modules/gles2/functional/es2fClippingTests.cpp

   1 /*-------------------------------------------------------------------------
   2  * drawElements Quality Program OpenGL ES 2.0 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 Clipping tests.
  22  *//*--------------------------------------------------------------------*/
  23
  24 #include "es2fClippingTests.hpp"
  25 #include "tcuRenderTarget.hpp"
  26 #include "tcuTextureUtil.hpp"
  27 #include "tcuImageCompare.hpp"
  28 #include "tcuVectorUtil.hpp"
  29 #include "deStringUtil.hpp"
  30 #include "deRandom.hpp"
  31
  32 #include "sglrReferenceContext.hpp"
  33 #include "sglrGLContext.hpp"
  34
  35 #include "glwEnums.hpp"
  36 #include "glwDefs.hpp"
  37 #include "glwFunctions.hpp"
  38
  39 using namespace glw; // GLint and other GL types
  40
  41 namespace deqp
  42 {
  43 namespace gles2
  44 {
  45 namespace Functional
  46 {
  47 namespace
  48 {
  49
  50 using tcu::PixelBufferAccess;
  51 using tcu::ConstPixelBufferAccess;
  52 using tcu::TestLog;
  53
  54 static const tcu::Vec4  MASK_COLOR_OK                    = tcu::Vec4(0.0f, 0.1f, 0.0f, 1.0f);
  55 static const tcu::Vec4  MASK_COLOR_DEV                   = tcu::Vec4(0.8f, 0.5f, 0.0f, 1.0f);
  56 static const tcu::Vec4  MASK_COLOR_FAIL                  = tcu::Vec4(1.0f, 0.0f, 1.0f, 1.0f);
  57
  58 const int                                       TEST_CANVAS_SIZE  = 200;
  59 const rr::WindowRectangle       VIEWPORT_WHOLE          (0,                                             0,                                      TEST_CANVAS_SIZE,               TEST_CANVAS_SIZE);
  60 const rr::WindowRectangle       VIEWPORT_CENTER         (TEST_CANVAS_SIZE/4,    TEST_CANVAS_SIZE/4,     TEST_CANVAS_SIZE/2,             TEST_CANVAS_SIZE/2);
  61 const rr::WindowRectangle       VIEWPORT_CORNER         (TEST_CANVAS_SIZE/2,    TEST_CANVAS_SIZE/2,     TEST_CANVAS_SIZE/2,             TEST_CANVAS_SIZE/2);
  62
  63
  64 const char* shaderSourceVertex =        "attribute highp vec4 a_position;\n"
  65                                                                         "attribute highp vec4 a_color;\n"
  66                                                                         "attribute highp float a_pointSize;\n"
  67                                                                         "varying mediump vec4 varFragColor;\n"
  68                                                                         "void main (void)\n"
  69                                                                         "{\n"
  70                                                                         "       gl_Position = a_position;\n"
  71                                                                         "       gl_PointSize = a_pointSize;\n"
  72                                                                         "       varFragColor = a_color;\n"
  73                                                                         "}\n";
  74 const char* shaderSourceFragment =      "varying mediump vec4 varFragColor;\n"
  75                                                                         "void main (void)\n"
  76                                                                         "{\n"
  77                                                                         "       gl_FragColor = varFragColor;\n"
  78                                                                         "}\n";
  79
  80 inline bool isBlack (const tcu::IVec4& a)
  81 {
  82         return a.x() == 0 && a.y() == 0 && a.z() == 0;
  83 }
  84
  85 inline bool isHalfFilled (const tcu::IVec4& a)
  86 {
  87         const tcu::IVec4 halfFilled     (127, 0, 0, 0);
  88         const tcu::IVec4 threshold      (20, 256, 256, 256);
  89
  90         return tcu::boolAll(tcu::lessThanEqual(tcu::abs(a - halfFilled), threshold));
  91 }
  92
  93 inline bool isLessThanHalfFilled (const tcu::IVec4& a)
  94 {
  95         const int halfFilled = 127;
  96         const int threshold      = 20;
  97
  98         return a.x() + threshold < halfFilled;
  99 }
 100
 101 inline bool compareBlackNonBlackPixels (const tcu::IVec4& a, const tcu::IVec4& b)
 102 {
 103         return isBlack(a) == isBlack(b);
 104 }
 105
 106 inline bool compareColoredPixels (const tcu::IVec4& a, const tcu::IVec4& b)
 107 {
 108         const bool aIsBlack = isBlack(a);
 109         const bool bIsBlack = isBlack(b);
 110         const tcu::IVec4 threshold(20, 20, 20, 0);
 111
 112         if (aIsBlack && bIsBlack)
 113                 return true;
 114         if (aIsBlack != bIsBlack)
 115                 return false;
 116
 117         return tcu::boolAll(tcu::lessThanEqual(tcu::abs(a - b), threshold));
 118 }
 119
 120 void blitImageOnBlackSurface(const ConstPixelBufferAccess& src, const PixelBufferAccess& dst)
 121 {
 122         const int                       height  = src.getHeight();
 123         const int                       width   = src.getWidth();
 124
 125         for (int y = 0; y < height; y++)
 126         for (int x = 0; x < width; x++)
 127         {
 128                 const tcu::IVec4 cSrc = src.getPixelInt(x, y);
 129                 const tcu::IVec4 cDst = tcu::IVec4(cSrc.x(), cSrc.y(), cSrc.z(), 255);
 130
 131                 dst.setPixel(cDst, x, y);
 132         }
 133 }
 134
 135 /*--------------------------------------------------------------------*//*!
 136  * \brief Pixelwise comparison of two images.
 137  * \note copied & modified from glsRasterizationTests
 138  *
 139  * Kernel radius defines maximum allowed distance. If radius is 0, only
 140  * perfect match is allowed. Radius of 1 gives a 3x3 kernel. Pixels are
 141  * equal if pixelCmp returns true..
 142  *
 143  * Return values:  -1 = Perfect match
 144  *                                      0 = Deviation within kernel
 145  *                                 >0 = Number of faulty pixels
 146  *//*--------------------------------------------------------------------*/
 147 inline int compareImages (tcu::TestLog& log, const ConstPixelBufferAccess& test, const ConstPixelBufferAccess& ref, const PixelBufferAccess& diffMask, int kernelRadius, bool (*pixelCmp)(const tcu::IVec4& a, const tcu::IVec4& b))
 148 {
 149         const int                       height                          = test.getHeight();
 150         const int                       width                           = test.getWidth();
 151         int                                     deviatingPixels         = 0;
 152         int                                     faultyPixels            = 0;
 153         int                                     compareFailed           = -1;
 154
 155         tcu::clear(diffMask, MASK_COLOR_OK);
 156
 157         for (int y = 0; y < height; y++)
 158         {
 159                 for (int x = 0; x < width; x++)
 160                 {
 161                         const tcu::IVec4 cRef   = ref.getPixelInt(x, y);
 162                         const tcu::IVec4 cTest  = test.getPixelInt(x, y);
 163
 164                         // Pixelwise match, no deviation or fault
 165                         if ((*pixelCmp)(cRef, cTest))
 166                                 continue;
 167
 168                         // Deviation
 169                         {
 170                                 const int radius        = kernelRadius;
 171                                 bool foundRef           = false;
 172                                 bool foundTest          = false;
 173
 174                                 // edges are considered a "deviation" too. The suitable pixel could be "behind" the edge
 175                                 if (y < radius || x < radius || y + radius >= height || x + radius >= width)
 176                                 {
 177                                         foundRef        = true;
 178                                         foundTest       = true;
 179                                 }
 180                                 else
 181                                 {
 182                                         // find ref
 183                                         for (int kY = y - radius; kY <= y + radius; kY++)
 184                                         for (int kX = x - radius; kX <= x + radius; kX++)
 185                                         {
 186                                                 if ((*pixelCmp)(cRef, test.getPixelInt(kX, kY)))
 187                                                 {
 188                                                         foundRef = true;
 189                                                         break;
 190                                                 }
 191                                         }
 192
 193                                         // find result
 194                                         for (int kY = y - radius; kY <= y + radius; kY++)
 195                                         for (int kX = x - radius; kX <= x + radius; kX++)
 196                                         {
 197                                                 if ((*pixelCmp)(cTest, ref.getPixelInt(kX, kY)))
 198                                                 {
 199                                                         foundTest = true;
 200                                                         break;
 201                                                 }
 202                                         }
 203                                 }
 204
 205                                 // A pixel is deviating if the reference color is found inside the kernel and (~= every pixel reference draws must be drawn by the gl too)
 206                                 // the result color is found in the reference image inside the kernel         (~= every pixel gl draws must be drawn by the reference too)
 207                                 if (foundRef && foundTest)
 208                                 {
 209                                         diffMask.setPixel(MASK_COLOR_DEV, x, y);
 210                                         if (compareFailed == -1)
 211                                                 compareFailed = 0;
 212                                         deviatingPixels++;
 213                                         continue;
 214                                 }
 215                         }
 216
 217                         diffMask.setPixel(MASK_COLOR_FAIL, x, y);
 218                         faultyPixels++;                                                                 // The pixel is faulty if the color is not found
 219                         compareFailed = 1;
 220                 }
 221         }
 222
 223         log << TestLog::Message << deviatingPixels      << " deviating pixel(s) found." << TestLog::EndMessage;
 224         log << TestLog::Message << faultyPixels         << " faulty pixel(s) found." << TestLog::EndMessage;
 225
 226         return (compareFailed == 1 ? faultyPixels : compareFailed);
 227 }
 228
 229 /*--------------------------------------------------------------------*//*!
 230  * \brief Pixelwise comparison of two images.
 231  *
 232  * Kernel radius defines maximum allowed distance. If radius is 0, only
 233  * perfect match is allowed. Radius of 1 gives a 3x3 kernel. Pixels are
 234  * equal if they both are black, or both are non-black.
 235  *
 236  * Return values:  -1 = Perfect match
 237  *                                      0 = Deviation within kernel
 238  *                                 >0 = Number of faulty pixels
 239  *//*--------------------------------------------------------------------*/
 240 int compareBlackNonBlackImages (tcu::TestLog& log, const ConstPixelBufferAccess& test, const ConstPixelBufferAccess& ref, const PixelBufferAccess& diffMask, int kernelRadius)
 241 {
 242         return compareImages(log, test, ref, diffMask, kernelRadius, compareBlackNonBlackPixels);
 243 }
 244
 245 /*--------------------------------------------------------------------*//*!
 246  * \brief Pixelwise comparison of two images.
 247  *
 248  * Kernel radius defines maximum allowed distance. If radius is 0, only
 249  * perfect match is allowed. Radius of 1 gives a 3x3 kernel. Pixels are
 250  * equal if they both are black, or both are non-black with color values
 251  * close to each other.
 252  *
 253  * Return values:  -1 = Perfect match
 254  *                                      0 = Deviation within kernel
 255  *                                 >0 = Number of faulty pixels
 256  *//*--------------------------------------------------------------------*/
 257 int compareColoredImages (tcu::TestLog& log, const ConstPixelBufferAccess& test, const ConstPixelBufferAccess& ref, const PixelBufferAccess& diffMask, int kernelRadius)
 258 {
 259         return compareImages(log, test, ref, diffMask, kernelRadius, compareColoredPixels);
 260 }
 261
 262 /*--------------------------------------------------------------------*//*!
 263  * \brief Overdraw check verification
 264  *
 265  * Check that image does not have at any point a
 266  * pixel with red component value > 0.5
 267  *
 268  * Return values:  false = area not filled, or leaking
 269  *//*--------------------------------------------------------------------*/
 270 bool checkHalfFilledImageOverdraw (tcu::TestLog& log, const tcu::RenderTarget& m_renderTarget, const ConstPixelBufferAccess& image, const PixelBufferAccess& output)
 271 {
 272         const int                       height                          = image.getHeight();
 273         const int                       width                           = image.getWidth();
 274
 275         bool                            faulty                          = false;
 276
 277         tcu::clear(output, MASK_COLOR_OK);
 278
 279         for (int y = 0; y < height; y++)
 280         {
 281                 for (int x = 0; x < width; x++)
 282                 {
 283                         const tcu::IVec4        cTest   = image.getPixelInt(x, y);
 284
 285                         const bool pixelValid = isBlack(cTest) || isHalfFilled(cTest) || (m_renderTarget.getNumSamples() > 1 && isLessThanHalfFilled(cTest));
 286
 287                         if (!pixelValid)
 288                         {
 289                                 output.setPixel(MASK_COLOR_FAIL, x, y);
 290                                 faulty = true;
 291                         }
 292                 }
 293         }
 294
 295         if (faulty)
 296                 log << TestLog::Message << "Faulty pixel(s) found." << TestLog::EndMessage;
 297
 298         return !faulty;
 299 }
 300
 301 void checkPointSize (const glw::Functions& gl, float pointSize)
 302 {
 303         GLfloat pointSizeRange[2] = {0,0};
 304         gl.getFloatv(GL_ALIASED_POINT_SIZE_RANGE, pointSizeRange);
 305         if (pointSizeRange[1] < pointSize)
 306                 throw tcu::NotSupportedError("Maximum point size is too low for this test");
 307 }
 308
 309 void checkLineWidth (const glw::Functions& gl, float lineWidth)
 310 {
 311         GLfloat lineWidthRange[2] = {0,0};
 312         gl.getFloatv(GL_ALIASED_LINE_WIDTH_RANGE, lineWidthRange);
 313         if (lineWidthRange[1] < lineWidth)
 314                 throw tcu::NotSupportedError("Maximum line width is too low for this test");
 315 }
 316
 317 tcu::Vec3 IVec3ToVec3 (const tcu::IVec3& v)
 318 {
 319         return tcu::Vec3((float)v.x(), (float)v.y(), (float)v.z());
 320 }
 321
 322 bool pointOnTriangle (const tcu::IVec3& p, const tcu::IVec3& t0, const tcu::IVec3& t1, const tcu::IVec3& t2)
 323 {
 324         // Must be on the plane
 325         const tcu::IVec3 n = tcu::cross(t1 - t0, t2 - t0);
 326         const tcu::IVec3 d = (p - t0);
 327
 328         if (tcu::dot(n, d))
 329                 return false;
 330
 331         // Must be within the triangle area
 332         if (deSign32(tcu::dot(n, tcu::cross(t1 - t0, p - t0))) == deSign32(tcu::dot(n, tcu::cross(t2 - t0, p - t0))))
 333                 return false;
 334         if (deSign32(tcu::dot(n, tcu::cross(t2 - t1, p - t1))) == deSign32(tcu::dot(n, tcu::cross(t0 - t1, p - t1))))
 335                 return false;
 336         if (deSign32(tcu::dot(n, tcu::cross(t0 - t2, p - t2))) == deSign32(tcu::dot(n, tcu::cross(t1 - t2, p - t2))))
 337                 return false;
 338
 339         return true;
 340 }
 341
 342 bool pointsOnLine (const tcu::IVec2& t0, const tcu::IVec2& t1, const tcu::IVec2& t2)
 343 {
 344         return (t1 - t0).x() * (t2 - t0).y() - (t2 - t0).x() * (t1 - t0).y() == 0;
 345 }
 346
 347 // returns true for cases where polygon is (almost) along xz or yz planes (normal.z < 0.1)
 348 // \note[jarkko] Doesn't have to be accurate, just to detect some obviously bad cases
 349 bool twoPointClippedTriangleInvisible(const tcu::Vec3& p, const tcu::IVec3& dir1, const tcu::IVec3& dir2)
 350 {
 351         // fixed-point-like coords
 352         const deInt64                                   fixedScale      = 64;
 353         const deInt64                                   farValue        = 1024;
 354         const tcu::Vector<deInt64, 3>   d1                      = tcu::Vector<deInt64, 3>(dir1.x(), dir1.y(), dir1.z());
 355         const tcu::Vector<deInt64, 3>   d2                      = tcu::Vector<deInt64, 3>(dir2.x(), dir2.y(), dir2.z());
 356         const tcu::Vector<deInt64, 3>   pfixed          = tcu::Vector<deInt64, 3>(deFloorFloatToInt32(p.x() * fixedScale), deFloorFloatToInt32(p.y() * fixedScale), deFloorFloatToInt32(p.z() * fixedScale));
 357         const tcu::Vector<deInt64, 3>   normalDir       = tcu::cross(d1*farValue - pfixed, d2*farValue - pfixed);
 358         const deInt64                                   normalLen2      = tcu::lengthSquared(normalDir);
 359
 360         return (normalDir.z() * normalDir.z() - normalLen2/100) < 0;
 361 }
 362
 363 std::string genClippingPointInfoString(const tcu::Vec4& p)
 364 {
 365         std::ostringstream msg;
 366
 367         if (p.x() < -p.w())             msg << "\t(-X clip)";
 368         if (p.x() >  p.w())             msg << "\t(+X clip)";
 369         if (p.y() < -p.w())             msg << "\t(-Y clip)";
 370         if (p.y() >  p.w())             msg << "\t(+Y clip)";
 371         if (p.z() < -p.w())             msg << "\t(-Z clip)";
 372         if (p.z() >  p.w())             msg << "\t(+Z clip)";
 373
 374         return msg.str();
 375 }
 376
 377 std::string genColorString(const tcu::Vec4& p)
 378 {
 379         const tcu::Vec4 white   (1.0f, 1.0f, 1.0f, 1.0f);
 380         const tcu::Vec4 red             (1.0f, 0.0f, 0.0f, 1.0f);
 381         const tcu::Vec4 yellow  (1.0f, 1.0f, 0.0f, 1.0f);
 382         const tcu::Vec4 blue    (0.0f, 0.0f, 1.0f, 1.0f);
 383
 384         if (p == white)         return "(white)";
 385         if (p == red)           return "(red)";
 386         if (p == yellow)        return "(yellow)";
 387         if (p == blue)          return "(blue)";
 388         return "";
 389 }
 390
 391 class PositionColorShader : public sglr::ShaderProgram
 392 {
