitiveType tessPrimType, bool usePointMode)
 509 {
 510         if (usePointMode)
 511                 return GL_POINTS;
 512         else
 513         {
 514                 switch (tessPrimType)
 515                 {
 516                         case TESSPRIMITIVETYPE_TRIANGLES:       return GL_TRIANGLES;
 517                         case TESSPRIMITIVETYPE_QUADS:           return GL_TRIANGLES;
 518                         case TESSPRIMITIVETYPE_ISOLINES:        return GL_LINES;
 519                         default:
 520                                 DE_ASSERT(false);
 521                                 return (deUint32)-1;
 522                 }
 523         }
 524 }
 525
 526 static inline int numInnerTessellationLevels (TessPrimitiveType primType)
 527 {
 528         switch (primType)
 529         {
 530                 case TESSPRIMITIVETYPE_TRIANGLES:       return 1;
 531                 case TESSPRIMITIVETYPE_QUADS:           return 2;
 532                 case TESSPRIMITIVETYPE_ISOLINES:        return 0;
 533                 default: DE_ASSERT(false); return -1;
 534         }
 535 }
 536
 537 static inline int numOuterTessellationLevels (TessPrimitiveType primType)
 538 {
 539         switch (primType)
 540         {
 541                 case TESSPRIMITIVETYPE_TRIANGLES:       return 3;
 542                 case TESSPRIMITIVETYPE_QUADS:           return 4;
 543                 case TESSPRIMITIVETYPE_ISOLINES:        return 2;
 544                 default: DE_ASSERT(false); return -1;
 545         }
 546 }
 547
 548 static string tessellationLevelsString (const float* inner, int numInner, const float* outer, int numOuter)
 549 {
 550         DE_ASSERT(numInner >= 0 && numOuter >= 0);
 551         return "inner: " + elemsStr(inner, inner+numInner) + ", outer: " + elemsStr(outer, outer+numOuter);
 552 }
 553
 554 static string tessellationLevelsString (const float* inner, const float* outer, TessPrimitiveType primType)
 555 {
 556         return tessellationLevelsString(inner, numInnerTessellationLevels(primType), outer, numOuterTessellationLevels(primType));
 557 }
 558
 559 static string tessellationLevelsString (const float* inner, const float* outer)
 560 {
 561         return tessellationLevelsString(inner, 2, outer, 4);
 562 }
 563
 564 static inline float getClampedTessLevel (SpacingMode mode, float tessLevel)
 565 {
 566         switch (mode)
 567         {
 568                 case SPACINGMODE_EQUAL:                         return de::max(1.0f, tessLevel);
 569                 case SPACINGMODE_FRACTIONAL_ODD:        return de::max(1.0f, tessLevel);
 570                 case SPACINGMODE_FRACTIONAL_EVEN:       return de::max(2.0f, tessLevel);
 571                 default:
 572                         DE_ASSERT(false);
 573                         return -1.0f;
 574         }
 575 }
 576
 577 static inline int getRoundedTessLevel (SpacingMode mode, float clampedTessLevel)
 578 {
 579         int result = (int)deFloatCeil(clampedTessLevel);
 580
 581         switch (mode)
 582         {
 583                 case SPACINGMODE_EQUAL:                                                                                 break;
 584                 case SPACINGMODE_FRACTIONAL_ODD:        result += 1 - result % 2;       break;
 585                 case SPACINGMODE_FRACTIONAL_EVEN:       result += result % 2;           break;
 586                 default:
 587                         DE_ASSERT(false);
 588         }
 589         DE_ASSERT(de::inRange<int>(result, 1, MINIMUM_MAX_TESS_GEN_LEVEL));
 590
 591         return result;
 592 }
 593
 594 static int getClampedRoundedTessLevel (SpacingMode mode, float tessLevel)
 595 {
 596         return getRoundedTessLevel(mode, getClampedTessLevel(mode, tessLevel));
 597 }
 598
 599 //! A description of an outer edge of a triangle, quad or isolines.
 600 //! An outer edge can be described by the index of a u/v/w coordinate
 601 //! and the coordinate's value along that edge.
 602 struct OuterEdgeDescription
 603 {
 604         int             constantCoordinateIndex;
 605         float   constantCoordinateValueChoices[2];
 606         int             numConstantCoordinateValueChoices;
 607
 608         OuterEdgeDescription (int i, float c0)                  : constantCoordinateIndex(i), numConstantCoordinateValueChoices(1) { constantCoordinateValueChoices[0] = c0; }
 609         OuterEdgeDescription (int i, float c0, float c1)        : constantCoordinateIndex(i), numConstantCoordinateValueChoices(2) { constantCoordinateValueChoices[0] = c0; constantCoordinateValueChoices[1] = c1; }
 610
 611         string description (void) const
 612         {
 613                 static const char* const        coordinateNames[] = { "u", "v", "w" };
 614                 string                                          result;
 615                 for (int i = 0; i < numConstantCoordinateValueChoices; i++)
 616                         result += string() + (i > 0 ? " or " : "") + coordinateNames[constantCoordinateIndex] + "=" + de::toString(constantCoordinateValueChoices[i]);
 617                 return result;
 618         }
 619
 620         bool contains (const Vec3& v) const
 621         {
 622                 for (int i = 0; i < numConstantCoordinateValueChoices; i++)
 623                         if (v[constantCoordinateIndex] == constantCoordinateValueChoices[i])
 624                                 return true;
 625                 return false;
 626         }
 627 };
 628
 629 static vector<OuterEdgeDescription> outerEdgeDescriptions (TessPrimitiveType primType)
 630 {
 631         static const OuterEdgeDescription triangleOuterEdgeDescriptions[3] =
 632         {
 633                 OuterEdgeDescription(0, 0.0f),
 634                 OuterEdgeDescription(1, 0.0f),
 635                 OuterEdgeDescription(2, 0.0f)
 636         };
 637
 638         static const OuterEdgeDescription quadOuterEdgeDescriptions[4] =
 639         {
 640                 OuterEdgeDescription(0, 0.0f),
 641                 OuterEdgeDescription(1, 0.0f),
 642                 OuterEdgeDescription(0, 1.0f),
 643                 OuterEdgeDescription(1, 1.0f)
 644         };
 645
 646         static const OuterEdgeDescription isolinesOuterEdgeDescriptions[1] =
 647         {
 648                 OuterEdgeDescription(0, 0.0f, 1.0f),
 649         };
 650
 651         switch (primType)
 652         {
 653                 case TESSPRIMITIVETYPE_TRIANGLES:       return arrayToVector(triangleOuterEdgeDescriptions);
 654                 case TESSPRIMITIVETYPE_QUADS:           return arrayToVector(quadOuterEdgeDescriptions);
 655                 case TESSPRIMITIVETYPE_ISOLINES:        return arrayToVector(isolinesOuterEdgeDescriptions);
 656                 default: DE_ASSERT(false); return vector<OuterEdgeDescription>();
 657         }
 658 }
 659
 660 // \note The tessellation coordinates generated by this function could break some of the rules given in the spec (e.g. it may not exactly hold that u+v+w == 1.0f, or [uvw] + (1.0f-[uvw]) == 1.0f).
 661 static vector<Vec3> generateReferenceTriangleTessCoords (SpacingMode spacingMode, int inner, int outer0, int outer1, int outer2)
 662 {
 663         vector<Vec3> tessCoords;
 664
 665         if (inner == 1)
 666         {
 667                 if (outer0 == 1 && outer1 == 1 && outer2 == 1)
 668                 {
 669                         tessCoords.push_back(Vec3(1.0f, 0.0f, 0.0f));
 670                         tessCoords.push_back(Vec3(0.0f, 1.0f, 0.0f));
 671                         tessCoords.push_back(Vec3(0.0f, 0.0f, 1.0f));
 672                         return tessCoords;
 673                 }
 674                 else
 675                         return generateReferenceTriangleTessCoords(spacingMode, spacingMode == SPACINGMODE_FRACTIONAL_ODD ? 3 : 2,
 676                                                                                                                                         outer0, outer1, outer2);
 677         }
 678         else
 679         {
 680                 for (int i = 0; i < outer0; i++) { const float v = (float)i / (float)outer0; tessCoords.push_back(Vec3(    0.0f,                   v,   1.0f - v)); }
 681                 for (int i = 0; i < outer1; i++) { const float v = (float)i / (float)outer1; tessCoords.push_back(Vec3(1.0f - v,                0.0f,              v)); }
 682                 for (int i = 0; i < outer2; i++) { const float v = (float)i / (float)outer2; tessCoords.push_back(Vec3(           v,    1.0f - v,               0.0f)); }
 683
 684                 const int numInnerTriangles = inner/2;
 685                 for (int innerTriangleNdx = 0; innerTriangleNdx < numInnerTriangles; innerTriangleNdx++)
 686                 {
 687                         const int curInnerTriangleLevel = inner - 2*(innerTriangleNdx+1);
 688
 689                         if (curInnerTriangleLevel == 0)
 690                                 tessCoords.push_back(Vec3(1.0f/3.0f));
 691                         else
 692                         {
 693                                 const float             minUVW          = (float)(2 * (innerTriangleNdx + 1)) / (float)(3 * inner);
 694                                 const float             maxUVW          = 1.0f - 2.0f*minUVW;
 695                                 const Vec3              corners[3]      =
 696                                 {
 697                                         Vec3(maxUVW, minUVW, minUVW),
 698                                         Vec3(minUVW, maxUVW, minUVW),
 699                                         Vec3(minUVW, minUVW, maxUVW)
 700                                 };
 701
 702                                 for (int i = 0; i < curInnerTriangleLevel; i++)
 703                                 {
 704                                         const float f = (float)i / (float)curInnerTriangleLevel;
 705                                         for (int j = 0; j < 3; j++)
 706                                                 tessCoords.push_back((1.0f - f)*corners[j] + f*corners[(j+1)%3]);
 707                                 }
 708                         }
 709                 }
 710
 711                 return tessCoords;
 712         }
 713 }
 714
 715 static int referenceTriangleNonPointModePrimitiveCount (SpacingMode spacingMode, int inner, int outer0, int outer1, int outer2)
 716 {
 717         if (inner == 1)
 718         {
 719                 if (outer0 == 1 && outer1 == 1 && outer2 == 1)
 720                         return 1;
 721                 else
 722                         return referenceTriangleNonPointModePrimitiveCount(spacingMode, spacingMode == SPACINGMODE_FRACTIONAL_ODD ? 3 : 2,
 723                                                                                                                                                         outer0, outer1, outer2);
 724         }
 725         else
 726         {
 727                 int result = outer0 + outer1 + outer2;
 728
 729                 const int numInnerTriangles = inner/2;
 730                 for (int innerTriangleNdx = 0; innerTriangleNdx < numInnerTriangles; innerTriangleNdx++)
 731                 {
 732                         const int curInnerTriangleLevel = inner - 2*(innerTriangleNdx+1);
 733
 734                         if (curInnerTriangleLevel == 1)
 735                                 result += 4;
 736                         else
 737                                 result += 2*3*curInnerTriangleLevel;
 738                 }
 739
 740                 return result;
 741         }
 742 }
 743
 744 // \note The tessellation coordinates generated by this function could break some of the rules given in the spec (e.g. it may not exactly hold that [uv] + (1.0f-[uv]) == 1.0f).
 745 static vector<Vec3> generateReferenceQuadTessCoords (SpacingMode spacingMode, int inner0, int inner1, int outer0, int outer1, int outer2, int outer3)
 746 {
 747         vector<Vec3> tessCoords;
 748
 749         if (inner0 == 1 || inner1 == 1)
 750         {
 751                 if (inner0 == 1 && inner1 == 1 && outer0 == 1 && outer1 == 1 && outer2 == 1 && outer3 == 1)
 752                 {
 753                         tessCoords.push_back(Vec3(0.0f, 0.0f, 0.0f));
 754                         tessCoords.push_back(Vec3(1.0f, 0.0f, 0.0f));
 755                         tessCoords.push_back(Vec3(0.0f, 1.0f, 0.0f));
 756                         tessCoords.push_back(Vec3(1.0f, 1.0f, 0.0f));
 757                         return tessCoords;
 758                 }
 759                 else
 760                         return generateReferenceQuadTessCoords(spacingMode, inner0 > 1 ? inner0 : spacingMode == SPACINGMODE_FRACTIONAL_ODD ? 3 : 2,
 761                                                                                                                                 inner1 > 1 ? inner1 : spacingMode == SPACINGMODE_FRACTIONAL_ODD ? 3 : 2,
 762                                                                                                                                 outer0, outer1, outer2, outer3);
 763         }
 764         else
 765         {
 766                 for (int i = 0; i < outer0; i++) { const float v = (float)i / (float)outer0; tessCoords.push_back(Vec3(0.0f,    v,                      0.0f)); }
 767                 for (int i = 0; i < outer1; i++) { const float v = (float)i / (float)outer1; tessCoords.push_back(Vec3(1.0f-v,  0.0f,           0.0f)); }
 768                 for (int i = 0; i < outer2; i++) { const float v = (float)i / (float)outer2; tessCoords.push_back(Vec3(1.0f,    1.0f-v,         0.0f)); }
 769                 for (int i = 0; i < outer3; i++) { const float v = (float)i / (float)outer3; tessCoords.push_back(Vec3(v,               1.0f,           0.0f)); }
 770
 771                 for (int innerVtxY = 0; innerVtxY < inner1-1; innerVtxY++)
 772                 for (int innerVtxX = 0; innerVtxX < inner0-1; innerVtxX++)
 773                         tessCoords.push_back(Vec3((float)(innerVtxX + 1) / (float)inner0,
 774                                                                           (float)(innerVtxY + 1) / (float)inner1,
 775                                                                           0.0f));
 776
 777                 return tessCoords;
 778         }
 779 }
 780
 781 static int referenceQuadNonPointModePrimitiveCount (SpacingMode spacingMode, int inner0, int inner1, int outer0, int outer1, int outer2, int outer3)
 782 {
 783         vector<Vec3> tessCoords;
 784
 785         if (inner0 == 1 || inner1 == 1)
 786         {
 787                 if (inner0 == 1 && inner1 == 1 && outer0 == 1 && outer1 == 1 && outer2 == 1 && outer3 == 1)
 788                         return 2;
 789                 else
 790                         return referenceQuadNonPointModePrimitiveCount(spacingMode, inner0 > 1 ? inner0 : spacingMode == SPACINGMODE_FRACTIONAL_ODD ? 3 : 2,
 791                                                                                                                                                 inner1 > 1 ? inner1 : spacingMode == SPACINGMODE_FRACTIONAL_ODD ? 3 : 2,
 792                                                                                                                                                 outer0, outer1, outer2, outer3);
 793         }
 794         else
 795                 return 2*(inner0-2)*(inner1-2) + 2*(inner0-2) + 2*(inner1-2) + outer0+outer1+outer2+outer3;
 796 }
 797
 798 // \note The tessellation coordinates generated by this function could break some of the rules given in the spec (e.g. it may not exactly hold that [uv] + (1.0f-[uv]) == 1.0f).
 799 static vector<Vec3> generateReferenceIsolineTessCoords (int outer0, int outer1)
 800 {
 801         vector<Vec3> tessCoords;
 802
 803         for (int y = 0; y < outer0;             y++)
 804         for (int x = 0; x < outer1+1;   x++)
 805                 tessCoords.push_back(Vec3((float)x / (float)outer1,
 806                                                                                                   (float)y / (float)outer0,
 807                                                                                                   0.0f));
 808
 809         return tessCoords;
 810 }
 811
 812 static int referenceIsolineNonPointModePrimitiveCount (int outer0, int outer1)
 813 {
 814         return outer0*outer1;
 815 }
 816
 817 static void getClampedRoundedTriangleTessLevels (SpacingMode spacingMode, const float* innerSrc, const float* outerSrc, int* innerDst, int *outerDst)
 818 {
 819         innerDst[0] = getClampedRoundedTessLevel(spacingMode, innerSrc[0]);
 820         for (int i = 0; i < 3; i++)
 821                 outerDst[i] = getClampedRoundedTessLevel(spacingMode, outerSrc[i]);
 822 }
 823
 824 static void getClampedRoundedQuadTessLevels (SpacingMode spacingMode, const float* innerSrc, const float* outerSrc, int* innerDst, int *outerDst)
 825 {
 826         for (int i = 0; i < 2; i++)
 827                 innerDst[i] = getClampedRoundedTessLevel(spacingMode, innerSrc[i]);
 828         for (int i = 0; i < 4; i++)
 829                 outerDst[i] = getClampedRoundedTessLevel(spacingMode, outerSrc[i]);
 830 }
 831
 832 static void getClampedRoundedIsolineTessLevels (SpacingMode spacingMode, const float* outerSrc, int* outerDst)
 833 {
 834         outerDst[0] = getClampedRoundedTessLevel(SPACINGMODE_EQUAL,     outerSrc[0]);
 835         outerDst[1] = getClampedRoundedTessLevel(spacingMode,           outerSrc[1]);
 836 }
 837
 838 static inline bool isPatchDiscarded (TessPrimitiveType primitiveType, const float* outerLevels)
 839 {
 840         const int numOuterLevels = numOuterTessellationLevels(primitiveType);
 841         for (int i = 0; i < numOuterLevels; i++)
 842                 if (outerLevels[i] <= 0.0f)
 843                         return true;
 844         return false;
 845 }
 846
 847 static vector<Vec3> generateReferenceTessCoords (TessPrimitiveType primitiveType, SpacingMode spacingMode, const float* innerLevels, const float* outerLevels)
 848 {
 849         if (isPatchDiscarded(primitiveType, outerLevels))
 850                 return vector<Vec3>();
 851
 852         switch (primitiveType)
 853         {
 854                 case TESSPRIMITIVETYPE_TRIANGLES:
 855                 {
 856                         int inner;
 857                         int outer[3];
 858                         getClampedRoundedTriangleTessLevels(spacingMode, innerLevels, outerLevels, &inner, &outer[0]);
 859
 860                         if (spacingMode != SPACINGMODE_EQUAL)
 861                         {
 862                                 // \note For fractional spacing modes, exact results are implementation-defined except in special cases.
 863                                 DE_ASSERT(de::abs(innerLevels[0] - (float)inner) < 0.001f);
 864                                 for (int i = 0; i < 3; i++)
 865                                         DE_ASSERT(de::abs(outerLevels[i] - (float)outer[i]) < 0.001f);
 866                                 DE_ASSERT(inner > 1 || (outer[0] == 1 && outer[1] == 1 && outer[2] == 1));
 867                         }
 868
 869                         return generateReferenceTriangleTessCoords(spacingMode, inner, outer[0], outer[1], outer[2]);
 870                 }
 871
 872                 case TESSPRIMITIVETYPE_QUADS:
 873                 {
 874                         int inner[2];
 875                         int outer[4];
 876                         getClampedRoundedQuadTessLevels(spacingMode, innerLevels, outerLevels, &inner[0], &outer[0]);
 877
 878                         if (spacingMode != SPACINGMODE_EQUAL)
 879                         {
 880                                 // \note For fractional spacing modes, exact results are implementation-defined except in special cases.
 881                                 for (int i = 0; i < 2; i++)
 882                                         DE_ASSERT(de::abs(innerLevels[i] - (float)inner[i]) < 0.001f);
 883                                 for (int i = 0; i < 4; i++)
 884                                         DE_ASSERT(de::abs(outerLevels[i] - (float)outer[i]) < 0.001f);
 885
 886                                 DE_ASSERT((inner[0] > 1 && inner[1] > 1) || (inner[0] == 1 && inner[1] == 1 && outer[0] == 1 && outer[1] == 1 && outer[2] == 1 && outer[3] == 1));
 887                         }
 888
 889                         return generateReferenceQuadTessCoords(spacingMode, inner[0], inner[1], outer[0], outer[1], outer[2], outer[3]);
 890                 }
 891
 892                 case TESSPRIMITIVETYPE_ISOLINES:
 893                 {
 894                         int outer[2];
 895                         getClampedRoundedIsolineTessLevels(spacingMode, &outerLevels[0], &outer[0]);
 896
 897                         if (spacingMode != SPACINGMODE_EQUAL)
 898                         {
 899                                 // \note For fractional spacing modes, exact results are implementation-defined except in special cases.
 900                                 DE_ASSERT(de::abs(outerLevels[1] - (float)outer[1]) < 0.001f);
 901                         }
 902
 903                         return generateReferenceIsolineTessCoords(outer[0], outer[1]);
 904                 }
 905
 906                 default:
 907                         DE_ASSERT(false);
 908                         return vector<Vec3>();
 909         }
 910 }
 911
 912 static int referencePointModePrimitiveCount (TessPrimitiveType primitiveType, SpacingMode spacingMode, const float* innerLevels, const float* outerLevels)
 913 {
 914         if (isPatchDiscarded(primitiveType, outerLevels))
 915                 return 0;
 916
 917         switch (primitiveType)
 918         {
 919                 case TESSPRIMITIVETYPE_TRIANGLES:
 920                 {
 921                         int inner;
 922                         int outer[3];
 923                         getClampedRoundedTriangleTessLevels(spacingMode, innerLevels, outerLevels, &inner, &outer[0]);
 924                         return (int)generateReferenceTriangleTessCoords(spacingMode, inner, outer[0], outer[1], outer[2]).size();
 925                 }
 926
 927                 case TESSPRIMITIVETYPE_QUADS:
 928                 {
 929                         int inner[2];
 930                         int outer[4];
 931                         getClampedRoundedQuadTessLevels(spacingMode, innerLevels, outerLevels, &inner[0], &outer[0]);
 932                         return (int)generateReferenceQuadTessCoords(spacingMode, inner[0], inner[1], outer[0], outer[1], outer[2], outer[3]).size();
 933                 }
 934
 935                 case TESSPRIMITIVETYPE_ISOLINES:
 936                 {
 937                         int outer[2];
 938                         getClampedRoundedIsolineTessLevels(spacingMode, &outerLevels[0], &outer[0]);
 939                         return (int)generateReferenceIsolineTessCoords(outer[0], outer[1]).size();
 940                 }
 941
 942                 default:
 943                         DE_ASSERT(false);
 944                         return -1;
 945         }
 946 }
 947
 948 static int referenceNonPointModePrimitiveCount (TessPrimitiveType primitiveType, SpacingMode spacingMode, const float* innerLevels, const float* outerLevels)
 949 {
 950         if (isPatchDiscarded(primitiveType, outerLevels))
 951                 return 0;
 952
 953         switch (primitiveType)
 954         {
 955                 case TESSPRIMITIVETYPE_TRIANGLES:
 956                 {
 957                         int inner;
 958                         int outer[3];
 959                         getClampedRoundedTriangleTessLevels(spacingMode, innerLevels, outerLevels, &inner, &outer[0]);
 960                         return referenceTriangleNonPointModePrimitiveCount(spacingMode, inner, outer[0], outer[1], outer[2]);
 961                 }
 962
 963                 case TESSPRIMITIVETYPE_QUADS:
 964                 {
 965                         int inner[2];
 966                         int outer[4];
 967                         getClampedRoundedQuadTessLevels(spacingMode, innerLevels, outerLevels, &inner[0], &outer[0]);
 968                         return referenceQuadNonPointModePrimitiveCount(spacingMode, inner[0], inner[1], outer[0], outer[1], outer[2], outer[3]);
 969                 }
 970
 971                 case TESSPRIMITIVETYPE_ISOLINES:
 972                 {
 973                         int outer[2];
 974                         getClampedRoundedIsolineTessLevels(spacingMode, &outerLevels[0], &outer[0]);
 975                         return referenceIsolineNonPointModePrimitiveCount(outer[0], outer[1]);
 976                 }
 977
 978                 default:
 979                         DE_ASSERT(false);
 980                         return -1;
 981         }
 982 }
 983
 984 static int referencePrimitiveCount (TessPrimitiveType primitiveType, SpacingMode spacingMode, bool usePointMode, const float* innerLevels, const float* outerLevels)
 985 {
 986         return usePointMode ? referencePointModePrimitiveCount          (primitiveType, spacingMode, innerLevels, outerLevels)
 987                                                 : referenceNonPointModePrimitiveCount   (primitiveType, spacingMode, innerLevels, outerLevels);
 988 }
 989
 990 static int referenceVertexCount (TessPrimitiveType primitiveType, SpacingMode spacingMode, bool usePointMode, const float* innerLevels, const float* outerLevels)
 991 {
 992         return referencePrimitiveCount(primitiveType, spacingMode, usePointMode, innerLevels, outerLevels)
 993                    * numVerticesPerPrimitive(outputPrimitiveTypeGL(primitiveType, usePointMode));
 994 }
 995
 996 //! Helper for calling referenceVertexCount multiple times with different tessellation levels.
 997 //! \note Levels contains inner and outer levels, per patch, in order IIOOOO. The full 6 levels must always be present, irrespective of primitiveType.
 998 static int multiplePatchReferenceVertexCount (TessPrimitiveType primitiveType, SpacingMode spacingMode, bool usePointMode, const float* levels, int numPatches)
 999 {
1000         int result = 0;
1001         for (int patchNdx = 0; patchNdx < numPatches; patchNdx++)
1002                 result += referenceVertexCount(primitiveType, spacingMode, usePointMode, &levels[6*patchNdx + 0], &levels[6*patchNdx + 2]);
1003         return result;
1004 }
1005
1006 vector<float> generateRandomPatchTessLevels (int numPatches, int constantOuterLevelIndex, float constantOuterLevel, de::Random& rnd)
1007 {
1008         vector<float> tessLevels(numPatches*6);
1009
1010         for (int patchNdx = 0; patchNdx < numPatches; patchNdx++)
1011         {
1012                 float* const inner = &tessLevels[patchNdx*6 + 0];
1013                 float* const outer = &tessLevels[patchNdx*6 + 2];
1014
1015                 for (int j = 0; j < 2; j++)
1016                         inner[j] = rnd.getFloat(1.0f, 62.0f);
1017                 for (int j = 0; j < 4; j++)
1018                         outer[j] = j == constantOuterLevelIndex ? constantOuterLevel : rnd.getFloat(1.0f, 62.0f);
1019         }
1020
1021         return tessLevels;
1022 }
1023
1024 static inline void drawPoint (tcu::Surface& dst, int centerX, int centerY, const tcu::RGBA& color, int size)
1025 {
1026         const int width         = dst.getWidth();
1027         const int height        = dst.getHeight();
1028         DE_ASSERT(de::inBounds(centerX, 0, width) && de::inBounds(centerY, 0, height));
1029         DE_ASSERT(size > 0);
1030
1031         for (int yOff = -((size-1)/2); yOff <= size/2; yOff++)
1032         for (int xOff = -((size-1)/2); xOff <= size/2; xOff++)
1033         {
1034                 const int pixX = centerX + xOff;
1035                 const int pixY = centerY + yOff;
1036                 if (de::inBounds(pixX, 0, width) && de::inBounds(pixY, 0, height))
1037                         dst.setPixel(pixX, pixY, color);
1038         }
1039 }
1040
1041 static void drawTessCoordPoint (tcu::Surface& dst, TessPrimitiveType primitiveType, const Vec3& pt, const tcu::RGBA& color, int size)
1042 {
1043         // \note These coordinates should match the description in the log message in TessCoordCase::iterate.
1044
1045         static const Vec2 triangleCorners[3] =
1046         {
1047                 Vec2(0.95f, 0.95f),
1048                 Vec2(0.5f,  0.95f - 0.9f*deFloatSqrt(3.0f/4.0f)),
1049                 Vec2(0.05f, 0.95f)
1050         };
1051
1052         static const float quadIsolineLDRU[4] =
1053         {
1054                 0.1f, 0.9f, 0.9f, 0.1f
1055         };
1056
1057         const Vec2 dstPos = primitiveType == TESSPRIMITIVETYPE_TRIANGLES ? pt.x()*triangleCorners[0]
1058                                                                                                                                          + pt.y()*triangleCorners[1]
1059                                                                                                                                          + pt.z()*triangleCorners[2]
1060
1061                                           : primitiveType == TESSPRIMITIVETYPE_QUADS ||
1062                                                 primitiveType == TESSPRIMITIVETYPE_ISOLINES ? Vec2((1.0f - pt.x())*quadIsolineLDRU[0] + pt.x()*quadIsolineLDRU[2],
1063                                                                                                                                                    (1.0f - pt.y())*quadIsolineLDRU[1] + pt.y()*quadIsolineLDRU[3])
1064
1065                                           : Vec2(-1.0f);
1066
1067         drawPoint(dst, (int)(dstPos.x() * (float)dst.getWidth()), (int)(dstPos.y() * (float)dst.getHeight()), color, size);
1068 }
1069
1070 static void drawTessCoordVisualization (tcu::Surface& dst, TessPrimitiveType primitiveType, const vector<Vec3>& coords)
1071 {
1072         const int               imageWidth              = 256;
1073         const int               imageHeight             = 256;
1074         dst.setSize(imageWidth, imageHeight);
1075
1076         tcu::clear(dst.getAccess(), tcu::Vec4(0.0f, 0.0f, 0.0f, 1.0f));
1077
1078         for (int i = 0; i < (int)coords.size(); i++)
1079                 drawTessCoordPoint(dst, primitiveType, coords[i], tcu::RGBA::white(), 2);
1080 }
1081
1082 static int binarySearchFirstVec3WithXAtLeast (const vector<Vec3>& sorted, float x)
1083 {
1084         const Vec3 ref(x, 0.0f, 0.0f);
1085         const vector<Vec3>::const_iterator first = std::lower_bound(sorted.begin(), sorted.end(), ref, vec3XLessThan);
1086         if (first == sorted.end())
1087                 return -1;
1088         return (int)std::distance(sorted.begin(), first);
1089 }
1090
1091 template <typename T, typename P>
1092 static vector<T> sorted (const vector<T>& unsorted, P pred)
1093 {
1094         vector<T> result = unsorted;
1095         std::sort(result.begin(), result.end(), pred);
1096         return result;
1097 }
1098
1099 template <typename T>
1100 static vector<T> sorted (const vector<T>& unsorted)
1101 {
1102         vector<T> result = unsorted;
1103         std::sort(result.begin(), result.end());
1104         return result;
1105 }
1106
1107 // Check that all points in subset are (approximately) present also in superset.
1108 static bool oneWayComparePointSets (TestLog&                            log,
1109                                                                         tcu::Surface&                   errorDst,
1110                                                                         TessPrimitiveType               primitiveType,
1111                                                                         const vector<Vec3>&             subset,
1112                                                                         const vector<Vec3>&             superset,
1113                                                                         const char*                             subsetName,
1114                                                                         const char*                             supersetName,
1115                                                                         const tcu::RGBA&                errorColor)
1116 {
1117         const vector<Vec3>      supersetSorted                  = sorted(superset, vec3XLessThan);
1118         const float                     epsilon                                 = 0.01f;
1119         const int                       maxNumFailurePrints             = 5;
1120         int                                     numFailuresDetected             = 0;
1121
1122         for (int subNdx = 0; subNdx < (int)subset.size(); subNdx++)
1123         {
1124                 const Vec3& subPt = subset[subNdx];
1125
1126                 bool matchFound = false;
1127
1128                 {
1129                         // Binary search the index of the first point in supersetSorted with x in the [subPt.x() - epsilon, subPt.x() + epsilon] range.
1130                         const Vec3      matchMin                        = subPt - epsilon;
1131                         const Vec3      matchMax                        = subPt + epsilon;
1132                         int                     firstCandidateNdx       = binarySearchFirstVec3WithXAtLeast(supersetSorted, matchMin.x());
1133
1134                         if (firstCandidateNdx >= 0)
1135                         {
1136                                 // Compare subPt to all points in supersetSorted with x in the [subPt.x() - epsilon, subPt.x() + epsilon] range.
1137                                 for (int superNdx = firstCandidateNdx; superNdx < (int)supersetSorted.size() && supersetSorted[superNdx].x() <= matchMax.x(); superNdx++)
1138                                 {
1139                                         const Vec3& superPt = supersetSorted[superNdx];
1140
1141                                         if (tcu::boolAll(tcu::greaterThanEqual  (superPt, matchMin)) &&
1142                                                 tcu::boolAll(tcu::lessThanEqual         (superPt, matchMax)))
1143                                         {
1144                                                 matchFound = true;
1145                                                 break;
1146                                         }
1147                                 }
1148                         }
1149                 }
1150
1151                 if (!matchFound)
1152                 {
1153                         numFailuresDetected++;
1154                         if (numFailuresDetected < maxNumFailurePrints)
1155                                 log << TestLog::Message << "Failure: no matching " << supersetName << " point found for " << subsetName << " point " << subPt << TestLog::EndMessage;
1156                         else if (numFailuresDetected == maxNumFailurePrints)
1157                                 log << TestLog::Message << "Note: More errors follow" << TestLog::EndMessage;
1158
1159                         drawTessCoordPoint(errorDst, primitiveType, subPt, errorColor, 4);
1160                 }
1161         }
1162
1163         return numFailuresDetected == 0;
1164 }
1165
1166 static bool compareTessCoords (TestLog& log, TessPrimitiveType primitiveType, const vector<Vec3>& refCoords, const vector<Vec3>& resCoords)
1167 {
1168         tcu::Surface    refVisual;
1169         tcu::Surface    resVisual;
1170         bool                    success = true;
1171
1172         drawTessCoordVisualization(refVisual, primitiveType, refCoords);
1173         drawTessCoordVisualization(resVisual, primitiveType, resCoords);
1174
1175         // Check that all points in reference also exist in result.
1176         success = oneWayComparePointSets(log, refVisual, primitiveType, refCoords, resCoords, "reference", "result", tcu::RGBA::blue()) && success;
1177         // Check that all points in result also exist in reference.
1178         success = oneWayComparePointSets(log, resVisual, primitiveType, resCoords, refCoords, "result", "reference", tcu::RGBA::red()) && success;
1179
1180         if (!success)
1181         {
1182                 log << TestLog::Message << "Note: in the following reference visualization, points that are missing in result point set are blue (if any)" << TestLog::EndMessage
1183                         << TestLog::Image("RefTessCoordVisualization", "Reference tessCoord visualization", refVisual)
1184                         << TestLog::Message << "Note: in the following result visualization, points that are missing in reference point set are red (if any)" << TestLog::EndMessage;
1185         }
1186
1187         log << TestLog::Image("ResTessCoordVisualization", "Result tessCoord visualization", resVisual);
1188
1189         return success;
1190 }
1191
1192 namespace VerifyFractionalSpacingSingleInternal
1193 {
1194
1195 struct Segment
1196 {
1197         int             index; //!< Index of left coordinate in sortedXCoords.
1198         float   length;
1199         Segment (void)                                          : index(-1),            length(-1.0f)   {}
1200         Segment (int index_, float length_)     : index(index_),        length(length_) {}
1201
1202         static vector<float> lengths (const vector<Segment>& segments) { return members(segments, &Segment::length); }
1203 };
1204
1205 }
1206
1207 /*--------------------------------------------------------------------*//*!
1208  * \brief Verify fractional spacing conditions for a single line
1209  *
1210  * Verify that the splitting of an edge (resulting from e.g. an isoline
1211  * with outer levels { 1.0, tessLevel }) with a given fractional spacing
1212  * mode fulfills certain conditions given in the spec.
1213  *
1214  * Note that some conditions can't be checked from just one line
1215  * (specifically, that the additional segment decreases monotonically
1216  * length and the requirement that the additional segments be placed
1217  * identically for identical values of clamped level).
1218  *
1219  * Therefore, the function stores some values to additionalSegmentLengthDst
1220  * and additionalSegmentLocationDst that can later be given to
1221  * verifyFractionalSpacingMultiple(). A negative value in length means that
1222  * no additional segments are present, i.e. there's just one segment.
1223  * A negative value in location means that the value wasn't determinable,
1224  * i.e. all segments had same length.
1225  * The values are not stored if false is returned.
1226  *//*--------------------------------------------------------------------*/
1227 static bool verifyFractionalSpacingSingle (TestLog& log, SpacingMode spacingMode, float tessLevel, const vector<float>& coords, float& additionalSegmentLengthDst, int& additionalSegmentLocationDst)
1228 {
1229         using namespace VerifyFractionalSpacingSingleInternal;
1230
1231         DE_ASSERT(spacingMode == SPACINGMODE_FRACTIONAL_ODD || spacingMode == SPACINGMODE_FRACTIONAL_EVEN);
1232
1233         const float                             clampedLevel    = getClampedTessLevel(spacingMode, tessLevel);
1234         const int                               finalLevel              = getRoundedTessLevel(spacingMode, clampedLevel);
1235         const vector<float>             sortedCoords    = sorted(coords);
1236         string                                  failNote                = "Note: tessellation level is " + de::toString(tessLevel) + "\nNote: sorted coordinates are:\n    " + containerStr(sortedCoords);
1237
1238         if ((int)coords.size() != finalLevel + 1)
1239         {
1240                 log << TestLog::Message << "Failure: number of vertices is " << coords.size() << "; expected " << finalLevel + 1
1241                         << " (clamped tessellation level is " << clampedLevel << ")"
1242                         << "; final level (clamped level rounded up to " << (spacingMode == SPACINGMODE_FRACTIONAL_EVEN ? "even" : "odd") << ") is " << finalLevel
1243                         << " and should equal the number of segments, i.e. number of vertices minus 1" << TestLog::EndMessage
1244                         << TestLog::Message << failNote << TestLog::EndMessage;
1245                 return false;
1246         }
1247
1248         if (sortedCoords[0] != 0.0f || sortedCoords.back() != 1.0f)
1249         {
1250                 log << TestLog::Message << "Failure: smallest coordinate should be 0.0 and biggest should be 1.0" << TestLog::EndMessage
1251                         << TestLog::Message << failNote << TestLog::EndMessage;
1252                 return false;
1253         }
1254
1255         {
1256                 vector<Segment> segments(finalLevel);
1257                 for (int i = 0; i < finalLevel; i++)
1258                         segments[i] = Segment(i, sortedCoords[i+1] - sortedCoords[i]);
1259
1260                 failNote += "\nNote: segment lengths are, from left to right:\n    " + containerStr(Segment::lengths(segments));
1261
1262                 {
1263                         // Divide segments to two different groups based on length.
1264
1265                         vector<Segment> segmentsA;
1266                         vector<Segment> segmentsB;
1267                         segmentsA.push_back(segments[0]);
1268
1269                         for (int segNdx = 1; segNdx < (int)segments.size(); segNdx++)
1270                         {
1271                                 const float             epsilon         = 0.001f;
1272                                 const Segment&  seg                     = segments[segNdx];
1273
1274                                 if (de::abs(seg.length - segmentsA[0].length) < epsilon)
1275                                         segmentsA.push_back(seg);
1276                                 else if (segmentsB.empty() || de::abs(seg.length - segmentsB[0].length) < epsilon)
1277                                         segmentsB.push_back(seg);
1278                                 else
1279                                 {
1280                                         log << TestLog::Message << "Failure: couldn't divide segments to 2 groups by length; "
1281                                                                                         << "e.g. segment of length " << seg.length << " isn't approximately equal to either "
1282                                                                                         << segmentsA[0].length << " or " << segmentsB[0].length << TestLog::EndMessage
1283                                                                                         << TestLog::Message << failNote << TestLog::EndMessage;
1284                                         return false;
1285                                 }
1286                         }
1287
1288                         if (clampedLevel == (float)finalLevel)
1289                         {
1290                                 // All segments should be of equal length.
1291                                 if (!segmentsA.empty() && !segmentsB.empty())
1292                                 {
1293                                         log << TestLog::Message << "Failure: clamped and final tessellation level are equal, but not all segments are of equal length." << TestLog::EndMessage
1294                                                 << TestLog::Message << failNote << TestLog::EndMessage;
1295                                         return false;
1296                                 }
1297                         }
1298
1299                         if (segmentsA.empty() || segmentsB.empty()) // All segments have same length. This is ok.
1300                         {
1301                                 additionalSegmentLengthDst              = segments.size() == 1 ? -1.0f : segments[0].length;
1302                                 additionalSegmentLocationDst    = -1;
1303                                 return true;
1304                         }
1305
1306                         if (segmentsA.size() != 2 && segmentsB.size() != 2)
1307                         {
1308                                 log << TestLog::Message << "Failure: when dividing the segments to 2 groups by length, neither of the two groups has exactly 2 or 0 segments in it" << TestLog::EndMessage
1309                                         << TestLog::Message << failNote << TestLog::EndMessage;
1310                                 return false;
1311                         }
1312
1313                         // For convenience, arrange so that the 2-segment group is segmentsB.
1314                         if (segmentsB.size() != 2)
1315                                 std::swap(segmentsA, segmentsB);
1316
1317                         // \note For 4-segment lines both segmentsA and segmentsB have 2 segments each.
1318                         //               Thus, we can't be sure which ones were meant as the additional segments.
1319                         //               We give the benefit of the doubt by assuming that they're the shorter
1320                         //               ones (as they should).
1321
1322                         if (segmentsA.size() != 2)
1323                         {
1324                                 if (segmentsB[0].length > segmentsA[0].length + 0.001f)
1325                                 {
1326                                         log << TestLog::Message << "Failure: the two additional segments are longer than the other segments" << TestLog::EndMessage
1327                                                 << TestLog::Message << failNote << TestLog::EndMessage;
1328                                         return false;
1329                                 }
1330                         }
1331                         else
1332                         {
1333                                 // We have 2 segmentsA and 2 segmentsB, ensure segmentsB has the shorter lengths
1334                                 if (segmentsB[0].length > segmentsA[0].length)
1335                                         std::swap(segmentsA, segmentsB);
1336                         }
1337
1338                         // Check that the additional segments are placed symmetrically.
1339                         if (segmentsB[0].index + segmentsB[1].index + 1 != (int)segments.size())
1340                         {
1341                                 log << TestLog::Message << "Failure: the two additional segments aren't placed symmetrically; "
1342                                                                                 << "one is at index " << segmentsB[0].index << " and other is at index " << segmentsB[1].index
1343                                                                                 << " (note: the two indexes should sum to " << (int)segments.size()-1 << ", i.e. numberOfSegments-1)" << TestLog::EndMessage
1344                                         << TestLog::Message << failNote << TestLog::EndMessage;
1345                                 return false;
1346                         }
1347
1348                         additionalSegmentLengthDst = segmentsB[0].length;
1349                         if (segmentsA.size() != 2)
1350                                 additionalSegmentLocationDst = de::min(segmentsB[0].index, segmentsB[1].index);
1351                         else
1352                                 additionalSegmentLocationDst = segmentsB[0].length < segmentsA[0].length - 0.001f ? de::min(segmentsB[0].index, segmentsB[1].index)
1353                                                                                          : -1; // \note -1 when can't reliably decide which ones are the additional segments, a or b.
1354
1355                         return true;
1356                 }
1357         }
1358 }
1359
1360 namespace VerifyFractionalSpacingMultipleInternal
1361 {
1362
1363 struct LineData
1364 {
1365         float   tessLevel;
1366         float   additionalSegmentLength;
1367         int             additionalSegmentLocation;
1368         LineData (float lev, float len, int loc) : tessLevel(lev), additionalSegmentLength(len), additionalSegmentLocation(loc) {}
1369 };
1370
1371 }
1372
1373 /*--------------------------------------------------------------------*//*!
1374  * \brief Verify fractional spacing conditions between multiple lines
1375  *
1376  * Verify the fractional spacing conditions that are not checked in
1377  * verifyFractionalSpacingSingle(). Uses values given by said function
1378  * as parameters, in addition to the spacing mode and tessellation level.
1379  *//*--------------------------------------------------------------------*/
1380 static bool verifyFractionalSpacingMultiple (TestLog& log, SpacingMode spacingMode, const vector<float>& tessLevels, const vector<float>& additionalSegmentLengths, const vector<int>& additionalSegmentLocations)
1381 {
1382         using namespace VerifyFractionalSpacingMultipleInternal;
1383
1384         DE_ASSERT(spacingMode == SPACINGMODE_FRACTIONAL_ODD || spacingMode == SPACINGMODE_FRACTIONAL_EVEN);
1385         DE_ASSERT(tessLevels.size() == additionalSegmentLengths.size() &&
1386                           tessLevels.size() == additionalSegmentLocations.size());
1387
1388         vector<LineData> lineDatas;
1389
1390         for (int i = 0; i < (int)tessLevels.size(); i++)
1391                 lineDatas.push_back(LineData(tessLevels[i], additionalSegmentLengths[i], additionalSegmentLocations[i]));
1392
1393         {
1394                 const vector<LineData> lineDatasSortedByLevel = sorted(lineDatas, memberPred<std::less>(&LineData::tessLevel));
1395
1396                 // Check that lines with identical clamped tessellation levels have identical additionalSegmentLocation.
1397
1398                 for (int lineNdx = 1; lineNdx < (int)lineDatasSortedByLevel.size(); lineNdx++)
1399                 {
1400                         const LineData& curData         = lineDatasSortedByLevel[lineNdx];
1401                         const LineData& prevData        = lineDatasSortedByLevel[lineNdx-1];
1402
1403                         if (curData.additionalSegmentLocation < 0 || prevData.additionalSegmentLocation < 0)
1404                                 continue; // Unknown locations, skip.
1405
1406                         if (getClampedTessLevel(spacingMode, curData.tessLevel) == getClampedTessLevel(spacingMode, prevData.tessLevel) &&
1407                                 curData.additionalSegmentLocation != prevData.additionalSegmentLocation)
1408                         {
1409                                 log << TestLog::Message << "Failure: additional segments not located identically for two edges with identical clamped tessellation levels" << TestLog::EndMessage
1410                                         << TestLog::Message << "Note: tessellation levels are " << curData.tessLevel << " and " << prevData.tessLevel
1411                                                                                 << " (clamped level " << getClampedTessLevel(spacingMode, curData.tessLevel) << ")"
1412                                                                                 << "; but first additional segments located at indices "
1413                                                                                 << curData.additionalSegmentLocation << " and " << prevData.additionalSegmentLocation << ", respectively" << TestLog::EndMessage;
1414                                 return false;
1415                         }
1416                 }
1417
1418                 // Check that, among lines with same clamped rounded tessellation level, additionalSegmentLength is monotonically decreasing with "clampedRoundedTessLevel - clampedTessLevel" (the "fraction").
1419
1420                 for (int lineNdx = 1; lineNdx < (int)lineDatasSortedByLevel.size(); lineNdx++)
1421                 {
1422                         const LineData&         curData                         = lineDatasSortedByLevel[lineNdx];
1423                         const LineData&         prevData                        = lineDatasSortedByLevel[lineNdx-1];
1424
1425                         if (curData.additionalSegmentLength < 0.0f || prevData.additionalSegmentLength < 0.0f)
1426                                 continue; // Unknown segment lengths, skip.
1427
1428                         const float                     curClampedLevel         = getClampedTessLevel(spacingMode, curData.tessLevel);
1429                         const float                     prevClampedLevel        = getClampedTessLevel(spacingMode, prevData.tessLevel);
1430                         const int                       curFinalLevel           = getRoundedTessLevel(spacingMode, curClampedLevel);
1431                         const int                       prevFinalLevel          = getRoundedTessLevel(spacingMode, prevClampedLevel);
1432
1433                         if (curFinalLevel != prevFinalLevel)
1434                                 continue;
1435
1436                         const float                     curFraction             = (float)curFinalLevel - curClampedLevel;
1437                         const float                     prevFraction    = (float)prevFinalLevel - prevClampedLevel;
1438
1439                         if (curData.additionalSegmentLength < prevData.additionalSegmentLength ||
1440                                 (curClampedLevel == prevClampedLevel && curData.additionalSegmentLength != prevData.additionalSegmentLength))
1441                         {
1442                                 log << TestLog::Message << "Failure: additional segment length isn't monotonically decreasing with the fraction <n> - <f>, among edges with same final tessellation level" << TestLog::EndMessage
1443                                         << TestLog::Message << "Note: <f> stands for the clamped tessellation level and <n> for the final (rounded and clamped) tessellation level" << TestLog::EndMessage
1444                                         << TestLog::Message << "Note: two edges have tessellation levels " << prevData.tessLevel << " and " << curData.tessLevel << " respectively"
1445                                                                                 << ", clamped " << prevClampedLevel << " and " << curClampedLevel << ", final " << prevFinalLevel << " and " << curFinalLevel
1446                                                                                 << "; fractions are " << prevFraction << " and " << curFraction
1447                                                                                 << ", but resulted in segment lengths " << prevData.additionalSegmentLength << " and " << curData.additionalSegmentLength << TestLog::EndMessage;
1448                                 return false;
1449                         }
1450                 }
1451         }
1452
1453         return true;
1454 }
1455
1456 //! Compare triangle sets, ignoring triangle order and vertex order within triangle, and possibly exclude some triangles too.