 393 public:
 394         enum
 395         {
 396                 VARYINGLOC_COLOR = 0
 397         };
 398
 399                         PositionColorShader (void);
 400
 401         void    shadeVertices           (const rr::VertexAttrib* inputs, rr::VertexPacket* const* packets, const int numPackets) const;
 402         void    shadeFragments          (rr::FragmentPacket* packets, const int numPackets, const rr::FragmentShadingContext& context) const;
 403 };
 404
 405 PositionColorShader::PositionColorShader (void)
 406         : sglr::ShaderProgram(sglr::pdec::ShaderProgramDeclaration()
 407                                                         << sglr::pdec::VertexAttribute("a_position", rr::GENERICVECTYPE_FLOAT)
 408                                                         << sglr::pdec::VertexAttribute("a_color", rr::GENERICVECTYPE_FLOAT)
 409                                                         << sglr::pdec::VertexAttribute("a_pointSize", rr::GENERICVECTYPE_FLOAT)
 410                                                         << sglr::pdec::VertexToFragmentVarying(rr::GENERICVECTYPE_FLOAT)
 411                                                         << sglr::pdec::FragmentOutput(rr::GENERICVECTYPE_FLOAT)
 412                                                         << sglr::pdec::VertexSource(shaderSourceVertex)
 413                                                         << sglr::pdec::FragmentSource(shaderSourceFragment))
 414 {
 415 }
 416
 417 void PositionColorShader::shadeVertices (const rr::VertexAttrib* inputs, rr::VertexPacket* const* packets, const int numPackets) const
 418 {
 419         for (int packetNdx = 0; packetNdx < numPackets; ++packetNdx)
 420         {
 421                 const int positionAttrLoc = 0;
 422                 const int colorAttrLoc = 1;
 423                 const int pointSizeAttrLoc = 2;
 424
 425                 rr::VertexPacket& packet = *packets[packetNdx];
 426
 427                 // Transform to position
 428                 packet.position = rr::readVertexAttribFloat(inputs[positionAttrLoc], packet.instanceNdx, packet.vertexNdx);
 429
 430                 // output point size
 431                 packet.pointSize = rr::readVertexAttribFloat(inputs[pointSizeAttrLoc], packet.instanceNdx, packet.vertexNdx).x();
 432
 433                 // Pass color to FS
 434                 packet.outputs[VARYINGLOC_COLOR] = rr::readVertexAttribFloat(inputs[colorAttrLoc], packet.instanceNdx, packet.vertexNdx);
 435         }
 436 }
 437
 438 void PositionColorShader::shadeFragments (rr::FragmentPacket* packets, const int numPackets, const rr::FragmentShadingContext& context) const
 439 {
 440         for (int packetNdx = 0; packetNdx < numPackets; ++packetNdx)
 441         {
 442                 rr::FragmentPacket& packet = packets[packetNdx];
 443
 444                 for (int fragNdx = 0; fragNdx < 4; ++fragNdx)
 445                         rr::writeFragmentOutput(context, packetNdx, fragNdx, 0, rr::readVarying<float>(packet, context, VARYINGLOC_COLOR, fragNdx));
 446         }
 447 }
 448
 449 class RenderTestCase : public TestCase
 450 {
 451 public:
 452                                         RenderTestCase  (Context& context, const char* name, const char* description);
 453
 454         virtual void    testRender              (void) = DE_NULL;
 455         virtual void    init                    (void) { }
 456
 457         IterateResult   iterate                 (void);
 458 };
 459
 460 RenderTestCase::RenderTestCase (Context& context, const char* name, const char* description)
 461         : TestCase      (context, name, description)
 462 {
 463 }
 464
 465 RenderTestCase::IterateResult RenderTestCase::iterate (void)
 466 {
 467         const int width  = m_context.getRenderTarget().getWidth();
 468         const int height = m_context.getRenderTarget().getHeight();
 469
 470         m_testCtx.getLog() << TestLog::Message << "Render target size: " << width << "x" << height << TestLog::EndMessage;
 471         if (width < TEST_CANVAS_SIZE || height < TEST_CANVAS_SIZE)
 472                 throw tcu::NotSupportedError(std::string("Render target size must be at least ") + de::toString(TEST_CANVAS_SIZE) + "x" + de::toString(TEST_CANVAS_SIZE));
 473
 474         m_testCtx.setTestResult(QP_TEST_RESULT_PASS, "Pass"); // success by default
 475         testRender();
 476
 477         return STOP;
 478 }
 479
 480 class PointCase : public RenderTestCase
 481 {
 482 public:
 483                                                                         PointCase       (Context& context, const char* name, const char* description, const tcu::Vec4* pointsBegin, const tcu::Vec4* pointsEnd, float pointSize, const rr::WindowRectangle& viewport);
 484
 485         void                                                    init            (void);
 486         void                                                    testRender      (void);
 487
 488 private:
 489         const std::vector<tcu::Vec4>    m_points;
 490         const float                                             m_pointSize;
 491         const rr::WindowRectangle               m_viewport;
 492 };
 493
 494 PointCase::PointCase (Context& context, const char* name, const char* description, const tcu::Vec4* pointsBegin, const tcu::Vec4* pointsEnd, float pointSize, const rr::WindowRectangle& viewport)
 495         : RenderTestCase(context, name, description)
 496         , m_points              (pointsBegin, pointsEnd)
 497         , m_pointSize   (pointSize)
 498         , m_viewport    (viewport)
 499 {
 500 }
 501
 502 void PointCase::init (void)
 503 {
 504         const glw::Functions& gl = m_context.getRenderContext().getFunctions();
 505         checkPointSize (gl, m_pointSize);
 506 }
 507
 508 void PointCase::testRender (void)
 509 {
 510         using tcu::TestLog;
 511
 512         const int numSamples                    = de::max(m_context.getRenderTarget().getNumSamples(), 1);
 513
 514         tcu::TestLog&                                   log                     = m_testCtx.getLog();
 515         sglr::GLContext                                 glesContext     (m_context.getRenderContext(), log, 0, tcu::IVec4(0, 0, TEST_CANVAS_SIZE, TEST_CANVAS_SIZE));
 516         sglr::ReferenceContextLimits    limits;
 517         sglr::ReferenceContextBuffers   buffers         (m_context.getRenderTarget().getPixelFormat(), m_context.getRenderTarget().getDepthBits(), 0, TEST_CANVAS_SIZE, TEST_CANVAS_SIZE, numSamples);
 518         sglr::ReferenceContext                  refContext      (limits, buffers.getColorbuffer(), buffers.getDepthbuffer(), buffers.getStencilbuffer());
 519         PositionColorShader                             program;
 520         tcu::Surface                                    testSurface     (TEST_CANVAS_SIZE, TEST_CANVAS_SIZE);
 521         tcu::Surface                                    refSurface      (TEST_CANVAS_SIZE, TEST_CANVAS_SIZE);
 522         sglr::Context*                                  contexts[2] = {&glesContext, &refContext};
 523         tcu::Surface*                                   surfaces[2] = {&testSurface, &refSurface};
 524
 525         // log the purpose of the test
 526         log << TestLog::Message << "Viewport: left=" << m_viewport.left << "\tbottom=" << m_viewport.bottom << "\twidth=" << m_viewport.width << "\theight=" << m_viewport.height << TestLog::EndMessage;
 527         log << TestLog::Message << "Rendering points with point size " << m_pointSize << ". Coordinates:" << TestLog::EndMessage;
 528         for (size_t ndx = 0; ndx < m_points.size(); ++ndx)
 529                 log << TestLog::Message
 530                                 << "\tx=" << m_points[ndx].x()
 531                                 << "\ty=" << m_points[ndx].y()
 532                                 << "\tz=" << m_points[ndx].z()
 533                                 << "\tw=" << m_points[ndx].w()
 534                                 << "\t" << genClippingPointInfoString(m_points[ndx])
 535                                 << TestLog::EndMessage;
 536
 537         for (int contextNdx = 0; contextNdx < 2; ++contextNdx)
 538         {
 539                 sglr::Context&  ctx                             = *contexts[contextNdx];
 540                 tcu::Surface&   dstSurface              = *surfaces[contextNdx];
 541                 const deUint32  programId               = ctx.createProgram(&program);
 542                 const GLint             positionLoc             = ctx.getAttribLocation(programId, "a_position");
 543                 const GLint             pointSizeLoc    = ctx.getAttribLocation(programId, "a_pointSize");
 544                 const GLint             colorLoc                = ctx.getAttribLocation(programId, "a_color");
 545
 546                 ctx.clearColor                                  (0, 0, 0, 1);
 547                 ctx.clearDepthf                                 (1.0f);
 548                 ctx.clear                                               (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 549                 ctx.viewport                                    (m_viewport.left, m_viewport.bottom, m_viewport.width, m_viewport.height);
 550                 ctx.useProgram                                  (programId);
 551                 ctx.enableVertexAttribArray             (positionLoc);
 552                 ctx.vertexAttribPointer                 (positionLoc, 4, GL_FLOAT, GL_FALSE, 0, &m_points[0]);
 553                 ctx.vertexAttrib1f                              (pointSizeLoc, m_pointSize);
 554                 ctx.vertexAttrib4f                              (colorLoc, 1.0f, 1.0f, 1.0f, 1.0f);
 555                 ctx.drawArrays                                  (GL_POINTS, 0, (glw::GLsizei)m_points.size());
 556                 ctx.disableVertexAttribArray    (positionLoc);
 557                 ctx.useProgram                                  (0);
 558                 ctx.deleteProgram                               (programId);
 559                 ctx.finish                                              ();
 560
 561                 ctx.readPixels(dstSurface, 0, 0, TEST_CANVAS_SIZE, TEST_CANVAS_SIZE);
 562         }
 563
 564         // do the comparison
 565         {
 566                 tcu::Surface            diffMask                (TEST_CANVAS_SIZE, TEST_CANVAS_SIZE);
 567                 const int                       kernelRadius    = 1;
 568                 int                                     faultyPixels;
 569
 570                 log << TestLog::Message << "Comparing images... " << TestLog::EndMessage;
 571                 log << TestLog::Message << "Deviation within radius of " << kernelRadius << " is allowed." << TestLog::EndMessage;
 572
 573                 faultyPixels = compareBlackNonBlackImages(log, testSurface.getAccess(), refSurface.getAccess(), diffMask.getAccess(), kernelRadius);
 574
 575                 if (faultyPixels > 0)
 576                 {
 577                         log << TestLog::ImageSet("Images", "Image comparison")
 578                                 << TestLog::Image("TestImage", "Test image", testSurface.getAccess())
 579                                 << TestLog::Image("ReferenceImage", "Reference image", refSurface.getAccess())
 580                                 << TestLog::Image("DifferenceMask", "Difference mask", diffMask.getAccess())
 581                                 << TestLog::EndImageSet
 582                                 << tcu::TestLog::Message << "Got " << faultyPixels << " faulty pixel(s)." << tcu::TestLog::EndMessage;
 583
 584                         m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "Got faulty pixels");
 585                 }
 586         }
 587 }
 588
 589 class LineRenderTestCase : public RenderTestCase
 590 {
 591 public:
 592         struct ColoredLineData
 593         {
 594                 tcu::Vec4 p0;
 595                 tcu::Vec4 c0;
 596                 tcu::Vec4 p1;
 597                 tcu::Vec4 c1;
 598         };
 599
 600         struct ColorlessLineData
 601         {
 602                 tcu::Vec4 p0;
 603                 tcu::Vec4 p1;
 604         };
 605                                                                                 LineRenderTestCase              (Context& context, const char* name, const char* description, const ColoredLineData*   linesBegin, const ColoredLineData*   linesEnd, float lineWidth, const rr::WindowRectangle& viewport);
 606                                                                                 LineRenderTestCase              (Context& context, const char* name, const char* description, const ColorlessLineData* linesBegin, const ColorlessLineData* linesEnd, float lineWidth, const rr::WindowRectangle& viewport);
 607
 608         virtual void                                            verifyImage                             (const tcu::ConstPixelBufferAccess& testImageAccess, const tcu::ConstPixelBufferAccess& referenceImageAccess) = DE_NULL;
 609         void                                                            init                                    (void);
 610         void                                                            testRender                              (void);
 611
 612 protected:
 613         const float                                                     m_lineWidth;
 614
 615 private:
 616         std::vector<ColoredLineData>            convertToColoredLines   (const ColorlessLineData* linesBegin, const ColorlessLineData* linesEnd);
 617
 618         const std::vector<ColoredLineData>      m_lines;
 619         const rr::WindowRectangle                       m_viewport;
 620 };
 621
 622 LineRenderTestCase::LineRenderTestCase (Context& context, const char* name, const char* description, const ColoredLineData* linesBegin, const ColoredLineData* linesEnd, float lineWidth, const rr::WindowRectangle& viewport)
 623         : RenderTestCase        (context, name, description)
 624         , m_lineWidth           (lineWidth)
 625         , m_lines                       (linesBegin, linesEnd)
 626         , m_viewport            (viewport)
 627 {
 628 }
 629
 630 LineRenderTestCase::LineRenderTestCase (Context& context, const char* name, const char* description, const ColorlessLineData* linesBegin, const ColorlessLineData* linesEnd, float lineWidth, const rr::WindowRectangle& viewport)
 631         : RenderTestCase        (context, name, description)
 632         , m_lineWidth           (lineWidth)
 633         , m_lines                       (convertToColoredLines(linesBegin, linesEnd))
 634         , m_viewport            (viewport)
 635 {
 636 }
 637
 638 void LineRenderTestCase::init (void)
 639 {
 640         const glw::Functions& gl = m_context.getRenderContext().getFunctions();
 641         checkLineWidth (gl, m_lineWidth);
 642 }
 643
 644 void LineRenderTestCase::testRender (void)
 645 {
 646         using tcu::TestLog;
 647
 648         const int numSamples                    = de::max(m_context.getRenderTarget().getNumSamples(), 1);
 649         const int verticesPerLine               = 2;
 650
 651         tcu::TestLog&                                   log                     = m_testCtx.getLog();
 652         sglr::GLContext                                 glesContext     (m_context.getRenderContext(), log, 0, tcu::IVec4(0, 0, TEST_CANVAS_SIZE, TEST_CANVAS_SIZE));
 653         sglr::ReferenceContextLimits    limits;
 654         sglr::ReferenceContextBuffers   buffers         (m_context.getRenderTarget().getPixelFormat(), m_context.getRenderTarget().getDepthBits(), 0, TEST_CANVAS_SIZE, TEST_CANVAS_SIZE, numSamples);
 655         sglr::ReferenceContext                  refContext      (limits, buffers.getColorbuffer(), buffers.getDepthbuffer(), buffers.getStencilbuffer());
 656         PositionColorShader                             program;
 657         tcu::Surface                                    testSurface     (TEST_CANVAS_SIZE, TEST_CANVAS_SIZE);
 658         tcu::Surface                                    refSurface      (TEST_CANVAS_SIZE, TEST_CANVAS_SIZE);
 659         sglr::Context*                                  contexts[2] = {&glesContext, &refContext};
 660         tcu::Surface*                                   surfaces[2] = {&testSurface, &refSurface};
 661
 662         // log the purpose of the test
 663         log << TestLog::Message << "Viewport: left=" << m_viewport.left << "\tbottom=" << m_viewport.bottom << "\twidth=" << m_viewport.width << "\theight=" << m_viewport.height << TestLog::EndMessage;
 664         log << TestLog::Message << "Rendering lines with line width " << m_lineWidth << ". Coordinates:" << TestLog::EndMessage;
 665         for (size_t ndx = 0; ndx < m_lines.size(); ++ndx)
 666         {
 667                 const std::string fromProperties = genClippingPointInfoString(m_lines[ndx].p0);
 668                 const std::string toProperties   = genClippingPointInfoString(m_lines[ndx].p1);
 669
 670                 log << TestLog::Message << "\tfrom (x=" << m_lines[ndx].p0.x() << "\ty=" << m_lines[ndx].p0.y() << "\tz=" << m_lines[ndx].p0.z() << "\tw=" << m_lines[ndx].p0.w() << ")\t" << fromProperties << TestLog::EndMessage;
 671                 log << TestLog::Message << "\tto   (x=" << m_lines[ndx].p1.x() << "\ty=" << m_lines[ndx].p1.y() << "\tz=" << m_lines[ndx].p1.z() << "\tw=" << m_lines[ndx].p1.w() << ")\t" << toProperties   << TestLog::EndMessage;
 672                 log << TestLog::Message << TestLog::EndMessage;
 673         }
 674
 675         // render test image
 676         for (int contextNdx = 0; contextNdx < 2; ++contextNdx)
 677         {
 678                 sglr::Context&  ctx                             = *contexts[contextNdx];
 679                 tcu::Surface&   dstSurface              = *surfaces[contextNdx];
 680                 const deUint32  programId               = ctx.createProgram(&program);
 681                 const GLint             positionLoc             = ctx.getAttribLocation(programId, "a_position");
 682                 const GLint             colorLoc                = ctx.getAttribLocation(programId, "a_color");
 683
 684                 ctx.clearColor                                  (0, 0, 0, 1);
 685                 ctx.clearDepthf                                 (1.0f);
 686                 ctx.clear                                               (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 687                 ctx.viewport                                    (m_viewport.left, m_viewport.bottom, m_viewport.width, m_viewport.height);
 688                 ctx.useProgram                                  (programId);
 689                 ctx.enableVertexAttribArray             (positionLoc);
 690                 ctx.enableVertexAttribArray             (colorLoc);
 691                 ctx.vertexAttribPointer                 (positionLoc,   4, GL_FLOAT, GL_FALSE, sizeof(GLfloat[8]), &m_lines[0].p0);
 692                 ctx.vertexAttribPointer                 (colorLoc,              4, GL_FLOAT, GL_FALSE, sizeof(GLfloat[8]), &m_lines[0].c0);
 693                 ctx.lineWidth                                   (m_lineWidth);
 694                 ctx.drawArrays                                  (GL_LINES, 0, verticesPerLine * (glw::GLsizei)m_lines.size());
 695                 ctx.disableVertexAttribArray    (positionLoc);
 696                 ctx.disableVertexAttribArray    (colorLoc);
 697                 ctx.useProgram                                  (0);
 698                 ctx.deleteProgram                               (programId);
 699                 ctx.finish                                              ();
 700
 701                 ctx.readPixels(dstSurface, 0, 0, TEST_CANVAS_SIZE, TEST_CANVAS_SIZE);
 702         }
 703
 704         // compare
 705         verifyImage(testSurface.getAccess(), refSurface.getAccess());
 706 }
 707
 708 std::vector<LineRenderTestCase::ColoredLineData> LineRenderTestCase::convertToColoredLines(const ColorlessLineData* linesBegin, const ColorlessLineData* linesEnd)
 709 {
 710         std::vector<ColoredLineData> ret;
 711
 712         for (const ColorlessLineData* it = linesBegin; it != linesEnd; ++it)
 713         {
 714                 ColoredLineData r;
 715
 716                 r.p0 = (*it).p0;
 717                 r.c0 = tcu::Vec4(1, 1, 1, 1);
 718                 r.p1 = (*it).p1;
 719                 r.c1 = tcu::Vec4(1, 1, 1, 1);
 720
 721                 ret.push_back(r);
 722         }
 723
 724         return ret;
 725 }
 726
 727 class LineCase : public LineRenderTestCase
 728 {
 729 public:
 730                                 LineCase                        (Context& context, const char* name, const char* description, const LineRenderTestCase::ColorlessLineData* linesBegin, const LineRenderTestCase::ColorlessLineData* linesEnd, float lineWidth, const rr::WindowRectangle& viewport, int searchKernelSize = 1);
 731
 732         void            verifyImage                     (const tcu::ConstPixelBufferAccess& testImageAccess, const tcu::ConstPixelBufferAccess& referenceImageAccess);
 733
 734 private:
 735         const int       m_searchKernelSize;
 736 };
 737
 738 LineCase::LineCase (Context& context, const char* name, const char* description, const LineRenderTestCase::ColorlessLineData* linesBegin, const LineRenderTestCase::ColorlessLineData* linesEnd, float lineWidth, const rr::WindowRectangle& viewport, int searchKernelSize)
 739         : LineRenderTestCase    (context, name, description, linesBegin, linesEnd, lineWidth, viewport)
 740         , m_searchKernelSize    (searchKernelSize)
 741 {
 742 }
 743
 744 void LineCase::verifyImage (const tcu::ConstPixelBufferAccess& testImageAccess, const tcu::ConstPixelBufferAccess& referenceImageAccess)
 745 {
 746         const int               faultyLimit             = 6;
 747         int                             faultyPixels;
 748
 749         const bool              isMsaa                  = m_context.getRenderTarget().getNumSamples() > 1;
 750         tcu::TestLog&   log                             = m_testCtx.getLog();
 751         tcu::Surface    diffMask                (TEST_CANVAS_SIZE, TEST_CANVAS_SIZE);
 752
 753         log << TestLog::Message << "Comparing images... " << TestLog::EndMessage;
 754         log << TestLog::Message << "Deviation within radius of " << m_searchKernelSize << " is allowed." << TestLog::EndMessage;
 755         log << TestLog::Message << faultyLimit << " faulty pixels are allowed." << TestLog::EndMessage;
 756
 757         faultyPixels = compareBlackNonBlackImages(log, testImageAccess, referenceImageAccess, diffMask.getAccess(), m_searchKernelSize);
 758
 759         if (faultyPixels > faultyLimit)
 760         {
 761                 log << TestLog::ImageSet("Images", "Image comparison")
 762                         << TestLog::Image("TestImage", "Test image", testImageAccess)
 763                         << TestLog::Image("ReferenceImage", "Reference image", referenceImageAccess)
 764                         << TestLog::Image("DifferenceMask", "Difference mask", diffMask.getAccess())
 765                         << TestLog::EndImageSet
 766                         << tcu::TestLog::Message << "Got " << faultyPixels << " faulty pixel(s)." << tcu::TestLog::EndMessage;
 767
 768                 if (m_lineWidth != 1.0f && isMsaa)
 769                 {
 770                         log << TestLog::Message << "Wide line support is optional, reporting compatibility warning." << TestLog::EndMessage;
 771                         m_testCtx.setTestResult(QP_TEST_RESULT_COMPATIBILITY_WARNING, "Wide line clipping failed");
 772                 }
 773                 else
 774                         m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "Got faulty pixels");
 775         }
 776 }
 777
 778 class ColoredLineCase : public LineRenderTestCase
 779 {
 780 public:
 781         ColoredLineCase (Context& context, const char* name, const char* description, const LineRenderTestCase::ColoredLineData* linesBegin, const LineRenderTestCase::ColoredLineData* linesEnd, float lineWidth, const rr::WindowRectangle& viewport);
 782
 783         void verifyImage (const tcu::ConstPixelBufferAccess& testImageAccess, const tcu::ConstPixelBufferAccess& referenceImageAccess);
 784 };
 785
 786 ColoredLineCase::ColoredLineCase (Context& context, const char* name, const char* description, const LineRenderTestCase::ColoredLineData* linesBegin, const LineRenderTestCase::ColoredLineData* linesEnd, float lineWidth, const rr::WindowRectangle& viewport)
 787         : LineRenderTestCase (context, name, description, linesBegin, linesEnd, lineWidth, viewport)
 788 {
 789 }
 790
 791 void ColoredLineCase::verifyImage (const tcu::ConstPixelBufferAccess& testImageAccess, const tcu::ConstPixelBufferAccess& referenceImageAccess)
 792 {
 793         const bool              msaa    = m_context.getRenderTarget().getNumSamples() > 1;
 794         tcu::TestLog&   log             = m_testCtx.getLog();
 795
 796         if (!msaa)
 797         {
 798                 const int               kernelRadius    = 1;
 799                 const int               faultyLimit             = 6;
 800                 int                             faultyPixels;
 801                 tcu::Surface    diffMask                (TEST_CANVAS_SIZE, TEST_CANVAS_SIZE);
 802
 803                 log << TestLog::Message << "Comparing images... " << TestLog::EndMessage;
 804                 log << TestLog::Message << "Deviation within radius of " << kernelRadius << " is allowed." << TestLog::EndMessage;
 805                 log << TestLog::Message << faultyLimit << " faulty pixels are allowed." << TestLog::EndMessage;
 806
 807                 faultyPixels = compareColoredImages(log, testImageAccess, referenceImageAccess, diffMask.getAccess(), kernelRadius);
 808
 809                 if (faultyPixels > faultyLimit)
 810                 {
 811                         log << TestLog::ImageSet("Images", "Image comparison")
 812                                 << TestLog::Image("TestImage", "Test image", testImageAccess)
 813                                 << TestLog::Image("ReferenceImage", "Reference image", referenceImageAccess)
 814                                 << TestLog::Image("DifferenceMask", "Difference mask", diffMask.getAccess())
 815                                 << TestLog::EndImageSet
 816                                 << tcu::TestLog::Message << "Got " << faultyPixels << " faulty pixel(s)." << tcu::TestLog::EndMessage;
 817
 818                         m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "Got faulty pixels");
 819                 }
 820         }
 821         else
 822         {
 823                 const float threshold = 0.3f;
 824                 if (!tcu::fuzzyCompare(log, "Images", "", referenceImageAccess, testImageAccess, threshold, tcu::COMPARE_LOG_ON_ERROR))
 825                 {
 826                         if (m_lineWidth != 1.0f)
 827                         {
 828                                 log << TestLog::Message << "Wide line support is optional, reporting compatibility warning." << TestLog::EndMessage;
 829                                 m_testCtx.setTestResult(QP_TEST_RESULT_COMPATIBILITY_WARNING, "Wide line clipping failed");
 830                         }
 831                         else
 832                                 m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "Got faulty pixels");
 833                 }
 834         }
 835 }
 836
 837 class TriangleCaseBase : public RenderTestCase
 838 {
 839 public:
 840         struct TriangleData
 841         {
 842                 tcu::Vec4 p0;
 843                 tcu::Vec4 c0;
 844                 tcu::Vec4 p1;
 845                 tcu::Vec4 c1;
 846                 tcu::Vec4 p2;
 847                 tcu::Vec4 c2;
 848         };
 849
 850                                                                                 TriangleCaseBase        (Context& context, const char* name, const char* description, const TriangleData* polysBegin, const TriangleData* polysEnd, const rr::WindowRectangle& viewport);
 851
 852         virtual void                                            verifyImage                     (const tcu::ConstPixelBufferAccess& testImageAccess, const tcu::ConstPixelBufferAccess& referenceImageAccess) = DE_NULL;
 853         void                                                            testRender                      (void);
 854
 855 private:
 856         const std::vector<TriangleData>         m_polys;
 857         const rr::WindowRectangle                       m_viewport;
 858 };
 859
 860 TriangleCaseBase::TriangleCaseBase (Context& context, const char* name, const char* description, const TriangleData* polysBegin, const TriangleData* polysEnd, const rr::WindowRectangle& viewport)
 861         : RenderTestCase(context, name, description)
 862         , m_polys               (polysBegin, polysEnd)
 863         , m_viewport    (viewport)
 864 {
 865 }
 866
 867 void TriangleCaseBase::testRender (void)
 868 {
 869         using tcu::TestLog;
 870
 871         const int numSamples                    = de::max(m_context.getRenderTarget().getNumSamples(), 1);
 872         const int verticesPerTriangle   = 3;
 873
 874         tcu::TestLog&                                   log                     = m_testCtx.getLog();
 875         sglr::GLContext                                 glesContext     (m_context.getRenderContext(), log, 0, tcu::IVec4(0, 0, TEST_CANVAS_SIZE, TEST_CANVAS_SIZE));
 876         sglr::ReferenceContextLimits    limits;
 877         sglr::ReferenceContextBuffers   buffers         (m_context.getRenderTarget().getPixelFormat(), m_context.getRenderTarget().getDepthBits(), 0, TEST_CANVAS_SIZE, TEST_CANVAS_SIZE, numSamples);
 878         sglr::ReferenceContext                  refContext      (limits, buffers.getColorbuffer(), buffers.getDepthbuffer(), buffers.getStencilbuffer());
 879         PositionColorShader                             program;
 880         tcu::Surface                                    testSurface     (TEST_CANVAS_SIZE, TEST_CANVAS_SIZE);
 881         tcu::Surface                                    refSurface      (TEST_CANVAS_SIZE, TEST_CANVAS_SIZE);
 882         sglr::Context*                                  contexts[2] = {&glesContext, &refContext};
 883         tcu::Surface*                                   surfaces[2] = {&testSurface, &refSurface};
 884
 885         // log the purpose of the test
 886         log << TestLog::Message << "Viewport: left=" << m_viewport.left << "\tbottom=" << m_viewport.bottom << "\twidth=" << m_viewport.width << "\theight=" << m_viewport.height << TestLog::EndMessage;
 887         log << TestLog::Message << "Rendering triangles. Coordinates:" << TestLog::EndMessage;
 888         for (size_t ndx = 0; ndx < m_polys.size(); ++ndx)
 889         {
 890                 const std::string v0Properties = genClippingPointInfoString(m_polys[ndx].p0);
 891                 const std::string v1Properties = genClippingPointInfoString(m_polys[ndx].p1);
 892                 const std::string v2Properties = genClippingPointInfoString(m_polys[ndx].p2);
 893                 const std::string c0Properties = genColorString(m_polys[ndx].c0);
 894                 const std::string c1Properties = genColorString(m_polys[ndx].c1);
 895                 const std::string c2Properties = genColorString(m_polys[ndx].c2);
 896
 897                 log << TestLog::Message << "\tv0 (x=" << m_polys[ndx].p0.x() << "\ty=" << m_polys[ndx].p0.y() << "\tz=" << m_polys[ndx].p0.z() << "\tw=" << m_polys[ndx].p0.w() << ")\t" << v0Properties << "\t" << c0Properties << TestLog::EndMessage;
 898                 log << TestLog::Message << "\tv1 (x=" << m_polys[ndx].p1.x() << "\ty=" << m_polys[ndx].p1.y() << "\tz=" << m_polys[ndx].p1.z() << "\tw=" << m_polys[ndx].p1.w() << ")\t" << v1Properties << "\t" << c1Properties << TestLog::EndMessage;
 899                 log << TestLog::Message << "\tv2 (x=" << m_polys[ndx].p2.x() << "\ty=" << m_polys[ndx].p2.y() << "\tz=" << m_polys[ndx].p2.z() << "\tw=" << m_polys[ndx].p2.w() << ")\t" << v2Properties << "\t" << c2Properties << TestLog::EndMessage;
 900                 log << TestLog::Message << TestLog::EndMessage;
 901         }
 902
 903         // render test image
 904         for (int contextNdx = 0; contextNdx < 2; ++contextNdx)
 905         {
 906                 sglr::Context&  ctx                             = *contexts[contextNdx];
 907                 tcu::Surface&   dstSurface              = *surfaces[contextNdx];
 908                 const deUint32  programId               = ctx.createProgram(&program);
 909                 const GLint             positionLoc             = ctx.getAttribLocation(programId, "a_position");
 910                 const GLint             colorLoc                = ctx.getAttribLocation(programId, "a_color");
 911
 912                 ctx.clearColor                                  (0, 0, 0, 1);
 913                 ctx.clearDepthf                                 (1.0f);
 914                 ctx.clear                                               (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 915                 ctx.viewport                                    (m_viewport.left, m_viewport.bottom, m_viewport.width, m_viewport.height);
 916                 ctx.useProgram                                  (programId);
 917                 ctx.enableVertexAttribArray             (positionLoc);
 918                 ctx.enableVertexAttribArray             (colorLoc);
 919                 ctx.vertexAttribPointer                 (positionLoc,   4, GL_FLOAT, GL_FALSE, sizeof(GLfloat[8]), &m_polys[0].p0);
 920                 ctx.vertexAttribPointer                 (colorLoc,              4, GL_FLOAT, GL_FALSE, sizeof(GLfloat[8]), &m_polys[0].c0);
 921                 ctx.drawArrays                                  (GL_TRIANGLES, 0, verticesPerTriangle * (glw::GLsizei)m_polys.size());
 922                 ctx.disableVertexAttribArray    (positionLoc);
 923                 ctx.disableVertexAttribArray    (colorLoc);
 924                 ctx.useProgram                                  (0);
 925                 ctx.deleteProgram                               (programId);
 926                 ctx.finish                                              ();
 927
 928                 ctx.readPixels(dstSurface, 0, 0, TEST_CANVAS_SIZE, TEST_CANVAS_SIZE);
 929         }
 930
 931         verifyImage(testSurface.getAccess(), refSurface.getAccess());
 932 }
 933
 934 class TriangleCase : public TriangleCaseBase
 935 {
 936 public:
 937                         TriangleCase    (Context& context, const char* name, const char* description, const TriangleData* polysBegin, const TriangleData* polysEnd, const rr::WindowRectangle& viewport);
 938
 939         void    verifyImage             (const tcu::ConstPixelBufferAccess& testImageAccess, const tcu::ConstPixelBufferAccess& referenceImageAccess);
 940 };
 941
 942 TriangleCase::TriangleCase (Context& context, const char* name, const char* description, const TriangleData* polysBegin, const TriangleData* polysEnd, const rr::WindowRectangle& viewport)
 943         : TriangleCaseBase(context, name, description, polysBegin, polysEnd, viewport)
 944 {
 945 }
 946
 947 void TriangleCase::verifyImage (const tcu::ConstPixelBufferAccess& testImageAccess, const tcu::ConstPixelBufferAccess& referenceImageAccess)
 948 {
 949         const int                       kernelRadius    = 1;
 950         const int                       faultyLimit             = 6;
 951         tcu::TestLog&           log                             = m_testCtx.getLog();
 952         tcu::Surface            diffMask                (TEST_CANVAS_SIZE, TEST_CANVAS_SIZE);
 953         int                                     faultyPixels;
 954
 955         log << TestLog::Message << "Comparing images... " << TestLog::EndMessage;
 956         log << TestLog::Message << "Deviation within radius of " << kernelRadius << " is allowed." << TestLog::EndMessage;
 957         log << TestLog::Message << faultyLimit << " faulty pixels are allowed." << TestLog::EndMessage;
 958
 959         faultyPixels = compareBlackNonBlackImages(log, testImageAccess, referenceImageAccess, diffMask.getAccess(), kernelRadius);
 960
 961         if (faultyPixels > faultyLimit)
 962         {
 963                 log << TestLog::ImageSet("Images", "Image comparison")
 964                         << TestLog::Image("TestImage", "Test image", testImageAccess)
 965                         << TestLog::Image("ReferenceImage", "Reference image", referenceImageAccess)
 966                         << TestLog::Image("DifferenceMask", "Difference mask", diffMask.getAccess())
 967                         << TestLog::EndImageSet
 968                         << tcu::TestLog::Message << "Got " << faultyPixels << " faulty pixel(s)." << tcu::TestLog::EndMessage;
 969
 970                 m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "Got faulty pixels");
 971         }
 972 }
 973
 974 class TriangleAttributeCase : public TriangleCaseBase
 975 {
 976 public:
 977                         TriangleAttributeCase   (Context& context, const char* name, const char* description, const TriangleData* polysBegin, const TriangleData* polysEnd, const rr::WindowRectangle& viewport);
 978
 979         void    verifyImage                             (const tcu::ConstPixelBufferAccess& testImageAccess, const tcu::ConstPixelBufferAccess& referenceImageAccess);
 980 };
 981
 982 TriangleAttributeCase::TriangleAttributeCase (Context& context, const char* name, const char* description, const TriangleData* polysBegin, const TriangleData* polysEnd, const rr::WindowRectangle& viewport)
 983         : TriangleCaseBase(context, name, description, polysBegin, polysEnd, viewport)
 984 {
 985 }
 986