1457 template <typename IsTriangleRelevantT>
1458 static bool compareTriangleSets (const vector<Vec3>&                    coordsA,
1459                                                                  const vector<Vec3>&                    coordsB,
1460                                                                  TestLog&                                               log,
1461                                                                  const IsTriangleRelevantT&             isTriangleRelevant,
1462                                                                  const char*                                    ignoredTriangleDescription = DE_NULL)
1463 {
1464         typedef tcu::Vector<Vec3, 3>                                                    Triangle;
1465         typedef LexCompare<Triangle, 3, VecLexLessThan<3> >             TriangleLexLessThan;
1466         typedef std::set<Triangle, TriangleLexLessThan>                 TriangleSet;
1467
1468         DE_ASSERT(coordsA.size() % 3 == 0 && coordsB.size() % 3 == 0);
1469
1470         const int               numTrianglesA = (int)coordsA.size()/3;
1471         const int               numTrianglesB = (int)coordsB.size()/3;
1472         TriangleSet             trianglesA;
1473         TriangleSet             trianglesB;
1474
1475         for (int aOrB = 0; aOrB < 2; aOrB++)
1476         {
1477                 const vector<Vec3>&             coords                  = aOrB == 0 ? coordsA                   : coordsB;
1478                 const int                               numTriangles    = aOrB == 0 ? numTrianglesA             : numTrianglesB;
1479                 TriangleSet&                    triangles               = aOrB == 0 ? trianglesA                : trianglesB;
1480
1481                 for (int triNdx = 0; triNdx < numTriangles; triNdx++)
1482                 {
1483                         Triangle triangle(coords[3*triNdx + 0],
1484                                                           coords[3*triNdx + 1],
1485                                                           coords[3*triNdx + 2]);
1486
1487                         if (isTriangleRelevant(triangle.getPtr()))
1488                         {
1489                                 std::sort(triangle.getPtr(), triangle.getPtr()+3, VecLexLessThan<3>());
1490                                 triangles.insert(triangle);
1491                         }
1492                 }
1493         }
1494
1495         {
1496                 TriangleSet::const_iterator aIt = trianglesA.begin();
1497                 TriangleSet::const_iterator bIt = trianglesB.begin();
1498
1499                 while (aIt != trianglesA.end() || bIt != trianglesB.end())
1500                 {
1501                         const bool aEnd = aIt == trianglesA.end();
1502                         const bool bEnd = bIt == trianglesB.end();
1503
1504                         if (aEnd || bEnd || *aIt != *bIt)
1505                         {
1506                                 log << TestLog::Message << "Failure: triangle sets in two cases are not equal (when ignoring triangle and vertex order"
1507                                         << (ignoredTriangleDescription == DE_NULL ? "" : string() + ", and " + ignoredTriangleDescription) << ")" << TestLog::EndMessage;
1508
1509                                 if (!aEnd && (bEnd || TriangleLexLessThan()(*aIt, *bIt)))
1510                                         log << TestLog::Message << "Note: e.g. triangle " << *aIt << " exists for first case but not for second" << TestLog::EndMessage;
1511                                 else
1512                                         log << TestLog::Message << "Note: e.g. triangle " << *bIt << " exists for second case but not for first" << TestLog::EndMessage;
1513
1514                                 return false;
1515                         }
1516
1517                         ++aIt;
1518                         ++bIt;
1519                 }
1520
1521                 return true;
1522         }
1523 }
1524
1525 static bool compareTriangleSets (const vector<Vec3>& coordsA, const vector<Vec3>& coordsB, TestLog& log)
1526 {
1527         return compareTriangleSets(coordsA, coordsB, log, ConstantUnaryPredicate<const Vec3*, true>());
1528 }
1529
1530 static void checkGPUShader5Support (Context& context)
1531 {
1532         const bool supportsES32 = glu::contextSupports(context.getRenderContext().getType(), glu::ApiType::es(3, 2));
1533         TCU_CHECK_AND_THROW(NotSupportedError, supportsES32 || context.getContextInfo().isExtensionSupported("GL_EXT_gpu_shader5"), "GL_EXT_gpu_shader5 is not supported");
1534 }
1535
1536 static void checkTessellationSupport (Context& context)
1537 {
1538         const bool supportsES32 = glu::contextSupports(context.getRenderContext().getType(), glu::ApiType::es(3, 2));
1539         TCU_CHECK_AND_THROW(NotSupportedError, supportsES32 || context.getContextInfo().isExtensionSupported("GL_EXT_tessellation_shader"), "GL_EXT_tessellation_shader is not supported");
1540 }
1541
1542 static std::string specializeShader(Context& context, const char* code)
1543 {
1544         const glu::ContextType                          contextType             = context.getRenderContext().getType();
1545         const glu::GLSLVersion                          glslVersion             = glu::getContextTypeGLSLVersion(contextType);
1546         bool                                                            supportsES32    = glu::contextSupports(contextType, glu::ApiType::es(3, 2));
1547
1548         std::map<std::string, std::string>      specializationMap;
1549
1550         specializationMap["GLSL_VERSION_DECL"]                          = glu::getGLSLVersionDeclaration(glslVersion);
1551         specializationMap["GPU_SHADER5_REQUIRE"]                        = supportsES32 ? "" : "#extension GL_EXT_gpu_shader5 : require";
1552         specializationMap["TESSELLATION_SHADER_REQUIRE"]        = supportsES32 ? "" : "#extension GL_EXT_tessellation_shader : require";
1553
1554         return tcu::StringTemplate(code).specialize(specializationMap);
1555 }
1556
1557 // Draw primitives with shared edges and check that no cracks are visible at the shared edges.
1558 class CommonEdgeCase : public TestCase
1559 {
1560 public:
1561         enum CaseType
1562         {
1563                 CASETYPE_BASIC = 0,             //!< Order patch vertices such that when two patches share a vertex, it's at the same index for both.
1564                 CASETYPE_PRECISE,               //!< Vertex indices don't match like for CASETYPE_BASIC, but other measures are taken, using the 'precise' qualifier.
1565
1566                 CASETYPE_LAST
1567         };
1568
1569         CommonEdgeCase (Context& context, const char* name, const char* description, TessPrimitiveType primitiveType, SpacingMode spacing, CaseType caseType)
1570                 : TestCase                      (context, name, description)
1571                 , m_primitiveType       (primitiveType)
1572                 , m_spacing                     (spacing)
1573                 , m_caseType            (caseType)
1574         {
1575                 DE_ASSERT(m_primitiveType == TESSPRIMITIVETYPE_TRIANGLES || m_primitiveType == TESSPRIMITIVETYPE_QUADS);
1576         }
1577
1578         void                                                    init            (void);
1579         void                                                    deinit          (void);
1580         IterateResult                                   iterate         (void);
1581
1582 private:
1583         static const int                                RENDER_SIZE = 256;
1584
1585         const TessPrimitiveType                 m_primitiveType;
1586         const SpacingMode                               m_spacing;
1587         const CaseType                                  m_caseType;
1588
1589         SharedPtr<const ShaderProgram>  m_program;
1590 };
1591
1592 void CommonEdgeCase::init (void)
1593 {
1594         checkTessellationSupport(m_context);
1595
1596         if (m_caseType == CASETYPE_PRECISE)
1597                 checkGPUShader5Support(m_context);
1598
1599         checkRenderTargetSize(m_context.getRenderTarget(), RENDER_SIZE);
1600
1601         std::string vertexShaderTemplate                        ("${GLSL_VERSION_DECL}\n"
1602                                                                                                          "\n"
1603                                                                                                          "in highp vec2 in_v_position;\n"
1604                                                                                                          "in highp float in_v_tessParam;\n"
1605                                                                                                          "\n"
1606                                                                                                          "out highp vec2 in_tc_position;\n"
1607                                                                                                          "out highp float in_tc_tessParam;\n"
1608                                                                                                          "\n"
1609                                                                                                          "void main (void)\n"
1610                                                                                                          "{\n"
1611                                                                                                          "      in_tc_position = in_v_position;\n"
1612                                                                                                          "      in_tc_tessParam = in_v_tessParam;\n"
1613                                                                                                  "}\n");
1614
1615         std::string tessellationControlTemplate         ("${GLSL_VERSION_DECL}\n"
1616                                                                                                  "${TESSELLATION_SHADER_REQUIRE}\n"
1617                                                                                                  + string(m_caseType == CASETYPE_PRECISE ? "${GPU_SHADER5_REQUIRE}\n" : "") +
1618                                                                                                          "\n"
1619                                                                                                          "layout (vertices = " + string(m_primitiveType == TESSPRIMITIVETYPE_TRIANGLES ? "3" : m_primitiveType == TESSPRIMITIVETYPE_QUADS ? "4" : DE_NULL) + ") out;\n"
1620                                                                                                          "\n"
1621                                                                                                          "in highp vec2 in_tc_position[];\n"
1622                                                                                                          "in highp float in_tc_tessParam[];\n"
1623                                                                                                          "\n"
1624                                                                                                          "out highp vec2 in_te_position[];\n"
1625                                                                                                          "\n"
1626                                                                                                          + (m_caseType == CASETYPE_PRECISE ? "precise gl_TessLevelOuter;\n\n" : "") +
1627                                                                                                          "void main (void)\n"
1628                                                                                                          "{\n"
1629                                                                                                          "      in_te_position[gl_InvocationID] = in_tc_position[gl_InvocationID];\n"
1630                                                                                                          "\n"
1631                                                                                                          "      gl_TessLevelInner[0] = 5.0;\n"
1632                                                                                                          "      gl_TessLevelInner[1] = 5.0;\n"
1633                                                                                                          "\n"
1634                                                                                                          + (m_primitiveType == TESSPRIMITIVETYPE_TRIANGLES ?
1635                                                                                                                 "       gl_TessLevelOuter[0] = 1.0 + 59.0 * 0.5 * (in_tc_tessParam[1] + in_tc_tessParam[2]);\n"
1636                                                                                                                 "       gl_TessLevelOuter[1] = 1.0 + 59.0 * 0.5 * (in_tc_tessParam[2] + in_tc_tessParam[0]);\n"
1637                                                                                                                 "       gl_TessLevelOuter[2] = 1.0 + 59.0 * 0.5 * (in_tc_tessParam[0] + in_tc_tessParam[1]);\n"
1638                                                                                                           : m_primitiveType == TESSPRIMITIVETYPE_QUADS ?
1639                                                                                                                 "       gl_TessLevelOuter[0] = 1.0 + 59.0 * 0.5 * (in_tc_tessParam[0] + in_tc_tessParam[2]);\n"
1640                                                                                                                 "       gl_TessLevelOuter[1] = 1.0 + 59.0 * 0.5 * (in_tc_tessParam[1] + in_tc_tessParam[0]);\n"
1641                                                                                                                 "       gl_TessLevelOuter[2] = 1.0 + 59.0 * 0.5 * (in_tc_tessParam[3] + in_tc_tessParam[1]);\n"
1642                                                                                                                 "       gl_TessLevelOuter[3] = 1.0 + 59.0 * 0.5 * (in_tc_tessParam[2] + in_tc_tessParam[3]);\n"
1643                                                                                                           : DE_NULL) +
1644                                                                                                  "}\n");
1645
1646         std::string tessellationEvaluationTemplate      ("${GLSL_VERSION_DECL}\n"
1647                                                                                                  "${TESSELLATION_SHADER_REQUIRE}\n"
1648                                                                                                  + string(m_caseType == CASETYPE_PRECISE ? "${GPU_SHADER5_REQUIRE}\n" : "") +
1649                                                                                                          "\n"
1650                                                                                                          + getTessellationEvaluationInLayoutString(m_primitiveType, m_spacing) +
1651                                                                                                          "\n"
1652                                                                                                          "in highp vec2 in_te_position[];\n"
1653                                                                                                          "\n"
1654                                                                                                          "out mediump vec4 in_f_color;\n"
1655                                                                                                          "\n"
1656                                                                                                          + (m_caseType == CASETYPE_PRECISE ? "precise gl_Position;\n\n" : "") +
1657                                                                                                          "void main (void)\n"
1658                                                                                                          "{\n"
1659                                                                                                          + (m_primitiveType == TESSPRIMITIVETYPE_TRIANGLES ?
1660                                                                                                                 "       highp vec2 pos = gl_TessCoord.x*in_te_position[0] + gl_TessCoord.y*in_te_position[1] + gl_TessCoord.z*in_te_position[2];\n"
1661                                                                                                                 "\n"
1662                                                                                                                 "       highp float f = sqrt(3.0 * min(gl_TessCoord.x, min(gl_TessCoord.y, gl_TessCoord.z))) * 0.5 + 0.5;\n"
1663                                                                                                                 "       in_f_color = vec4(gl_TessCoord*f, 1.0);\n"
1664                                                                                                           : m_primitiveType == TESSPRIMITIVETYPE_QUADS ?
1665                                                                                                             string()
1666                                                                                                                 + (m_caseType == CASETYPE_BASIC ?
1667                                                                                                                         "       highp vec2 pos = (1.0-gl_TessCoord.x)*(1.0-gl_TessCoord.y)*in_te_position[0]\n"
1668                                                                                                                         "                      + (    gl_TessCoord.x)*(1.0-gl_TessCoord.y)*in_te_position[1]\n"
1669                                                                                                                         "                      + (1.0-gl_TessCoord.x)*(    gl_TessCoord.y)*in_te_position[2]\n"
1670                                                                                                                         "                      + (    gl_TessCoord.x)*(    gl_TessCoord.y)*in_te_position[3];\n"
1671                                                                                                                  : m_caseType == CASETYPE_PRECISE ?
1672                                                                                                                         "       highp vec2 a = (1.0-gl_TessCoord.x)*(1.0-gl_TessCoord.y)*in_te_position[0];\n"
1673                                                                                                                         "       highp vec2 b = (    gl_TessCoord.x)*(1.0-gl_TessCoord.y)*in_te_position[1];\n"
1674                                                                                                                         "       highp vec2 c = (1.0-gl_TessCoord.x)*(    gl_TessCoord.y)*in_te_position[2];\n"
1675                                                                                                                         "       highp vec2 d = (    gl_TessCoord.x)*(    gl_TessCoord.y)*in_te_position[3];\n"
1676                                                                                                                         "       highp vec2 pos = a+b+c+d;\n"
1677                                                                                                                  : DE_NULL) +
1678                                                                                                                 "\n"
1679                                                                                                                 "       highp float f = sqrt(1.0 - 2.0 * max(abs(gl_TessCoord.x - 0.5), abs(gl_TessCoord.y - 0.5)))*0.5 + 0.5;\n"
1680                                                                                                                 "       in_f_color = vec4(0.1, gl_TessCoord.xy*f, 1.0);\n"
1681                                                                                                           : DE_NULL) +
1682                                                                                                          "\n"
1683                                                                                                          "      // Offset the position slightly, based on the parity of the bits in the float representation.\n"
1684                                                                                                          "      // This is done to detect possible small differences in edge vertex positions between patches.\n"
1685                                                                                                          "      uvec2 bits = floatBitsToUint(pos);\n"
1686                                                                                                          "      uint numBits = 0u;\n"
1687                                                                                                          "      for (uint i = 0u; i < 32u; i++)\n"
1688                                                                                                          "              numBits += ((bits[0] >> i) & 1u) + ((bits[1] >> i) & 1u);\n"
1689                                                                                                          "      pos += float(numBits&1u)*0.04;\n"
1690                                                                                                          "\n"
1691                                                                                                          "      gl_Position = vec4(pos, 0.0, 1.0);\n"
1692                                                                                                  "}\n");
1693
1694         std::string fragmentShaderTemplate                      ("${GLSL_VERSION_DECL}\n"
1695                                                                                                          "\n"
1696                                                                                                          "layout (location = 0) out mediump vec4 o_color;\n"
1697                                                                                                          "\n"
1698                                                                                                          "in mediump vec4 in_f_color;\n"
1699                                                                                                          "\n"
1700                                                                                                          "void main (void)\n"
1701                                                                                                          "{\n"
1702                                                                                                          "      o_color = in_f_color;\n"
1703                                                                                                  "}\n");
1704
1705         m_program = SharedPtr<const ShaderProgram>(new ShaderProgram(m_context.getRenderContext(), glu::ProgramSources()
1706                         << glu::VertexSource                                    (specializeShader(m_context, vertexShaderTemplate.c_str()))
1707                         << glu::TessellationControlSource               (specializeShader(m_context, tessellationControlTemplate.c_str()))
1708                         << glu::TessellationEvaluationSource    (specializeShader(m_context, tessellationEvaluationTemplate.c_str()))
1709                         << glu::FragmentSource                                  (specializeShader(m_context, fragmentShaderTemplate.c_str()))));
1710
1711         m_testCtx.getLog() << *m_program;
1712         if (!m_program->isOk())
1713                 TCU_FAIL("Program compilation failed");
1714 }
1715
1716 void CommonEdgeCase::deinit (void)
1717 {
1718         m_program.clear();
1719 }
1720
1721 CommonEdgeCase::IterateResult CommonEdgeCase::iterate (void)
1722 {
1723         TestLog&                                        log                                             = m_testCtx.getLog();
1724         const RenderContext&            renderCtx                               = m_context.getRenderContext();
1725         const RandomViewport            viewport                                (renderCtx.getRenderTarget(), RENDER_SIZE, RENDER_SIZE, deStringHash(getName()));
1726         const deUint32                          programGL                               = m_program->getProgram();
1727         const glw::Functions&           gl                                              = renderCtx.getFunctions();
1728
1729         const int                                       gridWidth                               = 4;
1730         const int                                       gridHeight                              = 4;
1731         const int                                       numVertices                             = (gridWidth+1)*(gridHeight+1);
1732         const int                                       numIndices                              = gridWidth*gridHeight * (m_primitiveType == TESSPRIMITIVETYPE_TRIANGLES ? 3*2 : m_primitiveType == TESSPRIMITIVETYPE_QUADS ? 4 : -1);
1733         const int                                       numPosCompsPerVertex    = 2;
1734         const int                                       totalNumPosComps                = numPosCompsPerVertex*numVertices;
1735         vector<float>                           gridPosComps;
1736         vector<float>                           gridTessParams;
1737         vector<deUint16>                        gridIndices;
1738
1739         gridPosComps.reserve(totalNumPosComps);
1740         gridTessParams.reserve(numVertices);
1741         gridIndices.reserve(numIndices);
1742
1743         {
1744                 for (int i = 0; i < gridHeight+1; i++)
1745                 for (int j = 0; j < gridWidth+1; j++)
1746                 {
1747                         gridPosComps.push_back(-1.0f + 2.0f * ((float)j + 0.5f) / (float)(gridWidth+1));
1748                         gridPosComps.push_back(-1.0f + 2.0f * ((float)i + 0.5f) / (float)(gridHeight+1));
1749                         gridTessParams.push_back((float)(i*(gridWidth+1) + j) / (float)(numVertices-1));
1750                 }
1751         }
1752
1753         // Generate patch vertex indices.
1754         // \note If CASETYPE_BASIC, the vertices are ordered such that when multiple
1755         //               triangles/quads share a vertex, it's at the same index for everyone.
1756
1757         if (m_primitiveType == TESSPRIMITIVETYPE_TRIANGLES)
1758         {
1759                 for (int i = 0; i < gridHeight; i++)
1760                 for (int j = 0; j < gridWidth; j++)
1761                 {
1762                         const deUint16 corners[4] =
1763                         {
1764                                 (deUint16)((i+0)*(gridWidth+1) + j+0),
1765                                 (deUint16)((i+0)*(gridWidth+1) + j+1),
1766                                 (deUint16)((i+1)*(gridWidth+1) + j+0),
1767                                 (deUint16)((i+1)*(gridWidth+1) + j+1)
1768                         };
1769
1770                         const int secondTriangleVertexIndexOffset = m_caseType == CASETYPE_BASIC        ? 0
1771                                                                                                           : m_caseType == CASETYPE_PRECISE      ? 1
1772                                                                                                           : -1;
1773                         DE_ASSERT(secondTriangleVertexIndexOffset != -1);
1774
1775                         for (int k = 0; k < 3; k++)
1776                                 gridIndices.push_back(corners[(k+0 + i + (2-j%3)) % 3]);
1777                         for (int k = 0; k < 3; k++)
1778                                 gridIndices.push_back(corners[(k+2 + i + (2-j%3) + secondTriangleVertexIndexOffset) % 3 + 1]);
1779                 }
1780         }
1781         else if (m_primitiveType == TESSPRIMITIVETYPE_QUADS)
1782         {
1783                 for (int i = 0; i < gridHeight; i++)
1784                 for (int j = 0; j < gridWidth; j++)
1785                 {
1786                         // \note The vertices are ordered such that when multiple quads
1787                         //               share a vertices, it's at the same index for everyone.
1788                         for (int m = 0; m < 2; m++)
1789                         for (int n = 0; n < 2; n++)
1790                                 gridIndices.push_back((deUint16)((i+(i+m)%2)*(gridWidth+1) + j+(j+n)%2));
1791
1792                         if(m_caseType == CASETYPE_PRECISE && (i+j) % 2 == 0)
1793                                 std::reverse(gridIndices.begin() + (gridIndices.size() - 4),
1794                                                          gridIndices.begin() + gridIndices.size());
1795                 }
1796         }
1797         else
1798                 DE_ASSERT(false);
1799
1800         DE_ASSERT((int)gridPosComps.size() == totalNumPosComps);
1801         DE_ASSERT((int)gridTessParams.size() == numVertices);
1802         DE_ASSERT((int)gridIndices.size() == numIndices);
1803
1804         setViewport(gl, viewport);
1805         gl.clearColor(0.0f, 0.0f, 0.0f, 1.0f);
1806         gl.useProgram(programGL);
1807
1808         {
1809                 gl.patchParameteri(GL_PATCH_VERTICES, m_primitiveType == TESSPRIMITIVETYPE_TRIANGLES ? 3 : m_primitiveType == TESSPRIMITIVETYPE_QUADS ? 4 : -1);
1810                 gl.clear(GL_COLOR_BUFFER_BIT);
1811
1812                 const glu::VertexArrayBinding attrBindings[] =
1813                 {
1814                         glu::va::Float("in_v_position", numPosCompsPerVertex, numVertices, 0, &gridPosComps[0]),
1815                         glu::va::Float("in_v_tessParam", 1, numVertices, 0, &gridTessParams[0])
1816                 };
1817
1818                 glu::draw(renderCtx, programGL, DE_LENGTH_OF_ARRAY(attrBindings), &attrBindings[0],
1819                         glu::pr::Patches((int)gridIndices.size(), &gridIndices[0]));
1820                 GLU_EXPECT_NO_ERROR(gl.getError(), "Draw failed");
1821         }
1822
1823         {
1824                 const tcu::Surface rendered = getPixels(renderCtx, viewport);
1825
1826                 log << TestLog::Image("RenderedImage", "Rendered Image", rendered)
1827                         << TestLog::Message << "Note: coloring is done to clarify the positioning and orientation of the "
1828                                                                 << (m_primitiveType == TESSPRIMITIVETYPE_TRIANGLES ? "triangles" : m_primitiveType == TESSPRIMITIVETYPE_QUADS ? "quads" : DE_NULL)
1829                                                                 << "; the color of a vertex corresponds to the index of that vertex in the patch"
1830                                                                 << TestLog::EndMessage;
1831
1832                 if (m_caseType == CASETYPE_BASIC)
1833                         log << TestLog::Message << "Note: each shared vertex has the same index among the primitives it belongs to" << TestLog::EndMessage;
1834                 else if (m_caseType == CASETYPE_PRECISE)
1835                         log << TestLog::Message << "Note: the 'precise' qualifier is used to avoid cracks between primitives" << TestLog::EndMessage;
1836                 else
1837                         DE_ASSERT(false);
1838
1839                 // Ad-hoc result verification - check that a certain rectangle in the image contains no black pixels.
1840
1841                 const int startX        = (int)(0.15f * (float)rendered.getWidth());
1842                 const int endX          = (int)(0.85f * (float)rendered.getWidth());
1843                 const int startY        = (int)(0.15f * (float)rendered.getHeight());
1844                 const int endY          = (int)(0.85f * (float)rendered.getHeight());
1845
1846                 for (int y = startY; y < endY; y++)
1847                 for (int x = startX; x < endX; x++)
1848                 {
1849                         const tcu::RGBA pixel = rendered.getPixel(x, y);
1850
1851                         if (pixel.getRed() == 0 && pixel.getGreen() == 0 && pixel.getBlue() == 0)
1852                         {
1853                                 log << TestLog::Message << "Failure: there seem to be cracks in the rendered result" << TestLog::EndMessage
1854                                         << TestLog::Message << "Note: pixel with zero r, g and b channels found at " << tcu::IVec2(x, y) << TestLog::EndMessage;
1855
1856                                 m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "Image verification failed");
1857                                 return STOP;
1858                         }
1859                 }
1860
1861                 log << TestLog::Message << "Success: there seem to be no cracks in the rendered result" << TestLog::EndMessage;
1862         }
1863
1864         m_testCtx.setTestResult(QP_TEST_RESULT_PASS, "Pass");
1865         return STOP;
1866 }
1867
1868 // Check tessellation coordinates (read with transform feedback).
1869 class TessCoordCase : public TestCase
1870 {
1871 public:
1872                                         TessCoordCase (Context& context, const char* name, const char* description, TessPrimitiveType primitiveType, SpacingMode spacing)
1873                                                 : TestCase                      (context, name, description)
1874                                                 , m_primitiveType       (primitiveType)
1875                                                 , m_spacing                     (spacing)
1876                                         {
1877                                         }
1878
1879         void                    init            (void);
1880         void                    deinit          (void);
1881         IterateResult   iterate         (void);
1882
1883 private:
1884         struct TessLevels
1885         {
1886                 float inner[2];
1887                 float outer[4];
1888         };
1889
1890         static const int                                RENDER_SIZE = 16;
1891
1892         vector<TessLevels>                              genTessLevelCases (void) const;
1893
1894         const TessPrimitiveType                 m_primitiveType;
1895         const SpacingMode                               m_spacing;
1896
1897         SharedPtr<const ShaderProgram>  m_program;
1898 };
1899
1900 void TessCoordCase::init (void)
1901 {
1902         checkTessellationSupport(m_context);
1903         checkRenderTargetSize(m_context.getRenderTarget(), RENDER_SIZE);
1904
1905         std::string vertexShaderTemplate                        ("${GLSL_VERSION_DECL}\n"
1906                                                                                                          "\n"
1907                                                                                                          "void main (void)\n"
1908                                                                                                          "{\n"
1909                                                                                                  "}\n");
1910
1911         std::string tessellationControlTemplate         ("${GLSL_VERSION_DECL}\n"
1912                                                                                                  "${TESSELLATION_SHADER_REQUIRE}\n"
1913                                                                                                          "\n"
1914                                                                                                          "layout (vertices = 1) out;\n"
1915                                                                                                          "\n"
1916                                                                                                          "uniform mediump float u_tessLevelInner0;\n"
1917                                                                                                          "uniform mediump float u_tessLevelInner1;\n"
1918                                                                                                          "\n"
1919                                                                                                          "uniform mediump float u_tessLevelOuter0;\n"
1920                                                                                                          "uniform mediump float u_tessLevelOuter1;\n"
1921                                                                                                          "uniform mediump float u_tessLevelOuter2;\n"
1922                                                                                                          "uniform mediump float u_tessLevelOuter3;\n"
1923                                                                                                          "\n"
1924                                                                                                          "void main (void)\n"
1925                                                                                                          "{\n"
1926                                                                                                          "      gl_TessLevelInner[0] = u_tessLevelInner0;\n"
1927                                                                                                          "      gl_TessLevelInner[1] = u_tessLevelInner1;\n"
1928                                                                                                          "\n"
1929                                                                                                          "      gl_TessLevelOuter[0] = u_tessLevelOuter0;\n"
1930                                                                                                          "      gl_TessLevelOuter[1] = u_tessLevelOuter1;\n"
1931                                                                                                          "      gl_TessLevelOuter[2] = u_tessLevelOuter2;\n"
1932                                                                                                          "      gl_TessLevelOuter[3] = u_tessLevelOuter3;\n"
1933                                                                                                  "}\n");
1934
1935         std::string tessellationEvaluationTemplate      ("${GLSL_VERSION_DECL}\n"
1936                                                                                                  "${TESSELLATION_SHADER_REQUIRE}\n"
1937                                                                                                          "\n"
1938                                                                                                          + getTessellationEvaluationInLayoutString(m_primitiveType, m_spacing, true) +
1939                                                                                                          "\n"
1940                                                                                                          "out highp vec3 out_te_tessCoord;\n"
1941                                                                                                          "\n"
1942                                                                                                          "void main (void)\n"
1943                                                                                                          "{\n"
1944                                                                                                          "      out_te_tessCoord = gl_TessCoord;\n"
1945                                                                                                          "      gl_Position = vec4(gl_TessCoord.xy*1.6 - 0.8, 0.0, 1.0);\n"
1946                                                                                                  "}\n");
1947
1948         std::string fragmentShaderTemplate                      ("${GLSL_VERSION_DECL}\n"
1949                                                                                                          "\n"
1950                                                                                                          "layout (location = 0) out mediump vec4 o_color;\n"
1951                                                                                                          "\n"
1952                                                                                                          "void main (void)\n"
1953                                                                                                          "{\n"
1954                                                                                                          "      o_color = vec4(1.0);\n"
1955                                                                                                  "}\n");
1956
1957        m_program = SharedPtr<const ShaderProgram>(new ShaderProgram(m_context.getRenderContext(), glu::ProgramSources()
1958                         << glu::VertexSource                                    (specializeShader(m_context, vertexShaderTemplate.c_str()))
1959                         << glu::TessellationControlSource               (specializeShader(m_context, tessellationControlTemplate.c_str()))
1960                         << glu::TessellationEvaluationSource    (specializeShader(m_context, tessellationEvaluationTemplate.c_str()))
1961                         << glu::FragmentSource                                  (specializeShader(m_context, fragmentShaderTemplate.c_str()))
1962                         << glu::TransformFeedbackVarying                ("out_te_tessCoord")
1963                         << glu::TransformFeedbackMode                   (GL_INTERLEAVED_ATTRIBS)));
1964
1965         m_testCtx.getLog() << *m_program;
1966         if (!m_program->isOk())
1967                 TCU_FAIL("Program compilation failed");
1968 }
1969
1970 void TessCoordCase::deinit (void)
1971 {
1972         m_program.clear();
1973 }
1974
1975 vector<TessCoordCase::TessLevels> TessCoordCase::genTessLevelCases (void) const
1976 {
1977         static const TessLevels rawTessLevelCases[] =
1978         {
1979                 { { 1.0f,       1.0f    },      { 1.0f,         1.0f,   1.0f,   1.0f    } },
1980                 { { 63.0f,      24.0f   },      { 15.0f,        42.0f,  10.0f,  12.0f   } },
1981                 { { 3.0f,       2.0f    },      { 6.0f,         8.0f,   7.0f,   9.0f    } },
1982                 { { 4.0f,       6.0f    },      { 2.0f,         3.0f,   1.0f,   4.0f    } },
1983                 { { 2.0f,       2.0f    },      { 6.0f,         8.0f,   7.0f,   9.0f    } },
1984                 { { 5.0f,       6.0f    },      { 1.0f,         1.0f,   1.0f,   1.0f    } },
1985                 { { 1.0f,       6.0f    },      { 2.0f,         3.0f,   1.0f,   4.0f    } },
1986                 { { 5.0f,       1.0f    },      { 2.0f,         3.0f,   1.0f,   4.0f    } },
1987                 { { 5.2f,       1.6f    },      { 2.9f,         3.4f,   1.5f,   4.1f    } }
1988         };
1989
1990         if (m_spacing == SPACINGMODE_EQUAL)
1991                 return vector<TessLevels>(DE_ARRAY_BEGIN(rawTessLevelCases), DE_ARRAY_END(rawTessLevelCases));
1992         else
1993         {
1994                 vector<TessLevels> result;
1995                 result.reserve(DE_LENGTH_OF_ARRAY(rawTessLevelCases));
1996
1997                 for (int tessLevelCaseNdx = 0; tessLevelCaseNdx < DE_LENGTH_OF_ARRAY(rawTessLevelCases); tessLevelCaseNdx++)
1998                 {
1999                         TessLevels curTessLevelCase = rawTessLevelCases[tessLevelCaseNdx];
2000
2001                         float* const inner = &curTessLevelCase.inner[0];
2002                         float* const outer = &curTessLevelCase.outer[0];
2003
2004                         for (int j = 0; j < 2; j++) inner[j] = (float)getClampedRoundedTessLevel(m_spacing, inner[j]);
2005                         for (int j = 0; j < 4; j++) outer[j] = (float)getClampedRoundedTessLevel(m_spacing, outer[j]);
2006
2007                         if (m_primitiveType == TESSPRIMITIVETYPE_TRIANGLES)
2008                         {
2009                                 if (outer[0] > 1.0f || outer[1] > 1.0f || outer[2] > 1.0f)
2010                                 {
2011                                         if (inner[0] == 1.0f)
2012                                                 inner[0] = (float)getClampedRoundedTessLevel(m_spacing, inner[0] + 0.1f);
2013                                 }
2014                         }
2015                         else if (m_primitiveType == TESSPRIMITIVETYPE_QUADS)
2016                         {
2017                                 if (outer[0] > 1.0f || outer[1] > 1.0f || outer[2] > 1.0f || outer[3] > 1.0f)
2018                                 {
2019                                         if (inner[0] == 1.0f) inner[0] = (float)getClampedRoundedTessLevel(m_spacing, inner[0] + 0.1f);
2020                                         if (inner[1] == 1.0f) inner[1] = (float)getClampedRoundedTessLevel(m_spacing, inner[1] + 0.1f);
2021                                 }
2022                         }
2023
2024                         result.push_back(curTessLevelCase);
2025                 }
2026
2027                 DE_ASSERT((int)result.size() == DE_LENGTH_OF_ARRAY(rawTessLevelCases));
2028                 return result;
2029         }
2030 }
2031
2032 TessCoordCase::IterateResult TessCoordCase::iterate (void)
2033 {
2034         typedef TransformFeedbackHandler<Vec3> TFHandler;
2035
2036         TestLog&                                                log                                                     = m_testCtx.getLog();
2037         const RenderContext&                    renderCtx                                       = m_context.getRenderContext();
2038         const RandomViewport                    viewport                                        (renderCtx.getRenderTarget(), RENDER_SIZE, RENDER_SIZE, deStringHash(getName()));
2039         const deUint32                                  programGL                                       = m_program->getProgram();
2040         const glw::Functions&                   gl                                                      = renderCtx.getFunctions();
2041
2042         const int                                               tessLevelInner0Loc                      = gl.getUniformLocation(programGL, "u_tessLevelInner0");
2043         const int                                               tessLevelInner1Loc                      = gl.getUniformLocation(programGL, "u_tessLevelInner1");
2044         const int                                               tessLevelOuter0Loc                      = gl.getUniformLocation(programGL, "u_tessLevelOuter0");
2045         const int                                               tessLevelOuter1Loc                      = gl.getUniformLocation(programGL, "u_tessLevelOuter1");
2046         const int                                               tessLevelOuter2Loc                      = gl.getUniformLocation(programGL, "u_tessLevelOuter2");
2047         const int                                               tessLevelOuter3Loc                      = gl.getUniformLocation(programGL, "u_tessLevelOuter3");
2048
2049         const vector<TessLevels>                tessLevelCases                          = genTessLevelCases();
2050         vector<vector<Vec3> >                   caseReferences                          (tessLevelCases.size());
2051
2052         for (int i = 0; i < (int)tessLevelCases.size(); i++)
2053                 caseReferences[i] = generateReferenceTessCoords(m_primitiveType, m_spacing, &tessLevelCases[i].inner[0], &tessLevelCases[i].outer[0]);
2054
2055         const int                                               maxNumVertices                          = (int)std::max_element(caseReferences.begin(), caseReferences.end(), SizeLessThan<vector<Vec3> >())->size();
2056         const TFHandler                                 tfHandler                                       (m_context.getRenderContext(), maxNumVertices);
2057
2058         bool                                                    success                                         = true;
2059
2060         setViewport(gl, viewport);
2061         gl.useProgram(programGL);
2062
2063         gl.patchParameteri(GL_PATCH_VERTICES, 1);
2064
2065         for (int tessLevelCaseNdx = 0; tessLevelCaseNdx < (int)tessLevelCases.size(); tessLevelCaseNdx++)
2066         {
2067                 const float* const innerLevels = &tessLevelCases[tessLevelCaseNdx].inner[0];
2068                 const float* const outerLevels = &tessLevelCases[tessLevelCaseNdx].outer[0];
2069
2070                 log << TestLog::Message << "Tessellation levels: " << tessellationLevelsString(innerLevels, outerLevels, m_primitiveType) << TestLog::EndMessage;
2071
2072                 gl.uniform1f(tessLevelInner0Loc, innerLevels[0]);
2073                 gl.uniform1f(tessLevelInner1Loc, innerLevels[1]);
2074                 gl.uniform1f(tessLevelOuter0Loc, outerLevels[0]);
2075                 gl.uniform1f(tessLevelOuter1Loc, outerLevels[1]);
2076                 gl.uniform1f(tessLevelOuter2Loc, outerLevels[2]);
2077                 gl.uniform1f(tessLevelOuter3Loc, outerLevels[3]);
2078                 GLU_EXPECT_NO_ERROR(gl.getError(), "Setup failed");
2079
2080                 {
2081                         const vector<Vec3>&                     tessCoordsRef   = caseReferences[tessLevelCaseNdx];
2082                         const TFHandler::Result         tfResult                = tfHandler.renderAndGetPrimitives(programGL, GL_POINTS, 0, DE_NULL, 1);
2083
2084                         if (tfResult.numPrimitives != (int)tessCoordsRef.size())
2085                         {
2086                                 log << TestLog::Message << "Failure: GL reported GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN to be "
2087                                                                                 << tfResult.numPrimitives << ", reference value is " << tessCoordsRef.size()
2088                                                                                 << " (logging further info anyway)" << TestLog::EndMessage;
2089                                 success = false;
2090                         }
2091                         else
2092                                 log << TestLog::Message << "Note: GL reported GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN to be " << tfResult.numPrimitives << TestLog::EndMessage;
2093
2094                         if (m_primitiveType == TESSPRIMITIVETYPE_TRIANGLES)
2095                                 log << TestLog::Message << "Note: in the following visualization(s), the u=1, v=1, w=1 corners are at the right, top, and left corners, respectively" << TestLog::EndMessage;
2096                         else if (m_primitiveType == TESSPRIMITIVETYPE_QUADS || m_primitiveType == TESSPRIMITIVETYPE_ISOLINES)
2097                                 log << TestLog::Message << "Note: in the following visualization(s), u and v coordinate go left-to-right and bottom-to-top, respectively" << TestLog::EndMessage;
2098                         else
2099                                 DE_ASSERT(false);
2100
2101                         success = compareTessCoords(log, m_primitiveType, tessCoordsRef, tfResult.varying) && success;
2102                 }
2103
2104                 if (!success)
2105                         break;
2106                 else
2107                         log << TestLog::Message << "All OK" << TestLog::EndMessage;
2108         }
2109
2110         m_testCtx.setTestResult(success ? QP_TEST_RESULT_PASS : QP_TEST_RESULT_FAIL, success ? "Pass" : "Invalid tessellation coordinates");
2111         return STOP;
2112 }
2113
2114 // Check validity of fractional spacing modes. Draws a single isoline, reads tesscoords with transform feedback.
2115 class FractionalSpacingModeCase : public TestCase
2116 {
2117 public:
2118                                         FractionalSpacingModeCase (Context& context, const char* name, const char* description, SpacingMode spacing)
2119                                                 : TestCase      (context, name, description)
2120                                                 , m_spacing     (spacing)
2121                                         {
2122                                                 DE_ASSERT(m_spacing == SPACINGMODE_FRACTIONAL_EVEN || m_spacing == SPACINGMODE_FRACTIONAL_ODD);
2123                                         }
2124
2125         void                    init            (void);
2126         void                    deinit          (void);
2127         IterateResult   iterate         (void);
2128
2129 private:
2130         static const int                                RENDER_SIZE = 16;
2131
2132         static vector<float>                    genTessLevelCases (void);
2133
2134         const SpacingMode                               m_spacing;
2135
2136         SharedPtr<const ShaderProgram>  m_program;
2137 };
2138
2139 void FractionalSpacingModeCase::init (void)
2140 {
2141         checkTessellationSupport(m_context);
2142         checkRenderTargetSize(m_context.getRenderTarget(), RENDER_SIZE);
2143
2144         std::string vertexShaderTemplate                        ("${GLSL_VERSION_DECL}\n"
2145                                                                                                          "\n"
2146                                                                                                          "void main (void)\n"
2147                                                                                                          "{\n"
2148                                                                                                  "}\n");
2149         std::string tessellationControlTemplate         ("${GLSL_VERSION_DECL}\n"
2150                                                                                                  "${TESSELLATION_SHADER_REQUIRE}\n"
2151                                                                                                          "\n"
2152                                                                                                          "layout (vertices = 1) out;\n"
2153                                                                                                          "\n"
2154                                                                                                          "uniform mediump float u_tessLevelOuter1;\n"
2155                                                                                                          "\n"
2156                                                                                                          "void main (void)\n"
2157                                                                                                          "{\n"
2158                                                                                                          "      gl_TessLevelOuter[0] = 1.0;\n"
2159                                                                                                          "      gl_TessLevelOuter[1] = u_tessLevelOuter1;\n"
2160                                                                                                  "}\n");
2161         std::string tessellationEvaluationTemplate      ("${GLSL_VERSION_DECL}\n"
2162                                                                                                  "${TESSELLATION_SHADER_REQUIRE}\n"
2163                                                                                                          "\n"
2164                                                                                                          + getTessellationEvaluationInLayoutString(TESSPRIMITIVETYPE_ISOLINES, m_spacing, true) +
2165                                                                                                          "\n"
2166                                                                                                          "out highp float out_te_tessCoord;\n"
2167                                                                                                          "\n"
2168                                                                                                          "void main (void)\n"
2169                                                                                                          "{\n"
2170                                                                                                          "      out_te_tessCoord = gl_TessCoord.x;\n"
2171                                                                                                          "      gl_Position = vec4(gl_TessCoord.xy*1.6 - 0.8, 0.0, 1.0);\n"
2172                                                                                                  "}\n");
2173         std::string fragmentShaderTemplate                      ("${GLSL_VERSION_DECL}\n"
2174                                                                                                          "\n"
2175                                                                                                          "layout (location = 0) out mediump vec4 o_color;\n"
2176                                                                                                          "\n"
2177                                                                                                          "void main (void)\n"
2178                                                                                                          "{\n"
2179                                                                                                          "      o_color = vec4(1.0);\n"
2180                                                                                                  "}\n");
2181
2182         m_program = SharedPtr<const ShaderProgram>(new ShaderProgram(m_context.getRenderContext(), glu::ProgramSources()
2183                         << glu::VertexSource                                    (specializeShader(m_context, vertexShaderTemplate.c_str()))
2184                         << glu::TessellationControlSource               (specializeShader(m_context, tessellationControlTemplate.c_str()))
2185                         << glu::TessellationEvaluationSource    (specializeShader(m_context, tessellationEvaluationTemplate.c_str()))
2186                         << glu::FragmentSource                                  (specializeShader(m_context, fragmentShaderTemplate.c_str()))
2187                         << glu::TransformFeedbackVarying                ("out_te_tessCoord")
2188                         << glu::TransformFeedbackMode                   (GL_INTERLEAVED_ATTRIBS)));
2189
2190         m_testCtx.getLog() << *m_program;
2191         if (!m_program->isOk())
2192                 TCU_FAIL("Program compilation failed");
2193 }
2194
2195 void FractionalSpacingModeCase::deinit (void)
2196 {
2197         m_program.clear();
2198 }
2199
2200 vector<float> FractionalSpacingModeCase::genTessLevelCases (void)
2201 {
2202         vector<float> result;
2203
2204         // Ranges [7.0 .. 8.0), [8.0 .. 9.0) and [9.0 .. 10.0)
2205         {
2206                 static const float      rangeStarts[]           = { 7.0f, 8.0f, 9.0f };
2207                 const int                       numSamplesPerRange      = 10;
2208
2209                 for (int rangeNdx = 0; rangeNdx < DE_LENGTH_OF_ARRAY(rangeStarts); rangeNdx++)
2210                         for (int i = 0; i < numSamplesPerRange; i++)
2211                                 result.push_back(rangeStarts[rangeNdx] + (float)i/(float)numSamplesPerRange);
2212         }
2213
2214         // 0.3, 1.3, 2.3,  ... , 62.3
2215         for (int i = 0; i <= 62; i++)
2216                 result.push_back((float)i + 0.3f);
2217
2218         return result;
2219 }
2220
2221 FractionalSpacingModeCase::IterateResult FractionalSpacingModeCase::iterate (void)
2222 {
2223         typedef TransformFeedbackHandler<float> TFHandler;
2224
2225         TestLog&                                                log                                                     = m_testCtx.getLog();
2226         const RenderContext&                    renderCtx                                       = m_context.getRenderContext();
2227         const RandomViewport                    viewport                                        (renderCtx.getRenderTarget(), RENDER_SIZE, RENDER_SIZE, deStringHash(getName()));
2228         const deUint32                                  programGL                                       = m_program->getProgram();
2229         const glw::Functions&                   gl                                                      = renderCtx.getFunctions();
2230
2231         const int                                               tessLevelOuter1Loc                      = gl.getUniformLocation(programGL, "u_tessLevelOuter1");
2232
2233         // Second outer tessellation levels.
2234         const vector<float>                             tessLevelCases                          = genTessLevelCases();
2235         const int                                               maxNumVertices                          = 1 + getClampedRoundedTessLevel(m_spacing, *std::max_element(tessLevelCases.begin(), tessLevelCases.end()));
2236         vector<float>                                   additionalSegmentLengths;
2237         vector<int>                                             additionalSegmentLocations;
2238
2239         const TFHandler                                 tfHandler                                       (m_context.getRenderContext(), maxNumVertices);
2240
2241         bool                                                    success                                         = true;
2242
2243         setViewport(gl, viewport);
2244         gl.useProgram(programGL);
2245
2246         gl.patchParameteri(GL_PATCH_VERTICES, 1);
2247
2248         for (int tessLevelCaseNdx = 0; tessLevelCaseNdx < (int)tessLevelCases.size(); tessLevelCaseNdx++)
2249         {
2250                 const float outerLevel1 = tessLevelCases[tessLevelCaseNdx];
2251
2252                 gl.uniform1f(tessLevelOuter1Loc, outerLevel1);
2253                 GLU_EXPECT_NO_ERROR(gl.getError(), "Setup failed");
2254
2255                 {
2256                         const TFHandler::Result         tfResult = tfHandler.renderAndGetPrimitives(programGL, GL_POINTS, 0, DE_NULL, 1);
2257                         float                                           additionalSegmentLength;
2258                         int                                                     additionalSegmentLocation;
2259
2260                         success = verifyFractionalSpacingSingle(log, m_spacing, outerLevel1, tfResult.varying,
2261                                                                                                         additionalSegmentLength, additionalSegmentLocation);
2262
2263                         if (!success)
2264                                 break;
2265
2266                         additionalSegmentLengths.push_back(additionalSegmentLength);
2267                         additionalSegmentLocations.push_back(additionalSegmentLocation);
2268                 }
2269         }
2270
2271         if (success)
2272                 success = verifyFractionalSpacingMultiple(log, m_spacing, tessLevelCases, additionalSegmentLengths, additionalSegmentLocations);
2273
2274         m_testCtx.setTestResult(success ? QP_TEST_RESULT_PASS : QP_TEST_RESULT_FAIL, success ? "Pass" : "Invalid tessellation coordinates");
2275         return STOP;
2276 }
2277
2278 // Base class for a case with one input attribute (in_v_position) and optionally a TCS; tests with a couple of different sets of tessellation levels.
2279 class BasicVariousTessLevelsPosAttrCase : public TestCase
2280 {
2281 public:
2282                                         BasicVariousTessLevelsPosAttrCase (Context&                             context,
2283                                                                                                            const char*                  name,
2284                                                                                                            const char*                  description,
2285                                                                                                            TessPrimitiveType    primitiveType,
2286                                                                                                            SpacingMode                  spacing,
2287                                                                                                            const char*                  referenceImagePathPrefix)
2288                                                 : TestCase                                              (context, name, description)
2289                                                 , m_primitiveType                               (primitiveType)
2290                                                 , m_spacing                                             (spacing)
2291                                                 , m_referenceImagePathPrefix    (referenceImagePathPrefix)
2292                                         {
2293                                         }
2294
2295         void                    init                    (void);
2296         void                    deinit                  (void);
2297         IterateResult   iterate                 (void);
2298
2299 protected:
2300         virtual const glu::ProgramSources       makeSources (TessPrimitiveType, SpacingMode, const char* vtxOutPosAttrName) const = DE_NULL;
2301
2302 private:
2303         static const int                                        RENDER_SIZE = 256;
2304
2305         const TessPrimitiveType                         m_primitiveType;
2306         const SpacingMode                                       m_spacing;
2307         const string                                            m_referenceImagePathPrefix;
2308
2309         SharedPtr<const ShaderProgram>          m_program;
2310 };
2311
2312 void BasicVariousTessLevelsPosAttrCase::init (void)
2313 {
2314         checkTessellationSupport(m_context);
2315         checkRenderTargetSize(m_context.getRenderTarget(), RENDER_SIZE);
2316
2317         {
2318                 glu::ProgramSources sources = makeSources(m_primitiveType, m_spacing, "in_tc_position");
2319                 DE_ASSERT(sources.sources[glu::SHADERTYPE_TESSELLATION_CONTROL].empty());
2320
2321                 std::string tessellationControlTemplate         ("${GLSL_VERSION_DECL}\n"
2322                                                                                                          "${TESSELLATION_SHADER_REQUIRE}\n"
2323                                                                                                         "\n"
2324                                                                                                         "layout (vertices = " + string(m_primitiveType == TESSPRIMITIVETYPE_TRIANGLES ? "3" : "4") + ") out;\n"
2325                                                                                                         "\n"
2326                                                                                                         "in highp vec2 in_tc_position[];\n"
2327                                                                                                         "\n"
2328                                                                                                         "out highp vec2 in_te_position[];\n"
2329                                                                                                         "\n"
2330                                                                                                         "uniform mediump float u_tessLevelInner0;\n"
2331                                                                                                         "uniform mediump float u_tessLevelInner1;\n"
2332                                                                                                         "uniform mediump float u_tessLevelOuter0;\n"
2333                                                                                                         "uniform mediump float u_tessLevelOuter1;\n"
2334                                                                                                         "uniform mediump float u_tessLevelOuter2;\n"
2335                                                                                                         "uniform mediump float u_tessLevelOuter3;\n"
2336                                                                                                         "\n"
2337                                                                                                         "void main (void)\n"
2338                                                                                                         "{\n"
2339                                                                                                         "       in_te_position[gl_InvocationID] = in_tc_position[gl_InvocationID];\n"
2340                                                                                                         "\n"
2341                                                                                                         "       gl_TessLevelInner[0] = u_tessLevelInner0;\n"
2342                                                                                                         "       gl_TessLevelInner[1] = u_tessLevelInner1;\n"
2343                                                                                                         "\n"
2344                                                                                                         "       gl_TessLevelOuter[0] = u_tessLevelOuter0;\n"
2345                                                                                                         "       gl_TessLevelOuter[1] = u_tessLevelOuter1;\n"
2346                                                                                                         "       gl_TessLevelOuter[2] = u_tessLevelOuter2;\n"
2347                                                                                                         "       gl_TessLevelOuter[3] = u_tessLevelOuter3;\n"
2348                                                                                                         "}\n");
2349
2350                 sources << glu::TessellationControlSource(specializeShader(m_context, tessellationControlTemplate.c_str()));
2351
2352                 m_program = SharedPtr<const ShaderProgram>(new glu::ShaderProgram(m_context.getRenderContext(), sources));
2353         }
2354
2355         m_testCtx.getLog() << *m_program;
2356         if (!m_program->isOk())
2357                 TCU_FAIL("Program compilation failed");
2358 }
2359
2360 void BasicVariousTessLevelsPosAttrCase::deinit (void)
2361 {
2362         m_program.clear();
2363 }
2364
2365 BasicVariousTessLevelsPosAttrCase::IterateResult BasicVariousTessLevelsPosAttrCase::iterate (void)
2366 {
2367         static const struct
2368         {
2369                 float inner[2];
2370                 float outer[4];
2371         } tessLevelCases[] =
2372         {
2373                 { { 9.0f,       9.0f    },      { 9.0f,         9.0f,   9.0f,   9.0f    } },
2374                 { { 8.0f,       11.0f   },      { 13.0f,        15.0f,  18.0f,  21.0f   } },
2375                 { { 17.0f,      14.0f   },      { 3.0f,         6.0f,   9.0f,   12.0f   } }
2376         };
2377
2378         TestLog&                                log                                     = m_testCtx.getLog();
2379         const RenderContext&    renderCtx                       = m_context.getRenderContext();
2380         const RandomViewport    viewport                        (renderCtx.getRenderTarget(), RENDER_SIZE, RENDER_SIZE, deStringHash(getName()));
2381         const deUint32                  programGL                       = m_program->getProgram();
2382         const glw::Functions&   gl                                      = renderCtx.getFunctions();
2383         const int                               patchSize                       = m_primitiveType == TESSPRIMITIVETYPE_TRIANGLES        ? 3
2384                                                                                                 : m_primitiveType == TESSPRIMITIVETYPE_QUADS            ? 4
2385                                                                                                 : m_primitiveType == TESSPRIMITIVETYPE_ISOLINES         ? 4
2386                                                                                                 : -1;
2387
2388         setViewport(gl, viewport);
2389         gl.clearColor(0.0f, 0.0f, 0.0f, 1.0f);
2390         gl.useProgram(programGL);
2391
2392         gl.patchParameteri(GL_PATCH_VERTICES, patchSize);
2393
2394         for (int tessLevelCaseNdx = 0; tessLevelCaseNdx < DE_LENGTH_OF_ARRAY(tessLevelCases); tessLevelCaseNdx++)
2395         {
2396                 float innerLevels[2];
2397                 float outerLevels[4];
2398
2399                 for (int i = 0; i < DE_LENGTH_OF_ARRAY(innerLevels); i++)
2400                         innerLevels[i] = (float)getClampedRoundedTessLevel(m_spacing, tessLevelCases[tessLevelCaseNdx].inner[i]);
2401
2402                 for (int i = 0; i < DE_LENGTH_OF_ARRAY(outerLevels); i++)
2403                         outerLevels[i] = (float)getClampedRoundedTessLevel(m_spacing, tessLevelCases[tessLevelCaseNdx].outer[i]);
2404
2405                 log << TestLog::Message << "Tessellation levels: " << tessellationLevelsString(&innerLevels[0], &outerLevels[0], m_primitiveType) << TestLog::EndMessage;
2406
2407                 gl.uniform1f(gl.getUniformLocation(programGL, "u_tessLevelInner0"), innerLevels[0]);
2408                 gl.uniform1f(gl.getUniformLocation(programGL, "u_tessLevelInner1"), innerLevels[1]);
2409                 gl.uniform1f(gl.getUniformLocation(programGL, "u_tessLevelOuter0"), outerLevels[0]);
2410                 gl.uniform1f(gl.getUniformLocation(programGL, "u_tessLevelOuter1"), outerLevels[1]);
2411                 gl.uniform1f(gl.getUniformLocation(programGL, "u_tessLevelOuter2"), outerLevels[2]);
2412                 gl.uniform1f(gl.getUniformLocation(programGL, "u_tessLevelOuter3"), outerLevels[3]);
2413
2414                 gl.clear(GL_COLOR_BUFFER_BIT);
2415
2416                 {
2417                         vector<Vec2> positions;
2418                         positions.reserve(4);
2419
2420                         if (m_primitiveType == TESSPRIMITIVETYPE_TRIANGLES)
2421                         {
2422                                 positions.push_back(Vec2( 0.8f,    0.6f));
2423                                 positions.push_back(Vec2( 0.0f, -0.786f));
2424                                 positions.push_back(Vec2(-0.8f,    0.6f));
2425                         }
2426                         else if (m_primitiveType == TESSPRIMITIVETYPE_QUADS || m_primitiveType == TESSPRIMITIVETYPE_ISOLINES)
2427                         {
2428                                 positions.push_back(Vec2(-0.8f, -0.8f));
2429                                 positions.push_back(Vec2( 0.8f, -0.8f));
2430                                 positions.push_back(Vec2(-0.8f,  0.8f));
2431                                 positions.push_back(Vec2( 0.8f,  0.8f));
2432                         }
2433                         else
2434                                 DE_ASSERT(false);
2435
2436                         DE_ASSERT((int)positions.size() == patchSize);
2437
2438                         const glu::VertexArrayBinding attrBindings[] =
2439                         {
2440                                 glu::va::Float("in_v_position", 2, (int)positions.size(), 0, &positions[0].x())
2441                         };
2442
2443                         glu::draw(m_context.getRenderContext(), programGL, DE_LENGTH_OF_ARRAY(attrBindings), &attrBindings[0],
2444                                 glu::pr::Patches(patchSize));
2445                         GLU_EXPECT_NO_ERROR(gl.getError(), "Draw failed");
2446                 }
2447
2448                 {
2449                         const tcu::Surface                      rendered        = getPixels(renderCtx, viewport);
2450                         const tcu::TextureLevel         reference       = getPNG(m_testCtx.getArchive(), m_referenceImagePathPrefix + "_" + de::toString(tessLevelCaseNdx) + ".png");
2451                         const bool                                      success         = tcu::fuzzyCompare(log, "ImageComparison", "Image Comparison", reference.getAccess(), rendered.getAccess(), 0.002f, tcu::COMPARE_LOG_RESULT);
2452
2453                         if (!success)
2454                         {
2455                                 m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "Image comparison failed");
2456                                 return STOP;
2457                         }
2458                 }
2459         }
2460
2461         m_testCtx.setTestResult(QP_TEST_RESULT_PASS, "Pass");
2462         return STOP;
2463 }
2464
2465 // Test that there are no obvious gaps in the triangulation of a tessellated triangle or quad.