 987 void TriangleAttributeCase::verifyImage (const tcu::ConstPixelBufferAccess& testImageAccess, const tcu::ConstPixelBufferAccess& referenceImageAccess)
 988 {
 989         const bool              msaa    = m_context.getRenderTarget().getNumSamples() > 1;
 990         tcu::TestLog&   log             = m_testCtx.getLog();
 991
 992         if (!msaa)
 993         {
 994                 const int               kernelRadius    = 1;
 995                 const int               faultyLimit             = 6;
 996                 int                             faultyPixels;
 997                 tcu::Surface    diffMask                (TEST_CANVAS_SIZE, TEST_CANVAS_SIZE);
 998
 999                 log << TestLog::Message << "Comparing images... " << TestLog::EndMessage;
1000                 log << TestLog::Message << "Deviation within radius of " << kernelRadius << " is allowed." << TestLog::EndMessage;
1001                 log << TestLog::Message << faultyLimit << " faulty pixels are allowed." << TestLog::EndMessage;
1002                 faultyPixels = compareColoredImages(log, testImageAccess, referenceImageAccess, diffMask.getAccess(), kernelRadius);
1003
1004                 if (faultyPixels > faultyLimit)
1005                 {
1006                         log << TestLog::ImageSet("Images", "Image comparison")
1007                                 << TestLog::Image("TestImage", "Test image", testImageAccess)
1008                                 << TestLog::Image("ReferenceImage", "Reference image", referenceImageAccess)
1009                                 << TestLog::Image("DifferenceMask", "Difference mask", diffMask.getAccess())
1010                                 << TestLog::EndImageSet
1011                                 << tcu::TestLog::Message << "Got " << faultyPixels << " faulty pixel(s)." << tcu::TestLog::EndMessage;
1012
1013                         m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "Got faulty pixels");
1014                 }
1015         }
1016         else
1017         {
1018                 const float threshold = 0.3f;
1019                 if (!tcu::fuzzyCompare(log, "Images", "", referenceImageAccess, testImageAccess, threshold, tcu::COMPARE_LOG_ON_ERROR))
1020                         m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "Got faulty pixels");
1021         }
1022 }
1023
1024 class FillTest : public RenderTestCase
1025 {
1026 public:
1027                                                                 FillTest        (Context& context, const char* name, const char* description, const rr::WindowRectangle& viewport);
1028
1029         virtual void                            render          (sglr::Context& ctx) = DE_NULL;
1030         void                                            testRender      (void);
1031
1032 protected:
1033         const rr::WindowRectangle       m_viewport;
1034 };
1035
1036 FillTest::FillTest (Context& context, const char* name, const char* description, const rr::WindowRectangle& viewport)
1037         : RenderTestCase(context, name, description)
1038         , m_viewport    (viewport)
1039 {
1040 }
1041
1042 void FillTest::testRender (void)
1043 {
1044         using tcu::TestLog;
1045
1046         const int                                               numSamples      = 1;
1047
1048         tcu::TestLog&                                   log                     = m_testCtx.getLog();
1049         sglr::GLContext                                 glesContext     (m_context.getRenderContext(), log, 0, tcu::IVec4(0, 0, TEST_CANVAS_SIZE, TEST_CANVAS_SIZE));
1050         sglr::ReferenceContextLimits    limits;
1051         sglr::ReferenceContextBuffers   buffers         (m_context.getRenderTarget().getPixelFormat(), m_context.getRenderTarget().getDepthBits(), 0, TEST_CANVAS_SIZE, TEST_CANVAS_SIZE, numSamples);
1052         sglr::ReferenceContext                  refContext      (limits, buffers.getColorbuffer(), buffers.getDepthbuffer(), buffers.getStencilbuffer());
1053         tcu::Surface                                    testSurface     (TEST_CANVAS_SIZE, TEST_CANVAS_SIZE);
1054         tcu::Surface                                    refSurface      (TEST_CANVAS_SIZE, TEST_CANVAS_SIZE);
1055
1056         render(glesContext);
1057         glesContext.readPixels(testSurface, 0, 0, TEST_CANVAS_SIZE, TEST_CANVAS_SIZE);
1058
1059         render(refContext);
1060         refContext.readPixels(refSurface, 0, 0, TEST_CANVAS_SIZE, TEST_CANVAS_SIZE);
1061
1062         // check overdraw
1063         {
1064                 bool                            overdrawOk;
1065                 tcu::Surface            outputImage(TEST_CANVAS_SIZE, TEST_CANVAS_SIZE);
1066
1067                 log << TestLog::Message << "Checking for overdraw " << TestLog::EndMessage;
1068                 overdrawOk = checkHalfFilledImageOverdraw(log, m_context.getRenderTarget(), testSurface.getAccess(), outputImage.getAccess());
1069
1070                 if (!overdrawOk)
1071                 {
1072                         log << TestLog::ImageSet("Images", "Image comparison")
1073                                 << TestLog::Image("TestImage", "Test image", testSurface.getAccess())
1074                                 << TestLog::Image("InvalidPixels", "Invalid pixels", outputImage.getAccess())
1075                                 << TestLog::EndImageSet
1076                                 << tcu::TestLog::Message << "Got overdraw." << tcu::TestLog::EndMessage;
1077
1078                         m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "Got overdraw");
1079                 }
1080         }
1081
1082         // compare & check missing pixels
1083         {
1084                 const int                       kernelRadius    = 1;
1085                 tcu::Surface            diffMask                (TEST_CANVAS_SIZE, TEST_CANVAS_SIZE);
1086                 int                                     faultyPixels;
1087
1088                 log << TestLog::Message << "Comparing images... " << TestLog::EndMessage;
1089                 log << TestLog::Message << "Deviation within radius of " << kernelRadius << " is allowed." << TestLog::EndMessage;
1090
1091                 blitImageOnBlackSurface(refSurface.getAccess(), refSurface.getAccess()); // makes images look right in Candy
1092
1093                 faultyPixels = compareBlackNonBlackImages(log, testSurface.getAccess(), refSurface.getAccess(), diffMask.getAccess(), kernelRadius);
1094
1095                 if (faultyPixels > 0)
1096                 {
1097                         log << TestLog::ImageSet("Images", "Image comparison")
1098                                 << TestLog::Image("TestImage", "Test image", testSurface.getAccess())
1099                                 << TestLog::Image("ReferenceImage", "Reference image", refSurface.getAccess())
1100                                 << TestLog::Image("DifferenceMask", "Difference mask", diffMask.getAccess())
1101                                 << TestLog::EndImageSet
1102                                 << tcu::TestLog::Message << "Got " << faultyPixels << " faulty pixel(s)." << tcu::TestLog::EndMessage;
1103
1104                         m_testCtx.setTestResult(QP_TEST_RESULT_FAIL, "Got faulty pixels");
1105                 }
1106         }
1107 }
1108
1109 class TriangleFillTest : public FillTest
1110 {
1111 public:
1112         struct FillTriangle
1113         {
1114                 tcu::Vec4 v0;
1115                 tcu::Vec4 c0;
1116                 tcu::Vec4 v1;
1117                 tcu::Vec4 c1;
1118                 tcu::Vec4 v2;
1119                 tcu::Vec4 c2;
1120         };
1121
1122                                                                 TriangleFillTest        (Context& context, const char* name, const char* description, const rr::WindowRectangle& viewport);
1123
1124         void                                            render                          (sglr::Context& ctx);
1125
1126 protected:
1127         std::vector<FillTriangle>       m_triangles;
1128 };
1129
1130 TriangleFillTest::TriangleFillTest (Context& context, const char* name, const char* description, const rr::WindowRectangle& viewport)
1131         : FillTest(context, name, description, viewport)
1132 {
1133 }
1134
1135 void TriangleFillTest::render (sglr::Context& ctx)
1136 {
1137         const int                       verticesPerTriangle             = 3;
1138         PositionColorShader program;
1139         const deUint32          programId                               = ctx.createProgram(&program);
1140         const GLint                     positionLoc                             = ctx.getAttribLocation(programId, "a_position");
1141         const GLint                     colorLoc                                = ctx.getAttribLocation(programId, "a_color");
1142         tcu::TestLog&           log                                             = m_testCtx.getLog();
1143
1144         // log the purpose of the test
1145         log << TestLog::Message << "Viewport: left=" << m_viewport.left << "\tbottom=" << m_viewport.bottom << "\twidth=" << m_viewport.width << "\theight=" << m_viewport.height << TestLog::EndMessage;
1146         log << TestLog::Message << "Rendering triangles. Coordinates:" << TestLog::EndMessage;
1147         for (size_t ndx = 0; ndx < m_triangles.size(); ++ndx)
1148         {
1149                 const std::string v0Properties = genClippingPointInfoString(m_triangles[ndx].v0);
1150                 const std::string v1Properties = genClippingPointInfoString(m_triangles[ndx].v1);
1151                 const std::string v2Properties = genClippingPointInfoString(m_triangles[ndx].v2);
1152
1153                 log << TestLog::Message << "\tv0 (x=" << m_triangles[ndx].v0.x() << "\ty=" << m_triangles[ndx].v0.y() << "\tz=" << m_triangles[ndx].v0.z() << "\tw=" << m_triangles[ndx].v0.w() << ")\t" << v0Properties << TestLog::EndMessage;
1154                 log << TestLog::Message << "\tv1 (x=" << m_triangles[ndx].v1.x() << "\ty=" << m_triangles[ndx].v1.y() << "\tz=" << m_triangles[ndx].v1.z() << "\tw=" << m_triangles[ndx].v1.w() << ")\t" << v1Properties << TestLog::EndMessage;
1155                 log << TestLog::Message << "\tv2 (x=" << m_triangles[ndx].v2.x() << "\ty=" << m_triangles[ndx].v2.y() << "\tz=" << m_triangles[ndx].v2.z() << "\tw=" << m_triangles[ndx].v2.w() << ")\t" << v2Properties << TestLog::EndMessage;
1156                 log << TestLog::Message << TestLog::EndMessage;
1157         }
1158
1159         ctx.clearColor                                  (0, 0, 0, 1);
1160         ctx.clearDepthf                                 (1.0f);
1161         ctx.clear                                               (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
1162         ctx.viewport                                    (m_viewport.left, m_viewport.bottom, m_viewport.width, m_viewport.height);
1163         ctx.useProgram                                  (programId);
1164         ctx.blendFunc                                   (GL_ONE, GL_ONE);
1165         ctx.enable                                              (GL_BLEND);
1166         ctx.enableVertexAttribArray             (positionLoc);
1167         ctx.enableVertexAttribArray             (colorLoc);
1168         ctx.vertexAttribPointer                 (positionLoc,   4, GL_FLOAT, GL_FALSE, sizeof(GLfloat[8]), &m_triangles[0].v0);
1169         ctx.vertexAttribPointer                 (colorLoc,              4, GL_FLOAT, GL_FALSE, sizeof(GLfloat[8]), &m_triangles[0].c0);
1170         ctx.drawArrays                                  (GL_TRIANGLES, 0, verticesPerTriangle * (glw::GLsizei)m_triangles.size());
1171         ctx.disableVertexAttribArray    (positionLoc);
1172         ctx.disableVertexAttribArray    (colorLoc);
1173         ctx.useProgram                                  (0);
1174         ctx.deleteProgram                               (programId);
1175         ctx.finish                                              ();
1176 }
1177
1178 class QuadFillTest : public TriangleFillTest
1179 {
1180 public:
1181         QuadFillTest (Context& context, const char* name, const char* description, const rr::WindowRectangle& viewport, const tcu::Vec3& d1, const tcu::Vec3& d2, const tcu::Vec3& center_ = tcu::Vec3(0, 0, 0));
1182 };
1183
1184 QuadFillTest::QuadFillTest (Context& context, const char* name, const char* description, const rr::WindowRectangle& viewport, const tcu::Vec3& d1, const tcu::Vec3& d2, const tcu::Vec3& center_)
1185         : TriangleFillTest(context, name, description, viewport)
1186 {
1187         const float             radius          = 40000.0f;
1188         const tcu::Vec4 center          = tcu::Vec4(center_.x(), center_.y(), center_.z(), 1.0f);
1189         const tcu::Vec4 halfWhite       = tcu::Vec4(0.5f, 0.5f, 0.5f, 0.5f);
1190         const tcu::Vec4 halfRed         = tcu::Vec4(0.5f, 0.0f, 0.0f, 0.5f);
1191         const tcu::Vec4 e1                      = radius * tcu::Vec4(d1.x(), d1.y(), d1.z(), 0.0f);
1192         const tcu::Vec4 e2                      = radius * tcu::Vec4(d2.x(), d2.y(), d2.z(), 0.0f);
1193
1194         FillTriangle triangle1;
1195         FillTriangle triangle2;
1196
1197         triangle1.c0 = halfWhite;
1198         triangle1.c1 = halfWhite;
1199         triangle1.c2 = halfWhite;
1200         triangle1.v0 = center + e1 + e2;
1201         triangle1.v1 = center + e1 - e2;
1202         triangle1.v2 = center - e1 - e2;
1203         m_triangles.push_back(triangle1);
1204
1205         triangle2.c0 = halfRed;
1206         triangle2.c1 = halfRed;
1207         triangle2.c2 = halfRed;
1208         triangle2.v0 = center + e1 + e2;
1209         triangle2.v1 = center - e1 - e2;
1210         triangle2.v2 = center - e1 + e2;
1211         m_triangles.push_back(triangle2);
1212 }
1213
1214 class TriangleFanFillTest : public TriangleFillTest
1215 {
1216 public:
1217         TriangleFanFillTest (Context& context, const char* name, const char* description, const rr::WindowRectangle& viewport);
1218 };
1219
1220 TriangleFanFillTest::TriangleFanFillTest (Context& context, const char* name, const char* description, const rr::WindowRectangle& viewport)
1221         : TriangleFillTest(context, name, description, viewport)
1222 {
1223         const float             radius                          = 70000.0f;
1224         const int               trianglesPerVisit       = 40;
1225         const tcu::Vec4 center                          = tcu::Vec4(0, 0, 0, 1.0f);
1226         const tcu::Vec4 halfWhite                       = tcu::Vec4(0.5f, 0.5f, 0.5f, 0.5f);
1227         const tcu::Vec4 oddSliceColor           = tcu::Vec4(0.0f, 0.0f, 0.5f, 0.0f);
1228
1229         // create a continuous surface that goes through all 6 clip planes
1230
1231         /*
1232                 *   /           /
1233                 *  /_ _ _ _ _  /x
1234                 * |           |  |
1235                 * |           | /
1236                 * |       / --xe /
1237                 * |      |    | /
1238                 * |_ _ _ e _ _|/
1239                 *
1240                 * e = enter
1241                 * x = exit
1242                 */
1243         const struct ClipPlaneVisit
1244         {
1245                 const tcu::Vec3 corner;
1246                 const tcu::Vec3 entryPoint;
1247                 const tcu::Vec3 exitPoint;
1248         } visits[] =
1249         {
1250                 { tcu::Vec3( 1, 1, 1),  tcu::Vec3( 0, 1, 1),    tcu::Vec3( 1, 0, 1) },
1251                 { tcu::Vec3( 1,-1, 1),  tcu::Vec3( 1, 0, 1),    tcu::Vec3( 1,-1, 0) },
1252                 { tcu::Vec3( 1,-1,-1),  tcu::Vec3( 1,-1, 0),    tcu::Vec3( 0,-1,-1) },
1253                 { tcu::Vec3(-1,-1,-1),  tcu::Vec3( 0,-1,-1),    tcu::Vec3(-1, 0,-1) },
1254                 { tcu::Vec3(-1, 1,-1),  tcu::Vec3(-1, 0,-1),    tcu::Vec3(-1, 1, 0) },
1255                 { tcu::Vec3(-1, 1, 1),  tcu::Vec3(-1, 1, 0),    tcu::Vec3( 0, 1, 1) },
1256         };
1257
1258         for (int ndx = 0; ndx < DE_LENGTH_OF_ARRAY(visits); ++ndx)
1259         {
1260                 const ClipPlaneVisit& visit = visits[ndx];
1261
1262                 for (int tri = 0; tri < trianglesPerVisit; ++tri)
1263                 {
1264                         tcu::Vec3 vertex0;
1265                         tcu::Vec3 vertex1;
1266
1267                         if (tri == 0) // first vertex is magic
1268                         {
1269                                 vertex0 = visit.entryPoint;
1270                         }
1271                         else
1272                         {
1273                                 const tcu::Vec3 v1 = visit.entryPoint - visit.corner;
1274                                 const tcu::Vec3 v2 = visit.exitPoint  - visit.corner;
1275
1276                                 vertex0 = visit.corner + tcu::normalize(tcu::mix(v1, v2, tcu::Vec3(float(tri)/trianglesPerVisit)));
1277                         }
1278
1279                         if (tri == trianglesPerVisit-1) // last vertex is magic
1280                         {
1281                                 vertex1 = visit.exitPoint;
1282                         }
1283                         else
1284                         {
1285                                 const tcu::Vec3 v1 = visit.entryPoint - visit.corner;
1286                                 const tcu::Vec3 v2 = visit.exitPoint  - visit.corner;
1287
1288                                 vertex1 = visit.corner + tcu::normalize(tcu::mix(v1, v2, tcu::Vec3(float(tri+1)/trianglesPerVisit)));
1289                         }
1290
1291                         // write vec out
1292                         {
1293                                 FillTriangle triangle;
1294
1295                                 triangle.c0 = (tri % 2) ? halfWhite : halfWhite + oddSliceColor;
1296                                 triangle.c1 = (tri % 2) ? halfWhite : halfWhite + oddSliceColor;
1297                                 triangle.c2 = (tri % 2) ? halfWhite : halfWhite + oddSliceColor;
1298                                 triangle.v0 = center;
1299                                 triangle.v1 = tcu::Vec4(vertex0.x() * radius, vertex0.y() * radius, vertex0.z() * radius, 1.0f);
1300                                 triangle.v2 = tcu::Vec4(vertex1.x() * radius, vertex1.y() * radius, vertex1.z() * radius, 1.0f);
1301
1302                                 m_triangles.push_back(triangle);
1303                         }
1304
1305                 }
1306         }
1307 }
1308
1309 class PointsTestGroup : public TestCaseGroup
1310 {
1311 public:
1312                         PointsTestGroup (Context& context);
1313
1314         void    init                    (void);
1315 };
1316
1317 PointsTestGroup::PointsTestGroup (Context& context)
1318         : TestCaseGroup(context, "point", "Point clipping tests")
1319 {
1320 }
1321
1322 void PointsTestGroup::init (void)
1323 {
1324         const float littleOverViewport = 1.0f + (2.0f / (TEST_CANVAS_SIZE)); // one pixel over the viewport edge in VIEWPORT_WHOLE, half pixels over in the reduced viewport.