2466 class BasicTriangleFillCoverCase : public BasicVariousTessLevelsPosAttrCase
2467 {
2468 public:
2469         BasicTriangleFillCoverCase (Context& context, const char* name, const char* description, TessPrimitiveType primitiveType, SpacingMode spacing, const char* referenceImagePathPrefix)
2470                 : BasicVariousTessLevelsPosAttrCase (context, name, description, primitiveType, spacing, referenceImagePathPrefix)
2471         {
2472                 DE_ASSERT(primitiveType == TESSPRIMITIVETYPE_TRIANGLES || primitiveType == TESSPRIMITIVETYPE_QUADS);
2473         }
2474
2475 protected:
2476         void init (void)
2477         {
2478                 checkGPUShader5Support(m_context);
2479                 BasicVariousTessLevelsPosAttrCase::init();
2480         }
2481
2482         const glu::ProgramSources makeSources (TessPrimitiveType primitiveType, SpacingMode spacing, const char* vtxOutPosAttrName) const
2483         {
2484                 std::string vertexShaderTemplate                        ("${GLSL_VERSION_DECL}\n"
2485                                                                                                          "\n"
2486                                                                                                          "in highp vec2 in_v_position;\n"
2487                                                                                                          "\n"
2488                                                                                                          "out highp vec2 " + string(vtxOutPosAttrName) + ";\n"
2489                                                                                                          "\n"
2490                                                                                                          "void main (void)\n"
2491                                                                                                          "{\n"
2492                                                                                                          "      " + vtxOutPosAttrName + " = in_v_position;\n"
2493                                                                                                          "}\n");
2494                 std::string tessellationEvaluationTemplate      ("${GLSL_VERSION_DECL}\n"
2495                                                                                                          "${TESSELLATION_SHADER_REQUIRE}\n"
2496                                                                                                          "${GPU_SHADER5_REQUIRE}\n"
2497                                                                                                          "\n"
2498                                                                                                          + getTessellationEvaluationInLayoutString(primitiveType, spacing) +
2499                                                                                                          "\n"
2500                                                                                                          "in highp vec2 in_te_position[];\n"
2501                                                                                                          "\n"
2502                                                                                                          "precise gl_Position;\n"
2503                                                                                                          "void main (void)\n"
2504                                                                                                          "{\n"
2505                                                                                                          + (primitiveType == TESSPRIMITIVETYPE_TRIANGLES ?
2506                                                                                                                 "\n"
2507                                                                                                                 "       highp float d = 3.0 * min(gl_TessCoord.x, min(gl_TessCoord.y, gl_TessCoord.z));\n"
2508                                                                                                                 "       highp vec2 corner0 = in_te_position[0];\n"
2509                                                                                                                 "       highp vec2 corner1 = in_te_position[1];\n"
2510                                                                                                                 "       highp vec2 corner2 = in_te_position[2];\n"
2511                                                                                                                 "       highp vec2 pos =  corner0*gl_TessCoord.x + corner1*gl_TessCoord.y + corner2*gl_TessCoord.z;\n"
2512                                                                                                                 "       highp vec2 fromCenter = pos - (corner0 + corner1 + corner2) / 3.0;\n"
2513                                                                                                                 "       highp float f = (1.0 - length(fromCenter)) * (1.5 - d);\n"
2514                                                                                                                 "       pos += 0.75 * f * fromCenter / (length(fromCenter) + 0.3);\n"
2515                                                                                                                 "       gl_Position = vec4(pos, 0.0, 1.0);\n"
2516                                                                                                           : primitiveType == TESSPRIMITIVETYPE_QUADS ?
2517                                                                                                                 "       highp vec2 corner0 = in_te_position[0];\n"
2518                                                                                                                 "       highp vec2 corner1 = in_te_position[1];\n"
2519                                                                                                                 "       highp vec2 corner2 = in_te_position[2];\n"
2520                                                                                                                 "       highp vec2 corner3 = in_te_position[3];\n"
2521                                                                                                                 "       highp vec2 pos = (1.0-gl_TessCoord.x)*(1.0-gl_TessCoord.y)*corner0\n"
2522                                                                                                                 "                      + (    gl_TessCoord.x)*(1.0-gl_TessCoord.y)*corner1\n"
2523                                                                                                                 "                      + (1.0-gl_TessCoord.x)*(    gl_TessCoord.y)*corner2\n"
2524                                                                                                                 "                      + (    gl_TessCoord.x)*(    gl_TessCoord.y)*corner3;\n"
2525                                                                                                                 "       highp float d = 2.0 * min(abs(gl_TessCoord.x-0.5), abs(gl_TessCoord.y-0.5));\n"
2526                                                                                                                 "       highp vec2 fromCenter = pos - (corner0 + corner1 + corner2 + corner3) / 4.0;\n"
2527                                                                                                                 "       highp float f = (1.0 - length(fromCenter)) * sqrt(1.7 - d);\n"
2528                                                                                                                 "       pos += 0.75 * f * fromCenter / (length(fromCenter) + 0.3);\n"
2529                                                                                                                 "       gl_Position = vec4(pos, 0.0, 1.0);\n"
2530                                                                                                           : DE_NULL) +
2531                                                                                                          "}\n");
2532                 std::string fragmentShaderTemplate                      ("${GLSL_VERSION_DECL}\n"
2533                                                                                                          "\n"
2534                                                                                                          "layout (location = 0) out mediump vec4 o_color;\n"
2535                                                                                                          "\n"
2536                                                                                                          "void main (void)\n"
2537                                                                                                          "{\n"
2538                                                                                                          "      o_color = vec4(1.0);\n"
2539                                                                                                          "}\n");
2540
2541                 return glu::ProgramSources()
2542                         << glu::VertexSource                                    (specializeShader(m_context, vertexShaderTemplate.c_str()))
2543                         << glu::TessellationEvaluationSource    (specializeShader(m_context, tessellationEvaluationTemplate.c_str()))
2544                         << glu::FragmentSource                                  (specializeShader(m_context, fragmentShaderTemplate.c_str()));
2545         }
2546 };
2547
2548 // Check that there are no obvious overlaps in the triangulation of a tessellated triangle or quad.
2549 class BasicTriangleFillNonOverlapCase : public BasicVariousTessLevelsPosAttrCase
2550 {
2551 public:
2552         BasicTriangleFillNonOverlapCase (Context& context, const char* name, const char* description, TessPrimitiveType primitiveType, SpacingMode spacing, const char* referenceImagePathPrefix)
2553                 : BasicVariousTessLevelsPosAttrCase (context, name, description, primitiveType, spacing, referenceImagePathPrefix)
2554         {
2555                 DE_ASSERT(primitiveType == TESSPRIMITIVETYPE_TRIANGLES || primitiveType == TESSPRIMITIVETYPE_QUADS);
2556         }
2557
2558 protected:
2559         const glu::ProgramSources makeSources (TessPrimitiveType primitiveType, SpacingMode spacing, const char* vtxOutPosAttrName) const
2560         {
2561                 std::string vertexShaderTemplate                        ("${GLSL_VERSION_DECL}\n"
2562                                                                                                          "\n"
2563                                                                                                          "in highp vec2 in_v_position;\n"
2564                                                                                                          "\n"
2565                                                                                                          "out highp vec2 " + string(vtxOutPosAttrName) + ";\n"
2566                                                                                                          "\n"
2567                                                                                                          "void main (void)\n"
2568                                                                                                          "{\n"
2569                                                                                                          "      " + vtxOutPosAttrName + " = in_v_position;\n"
2570                                                                                                          "}\n");
2571                 std::string tessellationEvaluationTemplate      ("${GLSL_VERSION_DECL}\n"
2572                                                                                                          "${TESSELLATION_SHADER_REQUIRE}\n"
2573                                                                                                          "\n"
2574                                                                                                          + getTessellationEvaluationInLayoutString(primitiveType, spacing) +
2575                                                                                                          "\n"
2576                                                                                                          "in highp vec2 in_te_position[];\n"
2577                                                                                                          "\n"
2578                                                                                                          "out mediump vec4 in_f_color;\n"
2579                                                                                                          "\n"
2580                                                                                                          "uniform mediump float u_tessLevelInner0;\n"
2581                                                                                                          "uniform mediump float u_tessLevelInner1;\n"
2582                                                                                                          "\n"
2583                                                                                                          "void main (void)\n"
2584                                                                                                          "{\n"
2585                                                                                                          + (primitiveType == TESSPRIMITIVETYPE_TRIANGLES ?
2586                                                                                                                 "\n"
2587                                                                                                                 "       highp vec2 corner0 = in_te_position[0];\n"
2588                                                                                                                 "       highp vec2 corner1 = in_te_position[1];\n"
2589                                                                                                                 "       highp vec2 corner2 = in_te_position[2];\n"
2590                                                                                                                 "       highp vec2 pos =  corner0*gl_TessCoord.x + corner1*gl_TessCoord.y + corner2*gl_TessCoord.z;\n"
2591                                                                                                                 "       gl_Position = vec4(pos, 0.0, 1.0);\n"
2592                                                                                                                 "       highp int numConcentricTriangles = int(round(u_tessLevelInner0)) / 2 + 1;\n"
2593                                                                                                                 "       highp float d = 3.0 * min(gl_TessCoord.x, min(gl_TessCoord.y, gl_TessCoord.z));\n"
2594                                                                                                                 "       highp int phase = int(d*float(numConcentricTriangles)) % 3;\n"
2595                                                                                                                 "       in_f_color = phase == 0 ? vec4(1.0, 0.0, 0.0, 1.0)\n"
2596                                                                                                                 "                  : phase == 1 ? vec4(0.0, 1.0, 0.0, 1.0)\n"
2597                                                                                                                 "                  :              vec4(0.0, 0.0, 1.0, 1.0);\n"
2598                                                                                                           : primitiveType == TESSPRIMITIVETYPE_QUADS ?
2599                                                                                                                 "       highp vec2 corner0 = in_te_position[0];\n"
2600                                                                                                                 "       highp vec2 corner1 = in_te_position[1];\n"
2601                                                                                                                 "       highp vec2 corner2 = in_te_position[2];\n"
2602                                                                                                                 "       highp vec2 corner3 = in_te_position[3];\n"
2603                                                                                                                 "       highp vec2 pos = (1.0-gl_TessCoord.x)*(1.0-gl_TessCoord.y)*corner0\n"
2604                                                                                                                 "                      + (    gl_TessCoord.x)*(1.0-gl_TessCoord.y)*corner1\n"
2605                                                                                                                 "                      + (1.0-gl_TessCoord.x)*(    gl_TessCoord.y)*corner2\n"
2606                                                                                                                 "                      + (    gl_TessCoord.x)*(    gl_TessCoord.y)*corner3;\n"
2607                                                                                                                 "       gl_Position = vec4(pos, 0.0, 1.0);\n"
2608                                                                                                                 "       highp int phaseX = int(round((0.5 - abs(gl_TessCoord.x-0.5)) * u_tessLevelInner0));\n"
2609                                                                                                                 "       highp int phaseY = int(round((0.5 - abs(gl_TessCoord.y-0.5)) * u_tessLevelInner1));\n"
2610                                                                                                                 "       highp int phase = min(phaseX, phaseY) % 3;\n"
2611                                                                                                                 "       in_f_color = phase == 0 ? vec4(1.0, 0.0, 0.0, 1.0)\n"
2612                                                                                                                 "                  : phase == 1 ? vec4(0.0, 1.0, 0.0, 1.0)\n"
2613                                                                                                                 "                  :              vec4(0.0, 0.0, 1.0, 1.0);\n"
2614                                                                                                           : DE_NULL) +
2615                                                                                                          "}\n");
2616                 std::string fragmentShaderTemplate                      ("${GLSL_VERSION_DECL}\n"
2617                                                                                                          "\n"
2618                                                                                                          "layout (location = 0) out mediump vec4 o_color;\n"
2619                                                                                                          "\n"
2620                                                                                                          "in mediump vec4 in_f_color;\n"
2621                                                                                                          "\n"
2622                                                                                                          "void main (void)\n"
2623                                                                                                          "{\n"
2624                                                                                                          "      o_color = in_f_color;\n"
2625                                                                                                          "}\n");
2626
2627                 return glu::ProgramSources()
2628                         << glu::VertexSource                                    (specializeShader(m_context, vertexShaderTemplate.c_str()))
2629                         << glu::TessellationEvaluationSource    (specializeShader(m_context, tessellationEvaluationTemplate.c_str()))
2630                         << glu::FragmentSource                                  (specializeShader(m_context, fragmentShaderTemplate.c_str()));
2631         }
2632 };
2633
2634 // Basic isolines rendering case.
2635 class IsolinesRenderCase : public BasicVariousTessLevelsPosAttrCase
2636 {
2637 public:
2638         IsolinesRenderCase (Context& context, const char* name, const char* description, SpacingMode spacing, const char* referenceImagePathPrefix)
2639                 : BasicVariousTessLevelsPosAttrCase (context, name, description, TESSPRIMITIVETYPE_ISOLINES, spacing, referenceImagePathPrefix)
2640         {
2641         }
2642
2643 protected:
2644         const glu::ProgramSources makeSources (TessPrimitiveType primitiveType, SpacingMode spacing, const char* vtxOutPosAttrName) const
2645         {
2646                 DE_ASSERT(primitiveType == TESSPRIMITIVETYPE_ISOLINES);
2647                 DE_UNREF(primitiveType);
2648
2649                 std::string vertexShaderTemplate                        ("${GLSL_VERSION_DECL}\n"
2650                                                                                                          "\n"
2651                                                                                                          "in highp vec2 in_v_position;\n"
2652                                                                                                          "\n"
2653                                                                                                          "out highp vec2 " + string(vtxOutPosAttrName) + ";\n"
2654                                                                                                          "\n"
2655                                                                                                          "void main (void)\n"
2656                                                                                                          "{\n"
2657                                                                                                          "      " + vtxOutPosAttrName + " = in_v_position;\n"
2658                                                                                                          "}\n");
2659                 std::string tessellationEvaluationTemplate      ("${GLSL_VERSION_DECL}\n"
2660                                                                                                          "${TESSELLATION_SHADER_REQUIRE}\n"
2661                                                                                                          "\n"
2662                                                                                                          + getTessellationEvaluationInLayoutString(TESSPRIMITIVETYPE_ISOLINES, spacing) +
2663                                                                                                          "\n"
2664                                                                                                          "in highp vec2 in_te_position[];\n"
2665                                                                                                          "\n"
2666                                                                                                          "out mediump vec4 in_f_color;\n"
2667                                                                                                          "\n"
2668                                                                                                          "uniform mediump float u_tessLevelOuter0;\n"
2669                                                                                                          "uniform mediump float u_tessLevelOuter1;\n"
2670                                                                                                          "\n"
2671                                                                                                          "void main (void)\n"
2672                                                                                                          "{\n"
2673                                                                                                          "      highp vec2 corner0 = in_te_position[0];\n"
2674                                                                                                          "      highp vec2 corner1 = in_te_position[1];\n"
2675                                                                                                          "      highp vec2 corner2 = in_te_position[2];\n"
2676                                                                                                          "      highp vec2 corner3 = in_te_position[3];\n"
2677                                                                                                          "      highp vec2 pos = (1.0-gl_TessCoord.x)*(1.0-gl_TessCoord.y)*corner0\n"
2678                                                                                                          "                     + (    gl_TessCoord.x)*(1.0-gl_TessCoord.y)*corner1\n"
2679                                                                                                          "                     + (1.0-gl_TessCoord.x)*(    gl_TessCoord.y)*corner2\n"
2680                                                                                                          "                     + (    gl_TessCoord.x)*(    gl_TessCoord.y)*corner3;\n"
2681                                                                                                          "      pos.y += 0.15*sin(gl_TessCoord.x*10.0);\n"
2682                                                                                                          "      gl_Position = vec4(pos, 0.0, 1.0);\n"
2683                                                                                                          "      highp int phaseX = int(round(gl_TessCoord.x*u_tessLevelOuter1));\n"
2684                                                                                                          "      highp int phaseY = int(round(gl_TessCoord.y*u_tessLevelOuter0));\n"
2685                                                                                                          "      highp int phase = (phaseX + phaseY) % 3;\n"
2686                                                                                                          "      in_f_color = phase == 0 ? vec4(1.0, 0.0, 0.0, 1.0)\n"
2687                                                                                                          "                 : phase == 1 ? vec4(0.0, 1.0, 0.0, 1.0)\n"
2688                                                                                                          "                 :              vec4(0.0, 0.0, 1.0, 1.0);\n"
2689                                                                                                          "}\n");
2690                 std::string fragmentShaderTemplate                      ("${GLSL_VERSION_DECL}\n"
2691                                                                                                          "\n"
2692                                                                                                          "layout (location = 0) out mediump vec4 o_color;\n"
2693                                                                                                          "\n"
2694                                                                                                          "in mediump vec4 in_f_color;\n"
2695                                                                                                          "\n"
2696                                                                                                          "void main (void)\n"
2697                                                                                                          "{\n"
2698                                                                                                          "      o_color = in_f_color;\n"
2699                                                                                                          "}\n");
2700
2701                 return glu::ProgramSources()
2702                                 << glu::VertexSource                                    (specializeShader(m_context, vertexShaderTemplate.c_str()))
2703                                 << glu::TessellationEvaluationSource    (specializeShader(m_context, tessellationEvaluationTemplate.c_str()))
2704                                 << glu::FragmentSource                                  (specializeShader(m_context, fragmentShaderTemplate.c_str()));
2705         }
2706 };
2707
2708 // Test the "cw" and "ccw" TES input layout qualifiers.
2709 class WindingCase : public TestCase
2710 {
2711 public:
2712                                         WindingCase (Context& context, const char* name, const char* description, TessPrimitiveType primitiveType, Winding winding)
2713                                                 : TestCase                      (context, name, description)
2714                                                 , m_primitiveType       (primitiveType)
2715                                                 , m_winding                     (winding)
2716                                         {
2717                                                 DE_ASSERT(primitiveType == TESSPRIMITIVETYPE_TRIANGLES || primitiveType == TESSPRIMITIVETYPE_QUADS);
2718                                         }
2719
2720         void                    init            (void);
2721         void                    deinit          (void);
2722         IterateResult   iterate         (void);
2723
2724 private:
2725         static const int                                RENDER_SIZE = 64;
2726
2727         const TessPrimitiveType                 m_primitiveType;
2728         const Winding                                   m_winding;
2729
2730         SharedPtr<const ShaderProgram>  m_program;
2731 };
2732
2733 void WindingCase::init (void)
2734 {
2735         checkTessellationSupport(m_context);
2736         checkRenderTargetSize(m_context.getRenderTarget(), RENDER_SIZE);
2737
2738         std::string vertexShaderTemplate                        ("${GLSL_VERSION_DECL}\n"
2739                                                                                                          "\n"
2740                                                                                                          "void main (void)\n"
2741                                                                                                          "{\n"
2742                                                                                                  "}\n");
2743         std::string tessellationControlTemplate         ("${GLSL_VERSION_DECL}\n"
2744                                                                                                  "${TESSELLATION_SHADER_REQUIRE}\n"
2745                                                                                                          "\n"
2746                                                                                                          "layout (vertices = 1) out;\n"
2747                                                                                                          "\n"
2748                                                                                                          "void main (void)\n"
2749                                                                                                          "{\n"
2750                                                                                                          "      gl_TessLevelInner[0] = 5.0;\n"
2751                                                                                                          "      gl_TessLevelInner[1] = 5.0;\n"
2752                                                                                                          "\n"
2753                                                                                                          "      gl_TessLevelOuter[0] = 5.0;\n"
2754                                                                                                          "      gl_TessLevelOuter[1] = 5.0;\n"
2755                                                                                                          "      gl_TessLevelOuter[2] = 5.0;\n"
2756                                                                                                          "      gl_TessLevelOuter[3] = 5.0;\n"
2757                                                                                                  "}\n");
2758         std::string tessellationEvaluationTemplate      ("${GLSL_VERSION_DECL}\n"
2759                                                                                                  "${TESSELLATION_SHADER_REQUIRE}\n"
2760                                                                                                          "\n"
2761                                                                                                          + getTessellationEvaluationInLayoutString(m_primitiveType, m_winding) +
2762                                                                                                          "\n"
2763                                                                                                          "void main (void)\n"
2764                                                                                                          "{\n"
2765                                                                                                          "      gl_Position = vec4(gl_TessCoord.xy*2.0 - 1.0, 0.0, 1.0);\n"
2766                                                                                                  "}\n");
2767         std::string fragmentShaderTemplate                      ("${GLSL_VERSION_DECL}\n"
2768                                                                                                          "\n"
2769                                                                                                          "layout (location = 0) out mediump vec4 o_color;\n"
2770                                                                                                          "\n"
2771                                                                                                          "void main (void)\n"
2772                                                                                                          "{\n"
2773                                                                                                          "      o_color = vec4(1.0);\n"
2774                                                                                                  "}\n");
2775
2776         m_program = SharedPtr<const ShaderProgram>(new ShaderProgram(m_context.getRenderContext(), glu::ProgramSources()
2777                         << glu::VertexSource                                    (specializeShader(m_context, vertexShaderTemplate.c_str()))
2778                         << glu::TessellationControlSource               (specializeShader(m_context, tessellationControlTemplate.c_str()))
2779                         << glu::TessellationEvaluationSource    (specializeShader(m_context, tessellationEvaluationTemplate.c_str()))
2780                         << glu::FragmentSource                                  (specializeShader(m_context, fragmentShaderTemplate.c_str()))));
2781
2782         m_testCtx.getLog() << *m_program;
2783         if (!m_program->isOk())
2784                 TCU_FAIL("Program compilation failed");
2785 }
2786
2787 void WindingCase::deinit (void)
2788 {
2789         m_program.clear();
2790 }
2791
2792 WindingCase::IterateResult WindingCase::iterate (void)
2793 {
2794         TestLog&                                                log                                                     = m_testCtx.getLog();
2795         const RenderContext&                    renderCtx                                       = m_context.getRenderContext();
2796         const RandomViewport                    viewport                                        (renderCtx.getRenderTarget(), RENDER_SIZE, RENDER_SIZE, deStringHash(getName()));
2797         const deUint32                                  programGL                                       = m_program->getProgram();
2798         const glw::Functions&                   gl                                                      = renderCtx.getFunctions();
2799         const glu::VertexArray                  vao                                                     (renderCtx);
2800
2801         bool                                                    success                                         = true;
2802
2803         setViewport(gl, viewport);
2804         gl.clearColor(1.0f, 0.0f, 0.0f, 1.0f);
2805         gl.useProgram(programGL);
2806
2807         gl.patchParameteri(GL_PATCH_VERTICES, 1);
2808
2809         gl.enable(GL_CULL_FACE);
2810
2811         gl.bindVertexArray(*vao);
2812
2813         log << TestLog::Message << "Face culling enabled" << TestLog::EndMessage;
2814
2815         for (int frontFaceWinding = 0; frontFaceWinding < WINDING_LAST; frontFaceWinding++)
2816         {
2817                 log << TestLog::Message << "Setting glFrontFace(" << (frontFaceWinding == WINDING_CW ? "GL_CW" : "GL_CCW") << ")" << TestLog::EndMessage;
2818
2819                 gl.frontFace(frontFaceWinding == WINDING_CW ? GL_CW : GL_CCW);
2820
2821                 gl.clear(GL_COLOR_BUFFER_BIT);
2822                 gl.drawArrays(GL_PATCHES, 0, 1);
2823                 GLU_EXPECT_NO_ERROR(gl.getError(), "Draw failed");
2824
2825                 {
2826                         const tcu::Surface rendered = getPixels(renderCtx, viewport);
2827                         log << TestLog::Image("RenderedImage", "Rendered Image", rendered);
2828
2829                         {
2830                                 const int totalNumPixels                = rendered.getWidth()*rendered.getHeight();
2831                                 const int badPixelTolerance             = m_primitiveType == TESSPRIMITIVETYPE_TRIANGLES ? 5*de::max(rendered.getWidth(), rendered.getHeight()) : 0;
2832
2833                                 int numWhitePixels      = 0;
2834                                 int numRedPixels        = 0;
2835                                 for (int y = 0; y < rendered.getHeight();       y++)
2836                                 for (int x = 0; x < rendered.getWidth();        x++)
2837                                 {
2838                                         numWhitePixels  += rendered.getPixel(x, y) == tcu::RGBA::white()        ? 1 : 0;
2839                                         numRedPixels    += rendered.getPixel(x, y) == tcu::RGBA::red()  ? 1 : 0;
2840                                 }
2841
2842                                 DE_ASSERT(numWhitePixels + numRedPixels <= totalNumPixels);
2843
2844                                 log << TestLog::Message << "Note: got " << numWhitePixels << " white and " << numRedPixels << " red pixels" << TestLog::EndMessage;
2845
2846                                 if (totalNumPixels - numWhitePixels - numRedPixels > badPixelTolerance)
2847                                 {
2848                                         log << TestLog::Message << "Failure: Got " << totalNumPixels - numWhitePixels - numRedPixels << " other than white or red pixels (maximum tolerance " << badPixelTolerance << ")" << TestLog::EndMessage;
2849                                         success = false;
2850                                         break;
2851                                 }
2852
2853                                 if ((Winding)frontFaceWinding == m_winding)
2854                                 {
2855                                         if (m_primitiveType == TESSPRIMITIVETYPE_TRIANGLES)
2856                                         {
2857                                                 if (de::abs(numWhitePixels - totalNumPixels/2) > badPixelTolerance)
2858                                                 {
2859                                                         log << TestLog::Message << "Failure: wrong number of white pixels; expected approximately " << totalNumPixels/2 << TestLog::EndMessage;
2860                                                         success = false;
2861                                                         break;
2862                                                 }
2863                                         }
2864                                         else if (m_primitiveType == TESSPRIMITIVETYPE_QUADS)
2865                                         {
2866                                                 if (numWhitePixels != totalNumPixels)
2867                                                 {
2868                                                         log << TestLog::Message << "Failure: expected only white pixels (full-viewport quad)" << TestLog::EndMessage;
2869                                                         success = false;
2870                                                         break;
2871                                                 }
2872                                         }
2873                                         else
2874                                                 DE_ASSERT(false);
2875                                 }
2876                                 else
2877                                 {
2878                                         if (numWhitePixels != 0)
2879                                         {
2880                                                 log << TestLog::Message << "Failure: expected only red pixels (everything culled)" << TestLog::EndMessage;
2881                                                 success = false;
2882                                                 break;
2883                                         }
2884                                 }
2885                         }
2886                 }
2887         }
2888
2889         m_testCtx.setTestResult(success ? QP_TEST_RESULT_PASS : QP_TEST_RESULT_FAIL, success ? "Pass" : "Image verification failed");
2890         return STOP;
2891 }
2892
2893 // Test potentially differing input and output patch sizes.
2894 class PatchVertexCountCase : public TestCase
2895 {
2896 public:
2897         PatchVertexCountCase (Context& context, const char* name, const char* description, int inputPatchSize, int outputPatchSize, const char* referenceImagePath)
2898                 : TestCase                              (context, name, description)
2899                 , m_inputPatchSize              (inputPatchSize)
2900                 , m_outputPatchSize             (outputPatchSize)
2901                 , m_referenceImagePath  (referenceImagePath)
2902         {
2903         }
2904
2905         void                                                    init                            (void);
2906         void                                                    deinit                          (void);
2907         IterateResult                                   iterate                         (void);
2908
2909 private:
2910         static const int                                RENDER_SIZE = 256;
2911
2912         const int                                               m_inputPatchSize;
2913         const int                                               m_outputPatchSize;
2914
2915         const string                                    m_referenceImagePath;
2916
2917         SharedPtr<const ShaderProgram>  m_program;
2918 };
2919
2920 void PatchVertexCountCase::init (void)
2921 {
2922         checkTessellationSupport(m_context);
2923         checkRenderTargetSize(m_context.getRenderTarget(), RENDER_SIZE);
2924
2925         const string inSizeStr          = de::toString(m_inputPatchSize);
2926         const string outSizeStr         = de::toString(m_outputPatchSize);
2927
2928         std::string vertexShaderTemplate                        ("${GLSL_VERSION_DECL}\n"
2929                                                                                                          "\n"
2930                                                                                                          "in highp float in_v_attr;\n"
2931                                                                                                          "\n"
2932                                                                                                          "out highp float in_tc_attr;\n"
2933                                                                                                          "\n"
2934                                                                                                          "void main (void)\n"
2935                                                                                                          "{\n"
2936                                                                                                          "      in_tc_attr = in_v_attr;\n"
2937                                                                                                  "}\n");
2938         std::string tessellationControlTemplate         ("${GLSL_VERSION_DECL}\n"
2939                                                                                                  "${TESSELLATION_SHADER_REQUIRE}\n"
2940                                                                                                          "\n"
2941                                                                                                          "layout (vertices = " + outSizeStr + ") out;\n"
2942                                                                                                          "\n"
2943                                                                                                          "in highp float in_tc_attr[];\n"
2944                                                                                                          "\n"
2945                                                                                                          "out highp float in_te_attr[];\n"
2946                                                                                                          "\n"
2947                                                                                                          "void main (void)\n"
2948                                                                                                          "{\n"
2949                                                                                                          "      in_te_attr[gl_InvocationID] = in_tc_attr[gl_InvocationID*" + inSizeStr + "/" + outSizeStr + "];\n"
2950                                                                                                          "\n"
2951                                                                                                          "      gl_TessLevelInner[0] = 5.0;\n"
2952                                                                                                          "      gl_TessLevelInner[1] = 5.0;\n"
2953                                                                                                          "\n"
2954                                                                                                         "       gl_TessLevelOuter[0] = 5.0;\n"
2955                                                                                                         "       gl_TessLevelOuter[1] = 5.0;\n"
2956                                                                                                         "       gl_TessLevelOuter[2] = 5.0;\n"
2957                                                                                                         "       gl_TessLevelOuter[3] = 5.0;\n"
2958                                                                                                  "}\n");
2959         std::string tessellationEvaluationTemplate      ("${GLSL_VERSION_DECL}\n"
2960                                                                                                  "${TESSELLATION_SHADER_REQUIRE}\n"
2961                                                                                                          "\n"
2962                                                                                                          + getTessellationEvaluationInLayoutString(TESSPRIMITIVETYPE_QUADS) +
2963                                                                                                          "\n"
2964                                                                                                          "in highp float in_te_attr[];\n"
2965                                                                                                          "\n"
2966                                                                                                          "out mediump vec4 in_f_color;\n"
2967                                                                                                          "\n"
2968                                                                                                          "void main (void)\n"
2969                                                                                                          "{\n"
2970                                                                                                          "      highp float x = gl_TessCoord.x*2.0 - 1.0;\n"
2971                                                                                                          "      highp float y = gl_TessCoord.y - in_te_attr[int(round(gl_TessCoord.x*float(" + outSizeStr + "-1)))];\n"
2972                                                                                                          "      gl_Position = vec4(x, y, 0.0, 1.0);\n"
2973                                                                                                          "      in_f_color = vec4(1.0);\n"
2974                                                                                                  "}\n");
2975         std::string fragmentShaderTemplate                      ("${GLSL_VERSION_DECL}\n"
2976                                                                                                          "\n"
2977                                                                                                          "layout (location = 0) out mediump vec4 o_color;\n"
2978                                                                                                          "\n"
2979                                                                                                          "in mediump vec4 in_f_color;\n"
2980                                                                                                          "\n"
2981                                                                                                          "void main (void)\n"
2982                                                                                                          "{\n"
2983                                                                                                          "      o_color = in_f_color;\n"
2984                                                                                                  "}\n");
2985
2986         m_program = SharedPtr<const ShaderProgram>(new ShaderProgram(m_context.getRenderContext(), glu::ProgramSources()
2987                         << glu::VertexSource                                    (specializeShader(m_context, vertexShaderTemplate.c_str()))
2988                         << glu::TessellationControlSource               (specializeShader(m_context, tessellationControlTemplate.c_str()))
2989                         << glu::TessellationEvaluationSource    (specializeShader(m_context, tessellationEvaluationTemplate.c_str()))
2990                         << glu::FragmentSource                                  (specializeShader(m_context, fragmentShaderTemplate.c_str()))));
2991
2992         m_testCtx.getLog() << *m_program;
2993         if (!m_program->isOk())
2994                 TCU_FAIL("Program compilation failed");
2995 }
2996
2997 void PatchVertexCountCase::deinit (void)
2998 {
2999         m_program.clear();
3000 }
3001
3002 PatchVertexCountCase::IterateResult PatchVertexCountCase::iterate (void)
3003 {
3004         TestLog&                                        log                                             = m_testCtx.getLog();
3005         const RenderContext&            renderCtx                               = m_context.getRenderContext();
3006         const RandomViewport            viewport                                (renderCtx.getRenderTarget(), RENDER_SIZE, RENDER_SIZE, deStringHash(getName()));
3007         const deUint32                          programGL                               = m_program->getProgram();
3008         const glw::Functions&           gl                                              = renderCtx.getFunctions();
3009
3010         setViewport(gl, viewport);
3011         gl.clearColor(0.0f, 0.0f, 0.0f, 1.0f);
3012         gl.useProgram(programGL);
3013
3014         log << TestLog::Message << "Note: input patch size is " << m_inputPatchSize << ", output patch size is " << m_outputPatchSize << TestLog::EndMessage;
3015
3016         {
3017                 vector<float> attributeData;
3018                 attributeData.reserve(m_inputPatchSize);
3019
3020                 for (int i = 0; i < m_inputPatchSize; i++)
3021                 {
3022                         const float f = (float)i / (float)(m_inputPatchSize-1);
3023                         attributeData.push_back(f*f);
3024                 }
3025
3026                 gl.patchParameteri(GL_PATCH_VERTICES, m_inputPatchSize);
3027                 gl.clear(GL_COLOR_BUFFER_BIT);
3028
3029                 const glu::VertexArrayBinding attrBindings[] =
3030                 {
3031                         glu::va::Float("in_v_attr", 1, (int)attributeData.size(), 0, &attributeData[0])
3032                 };
3033
3034                 glu::draw(m_context.getRenderContext(), programGL, DE_LENGTH_OF_ARRAY(attrBindings), &attrBindings[0],
3035                         glu::pr::Patches(m_inputPatchSize));
3036                 GLU_EXPECT_NO_ERROR(gl.getError(), "Draw failed");
3037         }
3038
3039         {
3040                 const tcu::Surface                      rendered        = getPixels(renderCtx, viewport);
3041                 const tcu::TextureLevel         reference       = getPNG(m_testCtx.getArchive(), m_referenceImagePath);
3042                 const bool                                      success         = tcu::fuzzyCompare(log, "ImageComparison", "Image Comparison", reference.getAccess(), rendered.getAccess(), 0.02f, tcu::COMPARE_LOG_RESULT);
3043
3044                 m_testCtx.setTestResult(success ? QP_TEST_RESULT_PASS : QP_TEST_RESULT_FAIL, success ? "Pass" : "Image comparison failed");
3045                 return STOP;
3046         }
3047 }
3048
3049 // Test per-patch inputs/outputs.
3050 class PerPatchDataCase : public TestCase
3051 {
3052 public:
3053         enum CaseType
3054         {
3055                 CASETYPE_PRIMITIVE_ID_TCS = 0,
3056                 CASETYPE_PRIMITIVE_ID_TES,
3057                 CASETYPE_PATCH_VERTICES_IN_TCS,
3058                 CASETYPE_PATCH_VERTICES_IN_TES,
3059                 CASETYPE_TESS_LEVEL_INNER0_TES,
3060                 CASETYPE_TESS_LEVEL_INNER1_TES,
3061                 CASETYPE_TESS_LEVEL_OUTER0_TES,
3062                 CASETYPE_TESS_LEVEL_OUTER1_TES,
3063                 CASETYPE_TESS_LEVEL_OUTER2_TES,
3064                 CASETYPE_TESS_LEVEL_OUTER3_TES,
3065
3066                 CASETYPE_LAST
3067         };
3068
3069         PerPatchDataCase (Context& context, const char* name, const char* description, CaseType caseType, const char* referenceImagePath)
3070                 : TestCase                              (context, name, description)
3071                 , m_caseType                    (caseType)
3072                 , m_referenceImagePath  (caseTypeUsesRefImageFromFile(caseType) ? referenceImagePath : "")
3073         {
3074                 DE_ASSERT(caseTypeUsesRefImageFromFile(caseType) == (referenceImagePath != DE_NULL));
3075         }
3076
3077         void                                                    init                                                    (void);
3078         void                                                    deinit                                                  (void);
3079         IterateResult                                   iterate                                                 (void);
3080
3081         static const char*                              getCaseTypeName                                 (CaseType);
3082         static const char*                              getCaseTypeDescription                  (CaseType);
3083         static bool                                             caseTypeUsesRefImageFromFile    (CaseType);
3084
3085 private:
3086         static const int                                RENDER_SIZE = 256;
3087         static const int                                INPUT_PATCH_SIZE;
3088         static const int                                OUTPUT_PATCH_SIZE;
3089
3090         const CaseType                                  m_caseType;
3091         const string                                    m_referenceImagePath;
3092
3093         SharedPtr<const ShaderProgram>  m_program;
3094 };
3095
3096 const int PerPatchDataCase::INPUT_PATCH_SIZE    = 10;
3097 const int PerPatchDataCase::OUTPUT_PATCH_SIZE   = 5;
3098
3099 const char* PerPatchDataCase::getCaseTypeName (CaseType type)
3100 {
3101         switch (type)
3102         {
3103                 case CASETYPE_PRIMITIVE_ID_TCS:                 return "primitive_id_tcs";
3104                 case CASETYPE_PRIMITIVE_ID_TES:                 return "primitive_id_tes";
3105                 case CASETYPE_PATCH_VERTICES_IN_TCS:    return "patch_vertices_in_tcs";
3106                 case CASETYPE_PATCH_VERTICES_IN_TES:    return "patch_vertices_in_tes";
3107                 case CASETYPE_TESS_LEVEL_INNER0_TES:    return "tess_level_inner_0_tes";
3108                 case CASETYPE_TESS_LEVEL_INNER1_TES:    return "tess_level_inner_1_tes";
3109                 case CASETYPE_TESS_LEVEL_OUTER0_TES:    return "tess_level_outer_0_tes";
3110                 case CASETYPE_TESS_LEVEL_OUTER1_TES:    return "tess_level_outer_1_tes";
3111                 case CASETYPE_TESS_LEVEL_OUTER2_TES:    return "tess_level_outer_2_tes";
3112                 case CASETYPE_TESS_LEVEL_OUTER3_TES:    return "tess_level_outer_3_tes";
3113                 default:
3114                         DE_ASSERT(false);
3115                         return DE_NULL;
3116         }
3117 }
3118
3119 const char* PerPatchDataCase::getCaseTypeDescription (CaseType type)
3120 {
3121         switch (type)
3122         {
3123                 case CASETYPE_PRIMITIVE_ID_TCS:                 return "Read gl_PrimitiveID in TCS and pass it as patch output to TES";
3124                 case CASETYPE_PRIMITIVE_ID_TES:                 return "Read gl_PrimitiveID in TES";
3125                 case CASETYPE_PATCH_VERTICES_IN_TCS:    return "Read gl_PatchVerticesIn in TCS and pass it as patch output to TES";
3126                 case CASETYPE_PATCH_VERTICES_IN_TES:    return "Read gl_PatchVerticesIn in TES";
3127                 case CASETYPE_TESS_LEVEL_INNER0_TES:    return "Read gl_TessLevelInner[0] in TES";
3128                 case CASETYPE_TESS_LEVEL_INNER1_TES:    return "Read gl_TessLevelInner[1] in TES";
3129                 case CASETYPE_TESS_LEVEL_OUTER0_TES:    return "Read gl_TessLevelOuter[0] in TES";
3130                 case CASETYPE_TESS_LEVEL_OUTER1_TES:    return "Read gl_TessLevelOuter[1] in TES";
3131                 case CASETYPE_TESS_LEVEL_OUTER2_TES:    return "Read gl_TessLevelOuter[2] in TES";
3132                 case CASETYPE_TESS_LEVEL_OUTER3_TES:    return "Read gl_TessLevelOuter[3] in TES";
3133                 default:
3134                         DE_ASSERT(false);
3135                         return DE_NULL;
3136         }
3137 }
3138
3139 bool PerPatchDataCase::caseTypeUsesRefImageFromFile (CaseType type)
3140 {
3141         switch (type)
3142         {
3143                 case CASETYPE_PRIMITIVE_ID_TCS:
3144                 case CASETYPE_PRIMITIVE_ID_TES:
3145                         return true;
3146
3147                 default:
3148                         return false;
3149         }
3150 }
3151
3152 void PerPatchDataCase::init (void)
3153 {
3154         checkTessellationSupport(m_context);
3155         checkRenderTargetSize(m_context.getRenderTarget(), RENDER_SIZE);
3156
3157         DE_ASSERT(OUTPUT_PATCH_SIZE < INPUT_PATCH_SIZE);
3158
3159         const string inSizeStr          = de::toString(INPUT_PATCH_SIZE);
3160         const string outSizeStr         = de::toString(OUTPUT_PATCH_SIZE);
3161
3162         std::string vertexShaderTemplate                        ("${GLSL_VERSION_DECL}\n"
3163                                                                                                          "\n"
3164                                                                                                          "in highp float in_v_attr;\n"
3165                                                                                                          "\n"
3166                                                                                                          "out highp float in_tc_attr;\n"
3167                                                                                                          "\n"
3168                                                                                                          "void main (void)\n"
3169                                                                                                          "{\n"
3170                                                                                                          "      in_tc_attr = in_v_attr;\n"
3171                                                                                                  "}\n");
3172         std::string tessellationControlTemplate         ("${GLSL_VERSION_DECL}\n"
3173                                                                                                  "${TESSELLATION_SHADER_REQUIRE}\n"
3174                                                                                                          "\n"
3175                                                                                                          "layout (vertices = " + outSizeStr + ") out;\n"
3176                                                                                                          "\n"
3177                                                                                                          "in highp float in_tc_attr[];\n"
3178                                                                                                          "\n"
3179                                                                                                          "out highp float in_te_attr[];\n"
3180                                                                                                          + (m_caseType == CASETYPE_PRIMITIVE_ID_TCS                     ? "patch out mediump int in_te_primitiveIDFromTCS;\n"
3181                                                                                                           : m_caseType == CASETYPE_PATCH_VERTICES_IN_TCS        ? "patch out mediump int in_te_patchVerticesInFromTCS;\n"
3182                                                                                                           : "") +
3183                                                                                                          "\n"
3184                                                                                                          "void main (void)\n"
3185                                                                                                          "{\n"
3186                                                                                                          "      in_te_attr[gl_InvocationID] = in_tc_attr[gl_InvocationID];\n"
3187                                                                                                          + (m_caseType == CASETYPE_PRIMITIVE_ID_TCS                     ? "\tin_te_primitiveIDFromTCS = gl_PrimitiveID;\n"
3188                                                                                                           : m_caseType == CASETYPE_PATCH_VERTICES_IN_TCS        ? "\tin_te_patchVerticesInFromTCS = gl_PatchVerticesIn;\n"
3189                                                                                                           : "") +
3190                                                                                                          "\n"
3191                                                                                                          "      gl_TessLevelInner[0] = 9.0;\n"
3192                                                                                                          "      gl_TessLevelInner[1] = 8.0;\n"
3193                                                                                                          "\n"
3194                                                                                                         "       gl_TessLevelOuter[0] = 7.0;\n"
3195                                                                                                         "       gl_TessLevelOuter[1] = 6.0;\n"
3196                                                                                                         "       gl_TessLevelOuter[2] = 5.0;\n"
3197                                                                                                         "       gl_TessLevelOuter[3] = 4.0;\n"
3198                                                                                                  "}\n");
3199         std::string tessellationEvaluationTemplate      ("${GLSL_VERSION_DECL}\n"
3200                                                                                                  "${TESSELLATION_SHADER_REQUIRE}\n"
3201                                                                                                          "\n"
3202                                                                                                          + getTessellationEvaluationInLayoutString(TESSPRIMITIVETYPE_QUADS) +
3203                                                                                                          "\n"
3204                                                                                                          "in highp float in_te_attr[];\n"
3205                                                                                                          + (m_caseType == CASETYPE_PRIMITIVE_ID_TCS                     ? "patch in mediump int in_te_primitiveIDFromTCS;\n"
3206                                                                                                           : m_caseType == CASETYPE_PATCH_VERTICES_IN_TCS        ? "patch in mediump int in_te_patchVerticesInFromTCS;\n"
3207                                                                                                           : string()) +
3208                                                                                                          "\n"
3209                                                                                                          "out mediump vec4 in_f_color;\n"
3210                                                                                                          "\n"
3211                                                                                                          "uniform highp float u_xScale;\n"
3212                                                                                                          "\n"
3213                                                                                                          "void main (void)\n"
3214                                                                                                          "{\n"
3215                                                                                                          "      highp float x = (gl_TessCoord.x*u_xScale + in_te_attr[0]) * 2.0 - 1.0;\n"
3216                                                                                                          "      highp float y = gl_TessCoord.y*2.0 - 1.0;\n"
3217                                                                                                          "      gl_Position = vec4(x, y, 0.0, 1.0);\n"
3218                                                                                                          + (m_caseType == CASETYPE_PRIMITIVE_ID_TCS                     ? "\tbool ok = in_te_primitiveIDFromTCS == 3;\n"
3219                                                                                                           : m_caseType == CASETYPE_PRIMITIVE_ID_TES                     ? "\tbool ok = gl_PrimitiveID == 3;\n"
3220                                                                                                           : m_caseType == CASETYPE_PATCH_VERTICES_IN_TCS        ? "\tbool ok = in_te_patchVerticesInFromTCS == " + inSizeStr + ";\n"
3221                                                                                                           : m_caseType == CASETYPE_PATCH_VERTICES_IN_TES        ? "\tbool ok = gl_PatchVerticesIn == " + outSizeStr + ";\n"
3222                                                                                                           : m_caseType == CASETYPE_TESS_LEVEL_INNER0_TES        ? "\tbool ok = abs(gl_TessLevelInner[0] - 9.0) < 0.1f;\n"
3223                                                                                                           : m_caseType == CASETYPE_TESS_LEVEL_INNER1_TES        ? "\tbool ok = abs(gl_TessLevelInner[1] - 8.0) < 0.1f;\n"
3224                                                                                                           : m_caseType == CASETYPE_TESS_LEVEL_OUTER0_TES        ? "\tbool ok = abs(gl_TessLevelOuter[0] - 7.0) < 0.1f;\n"
3225                                                                                                           : m_caseType == CASETYPE_TESS_LEVEL_OUTER1_TES        ? "\tbool ok = abs(gl_TessLevelOuter[1] - 6.0) < 0.1f;\n"
3226                                                                                                           : m_caseType == CASETYPE_TESS_LEVEL_OUTER2_TES        ? "\tbool ok = abs(gl_TessLevelOuter[2] - 5.0) < 0.1f;\n"
3227                                                                                                           : m_caseType == CASETYPE_TESS_LEVEL_OUTER3_TES        ? "\tbool ok = abs(gl_TessLevelOuter[3] - 4.0) < 0.1f;\n"
3228                                                                                                           : DE_NULL) +
3229                                                                                                           "     in_f_color = ok ? vec4(1.0) : vec4(vec3(0.0), 1.0);\n"
3230                                                                                                  "}\n");
3231         std::string fragmentShaderTemplate                      ("${GLSL_VERSION_DECL}\n"
3232                                                                                                          "\n"
3233                                                                                                          "layout (location = 0) out mediump vec4 o_color;\n"
3234                                                                                                          "\n"
3235                                                                                                          "in mediump vec4 in_f_color;\n"
3236                                                                                                          "\n"
3237                                                                                                          "void main (void)\n"
3238                                                                                                          "{\n"
3239                                                                                                          "      o_color = in_f_color;\n"
3240                                                                                                  "}\n");
3241
3242         m_program = SharedPtr<const ShaderProgram>(new ShaderProgram(m_context.getRenderContext(), glu::ProgramSources()
3243                         << glu::VertexSource                                    (specializeShader(m_context, vertexShaderTemplate.c_str()))
3244                         << glu::TessellationControlSource               (specializeShader(m_context, tessellationControlTemplate.c_str()))
3245                         << glu::TessellationEvaluationSource    (specializeShader(m_context, tessellationEvaluationTemplate.c_str()))
3246                         << glu::FragmentSource                                  (specializeShader(m_context, fragmentShaderTemplate.c_str()))));
3247
3248         m_testCtx.getLog() << *m_program;
3249         if (!m_program->isOk())
3250                 TCU_FAIL("Program compilation failed");
3251 }
3252
3253 void PerPatchDataCase::deinit (void)
3254 {
3255         m_program.clear();
3256 }
3257
3258 PerPatchDataCase::IterateResult PerPatchDataCase::iterate (void)
3259 {
3260         TestLog&                                        log                                             = m_testCtx.getLog();
3261         const RenderContext&            renderCtx                               = m_context.getRenderContext();
3262         const RandomViewport            viewport                                (renderCtx.getRenderTarget(), RENDER_SIZE, RENDER_SIZE, deStringHash(getName()));
3263         const deUint32                          programGL                               = m_program->getProgram();
3264         const glw::Functions&           gl                                              = renderCtx.getFunctions();
3265
3266         setViewport(gl, viewport);
3267         gl.clearColor(0.0f, 0.0f, 0.0f, 1.0f);
3268         gl.useProgram(programGL);
3269
3270         log << TestLog::Message << "Note: input patch size is " << INPUT_PATCH_SIZE << ", output patch size is " << OUTPUT_PATCH_SIZE << TestLog::EndMessage;
3271
3272         {
3273                 const int numPrimitives = m_caseType == CASETYPE_PRIMITIVE_ID_TCS || m_caseType == CASETYPE_PRIMITIVE_ID_TES ? 8 : 1;
3274
3275                 vector<float> attributeData;
3276                 attributeData.reserve(numPrimitives*INPUT_PATCH_SIZE);
3277
3278                 for (int i = 0; i < numPrimitives; i++)
3279                 {
3280                         attributeData.push_back((float)i / (float)numPrimitives);
3281                         for (int j = 0; j < INPUT_PATCH_SIZE-1; j++)
3282                                 attributeData.push_back(0.0f);
3283                 }
3284
3285                 gl.patchParameteri(GL_PATCH_VERTICES, INPUT_PATCH_SIZE);
3286                 gl.clear(GL_COLOR_BUFFER_BIT);
3287
3288                 gl.uniform1f(gl.getUniformLocation(programGL, "u_xScale"), 1.0f / (float)numPrimitives);
3289
3290                 const glu::VertexArrayBinding attrBindings[] =
3291                 {
3292                         glu::va::Float("in_v_attr", 1, (int)attributeData.size(), 0, &attributeData[0])
3293                 };
3294
3295                 glu::draw(m_context.getRenderContext(), programGL, DE_LENGTH_OF_ARRAY(attrBindings), &attrBindings[0],
3296                         glu::pr::Patches(numPrimitives*INPUT_PATCH_SIZE));
3297                 GLU_EXPECT_NO_ERROR(gl.getError(), "Draw failed");
3298         }
3299
3300         {
3301                 const tcu::Surface rendered = getPixels(renderCtx, viewport);
3302
3303                 if (m_caseType == CASETYPE_PRIMITIVE_ID_TCS || m_caseType == CASETYPE_PRIMITIVE_ID_TES)
3304                 {
3305                         DE_ASSERT(caseTypeUsesRefImageFromFile(m_caseType));
3306
3307                         const tcu::TextureLevel         reference       = getPNG(m_testCtx.getArchive(), m_referenceImagePath);
3308                         const bool                                      success         = tcu::fuzzyCompare(log, "ImageComparison", "Image Comparison", reference.getAccess(), rendered.getAccess(), 0.02f, tcu::COMPARE_LOG_RESULT);
3309
3310                         m_testCtx.setTestResult(success ? QP_TEST_RESULT_PASS : QP_TEST_RESULT_FAIL, success ? "Pass" : "Image comparison failed");
3311                         return STOP;
3312                 }
3313                 else
3314                 {
3315                         DE_ASSERT(!caseTypeUsesRefImageFromFile(m_caseType));
3316
3317                         log << TestLog::Image("RenderedImage", "Rendered Image", rendered);
3318
3319                         for (int y = 0; y < rendered.getHeight();       y++)
3320                         for (int x = 0; x < rendered.getWidth();        x++)
3321                         {
3322                                 if (rendered.getPixel(x, y) != tcu::RGBA::white())
3323                                 {
3324                                         log << TestLog::Message << "Failure: expected all white pixels" << TestLog::EndMessage;
3325                                         m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "Image verification failed");
3326                                         return STOP;
3327                                 }
3328                         }
3329
3330                         m_testCtx.setTestResult(QP_TEST_RESULT_PASS, "Pass");
3331                         return STOP;
3332                 }
3333         }
3334 }
3335
3336 // Basic barrier() usage in TCS.