1325
1326         const tcu::Vec4 viewportTestPoints[] =
1327         {
1328                 // in clip volume
1329                 tcu::Vec4( 0.0f,  0.0f,  0.0f,  1.0f),
1330                 tcu::Vec4( 0.1f,  0.1f,  0.1f,  1.0f),
1331                 tcu::Vec4(-0.1f,  0.1f, -0.1f,  1.0f),
1332                 tcu::Vec4(-0.1f, -0.1f,  0.1f,  1.0f),
1333                 tcu::Vec4( 0.1f, -0.1f, -0.1f,  1.0f),
1334
1335                 // in clip volume with w != 1
1336                 tcu::Vec4( 2.0f,  2.0f,  2.0f,  3.0f),
1337                 tcu::Vec4(-2.0f, -2.0f,  2.0f,  3.0f),
1338                 tcu::Vec4( 0.5f, -0.5f,  0.5f,  0.7f),
1339                 tcu::Vec4(-0.5f,  0.5f, -0.5f,  0.7f),
1340
1341                 // near the edge
1342                 tcu::Vec4(-2.0f, -2.0f,  0.0f,  2.2f),
1343                 tcu::Vec4( 1.0f, -1.0f,  0.0f,  1.1f),
1344                 tcu::Vec4(-1.0f,  1.0f,  0.0f,  1.1f),
1345
1346                 // not in the volume but still between near and far planes
1347                 tcu::Vec4( 1.3f,  0.0f,  0.0f,  1.0f),
1348                 tcu::Vec4(-1.3f,  0.0f,  0.0f,  1.0f),
1349                 tcu::Vec4( 0.0f,  1.3f,  0.0f,  1.0f),
1350                 tcu::Vec4( 0.0f, -1.3f,  0.0f,  1.0f),
1351
1352                 tcu::Vec4(-1.3f, -1.3f,  0.0f,  1.0f),
1353                 tcu::Vec4(-1.3f,  1.3f,  0.0f,  1.0f),
1354                 tcu::Vec4( 1.3f,  1.3f,  0.0f,  1.0f),
1355                 tcu::Vec4( 1.3f, -1.3f,  0.0f,  1.0f),
1356
1357                 // outside the viewport, wide points have fragments in the viewport
1358                 tcu::Vec4( littleOverViewport,  littleOverViewport,  0.0f,  1.0f),
1359                 tcu::Vec4(               0.0f,  littleOverViewport,  0.0f,  1.0f),
1360                 tcu::Vec4( littleOverViewport,                0.0f,  0.0f,  1.0f),
1361         };
1362         const tcu::Vec4 depthTestPoints[] =
1363         {
1364                 // in clip volume
1365                 tcu::Vec4( 0.0f,  0.0f,  0.0f,  1.0f),
1366                 tcu::Vec4( 0.1f,  0.1f,  0.1f,  1.0f),
1367                 tcu::Vec4(-0.1f,  0.1f, -0.1f,  1.0f),
1368                 tcu::Vec4(-0.1f, -0.1f,  0.1f,  1.0f),
1369                 tcu::Vec4( 0.1f, -0.1f, -0.1f,  1.0f),
1370
1371                 // not between the near and the far planes. These should be clipped
1372                 tcu::Vec4( 0.1f,  0.0f,  1.1f,  1.0f),
1373                 tcu::Vec4(-0.1f,  0.0f, -1.1f,  1.0f),
1374                 tcu::Vec4(-0.0f, -0.1f,  1.1f,  1.0f),
1375                 tcu::Vec4( 0.0f,  0.1f, -1.1f,  1.0f)
1376         };
1377
1378         addChild(new PointCase(m_context, "point_z_clip",                                               "point z clipping",                             DE_ARRAY_BEGIN(depthTestPoints),        DE_ARRAY_END(depthTestPoints),          1.0f,   VIEWPORT_WHOLE));
1379         addChild(new PointCase(m_context, "point_z_clip_viewport_center",               "point z clipping",                             DE_ARRAY_BEGIN(depthTestPoints),        DE_ARRAY_END(depthTestPoints),          1.0f,   VIEWPORT_CENTER));
1380         addChild(new PointCase(m_context, "point_z_clip_viewport_corner",               "point z clipping",                             DE_ARRAY_BEGIN(depthTestPoints),        DE_ARRAY_END(depthTestPoints),          1.0f,   VIEWPORT_CORNER));
1381
1382         addChild(new PointCase(m_context, "point_clip_viewport_center",                 "point viewport clipping",              DE_ARRAY_BEGIN(viewportTestPoints), DE_ARRAY_END(viewportTestPoints),   1.0f,   VIEWPORT_CENTER));
1383         addChild(new PointCase(m_context, "point_clip_viewport_corner",                 "point viewport clipping",              DE_ARRAY_BEGIN(viewportTestPoints), DE_ARRAY_END(viewportTestPoints),   1.0f,   VIEWPORT_CORNER));
1384
1385         addChild(new PointCase(m_context, "wide_point_z_clip",                                  "point z clipping",                             DE_ARRAY_BEGIN(depthTestPoints),        DE_ARRAY_END(depthTestPoints),          5.0f,   VIEWPORT_WHOLE));
1386         addChild(new PointCase(m_context, "wide_point_z_clip_viewport_center",  "point z clipping",                             DE_ARRAY_BEGIN(depthTestPoints),        DE_ARRAY_END(depthTestPoints),          5.0f,   VIEWPORT_CENTER));
1387         addChild(new PointCase(m_context, "wide_point_z_clip_viewport_corner",  "point z clipping",                             DE_ARRAY_BEGIN(depthTestPoints),        DE_ARRAY_END(depthTestPoints),          5.0f,   VIEWPORT_CORNER));
1388
1389         addChild(new PointCase(m_context, "wide_point_clip",                                    "point viewport clipping",              DE_ARRAY_BEGIN(viewportTestPoints), DE_ARRAY_END(viewportTestPoints),   5.0f,   VIEWPORT_WHOLE));
1390         addChild(new PointCase(m_context, "wide_point_clip_viewport_center",    "point viewport clipping",              DE_ARRAY_BEGIN(viewportTestPoints), DE_ARRAY_END(viewportTestPoints),   5.0f,   VIEWPORT_CENTER));
1391         addChild(new PointCase(m_context, "wide_point_clip_viewport_corner",    "point viewport clipping",              DE_ARRAY_BEGIN(viewportTestPoints), DE_ARRAY_END(viewportTestPoints),   5.0f,   VIEWPORT_CORNER));
1392 }
1393
1394 class LinesTestGroup : public TestCaseGroup
1395 {
1396 public:
1397                         LinesTestGroup  (Context& context);
1398
1399         void    init                    (void);
1400 };
1401
1402 LinesTestGroup::LinesTestGroup (Context& context)
1403         : TestCaseGroup(context, "line", "Line clipping tests")
1404 {
1405 }
1406
1407 void LinesTestGroup::init (void)
1408 {
1409         const float littleOverViewport = 1.0f + (2.0f / (TEST_CANVAS_SIZE)); // one pixel over the viewport edge in VIEWPORT_WHOLE, half pixels over in the reduced viewport.
1410
1411         // lines
1412         const LineRenderTestCase::ColorlessLineData viewportTestLines[] =
1413         {
1414                 // from center to outside of viewport
1415                 {tcu::Vec4( 0.0f,  0.0f,  0.0f,  1.0f),         tcu::Vec4( 0.0f,  1.5f,  0.0f,  1.0f)},
1416                 {tcu::Vec4( 0.0f,  0.0f,  0.0f,  1.0f),         tcu::Vec4(-1.5f,  1.0f,  0.0f,  1.0f)},
1417                 {tcu::Vec4( 0.0f,  0.0f,  0.0f,  1.0f),         tcu::Vec4(-1.5f,  0.0f,  0.0f,  1.0f)},
1418                 {tcu::Vec4( 0.0f,  0.0f,  0.0f,  1.0f),         tcu::Vec4( 0.2f,  0.4f,  1.5f,  1.0f)},
1419                 {tcu::Vec4( 0.0f,  0.0f,  0.0f,  1.0f),         tcu::Vec4(-2.0f, -1.0f,  0.0f,  1.0f)},
1420                 {tcu::Vec4( 0.0f,  0.0f,  0.0f,  1.0f),         tcu::Vec4( 1.0f,  0.1f,  0.0f,  0.6f)},
1421
1422                 // from outside to inside of viewport
1423                 {tcu::Vec4( 1.5f,  0.0f,  0.0f,  1.0f),         tcu::Vec4( 0.8f, -0.2f,  0.0f,  1.0f)},
1424                 {tcu::Vec4( 0.0f, -1.5f,  0.0f,  1.0f),         tcu::Vec4( 0.9f, -0.7f,  0.0f,  1.0f)},
1425
1426                 // from outside to outside
1427                 {tcu::Vec4( 0.0f, -1.3f,  0.0f,  1.0f),         tcu::Vec4( 1.3f,  0.0f,  0.0f,  1.0f)},
1428
1429                 // outside the viewport, wide lines have fragments in the viewport
1430                 {tcu::Vec4(-0.8f,                      -littleOverViewport,  0.0f,  1.0f),      tcu::Vec4( 0.0f, -littleOverViewport,         0.0f,  1.0f)},
1431                 {tcu::Vec4(-littleOverViewport - 1.0f,  0.0f,                0.0f,  1.0f),      tcu::Vec4( 0.0f, -littleOverViewport - 1.0f,  0.0f,  1.0f)},
1432         };
1433         const LineRenderTestCase::ColorlessLineData depthTestLines[] =
1434         {
1435                 {tcu::Vec4( 0.0f,  0.0f,  0.0f,  1.0f),         tcu::Vec4( 1.3f,  1.0f,  2.0f,  1.0f)},
1436                 {tcu::Vec4( 0.0f,  0.0f,  0.0f,  1.0f),         tcu::Vec4( 1.3f, -1.0f,  2.0f,  1.0f)},
1437                 {tcu::Vec4( 0.0f,  0.0f,  0.0f,  1.0f),         tcu::Vec4(-1.0f, -1.1f, -2.0f,  1.0f)},
1438                 {tcu::Vec4( 0.0f,  0.0f,  0.0f,  1.0f),         tcu::Vec4(-1.0f,  1.1f, -2.0f,  1.0f)},
1439                 {tcu::Vec4( 0.0f,  0.0f,  0.0f,  1.0f),         tcu::Vec4( 1.0f,  0.1f,  2.0f,  0.6f)},
1440         };
1441         const LineRenderTestCase::ColorlessLineData longTestLines[] =
1442         {
1443                 {tcu::Vec4( -41000.0f,          -40000.0f,              -1000000.0f,    1.0f),  tcu::Vec4( 41000.0f,            40000.0f,               1000000.0f,     1.0f)},
1444                 {tcu::Vec4(  41000.0f,          -40000.0f,               1000000.0f,    1.0f),  tcu::Vec4(-41000.0f,            40000.0f,          -1000000.0f, 1.0f)},
1445                 {tcu::Vec4(  0.5f,                      -40000.0f,               100000.0f,             1.0f),  tcu::Vec4( 0.5f,                        40000.0f,          -100000.0f,  1.0f)},
1446                 {tcu::Vec4( -0.5f,                       40000.0f,               100000.0f,             1.0f),  tcu::Vec4(-0.5f,                   -40000.0f,      -100000.0f,  1.0f)},
1447         };
1448
1449         // line attribute clipping
1450         const tcu::Vec4 red                     (1.0f, 0.0f, 0.0f, 1.0f);
1451         const tcu::Vec4 yellow          (1.0f, 1.0f, 0.0f, 1.0f);
1452         const tcu::Vec4 lightBlue       (0.3f, 0.3f, 1.0f, 1.0f);
1453         const LineRenderTestCase::ColoredLineData colorTestLines[] =
1454         {
1455                 {tcu::Vec4( 0.0f,  0.0f,  0.0f,  1.0f), red,    tcu::Vec4( 1.3f,  1.0f,  2.0f,  1.0f),  yellow          },
1456                 {tcu::Vec4( 0.0f,  0.0f,  0.0f,  1.0f), red,    tcu::Vec4( 1.3f, -1.0f,  2.0f,  1.0f),  lightBlue       },
1457                 {tcu::Vec4( 0.0f,  0.0f,  0.0f,  1.0f), red,    tcu::Vec4(-1.0f, -1.0f, -2.0f,  1.0f),  yellow          },
1458                 {tcu::Vec4( 0.0f,  0.0f,  0.0f,  1.0f), red,    tcu::Vec4(-1.0f,  1.0f, -2.0f,  1.0f),  lightBlue       },
1459         };
1460
1461         // line clipping
1462         addChild(new LineCase(m_context, "line_z_clip",                                                 "line z clipping",                              DE_ARRAY_BEGIN(depthTestLines),         DE_ARRAY_END(depthTestLines),           1.0f,   VIEWPORT_WHOLE));
1463         addChild(new LineCase(m_context, "line_z_clip_viewport_center",                 "line z clipping",                              DE_ARRAY_BEGIN(depthTestLines),         DE_ARRAY_END(depthTestLines),           1.0f,   VIEWPORT_CENTER));
1464         addChild(new LineCase(m_context, "line_z_clip_viewport_corner",                 "line z clipping",                              DE_ARRAY_BEGIN(depthTestLines),         DE_ARRAY_END(depthTestLines),           1.0f,   VIEWPORT_CORNER));
1465
1466         addChild(new LineCase(m_context, "line_clip_viewport_center",                   "line viewport clipping",               DE_ARRAY_BEGIN(viewportTestLines),      DE_ARRAY_END(viewportTestLines),        1.0f,   VIEWPORT_CENTER));
1467         addChild(new LineCase(m_context, "line_clip_viewport_corner",                   "line viewport clipping",               DE_ARRAY_BEGIN(viewportTestLines),      DE_ARRAY_END(viewportTestLines),        1.0f,   VIEWPORT_CORNER));
1468
1469         addChild(new LineCase(m_context, "wide_line_z_clip",                                    "line z clipping",                              DE_ARRAY_BEGIN(depthTestLines),         DE_ARRAY_END(depthTestLines),           5.0f,   VIEWPORT_WHOLE));
1470         addChild(new LineCase(m_context, "wide_line_z_clip_viewport_center",    "line z clipping",                              DE_ARRAY_BEGIN(depthTestLines),         DE_ARRAY_END(depthTestLines),           5.0f,   VIEWPORT_CENTER));
1471         addChild(new LineCase(m_context, "wide_line_z_clip_viewport_corner",    "line z clipping",                              DE_ARRAY_BEGIN(depthTestLines),         DE_ARRAY_END(depthTestLines),           5.0f,   VIEWPORT_CORNER));
1472
1473         addChild(new LineCase(m_context, "wide_line_clip",                                              "line viewport clipping",               DE_ARRAY_BEGIN(viewportTestLines),      DE_ARRAY_END(viewportTestLines),        5.0f,   VIEWPORT_WHOLE));
1474         addChild(new LineCase(m_context, "wide_line_clip_viewport_center",              "line viewport clipping",               DE_ARRAY_BEGIN(viewportTestLines),      DE_ARRAY_END(viewportTestLines),        5.0f,   VIEWPORT_CENTER));
1475         addChild(new LineCase(m_context, "wide_line_clip_viewport_corner",              "line viewport clipping",               DE_ARRAY_BEGIN(viewportTestLines),      DE_ARRAY_END(viewportTestLines),        5.0f,   VIEWPORT_CORNER));
1476
1477         addChild(new LineCase(m_context, "long_line_clip",                                              "line viewport clipping",               DE_ARRAY_BEGIN(longTestLines),          DE_ARRAY_END(longTestLines),            1.0f,   VIEWPORT_WHOLE, 2));
1478         addChild(new LineCase(m_context, "long_wide_line_clip",                                 "line viewport clipping",               DE_ARRAY_BEGIN(longTestLines),          DE_ARRAY_END(longTestLines),            5.0f,   VIEWPORT_WHOLE, 2));
1479
1480         // line attribute clipping
1481         addChild(new ColoredLineCase(m_context, "line_attrib_clip",                             "line attribute clipping",              DE_ARRAY_BEGIN(colorTestLines),         DE_ARRAY_END(colorTestLines),           1.0f,   VIEWPORT_WHOLE));
1482         addChild(new ColoredLineCase(m_context, "wide_line_attrib_clip",                "line attribute clipping",              DE_ARRAY_BEGIN(colorTestLines),         DE_ARRAY_END(colorTestLines),           5.0f,   VIEWPORT_WHOLE));
1483 }
1484
1485 class PolysTestGroup : public TestCaseGroup
1486 {
1487 public:
1488                         PolysTestGroup  (Context& context);
1489
1490         void    init                    (void);
1491 };
1492
1493 PolysTestGroup::PolysTestGroup (Context& context)
1494         : TestCaseGroup(context, "polygon", "Polygon clipping tests")
1495 {
1496 }
1497
1498 void PolysTestGroup::init (void)
1499 {
1500         const float             large = 100000.0f;
1501         const float             offset = 0.9f;
1502         const tcu::Vec4 white   (1.0f, 1.0f, 1.0f, 1.0f);
1503         const tcu::Vec4 red             (1.0f, 0.0f, 0.0f, 1.0f);
1504         const tcu::Vec4 yellow  (1.0f, 1.0f, 0.0f, 1.0f);
1505         const tcu::Vec4 blue    (0.0f, 0.0f, 1.0f, 1.0f);
1506
1507         // basic cases
1508         {
1509                 const TriangleCase::TriangleData viewportPolys[] =
1510                 {
1511                         // one vertex clipped
1512                         {tcu::Vec4(-0.8f, -0.2f,  0.0f,  1.0f), white, tcu::Vec4(-0.8f,  0.2f,  0.0f,  1.0f), white, tcu::Vec4(-1.3f,  0.05f,  0.0f,  1.0f), white},
1513
1514                         // two vertices clipped
1515                         {tcu::Vec4(-0.6f, -1.2f,  0.0f,  1.0f), white, tcu::Vec4(-1.2f, -0.6f,  0.0f,  1.0f), white, tcu::Vec4(-0.6f, -0.6f,  0.0f,  1.0f), white},
1516
1517                         // three vertices clipped
1518                         {tcu::Vec4(-1.1f,  0.6f,  0.0f,  1.0f), white, tcu::Vec4(-1.1f,  1.1f,  0.0f,  1.0f), white, tcu::Vec4(-0.6f,  1.1f,  0.0f,  1.0f), white},
1519                         {tcu::Vec4( 0.8f,  1.1f,  0.0f,  1.0f), white, tcu::Vec4( 0.95f,-1.1f,  0.0f,  1.0f), white, tcu::Vec4( 3.0f,  0.0f,  0.0f,  1.0f), white},
1520                 };
1521                 const TriangleCase::TriangleData depthPolys[] =
1522                 {
1523                         // one vertex clipped to Z+
1524                         {tcu::Vec4(-0.2f,  0.7f,  0.0f,  1.0f), white, tcu::Vec4( 0.2f,  0.7f,  0.0f,  1.0f), white, tcu::Vec4( 0.0f,  0.9f,  2.0f,  1.0f), white},
1525
1526                         // two vertices clipped to Z-
1527                         {tcu::Vec4( 0.9f, 0.4f,  -1.5f,  1.0f), white, tcu::Vec4( 0.9f, -0.4f, -1.5f,  1.0f), white, tcu::Vec4( 0.6f,  0.0f,  0.0f,  1.0f), white},
1528
1529                         // three vertices clipped
1530                         {tcu::Vec4(-0.9f, 0.6f,  -2.0f,  1.0f), white, tcu::Vec4(-0.9f, -0.6f, -2.0f,  1.0f), white, tcu::Vec4(-0.4f,  0.0f,  2.0f,  1.0f), white},
1531
1532                         // three vertices clipped by X, Y and Z
1533                         {tcu::Vec4( 0.0f, -1.2f,  0.0f,  1.0f), white, tcu::Vec4( 0.0f,  0.5f,  -1.5f, 1.0f), white, tcu::Vec4( 1.2f, -0.9f,  0.0f,  1.0f), white},
1534                 };
1535                 const TriangleCase::TriangleData largePolys[] =
1536                 {
1537                         // one vertex clipped
1538                         {tcu::Vec4(-0.2f,  -0.3f,  0.0f,  1.0f), white, tcu::Vec4( 0.2f, -0.3f,  0.0f,  1.0f), white, tcu::Vec4( 0.0f, -large,  2.0f,  1.0f), white},
1539
1540                         // two vertices clipped
1541                         {tcu::Vec4( 0.5f, 0.5f,  0.0f,  1.0f), white, tcu::Vec4( large, 0.5f, 0.0f,  1.0f), white, tcu::Vec4( 0.5f,  large,  0.0f,  1.0f), white},
1542
1543                         // three vertices clipped
1544                         {tcu::Vec4(-0.9f, -large, 0.0f,  1.0f), white, tcu::Vec4(-1.1f, -large, 0.0f,  1.0f), white, tcu::Vec4(-0.9f,  large,  0.0f,  1.0f), white},
1545                 };
1546                 const TriangleCase::TriangleData largeDepthPolys[] =
1547                 {
1548                         // one vertex clipped
1549                         {tcu::Vec4(-0.2f,  -0.3f,  0.0f,  1.0f), white, tcu::Vec4( 0.2f, -0.3f,  0.0f,  1.0f), white, tcu::Vec4( 0.0f, -large, large,  1.0f), white},
1550
1551                         // two vertices clipped
1552                         {tcu::Vec4( 0.5f, 0.5f,  0.0f,  1.0f), white, tcu::Vec4( 0.9f, large/2, -large,  1.0f), white, tcu::Vec4( large/4, 0.0f, -large,  1.0f), white},
1553
1554                         // three vertices clipped
1555                         {tcu::Vec4(-0.9f, large/4, large,  1.0f), white, tcu::Vec4(-0.5f, -large/4, -large,  1.0f), white, tcu::Vec4(-0.2f, large/4, large,  1.0f), white},
1556                 };
1557                 const TriangleCase::TriangleData attribPolys[] =
1558                 {
1559                         // one vertex clipped to edge, large
1560                         {tcu::Vec4(-0.2f,  -0.3f,  0.0f,  1.0f), red, tcu::Vec4( 0.2f, -0.3f,  0.0f,  1.0f), yellow, tcu::Vec4( 0.0f, -large,  2.0f,  1.0f), blue},
1561
1562                         // two vertices clipped to edges
1563                         {tcu::Vec4( 0.6f,  1.2f,  0.0f,  1.0f), red, tcu::Vec4( 1.2f,  0.6f,  0.0f,  1.0f), yellow, tcu::Vec4( 0.6f,  0.6f,  0.0f,  1.0f), blue},
1564
1565                         // two vertices clipped to edges, with non-uniform w
1566                         {tcu::Vec4( 0.6f, -1.2f,  0.0f,  1.0f), red, tcu::Vec4( 1.2f, -0.6f,  0.0f,  1.0f), yellow, 16.0f*tcu::Vec4( 0.6f, -0.6f,  0.0f,  1.0f), blue},
1567
1568                         // three vertices clipped, large, Z
1569                         {tcu::Vec4(-0.9f, large/4, large,  1.0f), red, tcu::Vec4(-0.5f, -large/4, -large,  1.0f), yellow, tcu::Vec4(-0.2f, large/4, large,  1.0f), blue},
1570                 };
1571
1572                 addChild(new TriangleCase(m_context, "poly_clip_viewport_center",                       "polygon viewport clipping",    DE_ARRAY_BEGIN(viewportPolys),          DE_ARRAY_END(viewportPolys),    VIEWPORT_CENTER));
1573                 addChild(new TriangleCase(m_context, "poly_clip_viewport_corner",                       "polygon viewport clipping",    DE_ARRAY_BEGIN(viewportPolys),          DE_ARRAY_END(viewportPolys),    VIEWPORT_CORNER));
1574
1575                 addChild(new TriangleCase(m_context, "poly_z_clip",                                                     "polygon z clipping",                   DE_ARRAY_BEGIN(depthPolys),                     DE_ARRAY_END(depthPolys),               VIEWPORT_WHOLE));
1576                 addChild(new TriangleCase(m_context, "poly_z_clip_viewport_center",                     "polygon z clipping",                   DE_ARRAY_BEGIN(depthPolys),                     DE_ARRAY_END(depthPolys),               VIEWPORT_CENTER));
1577                 addChild(new TriangleCase(m_context, "poly_z_clip_viewport_corner",                     "polygon z clipping",                   DE_ARRAY_BEGIN(depthPolys),                     DE_ARRAY_END(depthPolys),               VIEWPORT_CORNER));
1578
1579                 addChild(new TriangleCase(m_context, "large_poly_clip_viewport_center",         "polygon viewport clipping",    DE_ARRAY_BEGIN(largePolys),                     DE_ARRAY_END(largePolys),               VIEWPORT_CENTER));
1580                 addChild(new TriangleCase(m_context, "large_poly_clip_viewport_corner",         "polygon viewport clipping",    DE_ARRAY_BEGIN(largePolys),                     DE_ARRAY_END(largePolys),               VIEWPORT_CORNER));
1581
1582                 addChild(new TriangleCase(m_context, "large_poly_z_clip",                                       "polygon z clipping",                   DE_ARRAY_BEGIN(largeDepthPolys),        DE_ARRAY_END(largeDepthPolys),  VIEWPORT_WHOLE));
1583                 addChild(new TriangleCase(m_context, "large_poly_z_clip_viewport_center",       "polygon z clipping",                   DE_ARRAY_BEGIN(largeDepthPolys),        DE_ARRAY_END(largeDepthPolys),  VIEWPORT_CENTER));
1584                 addChild(new TriangleCase(m_context, "large_poly_z_clip_viewport_corner",       "polygon z clipping",                   DE_ARRAY_BEGIN(largeDepthPolys),        DE_ARRAY_END(largeDepthPolys),  VIEWPORT_CORNER));
1585
1586                 addChild(new TriangleAttributeCase(m_context, "poly_attrib_clip",                                       "polygon clipping",             DE_ARRAY_BEGIN(attribPolys),            DE_ARRAY_END(attribPolys),              VIEWPORT_WHOLE));
1587                 addChild(new TriangleAttributeCase(m_context, "poly_attrib_clip_viewport_center",       "polygon clipping",             DE_ARRAY_BEGIN(attribPolys),            DE_ARRAY_END(attribPolys),              VIEWPORT_CENTER));
1588                 addChild(new TriangleAttributeCase(m_context, "poly_attrib_clip_viewport_corner",       "polygon clipping",             DE_ARRAY_BEGIN(attribPolys),            DE_ARRAY_END(attribPolys),              VIEWPORT_CORNER));
1589         }
1590
1591         // multiple polygons
1592         {
1593                 {
1594                         const TriangleAttributeCase::TriangleData polys[] =
1595                         {
1596                                 // one vertex clipped to edge
1597                                 {tcu::Vec4(-0.2f,  -0.3f,  0.0f,  1.0f), red, tcu::Vec4( 0.2f, -0.3f,  0.0f,  1.0f), yellow, tcu::Vec4( 0.0f, -offset,  2.0f,  1.0f), blue},
1598
1599                                 // two vertices clipped to edges
1600                                 {tcu::Vec4( 0.6f,  1.2f,  0.0f,  1.0f), red, tcu::Vec4( 1.2f,  0.6f,  0.0f,  1.0f), yellow, tcu::Vec4( 0.6f,  0.6f,  0.0f,  1.0f), blue},
1601
1602                                 // two vertices clipped to edges, with non-uniform w
1603                                 {tcu::Vec4( 0.6f, -1.2f,  0.0f,  1.0f), red, tcu::Vec4( 1.2f, -0.6f,  0.0f,  1.0f), yellow, 16.0f*tcu::Vec4( 0.6f, -0.6f,  0.0f,  1.0f), blue},
1604                                 {tcu::Vec4( 0.6f,  1.2f,  0.0f,  1.0f), red, tcu::Vec4( 1.2f,  0.6f,  0.0f,  1.0f), yellow, 16.0f*tcu::Vec4( 0.6f,  0.6f,  0.0f,  1.0f), blue},
1605                                 {tcu::Vec4(-0.6f,  1.2f,  0.0f,  1.0f), red, tcu::Vec4(-1.2f,  0.6f,  0.0f,  1.0f), yellow, 16.0f*tcu::Vec4(-0.6f,  0.6f,  0.0f,  1.0f), blue},
1606                                 {tcu::Vec4(-0.6f, -1.2f,  0.0f,  1.0f), red, tcu::Vec4(-1.2f, -0.6f,  0.0f,  1.0f), yellow, 16.0f*tcu::Vec4(-0.6f, -0.6f,  0.0f,  1.0f), blue},
1607
1608                                 // three vertices clipped, Z
1609                                 {tcu::Vec4(-0.9f, offset/4, offset,  1.0f), red, tcu::Vec4(-0.5f, -offset/4, -offset,  1.0f), yellow, tcu::Vec4(-0.2f, offset/4, offset,  1.0f), blue},
1610                         };
1611
1612                         addChild(new TriangleAttributeCase(m_context, "multiple_0",                                     "polygon clipping",             DE_ARRAY_BEGIN(polys),          DE_ARRAY_END(polys),            VIEWPORT_WHOLE));
1613                         addChild(new TriangleAttributeCase(m_context, "multiple_0_viewport_center",     "polygon clipping",             DE_ARRAY_BEGIN(polys),          DE_ARRAY_END(polys),            VIEWPORT_CENTER));
1614                         addChild(new TriangleAttributeCase(m_context, "multiple_0_viewport_corner",     "polygon clipping",             DE_ARRAY_BEGIN(polys),          DE_ARRAY_END(polys),            VIEWPORT_CORNER));
1615                 }
1616
1617                 {
1618                         const TriangleAttributeCase::TriangleData polys[] =
1619                         {
1620                                 // one vertex clipped to z
1621                                 {tcu::Vec4(-0.2f,  -0.3f,  0.0f,  1.0f), red, tcu::Vec4( 0.2f, -0.3f,  0.0f,  1.0f), yellow, tcu::Vec4( 0.0f, -offset,  2.0f,  1.0f), blue},
1622
1623                                 // two vertices clipped to edges
1624                                 {tcu::Vec4( 0.6f,  1.2f,  0.0f,  1.0f), red, tcu::Vec4( 1.2f,  0.6f,  0.0f,  1.0f), yellow, tcu::Vec4( 0.6f,  0.6f,  0.0f,  1.0f), blue},
1625
1626                                 // two vertices clipped to edges, with non-uniform w
1627                                 {tcu::Vec4( 0.6f, -1.2f,  0.0f,  1.0f), red, tcu::Vec4( 1.2f, -0.6f,  0.0f,  1.0f), yellow, 16.0f*tcu::Vec4( 0.6f, -0.6f,  0.0f,  1.0f), blue},
1628                                 {tcu::Vec4( 0.6f,  1.2f,  0.0f,  1.0f), red, tcu::Vec4( 1.2f,  0.6f,  0.0f,  1.0f), yellow, 16.0f*tcu::Vec4( 0.6f,  0.6f,  0.0f,  1.0f), blue},
1629                                 {tcu::Vec4(-0.6f,  1.2f,  0.0f,  1.0f), red, tcu::Vec4(-1.2f,  0.6f,  0.0f,  1.0f), yellow, 16.0f*tcu::Vec4(-0.6f,  0.6f,  0.0f,  1.0f), blue},
1630                                 {tcu::Vec4(-0.6f, -1.2f,  0.0f,  1.0f), red, tcu::Vec4(-1.2f, -0.6f,  0.0f,  1.0f), yellow, 16.0f*tcu::Vec4(-0.6f, -0.6f,  0.0f,  1.0f), blue},
1631                         };
1632
1633                         addChild(new TriangleAttributeCase(m_context, "multiple_1",                                     "polygon clipping",             DE_ARRAY_BEGIN(polys),          DE_ARRAY_END(polys),            VIEWPORT_WHOLE));
1634                         addChild(new TriangleAttributeCase(m_context, "multiple_1_viewport_center",     "polygon clipping",             DE_ARRAY_BEGIN(polys),          DE_ARRAY_END(polys),            VIEWPORT_CENTER));
1635                         addChild(new TriangleAttributeCase(m_context, "multiple_1_viewport_corner",     "polygon clipping",             DE_ARRAY_BEGIN(polys),          DE_ARRAY_END(polys),            VIEWPORT_CORNER));
1636                 }
1637
1638                 {
1639                         const TriangleAttributeCase::TriangleData polys[] =
1640                         {
1641                                 // one vertex clipped to z
1642                                 {tcu::Vec4(-0.2f,  -0.3f,  0.0f,  1.0f), red, tcu::Vec4( 0.2f, -0.3f,  0.0f,  1.0f), yellow, tcu::Vec4( 0.0f, -offset,  2.0f,  1.0f), blue},
1643
1644                                 // two vertices clipped to edges
1645                                 {tcu::Vec4( 0.6f,  1.2f,  0.0f,  1.0f), red, tcu::Vec4( 1.2f,  0.6f,  0.0f,  1.0f), yellow, tcu::Vec4( 0.6f,  0.6f,  0.0f,  1.0f), blue},
1646
1647                                 // two vertices clipped to edges
1648                                 {tcu::Vec4( 0.6f, -1.2f,  0.0f,  1.0f), red, tcu::Vec4( 1.2f, -0.6f,  0.0f,  1.0f), yellow, tcu::Vec4( 0.6f, -0.6f,  0.0f,  1.0f), blue},
1649                                 {tcu::Vec4( 0.6f,  1.2f,  0.0f,  1.0f), red, tcu::Vec4( 1.2f,  0.6f,  0.0f,  1.0f), yellow, tcu::Vec4( 0.6f,  0.6f,  0.0f,  1.0f), blue},
1650                                 {tcu::Vec4(-0.6f,  1.2f,  0.0f,  1.0f), red, tcu::Vec4(-1.2f,  0.6f,  0.0f,  1.0f), yellow, tcu::Vec4(-0.6f,  0.6f,  0.0f,  1.0f), blue},
1651                                 {tcu::Vec4(-0.6f, -1.2f,  0.0f,  1.0f), red, tcu::Vec4(-1.2f, -0.6f,  0.0f,  1.0f), yellow, tcu::Vec4(-0.6f, -0.6f,  0.0f,  1.0f), blue},
1652                         };
1653
1654                         addChild(new TriangleAttributeCase(m_context, "multiple_2",                                     "polygon clipping",             DE_ARRAY_BEGIN(polys),          DE_ARRAY_END(polys),            VIEWPORT_WHOLE));
1655                         addChild(new TriangleAttributeCase(m_context, "multiple_2_viewport_center",     "polygon clipping",             DE_ARRAY_BEGIN(polys),          DE_ARRAY_END(polys),            VIEWPORT_CENTER));