3337 class BarrierCase : public TestCase
3338 {
3339 public:
3340         BarrierCase (Context& context, const char* name, const char* description, const char* referenceImagePath)
3341                 : TestCase                              (context, name, description)
3342                 , m_referenceImagePath  (referenceImagePath)
3343         {
3344         }
3345
3346         void                                                    init            (void);
3347         void                                                    deinit          (void);
3348         IterateResult                                   iterate         (void);
3349
3350 private:
3351         static const int                                RENDER_SIZE = 256;
3352         static const int                                NUM_VERTICES;
3353
3354         const string                                    m_referenceImagePath;
3355
3356         SharedPtr<const ShaderProgram>  m_program;
3357 };
3358
3359 const int BarrierCase::NUM_VERTICES = 32;
3360
3361 void BarrierCase::init (void)
3362 {
3363         checkTessellationSupport(m_context);
3364         checkRenderTargetSize(m_context.getRenderTarget(), RENDER_SIZE);
3365
3366         const string numVertsStr = de::toString(NUM_VERTICES);
3367
3368         std::string vertexShaderTemplate                        ("${GLSL_VERSION_DECL}\n"
3369                                                                                                          "\n"
3370                                                                                                          "in highp float in_v_attr;\n"
3371                                                                                                          "\n"
3372                                                                                                          "out highp float in_tc_attr;\n"
3373                                                                                                          "\n"
3374                                                                                                          "void main (void)\n"
3375                                                                                                          "{\n"
3376                                                                                                          "      in_tc_attr = in_v_attr;\n"
3377                                                                                                  "}\n");
3378         std::string tessellationControlTemplate         ("${GLSL_VERSION_DECL}\n"
3379                                                                                                  "${TESSELLATION_SHADER_REQUIRE}\n"
3380                                                                                                          "\n"
3381                                                                                                          "layout (vertices = " + numVertsStr + ") out;\n"
3382                                                                                                          "\n"
3383                                                                                                          "in highp float in_tc_attr[];\n"
3384                                                                                                          "\n"
3385                                                                                                          "out highp float in_te_attr[];\n"
3386                                                                                                          "patch out highp float in_te_patchAttr;\n"
3387                                                                                                          "\n"
3388                                                                                                          "void main (void)\n"
3389                                                                                                          "{\n"
3390                                                                                                          "      in_te_attr[gl_InvocationID] = in_tc_attr[gl_InvocationID];\n"
3391                                                                                                          "      in_te_patchAttr = 0.0f;\n"
3392                                                                                                          "      barrier();\n"
3393                                                                                                          "      if (gl_InvocationID == 5)\n"
3394                                                                                                          "              in_te_patchAttr = float(gl_InvocationID)*0.1;\n"
3395                                                                                                          "      barrier();\n"
3396                                                                                                          "      highp float temp = in_te_patchAttr + in_te_attr[gl_InvocationID];\n"
3397                                                                                                          "      barrier();\n"
3398                                                                                                          "      if (gl_InvocationID == " + numVertsStr + "-1)\n"
3399                                                                                                          "              in_te_patchAttr = float(gl_InvocationID);\n"
3400                                                                                                          "      barrier();\n"
3401                                                                                                          "      in_te_attr[gl_InvocationID] = temp;\n"
3402                                                                                                          "      barrier();\n"
3403                                                                                                          "      temp = temp + in_te_attr[(gl_InvocationID+1) % " + numVertsStr + "];\n"
3404                                                                                                          "      barrier();\n"
3405                                                                                                          "      in_te_attr[gl_InvocationID] = 0.25*temp;\n"
3406                                                                                                          "\n"
3407                                                                                                          "      gl_TessLevelInner[0] = 32.0;\n"
3408                                                                                                          "      gl_TessLevelInner[1] = 32.0;\n"
3409                                                                                                          "\n"
3410                                                                                                          "      gl_TessLevelOuter[0] = 32.0;\n"
3411                                                                                                          "      gl_TessLevelOuter[1] = 32.0;\n"
3412                                                                                                          "      gl_TessLevelOuter[2] = 32.0;\n"
3413                                                                                                          "      gl_TessLevelOuter[3] = 32.0;\n"
3414                                                                                                  "}\n");
3415         std::string tessellationEvaluationTemplate      ("${GLSL_VERSION_DECL}\n"
3416                                                                                                  "${TESSELLATION_SHADER_REQUIRE}\n"
3417                                                                                                          "\n"
3418                                                                                                          + getTessellationEvaluationInLayoutString(TESSPRIMITIVETYPE_QUADS) +
3419                                                                                                          "\n"
3420                                                                                                          "in highp float in_te_attr[];\n"
3421                                                                                                          "patch in highp float in_te_patchAttr;\n"
3422                                                                                                          "\n"
3423                                                                                                          "out highp float in_f_blue;\n"
3424                                                                                                          "\n"
3425                                                                                                          "void main (void)\n"
3426                                                                                                          "{\n"
3427                                                                                                          "      highp float x = gl_TessCoord.x*2.0 - 1.0;\n"
3428                                                                                                          "      highp float y = gl_TessCoord.y - in_te_attr[int(round(gl_TessCoord.x*float(" + numVertsStr + "-1)))];\n"
3429                                                                                                          "      gl_Position = vec4(x, y, 0.0, 1.0);\n"
3430                                                                                                          "      in_f_blue = abs(in_te_patchAttr - float(" + numVertsStr + "-1));\n"
3431                                                                                                  "}\n");
3432         std::string fragmentShaderTemplate                      ("${GLSL_VERSION_DECL}\n"
3433                                                                                                          "\n"
3434                                                                                                          "layout (location = 0) out mediump vec4 o_color;\n"
3435                                                                                                          "\n"
3436                                                                                                          "in highp float in_f_blue;\n"
3437                                                                                                          "\n"
3438                                                                                                          "void main (void)\n"
3439                                                                                                          "{\n"
3440                                                                                                          "      o_color = vec4(1.0, 0.0, in_f_blue, 1.0);\n"
3441                                                                                                  "}\n");
3442
3443         m_program = SharedPtr<const ShaderProgram>(new ShaderProgram(m_context.getRenderContext(), glu::ProgramSources()
3444                         << glu::VertexSource                                    (specializeShader(m_context, vertexShaderTemplate.c_str()))
3445                         << glu::TessellationControlSource               (specializeShader(m_context, tessellationControlTemplate.c_str()))
3446                         << glu::TessellationEvaluationSource    (specializeShader(m_context, tessellationEvaluationTemplate.c_str()))
3447                         << glu::FragmentSource                                  (specializeShader(m_context, fragmentShaderTemplate.c_str()))));
3448
3449         m_testCtx.getLog() << *m_program;
3450         if (!m_program->isOk())
3451                 TCU_FAIL("Program compilation failed");
3452 }
3453
3454 void BarrierCase::deinit (void)
3455 {
3456         m_program.clear();
3457 }
3458
3459 BarrierCase::IterateResult BarrierCase::iterate (void)
3460 {
3461         TestLog&                                        log                                             = m_testCtx.getLog();
3462         const RenderContext&            renderCtx                               = m_context.getRenderContext();
3463         const RandomViewport            viewport                                (renderCtx.getRenderTarget(), RENDER_SIZE, RENDER_SIZE, deStringHash(getName()));
3464         const deUint32                          programGL                               = m_program->getProgram();
3465         const glw::Functions&           gl                                              = renderCtx.getFunctions();
3466
3467         setViewport(gl, viewport);
3468         gl.clearColor(0.0f, 0.0f, 0.0f, 1.0f);
3469         gl.useProgram(programGL);
3470
3471         {
3472                 vector<float> attributeData(NUM_VERTICES);
3473
3474                 for (int i = 0; i < NUM_VERTICES; i++)
3475                         attributeData[i] = (float)i / (float)(NUM_VERTICES-1);
3476
3477                 gl.patchParameteri(GL_PATCH_VERTICES, NUM_VERTICES);
3478                 gl.clear(GL_COLOR_BUFFER_BIT);
3479
3480                 const glu::VertexArrayBinding attrBindings[] =
3481                 {
3482                         glu::va::Float("in_v_attr", 1, (int)attributeData.size(), 0, &attributeData[0])
3483                 };
3484
3485                 glu::draw(m_context.getRenderContext(), programGL, DE_LENGTH_OF_ARRAY(attrBindings), &attrBindings[0],
3486                         glu::pr::Patches(NUM_VERTICES));
3487                 GLU_EXPECT_NO_ERROR(gl.getError(), "Draw failed");
3488         }
3489
3490         {
3491                 const tcu::Surface                      rendered        = getPixels(renderCtx, viewport);
3492                 const tcu::TextureLevel         reference       = getPNG(m_testCtx.getArchive(), m_referenceImagePath);
3493                 const bool                                      success         = tcu::fuzzyCompare(log, "ImageComparison", "Image Comparison", reference.getAccess(), rendered.getAccess(), 0.02f, tcu::COMPARE_LOG_RESULT);
3494
3495                 m_testCtx.setTestResult(success ? QP_TEST_RESULT_PASS : QP_TEST_RESULT_FAIL, success ? "Pass" : "Image comparison failed");
3496                 return STOP;
3497         }
3498 }
3499
3500 /*--------------------------------------------------------------------*//*!
3501  * \brief Base class for testing invariance of entire primitive set
3502  *
3503  * Draws two patches with identical tessellation levels and compares the
3504  * results. Repeats the same with other programs that are only different
3505  * in irrelevant ways; compares the results between these two programs.
3506  * Also potentially compares to results produced by different tessellation
3507  * levels (see e.g. invariance rule #6).
3508  * Furthermore, repeats the above with multiple different tessellation
3509  * value sets.
3510  *
3511  * The manner of primitive set comparison is defined by subclass. E.g.
3512  * case for invariance rule #1 tests that same vertices come out, in same
3513  * order; rule #5 only requires that the same triangles are output, but
3514  * not necessarily in the same order.
3515  *//*--------------------------------------------------------------------*/
3516 class PrimitiveSetInvarianceCase : public TestCase
3517 {
3518 public:
3519         enum WindingUsage
3520         {
3521                 WINDINGUSAGE_CCW = 0,
3522                 WINDINGUSAGE_CW,
3523                 WINDINGUSAGE_VARY,
3524
3525                 WINDINGUSAGE_LAST
3526         };
3527
3528         PrimitiveSetInvarianceCase (Context& context, const char* name, const char* description, TessPrimitiveType primType, SpacingMode spacing, bool usePointMode, WindingUsage windingUsage)
3529                 : TestCase                      (context, name, description)
3530                 , m_primitiveType       (primType)
3531                 , m_spacing                     (spacing)
3532                 , m_usePointMode        (usePointMode)
3533                 , m_windingUsage        (windingUsage)
3534         {
3535         }
3536
3537         void                                                                    init                            (void);
3538         void                                                                    deinit                          (void);
3539         IterateResult                                                   iterate                         (void);
3540
3541 protected:
3542         struct TessLevels
3543         {
3544                 float inner[2];
3545                 float outer[4];
3546                 string description (void) const { return tessellationLevelsString(&inner[0], &outer[0]); }
3547         };
3548         struct LevelCase
3549         {
3550                 vector<TessLevels>      levels;
3551                 int                                     mem; //!< Subclass-defined arbitrary piece of data, for type of the levelcase, if needed. Passed to compare().
3552                 LevelCase (const TessLevels& lev) : levels(vector<TessLevels>(1, lev)), mem(0) {}
3553                 LevelCase (void) : mem(0) {}
3554         };
3555
3556         virtual vector<LevelCase>       genTessLevelCases       (void) const;
3557         virtual bool                            compare                         (const vector<Vec3>& coordsA, const vector<Vec3>& coordsB, int levelCaseMem) const = 0;
3558
3559         const TessPrimitiveType         m_primitiveType;
3560
3561 private:
3562         struct Program
3563         {
3564                 Winding                                                 winding;
3565                 SharedPtr<const ShaderProgram>  program;
3566
3567                                 Program                 (Winding w, const SharedPtr<const ShaderProgram>& prog) : winding(w), program(prog) {}
3568
3569                 string  description             (void) const { return string() + "winding mode " + getWindingShaderName(winding); };
3570         };
3571
3572         static const int                        RENDER_SIZE = 16;
3573
3574         const SpacingMode                       m_spacing;
3575         const bool                                      m_usePointMode;
3576         const WindingUsage                      m_windingUsage;
3577
3578         vector<Program>                         m_programs;
3579 };
3580
3581 vector<PrimitiveSetInvarianceCase::LevelCase> PrimitiveSetInvarianceCase::genTessLevelCases (void) const
3582 {
3583         static const TessLevels basicTessLevelCases[] =
3584         {
3585                 { { 1.0f,       1.0f    },      { 1.0f,         1.0f,   1.0f,   1.0f    } },
3586                 { { 63.0f,      24.0f   },      { 15.0f,        42.0f,  10.0f,  12.0f   } },
3587                 { { 3.0f,       2.0f    },      { 6.0f,         8.0f,   7.0f,   9.0f    } },
3588                 { { 4.0f,       6.0f    },      { 2.0f,         3.0f,   1.0f,   4.0f    } },
3589                 { { 2.0f,       2.0f    },      { 6.0f,         8.0f,   7.0f,   9.0f    } },
3590                 { { 5.0f,       6.0f    },      { 1.0f,         1.0f,   1.0f,   1.0f    } },
3591                 { { 1.0f,       6.0f    },      { 2.0f,         3.0f,   1.0f,   4.0f    } },
3592                 { { 5.0f,       1.0f    },      { 2.0f,         3.0f,   1.0f,   4.0f    } },
3593                 { { 5.2f,       1.6f    },      { 2.9f,         3.4f,   1.5f,   4.1f    } }
3594         };
3595
3596         vector<LevelCase> result;
3597         for (int i = 0; i < DE_LENGTH_OF_ARRAY(basicTessLevelCases); i++)
3598                 result.push_back(LevelCase(basicTessLevelCases[i]));
3599
3600         {
3601                 de::Random rnd(123);
3602                 for (int i = 0; i < 10; i++)
3603                 {
3604                         TessLevels levels;
3605                         for (int j = 0; j < DE_LENGTH_OF_ARRAY(levels.inner); j++)
3606                                 levels.inner[j] = rnd.getFloat(1.0f, 16.0f);
3607                         for (int j = 0; j < DE_LENGTH_OF_ARRAY(levels.outer); j++)
3608                                 levels.outer[j] = rnd.getFloat(1.0f, 16.0f);
3609                         result.push_back(LevelCase(levels));
3610                 }
3611         }
3612
3613         return result;
3614 }
3615
3616 void PrimitiveSetInvarianceCase::init (void)
3617 {
3618         const int                       numDifferentConstantExprCases = 2;
3619         vector<Winding>         windings;
3620         switch (m_windingUsage)
3621         {
3622                 case WINDINGUSAGE_CCW:          windings.push_back(WINDING_CCW); break;
3623                 case WINDINGUSAGE_CW:           windings.push_back(WINDING_CW); break;
3624                 case WINDINGUSAGE_VARY:         windings.push_back(WINDING_CCW);
3625                                                                         windings.push_back(WINDING_CW); break;
3626                 default: DE_ASSERT(false);
3627         }
3628
3629         checkTessellationSupport(m_context);
3630         checkRenderTargetSize(m_context.getRenderTarget(), RENDER_SIZE);
3631
3632         for (int constantExprCaseNdx = 0; constantExprCaseNdx < numDifferentConstantExprCases; constantExprCaseNdx++)
3633         {
3634                 for (int windingCaseNdx = 0; windingCaseNdx < (int)windings.size(); windingCaseNdx++)
3635                 {
3636                         const string    floatLit01 = de::floatToString(10.0f / (float)(constantExprCaseNdx + 10), 2);
3637                         const int               programNdx = (int)m_programs.size();
3638
3639                         std::string vertexShaderTemplate                        ("${GLSL_VERSION_DECL}\n"
3640                                                                                                                          "\n"
3641                                                                                                                          "in highp float in_v_attr;\n"
3642                                                                                                                          "out highp float in_tc_attr;\n"
3643                                                                                                                          "\n"
3644                                                                                                                          "void main (void)\n"
3645                                                                                                                          "{\n"
3646                                                                                                                          "      in_tc_attr = in_v_attr;\n"
3647                                                                                                                  "}\n");
3648                         std::string tessellationControlTemplate         ("${GLSL_VERSION_DECL}\n"
3649                                                                                                                  "${TESSELLATION_SHADER_REQUIRE}\n"
3650                                                                                                                          "\n"
3651                                                                                                                          "layout (vertices = " + de::toString(constantExprCaseNdx+1) + ") out;\n"
3652                                                                                                                          "\n"
3653                                                                                                                          "in highp float in_tc_attr[];\n"
3654                                                                                                                          "\n"
3655                                                                                                                          "patch out highp float in_te_positionOffset;\n"
3656                                                                                                                          "\n"
3657                                                                                                                          "void main (void)\n"
3658                                                                                                                          "{\n"
3659                                                                                                                          "      in_te_positionOffset = in_tc_attr[6];\n"
3660                                                                                                                          "\n"
3661                                                                                                                          "      gl_TessLevelInner[0] = in_tc_attr[0];\n"
3662                                                                                                                          "      gl_TessLevelInner[1] = in_tc_attr[1];\n"
3663                                                                                                                          "\n"
3664                                                                                                                          "      gl_TessLevelOuter[0] = in_tc_attr[2];\n"
3665                                                                                                                          "      gl_TessLevelOuter[1] = in_tc_attr[3];\n"
3666                                                                                                                          "      gl_TessLevelOuter[2] = in_tc_attr[4];\n"
3667                                                                                                                          "      gl_TessLevelOuter[3] = in_tc_attr[5];\n"
3668                                                                                                                  "}\n");
3669                         std::string tessellationEvaluationTemplate      ("${GLSL_VERSION_DECL}\n"
3670                                                                                                                  "${TESSELLATION_SHADER_REQUIRE}\n"
3671                                                                                                                          "\n"
3672                                                                                                                          + getTessellationEvaluationInLayoutString(m_primitiveType, m_spacing, windings[windingCaseNdx], m_usePointMode) +
3673                                                                                                                          "\n"
3674                                                                                                                          "patch in highp float in_te_positionOffset;\n"
3675                                                                                                                          "\n"
3676                                                                                                                          "out highp vec4 in_f_color;\n"
3677                                                                                                                          "invariant out highp vec3 out_te_tessCoord;\n"
3678                                                                                                                          "\n"
3679                                                                                                                          "void main (void)\n"
3680                                                                                                                          "{\n"
3681                                                                                                                          "      gl_Position = vec4(gl_TessCoord.xy*" + floatLit01 + " - in_te_positionOffset + float(gl_PrimitiveID)*0.1, 0.0, 1.0);\n"
3682                                                                                                                          "      in_f_color = vec4(" + floatLit01 + ");\n"
3683                                                                                                                          "      out_te_tessCoord = gl_TessCoord;\n"
3684                                                                                                                  "}\n");
3685                         std::string fragmentShaderTemplate                      ("${GLSL_VERSION_DECL}\n"
3686                                                                                                                          "\n"
3687                                                                                                                          "layout (location = 0) out mediump vec4 o_color;\n"
3688                                                                                                                          "\n"
3689                                                                                                                          "in highp vec4 in_f_color;\n"
3690                                                                                                                          "\n"
3691                                                                                                                          "void main (void)\n"
3692                                                                                                                          "{\n"
3693                                                                                                                          "      o_color = in_f_color;\n"
3694                                                                                                                  "}\n");
3695
3696                         m_programs.push_back(Program(windings[windingCaseNdx],
3697                                                                                  SharedPtr<const ShaderProgram>(new ShaderProgram(m_context.getRenderContext(), glu::ProgramSources()
3698                                         << glu::VertexSource                                    (specializeShader(m_context, vertexShaderTemplate.c_str()))
3699                                         << glu::TessellationControlSource               (specializeShader(m_context, tessellationControlTemplate.c_str()))
3700                                         << glu::TessellationEvaluationSource    (specializeShader(m_context, tessellationEvaluationTemplate.c_str()))
3701                                         << glu::FragmentSource                                  (specializeShader(m_context, fragmentShaderTemplate.c_str()))
3702                                         << glu::TransformFeedbackVarying                ("out_te_tessCoord")
3703                                         << glu::TransformFeedbackMode                   (GL_INTERLEAVED_ATTRIBS)))));
3704
3705                         {
3706                                 const tcu::ScopedLogSection section(m_testCtx.getLog(), "Program" + de::toString(programNdx), "Program " + de::toString(programNdx));
3707
3708                                 if (programNdx == 0 || !m_programs.back().program->isOk())
3709                                         m_testCtx.getLog() << *m_programs.back().program;
3710
3711                                 if (!m_programs.back().program->isOk())
3712                                         TCU_FAIL("Program compilation failed");
3713
3714                                 if (programNdx > 0)
3715                                         m_testCtx.getLog() << TestLog::Message << "Note: program " << programNdx << " is similar to above, except some constants are different, and: " << m_programs.back().description() << TestLog::EndMessage;
3716                         }
3717                 }
3718         }
3719 }
3720
3721 void PrimitiveSetInvarianceCase::deinit (void)
3722 {
3723         m_programs.clear();
3724 }
3725
3726 PrimitiveSetInvarianceCase::IterateResult PrimitiveSetInvarianceCase::iterate (void)
3727 {
3728         typedef TransformFeedbackHandler<Vec3> TFHandler;
3729
3730         TestLog&                                        log                                     = m_testCtx.getLog();
3731         const RenderContext&            renderCtx                       = m_context.getRenderContext();
3732         const RandomViewport            viewport                        (renderCtx.getRenderTarget(), RENDER_SIZE, RENDER_SIZE, deStringHash(getName()));
3733         const glw::Functions&           gl                                      = renderCtx.getFunctions();
3734         const vector<LevelCase>         tessLevelCases          = genTessLevelCases();
3735         vector<vector<int> >            primitiveCounts;
3736         int                                                     maxNumPrimitives        = -1;
3737
3738         for (int caseNdx = 0; caseNdx < (int)tessLevelCases.size(); caseNdx++)
3739         {
3740                 primitiveCounts.push_back(vector<int>());
3741                 for (int i = 0; i < (int)tessLevelCases[caseNdx].levels.size(); i++)
3742                 {
3743                         const int primCount = referencePrimitiveCount(m_primitiveType, m_spacing, m_usePointMode,
3744                                                                                                                   &tessLevelCases[caseNdx].levels[i].inner[0], &tessLevelCases[caseNdx].levels[i].outer[0]);
3745                         primitiveCounts.back().push_back(primCount);
3746                         maxNumPrimitives = de::max(maxNumPrimitives, primCount);
3747                 }
3748         }
3749
3750         const deUint32                          primitiveTypeGL         = outputPrimitiveTypeGL(m_primitiveType, m_usePointMode);
3751         const TFHandler                         transformFeedback       (m_context.getRenderContext(), 2*maxNumPrimitives*numVerticesPerPrimitive(primitiveTypeGL));
3752
3753         setViewport(gl, viewport);
3754         gl.patchParameteri(GL_PATCH_VERTICES, 7);
3755
3756         for (int tessLevelCaseNdx = 0; tessLevelCaseNdx < (int)tessLevelCases.size(); tessLevelCaseNdx++)
3757         {
3758                 const LevelCase&        levelCase = tessLevelCases[tessLevelCaseNdx];
3759                 vector<Vec3>            firstPrimVertices;
3760
3761                 {
3762                         string tessLevelsStr;
3763                         for (int i = 0; i < (int)levelCase.levels.size(); i++)
3764                                 tessLevelsStr += (levelCase.levels.size() > 1 ? "\n" : "") + levelCase.levels[i].description();
3765                         log << TestLog::Message << "Tessellation level sets: " << tessLevelsStr << TestLog::EndMessage;
3766                 }
3767
3768                 for (int subTessLevelCaseNdx = 0; subTessLevelCaseNdx < (int)levelCase.levels.size(); subTessLevelCaseNdx++)
3769                 {
3770                         const TessLevels&                               tessLevels              = levelCase.levels[subTessLevelCaseNdx];
3771                         const float                                             (&inner)[2]             = tessLevels.inner;
3772                         const float                                             (&outer)[4]             = tessLevels.outer;
3773                         const float                                             attribute[2*7]  = { inner[0], inner[1], outer[0], outer[1], outer[2], outer[3], 0.0f,
3774                                                                                                                                 inner[0], inner[1], outer[0], outer[1], outer[2], outer[3], 0.5f };
3775                         const glu::VertexArrayBinding   bindings[]              = { glu::va::Float("in_v_attr", 1, DE_LENGTH_OF_ARRAY(attribute), 0, &attribute[0]) };
3776
3777                         for (int programNdx = 0; programNdx < (int)m_programs.size(); programNdx++)
3778                         {
3779                                 const deUint32                          programGL       = m_programs[programNdx].program->getProgram();
3780                                 gl.useProgram(programGL);
3781                                 const TFHandler::Result         tfResult        = transformFeedback.renderAndGetPrimitives(programGL, primitiveTypeGL, DE_LENGTH_OF_ARRAY(bindings), &bindings[0], DE_LENGTH_OF_ARRAY(attribute));
3782
3783                                 if (tfResult.numPrimitives != 2*primitiveCounts[tessLevelCaseNdx][subTessLevelCaseNdx])
3784                                 {
3785                                         log << TestLog::Message << "Failure: GL reported GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN to be "
3786                                                                                         << tfResult.numPrimitives << ", reference value is " << 2*primitiveCounts[tessLevelCaseNdx][subTessLevelCaseNdx]
3787                                                                                         << TestLog::EndMessage;
3788
3789                                         m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "Invalid set of primitives");
3790                                         return STOP;
3791                                 }
3792
3793                                 {
3794                                         const int                       half                    = (int)tfResult.varying.size()/2;
3795                                         const vector<Vec3>      prim0Vertices   = vector<Vec3>(tfResult.varying.begin(), tfResult.varying.begin() + half);
3796                                         const Vec3* const       prim1Vertices   = &tfResult.varying[half];
3797
3798                                         for (int vtxNdx = 0; vtxNdx < (int)prim0Vertices.size(); vtxNdx++)
3799                                         {
3800                                                 if (prim0Vertices[vtxNdx] != prim1Vertices[vtxNdx])
3801                                                 {
3802                                                         log << TestLog::Message << "Failure: tessellation coordinate at index " << vtxNdx << " differs between two primitives drawn in one draw call" << TestLog::EndMessage
3803                                                                 << TestLog::Message << "Note: the coordinate is " << prim0Vertices[vtxNdx] << " for the first primitive and " << prim1Vertices[vtxNdx] << " for the second" << TestLog::EndMessage
3804                                                                 << TestLog::Message << "Note: tessellation levels for both primitives were: " << tessellationLevelsString(&inner[0], &outer[0]) << TestLog::EndMessage;
3805                                                         m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "Invalid set of primitives");
3806                                                         return STOP;
3807                                                 }
3808                                         }
3809
3810                                         if (programNdx == 0 && subTessLevelCaseNdx == 0)
3811                                                 firstPrimVertices = prim0Vertices;
3812                                         else
3813                                         {
3814                                                 const bool compareOk = compare(firstPrimVertices, prim0Vertices, levelCase.mem);
3815                                                 if (!compareOk)
3816                                                 {
3817                                                         log << TestLog::Message << "Note: comparison of tessellation coordinates failed; comparison was made between following cases:\n"
3818                                                                                                         << "  - case A: program 0, tessellation levels: " << tessLevelCases[tessLevelCaseNdx].levels[0].description() << "\n"
3819                                                                                                         << "  - case B: program " << programNdx << ", tessellation levels: " << tessLevels.description() << TestLog::EndMessage;
3820                                                         m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "Invalid set of primitives");
3821                                                         return STOP;
3822                                                 }
3823                                         }
3824                                 }
3825                         }
3826                 }
3827         }
3828
3829         m_testCtx.setTestResult(QP_TEST_RESULT_PASS, "Pass");
3830         return STOP;
3831 }
3832
3833 /*--------------------------------------------------------------------*//*!
3834  * \brief Test invariance rule #1
3835  *
3836  * Test that the sequence of primitives input to the TES only depends on
3837  * the tessellation levels, tessellation mode, spacing mode, winding, and
3838  * point mode.
3839  *//*--------------------------------------------------------------------*/
3840 class InvariantPrimitiveSetCase : public PrimitiveSetInvarianceCase
3841 {
3842 public:
3843         InvariantPrimitiveSetCase (Context& context, const char* name, const char* description, TessPrimitiveType primType, SpacingMode spacing, Winding winding, bool usePointMode)
3844                 : PrimitiveSetInvarianceCase(context, name, description, primType, spacing, usePointMode, winding == WINDING_CCW        ? WINDINGUSAGE_CCW
3845                                                                                                                                                                                                 : winding == WINDING_CW         ? WINDINGUSAGE_CW
3846                                                                                                                                                                                                 : WINDINGUSAGE_LAST)
3847         {
3848         }
3849
3850 protected:
3851         virtual bool compare (const vector<Vec3>& coordsA, const vector<Vec3>& coordsB, int) const
3852         {
3853                 for (int vtxNdx = 0; vtxNdx < (int)coordsA.size(); vtxNdx++)
3854                 {
3855                         if (coordsA[vtxNdx] != coordsB[vtxNdx])
3856                         {
3857                                 m_testCtx.getLog() << TestLog::Message << "Failure: tessellation coordinate at index " << vtxNdx << " differs between two programs" << TestLog::EndMessage
3858                                                                    << TestLog::Message << "Note: the coordinate is " << coordsA[vtxNdx] << " for the first program and " << coordsB[vtxNdx] << " for the other" << TestLog::EndMessage;
3859                                 return false;
3860                         }
3861                 }
3862                 return true;
3863         }
3864 };
3865
3866 /*--------------------------------------------------------------------*//*!
3867  * \brief Test invariance rule #2
3868  *
3869  * Test that the set of vertices along an outer edge of a quad or triangle
3870  * only depends on that edge's tessellation level, and spacing.
3871  *
3872  * For each (outer) edge in the quad or triangle, draw multiple patches
3873  * with identical tessellation levels for that outer edge but with
3874  * different values for the other outer edges; compare, among the
3875  * primitives, the vertices generated for that outer edge. Repeat with
3876  * different programs, using different winding etc. settings. Compare
3877  * the edge's vertices between different programs.
3878  *//*--------------------------------------------------------------------*/
3879 class InvariantOuterEdgeCase : public TestCase
3880 {
3881 public:
3882         InvariantOuterEdgeCase (Context& context, const char* name, const char* description, TessPrimitiveType primType, SpacingMode spacing)
3883                 : TestCase                      (context, name, description)
3884                 , m_primitiveType       (primType)
3885                 , m_spacing                     (spacing)
3886         {
3887                 DE_ASSERT(primType == TESSPRIMITIVETYPE_TRIANGLES || primType == TESSPRIMITIVETYPE_QUADS);
3888         }
3889
3890         void                                            init            (void);
3891         void                                            deinit          (void);
3892         IterateResult                           iterate         (void);
3893
3894 private:
3895         struct Program
3896         {
3897                 Winding                                                 winding;
3898                 bool                                                    usePointMode;
3899                 SharedPtr<const ShaderProgram>  program;
3900
3901                                 Program                 (Winding w, bool point, const SharedPtr<const ShaderProgram>& prog) : winding(w), usePointMode(point), program(prog) {}
3902
3903                 string  description             (void) const { return string() + "winding mode " + getWindingShaderName(winding) + ", " + (usePointMode ? "" : "don't ") + "use point mode"; };
3904         };
3905
3906         static vector<float>            generatePatchTessLevels (int numPatches, int constantOuterLevelIndex, float constantOuterLevel);
3907
3908         static const int                        RENDER_SIZE = 16;
3909
3910         const TessPrimitiveType         m_primitiveType;
3911         const SpacingMode                       m_spacing;
3912
3913         vector<Program>                         m_programs;
3914 };
3915
3916 vector<float> InvariantOuterEdgeCase::generatePatchTessLevels (int numPatches, int constantOuterLevelIndex, float constantOuterLevel)
3917 {
3918         de::Random rnd(123);
3919         return generateRandomPatchTessLevels(numPatches, constantOuterLevelIndex, constantOuterLevel, rnd);
3920 }
3921
3922 void InvariantOuterEdgeCase::init (void)
3923 {
3924         checkTessellationSupport(m_context);
3925         checkRenderTargetSize(m_context.getRenderTarget(), RENDER_SIZE);
3926
3927         for (int windingI = 0; windingI < WINDING_LAST; windingI++)
3928         {
3929                 const Winding winding = (Winding)windingI;
3930
3931                 for (int usePointModeI = 0; usePointModeI <= 1; usePointModeI++)
3932                 {
3933                         const bool              usePointMode    = usePointModeI != 0;
3934                         const int               programNdx              = (int)m_programs.size();
3935                         const string    floatLit01              = de::floatToString(10.0f / (float)(programNdx + 10), 2);
3936
3937                         std::string vertexShaderTemplate                        ("${GLSL_VERSION_DECL}\n"
3938                                                                                                                  "\n"
3939                                                                                                                  "in highp float in_v_attr;\n"
3940                                                                                                                  "out highp float in_tc_attr;\n"
3941                                                                                                                  "\n"
3942                                                                                                                  "void main (void)\n"
3943                                                                                                                  "{\n"
3944                                                                                                                  "      in_tc_attr = in_v_attr;\n"
3945                                                                                                                  "}\n");
3946                         std::string tessellationControlTemplate         ("${GLSL_VERSION_DECL}\n"
3947                                                                                                                  "${TESSELLATION_SHADER_REQUIRE}\n"
3948                                                                                                                  "\n"
3949                                                                                                                  "layout (vertices = " + de::toString(programNdx+1) + ") out;\n"
3950                                                                                                                  "\n"
3951                                                                                                                  "in highp float in_tc_attr[];\n"
3952                                                                                                                  "\n"
3953                                                                                                                  "void main (void)\n"
3954                                                                                                                  "{\n"
3955                                                                                                                  "      gl_TessLevelInner[0] = in_tc_attr[0];\n"
3956                                                                                                                  "      gl_TessLevelInner[1] = in_tc_attr[1];\n"
3957                                                                                                                  "\n"
3958                                                                                                                  "      gl_TessLevelOuter[0] = in_tc_attr[2];\n"
3959                                                                                                                  "      gl_TessLevelOuter[1] = in_tc_attr[3];\n"
3960                                                                                                                  "      gl_TessLevelOuter[2] = in_tc_attr[4];\n"
3961                                                                                                                  "      gl_TessLevelOuter[3] = in_tc_attr[5];\n"
3962                                                                                                                  "}\n");
3963                         std::string tessellationEvaluationTemplate      ("${GLSL_VERSION_DECL}\n"
3964                                                                                                                  "${TESSELLATION_SHADER_REQUIRE}\n"
3965                                                                                                                  "\n"
3966                                                                                                                  + getTessellationEvaluationInLayoutString(m_primitiveType, m_spacing, winding, usePointMode) +
3967                                                                                                                  "\n"
3968                                                                                                                  "out highp vec4 in_f_color;\n"
3969                                                                                                                  "invariant out highp vec3 out_te_tessCoord;\n"
3970                                                                                                                  "\n"
3971                                                                                                                  "void main (void)\n"
3972                                                                                                                  "{\n"
3973                                                                                                                  "      gl_Position = vec4(gl_TessCoord.xy*" + floatLit01 + " - float(gl_PrimitiveID)*0.05, 0.0, 1.0);\n"
3974                                                                                                                  "      in_f_color = vec4(" + floatLit01 + ");\n"
3975                                                                                                                  "      out_te_tessCoord = gl_TessCoord;\n"
3976                                                                                                                  "}\n");
3977                         std::string fragmentShaderTemplate                      ("${GLSL_VERSION_DECL}\n"
3978                                                                                                                  "\n"
3979                                                                                                                  "layout (location = 0) out mediump vec4 o_color;\n"
3980                                                                                                                  "\n"
3981                                                                                                                  "in highp vec4 in_f_color;\n"
3982                                                                                                                  "\n"
3983                                                                                                                  "void main (void)\n"
3984                                                                                                                  "{\n"
3985                                                                                                                  "      o_color = in_f_color;\n"
3986                                                                                                                  "}\n");
3987
3988                         m_programs.push_back(Program(winding, usePointMode,
3989                                                                                  SharedPtr<const ShaderProgram>(new ShaderProgram(m_context.getRenderContext(), glu::ProgramSources()
3990                                 << glu::VertexSource                                    (specializeShader(m_context, vertexShaderTemplate.c_str()))
3991                                 << glu::TessellationControlSource               (specializeShader(m_context, tessellationControlTemplate.c_str()))
3992                                 << glu::TessellationEvaluationSource    (specializeShader(m_context, tessellationEvaluationTemplate.c_str()))
3993                                 << glu::FragmentSource                                  (specializeShader(m_context, fragmentShaderTemplate.c_str()))
3994                                 << glu::TransformFeedbackVarying                ("out_te_tessCoord")
3995                                 << glu::TransformFeedbackMode                   (GL_INTERLEAVED_ATTRIBS)))));
3996
3997                         {
3998                                 const tcu::ScopedLogSection section(m_testCtx.getLog(), "Program" + de::toString(programNdx), "Program " + de::toString(programNdx));
3999
4000                                 if (programNdx == 0 || !m_programs.back().program->isOk())
4001                                         m_testCtx.getLog() << *m_programs.back().program;
4002
4003                                 if (!m_programs.back().program->isOk())
4004                                         TCU_FAIL("Program compilation failed");
4005
4006                                 if (programNdx > 0)
4007                                         m_testCtx.getLog() << TestLog::Message << "Note: program " << programNdx << " is similar to above, except some constants are different, and: " << m_programs.back().description() << TestLog::EndMessage;
4008                         }
4009                 }
4010         }
4011 }
4012
4013 void InvariantOuterEdgeCase::deinit (void)
4014 {
4015         m_programs.clear();
4016 }
4017
4018 InvariantOuterEdgeCase::IterateResult InvariantOuterEdgeCase::iterate (void)
4019 {
4020         typedef TransformFeedbackHandler<Vec3> TFHandler;
4021
4022         TestLog&                                                        log                                                     = m_testCtx.getLog();
4023         const RenderContext&                            renderCtx                                       = m_context.getRenderContext();
4024         const RandomViewport                            viewport                                        (renderCtx.getRenderTarget(), RENDER_SIZE, RENDER_SIZE, deStringHash(getName()));
4025         const glw::Functions&                           gl                                                      = renderCtx.getFunctions();
4026
4027         static const float                                      singleOuterEdgeLevels[]         = { 1.0f, 1.2f, 1.9f, 2.3f, 2.8f, 3.3f, 3.8f, 10.2f, 1.6f, 24.4f, 24.7f, 63.0f };
4028         const int                                                       numPatchesPerDrawCall           = 10;
4029         const vector<OuterEdgeDescription>      edgeDescriptions                        = outerEdgeDescriptions(m_primitiveType);
4030
4031         {
4032                 // Compute the number vertices in the largest draw call, so we can allocate the TF buffer just once.
4033                 int maxNumVerticesInDrawCall = 0;
4034                 {
4035                         const vector<float> patchTessLevels = generatePatchTessLevels(numPatchesPerDrawCall, 0 /* outer-edge index doesn't affect vertex count */, arrayMax(singleOuterEdgeLevels));
4036
4037                         for (int usePointModeI = 0; usePointModeI <= 1; usePointModeI++)
4038                                 maxNumVerticesInDrawCall = de::max(maxNumVerticesInDrawCall,
4039                                                                                                    multiplePatchReferenceVertexCount(m_primitiveType, m_spacing, usePointModeI != 0, &patchTessLevels[0], numPatchesPerDrawCall));
4040                 }
4041
4042                 {
4043                         const TFHandler tfHandler(m_context.getRenderContext(), maxNumVerticesInDrawCall);
4044
4045                         setViewport(gl, viewport);
4046                         gl.patchParameteri(GL_PATCH_VERTICES, 6);
4047
4048                         for (int outerEdgeIndex = 0; outerEdgeIndex < (int)edgeDescriptions.size(); outerEdgeIndex++)
4049                         {
4050                                 const OuterEdgeDescription& edgeDesc = edgeDescriptions[outerEdgeIndex];
4051
4052                                 for (int outerEdgeLevelCaseNdx = 0; outerEdgeLevelCaseNdx < DE_LENGTH_OF_ARRAY(singleOuterEdgeLevels); outerEdgeLevelCaseNdx++)
4053                                 {
4054                                         typedef std::set<Vec3, VecLexLessThan<3> > Vec3Set;
4055
4056                                         const vector<float>                             patchTessLevels         = generatePatchTessLevels(numPatchesPerDrawCall, outerEdgeIndex, singleOuterEdgeLevels[outerEdgeLevelCaseNdx]);
4057                                         const glu::VertexArrayBinding   bindings[]                      = { glu::va::Float("in_v_attr", 1, (int)patchTessLevels.size(), 0, &patchTessLevels[0]) };
4058                                         Vec3Set                                                 firstOuterEdgeVertices; // Vertices of the outer edge of the first patch of the first program's draw call; used for comparison with other patches.
4059
4060                                         log << TestLog::Message << "Testing with outer tessellation level " << singleOuterEdgeLevels[outerEdgeLevelCaseNdx]
4061                                                                                         << " for the " << edgeDesc.description() << " edge, and with various levels for other edges, and with all programs" << TestLog::EndMessage;
4062
4063                                         for (int programNdx = 0; programNdx < (int)m_programs.size(); programNdx++)
4064                                         {
4065                                                 const Program& program          = m_programs[programNdx];
4066                                                 const deUint32 programGL        = program.program->getProgram();
4067
4068                                                 gl.useProgram(programGL);
4069
4070                                                 {
4071                                                         const TFHandler::Result         tfResult                        = tfHandler.renderAndGetPrimitives(programGL, outputPrimitiveTypeGL(m_primitiveType, program.usePointMode),
4072                                                                                                                                                                                                                            DE_LENGTH_OF_ARRAY(bindings), &bindings[0], (int)patchTessLevels.size());
4073                                                         const int                                       refNumVertices          = multiplePatchReferenceVertexCount(m_primitiveType, m_spacing, program.usePointMode, &patchTessLevels[0], numPatchesPerDrawCall);
4074                                                         int                                                     numVerticesRead         = 0;
4075
4076                                                         if ((int)tfResult.varying.size() != refNumVertices)
4077                                                         {
4078                                                                 log << TestLog::Message << "Failure: the number of vertices returned by transform feedback is "
4079                                                                                                                 << tfResult.varying.size() << ", expected " << refNumVertices << TestLog::EndMessage
4080                                                                         << TestLog::Message << "Note: rendered " << numPatchesPerDrawCall
4081                                                                                                                 << " patches in one draw call; tessellation levels for each patch are (in order [inner0, inner1, outer0, outer1, outer2, outer3]):\n"
4082                                                                                                                 << containerStr(patchTessLevels, 6) << TestLog::EndMessage;
4083
4084                                                                 m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "Invalid set of vertices");
4085                                                                 return STOP;
4086                                                         }
4087
4088                                                         // Check the vertices of each patch.
4089
4090                                                         for (int patchNdx = 0; patchNdx < numPatchesPerDrawCall; patchNdx++)
4091                                                         {
4092                                                                 const float* const      innerLevels                     = &patchTessLevels[6*patchNdx + 0];
4093                                                                 const float* const      outerLevels                     = &patchTessLevels[6*patchNdx + 2];
4094                                                                 const int                       patchNumVertices        = referenceVertexCount(m_primitiveType, m_spacing, program.usePointMode, innerLevels, outerLevels);
4095                                                                 Vec3Set                         outerEdgeVertices;
4096
4097                                                                 // We're interested in just the vertices on the current outer edge.
4098                                                                 for(int vtxNdx = numVerticesRead; vtxNdx < numVerticesRead + patchNumVertices; vtxNdx++)
4099                                                                 {
4100                                                                         const Vec3& vtx = tfResult.varying[vtxNdx];
4101                                                                         if (edgeDesc.contains(vtx))
4102                                                                                 outerEdgeVertices.insert(tfResult.varying[vtxNdx]);
4103                                                                 }
4104
4105                                                                 // Check that the outer edge contains an appropriate number of vertices.
4106                                                                 {
4107                                                                         const int refNumVerticesOnOuterEdge = 1 + getClampedRoundedTessLevel(m_spacing, singleOuterEdgeLevels[outerEdgeLevelCaseNdx]);
4108
4109                                                                         if ((int)outerEdgeVertices.size() != refNumVerticesOnOuterEdge)
4110                                                                         {
4111                                                                                 log << TestLog::Message << "Failure: the number of vertices on outer edge is " << outerEdgeVertices.size()
4112                                                                                                                                 << ", expected " << refNumVerticesOnOuterEdge << TestLog::EndMessage
4113                                                                                         << TestLog::Message << "Note: vertices on the outer edge are:\n" << containerStr(outerEdgeVertices, 5, 0) << TestLog::EndMessage
4114                                                                                         << TestLog::Message << "Note: the following parameters were used: " << program.description()
4115                                                                                                                                 << ", tessellation levels: " << tessellationLevelsString(innerLevels, outerLevels) << TestLog::EndMessage;
4116                                                                                 m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "Invalid set of vertices");
4117                                                                                 return STOP;
4118                                                                         }
4119                                                                 }
4120
4121                                                                 // Compare the vertices to those of the first patch (unless this is the first patch).