1656                         addChild(new TriangleAttributeCase(m_context, "multiple_2_viewport_corner",     "polygon clipping",             DE_ARRAY_BEGIN(polys),          DE_ARRAY_END(polys),            VIEWPORT_CORNER));
1657                 }
1658
1659                 {
1660                         const TriangleAttributeCase::TriangleData polys[] =
1661                         {
1662                                 // one vertex clipped to z
1663                                 {tcu::Vec4(-0.2f,  -0.3f,  0.0f,  1.0f), red, tcu::Vec4( 0.2f, -0.3f,  0.0f,  1.0f), yellow, tcu::Vec4( 0.0f, -offset, -2.0f,  1.0f), blue},
1664
1665                                 // two vertices clipped to edges
1666                                 {tcu::Vec4( 0.6f, -1.2f,  0.0f,  1.0f), red, tcu::Vec4( 1.2f, -0.6f,  0.0f,  1.0f), yellow, tcu::Vec4( 0.6f, -0.6f,  0.0f,  1.0f), blue},
1667                                 {tcu::Vec4( 0.6f,  1.2f,  0.0f,  1.0f), red, tcu::Vec4( 1.2f,  0.6f,  0.0f,  1.0f), yellow, tcu::Vec4( 0.6f,  0.6f,  0.0f,  1.0f), blue},
1668                                 {tcu::Vec4(-0.6f,  1.2f,  0.0f,  1.0f), red, tcu::Vec4(-1.2f,  0.6f,  0.0f,  1.0f), yellow, tcu::Vec4(-0.6f,  0.6f,  0.0f,  1.0f), blue},
1669                                 {tcu::Vec4(-0.6f, -1.2f,  0.0f,  1.0f), red, tcu::Vec4(-1.2f, -0.6f,  0.0f,  1.0f), yellow, tcu::Vec4(-0.6f, -0.6f,  0.0f,  1.0f), blue},
1670                         };
1671
1672                         addChild(new TriangleAttributeCase(m_context, "multiple_3",                                     "polygon clipping",             DE_ARRAY_BEGIN(polys),          DE_ARRAY_END(polys),            VIEWPORT_WHOLE));
1673                         addChild(new TriangleAttributeCase(m_context, "multiple_3_viewport_center",     "polygon clipping",             DE_ARRAY_BEGIN(polys),          DE_ARRAY_END(polys),            VIEWPORT_CENTER));
1674                         addChild(new TriangleAttributeCase(m_context, "multiple_3_viewport_corner",     "polygon clipping",             DE_ARRAY_BEGIN(polys),          DE_ARRAY_END(polys),            VIEWPORT_CORNER));
1675                 }
1676
1677                 {
1678                         const TriangleAttributeCase::TriangleData polys[] =
1679                         {
1680                                 // one vertex clipped to z
1681                                 {tcu::Vec4(0.3f,  0.2f,  0.0f,  1.0f), red, tcu::Vec4( 0.3f, -0.2f,  0.0f,  1.0f), yellow, tcu::Vec4( offset, 0.0f,  2.0f,  1.0f), blue},
1682
1683                                 // two vertices clipped to edges
1684                                 {tcu::Vec4( 0.6f, -1.2f,  0.0f,  1.0f), red, tcu::Vec4( 1.2f, -0.6f,  0.0f,  1.0f), yellow, tcu::Vec4( 0.6f, -0.6f,  0.0f,  1.0f), blue},
1685                                 {tcu::Vec4( 0.6f,  1.2f,  0.0f,  1.0f), red, tcu::Vec4( 1.2f,  0.6f,  0.0f,  1.0f), yellow, tcu::Vec4( 0.6f,  0.6f,  0.0f,  1.0f), blue},
1686                                 {tcu::Vec4(-0.6f,  1.2f,  0.0f,  1.0f), red, tcu::Vec4(-1.2f,  0.6f,  0.0f,  1.0f), yellow, tcu::Vec4(-0.6f,  0.6f,  0.0f,  1.0f), blue},
1687                                 {tcu::Vec4(-0.6f, -1.2f,  0.0f,  1.0f), red, tcu::Vec4(-1.2f, -0.6f,  0.0f,  1.0f), yellow, tcu::Vec4(-0.6f, -0.6f,  0.0f,  1.0f), blue},
1688                         };
1689
1690                         addChild(new TriangleAttributeCase(m_context, "multiple_4",                                     "polygon clipping",             DE_ARRAY_BEGIN(polys),          DE_ARRAY_END(polys),            VIEWPORT_WHOLE));
1691                         addChild(new TriangleAttributeCase(m_context, "multiple_4_viewport_center",     "polygon clipping",             DE_ARRAY_BEGIN(polys),          DE_ARRAY_END(polys),            VIEWPORT_CENTER));
1692                         addChild(new TriangleAttributeCase(m_context, "multiple_4_viewport_corner",     "polygon clipping",             DE_ARRAY_BEGIN(polys),          DE_ARRAY_END(polys),            VIEWPORT_CORNER));
1693                 }
1694
1695                 {
1696                         const TriangleAttributeCase::TriangleData polys[] =
1697                         {
1698                                 // one vertex clipped to z
1699                                 {tcu::Vec4(-0.3f,  0.2f,  0.0f,  1.0f), red, tcu::Vec4(-0.3f, -0.2f,  0.0f,  1.0f), yellow, tcu::Vec4(-offset, 0.0f,  2.0f,  1.0f), blue},
1700
1701                                 // two vertices clipped to edges
1702                                 {tcu::Vec4( 0.6f, -1.2f,  0.0f,  1.0f), red, tcu::Vec4( 1.2f, -0.6f,  0.0f,  1.0f), yellow, tcu::Vec4( 0.6f, -0.6f,  0.0f,  1.0f), blue},
1703                                 {tcu::Vec4( 0.6f,  1.2f,  0.0f,  1.0f), red, tcu::Vec4( 1.2f,  0.6f,  0.0f,  1.0f), yellow, tcu::Vec4( 0.6f,  0.6f,  0.0f,  1.0f), blue},
1704                                 {tcu::Vec4(-0.6f,  1.2f,  0.0f,  1.0f), red, tcu::Vec4(-1.2f,  0.6f,  0.0f,  1.0f), yellow, tcu::Vec4(-0.6f,  0.6f,  0.0f,  1.0f), blue},
1705                                 {tcu::Vec4(-0.6f, -1.2f,  0.0f,  1.0f), red, tcu::Vec4(-1.2f, -0.6f,  0.0f,  1.0f), yellow, tcu::Vec4(-0.6f, -0.6f,  0.0f,  1.0f), blue},
1706                         };
1707
1708                         addChild(new TriangleAttributeCase(m_context, "multiple_5",                                     "polygon clipping",             DE_ARRAY_BEGIN(polys),          DE_ARRAY_END(polys),            VIEWPORT_WHOLE));
1709                         addChild(new TriangleAttributeCase(m_context, "multiple_5_viewport_center",     "polygon clipping",             DE_ARRAY_BEGIN(polys),          DE_ARRAY_END(polys),            VIEWPORT_CENTER));
1710                         addChild(new TriangleAttributeCase(m_context, "multiple_5_viewport_corner",     "polygon clipping",             DE_ARRAY_BEGIN(polys),          DE_ARRAY_END(polys),            VIEWPORT_CORNER));
1711                 }
1712
1713                 {
1714                         const TriangleAttributeCase::TriangleData polys[] =
1715                         {
1716                                 // one vertex clipped to z
1717                                 {tcu::Vec4(-0.2f,  0.3f,  0.0f,  1.0f), red, tcu::Vec4( 0.2f, 0.3f,  0.0f,  1.0f), yellow, tcu::Vec4( 0.0f, offset,  2.0f,  1.0f), blue},
1718
1719                                 // two vertices clipped to edges
1720                                 {tcu::Vec4( 0.6f, -1.2f,  0.0f,  1.0f), red, tcu::Vec4( 1.2f, -0.6f,  0.0f,  1.0f), yellow, tcu::Vec4( 0.6f, -0.6f,  0.0f,  1.0f), blue},
1721                                 {tcu::Vec4( 0.6f,  1.2f,  0.0f,  1.0f), red, tcu::Vec4( 1.2f,  0.6f,  0.0f,  1.0f), yellow, tcu::Vec4( 0.6f,  0.6f,  0.0f,  1.0f), blue},
1722                                 {tcu::Vec4(-0.6f,  1.2f,  0.0f,  1.0f), red, tcu::Vec4(-1.2f,  0.6f,  0.0f,  1.0f), yellow, tcu::Vec4(-0.6f,  0.6f,  0.0f,  1.0f), blue},
1723                                 {tcu::Vec4(-0.6f, -1.2f,  0.0f,  1.0f), red, tcu::Vec4(-1.2f, -0.6f,  0.0f,  1.0f), yellow, tcu::Vec4(-0.6f, -0.6f,  0.0f,  1.0f), blue},
1724                         };
1725
1726                         addChild(new TriangleAttributeCase(m_context, "multiple_6",                                     "polygon clipping",             DE_ARRAY_BEGIN(polys),          DE_ARRAY_END(polys),            VIEWPORT_WHOLE));
1727                         addChild(new TriangleAttributeCase(m_context, "multiple_6_viewport_center",     "polygon clipping",             DE_ARRAY_BEGIN(polys),          DE_ARRAY_END(polys),            VIEWPORT_CENTER));
1728                         addChild(new TriangleAttributeCase(m_context, "multiple_6_viewport_corner",     "polygon clipping",             DE_ARRAY_BEGIN(polys),          DE_ARRAY_END(polys),            VIEWPORT_CORNER));
1729                 }
1730
1731                 {
1732                         const TriangleAttributeCase::TriangleData polys[] =
1733                         {
1734                                 // two vertices clipped to edges
1735                                 {tcu::Vec4( 0.6f,  1.2f,  0.0f,  1.0f), red, tcu::Vec4( 1.2f,  0.6f,  0.0f,  1.0f), yellow, tcu::Vec4( 0.6f,  0.6f,  0.0f,  1.0f), blue},
1736
1737                                 // two vertices clipped to edges
1738                                 {tcu::Vec4( 0.6f, -1.2f,  0.0f,  1.0f), red, tcu::Vec4( 1.2f, -0.6f,  0.0f,  1.0f), yellow, tcu::Vec4( 0.6f, -0.6f,  0.0f,  1.0f), blue},
1739                                 {tcu::Vec4( 0.6f,  1.2f,  0.0f,  1.0f), red, tcu::Vec4( 1.2f,  0.6f,  0.0f,  1.0f), yellow, tcu::Vec4( 0.6f,  0.6f,  0.0f,  1.0f), blue},
1740                                 {tcu::Vec4(-0.6f,  1.2f,  0.0f,  1.0f), red, tcu::Vec4(-1.2f,  0.6f,  0.0f,  1.0f), yellow, tcu::Vec4(-0.6f,  0.6f,  0.0f,  1.0f), blue},
1741                                 {tcu::Vec4(-0.6f, -1.2f,  0.0f,  1.0f), red, tcu::Vec4(-1.2f, -0.6f,  0.0f,  1.0f), yellow, tcu::Vec4(-0.6f, -0.6f,  0.0f,  1.0f), blue},
1742                         };
1743
1744                         addChild(new TriangleAttributeCase(m_context, "multiple_7",                                     "polygon clipping",             DE_ARRAY_BEGIN(polys),          DE_ARRAY_END(polys),            VIEWPORT_WHOLE));
1745                         addChild(new TriangleAttributeCase(m_context, "multiple_7_viewport_center",     "polygon clipping",             DE_ARRAY_BEGIN(polys),          DE_ARRAY_END(polys),            VIEWPORT_CENTER));
1746                         addChild(new TriangleAttributeCase(m_context, "multiple_7_viewport_corner",     "polygon clipping",             DE_ARRAY_BEGIN(polys),          DE_ARRAY_END(polys),            VIEWPORT_CORNER));
1747                 }
1748
1749                 {
1750                         const TriangleAttributeCase::TriangleData polys[] =
1751                         {
1752                                 // one vertex clipped to z
1753                                 {tcu::Vec4(-0.2f,  -0.3f,  0.0f,  1.0f), red, tcu::Vec4( 0.2f, -0.3f,  0.0f,  1.0f), yellow, tcu::Vec4( 0.0f, -offset,  2.0f,  1.0f), blue},
1754
1755                                 // fill
1756                                 {tcu::Vec4( -1.0f, -1.0f,  0.0f,  1.0f), white, tcu::Vec4( 1.0f, -1.0f,  0.0f,  1.0f), white, tcu::Vec4( -1.0f, 1.0f,  0.0f,  1.0f), white},
1757                                 {tcu::Vec4( -1.0f,  1.0f,  0.0f,  1.0f), blue,  tcu::Vec4( 1.0f, -1.0f,  0.0f,  1.0f), blue, tcu::Vec4(  1.0f, 1.0f,  0.0f,  1.0f), blue},
1758                         };
1759
1760                         addChild(new TriangleAttributeCase(m_context, "multiple_8",                                     "polygon clipping",             DE_ARRAY_BEGIN(polys),          DE_ARRAY_END(polys),            VIEWPORT_WHOLE));
1761                         addChild(new TriangleAttributeCase(m_context, "multiple_8_viewport_center",     "polygon clipping",             DE_ARRAY_BEGIN(polys),          DE_ARRAY_END(polys),            VIEWPORT_CENTER));
1762                         addChild(new TriangleAttributeCase(m_context, "multiple_8_viewport_corner",     "polygon clipping",             DE_ARRAY_BEGIN(polys),          DE_ARRAY_END(polys),            VIEWPORT_CORNER));
1763                 }
1764
1765                 {
1766                         const TriangleAttributeCase::TriangleData polys[] =
1767                         {
1768                                 // one vertex clipped to z
1769                                 {tcu::Vec4(-0.2f,  -0.3f,  0.0f,  1.0f), red, tcu::Vec4( 0.2f, -0.3f,  0.0f,  1.0f), yellow, tcu::Vec4( 0.0f, -offset,  2.0f,  1.0f), blue},
1770
1771                                 // fill
1772                                 {tcu::Vec4( -1.0f,  1.0f,  0.0f,  1.0f), red,  tcu::Vec4( 1.0f, -1.0f,  0.0f,  1.0f), red,  tcu::Vec4(  1.0f, 1.0f,  0.0f,  1.0f), red},
1773                                 {tcu::Vec4( -1.0f, -1.0f,  0.0f,  1.0f), blue, tcu::Vec4( 1.0f, -1.0f,  0.0f,  1.0f), blue, tcu::Vec4( -1.0f, 1.0f,  0.0f,  1.0f), blue},
1774                         };
1775
1776                         addChild(new TriangleAttributeCase(m_context, "multiple_9",                                     "polygon clipping",             DE_ARRAY_BEGIN(polys),          DE_ARRAY_END(polys),            VIEWPORT_WHOLE));
1777                         addChild(new TriangleAttributeCase(m_context, "multiple_9_viewport_center",     "polygon clipping",             DE_ARRAY_BEGIN(polys),          DE_ARRAY_END(polys),            VIEWPORT_CENTER));
1778                         addChild(new TriangleAttributeCase(m_context, "multiple_9_viewport_corner",     "polygon clipping",             DE_ARRAY_BEGIN(polys),          DE_ARRAY_END(polys),            VIEWPORT_CORNER));
1779                 }
1780
1781                 {
1782                         const TriangleAttributeCase::TriangleData polys[] =
1783                         {
1784                                 // one vertex clipped to z
1785                                 {tcu::Vec4(-0.2f,  -0.3f,  0.0f,  1.0f), red, tcu::Vec4( 0.2f, -0.3f,  0.0f,  1.0f), yellow, tcu::Vec4( 0.0f, -offset,  2.0f,  1.0f), blue},
1786
1787                                 // fill
1788                                 {tcu::Vec4( -1.0f, -1.0f,  0.0f,  1.0f), white, tcu::Vec4( 1.0f, -1.0f,  0.0f,  1.0f), white, tcu::Vec4( -1.0f, 1.0f,  0.0f,  1.0f), white},
1789                                 {tcu::Vec4( -1.0f,  1.0f,  0.0f,  1.0f), red,   tcu::Vec4( 1.0f, -1.0f,  0.0f,  1.0f), red,   tcu::Vec4(  1.0f, 1.0f,  0.0f,  1.0f), red},
1790                                 {tcu::Vec4( -1.0f, -1.0f,  0.0f,  1.0f), blue,  tcu::Vec4( 1.0f, -1.0f,  0.0f,  1.0f), blue,  tcu::Vec4( -1.0f, 1.0f,  0.0f,  1.0f), blue},
1791                         };
1792
1793                         addChild(new TriangleAttributeCase(m_context, "multiple_10",                                    "polygon clipping",             DE_ARRAY_BEGIN(polys),          DE_ARRAY_END(polys),            VIEWPORT_WHOLE));
1794                         addChild(new TriangleAttributeCase(m_context, "multiple_10_viewport_center",    "polygon clipping",             DE_ARRAY_BEGIN(polys),          DE_ARRAY_END(polys),            VIEWPORT_CENTER));
1795                         addChild(new TriangleAttributeCase(m_context, "multiple_10_viewport_corner",    "polygon clipping",             DE_ARRAY_BEGIN(polys),          DE_ARRAY_END(polys),            VIEWPORT_CORNER));