4122
4123                                                                 if (programNdx == 0 && patchNdx == 0)
4124                                                                         firstOuterEdgeVertices = outerEdgeVertices;
4125                                                                 else
4126                                                                 {
4127                                                                         if (firstOuterEdgeVertices != outerEdgeVertices)
4128                                                                         {
4129                                                                                 log << TestLog::Message << "Failure: vertices generated for the edge differ between the following cases:\n"
4130                                                                                                                                 << "  - case A: " << m_programs[0].description() << ", tessellation levels: "
4131                                                                                                                                                                   << tessellationLevelsString(&patchTessLevels[0], &patchTessLevels[2]) << "\n"
4132                                                                                                                                 << "  - case B: " << program.description() << ", tessellation levels: "
4133                                                                                                                                                                   << tessellationLevelsString(innerLevels, outerLevels) << TestLog::EndMessage;
4134
4135                                                                                 log << TestLog::Message << "Note: resulting vertices for the edge for the cases were:\n"
4136                                                                                                                                 << "  - case A: " << containerStr(firstOuterEdgeVertices, 5, 14) << "\n"
4137                                                                                                                                 << "  - case B: " << containerStr(outerEdgeVertices, 5, 14) << TestLog::EndMessage;
4138
4139                                                                                 m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "Invalid set of vertices");
4140                                                                                 return STOP;
4141                                                                         }
4142                                                                 }
4143
4144                                                                 numVerticesRead += patchNumVertices;
4145                                                         }
4146
4147                                                         DE_ASSERT(numVerticesRead == (int)tfResult.varying.size());
4148                                                 }
4149                                         }
4150                                 }
4151                         }
4152                 }
4153         }
4154
4155         m_testCtx.setTestResult(QP_TEST_RESULT_PASS, "Pass");
4156         return STOP;
4157 }
4158
4159 /*--------------------------------------------------------------------*//*!
4160  * \brief Test invariance rule #3
4161  *
4162  * Test that the vertices along an outer edge are placed symmetrically.
4163  *
4164  * Draw multiple patches with different tessellation levels and different
4165  * point_mode, winding etc. Before outputting tesscoords with TF, mirror
4166  * the vertices in the TES such that every vertex on an outer edge -
4167  * except the possible middle vertex - should be duplicated in the output.
4168  * Check that appropriate duplicates exist.
4169  *//*--------------------------------------------------------------------*/
4170 class SymmetricOuterEdgeCase : public TestCase
4171 {
4172 public:
4173         SymmetricOuterEdgeCase (Context& context, const char* name, const char* description, TessPrimitiveType primType, SpacingMode spacing, Winding winding, bool usePointMode)
4174                 : TestCase                      (context, name, description)
4175                 , m_primitiveType       (primType)
4176                 , m_spacing                     (spacing)
4177                 , m_winding                     (winding)
4178                 , m_usePointMode        (usePointMode)
4179         {
4180         }
4181
4182         void                                                                    init            (void);
4183         void                                                                    deinit          (void);
4184         IterateResult                                                   iterate         (void);
4185
4186 private:
4187         static vector<float>                                    generatePatchTessLevels (int numPatches, int constantOuterLevelIndex, float constantOuterLevel);
4188
4189         static const int                                                RENDER_SIZE = 16;
4190
4191         const TessPrimitiveType                                 m_primitiveType;
4192         const SpacingMode                                               m_spacing;
4193         const Winding                                                   m_winding;
4194         const bool                                                              m_usePointMode;
4195
4196         SharedPtr<const glu::ShaderProgram>             m_program;
4197 };
4198
4199 vector<float> SymmetricOuterEdgeCase::generatePatchTessLevels (int numPatches, int constantOuterLevelIndex, float constantOuterLevel)
4200 {
4201         de::Random rnd(123);
4202         return generateRandomPatchTessLevels(numPatches, constantOuterLevelIndex, constantOuterLevel, rnd);
4203 }
4204
4205 void SymmetricOuterEdgeCase::init (void)
4206 {
4207         checkTessellationSupport(m_context);
4208         checkRenderTargetSize(m_context.getRenderTarget(), RENDER_SIZE);
4209
4210         std::string vertexShaderTemplate                        ("${GLSL_VERSION_DECL}\n"
4211                                                                                                  "\n"
4212                                                                                                  "in highp float in_v_attr;\n"
4213                                                                                                  "out highp float in_tc_attr;\n"
4214                                                                                                  "\n"
4215                                                                                                  "void main (void)\n"
4216                                                                                                  "{\n"
4217                                                                                                  "      in_tc_attr = in_v_attr;\n"
4218                                                                                                  "}\n");
4219         std::string tessellationControlTemplate         ("${GLSL_VERSION_DECL}\n"
4220                                                                                                  "${TESSELLATION_SHADER_REQUIRE}\n"
4221                                                                                                  "\n"
4222                                                                                                  "layout (vertices = 1) out;\n"
4223                                                                                                  "\n"
4224                                                                                                  "in highp float in_tc_attr[];\n"
4225                                                                                                  "\n"
4226                                                                                                  "void main (void)\n"
4227                                                                                                  "{\n"
4228                                                                                                  "      gl_TessLevelInner[0] = in_tc_attr[0];\n"
4229                                                                                                  "      gl_TessLevelInner[1] = in_tc_attr[1];\n"
4230                                                                                                  "\n"
4231                                                                                                  "      gl_TessLevelOuter[0] = in_tc_attr[2];\n"
4232                                                                                                  "      gl_TessLevelOuter[1] = in_tc_attr[3];\n"
4233                                                                                                  "      gl_TessLevelOuter[2] = in_tc_attr[4];\n"
4234                                                                                                  "      gl_TessLevelOuter[3] = in_tc_attr[5];\n"
4235                                                                                                  "}\n");
4236         std::string tessellationEvaluationTemplate      ("${GLSL_VERSION_DECL}\n"
4237                                                                                                  "${TESSELLATION_SHADER_REQUIRE}\n"
4238                                                                                                  "\n"
4239                                                                                                  + getTessellationEvaluationInLayoutString(m_primitiveType, m_spacing, m_winding, m_usePointMode) +
4240                                                                                                  "\n"
4241                                                                                                  "out highp vec4 in_f_color;\n"
4242                                                                                                  "out highp vec4 out_te_tessCoord_isMirrored;\n"
4243                                                                                                  "\n"
4244                                                                                                  "void main (void)\n"
4245                                                                                                  "{\n"
4246                                                                                                  + (m_primitiveType == TESSPRIMITIVETYPE_TRIANGLES ?
4247                                                                                                         "       float x = gl_TessCoord.x;\n"
4248                                                                                                         "       float y = gl_TessCoord.y;\n"
4249                                                                                                         "       float z = gl_TessCoord.z;\n"
4250                                                                                                         "       // Mirror one half of each outer edge onto the other half, except the endpoints (because they belong to two edges)\n"
4251                                                                                                         "       out_te_tessCoord_isMirrored = z == 0.0 && x > 0.5 && x != 1.0 ? vec4(1.0-x,  1.0-y,    0.0, 1.0)\n"
4252                                                                                                         "                                   : y == 0.0 && z > 0.5 && z != 1.0 ? vec4(1.0-x,    0.0,  1.0-z, 1.0)\n"
4253                                                                                                         "                                   : x == 0.0 && y > 0.5 && y != 1.0 ? vec4(  0.0,  1.0-y,  1.0-z, 1.0)\n"
4254                                                                                                         "                                   : vec4(x, y, z, 0.0);\n"
4255                                                                                                   : m_primitiveType == TESSPRIMITIVETYPE_QUADS ?
4256                                                                                                         "       float x = gl_TessCoord.x;\n"
4257                                                                                                         "       float y = gl_TessCoord.y;\n"
4258                                                                                                         "       // Mirror one half of each outer edge onto the other half, except the endpoints (because they belong to two edges)\n"
4259                                                                                                         "       out_te_tessCoord_isMirrored = (x == 0.0 || x == 1.0) && y > 0.5 && y != 1.0 ? vec4(    x, 1.0-y, 0.0, 1.0)\n"
4260                                                                                                         "                                   : (y == 0.0 || y == 1.0) && x > 0.5 && x != 1.0 ? vec4(1.0-x,     y, 0.0, 1.0)\n"
4261                                                                                                         "                                   : vec4(x, y, 0.0, 0.0);\n"
4262                                                                                                   : m_primitiveType == TESSPRIMITIVETYPE_ISOLINES ?
4263                                                                                                         "       float x = gl_TessCoord.x;\n"
4264                                                                                                         "       float y = gl_TessCoord.y;\n"
4265                                                                                                         "       // Mirror one half of each outer edge onto the other half\n"
4266                                                                                                         "       out_te_tessCoord_isMirrored = (x == 0.0 || x == 1.0) && y > 0.5 ? vec4(x, 1.0-y, 0.0, 1.0)\n"
4267                                                                                                         "                                   : vec4(x, y, 0.0, 0.0f);\n"
4268                                                                                                   : DE_NULL) +
4269                                                                                                  "\n"
4270                                                                                                  "      gl_Position = vec4(gl_TessCoord.xy, 0.0, 1.0);\n"
4271                                                                                                  "      in_f_color = vec4(1.0);\n"
4272                                                                                                  "}\n");
4273         std::string fragmentShaderTemplate                      ("${GLSL_VERSION_DECL}\n"
4274                                                                                                  "\n"
4275                                                                                                  "layout (location = 0) out mediump vec4 o_color;\n"
4276                                                                                                  "\n"
4277                                                                                                  "in highp vec4 in_f_color;\n"
4278                                                                                                  "\n"
4279                                                                                                  "void main (void)\n"
4280                                                                                                  "{\n"
4281                                                                                                  "      o_color = in_f_color;\n"
4282                                                                                                  "}\n");
4283
4284         m_program = SharedPtr<const ShaderProgram>(new ShaderProgram(m_context.getRenderContext(), glu::ProgramSources()
4285                 << glu::VertexSource                                    (specializeShader(m_context, vertexShaderTemplate.c_str()))
4286                 << glu::TessellationControlSource               (specializeShader(m_context, tessellationControlTemplate.c_str()))
4287                 << glu::TessellationEvaluationSource    (specializeShader(m_context, tessellationEvaluationTemplate.c_str()))
4288                 << glu::FragmentSource                                  (specializeShader(m_context, fragmentShaderTemplate.c_str()))
4289                 << glu::TransformFeedbackVarying                ("out_te_tessCoord_isMirrored")
4290                 << glu::TransformFeedbackMode                   (GL_INTERLEAVED_ATTRIBS)));
4291
4292         m_testCtx.getLog() << *m_program;
4293         if (!m_program->isOk())
4294                 TCU_FAIL("Program compilation failed");
4295 }
4296
4297 void SymmetricOuterEdgeCase::deinit (void)
4298 {
4299         m_program.clear();
4300 }
4301
4302 SymmetricOuterEdgeCase::IterateResult SymmetricOuterEdgeCase::iterate (void)
4303 {
4304         typedef TransformFeedbackHandler<Vec4> TFHandler;
4305
4306         TestLog&                                                        log                                                     = m_testCtx.getLog();
4307         const RenderContext&                            renderCtx                                       = m_context.getRenderContext();
4308         const RandomViewport                            viewport                                        (renderCtx.getRenderTarget(), RENDER_SIZE, RENDER_SIZE, deStringHash(getName()));
4309         const glw::Functions&                           gl                                                      = renderCtx.getFunctions();
4310
4311         static const float                                      singleOuterEdgeLevels[]         = { 1.0f, 1.2f, 1.9f, 2.3f, 2.8f, 3.3f, 3.8f, 10.2f, 1.6f, 24.4f, 24.7f, 63.0f };
4312         const vector<OuterEdgeDescription>      edgeDescriptions                        = outerEdgeDescriptions(m_primitiveType);
4313
4314         {
4315                 // Compute the number vertices in the largest draw call, so we can allocate the TF buffer just once.
4316                 int maxNumVerticesInDrawCall;
4317                 {
4318                         const vector<float> patchTessLevels = generatePatchTessLevels(1, 0 /* outer-edge index doesn't affect vertex count */, arrayMax(singleOuterEdgeLevels));
4319                         maxNumVerticesInDrawCall = referenceVertexCount(m_primitiveType, m_spacing, m_usePointMode, &patchTessLevels[0], &patchTessLevels[2]);
4320                 }
4321
4322                 {
4323                         const TFHandler tfHandler(m_context.getRenderContext(), maxNumVerticesInDrawCall);
4324
4325                         setViewport(gl, viewport);
4326                         gl.patchParameteri(GL_PATCH_VERTICES, 6);
4327
4328                         for (int outerEdgeIndex = 0; outerEdgeIndex < (int)edgeDescriptions.size(); outerEdgeIndex++)
4329                         {
4330                                 const OuterEdgeDescription& edgeDesc = edgeDescriptions[outerEdgeIndex];
4331
4332                                 for (int outerEdgeLevelCaseNdx = 0; outerEdgeLevelCaseNdx < DE_LENGTH_OF_ARRAY(singleOuterEdgeLevels); outerEdgeLevelCaseNdx++)
4333                                 {
4334                                         typedef std::set<Vec3, VecLexLessThan<3> > Vec3Set;
4335
4336                                         const vector<float>                             patchTessLevels         = generatePatchTessLevels(1, outerEdgeIndex, singleOuterEdgeLevels[outerEdgeLevelCaseNdx]);
4337                                         const glu::VertexArrayBinding   bindings[]                      = { glu::va::Float("in_v_attr", 1, (int)patchTessLevels.size(), 0, &patchTessLevels[0]) };
4338
4339                                         log << TestLog::Message << "Testing with outer tessellation level " << singleOuterEdgeLevels[outerEdgeLevelCaseNdx]
4340                                                                                         << " for the " << edgeDesc.description() << " edge, and with various levels for other edges" << TestLog::EndMessage;
4341
4342                                         {
4343                                                 const deUint32 programGL = m_program->getProgram();
4344
4345                                                 gl.useProgram(programGL);
4346
4347                                                 {
4348                                                         const TFHandler::Result         tfResult                = tfHandler.renderAndGetPrimitives(programGL, outputPrimitiveTypeGL(m_primitiveType, m_usePointMode),
4349                                                                                                                                                                                                                    DE_LENGTH_OF_ARRAY(bindings), &bindings[0], (int)patchTessLevels.size());
4350                                                         const int                                       refNumVertices  = referenceVertexCount(m_primitiveType, m_spacing, m_usePointMode, &patchTessLevels[0], &patchTessLevels[2]);
4351
4352                                                         if ((int)tfResult.varying.size() != refNumVertices)
4353                                                         {
4354                                                                 log << TestLog::Message << "Failure: the number of vertices returned by transform feedback is "
4355                                                                                                                 << tfResult.varying.size() << ", expected " << refNumVertices << TestLog::EndMessage
4356                                                                         << TestLog::Message << "Note: rendered 1 patch, tessellation levels are (in order [inner0, inner1, outer0, outer1, outer2, outer3]):\n"
4357                                                                                                                 << containerStr(patchTessLevels, 6) << TestLog::EndMessage;
4358
4359                                                                 m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "Invalid set of vertices");
4360                                                                 return STOP;
4361                                                         }
4362
4363                                                         // Check the vertices.
4364
4365                                                         {
4366                                                                 Vec3Set nonMirroredEdgeVertices;
4367                                                                 Vec3Set mirroredEdgeVertices;
4368
4369                                                                 // We're interested in just the vertices on the current outer edge.
4370                                                                 for(int vtxNdx = 0; vtxNdx < refNumVertices; vtxNdx++)
4371                                                                 {
4372                                                                         const Vec3& vtx = tfResult.varying[vtxNdx].swizzle(0,1,2);
4373                                                                         if (edgeDesc.contains(vtx))
4374                                                                         {
4375                                                                                 // Ignore the middle vertex of the outer edge, as it's exactly at the mirroring point;
4376                                                                                 // for isolines, also ignore (0, 0) and (1, 0) because there's no mirrored counterpart for them.
4377                                                                                 if (m_primitiveType == TESSPRIMITIVETYPE_TRIANGLES && vtx == tcu::select(Vec3(0.0f), Vec3(0.5f), singleTrueMask<3>(edgeDesc.constantCoordinateIndex)))
4378                                                                                         continue;
4379                                                                                 if (m_primitiveType == TESSPRIMITIVETYPE_QUADS && vtx.swizzle(0,1) == tcu::select(Vec2(edgeDesc.constantCoordinateValueChoices[0]),
4380                                                                                                                                                                                                                                                            Vec2(0.5f),
4381                                                                                                                                                                                                                                                            singleTrueMask<2>(edgeDesc.constantCoordinateIndex)))
4382                                                                                         continue;
4383                                                                                 if (m_primitiveType == TESSPRIMITIVETYPE_ISOLINES && (vtx == Vec3(0.0f, 0.5f, 0.0f) || vtx == Vec3(1.0f, 0.5f, 0.0f) ||
4384                                                                                                                                                                                           vtx == Vec3(0.0f, 0.0f, 0.0f) || vtx == Vec3(1.0f, 0.0f, 0.0f)))
4385                                                                                         continue;
4386
4387                                                                                 const bool isMirrored = tfResult.varying[vtxNdx].w() > 0.5f;
4388                                                                                 if (isMirrored)
4389                                                                                         mirroredEdgeVertices.insert(vtx);
4390                                                                                 else
4391                                                                                         nonMirroredEdgeVertices.insert(vtx);
4392                                                                         }
4393                                                                 }
4394
4395                                                                 if (m_primitiveType != TESSPRIMITIVETYPE_ISOLINES)
4396                                                                 {
4397                                                                         // Check that both endpoints are present. Note that endpoints aren't mirrored by the shader, since they belong to more than one edge.
4398
4399                                                                         Vec3 endpointA;
4400                                                                         Vec3 endpointB;
4401
4402                                                                         if (m_primitiveType == TESSPRIMITIVETYPE_TRIANGLES)
4403                                                                         {
4404                                                                                 endpointA = tcu::select(Vec3(1.0f), Vec3(0.0f), singleTrueMask<3>((edgeDesc.constantCoordinateIndex + 1) % 3));
4405                                                                                 endpointB = tcu::select(Vec3(1.0f), Vec3(0.0f), singleTrueMask<3>((edgeDesc.constantCoordinateIndex + 2) % 3));
4406                                                                         }
4407                                                                         else if (m_primitiveType == TESSPRIMITIVETYPE_QUADS)
4408                                                                         {
4409                                                                                 endpointA.xy() = tcu::select(Vec2(edgeDesc.constantCoordinateValueChoices[0]), Vec2(0.0f), singleTrueMask<2>(edgeDesc.constantCoordinateIndex));
4410                                                                                 endpointB.xy() = tcu::select(Vec2(edgeDesc.constantCoordinateValueChoices[0]), Vec2(1.0f), singleTrueMask<2>(edgeDesc.constantCoordinateIndex));
4411                                                                         }
4412                                                                         else
4413                                                                                 DE_ASSERT(false);
4414
4415                                                                         if (!contains(nonMirroredEdgeVertices, endpointA) ||
4416                                                                                 !contains(nonMirroredEdgeVertices, endpointB))
4417                                                                         {
4418                                                                                 log << TestLog::Message << "Failure: edge doesn't contain both endpoints, " << endpointA << " and " << endpointB << TestLog::EndMessage
4419                                                                                         << TestLog::Message << "Note: non-mirrored vertices:\n" << containerStr(nonMirroredEdgeVertices, 5)
4420                                                                                                                                 << "\nmirrored vertices:\n" << containerStr(mirroredEdgeVertices, 5) << TestLog::EndMessage;
4421                                                                                 m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "Invalid set of vertices");
4422                                                                                 return STOP;
4423                                                                         }
4424                                                                         nonMirroredEdgeVertices.erase(endpointA);
4425                                                                         nonMirroredEdgeVertices.erase(endpointB);
4426                                                                 }
4427
4428                                                                 if (nonMirroredEdgeVertices != mirroredEdgeVertices)
4429                                                                 {
4430                                                                         log << TestLog::Message << "Failure: the set of mirrored edges isn't equal to the set of non-mirrored edges (ignoring endpoints and possible middle)" << TestLog::EndMessage
4431                                                                                 << TestLog::Message << "Note: non-mirrored vertices:\n" << containerStr(nonMirroredEdgeVertices, 5)
4432                                                                                                                                 << "\nmirrored vertices:\n" << containerStr(mirroredEdgeVertices, 5) << TestLog::EndMessage;
4433                                                                         m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "Invalid set of vertices");
4434                                                                         return STOP;
4435                                                                 }
4436                                                         }
4437                                                 }
4438                                         }
4439                                 }
4440                         }
4441                 }
4442         }
4443
4444         m_testCtx.setTestResult(QP_TEST_RESULT_PASS, "Pass");
4445         return STOP;
4446 }
4447
4448 /*--------------------------------------------------------------------*//*!
4449  * \brief Test invariance rule #4
4450  *
4451  * Test that the vertices on an outer edge don't depend on which of the
4452  * edges it is, other than with respect to component order.
4453  *//*--------------------------------------------------------------------*/
4454 class OuterEdgeVertexSetIndexIndependenceCase : public TestCase
4455 {
4456 public:
4457         OuterEdgeVertexSetIndexIndependenceCase (Context& context, const char* name, const char* description, TessPrimitiveType primType, SpacingMode spacing, Winding winding, bool usePointMode)
4458                 : TestCase                      (context, name, description)
4459                 , m_primitiveType       (primType)
4460                 , m_spacing                     (spacing)
4461                 , m_winding                     (winding)
4462                 , m_usePointMode        (usePointMode)
4463         {
4464                 DE_ASSERT(primType == TESSPRIMITIVETYPE_TRIANGLES || primType == TESSPRIMITIVETYPE_QUADS);
4465         }
4466
4467         void                                                                    init            (void);
4468         void                                                                    deinit          (void);
4469         IterateResult                                                   iterate         (void);
4470
4471 private:
4472         static vector<float>                                    generatePatchTessLevels (int numPatches, int constantOuterLevelIndex, float constantOuterLevel);
4473
4474         static const int                                                RENDER_SIZE = 16;
4475
4476         const TessPrimitiveType                                 m_primitiveType;
4477         const SpacingMode                                               m_spacing;
4478         const Winding                                                   m_winding;
4479         const bool                                                              m_usePointMode;
4480
4481         SharedPtr<const glu::ShaderProgram>             m_program;
4482 };
4483
4484 vector<float> OuterEdgeVertexSetIndexIndependenceCase::generatePatchTessLevels (int numPatches, int constantOuterLevelIndex, float constantOuterLevel)
4485 {
4486         de::Random rnd(123);
4487         return generateRandomPatchTessLevels(numPatches, constantOuterLevelIndex, constantOuterLevel, rnd);
4488 }
4489
4490 void OuterEdgeVertexSetIndexIndependenceCase::init (void)
4491 {
4492         checkTessellationSupport(m_context);
4493         checkRenderTargetSize(m_context.getRenderTarget(), RENDER_SIZE);
4494
4495         std::string vertexShaderTemplate                        ("${GLSL_VERSION_DECL}\n"
4496                                                                                                  "\n"
4497                                                                                                  "in highp float in_v_attr;\n"
4498                                                                                                  "out highp float in_tc_attr;\n"
4499                                                                                                  "\n"
4500                                                                                                  "void main (void)\n"
4501                                                                                                  "{\n"
4502                                                                                                  "      in_tc_attr = in_v_attr;\n"
4503                                                                                                  "}\n");
4504         std::string tessellationControlTemplate         ("${GLSL_VERSION_DECL}\n"
4505                                                                                                  "${TESSELLATION_SHADER_REQUIRE}\n"
4506                                                                                                  "\n"
4507                                                                                                  "layout (vertices = 1) out;\n"
4508                                                                                                  "\n"
4509                                                                                                  "in highp float in_tc_attr[];\n"
4510                                                                                                  "\n"
4511                                                                                                  "void main (void)\n"
4512                                                                                                  "{\n"
4513                                                                                                  "      gl_TessLevelInner[0] = in_tc_attr[0];\n"
4514                                                                                                  "      gl_TessLevelInner[1] = in_tc_attr[1];\n"
4515                                                                                                  "\n"
4516                                                                                                  "      gl_TessLevelOuter[0] = in_tc_attr[2];\n"
4517                                                                                                  "      gl_TessLevelOuter[1] = in_tc_attr[3];\n"
4518                                                                                                  "      gl_TessLevelOuter[2] = in_tc_attr[4];\n"
4519                                                                                                  "      gl_TessLevelOuter[3] = in_tc_attr[5];\n"
4520                                                                                                  "}\n");
4521         std::string tessellationEvaluationTemplate      ("${GLSL_VERSION_DECL}\n"
4522                                                                                                  "${TESSELLATION_SHADER_REQUIRE}\n"
4523                                                                                                  "\n"
4524                                                                                                  + getTessellationEvaluationInLayoutString(m_primitiveType, m_spacing, m_winding, m_usePointMode) +
4525                                                                                                  "\n"
4526                                                                                                  "out highp vec4 in_f_color;\n"
4527                                                                                                  "out highp vec3 out_te_tessCoord;\n"
4528                                                                                                  "\n"
4529                                                                                                  "void main (void)\n"
4530                                                                                                  "{\n"
4531                                                                                                  "      out_te_tessCoord = gl_TessCoord;"
4532                                                                                                  "      gl_Position = vec4(gl_TessCoord.xy, 0.0, 1.0);\n"
4533                                                                                                  "      in_f_color = vec4(1.0);\n"
4534                                                                                                  "}\n");
4535         std::string fragmentShaderTemplate                      ("${GLSL_VERSION_DECL}\n"
4536                                                                                                  "\n"
4537                                                                                                  "layout (location = 0) out mediump vec4 o_color;\n"
4538                                                                                                  "\n"
4539                                                                                                  "in highp vec4 in_f_color;\n"
4540                                                                                                  "\n"
4541                                                                                                  "void main (void)\n"
4542                                                                                                  "{\n"
4543                                                                                                  "      o_color = in_f_color;\n"
4544                                                                                                  "}\n");
4545
4546         m_program = SharedPtr<const ShaderProgram>(new ShaderProgram(m_context.getRenderContext(), glu::ProgramSources()
4547                 << glu::VertexSource                                    (specializeShader(m_context, vertexShaderTemplate.c_str()))
4548                 << glu::TessellationControlSource               (specializeShader(m_context, tessellationControlTemplate.c_str()))
4549                 << glu::TessellationEvaluationSource    (specializeShader(m_context, tessellationEvaluationTemplate.c_str()))
4550                 << glu::FragmentSource                                  (specializeShader(m_context, fragmentShaderTemplate.c_str()))
4551                 << glu::TransformFeedbackVarying                ("out_te_tessCoord")
4552                 << glu::TransformFeedbackMode                   (GL_INTERLEAVED_ATTRIBS)));
4553
4554         m_testCtx.getLog() << *m_program;
4555         if (!m_program->isOk())
4556                 TCU_FAIL("Program compilation failed");
4557 }
4558
4559 void OuterEdgeVertexSetIndexIndependenceCase::deinit (void)
4560 {
4561         m_program.clear();
4562 }
4563
4564 OuterEdgeVertexSetIndexIndependenceCase::IterateResult OuterEdgeVertexSetIndexIndependenceCase::iterate (void)
4565 {
4566         typedef TransformFeedbackHandler<Vec3> TFHandler;
4567
4568         TestLog&                                                        log                                                     = m_testCtx.getLog();
4569         const RenderContext&                            renderCtx                                       = m_context.getRenderContext();
4570         const RandomViewport                            viewport                                        (renderCtx.getRenderTarget(), RENDER_SIZE, RENDER_SIZE, deStringHash(getName()));
4571         const glw::Functions&                           gl                                                      = renderCtx.getFunctions();
4572         const deUint32                                          programGL                                       = m_program->getProgram();
4573
4574         static const float                                      singleOuterEdgeLevels[]         = { 1.0f, 1.2f, 1.9f, 2.3f, 2.8f, 3.3f, 3.8f, 10.2f, 1.6f, 24.4f, 24.7f, 63.0f };
4575         const vector<OuterEdgeDescription>      edgeDescriptions                        = outerEdgeDescriptions(m_primitiveType);
4576
4577         gl.useProgram(programGL);
4578         setViewport(gl, viewport);
4579         gl.patchParameteri(GL_PATCH_VERTICES, 6);
4580
4581         {
4582                 // Compute the number vertices in the largest draw call, so we can allocate the TF buffer just once.
4583                 int maxNumVerticesInDrawCall = 0;
4584                 {
4585                         const vector<float> patchTessLevels = generatePatchTessLevels(1, 0 /* outer-edge index doesn't affect vertex count */, arrayMax(singleOuterEdgeLevels));
4586                         maxNumVerticesInDrawCall = referenceVertexCount(m_primitiveType, m_spacing, m_usePointMode, &patchTessLevels[0], &patchTessLevels[2]);
4587                 }
4588
4589                 {
4590                         const TFHandler tfHandler(m_context.getRenderContext(), maxNumVerticesInDrawCall);
4591
4592                         for (int outerEdgeLevelCaseNdx = 0; outerEdgeLevelCaseNdx < DE_LENGTH_OF_ARRAY(singleOuterEdgeLevels); outerEdgeLevelCaseNdx++)
4593                         {
4594                                 typedef std::set<Vec3, VecLexLessThan<3> > Vec3Set;
4595
4596                                 Vec3Set firstEdgeVertices;
4597
4598                                 for (int outerEdgeIndex = 0; outerEdgeIndex < (int)edgeDescriptions.size(); outerEdgeIndex++)
4599                                 {
4600                                         const OuterEdgeDescription&             edgeDesc                        = edgeDescriptions[outerEdgeIndex];
4601                                         const vector<float>                             patchTessLevels         = generatePatchTessLevels(1, outerEdgeIndex, singleOuterEdgeLevels[outerEdgeLevelCaseNdx]);
4602                                         const glu::VertexArrayBinding   bindings[]                      = { glu::va::Float("in_v_attr", 1, (int)patchTessLevels.size(), 0, &patchTessLevels[0]) };
4603
4604                                         log << TestLog::Message << "Testing with outer tessellation level " << singleOuterEdgeLevels[outerEdgeLevelCaseNdx]
4605                                                                                         << " for the " << edgeDesc.description() << " edge, and with various levels for other edges" << TestLog::EndMessage;
4606
4607                                         {
4608                                                 const TFHandler::Result         tfResult                = tfHandler.renderAndGetPrimitives(programGL, outputPrimitiveTypeGL(m_primitiveType, m_usePointMode),
4609                                                                                                                                                                                                                 DE_LENGTH_OF_ARRAY(bindings), &bindings[0], (int)patchTessLevels.size());
4610                                                 const int                                       refNumVertices  = referenceVertexCount(m_primitiveType, m_spacing, m_usePointMode, &patchTessLevels[0], &patchTessLevels[2]);
4611
4612                                                 if ((int)tfResult.varying.size() != refNumVertices)
4613                                                 {
4614                                                         log << TestLog::Message << "Failure: the number of vertices returned by transform feedback is "
4615                                                                                                         << tfResult.varying.size() << ", expected " << refNumVertices << TestLog::EndMessage
4616                                                                 << TestLog::Message << "Note: rendered 1 patch, tessellation levels are (in order [inner0, inner1, outer0, outer1, outer2, outer3]):\n"
4617                                                                                                         << containerStr(patchTessLevels, 6) << TestLog::EndMessage;
4618
4619                                                         m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "Invalid set of vertices");
4620                                                         return STOP;
4621                                                 }
4622
4623                                                 {
4624                                                         Vec3Set currentEdgeVertices;
4625
4626                                                         // Get the vertices on the current outer edge.
4627                                                         for(int vtxNdx = 0; vtxNdx < refNumVertices; vtxNdx++)
4628                                                         {
4629                                                                 const Vec3& vtx = tfResult.varying[vtxNdx];
4630                                                                 if (edgeDesc.contains(vtx))
4631                                                                 {
4632                                                                         // Swizzle components to match the order of the first edge.
4633                                                                         if (m_primitiveType == TESSPRIMITIVETYPE_TRIANGLES)
4634                                                                         {
4635                                                                                 currentEdgeVertices.insert(outerEdgeIndex == 0 ? vtx
4636                                                                                                                                         : outerEdgeIndex == 1 ? vtx.swizzle(1, 0, 2)
4637                                                                                                                                         : outerEdgeIndex == 2 ? vtx.swizzle(2, 1, 0)
4638                                                                                                                                         : Vec3(-1.0f));
4639                                                                         }
4640                                                                         else if (m_primitiveType == TESSPRIMITIVETYPE_QUADS)
4641                                                                         {
4642                                                                                 currentEdgeVertices.insert(Vec3(outerEdgeIndex == 0 ? vtx.y()
4643                                                                                                                                                 : outerEdgeIndex == 1 ? vtx.x()
4644                                                                                                                                                 : outerEdgeIndex == 2 ? vtx.y()
4645                                                                                                                                                 : outerEdgeIndex == 3 ? vtx.x()
4646                                                                                                                                                 : -1.0f,
4647                                                                                                                                                 0.0f, 0.0f));
4648                                                                         }
4649                                                                         else
4650                                                                                 DE_ASSERT(false);
4651                                                                 }
4652                                                         }
4653
4654                                                         if (outerEdgeIndex == 0)
4655                                                                 firstEdgeVertices = currentEdgeVertices;
4656                                                         else
4657                                                         {
4658                                                                 // Compare vertices of this edge to those of the first edge.
4659
4660                                                                 if (currentEdgeVertices != firstEdgeVertices)
4661                                                                 {
4662                                                                         const char* const swizzleDesc = m_primitiveType == TESSPRIMITIVETYPE_TRIANGLES ? (outerEdgeIndex == 1 ? "(y, x, z)"
4663                                                                                                                                                                                                                                         : outerEdgeIndex == 2 ? "(z, y, x)"
4664                                                                                                                                                                                                                                         : DE_NULL)
4665                                                                                                                                         : m_primitiveType == TESSPRIMITIVETYPE_QUADS ? (outerEdgeIndex == 1 ? "(x, 0)"
4666                                                                                                                                                                                                                                 : outerEdgeIndex == 2 ? "(y, 0)"
4667                                                                                                                                                                                                                                 : outerEdgeIndex == 3 ? "(x, 0)"
4668                                                                                                                                                                                                                                 : DE_NULL)
4669                                                                                                                                         : DE_NULL;
4670
4671                                                                         log << TestLog::Message << "Failure: the set of vertices on the " << edgeDesc.description() << " edge"
4672                                                                                                                         << " doesn't match the set of vertices on the " << edgeDescriptions[0].description() << " edge" << TestLog::EndMessage
4673                                                                                 << TestLog::Message << "Note: set of vertices on " << edgeDesc.description() << " edge, components swizzled like " << swizzleDesc
4674                                                                                                                         << " to match component order on first edge:\n" << containerStr(currentEdgeVertices, 5)
4675                                                                                                                         << "\non " << edgeDescriptions[0].description() << " edge:\n" << containerStr(firstEdgeVertices, 5) << TestLog::EndMessage;
4676                                                                         m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "Invalid set of vertices");
4677                                                                         return STOP;
4678                                                                 }
4679                                                         }
4680                                                 }
4681                                         }
4682                                 }
4683                         }
4684                 }
4685         }
4686
4687         m_testCtx.setTestResult(QP_TEST_RESULT_PASS, "Pass");
4688         return STOP;
4689 }
4690
4691 /*--------------------------------------------------------------------*//*!
4692  * \brief Test invariance rule #5
4693  *
4694  * Test that the set of triangles input to the TES only depends on the
4695  * tessellation levels, tessellation mode and spacing mode. Specifically,
4696  * winding doesn't change the set of triangles, though it can change the
4697  * order in which they are input to TES, and can (and will) change the
4698  * vertex order within a triangle.
4699  *//*--------------------------------------------------------------------*/
4700 class InvariantTriangleSetCase : public PrimitiveSetInvarianceCase
4701 {
4702 public:
4703         InvariantTriangleSetCase (Context& context, const char* name, const char* description, TessPrimitiveType primType, SpacingMode spacing)
4704                 : PrimitiveSetInvarianceCase(context, name, description, primType, spacing, false, WINDINGUSAGE_VARY)
4705         {
4706                 DE_ASSERT(primType == TESSPRIMITIVETYPE_TRIANGLES || primType == TESSPRIMITIVETYPE_QUADS);
4707         }
4708
4709 protected:
4710         virtual bool compare (const vector<Vec3>& coordsA, const vector<Vec3>& coordsB, int) const
4711         {
4712                 return compareTriangleSets(coordsA, coordsB, m_testCtx.getLog());
4713         }
4714 };
4715
4716 /*--------------------------------------------------------------------*//*!
4717  * \brief Test invariance rule #6
4718  *
4719  * Test that the set of inner triangles input to the TES only depends on
4720  * the inner tessellation levels, tessellation mode and spacing mode.
4721  *//*--------------------------------------------------------------------*/
4722 class InvariantInnerTriangleSetCase : public PrimitiveSetInvarianceCase
4723 {
4724 public:
4725         InvariantInnerTriangleSetCase (Context& context, const char* name, const char* description, TessPrimitiveType primType, SpacingMode spacing)
4726                 : PrimitiveSetInvarianceCase(context, name, description, primType, spacing, false, WINDINGUSAGE_VARY)
4727         {
4728                 DE_ASSERT(primType == TESSPRIMITIVETYPE_TRIANGLES || primType == TESSPRIMITIVETYPE_QUADS);
4729         }
4730
4731 protected:
4732         virtual vector<LevelCase> genTessLevelCases (void) const
4733         {
4734                 const int                                       numSubCases             = 4;
4735                 const vector<LevelCase>         baseResults             = PrimitiveSetInvarianceCase::genTessLevelCases();
4736                 vector<LevelCase>                       result;
4737                 de::Random                                      rnd                             (123);
4738
4739                 // Generate variants with different values for irrelevant levels.
4740                 for (int baseNdx = 0; baseNdx < (int)baseResults.size(); baseNdx++)
4741                 {
4742                         const TessLevels&       base    = baseResults[baseNdx].levels[0];
4743                         TessLevels                      levels  = base;
4744                         LevelCase                       levelCase;
4745
4746                         for (int subNdx = 0; subNdx < numSubCases; subNdx++)
4747                         {
4748                                 levelCase.levels.push_back(levels);
4749
4750                                 for (int i = 0; i < DE_LENGTH_OF_ARRAY(levels.outer); i++)
4751                                         levels.outer[i] = rnd.getFloat(2.0f, 16.0f);
4752                                 if (m_primitiveType == TESSPRIMITIVETYPE_TRIANGLES)
4753                                         levels.inner[1] = rnd.getFloat(2.0f, 16.0f);
4754                         }
4755
4756                         result.push_back(levelCase);
4757                 }
4758
4759                 return result;
4760         }
4761
4762         struct IsInnerTriangleTriangle
4763         {
4764                 bool operator() (const Vec3* vertices) const
4765                 {
4766                         for (int v = 0; v < 3; v++)
4767                                 for (int c = 0; c < 3; c++)
4768                                         if (vertices[v][c] == 0.0f)
4769                                                 return false;
4770                         return true;
4771                 }
4772         };
4773
4774         struct IsInnerQuadTriangle
4775         {
4776                 bool operator() (const Vec3* vertices) const
4777                 {
4778                         for (int v = 0; v < 3; v++)
4779                                 for (int c = 0; c < 2; c++)
4780                                         if (vertices[v][c] == 0.0f || vertices[v][c] == 1.0f)
4781                                                 return false;
4782                         return true;
4783                 }
4784         };
4785
4786         virtual bool compare (const vector<Vec3>& coordsA, const vector<Vec3>& coordsB, int) const
4787         {
4788                 if (m_primitiveType == TESSPRIMITIVETYPE_TRIANGLES)
4789                         return compareTriangleSets(coordsA, coordsB, m_testCtx.getLog(), IsInnerTriangleTriangle(), "outer triangles");
4790                 else if (m_primitiveType == TESSPRIMITIVETYPE_QUADS)
4791                         return compareTriangleSets(coordsA, coordsB, m_testCtx.getLog(), IsInnerQuadTriangle(), "outer triangles");
4792                 else
4793                 {
4794                         DE_ASSERT(false);
4795                         return false;
4796                 }
4797         }
4798 };
4799
4800 /*--------------------------------------------------------------------*//*!
4801  * \brief Test invariance rule #7
4802  *
4803  * Test that the set of outer triangles input to the TES only depends on
4804  * tessellation mode, spacing mode and the inner and outer tessellation
4805  * levels corresponding to the inner and outer edges relevant to that
4806  * triangle.
4807  *//*--------------------------------------------------------------------*/
4808 class InvariantOuterTriangleSetCase : public PrimitiveSetInvarianceCase
4809 {
4810 public:
4811         InvariantOuterTriangleSetCase (Context& context, const char* name, const char* description, TessPrimitiveType primType, SpacingMode spacing)
4812                 : PrimitiveSetInvarianceCase(context, name, description, primType, spacing, false, WINDINGUSAGE_VARY)
4813         {
4814                 DE_ASSERT(primType == TESSPRIMITIVETYPE_TRIANGLES || primType == TESSPRIMITIVETYPE_QUADS);
4815         }
4816
4817 protected:
4818         virtual vector<LevelCase> genTessLevelCases (void) const
4819         {
4820                 const int                                       numSubCasesPerEdge      = 4;
4821                 const int                                       numEdges                        = m_primitiveType == TESSPRIMITIVETYPE_TRIANGLES        ? 3
4822                                                                                                                 : m_primitiveType == TESSPRIMITIVETYPE_QUADS            ? 4
4823                                                                                                                 : -1;
4824                 const vector<LevelCase>         baseResult                      = PrimitiveSetInvarianceCase::genTessLevelCases();
4825                 vector<LevelCase>                       result;
4826                 de::Random                                      rnd                                     (123);
4827
4828                 // Generate variants with different values for irrelevant levels.
4829                 for (int baseNdx = 0; baseNdx < (int)baseResult.size(); baseNdx++)
4830                 {
4831                         const TessLevels& base = baseResult[baseNdx].levels[0];
4832                         if (base.inner[0] == 1.0f || (m_primitiveType == TESSPRIMITIVETYPE_QUADS && base.inner[1] == 1.0f))
4833                                 continue;
4834
4835                         for (int edgeNdx = 0; edgeNdx < numEdges; edgeNdx++)
4836                         {
4837                                 TessLevels      levels = base;
4838                                 LevelCase       levelCase;
4839                                 levelCase.mem = edgeNdx;
4840
4841                                 for (int subCaseNdx = 0; subCaseNdx < numSubCasesPerEdge; subCaseNdx++)
4842                                 {
4843                                         levelCase.levels.push_back(levels);
4844
4845                                         for (int i = 0; i < DE_LENGTH_OF_ARRAY(levels.outer); i++)
4846                                         {
4847                                                 if (i != edgeNdx)
4848                                                         levels.outer[i] = rnd.getFloat(2.0f, 16.0f);
4849                                         }
4850
4851                                         if (m_primitiveType == TESSPRIMITIVETYPE_TRIANGLES)
4852                                                 levels.inner[1] = rnd.getFloat(2.0f, 16.0f);
4853                                 }
4854
4855                                 result.push_back(levelCase);
4856                         }
4857                 }
4858
4859                 return result;
4860         }
4861
4862         class IsTriangleTriangleOnOuterEdge
4863         {
4864         public:
4865                 IsTriangleTriangleOnOuterEdge (int edgeNdx) : m_edgeNdx(edgeNdx) {}
4866                 bool operator() (const Vec3* vertices) const
4867                 {
4868                         bool touchesAppropriateEdge = false;
4869                         for (int v = 0; v < 3; v++)
4870                                 if (vertices[v][m_edgeNdx] == 0.0f)
4871                                         touchesAppropriateEdge = true;
4872
4873                         if (touchesAppropriateEdge)
4874                         {
4875                                 const Vec3 avg = (vertices[0] + vertices[1] + vertices[2]) / 3.0f;
4876                                 return avg[m_edgeNdx] < avg[(m_edgeNdx+1)%3] &&
4877                                            avg[m_edgeNdx] < avg[(m_edgeNdx+2)%3];
4878                         }
4879                         return false;
4880                 }
4881
4882         private:
4883                 int m_edgeNdx;
4884         };
4885
4886         class IsQuadTriangleOnOuterEdge
4887         {
4888         public:
4889                 IsQuadTriangleOnOuterEdge (int edgeNdx) : m_edgeNdx(edgeNdx) {}
4890
4891                 bool onEdge (const Vec3& v) const
4892                 {
4893                         return v[m_edgeNdx%2] == (m_edgeNdx <= 1 ? 0.0f : 1.0f);
4894                 }
4895
4896                 static inline bool onAnyEdge (const Vec3& v)
4897                 {
4898                         return v[0] == 0.0f || v[0] == 1.0f || v[1] == 0.0f || v[1] == 1.0f;
4899                 }
4900
4901                 bool operator() (const Vec3* vertices) const
4902                 {
4903                         for (int v = 0; v < 3; v++)
4904                         {
4905                                 const Vec3& a = vertices[v];
4906                                 const Vec3& b = vertices[(v+1)%3];
4907                                 const Vec3& c = vertices[(v+2)%3];
4908                                 if (onEdge(a) && onEdge(b))
4909                                         return true;
4910                                 if (onEdge(c) && !onAnyEdge(a) && !onAnyEdge(b) && a[m_edgeNdx%2] == b[m_edgeNdx%2])
4911                                         return true;
4912                         }
4913
4914                         return false;
4915                 }
4916
4917         private:
4918                 int m_edgeNdx;
4919         };
4920
4921         virtual bool compare (const vector<Vec3>& coordsA, const vector<Vec3>& coordsB, int outerEdgeNdx) const
4922         {
4923                 if (m_primitiveType == TESSPRIMITIVETYPE_TRIANGLES)
4924                 {
4925                         return compareTriangleSets(coordsA, coordsB, m_testCtx.getLog(),
4926                                                                            IsTriangleTriangleOnOuterEdge(outerEdgeNdx),
4927                                                                            ("inner triangles, and outer triangles corresponding to other edge than edge "
4928                                                                                 + outerEdgeDescriptions(m_primitiveType)[outerEdgeNdx].description()).c_str());
4929                 }
4930                 else if (m_primitiveType == TESSPRIMITIVETYPE_QUADS)
4931                 {
4932                         return compareTriangleSets(coordsA, coordsB, m_testCtx.getLog(),
4933                                                                            IsQuadTriangleOnOuterEdge(outerEdgeNdx),
4934                                                                            ("inner triangles, and outer triangles corresponding to other edge than edge "
4935                                                                                 + outerEdgeDescriptions(m_primitiveType)[outerEdgeNdx].description()).c_str());
4936                 }
4937                 else
4938                         DE_ASSERT(false);
4939
4940                 return true;
4941         }
4942 };
4943
4944 /*--------------------------------------------------------------------*//*!
4945  * \brief Base class for testing individual components of tess coords
4946  *
4947  * Useful for testing parts of invariance rule #8.
4948  *//*--------------------------------------------------------------------*/
4949 class TessCoordComponentInvarianceCase : public TestCase
4950 {
4951 public:
4952         TessCoordComponentInvarianceCase (Context& context, const char* name, const char* description, TessPrimitiveType primType, SpacingMode spacing, Winding winding, bool usePointMode)
4953                 : TestCase                      (context, name, description)
4954                 , m_primitiveType       (primType)
4955                 , m_spacing                     (spacing)
4956                 , m_winding                     (winding)
4957                 , m_usePointMode        (usePointMode)
4958         {
4959         }
4960
4961         void                                                                    init            (void);
4962         void                                                                    deinit          (void);
4963         IterateResult                                                   iterate         (void);
4964
4965 protected:
4966         virtual string                                                  tessEvalOutputComponentStatements       (const char* tessCoordComponentName, const char* outputComponentName) const = 0;
4967         virtual bool                                                    checkTessCoordComponent                         (float component) const = 0;
4968
4969 private:
4970         static vector<float>                                    genTessLevelCases (int numCases);
4971
4972         static const int                                                RENDER_SIZE = 16;
4973
4974         const TessPrimitiveType                                 m_primitiveType;
4975         const SpacingMode                                               m_spacing;
4976         const Winding                                                   m_winding;
4977         const bool                                                              m_usePointMode;
4978
4979         SharedPtr<const glu::ShaderProgram>             m_program;
4980 };
4981
4982 void TessCoordComponentInvarianceCase::init (void)
4983 {
4984         checkTessellationSupport(m_context);
4985         checkRenderTargetSize(m_context.getRenderTarget(), RENDER_SIZE);
4986
4987         std::string vertexShaderTemplate                        ("${GLSL_VERSION_DECL}\n"
4988                                                                                                  "\n"
4989                                                                                                  "in highp float in_v_attr;\n"
4990                                                                                                  "out highp float in_tc_attr;\n"
4991                                                                                                  "\n"
4992                                                                                                  "void main (void)\n"
4993                                                                                                  "{\n"
4994                                                                                                  "      in_tc_attr = in_v_attr;\n"
4995                                                                                                  "}\n");
4996         std::string tessellationControlTemplate         ("${GLSL_VERSION_DECL}\n"
4997                                                                                                  "${TESSELLATION_SHADER_REQUIRE}\n"
4998                                                                                                  "\n"
4999                                                                                                  "layout (vertices = 1) out;\n"
5000                                                                                                  "\n"
5001                                                                                                  "in highp float in_tc_attr[];\n"
5002                                                                                                  "\n"
5003                                                                                                  "void main (void)\n"
5004                                                                                                  "{\n"
5005                                                                                                  "      gl_TessLevelInner[0] = in_tc_attr[0];\n"
5006                                                                                                  "      gl_TessLevelInner[1] = in_tc_attr[1];\n"
5007                                                                                                  "\n"
5008                                                                                                  "      gl_TessLevelOuter[0] = in_tc_attr[2];\n"
5009                                                                                                  "      gl_TessLevelOuter[1] = in_tc_attr[3];\n"
5010                                                                                                  "      gl_TessLevelOuter[2] = in_tc_attr[4];\n"
5011                                                                                                  "      gl_TessLevelOuter[3] = in_tc_attr[5];\n"
5012                                                                                                  "}\n");
5013         std::string tessellationEvaluationTemplate      ("${GLSL_VERSION_DECL}\n"
5014                                                                                                  "${TESSELLATION_SHADER_REQUIRE}\n"
5015                                                                                                  "\n"
5016                                                                                                  + getTessellationEvaluationInLayoutString(m_primitiveType, m_spacing, m_winding, m_usePointMode) +
5017                                                                                                  "\n"
5018                                                                                                  "out highp vec4 in_f_color;\n"
5019                                                                                                  "out highp vec3 out_te_output;\n"
5020                                                                                                  "\n"
5021                                                                                                  "void main (void)\n"
5022                                                                                                  "{\n"
5023                                                                                                  + tessEvalOutputComponentStatements("gl_TessCoord.x", "out_te_output.x")
5024                                                                                                  + tessEvalOutputComponentStatements("gl_TessCoord.y", "out_te_output.y")
5025
5026                                                                                                  + (m_primitiveType == TESSPRIMITIVETYPE_TRIANGLES ?
5027                                                                                                         tessEvalOutputComponentStatements("gl_TessCoord.z", "out_te_output.z") :
5028                                                                                                         "       out_te_output.z = 0.0f;\n") +
5029                                                                                                  "      gl_Position = vec4(gl_TessCoord.xy, 0.0, 1.0);\n"
5030                                                                                                  "      in_f_color = vec4(1.0);\n"
5031                                                                                                  "}\n");
5032         std::string fragmentShaderTemplate                      ("${GLSL_VERSION_DECL}\n"
5033                                                                                                  "\n"
5034                                                                                                  "layout (location = 0) out mediump vec4 o_color;\n"
5035                                                                                                  "\n"
5036                                                                                                  "in highp vec4 in_f_color;\n"
5037                                                                                                  "\n"
5038                                                                                                  "void main (void)\n"
5039                                                                                                  "{\n"
5040                                                                                                  "      o_color = in_f_color;\n"
5041                                                                                                  "}\n");
5042
5043         m_program = SharedPtr<const ShaderProgram>(new ShaderProgram(m_context.getRenderContext(), glu::ProgramSources()
5044                 << glu::VertexSource                                    (specializeShader(m_context, vertexShaderTemplate.c_str()))
5045                 << glu::TessellationControlSource               (specializeShader(m_context, tessellationControlTemplate.c_str()))
5046                 << glu::TessellationEvaluationSource    (specializeShader(m_context, tessellationEvaluationTemplate.c_str()))
5047                 << glu::FragmentSource                                  (specializeShader(m_context, fragmentShaderTemplate.c_str()))
5048                 << glu::TransformFeedbackVarying                ("out_te_output")
5049                 << glu::TransformFeedbackMode                   (GL_INTERLEAVED_ATTRIBS)));
5050
5051         m_testCtx.getLog() << *m_program;
5052         if (!m_program->isOk())
5053                 TCU_FAIL("Program compilation failed");
5054 }
5055
5056 void TessCoordComponentInvarianceCase::deinit (void)
5057 {
5058         m_program.clear();
5059 }
5060
5061 vector<float> TessCoordComponentInvarianceCase::genTessLevelCases (int numCases)
5062 {
5063         de::Random              rnd(123);
5064         vector<float>   result;
5065
5066         for (int i = 0; i < numCases; i++)
5067                 for (int j = 0; j < 6; j++)
5068                         result.push_back(rnd.getFloat(1.0f, 63.0f));
5069
5070         return result;
5071 }
5072
5073 TessCoordComponentInvarianceCase::IterateResult TessCoordComponentInvarianceCase::iterate (void)
5074 {
5075         typedef TransformFeedbackHandler<Vec3> TFHandler;
5076
5077         TestLog&                                log                                     = m_testCtx.getLog();
5078         const RenderContext&    renderCtx                       = m_context.getRenderContext();
5079         const RandomViewport    viewport                        (renderCtx.getRenderTarget(), RENDER_SIZE, RENDER_SIZE, deStringHash(getName()));
5080         const glw::Functions&   gl                                      = renderCtx.getFunctions();
5081         const int                               numTessLevelCases       = 32;
5082         const vector<float>             tessLevels                      = genTessLevelCases(numTessLevelCases);
5083         const deUint32                  programGL                       = m_program->getProgram();
5084
5085         gl.useProgram(programGL);
5086         setViewport(gl, viewport);
5087         gl.patchParameteri(GL_PATCH_VERTICES, 6);
5088
5089         {
5090                 // Compute the number vertices in the largest draw call, so we can allocate the TF buffer just once.
5091                 int maxNumVerticesInDrawCall = 0;
5092                 for (int i = 0; i < numTessLevelCases; i++)
5093                         maxNumVerticesInDrawCall = de::max(maxNumVerticesInDrawCall, referenceVertexCount(m_primitiveType, m_spacing, m_usePointMode, &tessLevels[6*i+0], &tessLevels[6*i+2]));
5094
5095                 {
5096                         const TFHandler tfHandler(m_context.getRenderContext(), maxNumVerticesInDrawCall);
5097
5098                         for (int tessLevelCaseNdx = 0; tessLevelCaseNdx < numTessLevelCases; tessLevelCaseNdx++)
5099                         {
5100                                 log << TestLog::Message << "Testing with tessellation levels: " << tessellationLevelsString(&tessLevels[6*tessLevelCaseNdx+0], &tessLevels[6*tessLevelCaseNdx+2]) << TestLog::EndMessage;
5101
5102                                 const glu::VertexArrayBinding bindings[] = { glu::va::Float("in_v_attr", 1, (int)6, 0, &tessLevels[6*tessLevelCaseNdx]) };
5103                                 const TFHandler::Result tfResult = tfHandler.renderAndGetPrimitives(programGL, outputPrimitiveTypeGL(m_primitiveType, m_usePointMode),
5104                                                                                                                                                                         DE_LENGTH_OF_ARRAY(bindings), &bindings[0], 6);
5105
5106                                 for (int vtxNdx = 0; vtxNdx < (int)tfResult.varying.size(); vtxNdx++)
5107                                 {
5108                                         const Vec3&             vec                     = tfResult.varying[vtxNdx];
5109                                         const int               numComps        = m_primitiveType == TESSPRIMITIVETYPE_TRIANGLES ? 3 : 2;
5110
5111                                         for (int compNdx = 0; compNdx < numComps; compNdx++)
5112                                         {
5113                                                 if (!checkTessCoordComponent(vec[compNdx]))
5114                                                 {
5115                                                         log << TestLog::Message << "Note: output value at index " << vtxNdx << " is "
5116                                                                                                         << (m_primitiveType == TESSPRIMITIVETYPE_TRIANGLES ? de::toString(vec) : de::toString(vec.swizzle(0,1)))
5117                                                                                                         << TestLog::EndMessage;
5118                                                         m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "Invalid tessellation coordinate component");
5119                                                         return STOP;
5120                                                 }
5121                                         }
5122                                 }
5123                         }
5124                 }
5125         }
5126
5127         m_testCtx.setTestResult(QP_TEST_RESULT_PASS, "Pass");
5128         return STOP;
5129 }
5130
5131 /*--------------------------------------------------------------------*//*!
5132  * \brief Test first part of invariance rule #8
5133  *
5134  * Test that all (relevant) components of tess coord are in [0,1].
5135  *//*--------------------------------------------------------------------*/
5136 class TessCoordComponentRangeCase : public TessCoordComponentInvarianceCase
5137 {
5138 public:
5139         TessCoordComponentRangeCase (Context& context, const char* name, const char* description, TessPrimitiveType primType, SpacingMode spacing, Winding winding, bool usePointMode)
5140                 : TessCoordComponentInvarianceCase(context, name, description, primType, spacing, winding, usePointMode)
5141         {
5142         }
5143
5144 protected:
5145         virtual string tessEvalOutputComponentStatements (const char* tessCoordComponentName, const char* outputComponentName) const
5146         {
5147                 return string() + "\t" + outputComponentName + " = " + tessCoordComponentName + ";\n";
5148         }
5149
5150         virtual bool checkTessCoordComponent (float component) const
5151         {
5152                 if (!de::inRange(component, 0.0f, 1.0f))
5153                 {
5154                         m_testCtx.getLog() << TestLog::Message << "Failure: tess coord component isn't in range [0,1]" << TestLog::EndMessage;
5155                         return false;
5156                 }
5157                 return true;
5158         }
5159 };
5160
5161 /*--------------------------------------------------------------------*//*!
5162  * \brief Test second part of invariance rule #8
5163  *
5164  * Test that all (relevant) components of tess coord are in [0,1] and
5165  * 1.0-c is exact for every such component c.
5166  *//*--------------------------------------------------------------------*/
5167 class OneMinusTessCoordComponentCase : public TessCoordComponentInvarianceCase
5168 {
5169 public:
5170         OneMinusTessCoordComponentCase (Context& context, const char* name, const char* description, TessPrimitiveType primType, SpacingMode spacing, Winding winding, bool usePointMode)
5171                 : TessCoordComponentInvarianceCase(context, name, description, primType, spacing, winding, usePointMode)
5172         {
5173         }
5174
5175 protected:
5176         virtual string tessEvalOutputComponentStatements (const char* tessCoordComponentName, const char* outputComponentName) const
5177         {
5178                 return string() + "     {\n"
5179                                                   "             float oneMinusComp = 1.0 - " + tessCoordComponentName + ";\n"
5180                                                   "             " + outputComponentName + " = " + tessCoordComponentName + " + oneMinusComp;\n"
5181                                                   "     }\n";
5182         }
5183
5184         virtual bool checkTessCoordComponent (float component) const
5185         {
5186                 if (component != 1.0f)
5187                 {
5188                         m_testCtx.getLog() << TestLog::Message << "Failure: comp + (1.0-comp) doesn't equal 1.0 for some component of tessellation coordinate" << TestLog::EndMessage;
5189                         return false;
5190                 }
5191                 return true;
5192         }
5193 };
5194
5195 /*--------------------------------------------------------------------*//*!
5196  * \brief Test that patch is discarded if relevant outer level <= 0.0
5197  *
5198  * Draws patches with different combinations of tessellation levels,
5199  * varying which levels are negative. Verifies by checking that colored
5200  * pixels exist inside the area of valid primitives, and only black pixels
5201  * exist inside the area of discarded primitives. An additional sanity
5202  * test is done, checking that the number of primitives written by TF is
5203  * correct.
5204  *//*--------------------------------------------------------------------*/
5205 class PrimitiveDiscardCase : public TestCase
5206 {
5207 public:
5208         PrimitiveDiscardCase (Context& context, const char* name, const char* description, TessPrimitiveType primType, SpacingMode spacing, Winding winding, bool usePointMode)
5209                 : TestCase                      (context, name, description)
5210                 , m_primitiveType       (primType)
5211                 , m_spacing                     (spacing)
5212                 , m_winding                     (winding)
5213                 , m_usePointMode        (usePointMode)
5214         {
5215         }
5216
5217         void                                                                    init            (void);
5218         void                                                                    deinit          (void);
5219         IterateResult                                                   iterate         (void);
5220
5221 private:
5222         static vector<float>                                    genAttributes (void);
5223
5224         static const int                                                RENDER_SIZE = 256;
5225
5226         const TessPrimitiveType                                 m_primitiveType;
5227         const SpacingMode                                               m_spacing;
5228         const Winding                                                   m_winding;
5229         const bool                                                              m_usePointMode;
5230
5231         SharedPtr<const glu::ShaderProgram>             m_program;
5232 };
5233
5234 void PrimitiveDiscardCase::init (void)
5235 {
5236         checkTessellationSupport(m_context);
5237         checkRenderTargetSize(m_context.getRenderTarget(), RENDER_SIZE);
5238
5239         std::string vertexShaderTemplate                        ("${GLSL_VERSION_DECL}\n"
5240                                                                                                  "\n"
5241                                                                                                  "in highp float in_v_attr;\n"
5242                                                                                                  "out highp float in_tc_attr;\n"
5243                                                                                                  "\n"
5244                                                                                                  "void main (void)\n"
5245                                                                                                  "{\n"
5246                                                                                                  "      in_tc_attr = in_v_attr;\n"
5247                                                                                                  "}\n");
5248         std::string tessellationControlTemplate         ("${GLSL_VERSION_DECL}\n"
5249                                                                                                  "${TESSELLATION_SHADER_REQUIRE}\n"
5250                                                                                                  "\n"
5251                                                                                                  "layout (vertices = 1) out;\n"
5252                                                                                                  "\n"
5253                                                                                                  "in highp float in_tc_attr[];\n"
5254                                                                                                  "\n"
5255                                                                                                  "patch out highp vec2 in_te_positionScale;\n"
5256                                                                                                  "patch out highp vec2 in_te_positionOffset;\n"
5257                                                                                                  "\n"
5258                                                                                                  "void main (void)\n"
5259                                                                                                  "{\n"
5260                                                                                                  "      in_te_positionScale  = vec2(in_tc_attr[6], in_tc_attr[7]);\n"
5261                                                                                                  "      in_te_positionOffset = vec2(in_tc_attr[8], in_tc_attr[9]);\n"
5262                                                                                                  "\n"
5263                                                                                                  "      gl_TessLevelInner[0] = in_tc_attr[0];\n"
5264                                                                                                  "      gl_TessLevelInner[1] = in_tc_attr[1];\n"
5265                                                                                                  "\n"
5266                                                                                                  "      gl_TessLevelOuter[0] = in_tc_attr[2];\n"
5267                                                                                                  "      gl_TessLevelOuter[1] = in_tc_attr[3];\n"
5268                                                                                                  "      gl_TessLevelOuter[2] = in_tc_attr[4];\n"
5269                                                                                                  "      gl_TessLevelOuter[3] = in_tc_attr[5];\n"
5270                                                                                                  "}\n");
5271         std::string tessellationEvaluationTemplate      ("${GLSL_VERSION_DECL}\n"
5272                                                                                                  "${TESSELLATION_SHADER_REQUIRE}\n"
5273                                                                                                  "\n"
5274                                                                                                  + getTessellationEvaluationInLayoutString(m_primitiveType, m_spacing, m_winding, m_usePointMode) +
5275                                                                                                  "\n"
5276                                                                                                  "patch in highp vec2 in_te_positionScale;\n"
5277                                                                                                  "patch in highp vec2 in_te_positionOffset;\n"
5278                                                                                                  "\n"
5279                                                                                                  "out highp vec3 out_te_tessCoord;\n"
5280                                                                                                  "\n"
5281                                                                                                  "void main (void)\n"
5282                                                                                                  "{\n"
5283                                                                                                  "      out_te_tessCoord = gl_TessCoord;\n"
5284                                                                                                  "      gl_Position = vec4(gl_TessCoord.xy*in_te_positionScale + in_te_positionOffset, 0.0, 1.0);\n"
5285                                                                                                  "}\n");
5286         std::string fragmentShaderTemplate                      ("${GLSL_VERSION_DECL}\n"
5287                                                                                                  "\n"
5288                                                                                                  "layout (location = 0) out mediump vec4 o_color;\n"
5289                                                                                                  "\n"
5290                                                                                                  "void main (void)\n"
5291                                                                                                  "{\n"
5292                                                                                                  "      o_color = vec4(1.0);\n"
5293                                                                                                  "}\n");
5294
5295         m_program = SharedPtr<const ShaderProgram>(new ShaderProgram(m_context.getRenderContext(), glu::ProgramSources()
5296                 << glu::VertexSource                                    (specializeShader(m_context, vertexShaderTemplate.c_str()))
5297                 << glu::TessellationControlSource               (specializeShader(m_context, tessellationControlTemplate.c_str()))
5298                 << glu::TessellationEvaluationSource    (specializeShader(m_context, tessellationEvaluationTemplate.c_str()))
5299                 << glu::FragmentSource                                  (specializeShader(m_context, fragmentShaderTemplate.c_str()))
5300                 << glu::TransformFeedbackVarying                ("out_te_tessCoord")
5301                 << glu::TransformFeedbackMode                   (GL_INTERLEAVED_ATTRIBS)));
5302
5303         m_testCtx.getLog() << *m_program;
5304         if (!m_program->isOk())
5305                 TCU_FAIL("Program compilation failed");
5306 }
5307
5308 void PrimitiveDiscardCase::deinit (void)
5309 {
5310         m_program.clear();
5311 }
5312
5313 vector<float> PrimitiveDiscardCase::genAttributes (void)
5314 {
5315         // Generate input attributes (tessellation levels, and position scale and
5316         // offset) for a number of primitives. Each primitive has a different
5317         // combination of tessellatio levels; each level is either a valid
5318         // value or an "invalid" value (negative or zero, chosen from
5319         // invalidTessLevelChoices).
5320
5321         // \note The attributes are generated in such an order that all of the
5322         //               valid attribute tuples come before the first invalid one both
5323         //               in the result vector, and when scanning the resulting 2d grid
5324         //               of primitives is scanned in y-major order. This makes
5325         //               verification somewhat simpler.
5326
5327         static const float      baseTessLevels[6]                       = { 3.0f, 4.0f, 5.0f, 6.0f, 7.0f, 8.0f };
5328         static const float      invalidTessLevelChoices[]       = { -0.42f, 0.0f };
5329         const int                       numChoices                                      = 1 + DE_LENGTH_OF_ARRAY(invalidTessLevelChoices);
5330         float                           choices[6][numChoices];
5331         vector<float>           result;
5332
5333         for (int levelNdx = 0; levelNdx < 6; levelNdx++)
5334                 for (int choiceNdx = 0; choiceNdx < numChoices; choiceNdx++)
5335                         choices[levelNdx][choiceNdx] = choiceNdx == 0 ? baseTessLevels[levelNdx] : invalidTessLevelChoices[choiceNdx-1];
5336
5337         {
5338                 const int       numCols                 = intPow(numChoices, 6/2); // sqrt(numChoices**6) == sqrt(number of primitives)
5339                 const int       numRows                 = numCols;
5340                 int                     index                   = 0;
5341                 int                     i[6];
5342                 // We could do this with some generic combination-generation function, but meh, it's not that bad.
5343                 for (i[2] = 0; i[2] < numChoices; i[2]++) // First  outer
5344                 for (i[3] = 0; i[3] < numChoices; i[3]++) // Second outer
5345                 for (i[4] = 0; i[4] < numChoices; i[4]++) // Third  outer
5346                 for (i[5] = 0; i[5] < numChoices; i[5]++) // Fourth outer
5347                 for (i[0] = 0; i[0] < numChoices; i[0]++) // First  inner
5348                 for (i[1] = 0; i[1] < numChoices; i[1]++) // Second inner
5349                 {
5350                         for (int j = 0; j < 6; j++)
5351                                 result.push_back(choices[j][i[j]]);
5352
5353                         {
5354                                 const int col = index % numCols;
5355                                 const int row = index / numCols;
5356                                 // Position scale.
5357                                 result.push_back((float)2.0f / (float)numCols);
5358                                 result.push_back((float)2.0f / (float)numRows);
5359                                 // Position offset.
5360                                 result.push_back((float)col / (float)numCols * 2.0f - 1.0f);
5361                                 result.push_back((float)row / (float)numRows * 2.0f - 1.0f);
5362                         }
5363
5364                         index++;
5365                 }
5366         }
5367
5368         return result;
5369 }
5370
5371 PrimitiveDiscardCase::IterateResult PrimitiveDiscardCase::iterate (void)
5372 {
5373         typedef TransformFeedbackHandler<Vec3> TFHandler;
5374
5375         TestLog&                                log                                             = m_testCtx.getLog();
5376         const RenderContext&    renderCtx                               = m_context.getRenderContext();
5377         const RandomViewport    viewport                                (renderCtx.getRenderTarget(), RENDER_SIZE, RENDER_SIZE, deStringHash(getName()));
5378         const glw::Functions&   gl                                              = renderCtx.getFunctions();
5379         const vector<float>             attributes                              = genAttributes();
5380         const int                               numAttribsPerPrimitive  = 6+2+2; // Tess levels, scale, offset.
5381         const int                               numPrimitives                   = (int)attributes.size() / numAttribsPerPrimitive;
5382         const deUint32                  programGL                               = m_program->getProgram();
5383
5384         gl.useProgram(programGL);
5385         setViewport(gl, viewport);
5386         gl.patchParameteri(GL_PATCH_VERTICES, numAttribsPerPrimitive);
5387
5388         gl.clearColor(0.0f, 0.0f, 0.0f, 1.0f);
5389         gl.clear(GL_COLOR_BUFFER_BIT);
5390
5391         // Check the convenience assertion that all discarded patches come after the last non-discarded patch.
5392         {
5393                 bool discardedPatchEncountered = false;
5394                 for (int patchNdx = 0; patchNdx < numPrimitives; patchNdx++)
5395                 {
5396                         const bool discard = isPatchDiscarded(m_primitiveType, &attributes[numAttribsPerPrimitive*patchNdx + 2]);
5397                         DE_ASSERT(discard || !discardedPatchEncountered);
5398                         discardedPatchEncountered = discard;
5399                 }
5400                 DE_UNREF(discardedPatchEncountered);
5401         }
5402
5403         {
5404                 int numVerticesInDrawCall = 0;
5405                 for (int patchNdx = 0; patchNdx < numPrimitives; patchNdx++)
5406                         numVerticesInDrawCall += referenceVertexCount(m_primitiveType, m_spacing, m_usePointMode, &attributes[numAttribsPerPrimitive*patchNdx+0], &attributes[numAttribsPerPrimitive*patchNdx+2]);
5407
5408                 log << TestLog::Message << "Note: rendering " << numPrimitives << " patches; first patches have valid relevant outer levels, "
5409                                                                 << "but later patches have one or more invalid (i.e. less than or equal to 0.0) relevant outer levels" << TestLog::EndMessage;
5410
5411                 {
5412                         const TFHandler                                 tfHandler       (m_context.getRenderContext(), numVerticesInDrawCall);
5413                         const glu::VertexArrayBinding   bindings[]      = { glu::va::Float("in_v_attr", 1, (int)attributes.size(), 0, &attributes[0]) };
5414                         const TFHandler::Result                 tfResult        = tfHandler.renderAndGetPrimitives(programGL, outputPrimitiveTypeGL(m_primitiveType, m_usePointMode),
5415                                                                                                                                                                                    DE_LENGTH_OF_ARRAY(bindings), &bindings[0], (int)attributes.size());
5416                         const tcu::Surface                              pixels          = getPixels(renderCtx, viewport);
5417
5418                         log << TestLog::Image("RenderedImage", "Rendered image", pixels);
5419
5420                         if ((int)tfResult.varying.size() != numVerticesInDrawCall)
5421                         {
5422                                 log << TestLog::Message << "Failure: expected " << numVerticesInDrawCall << " vertices from transform feedback, got " << tfResult.varying.size() << TestLog::EndMessage;
5423                                 m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "Wrong number of tessellation coordinates");
5424                                 return STOP;
5425                         }
5426
5427                         // Check that white pixels are found around every non-discarded
5428                         // patch, and that only black pixels are found after the last
5429                         // non-discarded patch.
5430                         {
5431                                 int lastWhitePixelRow                                                                   = 0;
5432                                 int secondToLastWhitePixelRow                                                   = 0;
5433                                 int     lastWhitePixelColumnOnSecondToLastWhitePixelRow         = 0;
5434
5435                                 for (int patchNdx = 0; patchNdx < numPrimitives; patchNdx++)
5436                                 {
5437                                         const float* const      attr                    = &attributes[numAttribsPerPrimitive*patchNdx];
5438                                         const bool                      validLevels             = !isPatchDiscarded(m_primitiveType, &attr[2]);
5439
5440                                         if (validLevels)
5441                                         {
5442                                                 // Not a discarded patch; check that at least one white pixel is found in its area.
5443
5444                                                 const float* const      scale           = &attr[6];
5445                                                 const float* const      offset          = &attr[8];
5446                                                 const int                       x0                      = (int)((                       offset[0] + 1.0f)*0.5f*(float)pixels.getWidth()) - 1;
5447                                                 const int                       x1                      = (int)((scale[0] + offset[0] + 1.0f)*0.5f*(float)pixels.getWidth()) + 1;
5448                                                 const int                       y0                      = (int)((                       offset[1] + 1.0f)*0.5f*(float)pixels.getHeight()) - 1;
5449                                                 const int                       y1                      = (int)((scale[1] + offset[1] + 1.0f)*0.5f*(float)pixels.getHeight()) + 1;
5450                                                 const bool                      isMSAA          = renderCtx.getRenderTarget().getNumSamples() > 1;
5451                                                 bool                            pixelOk         = false;
5452
5453                                                 if (y1 > lastWhitePixelRow)
5454                                                 {
5455                                                         secondToLastWhitePixelRow       = lastWhitePixelRow;
5456                                                         lastWhitePixelRow                       = y1;
5457                                                 }
5458                                                 lastWhitePixelColumnOnSecondToLastWhitePixelRow = x1;
5459
5460                                                 for (int y = y0; y <= y1 && !pixelOk; y++)
5461                                                 for (int x = x0; x <= x1 && !pixelOk; x++)
5462                                                 {
5463                                                         if (!de::inBounds(x, 0, pixels.getWidth()) || !de::inBounds(y, 0, pixels.getHeight()))
5464                                                                 continue;
5465
5466                                                         if (isMSAA)
5467                                                         {
5468                                                                 if (pixels.getPixel(x, y) != tcu::RGBA::black())
5469                                                                         pixelOk = true;
5470                                                         }
5471                                                         else
5472                                                         {
5473                                                                 if (pixels.getPixel(x, y) == tcu::RGBA::white())
5474                                                                         pixelOk = true;
5475                                                         }
5476                                                 }
5477
5478                                                 if (!pixelOk)
5479                                                 {
5480                                                         log << TestLog::Message << "Failure: expected at least one " << (isMSAA ? "non-black" : "white") << " pixel in the rectangle "
5481                                                                                                         << "[x0=" << x0 << ", y0=" << y0 << ", x1=" << x1 << ", y1=" << y1 << "]" << TestLog::EndMessage
5482                                                                 << TestLog::Message << "Note: the rectangle approximately corresponds to the patch with these tessellation levels: "
5483                                                                                                         << tessellationLevelsString(&attr[0], &attr[1]) << TestLog::EndMessage;
5484                                                         m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "Image verification failed");
5485                                                         return STOP;
5486                                                 }
5487                                         }
5488                                         else
5489                                         {
5490                                                 // First discarded primitive patch; the remaining are guaranteed to be discarded ones as well.
5491
5492                                                 for (int y = 0; y < pixels.getHeight(); y++)
5493                                                 for (int x = 0; x < pixels.getWidth(); x++)
5494                                                 {
5495                                                         if (y > lastWhitePixelRow || (y > secondToLastWhitePixelRow && x > lastWhitePixelColumnOnSecondToLastWhitePixelRow))
5496                                                         {
5497                                                                 if (pixels.getPixel(x, y) != tcu::RGBA::black())
5498                                                                 {
5499                                                                         log << TestLog::Message << "Failure: expected all pixels to be black in the area "
5500                                                                                                                         << (lastWhitePixelColumnOnSecondToLastWhitePixelRow < pixels.getWidth()-1
5501                                                                                                                                         ? string() + "y > " + de::toString(lastWhitePixelRow) + " || (y > " + de::toString(secondToLastWhitePixelRow)
5502                                                                                                                                                            + " && x > " + de::toString(lastWhitePixelColumnOnSecondToLastWhitePixelRow) + ")"
5503                                                                                                                                         : string() + "y > " + de::toString(lastWhitePixelRow))
5504                                                                                                                         << " (they all correspond to patches that should be discarded)" << TestLog::EndMessage
5505                                                                                 << TestLog::Message << "Note: pixel " << tcu::IVec2(x, y) << " isn't black" << TestLog::EndMessage;
5506                                                                         m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "Image verification failed");
5507                                                                         return STOP;
5508                                                                 }
5509                                                         }
5510                                                 }
5511
5512                                                 break;
5513                                         }
5514                                 }
5515                         }
5516                 }
5517         }
5518
5519         m_testCtx.setTestResult(QP_TEST_RESULT_PASS, "Pass");
5520         return STOP;
5521 }
5522
5523 /*--------------------------------------------------------------------*//*!
5524  * \brief Case testing user-defined IO between TCS and TES
5525  *
5526  * TCS outputs various values to TES, including aggregates. The outputs
5527  * can be per-patch or per-vertex, and if per-vertex, they can also be in
5528  * an IO block. Per-vertex input array size can be left implicit (i.e.
5529  * inputArray[]) or explicit either by gl_MaxPatchVertices or an integer
5530  * literal whose value is queried from GL.
5531  *
5532  * The values output are generated in TCS and verified in TES against
5533  * similarly generated values. In case a verification of a value fails, the
5534  * index of the invalid value is output with TF.
5535  * As a sanity check, also the rendering result is verified (against pre-
5536  * rendered reference).
5537  *//*--------------------------------------------------------------------*/
5538 class UserDefinedIOCase : public TestCase
5539 {
5540 public:
5541         enum IOType
5542         {
5543                 IO_TYPE_PER_PATCH = 0,
5544                 IO_TYPE_PER_PATCH_ARRAY,
5545                 IO_TYPE_PER_PATCH_BLOCK,
5546                 IO_TYPE_PER_PATCH_BLOCK_ARRAY,
5547                 IO_TYPE_PER_VERTEX,
5548                 IO_TYPE_PER_VERTEX_BLOCK,
5549
5550                 IO_TYPE_LAST
5551         };
5552
5553         enum VertexIOArraySize
5554         {
5555                 VERTEX_IO_ARRAY_SIZE_IMPLICIT = 0,
5556                 VERTEX_IO_ARRAY_SIZE_EXPLICIT_SHADER_BUILTIN,           //!< Use gl_MaxPatchVertices as size for per-vertex input array.
5557                 VERTEX_IO_ARRAY_SIZE_EXPLICIT_QUERY,                            //!< Query GL_MAX_PATCH_VERTICES, and use that as size for per-vertex input array.
5558
5559                 VERTEX_IO_ARRAY_SIZE_LAST
5560         };
5561
5562         enum TessControlOutArraySize
5563         {
5564                 TESS_CONTROL_OUT_ARRAY_SIZE_IMPLICIT = 0,
5565                 TESS_CONTROL_OUT_ARRAY_SIZE_LAYOUT,
5566                 TESS_CONTROL_OUT_ARRAY_SIZE_QUERY,
5567                 TESS_CONTROL_OUT_ARRAY_SIZE_SHADER_BUILTIN
5568         };
5569
5570         UserDefinedIOCase (Context& context, const char* name, const char* description, TessPrimitiveType primType, IOType ioType, VertexIOArraySize vertexIOArraySize, TessControlOutArraySize tessControlOutArraySize, const char* referenceImagePath)
5571                 : TestCase                                      (context, name, description)
5572                 , m_primitiveType                       (primType)
5573                 , m_ioType                                      (ioType)
5574                 , m_vertexIOArraySize           (vertexIOArraySize)
5575                 , m_tessControlOutArraySize     (tessControlOutArraySize)
5576                 , m_referenceImagePath          (referenceImagePath)
5577         {
5578         }
5579
5580         void                                                                    init            (void);
5581         void                                                                    deinit          (void);
5582         IterateResult                                                   iterate         (void);
5583
5584 private:
5585         typedef string (*BasicTypeVisitFunc)(const string& name, glu::DataType type, int indentationDepth); //!< See glslTraverseBasicTypes below.
5586
5587         class TopLevelObject
5588         {
5589         public:
5590                 virtual                 ~TopLevelObject                                 (void) {}
5591
5592                 virtual string  name                                                    (void) const = 0;
5593                 virtual string  declare                                                 (void) const = 0;
5594                 virtual string  declareArray                                    (const string& arraySizeExpr) const = 0;
5595                 virtual string  glslTraverseBasicTypeArray              (int numArrayElements, //!< If negative, traverse just array[gl_InvocationID], not all indices.
5596                                                                                                                  int indentationDepth,
5597                                                                                                                  BasicTypeVisitFunc) const = 0;
5598                 virtual string  glslTraverseBasicType                   (int indentationDepth,
5599                                                                                                                  BasicTypeVisitFunc) const = 0;
5600                 virtual int             numBasicSubobjectsInElementType (void) const = 0;
5601                 virtual string  basicSubobjectAtIndex                   (int index, int arraySize) const = 0;
5602         };
5603
5604         class Variable : public TopLevelObject
5605         {
5606         public:
5607                 Variable (const string& name_, const glu::VarType& type, bool isArray)
5608                         : m_name                (name_)
5609                         , m_type                (type)
5610                         , m_isArray             (isArray)
5611                 {
5612                         DE_ASSERT(!type.isArrayType());
5613                 }
5614
5615                 string  name                                                            (void) const { return m_name; }
5616                 string  declare                                                         (void) const;
5617                 string  declareArray                                            (const string& arraySizeExpr) const;
5618                 string  glslTraverseBasicTypeArray                      (int numArrayElements, int indentationDepth, BasicTypeVisitFunc) const;
5619                 string  glslTraverseBasicType                           (int indentationDepth, BasicTypeVisitFunc) const;
5620                 int             numBasicSubobjectsInElementType         (void) const;
5621                 string  basicSubobjectAtIndex                           (int index, int arraySize) const;
5622
5623         private:
5624                 string                  m_name;
5625                 glu::VarType    m_type; //!< If this Variable is an array element, m_type is the element type; otherwise just the variable type.
5626                 const bool              m_isArray;
5627         };
5628
5629         class IOBlock : public TopLevelObject
5630         {
5631         public:
5632                 struct Member
5633                 {
5634                         string                  name;
5635                         glu::VarType    type;
5636                         Member (const string& n, const glu::VarType& t) : name(n), type(t) {}
5637                 };
5638
5639                 IOBlock (const string& blockName, const string& interfaceName, const vector<Member>& members)
5640                         : m_blockName           (blockName)
5641                         , m_interfaceName       (interfaceName)
5642                         , m_members                     (members)
5643                 {
5644                 }
5645
5646                 string  name                                                            (void) const { return m_interfaceName; }
5647                 string  declare                                                         (void) const;
5648                 string  declareArray                                            (const string& arraySizeExpr) const;
5649                 string  glslTraverseBasicTypeArray                      (int numArrayElements, int indentationDepth, BasicTypeVisitFunc) const;
5650                 string  glslTraverseBasicType                           (int indentationDepth, BasicTypeVisitFunc) const;
5651                 int             numBasicSubobjectsInElementType         (void) const;
5652                 string  basicSubobjectAtIndex                           (int index, int arraySize) const;
5653
5654         private:
5655                 string                  m_blockName;
5656                 string                  m_interfaceName;
5657                 vector<Member>  m_members;
5658         };
5659
5660         static string                                                   glslTraverseBasicTypes                          (const string&                  rootName,
5661                                                                                                                                                                  const glu::VarType&    rootType,
5662                                                                                                                                                                  int                                    arrayNestingDepth,
5663                                                                                                                                                                  int                                    indentationDepth,
5664                                                                                                                                                                  BasicTypeVisitFunc             visit);
5665
5666         static string                                                   glslAssignBasicTypeObject                       (const string& name, glu::DataType, int indentationDepth);
5667         static string                                                   glslCheckBasicTypeObject                        (const string& name, glu::DataType, int indentationDepth);
5668         static int                                                              numBasicSubobjectsInElementType         (const vector<SharedPtr<TopLevelObject> >&);
5669         static string                                                   basicSubobjectAtIndex                           (int index, const vector<SharedPtr<TopLevelObject> >&, int topLevelArraySizes);
5670
5671         enum
5672         {
5673                 RENDER_SIZE = 256
5674         };
5675         enum
5676         {
5677                 NUM_OUTPUT_VERTICES = 5
5678         };
5679         enum
5680         {
5681                 NUM_PER_PATCH_ARRAY_ELEMS = 3
5682         };
5683         enum
5684         {
5685                 NUM_PER_PATCH_BLOCKS = 2
5686         };
5687
5688         const TessPrimitiveType                                 m_primitiveType;
5689         const IOType                                                    m_ioType;
5690         const VertexIOArraySize                                 m_vertexIOArraySize;
5691         const TessControlOutArraySize                   m_tessControlOutArraySize;
5692         const string                                                    m_referenceImagePath;
5693
5694         vector<glu::StructType>                                 m_structTypes;
5695         vector<SharedPtr<TopLevelObject> >              m_tcsOutputs;
5696         vector<SharedPtr<TopLevelObject> >              m_tesInputs;
5697
5698         SharedPtr<const glu::ShaderProgram>             m_program;
5699 };
5700
5701 /*--------------------------------------------------------------------*//*!
5702  * \brief Generate GLSL code to traverse (possibly aggregate) object
5703  *
5704  * Generates a string that represents GLSL code that traverses the
5705  * basic-type subobjects in a rootType-typed object named rootName. Arrays
5706  * are traversed with loops and struct members are each traversed
5707  * separately. The code for each basic-type subobject is generated with
5708  * the function given as the 'visit' argument.
5709  *//*--------------------------------------------------------------------*/
5710 string UserDefinedIOCase::glslTraverseBasicTypes (const string&                 rootName,
5711                                                                                                   const glu::VarType&   rootType,
5712                                                                                                   int                                   arrayNestingDepth,
5713                                                                                                   int                                   indentationDepth,
5714                                                                                                   BasicTypeVisitFunc    visit)
5715 {
5716         if (rootType.isBasicType())
5717                 return visit(rootName, rootType.getBasicType(), indentationDepth);
5718         else if (rootType.isArrayType())
5719         {
5720                 const string indentation        = string(indentationDepth, '\t');
5721                 const string loopIndexName      = "i" + de::toString(arrayNestingDepth);
5722                 const string arrayLength        = de::toString(rootType.getArraySize());
5723                 return indentation + "for (int " + loopIndexName + " = 0; " + loopIndexName + " < " + de::toString(rootType.getArraySize()) + "; " + loopIndexName + "++)\n" +
5724                            indentation + "{\n" +
5725                            glslTraverseBasicTypes(rootName + "[" + loopIndexName + "]", rootType.getElementType(), arrayNestingDepth+1, indentationDepth+1, visit) +
5726                            indentation + "}\n";
5727         }
5728         else if (rootType.isStructType())
5729         {
5730                 const glu::StructType&  structType = *rootType.getStructPtr();
5731                 const int                               numMembers = structType.getNumMembers();
5732                 string                                  result;
5733
5734                 for (int membNdx = 0; membNdx < numMembers; membNdx++)
5735                 {
5736                         const glu::StructMember& member = structType.getMember(membNdx);
5737                         result += glslTraverseBasicTypes(rootName + "." + member.getName(), member.getType(), arrayNestingDepth, indentationDepth, visit);
5738                 }
5739
5740                 return result;
5741         }
5742         else
5743         {
5744                 DE_ASSERT(false);
5745                 return DE_NULL;
5746         }
5747 }
5748
5749 string UserDefinedIOCase::Variable::declare (void) const
5750 {
5751         DE_ASSERT(!m_isArray);
5752         return de::toString(glu::declare(m_type, m_name)) + ";\n";
5753 }
5754
5755 string UserDefinedIOCase::Variable::declareArray (const string& sizeExpr) const
5756 {
5757         DE_ASSERT(m_isArray);
5758         return de::toString(glu::declare(m_type, m_name)) + "[" + sizeExpr + "];\n";
5759 }
5760
5761 string UserDefinedIOCase::IOBlock::declare (void) const
5762 {
5763         std::ostringstream buf;
5764
5765         buf << m_blockName << "\n"
5766                 << "{\n";
5767
5768         for (int i = 0; i < (int)m_members.size(); i++)
5769                 buf << "\t" << glu::declare(m_members[i].type, m_members[i].name) << ";\n";
5770
5771         buf << "} " << m_interfaceName << ";\n";
5772         return buf.str();
5773 }
5774
5775 string UserDefinedIOCase::IOBlock::declareArray (const string& sizeExpr) const
5776 {
5777         std::ostringstream buf;
5778
5779         buf << m_blockName << "\n"
5780                 << "{\n";
5781
5782         for (int i = 0; i < (int)m_members.size(); i++)
5783                 buf << "\t" << glu::declare(m_members[i].type, m_members[i].name) << ";\n";
5784
5785         buf << "} " << m_interfaceName << "[" << sizeExpr << "];\n";
5786         return buf.str();
5787 }
5788
5789 string UserDefinedIOCase::Variable::glslTraverseBasicTypeArray (int numArrayElements, int indentationDepth, BasicTypeVisitFunc visit) const
5790 {
5791         DE_ASSERT(m_isArray);
5792
5793         const bool                              traverseAsArray         = numArrayElements >= 0;
5794         const string                    traversedName           = m_name + (!traverseAsArray ? "[gl_InvocationID]" : "");
5795         const glu::VarType              type                            = traverseAsArray ? glu::VarType(m_type, numArrayElements) : m_type;
5796
5797         return UserDefinedIOCase::glslTraverseBasicTypes(traversedName, type, 0, indentationDepth, visit);
5798 }
5799
5800 string UserDefinedIOCase::Variable::glslTraverseBasicType (int indentationDepth, BasicTypeVisitFunc visit) const
5801 {
5802         DE_ASSERT(!m_isArray);
5803
5804         return UserDefinedIOCase::glslTraverseBasicTypes(m_name, m_type, 0, indentationDepth, visit);
5805 }
5806
5807 string UserDefinedIOCase::IOBlock::glslTraverseBasicTypeArray (int numArrayElements, int indentationDepth, BasicTypeVisitFunc visit) const
5808 {
5809         if (numArrayElements >= 0)
5810         {
5811                 const string    indentation                     = string(indentationDepth, '\t');
5812                 string                  result                          = indentation + "for (int i0 = 0; i0 < " + de::toString(numArrayElements) + "; i0++)\n" +
5813                                                                                           indentation + "{\n";
5814                 for (int i = 0; i < (int)m_members.size(); i++)
5815                         result += UserDefinedIOCase::glslTraverseBasicTypes(m_interfaceName + "[i0]." + m_members[i].name, m_members[i].type, 1, indentationDepth+1, visit);
5816                 result += indentation + "}\n";
5817                 return result;
5818         }
5819         else
5820         {
5821                 string result;
5822                 for (int i = 0; i < (int)m_members.size(); i++)
5823                         result += UserDefinedIOCase::glslTraverseBasicTypes(m_interfaceName + "[gl_InvocationID]." + m_members[i].name, m_members[i].type, 0, indentationDepth, visit);
5824                 return result;
5825         }
5826 }
5827
5828
5829 string UserDefinedIOCase::IOBlock::glslTraverseBasicType (int indentationDepth, BasicTypeVisitFunc visit) const
5830 {
5831         string result;
5832         for (int i = 0; i < (int)m_members.size(); i++)
5833                 result += UserDefinedIOCase::glslTraverseBasicTypes(m_interfaceName + "." + m_members[i].name, m_members[i].type, 0, indentationDepth, visit);
5834         return result;
5835 }
5836
5837 int UserDefinedIOCase::Variable::numBasicSubobjectsInElementType (void) const
5838 {
5839         return numBasicSubobjects(m_type);
5840 }
5841
5842 int UserDefinedIOCase::IOBlock::numBasicSubobjectsInElementType (void) const
5843 {
5844         int result = 0;
5845         for (int i = 0; i < (int)m_members.size(); i++)
5846                 result += numBasicSubobjects(m_members[i].type);
5847         return result;
5848 }
5849
5850 string UserDefinedIOCase::Variable::basicSubobjectAtIndex (int subobjectIndex, int arraySize) const
5851 {
5852         const glu::VarType      type                    = m_isArray ? glu::VarType(m_type, arraySize) : m_type;
5853         int                                     currentIndex    = 0;
5854
5855         for (glu::BasicTypeIterator basicIt = glu::BasicTypeIterator::begin(&type);
5856                  basicIt != glu::BasicTypeIterator::end(&type);
5857                  ++basicIt)
5858         {
5859                 if (currentIndex == subobjectIndex)
5860                         return m_name + de::toString(glu::TypeAccessFormat(type, basicIt.getPath()));
5861                 currentIndex++;
5862         }
5863         DE_ASSERT(false);
5864         return DE_NULL;
5865 }
5866
5867 string UserDefinedIOCase::IOBlock::basicSubobjectAtIndex (int subobjectIndex, int arraySize) const
5868 {
5869         int currentIndex = 0;
5870         for (int arrayNdx = 0; arrayNdx < arraySize; arrayNdx++)
5871         {
5872                 for (int memberNdx = 0; memberNdx < (int)m_members.size(); memberNdx++)
5873                 {
5874                         const glu::VarType& membType = m_members[memberNdx].type;
5875                         for (glu::BasicTypeIterator basicIt = glu::BasicTypeIterator::begin(&membType);
5876                                  basicIt != glu::BasicTypeIterator::end(&membType);
5877                                  ++basicIt)
5878                         {
5879                                 if (currentIndex == subobjectIndex)
5880                                         return m_interfaceName + "[" + de::toString(arrayNdx) + "]." + m_members[memberNdx].name + de::toString(glu::TypeAccessFormat(membType, basicIt.getPath()));
5881                                 currentIndex++;
5882                         }
5883                 }
5884         }
5885         DE_ASSERT(false);
5886         return DE_NULL;
5887 }
5888
5889 // Used as the 'visit' argument for glslTraverseBasicTypes.
5890 string UserDefinedIOCase::glslAssignBasicTypeObject (const string& name, glu::DataType type, int indentationDepth)
5891 {
5892         const int               scalarSize              = glu::getDataTypeScalarSize(type);
5893         const string    indentation             = string(indentationDepth, '\t');
5894         string                  result;
5895
5896         result += indentation + name + " = ";
5897
5898         if (type != glu::TYPE_FLOAT)
5899                 result += string() + glu::getDataTypeName(type) + "(";
5900         for (int i = 0; i < scalarSize; i++)
5901                 result += (i > 0 ? ", v+" + de::floatToString(0.8f*(float)i, 1)
5902                                                  : "v");
5903         if (type != glu::TYPE_FLOAT)
5904                 result += ")";
5905         result += ";\n" +
5906                           indentation + "v += 0.4;\n";
5907         return result;
5908 }
5909
5910 // Used as the 'visit' argument for glslTraverseBasicTypes.
5911 string UserDefinedIOCase::glslCheckBasicTypeObject (const string& name, glu::DataType type, int indentationDepth)
5912 {
5913         const int               scalarSize              = glu::getDataTypeScalarSize(type);
5914         const string    indentation             = string(indentationDepth, '\t');
5915         string                  result;
5916
5917         result += indentation + "allOk = allOk && compare_" + glu::getDataTypeName(type) + "(" + name + ", ";
5918
5919         if (type != glu::TYPE_FLOAT)
5920                 result += string() + glu::getDataTypeName(type) + "(";
5921         for (int i = 0; i < scalarSize; i++)
5922                 result += (i > 0 ? ", v+" + de::floatToString(0.8f*(float)i, 1)
5923                                                  : "v");
5924         if (type != glu::TYPE_FLOAT)
5925                 result += ")";
5926         result += ");\n" +
5927                           indentation + "v += 0.4;\n" +
5928                           indentation + "if (allOk) firstFailedInputIndex++;\n";
5929
5930         return result;
5931 }
5932
5933 int UserDefinedIOCase::numBasicSubobjectsInElementType (const vector<SharedPtr<TopLevelObject> >& objects)
5934 {
5935         int result = 0;
5936         for (int i = 0; i < (int)objects.size(); i++)
5937                 result += objects[i]->numBasicSubobjectsInElementType();
5938         return result;
5939 }
5940
5941 string UserDefinedIOCase::basicSubobjectAtIndex (int subobjectIndex, const vector<SharedPtr<TopLevelObject> >& objects, int topLevelArraySize)
5942 {
5943         int currentIndex        = 0;
5944         int objectIndex         = 0;
5945         for (; currentIndex < subobjectIndex; objectIndex++)
5946                 currentIndex += objects[objectIndex]->numBasicSubobjectsInElementType() * topLevelArraySize;
5947         if (currentIndex > subobjectIndex)
5948         {
5949                 objectIndex--;
5950                 currentIndex -= objects[objectIndex]->numBasicSubobjectsInElementType() * topLevelArraySize;
5951         }
5952
5953         return objects[objectIndex]->basicSubobjectAtIndex(subobjectIndex - currentIndex, topLevelArraySize);
5954 }
5955
5956 void UserDefinedIOCase::init (void)
5957 {
5958         checkTessellationSupport(m_context);
5959         checkRenderTargetSize(m_context.getRenderTarget(), RENDER_SIZE);
5960
5961         const bool                      isPerPatchIO                            = m_ioType == IO_TYPE_PER_PATCH                         ||
5962                                                                                                           m_ioType == IO_TYPE_PER_PATCH_ARRAY           ||
5963                                                                                                           m_ioType == IO_TYPE_PER_PATCH_BLOCK           ||
5964                                                                                                           m_ioType == IO_TYPE_PER_PATCH_BLOCK_ARRAY;
5965
5966         const bool                      isExplicitVertexArraySize       = m_vertexIOArraySize == VERTEX_IO_ARRAY_SIZE_EXPLICIT_SHADER_BUILTIN ||
5967                                                                                                           m_vertexIOArraySize == VERTEX_IO_ARRAY_SIZE_EXPLICIT_QUERY;
5968
5969         const string            vertexAttrArrayInputSize        = m_vertexIOArraySize == VERTEX_IO_ARRAY_SIZE_IMPLICIT                                  ? ""
5970                                                                                                         : m_vertexIOArraySize == VERTEX_IO_ARRAY_SIZE_EXPLICIT_SHADER_BUILTIN   ? "gl_MaxPatchVertices"
5971                                                                                                         : m_vertexIOArraySize == VERTEX_IO_ARRAY_SIZE_EXPLICIT_QUERY                    ? de::toString(m_context.getContextInfo().getInt(GL_MAX_PATCH_VERTICES))
5972                                                                                                         : DE_NULL;
5973
5974         const char* const       maybePatch                                      = isPerPatchIO ? "patch " : "";
5975         const string            outMaybePatch                           = string() + maybePatch + "out ";
5976         const string            inMaybePatch                            = string() + maybePatch + "in ";
5977         const bool                      useBlock                                        = m_ioType == IO_TYPE_PER_VERTEX_BLOCK          ||
5978                                                                                                           m_ioType == IO_TYPE_PER_PATCH_BLOCK           ||
5979                                                                                                           m_ioType == IO_TYPE_PER_PATCH_BLOCK_ARRAY;
5980
5981         string                          tcsDeclarations;
5982         string                          tcsStatements;
5983
5984         string                          tesDeclarations;
5985         string                          tesStatements;
5986
5987         {
5988                 m_structTypes.push_back(glu::StructType("S"));
5989
5990                 const glu::VarType      highpFloat              (glu::TYPE_FLOAT, glu::PRECISION_HIGHP);
5991                 glu::StructType&        structType              = m_structTypes.back();
5992                 const glu::VarType      structVarType   (&structType);
5993                 bool                            usedStruct              = false;
5994
5995                 structType.addMember("x", glu::VarType(glu::TYPE_INT, glu::PRECISION_HIGHP));
5996                 structType.addMember("y", glu::VarType(glu::TYPE_FLOAT_VEC4, glu::PRECISION_HIGHP));
5997
5998                 if (useBlock)
5999                 {
6000                         // It is illegal to have a structure containing an array as an output variable
6001                         structType.addMember("z", glu::VarType(highpFloat, 2));
6002                 }
6003
6004                 if (useBlock)
6005                 {
6006                         const bool                              useLightweightBlock = (m_ioType == IO_TYPE_PER_PATCH_BLOCK_ARRAY); // use leaner block to make sure it is not larger than allowed (per-patch storage is very limited)
6007                         vector<IOBlock::Member> blockMembers;
6008
6009                         if (!useLightweightBlock)
6010                                 blockMembers.push_back(IOBlock::Member("blockS",        structVarType));
6011
6012                         blockMembers.push_back(IOBlock::Member("blockFa",       glu::VarType(highpFloat, 3)));
6013                         blockMembers.push_back(IOBlock::Member("blockSa",       glu::VarType(structVarType, 2)));
6014                         blockMembers.push_back(IOBlock::Member("blockF",        highpFloat));
6015
6016                         m_tcsOutputs.push_back  (SharedPtr<TopLevelObject>(new IOBlock("TheBlock", "tcBlock", blockMembers)));
6017                         m_tesInputs.push_back   (SharedPtr<TopLevelObject>(new IOBlock("TheBlock", "teBlock", blockMembers)));
6018
6019                         usedStruct = true;
6020                 }
6021                 else
6022                 {
6023                         const Variable var0("in_te_s", structVarType,   m_ioType != IO_TYPE_PER_PATCH);
6024                         const Variable var1("in_te_f", highpFloat,              m_ioType != IO_TYPE_PER_PATCH);
6025
6026                         if (m_ioType != IO_TYPE_PER_PATCH_ARRAY)
6027                         {
6028                                 // Arrays of structures are disallowed, add struct cases only if not arrayed variable
6029                                 m_tcsOutputs.push_back  (SharedPtr<TopLevelObject>(new Variable(var0)));
6030                                 m_tesInputs.push_back   (SharedPtr<TopLevelObject>(new Variable(var0)));
6031
6032                                 usedStruct = true;
6033                         }
6034
6035                         m_tcsOutputs.push_back  (SharedPtr<TopLevelObject>(new Variable(var1)));
6036                         m_tesInputs.push_back   (SharedPtr<TopLevelObject>(new Variable(var1)));
6037                 }
6038
6039                 tcsDeclarations += "in " + Variable("in_tc_attr", highpFloat, true).declareArray(vertexAttrArrayInputSize);
6040
6041                 if (usedStruct)
6042                         tcsDeclarations += de::toString(glu::declare(structType)) + ";\n";
6043
6044                 tcsStatements += "\t{\n"
6045                                                  "\t\thighp float v = 1.3;\n";
6046
6047                 for (int tcsOutputNdx = 0; tcsOutputNdx < (int)m_tcsOutputs.size(); tcsOutputNdx++)
6048                 {
6049                         const TopLevelObject&   output          = *m_tcsOutputs[tcsOutputNdx];
6050                         const int                               numElements     = !isPerPatchIO                                                         ? -1    //!< \note -1 means indexing with gl_InstanceID
6051                                                                                                 : m_ioType == IO_TYPE_PER_PATCH                         ? 1
6052                                                                                                 : m_ioType == IO_TYPE_PER_PATCH_ARRAY           ? NUM_PER_PATCH_ARRAY_ELEMS
6053                                                                                                 : m_ioType == IO_TYPE_PER_PATCH_BLOCK           ? 1
6054                                                                                                 : m_ioType == IO_TYPE_PER_PATCH_BLOCK_ARRAY     ? NUM_PER_PATCH_BLOCKS
6055                                                                                                 : -2;
6056                         const bool                              isArray         = (numElements != 1);
6057
6058                         DE_ASSERT(numElements != -2);
6059
6060                         if (isArray)
6061                         {
6062                                 tcsDeclarations += outMaybePatch + output.declareArray(m_ioType == IO_TYPE_PER_PATCH_ARRAY                                                                                      ? de::toString(int(NUM_PER_PATCH_ARRAY_ELEMS))
6063                                                                                                                                            : m_ioType == IO_TYPE_PER_PATCH_BLOCK_ARRAY                                                                  ? de::toString(int(NUM_PER_PATCH_BLOCKS))
6064                                                                                                                                            : m_tessControlOutArraySize == TESS_CONTROL_OUT_ARRAY_SIZE_LAYOUT                    ? de::toString(int(NUM_OUTPUT_VERTICES))
6065                                                                                                                                            : m_tessControlOutArraySize == TESS_CONTROL_OUT_ARRAY_SIZE_QUERY                             ? de::toString(m_context.getContextInfo().getInt(GL_MAX_PATCH_VERTICES))
6066                                                                                                                                            : m_tessControlOutArraySize == TESS_CONTROL_OUT_ARRAY_SIZE_SHADER_BUILTIN    ? "gl_MaxPatchVertices"
6067                                                                                                                                            : "");
6068                         }
6069                         else
6070                                 tcsDeclarations += outMaybePatch + output.declare();
6071
6072                         if (!isPerPatchIO)
6073                                 tcsStatements += "\t\tv += float(gl_InvocationID)*" + de::floatToString(0.4f * (float)output.numBasicSubobjectsInElementType(), 1) + ";\n";
6074
6075                         tcsStatements += "\n\t\t// Assign values to output " + output.name() + "\n";
6076                         if (isArray)
6077                                 tcsStatements += output.glslTraverseBasicTypeArray(numElements, 2, glslAssignBasicTypeObject);
6078                         else
6079                                 tcsStatements += output.glslTraverseBasicType(2, glslAssignBasicTypeObject);
6080
6081                         if (!isPerPatchIO)
6082                                 tcsStatements += "\t\tv += float(" + de::toString(int(NUM_OUTPUT_VERTICES)) + "-gl_InvocationID-1)*" + de::floatToString(0.4f * (float)output.numBasicSubobjectsInElementType(), 1) + ";\n";
6083                 }
6084                 tcsStatements += "\t}\n";
6085
6086                 if (usedStruct)
6087                         tesDeclarations += de::toString(glu::declare(structType)) + ";\n";
6088
6089                 tesStatements += "\tbool allOk = true;\n"
6090                                                  "\thighp uint firstFailedInputIndex = 0u;\n"
6091                                                  "\t{\n"
6092                                                  "\t\thighp float v = 1.3;\n";
6093                 for (int tesInputNdx = 0; tesInputNdx < (int)m_tesInputs.size(); tesInputNdx++)
6094                 {
6095                         const TopLevelObject&   input           = *m_tesInputs[tesInputNdx];
6096                         const int                               numElements     = !isPerPatchIO                                                         ? (int)NUM_OUTPUT_VERTICES
6097                                                                                                 : m_ioType == IO_TYPE_PER_PATCH                         ? 1
6098                                                                                                 : m_ioType == IO_TYPE_PER_PATCH_BLOCK           ? 1
6099                                                                                                 : m_ioType == IO_TYPE_PER_PATCH_ARRAY           ? NUM_PER_PATCH_ARRAY_ELEMS
6100                                                                                                 : m_ioType == IO_TYPE_PER_PATCH_BLOCK_ARRAY     ? NUM_PER_PATCH_BLOCKS
6101                                                                                                 : -2;
6102                         const bool                              isArray         = (numElements != 1);
6103
6104                         DE_ASSERT(numElements != -2);
6105
6106                         if (isArray)
6107                                 tesDeclarations += inMaybePatch + input.declareArray(m_ioType == IO_TYPE_PER_PATCH_ARRAY                        ? de::toString(int(NUM_PER_PATCH_ARRAY_ELEMS))
6108                                                                                                                                          : m_ioType == IO_TYPE_PER_PATCH_BLOCK_ARRAY    ? de::toString(int(NUM_PER_PATCH_BLOCKS))
6109                                                                                                                                          : isExplicitVertexArraySize                                    ? de::toString(vertexAttrArrayInputSize)
6110                                                                                                                                          : "");
6111                         else
6112                                 tesDeclarations += inMaybePatch + input.declare();
6113
6114                         tesStatements += "\n\t\t// Check values in input " + input.name() + "\n";
6115                         if (isArray)
6116                                 tesStatements += input.glslTraverseBasicTypeArray(numElements, 2, glslCheckBasicTypeObject);
6117                         else
6118                                 tesStatements += input.glslTraverseBasicType(2, glslCheckBasicTypeObject);
6119                 }
6120                 tesStatements += "\t}\n";
6121         }
6122
6123         std::string vertexShaderTemplate                        ("${GLSL_VERSION_DECL}\n"
6124                                                                                                  "\n"
6125                                                                                                  "in highp float in_v_attr;\n"
6126                                                                                                  "out highp float in_tc_attr;\n"
6127                                                                                                  "\n"
6128                                                                                                  "void main (void)\n"
6129                                                                                                  "{\n"
6130                                                                                                  "      in_tc_attr = in_v_attr;\n"
6131                                                                                                  "}\n");
6132         std::string tessellationControlTemplate         ("${GLSL_VERSION_DECL}\n"
6133                                                                                                  "${TESSELLATION_SHADER_REQUIRE}\n"
6134                                                                                                  "\n"
6135                                                                                                  "layout (vertices = " + de::toString(int(NUM_OUTPUT_VERTICES)) + ") out;\n"
6136                                                                                                  "\n"
6137                                                                                                  + tcsDeclarations +
6138                                                                                                  "\n"
6139                                                                                                  "patch out highp vec2 in_te_positionScale;\n"
6140                                                                                                  "patch out highp vec2 in_te_positionOffset;\n"
6141                                                                                                  "\n"
6142                                                                                                  "void main (void)\n"
6143                                                                                                  "{\n"
6144                                                                                                  + tcsStatements +
6145                                                                                                  "\n"
6146                                                                                                  "      in_te_positionScale  = vec2(in_tc_attr[6], in_tc_attr[7]);\n"
6147                                                                                                  "      in_te_positionOffset = vec2(in_tc_attr[8], in_tc_attr[9]);\n"
6148                                                                                                  "\n"
6149                                                                                                  "      gl_TessLevelInner[0] = in_tc_attr[0];\n"
6150                                                                                                  "      gl_TessLevelInner[1] = in_tc_attr[1];\n"
6151                                                                                                  "\n"
6152                                                                                                  "      gl_TessLevelOuter[0] = in_tc_attr[2];\n"
6153                                                                                                  "      gl_TessLevelOuter[1] = in_tc_attr[3];\n"
6154                                                                                                  "      gl_TessLevelOuter[2] = in_tc_attr[4];\n"
6155                                                                                                  "      gl_TessLevelOuter[3] = in_tc_attr[5];\n"
6156                                                                                                  "}\n");
6157         std::string tessellationEvaluationTemplate      ("${GLSL_VERSION_DECL}\n"
6158                                                                                                  "${TESSELLATION_SHADER_REQUIRE}\n"
6159                                                                                                  "\n"
6160                                                                                                  + getTessellationEvaluationInLayoutString(m_primitiveType) +
6161                                                                                                  "\n"
6162                                                                                                  + tesDeclarations +
6163                                                                                                  "\n"
6164                                                                                                  "patch in highp vec2 in_te_positionScale;\n"
6165                                                                                                  "patch in highp vec2 in_te_positionOffset;\n"
6166                                                                                                  "\n"
6167                                                                                                  "out highp vec4 in_f_color;\n"
6168                                                                                                  "// Will contain the index of the first incorrect input,\n"
6169                                                                                                  "// or the number of inputs if all are correct\n"
6170                                                                                                  "flat out highp uint out_te_firstFailedInputIndex;\n"
6171                                                                                                  "\n"
6172                                                                                                  "bool compare_int   (int   a, int   b) { return a == b; }\n"
6173                                                                                                  "bool compare_float (float a, float b) { return abs(a - b) < 0.01f; }\n"
6174                                                                                                  "bool compare_vec4  (vec4  a, vec4  b) { return all(lessThan(abs(a - b), vec4(0.01f))); }\n"
6175                                                                                                  "\n"
6176                                                                                                  "void main (void)\n"
6177                                                                                                  "{\n"
6178                                                                                                  + tesStatements +
6179                                                                                                  "\n"
6180                                                                                                  "      gl_Position = vec4(gl_TessCoord.xy*in_te_positionScale + in_te_positionOffset, 0.0, 1.0);\n"
6181                                                                                                  "      in_f_color = allOk ? vec4(0.0, 1.0, 0.0, 1.0)\n"
6182                                                                                                  "                         : vec4(1.0, 0.0, 0.0, 1.0);\n"
6183                                                                                                  "      out_te_firstFailedInputIndex = firstFailedInputIndex;\n"
6184                                                                                                  "}\n");
6185         std::string fragmentShaderTemplate                      ("${GLSL_VERSION_DECL}\n"
6186                                                                                                  "\n"
6187                                                                                                  "layout (location = 0) out mediump vec4 o_color;\n"
6188                                                                                                  "\n"
6189                                                                                                  "in highp vec4 in_f_color;\n"
6190                                                                                                  "\n"
6191                                                                                                  "void main (void)\n"
6192                                                                                                  "{\n"
6193                                                                                                  "      o_color = in_f_color;\n"
6194                                                                                                  "}\n");
6195
6196         m_program = SharedPtr<const ShaderProgram>(new ShaderProgram(m_context.getRenderContext(), glu::ProgramSources()
6197                 << glu::VertexSource                                    (specializeShader(m_context, vertexShaderTemplate.c_str()))
6198                 << glu::TessellationControlSource               (specializeShader(m_context, tessellationControlTemplate.c_str()))
6199                 << glu::TessellationEvaluationSource    (specializeShader(m_context, tessellationEvaluationTemplate.c_str()))
6200                 << glu::FragmentSource                                  (specializeShader(m_context, fragmentShaderTemplate.c_str()))
6201                 << glu::TransformFeedbackVarying                ("out_te_firstFailedInputIndex")
6202                 << glu::TransformFeedbackMode                   (GL_INTERLEAVED_ATTRIBS)));
6203
6204         m_testCtx.getLog() << *m_program;
6205         if (!m_program->isOk())
6206                 TCU_FAIL("Program compilation failed");
6207 }
6208
6209 void UserDefinedIOCase::deinit (void)
6210 {
6211         m_program.clear();
6212 }
6213
6214 UserDefinedIOCase::IterateResult UserDefinedIOCase::iterate (void)
6215 {
6216         typedef TransformFeedbackHandler<deUint32> TFHandler;
6217
6218         TestLog&                                log                                             = m_testCtx.getLog();
6219         const RenderContext&    renderCtx                               = m_context.getRenderContext();
6220         const RandomViewport    viewport                                (renderCtx.getRenderTarget(), RENDER_SIZE, RENDER_SIZE, deStringHash(getName()));
6221         const glw::Functions&   gl                                              = renderCtx.getFunctions();
6222         static const float              attributes[6+2+2]               = { /* inner */ 3.0f, 4.0f, /* outer */ 5.0f, 6.0f, 7.0f, 8.0f, /* pos. scale */ 1.2f, 1.3f, /* pos. offset */ -0.3f, -0.4f };
6223         const deUint32                  programGL                               = m_program->getProgram();
6224         const int                               numVertices                             = referenceVertexCount(m_primitiveType, SPACINGMODE_EQUAL, false, &attributes[0], &attributes[2]);
6225         const TFHandler                 tfHandler                               (renderCtx, numVertices);
6226         tcu::ResultCollector    result;
6227
6228         gl.useProgram(programGL);
6229         setViewport(gl, viewport);
6230         gl.patchParameteri(GL_PATCH_VERTICES, DE_LENGTH_OF_ARRAY(attributes));
6231
6232         gl.clearColor(0.0f, 0.0f, 0.0f, 1.0f);
6233         gl.clear(GL_COLOR_BUFFER_BIT);
6234
6235         {
6236                 const glu::VertexArrayBinding   bindings[]      = { glu::va::Float("in_v_attr", 1, DE_LENGTH_OF_ARRAY(attributes), 0, &attributes[0]) };
6237                 const TFHandler::Result                 tfResult        = tfHandler.renderAndGetPrimitives(programGL, outputPrimitiveTypeGL(m_primitiveType, false),
6238                                                                                                                                                                            DE_LENGTH_OF_ARRAY(bindings), &bindings[0], DE_LENGTH_OF_ARRAY(attributes));
6239
6240                 {
6241                         const tcu::Surface                      pixels          = getPixels(renderCtx, viewport);
6242                         const tcu::TextureLevel         reference       = getPNG(m_testCtx.getArchive(), m_referenceImagePath.c_str());
6243                         const bool                                      success         = tcu::fuzzyCompare(log, "ImageComparison", "Image Comparison", reference.getAccess(), pixels.getAccess(), 0.02f, tcu::COMPARE_LOG_RESULT);
6244
6245                         if (!success)
6246                                 result.fail("Image comparison failed");
6247                 }
6248
6249                 if ((int)tfResult.varying.size() != numVertices)
6250                 {
6251                         log << TestLog::Message << "Failure: transform feedback returned " << tfResult.varying.size() << " vertices; expected " << numVertices << TestLog::EndMessage;
6252                         result.fail("Wrong number of vertices");
6253                 }
6254                 else
6255                 {
6256                         const int topLevelArraySize             = (m_ioType == IO_TYPE_PER_PATCH                                ? 1
6257                                                                                          : m_ioType == IO_TYPE_PER_PATCH_ARRAY                  ? NUM_PER_PATCH_ARRAY_ELEMS
6258                                                                                          : m_ioType == IO_TYPE_PER_PATCH_BLOCK                  ? 1
6259                                                                                          : m_ioType == IO_TYPE_PER_PATCH_BLOCK_ARRAY    ? NUM_PER_PATCH_BLOCKS
6260                                                                                          : (int)NUM_OUTPUT_VERTICES);
6261                         const int numTEInputs                   = numBasicSubobjectsInElementType(m_tesInputs) * topLevelArraySize;
6262
6263                         for (int vertexNdx = 0; vertexNdx < (int)numVertices; vertexNdx++)
6264                         {
6265                                 if (tfResult.varying[vertexNdx] > (deUint32)numTEInputs)
6266                                 {
6267                                         log << TestLog::Message << "Failure: out_te_firstFailedInputIndex has value " << tfResult.varying[vertexNdx]
6268                                                                                         << ", should be in range [0, " << numTEInputs << "]" << TestLog::EndMessage;
6269                                         result.fail("Invalid transform feedback output");
6270                                 }
6271                                 else if (tfResult.varying[vertexNdx] != (deUint32)numTEInputs)
6272                                 {
6273                                         log << TestLog::Message << "Failure: in tessellation evaluation shader, check for input "
6274                                                                                         << basicSubobjectAtIndex(tfResult.varying[vertexNdx], m_tesInputs, topLevelArraySize) << " failed" << TestLog::EndMessage;
6275                                         result.fail("Invalid input value in tessellation evaluation shader");
6276                                 }
6277                         }
6278                 }
6279         }
6280
6281         result.setTestContextResult(m_testCtx);
6282         return STOP;
6283 }
6284
6285 /*--------------------------------------------------------------------*//*!
6286  * \brief Pass gl_Position between VS and TCS, or between TCS and TES.
6287  *
6288  * In TCS gl_Position is in the gl_out[] block and in TES in the gl_in[]
6289  * block, and has no special semantics in those. Arbitrary vec4 data can
6290  * thus be passed there.
6291  *//*--------------------------------------------------------------------*/
6292 class GLPositionCase : public TestCase
6293 {
6294 public:
6295         enum CaseType
6296         {
6297                 CASETYPE_VS_TO_TCS = 0,
6298                 CASETYPE_TCS_TO_TES,
6299                 CASETYPE_VS_TO_TCS_TO_TES,
6300
6301                 CASETYPE_LAST
6302         };
6303
6304         GLPositionCase (Context& context, const char* name, const char* description, CaseType caseType, const char* referenceImagePath)
6305                 : TestCase                              (context, name, description)
6306                 , m_caseType                    (caseType)
6307                 , m_referenceImagePath  (referenceImagePath)
6308         {
6309         }
6310
6311         void                                                                    init                            (void);
6312         void                                                                    deinit                          (void);
6313         IterateResult                                                   iterate                         (void);
6314
6315         static const char*                                              getCaseTypeName         (CaseType type);
6316
6317 private:
6318         static const int                                                RENDER_SIZE = 256;
6319
6320         const CaseType                                                  m_caseType;
6321         const string                                                    m_referenceImagePath;
6322
6323         SharedPtr<const glu::ShaderProgram>             m_program;
6324 };
6325
6326 const char* GLPositionCase::getCaseTypeName (CaseType type)
6327 {
6328         switch (type)
6329         {
6330                 case CASETYPE_VS_TO_TCS:                        return "gl_position_vs_to_tcs";
6331                 case CASETYPE_TCS_TO_TES:                       return "gl_position_tcs_to_tes";
6332                 case CASETYPE_VS_TO_TCS_TO_TES:         return "gl_position_vs_to_tcs_to_tes";
6333                 default:
6334                         DE_ASSERT(false); return DE_NULL;
6335         }
6336 }
6337
6338 void GLPositionCase::init (void)
6339 {
6340         checkTessellationSupport(m_context);
6341         checkRenderTargetSize(m_context.getRenderTarget(), RENDER_SIZE);
6342
6343         const bool              vsToTCS         = m_caseType == CASETYPE_VS_TO_TCS              || m_caseType == CASETYPE_VS_TO_TCS_TO_TES;
6344         const bool              tcsToTES        = m_caseType == CASETYPE_TCS_TO_TES             || m_caseType == CASETYPE_VS_TO_TCS_TO_TES;
6345
6346         const string    tesIn0          = tcsToTES ? "gl_in[0].gl_Position" : "in_te_attr[0]";
6347         const string    tesIn1          = tcsToTES ? "gl_in[1].gl_Position" : "in_te_attr[1]";
6348         const string    tesIn2          = tcsToTES ? "gl_in[2].gl_Position" : "in_te_attr[2]";
6349
6350         std::string vertexShaderTemplate                        ("${GLSL_VERSION_DECL}\n"
6351                                                                                                  "\n"
6352                                                                                                  "in highp vec4 in_v_attr;\n"
6353                                                                                                  + string(!vsToTCS ? "out highp vec4 in_tc_attr;\n" : "") +
6354                                                                                                  "\n"
6355                                                                                                  "void main (void)\n"
6356                                                                                                  "{\n"
6357                                                                                                  "      " + (vsToTCS ? "gl_Position" : "in_tc_attr") + " = in_v_attr;\n"
6358                                                                                                  "}\n");
6359         std::string tessellationControlTemplate         ("${GLSL_VERSION_DECL}\n"
6360                                                                                                  "${TESSELLATION_SHADER_REQUIRE}\n"
6361                                                                                                  "\n"
6362                                                                                                  "layout (vertices = 3) out;\n"
6363                                                                                                  "\n"
6364                                                                                                  + string(!vsToTCS ? "in highp vec4 in_tc_attr[];\n" : "") +
6365                                                                                                  "\n"
6366                                                                                                  + (!tcsToTES ? "out highp vec4 in_te_attr[];\n" : "") +
6367                                                                                                  "\n"
6368                                                                                                  "void main (void)\n"
6369                                                                                                  "{\n"
6370                                                                                                  "      " + (tcsToTES ? "gl_out[gl_InvocationID].gl_Position" : "in_te_attr[gl_InvocationID]") + " = "
6371                                                                                                           + (vsToTCS ? "gl_in[gl_InvocationID].gl_Position" : "in_tc_attr[gl_InvocationID]") + ";\n"
6372                                                                                                  "\n"
6373                                                                                                  "      gl_TessLevelInner[0] = 2.0;\n"
6374                                                                                                  "      gl_TessLevelInner[1] = 3.0;\n"
6375                                                                                                  "\n"
6376                                                                                                  "      gl_TessLevelOuter[0] = 4.0;\n"
6377                                                                                                  "      gl_TessLevelOuter[1] = 5.0;\n"
6378                                                                                                  "      gl_TessLevelOuter[2] = 6.0;\n"
6379                                                                                                  "      gl_TessLevelOuter[3] = 7.0;\n"
6380                                                                                                  "}\n");
6381         std::string tessellationEvaluationTemplate      ("${GLSL_VERSION_DECL}\n"
6382                                                                                                  "${TESSELLATION_SHADER_REQUIRE}\n"
6383                                                                                                  "\n"
6384                                                                                                  + getTessellationEvaluationInLayoutString(TESSPRIMITIVETYPE_TRIANGLES) +
6385                                                                                                  "\n"
6386                                                                                                  + (!tcsToTES ? "in highp vec4 in_te_attr[];\n" : "") +
6387                                                                                                  "\n"
6388                                                                                                  "out highp vec4 in_f_color;\n"
6389                                                                                                  "\n"
6390                                                                                                  "void main (void)\n"
6391                                                                                                  "{\n"
6392                                                                                                  "      highp vec2 xy = gl_TessCoord.x * " + tesIn0 + ".xy\n"
6393                                                                                                  "                    + gl_TessCoord.y * " + tesIn1 + ".xy\n"
6394                                                                                                  "                    + gl_TessCoord.z * " + tesIn2 + ".xy;\n"
6395                                                                                                  "      gl_Position = vec4(xy, 0.0, 1.0);\n"
6396                                                                                                  "      in_f_color = vec4(" + tesIn0 + ".z + " + tesIn1 + ".w,\n"
6397                                                                                                  "                        " + tesIn2 + ".z + " + tesIn0 + ".w,\n"
6398                                                                                                  "                        " + tesIn1 + ".z + " + tesIn2 + ".w,\n"
6399                                                                                                  "                        1.0);\n"
6400                                                                                                  "}\n");
6401         std::string fragmentShaderTemplate                      ("${GLSL_VERSION_DECL}\n"
6402                                                                                                  "\n"
6403                                                                                                  "layout (location = 0) out mediump vec4 o_color;\n"
6404                                                                                                  "\n"
6405                                                                                                  "in highp vec4 in_f_color;\n"
6406                                                                                                  "\n"
6407                                                                                                  "void main (void)\n"
6408                                                                                                  "{\n"
6409                                                                                                  "      o_color = in_f_color;\n"
6410                                                                                                  "}\n");
6411
6412         m_program = SharedPtr<const ShaderProgram>(new ShaderProgram(m_context.getRenderContext(), glu::ProgramSources()
6413                 << glu::VertexSource                                    (specializeShader(m_context, vertexShaderTemplate.c_str()))
6414                 << glu::TessellationControlSource               (specializeShader(m_context, tessellationControlTemplate.c_str()))
6415                 << glu::TessellationEvaluationSource    (specializeShader(m_context, tessellationEvaluationTemplate.c_str()))
6416                 << glu::FragmentSource                                  (specializeShader(m_context, fragmentShaderTemplate.c_str()))));
6417
6418         m_testCtx.getLog() << *m_program;
6419         if (!m_program->isOk())
6420                 TCU_FAIL("Program compilation failed");
6421 }
6422
6423 void GLPositionCase::deinit (void)
6424 {
6425         m_program.clear();
6426 }
6427
6428 GLPositionCase::IterateResult GLPositionCase::iterate (void)
6429 {
6430         TestLog&                                log                                             = m_testCtx.getLog();
6431         const RenderContext&    renderCtx                               = m_context.getRenderContext();
6432         const RandomViewport    viewport                                (renderCtx.getRenderTarget(), RENDER_SIZE, RENDER_SIZE, deStringHash(getName()));
6433         const glw::Functions&   gl                                              = renderCtx.getFunctions();
6434         const deUint32                  programGL                               = m_program->getProgram();
6435
6436         static const float attributes[3*4] =
6437         {
6438                 -0.8f, -0.7f, 0.1f, 0.7f,
6439                 -0.5f,  0.4f, 0.2f, 0.5f,
6440                  0.3f,  0.2f, 0.3f, 0.45f
6441         };
6442
6443         gl.useProgram(programGL);
6444         setViewport(gl, viewport);
6445         gl.patchParameteri(GL_PATCH_VERTICES, 3);
6446
6447         gl.clearColor(0.0f, 0.0f, 0.0f, 1.0f);
6448         gl.clear(GL_COLOR_BUFFER_BIT);
6449
6450         log << TestLog::Message << "Note: input data for in_v_attr:\n" << arrayStr(attributes, 4) << TestLog::EndMessage;
6451
6452         {
6453                 const glu::VertexArrayBinding bindings[] = { glu::va::Float("in_v_attr", 4, 3, 0, &attributes[0]) };
6454                 glu::draw(renderCtx, programGL, DE_LENGTH_OF_ARRAY(bindings), &bindings[0], glu::pr::Patches(3));
6455
6456                 {
6457                         const tcu::Surface                      pixels          = getPixels(renderCtx, viewport);
6458                         const tcu::TextureLevel         reference       = getPNG(m_testCtx.getArchive(), m_referenceImagePath.c_str());
6459                         const bool                                      success         = tcu::fuzzyCompare(log, "ImageComparison", "Image Comparison", reference.getAccess(), pixels.getAccess(), 0.02f, tcu::COMPARE_LOG_RESULT);
6460
6461                         if (!success)
6462                         {
6463                                 m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "Image comparison failed");
6464                                 return STOP;
6465                         }
6466                 }
6467         }
6468
6469         m_testCtx.setTestResult(QP_TEST_RESULT_PASS, "Pass");
6470         return STOP;
6471 }
6472
6473 class LimitQueryCase : public TestCase
6474 {
6475 public:
6476                                                 LimitQueryCase  (Context& context, const char* name, const char* desc, glw::GLenum target, int minValue);
6477 private:
6478         IterateResult           iterate                 (void);
6479
6480         const glw::GLenum       m_target;
6481         const int                       m_minValue;
6482 };
6483
6484 LimitQueryCase::LimitQueryCase (Context& context, const char* name, const char* desc, glw::GLenum target, int minValue)
6485         : TestCase                      (context, name, desc)
6486         , m_target                      (target)
6487         , m_minValue            (minValue)
6488 {
6489 }
6490
6491 LimitQueryCase::IterateResult LimitQueryCase::iterate (void)
6492 {
6493         checkTessellationSupport(m_context);
6494
6495         glu::CallLogWrapper             gl              (m_context.getRenderContext().getFunctions(), m_testCtx.getLog());
6496         tcu::ResultCollector    result  (m_testCtx.getLog(), " // ERROR: ");
6497
6498         gl.enableLogging(true);
6499         verifyStateIntegerMin(result, gl, m_target, m_minValue, QUERY_INTEGER);
6500
6501         {
6502                 const tcu::ScopedLogSection     section(m_testCtx.getLog(), "Types", "Alternative queries");
6503                 verifyStateIntegerMin(result, gl, m_target, m_minValue, QUERY_BOOLEAN);
6504                 verifyStateIntegerMin(result, gl, m_target, m_minValue, QUERY_INTEGER64);
6505                 verifyStateIntegerMin(result, gl, m_target, m_minValue, QUERY_FLOAT);
6506         }
6507
6508         result.setTestContextResult(m_testCtx);
6509         return STOP;
6510 }
6511
6512 class CombinedUniformLimitCase : public TestCase
6513 {
6514 public:
6515                                                 CombinedUniformLimitCase        (Context& context, const char* name, const char* desc, glw::GLenum combined, glw::GLenum numBlocks, glw::GLenum defaultComponents);
6516 private:
6517         IterateResult           iterate                                         (void);
6518
6519         const glw::GLenum       m_combined;
6520         const glw::GLenum       m_numBlocks;
6521         const glw::GLenum       m_defaultComponents;
6522 };
6523
6524 CombinedUniformLimitCase::CombinedUniformLimitCase (Context& context, const char* name, const char* desc, glw::GLenum combined, glw::GLenum numBlocks, glw::GLenum defaultComponents)
6525         : TestCase                              (context, name, desc)
6526         , m_combined                    (combined)
6527         , m_numBlocks                   (numBlocks)
6528         , m_defaultComponents   (defaultComponents)
6529 {
6530 }
6531
6532 CombinedUniformLimitCase::IterateResult CombinedUniformLimitCase::iterate (void)
6533 {
6534         checkTessellationSupport(m_context);
6535
6536         glu::CallLogWrapper             gl              (m_context.getRenderContext().getFunctions(), m_testCtx.getLog());
6537         tcu::ResultCollector    result  (m_testCtx.getLog(), " // ERROR: ");
6538
6539         gl.enableLogging(true);
6540
6541         m_testCtx.getLog()      << tcu::TestLog::Message
6542                                                 << "The minimum value of " << glu::getGettableStateStr(m_combined)
6543                                                 << " is " << glu::getGettableStateStr(m_numBlocks)
6544                                                 << " x MAX_UNIFORM_BLOCK_SIZE / 4 + "
6545                                                 << glu::getGettableStateStr(m_defaultComponents)
6546                                                 << tcu::TestLog::EndMessage;
6547
6548         StateQueryMemoryWriteGuard<glw::GLint> maxUniformBlocks;
6549         gl.glGetIntegerv(m_numBlocks, &maxUniformBlocks);
6550         GLS_COLLECT_GL_ERROR(result, gl.glGetError(), "glGetIntegerv");
6551
6552         StateQueryMemoryWriteGuard<glw::GLint> maxUniformBlockSize;
6553         gl.glGetIntegerv(GL_MAX_UNIFORM_BLOCK_SIZE, &maxUniformBlockSize);
6554         GLS_COLLECT_GL_ERROR(result, gl.glGetError(), "glGetIntegerv");
6555
6556         StateQueryMemoryWriteGuard<glw::GLint> maxUniformComponents;
6557         gl.glGetIntegerv(m_defaultComponents, &maxUniformComponents);
6558         GLS_COLLECT_GL_ERROR(result, gl.glGetError(), "glGetIntegerv");
6559
6560         if (maxUniformBlocks.verifyValidity(result) && maxUniformBlockSize.verifyValidity(result) && maxUniformComponents.verifyValidity(result))
6561         {
6562                 const int limit = ((int)maxUniformBlocks) * ((int)maxUniformBlockSize) / 4 + (int)maxUniformComponents;
6563                 verifyStateIntegerMin(result, gl, m_combined, limit, QUERY_INTEGER);
6564
6565                 {
6566                         const tcu::ScopedLogSection     section(m_testCtx.getLog(), "Types", "Alternative queries");
6567                         verifyStateIntegerMin(result, gl, m_combined, limit, QUERY_BOOLEAN);
6568                         verifyStateIntegerMin(result, gl, m_combined, limit, QUERY_INTEGER64);
6569                         verifyStateIntegerMin(result, gl, m_combined, limit, QUERY_FLOAT);
6570                 }
6571         }
6572
6573         result.setTestContextResult(m_testCtx);
6574         return STOP;
6575 }
6576
6577 class PatchVerticesStateCase : public TestCase
6578 {
6579 public:
6580                                                 PatchVerticesStateCase  (Context& context, const char* name, const char* desc);
6581 private:
6582         IterateResult           iterate                                 (void);
6583 };
6584
6585 PatchVerticesStateCase::PatchVerticesStateCase (Context& context, const char* name, const char* desc)
6586         : TestCase(context, name, desc)
6587 {
6588 }
6589
6590 PatchVerticesStateCase::IterateResult PatchVerticesStateCase::iterate (void)
6591 {
6592         checkTessellationSupport(m_context);
6593
6594         glu::CallLogWrapper             gl              (m_context.getRenderContext().getFunctions(), m_testCtx.getLog());
6595         tcu::ResultCollector    result  (m_testCtx.getLog(), " // ERROR: ");
6596
6597         gl.enableLogging(true);
6598
6599         // initial
6600         {
6601                 const tcu::ScopedLogSection section(m_testCtx.getLog(), "initial", "Initial value");
6602
6603                 verifyStateInteger(result, gl, GL_PATCH_VERTICES, 3, QUERY_INTEGER);
6604         }
6605
6606         // bind
6607         {
6608                 const tcu::ScopedLogSection section(m_testCtx.getLog(), "set", "After set");
6609
6610                 gl.glPatchParameteri(GL_PATCH_VERTICES, 22);
6611                 GLS_COLLECT_GL_ERROR(result, gl.glGetError(), "glPatchParameteri");
6612
6613                 verifyStateInteger(result, gl, GL_PATCH_VERTICES, 22, QUERY_INTEGER);
6614                 {
6615                         const tcu::ScopedLogSection     subsection(m_testCtx.getLog(), "Types", "Alternative queries");
6616                         verifyStateIntegerMin(result, gl, GL_PATCH_VERTICES, 22, QUERY_BOOLEAN);
6617                         verifyStateIntegerMin(result, gl, GL_PATCH_VERTICES, 22, QUERY_INTEGER64);
6618                         verifyStateIntegerMin(result, gl, GL_PATCH_VERTICES, 22, QUERY_FLOAT);
6619                 }
6620         }
6621
6622         result.setTestContextResult(m_testCtx);
6623         return STOP;
6624 }
6625
6626 class PrimitiveRestartForPatchesSupportedCase : public TestCase
6627 {
6628 public:
6629                                                 PrimitiveRestartForPatchesSupportedCase (Context& context, const char* name, const char* desc);
6630 private:
6631         IterateResult           iterate                                                                 (void);
6632 };
6633
6634 PrimitiveRestartForPatchesSupportedCase::PrimitiveRestartForPatchesSupportedCase (Context& context, const char* name, const char* desc)
6635         : TestCase(context, name, desc)
6636 {
6637 }
6638
6639 PrimitiveRestartForPatchesSupportedCase::IterateResult PrimitiveRestartForPatchesSupportedCase::iterate (void)
6640 {
6641         checkTessellationSupport(m_context);
6642
6643         glu::CallLogWrapper             gl              (m_context.getRenderContext().getFunctions(), m_testCtx.getLog());
6644         tcu::ResultCollector    result  (m_testCtx.getLog(), " // ERROR: ");
6645         QueriedState                    state;
6646
6647         gl.enableLogging(true);
6648
6649         queryState(result, gl, QUERY_BOOLEAN, GL_PRIMITIVE_RESTART_FOR_PATCHES_SUPPORTED, state);
6650
6651         if (!state.isUndefined())
6652         {
6653                 const tcu::ScopedLogSection     subsection(m_testCtx.getLog(), "Types", "Alternative types");
6654                 verifyStateBoolean(result, gl, GL_PRIMITIVE_RESTART_FOR_PATCHES_SUPPORTED, state.getBoolAccess(), QUERY_INTEGER);
6655                 verifyStateBoolean(result, gl, GL_PRIMITIVE_RESTART_FOR_PATCHES_SUPPORTED, state.getBoolAccess(), QUERY_INTEGER64);
6656                 verifyStateBoolean(result, gl, GL_PRIMITIVE_RESTART_FOR_PATCHES_SUPPORTED, state.getBoolAccess(), QUERY_FLOAT);
6657         }
6658
6659         result.setTestContextResult(m_testCtx);
6660         return STOP;
6661 }
6662
6663 class TessProgramQueryCase : public TestCase
6664 {
6665 public:
6666                                                 TessProgramQueryCase    (Context& context, const char* name, const char* desc);
6667
6668         std::string                     getVertexSource                 (void) const;
6669         std::string                     getFragmentSource               (void) const;
6670         std::string                     getTessCtrlSource               (const char* globalLayouts) const;
6671         std::string                     getTessEvalSource               (const char* globalLayouts) const;
6672 };
6673
6674 TessProgramQueryCase::TessProgramQueryCase (Context& context, const char* name, const char* desc)
6675         : TestCase(context, name, desc)
6676 {
6677 }
6678
6679 std::string TessProgramQueryCase::getVertexSource (void) const
6680 {
6681         return  "${GLSL_VERSION_DECL}\n"
6682                         "void main (void)\n"
6683                         "{\n"
6684                         "       gl_Position = vec4(float(gl_VertexID), float(gl_VertexID / 2), 0.0, 1.0);\n"
6685                         "}\n";
6686 }
6687
6688 std::string TessProgramQueryCase::getFragmentSource (void) const
6689 {
6690         return  "${GLSL_VERSION_DECL}\n"
6691                         "layout (location = 0) out mediump vec4 o_color;\n"
6692                         "void main (void)\n"
6693                         "{\n"
6694                         "       o_color = vec4(0.0, 1.0, 0.0, 1.0);\n"
6695                         "}\n";
6696 }
6697
6698 std::string TessProgramQueryCase::getTessCtrlSource (const char* globalLayouts) const
6699 {
6700         return  "${GLSL_VERSION_DECL}\n"
6701                         "${TESSELLATION_SHADER_REQUIRE}\n"
6702                         + std::string(globalLayouts) + ";\n"
6703                         "void main (void)\n"
6704                         "{\n"
6705                         "       gl_out[gl_InvocationID].gl_Position = gl_in[gl_InvocationID].gl_Position;\n"
6706                         "       gl_TessLevelInner[0] = 2.8;\n"
6707                         "       gl_TessLevelInner[1] = 2.8;\n"
6708                         "       gl_TessLevelOuter[0] = 2.8;\n"
6709                         "       gl_TessLevelOuter[1] = 2.8;\n"
6710                         "       gl_TessLevelOuter[2] = 2.8;\n"
6711                         "       gl_TessLevelOuter[3] = 2.8;\n"
6712                         "}\n";
6713 }
6714
6715 std::string TessProgramQueryCase::getTessEvalSource (const char* globalLayouts) const
6716 {
6717         return  "${GLSL_VERSION_DECL}\n"
6718                         "${TESSELLATION_SHADER_REQUIRE}\n"
6719                         + std::string(globalLayouts) + ";\n"
6720                         "void main (void)\n"
6721                         "{\n"
6722                         "       gl_Position = gl_TessCoord.x * gl_in[0].gl_Position\n"
6723                         "                   + gl_TessCoord.y * gl_in[1].gl_Position\n"
6724                         "                   + gl_TessCoord.y * gl_in[2].gl_Position\n"
6725                         "                   + gl_TessCoord.z * gl_in[3].gl_Position;\n"
6726                         "}\n";
6727 }
6728
6729 class TessControlOutputVerticesCase : public TessProgramQueryCase
6730 {
6731 public:
6732                                                 TessControlOutputVerticesCase   (Context& context, const char* name, const char* desc);
6733 private:
6734         IterateResult           iterate                                                 (void);
6735 };
6736
6737 TessControlOutputVerticesCase::TessControlOutputVerticesCase (Context& context, const char* name, const char* desc)
6738         : TessProgramQueryCase(context, name, desc)
6739 {
6740 }
6741
6742 TessControlOutputVerticesCase::IterateResult TessControlOutputVerticesCase::iterate (void)
6743 {
6744         checkTessellationSupport(m_context);
6745
6746         glu::ShaderProgram program (m_context.getRenderContext(), glu::ProgramSources()
6747                                                                                                                                 << glu::VertexSource(specializeShader(m_context, getVertexSource().c_str()))
6748                                                                                                                                 << glu::FragmentSource(specializeShader(m_context, getFragmentSource().c_str()))
6749                                                                                                                                 << glu::TessellationControlSource(specializeShader(m_context, getTessCtrlSource("layout(vertices=4) out").c_str()))
6750                                                                                                                                 << glu::TessellationEvaluationSource(specializeShader(m_context, getTessEvalSource("layout(triangles) in").c_str())));
6751
6752         m_testCtx.getLog() << program;
6753         if (!program.isOk())
6754                 throw tcu::TestError("failed to build program");
6755
6756         {
6757                 glu::CallLogWrapper             gl              (m_context.getRenderContext().getFunctions(), m_testCtx.getLog());
6758                 tcu::ResultCollector    result  (m_testCtx.getLog(), " // ERROR: ");
6759
6760                 gl.enableLogging(true);
6761                 verifyStateProgramInteger(result, gl, program.getProgram(), GL_TESS_CONTROL_OUTPUT_VERTICES, 4, QUERY_PROGRAM_INTEGER);
6762
6763                 result.setTestContextResult(m_testCtx);
6764         }
6765         return STOP;
6766 }
6767
6768 class TessGenModeQueryCase : public TessProgramQueryCase
6769 {
6770 public:
6771                                                 TessGenModeQueryCase    (Context& context, const char* name, const char* desc);
6772 private:
6773         IterateResult           iterate                                 (void);
6774 };
6775
6776 TessGenModeQueryCase::TessGenModeQueryCase (Context& context, const char* name, const char* desc)
6777         : TessProgramQueryCase(context, name, desc)
6778 {
6779 }
6780
6781 TessGenModeQueryCase::IterateResult TessGenModeQueryCase::iterate (void)
6782 {
6783         tcu::ResultCollector    result  (m_testCtx.getLog(), " // ERROR: ");
6784         glu::CallLogWrapper             gl              (m_context.getRenderContext().getFunctions(), m_testCtx.getLog());
6785
6786         static const struct
6787         {
6788                 const char* description;
6789                 const char* layout;
6790                 glw::GLenum mode;
6791         } s_modes[] =
6792         {
6793                 { "Triangles",  "layout(triangles) in", GL_TRIANGLES    },
6794                 { "Isolines",   "layout(isolines) in",  GL_ISOLINES             },
6795                 { "Quads",              "layout(quads) in",             GL_QUADS                },
6796         };
6797
6798         checkTessellationSupport(m_context);
6799         gl.enableLogging(true);
6800
6801         for (int ndx = 0; ndx < DE_LENGTH_OF_ARRAY(s_modes); ++ndx)
6802         {
6803                 const tcu::ScopedLogSection     section(m_testCtx.getLog(), "Type", s_modes[ndx].description);
6804
6805                 glu::ShaderProgram program (m_context.getRenderContext(), glu::ProgramSources()
6806                                                                                                                                         << glu::VertexSource(specializeShader(m_context, getVertexSource().c_str()))
6807                                                                                                                                         << glu::FragmentSource(specializeShader(m_context, getFragmentSource().c_str()))
6808                                                                                                                                         << glu::TessellationControlSource(specializeShader(m_context, getTessCtrlSource("layout(vertices=6) out").c_str()))
6809                                                                                                                                         << glu::TessellationEvaluationSource(specializeShader(m_context, getTessEvalSource(s_modes[ndx].layout).c_str())));
6810
6811                 m_testCtx.getLog() << program;
6812                 if (!program.isOk())
6813                         result.fail("failed to build program");
6814                 else
6815                         verifyStateProgramInteger(result, gl, program.getProgram(), GL_TESS_GEN_MODE, s_modes[ndx].mode, QUERY_PROGRAM_INTEGER);
6816         }
6817
6818         result.setTestContextResult(m_testCtx);
6819         return STOP;
6820 }
6821
6822 class TessGenSpacingQueryCase : public TessProgramQueryCase
6823 {
6824 public:
6825                                                 TessGenSpacingQueryCase (Context& context, const char* name, const char* desc);
6826 private:
6827         IterateResult           iterate                                 (void);
6828 };
6829
6830 TessGenSpacingQueryCase::TessGenSpacingQueryCase (Context& context, const char* name, const char* desc)
6831         : TessProgramQueryCase(context, name, desc)
6832 {
6833 }
6834
6835 TessGenSpacingQueryCase::IterateResult TessGenSpacingQueryCase::iterate (void)
6836 {
6837         tcu::ResultCollector    result  (m_testCtx.getLog(), " // ERROR: ");
6838         glu::CallLogWrapper             gl              (m_context.getRenderContext().getFunctions(), m_testCtx.getLog());
6839
6840         static const struct
6841         {
6842                 const char* description;
6843                 const char* layout;
6844                 glw::GLenum spacing;
6845         } s_modes[] =
6846         {
6847                 { "Default spacing",                    "layout(triangles) in",                                                         GL_EQUAL                        },
6848                 { "Equal spacing",                              "layout(triangles, equal_spacing) in",                          GL_EQUAL                        },
6849                 { "Fractional even spacing",    "layout(triangles, fractional_even_spacing) in",        GL_FRACTIONAL_EVEN      },
6850                 { "Fractional odd spacing",             "layout(triangles, fractional_odd_spacing) in",         GL_FRACTIONAL_ODD       },
6851         };
6852
6853         checkTessellationSupport(m_context);
6854         gl.enableLogging(true);
6855
6856         for (int ndx = 0; ndx < DE_LENGTH_OF_ARRAY(s_modes); ++ndx)
6857         {
6858                 const tcu::ScopedLogSection     section(m_testCtx.getLog(), "Type", s_modes[ndx].description);
6859
6860                 glu::ShaderProgram program (m_context.getRenderContext(), glu::ProgramSources()
6861                                                                                                                                         << glu::VertexSource(specializeShader(m_context, getVertexSource().c_str()))
6862                                                                                                                                         << glu::FragmentSource(specializeShader(m_context, getFragmentSource().c_str()))
6863                                                                                                                                         << glu::TessellationControlSource(specializeShader(m_context, getTessCtrlSource("layout(vertices=6) out").c_str()))
6864                                                                                                                                         << glu::TessellationEvaluationSource(specializeShader(m_context, getTessEvalSource(s_modes[ndx].layout).c_str())));
6865
6866                 m_testCtx.getLog() << program;
6867                 if (!program.isOk())
6868                         result.fail("failed to build program");
6869                 else
6870                         verifyStateProgramInteger(result, gl, program.getProgram(), GL_TESS_GEN_SPACING, s_modes[ndx].spacing, QUERY_PROGRAM_INTEGER);
6871         }
6872
6873         result.setTestContextResult(m_testCtx);
6874         return STOP;
6875 }
6876
6877 class TessGenVertexOrderQueryCase : public TessProgramQueryCase
6878 {
6879 public:
6880                                                 TessGenVertexOrderQueryCase     (Context& context, const char* name, const char* desc);
6881 private:
6882         IterateResult           iterate                                         (void);
6883 };
6884
6885 TessGenVertexOrderQueryCase::TessGenVertexOrderQueryCase (Context& context, const char* name, const char* desc)
6886         : TessProgramQueryCase(context, name, desc)
6887 {
6888 }
6889
6890 TessGenVertexOrderQueryCase::IterateResult TessGenVertexOrderQueryCase::iterate (void)
6891 {
6892         tcu::ResultCollector    result  (m_testCtx.getLog(), " // ERROR: ");
6893         glu::CallLogWrapper             gl              (m_context.getRenderContext().getFunctions(), m_testCtx.getLog());
6894
6895         static const struct
6896         {
6897                 const char* description;
6898                 const char* layout;
6899                 glw::GLenum order;
6900         } s_modes[] =
6901         {
6902                 { "Default order",      "layout(triangles) in",                 GL_CCW  },
6903                 { "CW order",           "layout(triangles, cw) in",             GL_CW   },
6904                 { "CCW order",          "layout(triangles, ccw) in",    GL_CCW  },
6905         };
6906
6907         checkTessellationSupport(m_context);
6908         gl.enableLogging(true);
6909
6910         for (int ndx = 0; ndx < DE_LENGTH_OF_ARRAY(s_modes); ++ndx)
6911         {
6912                 const tcu::ScopedLogSection     section(m_testCtx.getLog(), "Type", s_modes[ndx].description);
6913
6914                 glu::ShaderProgram program (m_context.getRenderContext(), glu::ProgramSources()
6915                                                                                                                                         << glu::VertexSource(specializeShader(m_context, getVertexSource().c_str()))
6916                                                                                                                                         << glu::FragmentSource(specializeShader(m_context, getFragmentSource().c_str()))
6917                                                                                                                                         << glu::TessellationControlSource(specializeShader(m_context, getTessCtrlSource("layout(vertices=6) out").c_str()))
6918                                                                                                                                         << glu::TessellationEvaluationSource(specializeShader(m_context, getTessEvalSource(s_modes[ndx].layout).c_str())));
6919
6920                 m_testCtx.getLog() << program;
6921                 if (!program.isOk())
6922                         result.fail("failed to build program");
6923                 else
6924                         verifyStateProgramInteger(result, gl, program.getProgram(), GL_TESS_GEN_VERTEX_ORDER, s_modes[ndx].order, QUERY_PROGRAM_INTEGER);
6925         }
6926
6927         result.setTestContextResult(m_testCtx);
6928         return STOP;
6929 }
6930
6931 class TessGenPointModeQueryCase : public TessProgramQueryCase
6932 {
6933 public:
6934                                                 TessGenPointModeQueryCase       (Context& context, const char* name, const char* desc);
6935 private:
6936         IterateResult           iterate                                         (void);
6937 };
6938
6939 TessGenPointModeQueryCase::TessGenPointModeQueryCase (Context& context, const char* name, const char* desc)
6940         : TessProgramQueryCase(context, name, desc)
6941 {
6942 }
6943
6944 TessGenPointModeQueryCase::IterateResult TessGenPointModeQueryCase::iterate (void)
6945 {
6946         tcu::ResultCollector    result  (m_testCtx.getLog(), " // ERROR: ");
6947         glu::CallLogWrapper             gl              (m_context.getRenderContext().getFunctions(), m_testCtx.getLog());
6948
6949         static const struct
6950         {
6951                 const char* description;
6952                 const char* layout;
6953                 glw::GLenum mode;
6954         } s_modes[] =
6955         {
6956                 { "Default mode",       "layout(triangles) in",                 GL_FALSE        },
6957                 { "Point mode",         "layout(triangles, point_mode) in",             GL_TRUE         },
6958         };
6959
6960         checkTessellationSupport(m_context);
6961         gl.enableLogging(true);
6962
6963         for (int ndx = 0; ndx < DE_LENGTH_OF_ARRAY(s_modes); ++ndx)
6964         {
6965                 const tcu::ScopedLogSection     section(m_testCtx.getLog(), "Type", s_modes[ndx].description);
6966
6967                 glu::ShaderProgram program (m_context.getRenderContext(), glu::ProgramSources()
6968                                                                                                                                         << glu::VertexSource(specializeShader(m_context, getVertexSource().c_str()))
6969                                                                                                                                         << glu::FragmentSource(specializeShader(m_context, getFragmentSource().c_str()))
6970                                                                                                                                         << glu::TessellationControlSource(specializeShader(m_context, getTessCtrlSource("layout(vertices=6) out").c_str()))
6971                                                                                                                                         << glu::TessellationEvaluationSource(specializeShader(m_context, getTessEvalSource(s_modes[ndx].layout).c_str())));
6972
6973                 m_testCtx.getLog() << program;
6974                 if (!program.isOk())
6975                         result.fail("failed to build program");
6976                 else
6977                         verifyStateProgramInteger(result, gl, program.getProgram(), GL_TESS_GEN_POINT_MODE, s_modes[ndx].mode, QUERY_PROGRAM_INTEGER);
6978         }
6979
6980         result.setTestContextResult(m_testCtx);
6981         return STOP;
6982 }
6983
6984 class ReferencedByTessellationQueryCase : public TestCase
6985 {
6986 public:
6987                                         ReferencedByTessellationQueryCase       (Context& context, const char* name, const char* desc, bool isCtrlCase);
6988 private:
6989         void                    init                                                            (void);
6990         IterateResult   iterate                                                         (void);
6991
6992         std::string             getVertexSource                                         (void) const;
6993         std::string             getFragmentSource                                       (void) const;
6994         std::string             getTessCtrlSource                                       (void) const;
6995         std::string             getTessEvalSource                                       (void) const;
6996
6997         const bool              m_isCtrlCase;
6998 };
6999
7000 ReferencedByTessellationQueryCase::ReferencedByTessellationQueryCase (Context& context, const char* name, const char* desc, bool isCtrlCase)
7001         : TestCase              (context, name, desc)
7002         , m_isCtrlCase  (isCtrlCase)
7003 {
7004 }
7005
7006 void ReferencedByTessellationQueryCase::init (void)
7007 {
7008         checkTessellationSupport(m_context);
7009 }
7010
7011 ReferencedByTessellationQueryCase::IterateResult ReferencedByTessellationQueryCase::iterate (void)
7012 {
7013         tcu::ResultCollector    result  (m_testCtx.getLog(), " // ERROR: ");
7014         glu::CallLogWrapper             gl              (m_context.getRenderContext().getFunctions(), m_testCtx.getLog());
7015         glu::ShaderProgram              program (m_context.getRenderContext(), glu::ProgramSources()
7016                                                                                                                                         << glu::VertexSource(specializeShader(m_context, getVertexSource().c_str()))
7017                                                                                                                                         << glu::FragmentSource(specializeShader(m_context, getFragmentSource().c_str()))
7018                                                                                                                                         << glu::TessellationControlSource(specializeShader(m_context, getTessCtrlSource().c_str()))
7019                                                                                                                                         << glu::TessellationEvaluationSource(specializeShader(m_context, getTessEvalSource().c_str())));
7020
7021         gl.enableLogging(true);
7022
7023         m_testCtx.getLog() << program;
7024         if (!program.isOk())
7025                 result.fail("failed to build program");
7026         else
7027         {
7028                 const deUint32 props[1] = { (deUint32)((m_isCtrlCase) ? (GL_REFERENCED_BY_TESS_CONTROL_SHADER) : (GL_REFERENCED_BY_TESS_EVALUATION_SHADER)) };
7029
7030                 {
7031                         const tcu::ScopedLogSection section             (m_testCtx.getLog(), "UnreferencedUniform", "Unreferenced uniform u_unreferenced");
7032                         deUint32                                        resourcePos;
7033                         glw::GLsizei                            length          = 0;
7034                         glw::GLint                                      referenced      = 0;
7035
7036                         resourcePos = gl.glGetProgramResourceIndex(program.getProgram(), GL_UNIFORM, "u_unreferenced");
7037                         m_testCtx.getLog() << tcu::TestLog::Message << "u_unreferenced resource index: " << resourcePos << tcu::TestLog::EndMessage;
7038
7039                         if (resourcePos == GL_INVALID_INDEX)
7040                                 result.fail("resourcePos was GL_INVALID_INDEX");
7041                         else
7042                         {
7043                                 gl.glGetProgramResourceiv(program.getProgram(), GL_UNIFORM, resourcePos, 1, props, 1, &length, &referenced);
7044                                 m_testCtx.getLog()
7045                                         << tcu::TestLog::Message
7046                                         << "Query " << glu::getProgramResourcePropertyStr(props[0])
7047                                         << ", got " << length << " value(s), value[0] = " << glu::getBooleanStr(referenced)
7048                                         << tcu::TestLog::EndMessage;
7049
7050                                 GLS_COLLECT_GL_ERROR(result, gl.glGetError(), "query resource");
7051
7052                                 if (length == 0 || referenced != GL_FALSE)
7053                                         result.fail("expected GL_FALSE");
7054                         }
7055                 }
7056
7057                 {
7058                         const tcu::ScopedLogSection section             (m_testCtx.getLog(), "ReferencedUniform", "Referenced uniform u_referenced");
7059                         deUint32                                        resourcePos;
7060                         glw::GLsizei                            length          = 0;
7061                         glw::GLint                                      referenced      = 0;
7062
7063                         resourcePos = gl.glGetProgramResourceIndex(program.getProgram(), GL_UNIFORM, "u_referenced");
7064                         m_testCtx.getLog() << tcu::TestLog::Message << "u_referenced resource index: " << resourcePos << tcu::TestLog::EndMessage;
7065
7066                         if (resourcePos == GL_INVALID_INDEX)
7067                                 result.fail("resourcePos was GL_INVALID_INDEX");
7068                         else
7069                         {
7070                                 gl.glGetProgramResourceiv(program.getProgram(), GL_UNIFORM, resourcePos, 1, props, 1, &length, &referenced);
7071                                 m_testCtx.getLog()
7072                                         << tcu::TestLog::Message
7073                                         << "Query " << glu::getProgramResourcePropertyStr(props[0])
7074                                         << ", got " << length << " value(s), value[0] = " << glu::getBooleanStr(referenced)
7075                                         << tcu::TestLog::EndMessage;
7076
7077                                 GLU_EXPECT_NO_ERROR(gl.glGetError(), "query resource");
7078
7079                                 if (length == 0 || referenced != GL_TRUE)
7080                                         result.fail("expected GL_TRUE");
7081                         }
7082                 }
7083         }
7084
7085         result.setTestContextResult(m_testCtx);
7086         return STOP;
7087 }
7088
7089 std::string ReferencedByTessellationQueryCase::getVertexSource (void) const
7090 {
7091         return  "${GLSL_VERSION_DECL}\n"
7092                         "void main (void)\n"
7093                         "{\n"
7094                         "       gl_Position = vec4(float(gl_VertexID), float(gl_VertexID / 2), 0.0, 1.0);\n"
7095                         "}\n";
7096 }
7097
7098 std::string ReferencedByTessellationQueryCase::getFragmentSource (void) const
7099 {
7100         return  "${GLSL_VERSION_DECL}\n"
7101                         "layout (location = 0) out mediump vec4 o_color;\n"
7102                         "void main (void)\n"
7103                         "{\n"
7104                         "       o_color = vec4(0.0, 1.0, 0.0, 1.0);\n"
7105                         "}\n";
7106 }
7107
7108 std::string ReferencedByTessellationQueryCase::getTessCtrlSource (void) const
7109 {
7110         std::ostringstream buf;
7111         buf <<  "${GLSL_VERSION_DECL}\n"
7112                         "${TESSELLATION_SHADER_REQUIRE}\n"
7113                         "layout(vertices = 3) out;\n"
7114                         "uniform highp vec4 " << ((m_isCtrlCase) ? ("u_referenced") : ("u_unreferenced")) << ";\n"
7115                         "void main (void)\n"
7116                         "{\n"
7117                         "       vec4 offset = " << ((m_isCtrlCase) ? ("u_referenced") : ("u_unreferenced")) << ";\n"
7118                         "       gl_out[gl_InvocationID].gl_Position = gl_in[gl_InvocationID].gl_Position + offset;\n"
7119                         "       gl_TessLevelInner[0] = 2.8;\n"
7120                         "       gl_TessLevelInner[1] = 2.8;\n"
7121                         "       gl_TessLevelOuter[0] = 2.8;\n"
7122                         "       gl_TessLevelOuter[1] = 2.8;\n"
7123                         "       gl_TessLevelOuter[2] = 2.8;\n"
7124                         "       gl_TessLevelOuter[3] = 2.8;\n"
7125                         "}\n";
7126         return buf.str();
7127 }
7128
7129 std::string ReferencedByTessellationQueryCase::getTessEvalSource (void) const
7130 {
7131         std::ostringstream buf;
7132         buf <<  "${GLSL_VERSION_DECL}\n"
7133                         "${TESSELLATION_SHADER_REQUIRE}\n"
7134                         "layout(triangles) in;\n"
7135                         "uniform highp vec4 " << ((m_isCtrlCase) ? ("u_unreferenced") : ("u_referenced")) << ";\n"
7136                         "void main (void)\n"
7137                         "{\n"
7138                         "       vec4 offset = " << ((m_isCtrlCase) ? ("u_unreferenced") : ("u_referenced")) << ";\n"
7139                         "       gl_Position = gl_TessCoord.x * gl_in[0].gl_Position\n"
7140                         "                   + gl_TessCoord.y * gl_in[1].gl_Position\n"
7141                         "                   + gl_TessCoord.z * gl_in[2].gl_Position\n"
7142                         "                   + offset;\n"
7143                         "}\n";
7144
7145         return buf.str();
7146 }
7147
7148 class IsPerPatchQueryCase : public TestCase
7149 {
7150 public:
7151                                         IsPerPatchQueryCase             (Context& context, const char* name, const char* desc);
7152 private:
7153         void                    init                                    (void);
7154         IterateResult   iterate                                 (void);
7155 };
7156
7157 IsPerPatchQueryCase::IsPerPatchQueryCase (Context& context, const char* name, const char* desc)
7158         : TestCase(context, name, desc)
7159 {
7160 }
7161
7162 void IsPerPatchQueryCase::init (void)
7163 {
7164         checkTessellationSupport(m_context);
7165 }
7166
7167 IsPerPatchQueryCase::IterateResult IsPerPatchQueryCase::iterate (void)
7168 {
7169         static const char* const s_controlSource =      "${GLSL_VERSION_DECL}\n"
7170                                                                                                 "${TESSELLATION_SHADER_REQUIRE}\n"
7171                                                                                                 "layout(vertices = 3) out;\n"
7172                                                                                                 "patch out highp vec4 v_perPatch;\n"
7173                                                                                                 "out highp vec4 v_perVertex[];\n"
7174                                                                                                 "void main (void)\n"
7175                                                                                                 "{\n"
7176                                                                                                 "       gl_out[gl_InvocationID].gl_Position = gl_in[gl_InvocationID].gl_Position;\n"
7177                                                                                                 "       v_perPatch = gl_in[0].gl_Position;\n"
7178                                                                                                 "       v_perVertex[gl_InvocationID] = -gl_in[gl_InvocationID].gl_Position;\n"
7179                                                                                                 "       gl_TessLevelInner[0] = 2.8;\n"
7180                                                                                                 "       gl_TessLevelInner[1] = 2.8;\n"
7181                                                                                                 "       gl_TessLevelOuter[0] = 2.8;\n"
7182                                                                                                 "       gl_TessLevelOuter[1] = 2.8;\n"
7183                                                                                                 "       gl_TessLevelOuter[2] = 2.8;\n"
7184                                                                                                 "       gl_TessLevelOuter[3] = 2.8;\n"
7185                                                                                                 "}\n";
7186         tcu::ResultCollector    result  (m_testCtx.getLog(), " // ERROR: ");
7187         glu::CallLogWrapper             gl              (m_context.getRenderContext().getFunctions(), m_testCtx.getLog());
7188         glu::ShaderProgram              program (m_context.getRenderContext(), glu::ProgramSources()
7189                                                                                                                                         << glu::TessellationControlSource(specializeShader(m_context, s_controlSource))
7190                                                                                                                                         << glu::ProgramSeparable(true));
7191
7192         gl.enableLogging(true);
7193
7194         m_testCtx.getLog() << program;
7195         if (!program.isOk())
7196                 result.fail("failed to build program");
7197         else
7198         {
7199                 const deUint32 props[1] = { GL_IS_PER_PATCH };
7200
7201                 {
7202                         const tcu::ScopedLogSection section             (m_testCtx.getLog(), "PerPatchOutput", "Per patch v_perPatch");
7203                         deUint32                                        resourcePos;
7204                         glw::GLsizei                            length          = 0;
7205                         glw::GLint                                      referenced      = 0;
7206
7207                         resourcePos = gl.glGetProgramResourceIndex(program.getProgram(), GL_PROGRAM_OUTPUT, "v_perPatch");
7208                         m_testCtx.getLog() << tcu::TestLog::Message << "v_perPatch resource index: " << resourcePos << tcu::TestLog::EndMessage;
7209
7210                         if (resourcePos == GL_INVALID_INDEX)
7211                                 result.fail("resourcePos was GL_INVALID_INDEX");
7212                         else
7213                         {
7214                                 gl.glGetProgramResourceiv(program.getProgram(), GL_PROGRAM_OUTPUT, resourcePos, 1, props, 1, &length, &referenced);
7215                                 m_testCtx.getLog()
7216                                         << tcu::TestLog::Message
7217                                         << "Query " << glu::getProgramResourcePropertyStr(props[0])
7218                                         << ", got " << length << " value(s), value[0] = " << glu::getBooleanStr(referenced)
7219                                         << tcu::TestLog::EndMessage;
7220
7221                                 GLS_COLLECT_GL_ERROR(result, gl.glGetError(), "query resource");
7222
7223                                 if (length == 0 || referenced != GL_TRUE)
7224                                         result.fail("expected GL_TRUE");
7225                         }
7226                 }
7227
7228                 {
7229                         const tcu::ScopedLogSection section             (m_testCtx.getLog(), "PerVertexhOutput", "Per vertex v_perVertex");
7230                         deUint32                                        resourcePos;
7231                         glw::GLsizei                            length          = 0;
7232                         glw::GLint                                      referenced      = 0;
7233
7234                         resourcePos = gl.glGetProgramResourceIndex(program.getProgram(), GL_PROGRAM_OUTPUT, "v_perVertex");
7235                         m_testCtx.getLog() << tcu::TestLog::Message << "v_perVertex resource index: " << resourcePos << tcu::TestLog::EndMessage;
7236
7237                         if (resourcePos == GL_INVALID_INDEX)
7238                                 result.fail("resourcePos was GL_INVALID_INDEX");
7239                         else
7240                         {
7241                                 gl.glGetProgramResourceiv(program.getProgram(), GL_PROGRAM_OUTPUT, resourcePos, 1, props, 1, &length, &referenced);
7242                                 m_testCtx.getLog()
7243                                         << tcu::TestLog::Message
7244                                         << "Query " << glu::getProgramResourcePropertyStr(props[0])
7245                                         << ", got " << length << " value(s), value[0] = " << glu::getBooleanStr(referenced)
7246                                         << tcu::TestLog::EndMessage;
7247
7248                                 GLU_EXPECT_NO_ERROR(gl.glGetError(), "query resource");
7249
7250                                 if (length == 0 || referenced != GL_FALSE)
7251                                         result.fail("expected GL_FALSE");
7252                         }
7253                 }
7254         }
7255
7256         result.setTestContextResult(m_testCtx);
7257         return STOP;
7258 }
7259
7260 } // anonymous
7261
7262 TessellationTests::TessellationTests (Context& context)
7263         : TestCaseGroup(context, "tessellation", "Tessellation Tests")
7264 {
7265 }
7266
7267 TessellationTests::~TessellationTests (void)
7268 {
7269 }
7270
7271 void TessellationTests::init (void)
7272 {
7273         {
7274                 tcu::TestCaseGroup* const queryGroup = new tcu::TestCaseGroup(m_testCtx, "state_query", "Query tests");
7275                 addChild(queryGroup);
7276
7277                 // new limits
7278                 queryGroup->addChild(new LimitQueryCase(m_context, "max_patch_vertices",                                                                "Test MAX_PATCH_VERTICES",                                                              GL_MAX_PATCH_VERTICES,                                                  32));
7279                 queryGroup->addChild(new LimitQueryCase(m_context, "max_tess_gen_level",                                                                "Test MAX_TESS_GEN_LEVEL",                                                              GL_MAX_TESS_GEN_LEVEL,                                                  64));
7280                 queryGroup->addChild(new LimitQueryCase(m_context, "max_tess_control_uniform_components",                               "Test MAX_TESS_CONTROL_UNIFORM_COMPONENTS",                             GL_MAX_TESS_CONTROL_UNIFORM_COMPONENTS,                 1024));
7281                 queryGroup->addChild(new LimitQueryCase(m_context, "max_tess_evaluation_uniform_components",                    "Test MAX_TESS_EVALUATION_UNIFORM_COMPONENTS",                  GL_MAX_TESS_EVALUATION_UNIFORM_COMPONENTS,              1024));
7282                 queryGroup->addChild(new LimitQueryCase(m_context, "max_tess_control_texture_image_units",                              "Test MAX_TESS_CONTROL_TEXTURE_IMAGE_UNITS",                    GL_MAX_TESS_CONTROL_TEXTURE_IMAGE_UNITS,                16));
7283                 queryGroup->addChild(new LimitQueryCase(m_context, "max_tess_evaluation_texture_image_units",                   "Test MAX_TESS_EVALUATION_TEXTURE_IMAGE_UNITS",                 GL_MAX_TESS_EVALUATION_TEXTURE_IMAGE_UNITS,             16));
7284                 queryGroup->addChild(new LimitQueryCase(m_context, "max_tess_control_output_components",                                "Test MAX_TESS_CONTROL_OUTPUT_COMPONENTS",                              GL_MAX_TESS_CONTROL_OUTPUT_COMPONENTS,                  64));
7285                 queryGroup->addChild(new LimitQueryCase(m_context, "max_tess_patch_components",                                                 "Test MAX_TESS_PATCH_COMPONENTS",                                               GL_MAX_TESS_PATCH_COMPONENTS,                                   120));
7286                 queryGroup->addChild(new LimitQueryCase(m_context, "max_tess_control_total_output_components",                  "Test MAX_TESS_CONTROL_TOTAL_OUTPUT_COMPONENTS",                GL_MAX_TESS_CONTROL_TOTAL_OUTPUT_COMPONENTS,    2048));
7287                 queryGroup->addChild(new LimitQueryCase(m_context, "max_tess_evaluation_output_components",                             "Test MAX_TESS_EVALUATION_OUTPUT_COMPONENTS",                   GL_MAX_TESS_EVALUATION_OUTPUT_COMPONENTS,               64));
7288                 queryGroup->addChild(new LimitQueryCase(m_context, "max_tess_control_uniform_blocks",                                   "Test MAX_TESS_CONTROL_UNIFORM_BLOCKS",                                 GL_MAX_TESS_CONTROL_UNIFORM_BLOCKS,                             12));
7289                 queryGroup->addChild(new LimitQueryCase(m_context, "max_tess_evaluation_uniform_blocks",                                "Test MAX_TESS_EVALUATION_UNIFORM_BLOCKS",                              GL_MAX_TESS_EVALUATION_UNIFORM_BLOCKS,                  12));
7290                 queryGroup->addChild(new LimitQueryCase(m_context, "max_tess_control_input_components",                                 "Test MAX_TESS_CONTROL_INPUT_COMPONENTS",                               GL_MAX_TESS_CONTROL_INPUT_COMPONENTS,                   64));
7291                 queryGroup->addChild(new LimitQueryCase(m_context, "max_tess_evaluation_input_components",                              "Test MAX_TESS_EVALUATION_INPUT_COMPONENTS",                    GL_MAX_TESS_EVALUATION_INPUT_COMPONENTS,                64));
7292                 queryGroup->addChild(new LimitQueryCase(m_context, "max_tess_control_atomic_counter_buffers",                   "Test MAX_TESS_CONTROL_ATOMIC_COUNTER_BUFFERS",                 GL_MAX_TESS_CONTROL_ATOMIC_COUNTER_BUFFERS,             0));
7293                 queryGroup->addChild(new LimitQueryCase(m_context, "max_tess_evaluation_atomic_counter_buffers",                "Test MAX_TESS_EVALUATION_ATOMIC_COUNTER_BUFFERS",              GL_MAX_TESS_EVALUATION_ATOMIC_COUNTER_BUFFERS,  0));
7294                 queryGroup->addChild(new LimitQueryCase(m_context, "max_tess_control_atomic_counters",                                  "Test MAX_TESS_CONTROL_ATOMIC_COUNTERS",                                GL_MAX_TESS_CONTROL_ATOMIC_COUNTERS,                    0));
7295                 queryGroup->addChild(new LimitQueryCase(m_context, "max_tess_evaluation_atomic_counters",                               "Test MAX_TESS_EVALUATION_ATOMIC_COUNTERS",                             GL_MAX_TESS_EVALUATION_ATOMIC_COUNTERS,                 0));
7296                 queryGroup->addChild(new LimitQueryCase(m_context, "max_tess_control_image_uniforms",                                   "Test MAX_TESS_CONTROL_IMAGE_UNIFORMS",                                 GL_MAX_TESS_CONTROL_IMAGE_UNIFORMS,                             0));
7297                 queryGroup->addChild(new LimitQueryCase(m_context, "max_tess_evaluation_image_uniforms",                                "Test MAX_TESS_EVALUATION_IMAGE_UNIFORMS",                              GL_MAX_TESS_EVALUATION_IMAGE_UNIFORMS,                  0));
7298                 queryGroup->addChild(new LimitQueryCase(m_context, "max_tess_control_shader_storage_blocks",                    "Test MAX_TESS_CONTROL_SHADER_STORAGE_BLOCKS",                  GL_MAX_TESS_CONTROL_SHADER_STORAGE_BLOCKS,              0));
7299                 queryGroup->addChild(new LimitQueryCase(m_context, "max_tess_evaluation_shader_storage_blocks",                 "Test MAX_TESS_EVALUATION_SHADER_STORAGE_BLOCKS",               GL_MAX_TESS_EVALUATION_SHADER_STORAGE_BLOCKS,   0));
7300
7301                 // modified limits
7302                 queryGroup->addChild(new LimitQueryCase(m_context, "max_uniform_buffer_bindings",                                               "Test MAX_UNIFORM_BUFFER_BINDINGS",                                             GL_MAX_UNIFORM_BUFFER_BINDINGS,                                 72));
7303                 queryGroup->addChild(new LimitQueryCase(m_context, "max_combined_uniform_blocks",                                               "Test MAX_COMBINED_UNIFORM_BLOCKS",                                             GL_MAX_COMBINED_UNIFORM_BLOCKS,                                 60));
7304                 queryGroup->addChild(new LimitQueryCase(m_context, "max_combined_texture_image_units",                                  "Test MAX_COMBINED_TEXTURE_IMAGE_UNITS",                                GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS,                    96));
7305
7306                 // combined limits
7307                 queryGroup->addChild(new CombinedUniformLimitCase(m_context, "max_combined_tess_control_uniform_components",            "Test MAX_COMBINED_TESS_CONTROL_UNIFORM_COMPONENTS",    GL_MAX_COMBINED_TESS_CONTROL_UNIFORM_COMPONENTS,                GL_MAX_TESS_CONTROL_UNIFORM_BLOCKS,             GL_MAX_TESS_CONTROL_UNIFORM_COMPONENTS));
7308                 queryGroup->addChild(new CombinedUniformLimitCase(m_context, "max_combined_tess_evaluation_uniform_components",         "Test MAX_COMBINED_TESS_EVALUATION_UNIFORM_COMPONENTS", GL_MAX_COMBINED_TESS_EVALUATION_UNIFORM_COMPONENTS,             GL_MAX_TESS_EVALUATION_UNIFORM_BLOCKS,  GL_MAX_TESS_EVALUATION_UNIFORM_COMPONENTS));
7309
7310                 // features
7311                 queryGroup->addChild(new PrimitiveRestartForPatchesSupportedCase(m_context, "primitive_restart_for_patches_supported", "Test PRIMITIVE_RESTART_FOR_PATCHES_SUPPORTED"));
7312
7313                 // states
7314                 queryGroup->addChild(new PatchVerticesStateCase(m_context, "patch_vertices", "Test PATCH_VERTICES"));
7315
7316                 // program states
7317                 queryGroup->addChild(new TessControlOutputVerticesCase  (m_context, "tess_control_output_vertices",     "Test TESS_CONTROL_OUTPUT_VERTICES"));
7318                 queryGroup->addChild(new TessGenModeQueryCase                   (m_context, "tess_gen_mode",                            "Test TESS_GEN_MODE"));
7319                 queryGroup->addChild(new TessGenSpacingQueryCase                (m_context, "tess_gen_spacing",                         "Test TESS_GEN_SPACING"));
7320                 queryGroup->addChild(new TessGenVertexOrderQueryCase    (m_context, "tess_gen_vertex_order",            "Test TESS_GEN_VERTEX_ORDER"));
7321                 queryGroup->addChild(new TessGenPointModeQueryCase              (m_context, "tess_gen_point_mode",                      "Test TESS_GEN_POINT_MODE"));
7322
7323                 // resource queries
7324                 queryGroup->addChild(new ReferencedByTessellationQueryCase      (m_context, "referenced_by_tess_control_shader",        "Test REFERENCED_BY_TESS_CONTROL_SHADER",               true));
7325                 queryGroup->addChild(new ReferencedByTessellationQueryCase      (m_context, "referenced_by_tess_evaluation_shader",     "Test REFERENCED_BY_TESS_EVALUATION_SHADER",    false));
7326                 queryGroup->addChild(new IsPerPatchQueryCase                            (m_context, "is_per_patch",                                                     "Test IS_PER_PATCH"));
7327         }
7328
7329         {
7330                 TestCaseGroup* const tessCoordGroup = new TestCaseGroup(m_context, "tesscoord", "Get tessellation coordinates with transform feedback and validate them");
7331                 addChild(tessCoordGroup);
7332
7333                 for (int primitiveTypeI = 0; primitiveTypeI < TESSPRIMITIVETYPE_LAST; primitiveTypeI++)
7334                 {
7335                         const TessPrimitiveType primitiveType = (TessPrimitiveType)primitiveTypeI;
7336
7337                         for (int spacingI = 0; spacingI < SPACINGMODE_LAST; spacingI++)
7338                                 tessCoordGroup->addChild(new TessCoordCase(m_context,
7339                                                                                                                    (string() + getTessPrimitiveTypeShaderName(primitiveType) + "_" + getSpacingModeShaderName((SpacingMode)spacingI)).c_str(), "",
7340                                                                                                                    primitiveType, (SpacingMode)spacingI));
7341                 }
7342         }
7343
7344         {
7345                 TestCaseGroup* const windingGroup = new TestCaseGroup(m_context, "winding", "Test the cw and ccw input layout qualifiers");
7346                 addChild(windingGroup);
7347
7348                 for (int primitiveTypeI = 0; primitiveTypeI < TESSPRIMITIVETYPE_LAST; primitiveTypeI++)
7349                 {
7350                         const TessPrimitiveType primitiveType = (TessPrimitiveType)primitiveTypeI;
7351                         if (primitiveType == TESSPRIMITIVETYPE_ISOLINES)
7352                                 continue;
7353
7354                         for (int windingI = 0; windingI < WINDING_LAST; windingI++)
7355                         {
7356                                 const Winding winding = (Winding)windingI;
7357                                 windingGroup->addChild(new WindingCase(m_context, (string() + getTessPrimitiveTypeShaderName(primitiveType) + "_" + getWindingShaderName(winding)).c_str(), "", primitiveType, winding));
7358                         }
7359                 }
7360         }
7361
7362         {
7363                 TestCaseGroup* const shaderInputOutputGroup = new TestCaseGroup(m_context, "shader_input_output", "Test tessellation control and evaluation shader inputs and outputs");
7364                 addChild(shaderInputOutputGroup);
7365
7366                 {
7367                         static const struct
7368                         {
7369                                 int inPatchSize;
7370                                 int outPatchSize;
7371                         } patchVertexCountCases[] =
7372                         {
7373                                 {  5, 10 },
7374                                 { 10,  5 }
7375                         };
7376
7377                         for (int caseNdx = 0; caseNdx < DE_LENGTH_OF_ARRAY(patchVertexCountCases); caseNdx++)
7378                         {
7379                                 const int inSize        = patchVertexCountCases[caseNdx].inPatchSize;
7380                                 const int outSize       = patchVertexCountCases[caseNdx].outPatchSize;
7381
7382                                 const string caseName = "patch_vertices_" + de::toString(inSize) + "_in_" + de::toString(outSize) + "_out";
7383
7384                                 shaderInputOutputGroup->addChild(new PatchVertexCountCase(m_context, caseName.c_str(), "Test input and output patch vertex counts", inSize, outSize,
7385                                                                                                                                                   ("data/tessellation/" + caseName + "_ref.png").c_str()));
7386                         }
7387                 }
7388
7389                 for (int caseTypeI = 0; caseTypeI < PerPatchDataCase::CASETYPE_LAST; caseTypeI++)
7390                 {
7391                         const PerPatchDataCase::CaseType        caseType        = (PerPatchDataCase::CaseType)caseTypeI;
7392                         const char* const                                       caseName        = PerPatchDataCase::getCaseTypeName(caseType);
7393
7394                         shaderInputOutputGroup->addChild(new PerPatchDataCase(m_context, caseName, PerPatchDataCase::getCaseTypeDescription(caseType), caseType,
7395                                                                                                                                   PerPatchDataCase::caseTypeUsesRefImageFromFile(caseType) ? (string() + "data/tessellation/" + caseName + "_ref.png").c_str() : DE_NULL));
7396                 }
7397
7398                 for (int caseTypeI = 0; caseTypeI < GLPositionCase::CASETYPE_LAST; caseTypeI++)
7399                 {
7400                         const GLPositionCase::CaseType  caseType        = (GLPositionCase::CaseType)caseTypeI;
7401                         const char* const                               caseName        = GLPositionCase::getCaseTypeName(caseType);
7402
7403                         shaderInputOutputGroup->addChild(new GLPositionCase(m_context, caseName, "", caseType, "data/tessellation/gl_position_ref.png"));
7404                 }
7405
7406                 shaderInputOutputGroup->addChild(new BarrierCase(m_context, "barrier", "Basic barrier usage", "data/tessellation/barrier_ref.png"));
7407         }
7408
7409         {
7410                 TestCaseGroup* const miscDrawGroup = new TestCaseGroup(m_context, "misc_draw", "Miscellaneous draw-result-verifying cases");
7411                 addChild(miscDrawGroup);
7412
7413                 for (int primitiveTypeI = 0; primitiveTypeI < TESSPRIMITIVETYPE_LAST; primitiveTypeI++)
7414                 {
7415                         const TessPrimitiveType primitiveType = (TessPrimitiveType)primitiveTypeI;
7416                         if (primitiveType == TESSPRIMITIVETYPE_ISOLINES)
7417                                 continue;
7418
7419                         const char* const primTypeName = getTessPrimitiveTypeShaderName(primitiveType);
7420
7421                         for (int spacingI = 0; spacingI < SPACINGMODE_LAST; spacingI++)
7422                         {
7423                                 const string caseName = string() + "fill_cover_" + primTypeName + "_" + getSpacingModeShaderName((SpacingMode)spacingI);
7424
7425                                 miscDrawGroup->addChild(new BasicTriangleFillCoverCase(m_context,
7426                                                                                                                                            caseName.c_str(), "Check that there are no obvious gaps in the triangle-filled area of a tessellated shape",
7427                                                                                                                                            primitiveType, (SpacingMode)spacingI,
7428                                                                                                                                            ("data/tessellation/" + caseName + "_ref").c_str()));
7429                         }
7430                 }
7431
7432                 for (int primitiveTypeI = 0; primitiveTypeI < TESSPRIMITIVETYPE_LAST; primitiveTypeI++)
7433                 {
7434                         const TessPrimitiveType primitiveType = (TessPrimitiveType)primitiveTypeI;
7435                         if (primitiveType == TESSPRIMITIVETYPE_ISOLINES)
7436                                 continue;
7437
7438                         const char* const primTypeName = getTessPrimitiveTypeShaderName(primitiveType);
7439
7440                         for (int spacingI = 0; spacingI < SPACINGMODE_LAST; spacingI++)
7441                         {
7442                                 const string caseName = string() + "fill_overlap_" + primTypeName + "_" + getSpacingModeShaderName((SpacingMode)spacingI);
7443
7444                                 miscDrawGroup->addChild(new BasicTriangleFillNonOverlapCase(m_context,
7445                                                                                                                                                         caseName.c_str(), "Check that there are no obvious triangle overlaps in the triangle-filled area of a tessellated shape",
7446                                                                                                                                                         primitiveType, (SpacingMode)spacingI,
7447                                                                                                                                                         ("data/tessellation/" + caseName + "_ref").c_str()));
7448                         }
7449                 }
7450
7451                 for (int spacingI = 0; spacingI < SPACINGMODE_LAST; spacingI++)
7452                 {
7453                         const string caseName = string() + "isolines_" + getSpacingModeShaderName((SpacingMode)spacingI);
7454
7455                         miscDrawGroup->addChild(new IsolinesRenderCase(m_context,
7456                                                                                                                    caseName.c_str(), "Basic isolines render test",
7457                                                                                                                    (SpacingMode)spacingI,
7458                                                                                                                    ("data/tessellation/" + caseName + "_ref").c_str()));
7459                 }
7460         }
7461
7462         {
7463                 TestCaseGroup* const commonEdgeGroup = new TestCaseGroup(m_context, "common_edge", "Draw multiple adjacent shapes and check that no cracks appear between them");
7464                 addChild(commonEdgeGroup);
7465
7466                 for (int caseTypeI = 0; caseTypeI < CommonEdgeCase::CASETYPE_LAST; caseTypeI++)
7467                 {
7468                         for (int primitiveTypeI = 0; primitiveTypeI < TESSPRIMITIVETYPE_LAST; primitiveTypeI++)
7469                         {
7470                                 const CommonEdgeCase::CaseType  caseType                = (CommonEdgeCase::CaseType)caseTypeI;
7471                                 const TessPrimitiveType                 primitiveType   = (TessPrimitiveType)primitiveTypeI;
7472                                 if (primitiveType == TESSPRIMITIVETYPE_ISOLINES)
7473                                                 continue;
7474
7475                                 for (int spacingI = 0; spacingI < SPACINGMODE_LAST; spacingI++)
7476                                 {
7477                                         const SpacingMode       spacing         = (SpacingMode)spacingI;
7478                                         const string            caseName        = (string() + getTessPrimitiveTypeShaderName(primitiveType)
7479                                                                                                                                 + "_" + getSpacingModeShaderName(spacing)
7480                                                                                                                                 + (caseType == CommonEdgeCase::CASETYPE_BASIC           ? ""
7481                                                                                                                                  : caseType == CommonEdgeCase::CASETYPE_PRECISE         ? "_precise"
7482                                                                                                                                  : DE_NULL));
7483
7484                                         commonEdgeGroup->addChild(new CommonEdgeCase(m_context, caseName.c_str(), "", primitiveType, spacing, caseType));
7485                                 }
7486                         }
7487                 }
7488         }
7489
7490         {
7491                 TestCaseGroup* const fractionalSpacingModeGroup = new TestCaseGroup(m_context, "fractional_spacing", "Test fractional spacing modes");
7492                 addChild(fractionalSpacingModeGroup);
7493
7494                 fractionalSpacingModeGroup->addChild(new FractionalSpacingModeCase(m_context, "odd",    "", SPACINGMODE_FRACTIONAL_ODD));
7495                 fractionalSpacingModeGroup->addChild(new FractionalSpacingModeCase(m_context, "even",   "", SPACINGMODE_FRACTIONAL_EVEN));
7496         }
7497
7498         {
7499                 TestCaseGroup* const primitiveDiscardGroup = new TestCaseGroup(m_context, "primitive_discard", "Test primitive discard with relevant outer tessellation level <= 0.0");
7500                 addChild(primitiveDiscardGroup);
7501
7502                 for (int primitiveTypeI = 0; primitiveTypeI < TESSPRIMITIVETYPE_LAST; primitiveTypeI++)
7503                 {
7504                         for (int spacingI = 0; spacingI < SPACINGMODE_LAST; spacingI++)
7505                         {
7506                                 for (int windingI = 0; windingI < WINDING_LAST; windingI++)
7507                                 {
7508                                         for (int usePointModeI = 0; usePointModeI <= 1; usePointModeI++)
7509                                         {
7510                                                 const TessPrimitiveType         primitiveType   = (TessPrimitiveType)primitiveTypeI;
7511                                                 const SpacingMode                       spacing                 = (SpacingMode)spacingI;
7512                                                 const Winding                           winding                 = (Winding)windingI;
7513                                                 const bool                                      usePointMode    = usePointModeI != 0;
7514
7515                                                 primitiveDiscardGroup->addChild(new PrimitiveDiscardCase(m_context, (string() + getTessPrimitiveTypeShaderName(primitiveType)
7516                                                                                                                                                                                                           + "_" + getSpacingModeShaderName(spacing)
7517                                                                                                                                                                                                           + "_" + getWindingShaderName(winding)
7518                                                                                                                                                                                                           + (usePointMode ? "_point_mode" : "")).c_str(), "",
7519                                                                                                                                                                  primitiveType, spacing, winding, usePointMode));
7520                                         }
7521                                 }
7522                         }
7523                 }
7524         }
7525
7526         {
7527                 TestCaseGroup* const invarianceGroup                                                    = new TestCaseGroup(m_context, "invariance",                                            "Test tessellation invariance rules");
7528
7529                 TestCaseGroup* const invariantPrimitiveSetGroup                                 = new TestCaseGroup(m_context, "primitive_set",                                         "Test invariance rule #1");
7530                 TestCaseGroup* const invariantOuterEdgeGroup                                    = new TestCaseGroup(m_context, "outer_edge_division",                           "Test invariance rule #2");
7531                 TestCaseGroup* const symmetricOuterEdgeGroup                                    = new TestCaseGroup(m_context, "outer_edge_symmetry",                           "Test invariance rule #3");
7532                 TestCaseGroup* const outerEdgeVertexSetIndexIndependenceGroup   = new TestCaseGroup(m_context, "outer_edge_index_independence",         "Test invariance rule #4");
7533                 TestCaseGroup* const invariantTriangleSetGroup                                  = new TestCaseGroup(m_context, "triangle_set",                                          "Test invariance rule #5");
7534                 TestCaseGroup* const invariantInnerTriangleSetGroup                             = new TestCaseGroup(m_context, "inner_triangle_set",                            "Test invariance rule #6");
7535                 TestCaseGroup* const invariantOuterTriangleSetGroup                             = new TestCaseGroup(m_context, "outer_triangle_set",                            "Test invariance rule #7");
7536                 TestCaseGroup* const tessCoordComponentRangeGroup                               = new TestCaseGroup(m_context, "tess_coord_component_range",            "Test invariance rule #8, first part");
7537                 TestCaseGroup* const oneMinusTessCoordComponentGroup                    = new TestCaseGroup(m_context, "one_minus_tess_coord_component",        "Test invariance rule #8, second part");
7538
7539                 addChild(invarianceGroup);
7540                 invarianceGroup->addChild(invariantPrimitiveSetGroup);
7541                 invarianceGroup->addChild(invariantOuterEdgeGroup);
7542                 invarianceGroup->addChild(symmetricOuterEdgeGroup);
7543                 invarianceGroup->addChild(outerEdgeVertexSetIndexIndependenceGroup);
7544                 invarianceGroup->addChild(invariantTriangleSetGroup);
7545                 invarianceGroup->addChild(invariantInnerTriangleSetGroup);
7546                 invarianceGroup->addChild(invariantOuterTriangleSetGroup);
7547                 invarianceGroup->addChild(tessCoordComponentRangeGroup);
7548                 invarianceGroup->addChild(oneMinusTessCoordComponentGroup);
7549
7550                 for (int primitiveTypeI = 0; primitiveTypeI < TESSPRIMITIVETYPE_LAST; primitiveTypeI++)
7551                 {
7552                         const TessPrimitiveType         primitiveType   = (TessPrimitiveType)primitiveTypeI;
7553                         const string                            primName                = getTessPrimitiveTypeShaderName(primitiveType);
7554                         const bool                                      triOrQuad               = primitiveType == TESSPRIMITIVETYPE_TRIANGLES || primitiveType == TESSPRIMITIVETYPE_QUADS;
7555
7556                         for (int spacingI = 0; spacingI < SPACINGMODE_LAST; spacingI++)
7557                         {
7558                                 const SpacingMode       spacing                 = (SpacingMode)spacingI;
7559                                 const string            primSpacName    = primName + "_" + getSpacingModeShaderName(spacing);
7560
7561                                 if (triOrQuad)
7562                                 {
7563                                         invariantOuterEdgeGroup->addChild               (new InvariantOuterEdgeCase                     (m_context, primSpacName.c_str(), "", primitiveType, spacing));
7564                                         invariantTriangleSetGroup->addChild             (new InvariantTriangleSetCase           (m_context, primSpacName.c_str(), "", primitiveType, spacing));
7565                                         invariantInnerTriangleSetGroup->addChild(new InvariantInnerTriangleSetCase      (m_context, primSpacName.c_str(), "", primitiveType, spacing));
7566                                         invariantOuterTriangleSetGroup->addChild(new InvariantOuterTriangleSetCase      (m_context, primSpacName.c_str(), "", primitiveType, spacing));
7567                                 }
7568
7569                                 for (int windingI = 0; windingI < WINDING_LAST; windingI++)
7570                                 {
7571                                         const Winding   winding                         = (Winding)windingI;
7572                                         const string    primSpacWindName        = primSpacName + "_" + getWindingShaderName(winding);
7573
7574                                         for (int usePointModeI = 0; usePointModeI <= 1; usePointModeI++)
7575                                         {
7576                                                 const bool              usePointMode                    = usePointModeI != 0;
7577                                                 const string    primSpacWindPointName   = primSpacWindName + (usePointMode ? "_point_mode" : "");
7578
7579                                                 invariantPrimitiveSetGroup->addChild            (new InvariantPrimitiveSetCase                  (m_context, primSpacWindPointName.c_str(), "", primitiveType, spacing, winding, usePointMode));
7580                                                 symmetricOuterEdgeGroup->addChild                       (new SymmetricOuterEdgeCase                             (m_context, primSpacWindPointName.c_str(), "", primitiveType, spacing, winding, usePointMode));
7581                                                 tessCoordComponentRangeGroup->addChild          (new TessCoordComponentRangeCase                (m_context, primSpacWindPointName.c_str(), "", primitiveType, spacing, winding, usePointMode));
7582                                                 oneMinusTessCoordComponentGroup->addChild       (new OneMinusTessCoordComponentCase             (m_context, primSpacWindPointName.c_str(), "", primitiveType, spacing, winding, usePointMode));
7583
7584                                                 if (triOrQuad)
7585                                                         outerEdgeVertexSetIndexIndependenceGroup->addChild(new OuterEdgeVertexSetIndexIndependenceCase(m_context, primSpacWindPointName.c_str(), "",
7586                                                                                                                                                                                                                                                    primitiveType, spacing, winding, usePointMode));
7587                                         }
7588                                 }
7589                         }
7590                 }
7591         }
7592
7593         {
7594                 static const struct
7595                 {
7596                         const char*                                     name;
7597                         const char*                                     description;
7598                         UserDefinedIOCase::IOType       ioType;
7599                 } ioCases[] =
7600                 {
7601                         { "per_patch",                                  "Per-patch TCS outputs",                                        UserDefinedIOCase::IO_TYPE_PER_PATCH                            },
7602                         { "per_patch_array",                    "Per-patch array TCS outputs",                          UserDefinedIOCase::IO_TYPE_PER_PATCH_ARRAY                      },
7603                         { "per_patch_block",                    "Per-patch TCS outputs in IO block",            UserDefinedIOCase::IO_TYPE_PER_PATCH_BLOCK                      },
7604                         { "per_patch_block_array",              "Per-patch TCS outputs in IO block array",      UserDefinedIOCase::IO_TYPE_PER_PATCH_BLOCK_ARRAY        },
7605                         { "per_vertex",                                 "Per-vertex TCS outputs",                                       UserDefinedIOCase::IO_TYPE_PER_VERTEX                           },
7606                         { "per_vertex_block",                   "Per-vertex TCS outputs in IO block",           UserDefinedIOCase::IO_TYPE_PER_VERTEX_BLOCK                     },
7607                 };
7608
7609                 TestCaseGroup* const userDefinedIOGroup = new TestCaseGroup(m_context, "user_defined_io", "Test non-built-in per-patch and per-vertex inputs and outputs");
7610                 addChild(userDefinedIOGroup);
7611
7612                 for (int ndx = 0; ndx < DE_LENGTH_OF_ARRAY(ioCases); ++ndx)
7613                 {
7614                         TestCaseGroup* const ioTypeGroup = new TestCaseGroup(m_context, ioCases[ndx].name, ioCases[ndx].description);
7615                         userDefinedIOGroup->addChild(ioTypeGroup);
7616
7617                         for (int vertexArraySizeI = 0; vertexArraySizeI < UserDefinedIOCase::VERTEX_IO_ARRAY_SIZE_LAST; vertexArraySizeI++)
7618                         {
7619                                 const UserDefinedIOCase::VertexIOArraySize      vertexArraySize                 = (UserDefinedIOCase::VertexIOArraySize)vertexArraySizeI;
7620                                 TestCaseGroup* const                                            vertexArraySizeGroup    = new TestCaseGroup(m_context,
7621                                                                                                                                                                                                                 vertexArraySizeI == UserDefinedIOCase::VERTEX_IO_ARRAY_SIZE_IMPLICIT
7622                                                                                                                                                                                                                         ? "vertex_io_array_size_implicit"
7623                                                                                                                                                                                                           : vertexArraySizeI == UserDefinedIOCase::VERTEX_IO_ARRAY_SIZE_EXPLICIT_SHADER_BUILTIN
7624                                                                                                                                                                                                                         ? "vertex_io_array_size_shader_builtin"
7625                                                                                                                                                                                                           : vertexArraySizeI == UserDefinedIOCase::VERTEX_IO_ARRAY_SIZE_EXPLICIT_QUERY
7626                                                                                                                                                                                                                         ? "vertex_io_array_size_query"
7627                                                                                                                                                                                                           : DE_NULL,
7628                                                                                                                                                                                                             "");
7629                                 ioTypeGroup->addChild(vertexArraySizeGroup);
7630
7631                                 for (int primitiveTypeI = 0; primitiveTypeI < TESSPRIMITIVETYPE_LAST; primitiveTypeI++)
7632                                 {
7633                                         const TessPrimitiveType primitiveType = (TessPrimitiveType)primitiveTypeI;
7634                                         vertexArraySizeGroup->addChild(new UserDefinedIOCase(m_context, getTessPrimitiveTypeShaderName(primitiveType), "", primitiveType, ioCases[ndx].ioType, vertexArraySize, UserDefinedIOCase::TESS_CONTROL_OUT_ARRAY_SIZE_IMPLICIT,
7635                                                                                                                                                  (string() + "data/tessellation/user_defined_io_" + getTessPrimitiveTypeShaderName(primitiveType) + "_ref.png").c_str()));
7636                                 }
7637
7638                                 if (ioCases[ndx].ioType == UserDefinedIOCase::IO_TYPE_PER_VERTEX
7639                                         || ioCases[ndx].ioType == UserDefinedIOCase::IO_TYPE_PER_VERTEX_BLOCK)
7640                                 {
7641                                         for (int primitiveTypeI = 0; primitiveTypeI < TESSPRIMITIVETYPE_LAST; primitiveTypeI++)
7642                                         {
7643                                                 const TessPrimitiveType primitiveType = (TessPrimitiveType)primitiveTypeI;
7644                                                 vertexArraySizeGroup->addChild(new UserDefinedIOCase(m_context, (string(getTessPrimitiveTypeShaderName(primitiveType)) + "_explicit_tcs_out_size").c_str(), "", primitiveType, ioCases[ndx].ioType, vertexArraySize, UserDefinedIOCase::TESS_CONTROL_OUT_ARRAY_SIZE_LAYOUT,
7645                                                                                                                                                          (string() + "data/tessellation/user_defined_io_" + getTessPrimitiveTypeShaderName(primitiveType) + "_ref.png").c_str()));
7646                                         }
7647                                 }
7648                         }
7649                 }
7650
7651                 {
7652                         de::MovePtr<TestCaseGroup>      negativeGroup   (new TestCaseGroup(m_context, "negative", "Negative cases"));
7653
7654                         {
7655                                 de::MovePtr<TestCaseGroup>                      es31Group               (new TestCaseGroup(m_context, "es31", "GLSL ES 3.1 Negative cases"));
7656                                 gls::ShaderLibrary                                      shaderLibrary   (m_testCtx, m_context.getRenderContext(), m_context.getContextInfo());
7657                                 const std::vector<tcu::TestNode*>       children                = shaderLibrary.loadShaderFile("shaders/es31/tessellation_negative_user_defined_io.test");
7658
7659                                 for (int i = 0; i < (int)children.size(); i++)
7660                                         es31Group->addChild(children[i]);
7661
7662                                 negativeGroup->addChild(es31Group.release());
7663                         }
7664
7665                         {
7666                                 de::MovePtr<TestCaseGroup>                      es32Group               (new TestCaseGroup(m_context, "es32", "GLSL ES 3.2 Negative cases"));
7667                                 gls::ShaderLibrary                                      shaderLibrary   (m_testCtx, m_context.getRenderContext(), m_context.getContextInfo());
7668                                 const std::vector<tcu::TestNode*>       children                = shaderLibrary.loadShaderFile("shaders/es32/tessellation_negative_user_defined_io.test");
7669
7670                                 for (int i = 0; i < (int)children.size(); i++)
7671                                         es32Group->addChild(children[i]);
7672
7673                                 negativeGroup->addChild(es32Group.release());
7674                         }
7675
7676                         userDefinedIOGroup->addChild(negativeGroup.release());
7677                 }
7678         }
7679 }
7680
7681 } // Functional
7682 } // gles31
7683 } // deqp