1796                 }
1797
1798                 {
1799                         const TriangleAttributeCase::TriangleData polys[] =
1800                         {
1801                                 // one vertex clipped to z
1802                                 {tcu::Vec4(-0.2f,  -0.3f,  0.0f,  1.0f), red, tcu::Vec4( 0.2f, -0.3f,  0.0f,  1.0f), yellow, tcu::Vec4( 0.0f, -offset,  2.0f,  1.0f), blue},
1803
1804                                 // fill
1805                                 {tcu::Vec4( -1.0f, -1.0f,  0.0f,  1.0f), white,  tcu::Vec4( 1.0f, -1.0f,  0.0f,  1.0f), white,  tcu::Vec4( -1.0f, 1.0f,  0.0f,  1.0f), white},
1806                                 {tcu::Vec4( -1.0f,  1.0f,  0.0f,  1.0f), red,    tcu::Vec4( 1.0f, -1.0f,  0.0f,  1.0f), red,    tcu::Vec4(  1.0f, 1.0f,  0.0f,  1.0f), red},
1807                                 {tcu::Vec4( -1.0f, -1.0f,  0.0f,  1.0f), blue,   tcu::Vec4( 1.0f, -1.0f,  0.0f,  1.0f), blue,   tcu::Vec4( -1.0f, 1.0f,  0.0f,  1.0f), blue},
1808                                 {tcu::Vec4( -1.0f,  1.0f,  0.0f,  1.0f), yellow, tcu::Vec4( 1.0f, -1.0f,  0.0f,  1.0f), yellow, tcu::Vec4(  1.0f, 1.0f,  0.0f,  1.0f), yellow},
1809                         };
1810
1811                         addChild(new TriangleAttributeCase(m_context, "multiple_11",                                    "polygon clipping",             DE_ARRAY_BEGIN(polys),          DE_ARRAY_END(polys),            VIEWPORT_WHOLE));
1812                         addChild(new TriangleAttributeCase(m_context, "multiple_11_viewport_center",    "polygon clipping",             DE_ARRAY_BEGIN(polys),          DE_ARRAY_END(polys),            VIEWPORT_CENTER));
1813                         addChild(new TriangleAttributeCase(m_context, "multiple_11_viewport_corner",    "polygon clipping",             DE_ARRAY_BEGIN(polys),          DE_ARRAY_END(polys),            VIEWPORT_CORNER));
1814                 }
1815         }
1816 }
1817
1818 class PolyEdgesTestGroup : public TestCaseGroup
1819 {
1820 public:
1821                         PolyEdgesTestGroup      (Context& context);
1822
1823         void    init                            (void);
1824 };
1825
1826 PolyEdgesTestGroup::PolyEdgesTestGroup (Context& context)
1827         : TestCaseGroup(context, "polygon_edge", "Polygon clipping edge tests")
1828 {
1829 }
1830
1831 void PolyEdgesTestGroup::init (void)
1832 {
1833         // Quads via origin
1834         const struct Quad
1835         {
1836                 tcu::Vec3 d1; // tangent
1837                 tcu::Vec3 d2; // bi-tangent
1838         } quads[] =
1839         {
1840                 { tcu::Vec3( 1, 1, 1),  tcu::Vec3( 1,   -1, 1) },
1841                 { tcu::Vec3( 1, 1, 1),  tcu::Vec3(-1, 1.1f, 1) },
1842                 { tcu::Vec3( 1, 1, 0),  tcu::Vec3(-1,    1, 0) },
1843                 { tcu::Vec3( 0, 1, 0),  tcu::Vec3( 1,    0, 0) },
1844                 { tcu::Vec3( 0, 1, 0),  tcu::Vec3( 1, 0.1f, 0) },
1845         };
1846
1847         // Quad near edge
1848         const struct EdgeQuad
1849         {
1850                 tcu::Vec3 d1;           // tangent
1851                 tcu::Vec3 d2;           // bi-tangent
1852                 tcu::Vec3 center;       // center
1853         } edgeQuads[] =
1854         {
1855                 { tcu::Vec3( 1,     0.01f, 0    ),      tcu::Vec3( 0,      0.01f,  0),  tcu::Vec3( 0,     0.99f, 0    ) }, // edge near x-plane
1856                 { tcu::Vec3( 0.01f, 1,     0    ),      tcu::Vec3( 0.01f,  0,      0),  tcu::Vec3( 0.99f, 0,     0    ) }, // edge near y-plane
1857                 { tcu::Vec3( 1,     1,     0.01f),      tcu::Vec3( 0.01f,  -0.01f, 0),  tcu::Vec3( 0,     0,     0.99f) }, // edge near z-plane
1858         };
1859
1860         for (int ndx = 0; ndx < DE_LENGTH_OF_ARRAY(quads); ++ndx)
1861                 addChild(new QuadFillTest(m_context, (std::string("quad_at_origin_") + de::toString(ndx)).c_str(), "polygon edge clipping", VIEWPORT_CENTER, quads[ndx].d1, quads[ndx].d2));
1862         for (int ndx = 0; ndx < DE_LENGTH_OF_ARRAY(edgeQuads); ++ndx)
1863                 addChild(new QuadFillTest(m_context, (std::string("quad_near_edge_") + de::toString(ndx)).c_str(), "polygon edge clipping", VIEWPORT_CENTER, edgeQuads[ndx].d1, edgeQuads[ndx].d2, edgeQuads[ndx].center));
1864
1865         // Polyfan
1866         addChild(new TriangleFanFillTest(m_context, "poly_fan", "polygon edge clipping", VIEWPORT_CENTER));
1867 }
1868
1869 class PolyVertexClipTestGroup : public TestCaseGroup
1870 {
1871 public:
1872                         PolyVertexClipTestGroup (Context& context);
1873
1874         void    init                                    (void);
1875 };
1876
1877 PolyVertexClipTestGroup::PolyVertexClipTestGroup (Context& context)
1878         : TestCaseGroup(context, "triangle_vertex", "Clip n vertices")
1879 {
1880 }
1881
1882 void PolyVertexClipTestGroup::init (void)
1883 {
1884         const float far                                 = 30000.0f;
1885         const float farForThreeVertex   = 20000.0f; // 3 vertex clipping tests use smaller triangles
1886         const tcu::IVec3 outside[] =
1887         {
1888                 // outside one clipping plane
1889                 tcu::IVec3(-1,  0,  0),
1890                 tcu::IVec3( 1,  0,  0),
1891                 tcu::IVec3( 0,  1,  0),
1892                 tcu::IVec3( 0, -1,  0),
1893                 tcu::IVec3( 0,  0,  1),
1894                 tcu::IVec3( 0,  0, -1),
1895
1896                 // outside two clipping planes
1897                 tcu::IVec3(-1, -1,  0),
1898                 tcu::IVec3( 1, -1,  0),
1899                 tcu::IVec3( 1,  1,  0),
1900                 tcu::IVec3(-1,  1,  0),
1901
1902                 tcu::IVec3(-1,  0, -1),
1903                 tcu::IVec3( 1,  0, -1),
1904                 tcu::IVec3( 1,  0,  1),
1905                 tcu::IVec3(-1,  0,  1),
1906
1907                 tcu::IVec3( 0, -1, -1),
1908                 tcu::IVec3( 0,  1, -1),
1909                 tcu::IVec3( 0,  1,  1),
1910                 tcu::IVec3( 0, -1,  1),
1911
1912                 // outside three clipping planes
1913                 tcu::IVec3(-1, -1,  1),
1914                 tcu::IVec3( 1, -1,  1),
1915                 tcu::IVec3( 1,  1,  1),
1916                 tcu::IVec3(-1,  1,  1),
1917
1918                 tcu::IVec3(-1, -1, -1),
1919                 tcu::IVec3( 1, -1, -1),
1920                 tcu::IVec3( 1,  1, -1),
1921                 tcu::IVec3(-1,  1, -1),
1922         };
1923
1924         de::Random rnd(0xabcdef);
1925
1926         TestCaseGroup* clipOne          = new TestCaseGroup(m_context, "clip_one",              "Clip one vertex");
1927         TestCaseGroup* clipTwo          = new TestCaseGroup(m_context, "clip_two",              "Clip two vertices");
1928         TestCaseGroup* clipThree        = new TestCaseGroup(m_context, "clip_three",    "Clip three vertices");
1929
1930         addChild(clipOne);
1931         addChild(clipTwo);
1932         addChild(clipThree);
1933
1934         // Test 1 point clipped
1935         for (int ndx = 0; ndx < DE_LENGTH_OF_ARRAY(outside); ++ndx)
1936         {
1937                 const float             w0              = rnd.getFloat(0.2f, 16.0f);
1938                 const float             w1              = rnd.getFloat(0.2f, 16.0f);
1939                 const float             w2              = rnd.getFloat(0.2f, 16.0f);
1940                 const tcu::Vec4 white   = tcu::Vec4(    1,          1,  1,      1);
1941                 const tcu::Vec3 r0              = tcu::Vec3( 0.2f,       0.3f,  0);
1942                 const tcu::Vec3 r1              = tcu::Vec3(-0.3f,      -0.4f,  0);
1943                 const tcu::Vec3 r2              = IVec3ToVec3(outside[ndx]) * far;
1944                 const tcu::Vec4 p0              = tcu::Vec4(r0.x() * w0, r0.y() * w0, r0.z() * w0, w0);
1945                 const tcu::Vec4 p1              = tcu::Vec4(r1.x() * w1, r1.y() * w1, r1.z() * w1, w1);
1946                 const tcu::Vec4 p2              = tcu::Vec4(r2.x() * w2, r2.y() * w2, r2.z() * w2, w2);
1947
1948                 const std::string name  = std::string("clip") +
1949                         (outside[ndx].x() > 0 ? "_pos_x" : (outside[ndx].x() < 0 ? "_neg_x" : "")) +
1950                         (outside[ndx].y() > 0 ? "_pos_y" : (outside[ndx].y() < 0 ? "_neg_y" : "")) +
1951                         (outside[ndx].z() > 0 ? "_pos_z" : (outside[ndx].z() < 0 ? "_neg_z" : ""));
1952
1953                 const TriangleCase::TriangleData triangle =     {p0, white, p1, white, p2, white};
1954
1955                 // don't try to test with degenerate (or almost degenerate) triangles
1956                 if (outside[ndx].x() == 0 && outside[ndx].y() == 0)
1957                         continue;
1958
1959                 clipOne->addChild(new TriangleCase(m_context, name.c_str(), "clip one vertex", &triangle, &triangle + 1, VIEWPORT_CENTER));
1960         }
1961
1962         // Special triangles for "clip_z" cases, default triangles is not good, since it has very small visible area => problems with MSAA
1963         {
1964                 const tcu::Vec4 white = tcu::Vec4(1.0f, 1.0f, 1.0f, 1.0f);
1965
1966                 const TriangleCase::TriangleData posZTriangle =
1967                 {
1968                         tcu::Vec4( 0.0f, -0.7f, -0.9f, 1.0f), white,
1969                         tcu::Vec4( 0.8f,  0.0f, -0.7f, 1.0f), white,
1970                         tcu::Vec4(-0.9f,  0.9f,  3.0f, 1.0f), white
1971                 };
1972                 const TriangleCase::TriangleData negZTriangle =
1973                 {
1974                         tcu::Vec4( 0.0f, -0.7f,  0.9f, 1.0f), white,
1975                         tcu::Vec4( 0.4f,  0.0f,  0.7f, 1.0f), white,
1976                         tcu::Vec4(-0.9f,  0.9f, -3.0f, 1.0f), white
1977                 };
1978
1979                 clipOne->addChild(new TriangleCase(m_context, "clip_pos_z", "clip one vertex", &posZTriangle, &posZTriangle + 1, VIEWPORT_CENTER));
1980                 clipOne->addChild(new TriangleCase(m_context, "clip_neg_z", "clip one vertex", &negZTriangle, &negZTriangle + 1, VIEWPORT_CENTER));
1981         }
1982
1983         // Test 2 points clipped
1984         for (int ndx1 = 0; ndx1 < DE_LENGTH_OF_ARRAY(outside); ++ndx1)
1985         for (int ndx2 = ndx1 + 1; ndx2 < DE_LENGTH_OF_ARRAY(outside); ++ndx2)
1986         {
1987                 const float             w0              = rnd.getFloat(0.2f, 16.0f);
1988                 const float             w1              = rnd.getFloat(0.2f, 16.0f);
1989                 const float             w2              = rnd.getFloat(0.2f, 16.0f);
1990                 const tcu::Vec4 white   = tcu::Vec4(    1,          1,  1,      1);
1991                 const tcu::Vec3 r0              = tcu::Vec3( 0.2f,       0.3f,  0);
1992                 const tcu::IVec3 r1             = outside[ndx1];
1993                 const tcu::IVec3 r2             = outside[ndx2];
1994                 const tcu::Vec4 p0              = tcu::Vec4(r0.x() * w0, r0.y() * w0, r0.z() * w0, w0);
1995                 const tcu::Vec4 p1              = tcu::Vec4(float(r1.x()) * far * w1, float(r1.y()) * far * w1, float(r1.z()) * far * w1, w1);
1996                 const tcu::Vec4 p2              = tcu::Vec4(float(r2.x()) * far * w2, float(r2.y()) * far * w2, float(r2.z()) * far * w2, w2);
1997
1998                 const std::string name  = std::string("clip") +
1999                         (outside[ndx1].x() > 0 ? "_pos_x" : (outside[ndx1].x() < 0 ? "_neg_x" : "")) +
2000                         (outside[ndx1].y() > 0 ? "_pos_y" : (outside[ndx1].y() < 0 ? "_neg_y" : "")) +
2001                         (outside[ndx1].z() > 0 ? "_pos_z" : (outside[ndx1].z() < 0 ? "_neg_z" : "")) +
2002                         "_and" +
2003                         (outside[ndx2].x() > 0 ? "_pos_x" : (outside[ndx2].x() < 0 ? "_neg_x" : "")) +
2004                         (outside[ndx2].y() > 0 ? "_pos_y" : (outside[ndx2].y() < 0 ? "_neg_y" : "")) +
2005                         (outside[ndx2].z() > 0 ? "_pos_z" : (outside[ndx2].z() < 0 ? "_neg_z" : ""));
2006
2007                 const TriangleCase::TriangleData triangle =     {p0, white, p1, white, p2, white};
2008
2009                 if (twoPointClippedTriangleInvisible(r0, r1, r2))
2010                         continue;
2011
2012                 clipTwo->addChild(new TriangleCase(m_context, name.c_str(), "clip two vertices", &triangle, &triangle + 1, VIEWPORT_CENTER));
2013         }
2014
2015         // Test 3 points clipped
2016         for (int ndx1 = 0; ndx1 < DE_LENGTH_OF_ARRAY(outside); ++ndx1)
2017         for (int ndx2 = ndx1 + 1; ndx2 < DE_LENGTH_OF_ARRAY(outside); ++ndx2)
2018         for (int ndx3 = ndx2 + 1; ndx3 < DE_LENGTH_OF_ARRAY(outside); ++ndx3)
2019         {
2020                 const float             w0              = rnd.getFloat(0.2f, 16.0f);
2021                 const float             w1              = rnd.getFloat(0.2f, 16.0f);
2022                 const float             w2              = rnd.getFloat(0.2f, 16.0f);
2023                 const tcu::Vec4 white   = tcu::Vec4(1, 1, 1, 1);
2024                 const tcu::IVec3 r0             = outside[ndx1];
2025                 const tcu::IVec3 r1             = outside[ndx2];
2026                 const tcu::IVec3 r2             = outside[ndx3];
2027                 const tcu::Vec4 p0              = tcu::Vec4(float(r0.x()) * farForThreeVertex * w0, float(r0.y()) * farForThreeVertex * w0, float(r0.z()) * farForThreeVertex * w0, w0);
2028                 const tcu::Vec4 p1              = tcu::Vec4(float(r1.x()) * farForThreeVertex * w1, float(r1.y()) * farForThreeVertex * w1, float(r1.z()) * farForThreeVertex * w1, w1);
2029                 const tcu::Vec4 p2              = tcu::Vec4(float(r2.x()) * farForThreeVertex * w2, float(r2.y()) * farForThreeVertex * w2, float(r2.z()) * farForThreeVertex * w2, w2);
2030
2031                 // ignore cases where polygon is along xz or yz planes
2032                 if (pointsOnLine(r0.swizzle(0, 1), r1.swizzle(0, 1), r2.swizzle(0, 1)))
2033                         continue;
2034
2035                 // triangle is visible only if it intersects the origin
2036                 if (pointOnTriangle(tcu::IVec3(0, 0, 0), r0, r1, r2))
2037                 {
2038                         const TriangleCase::TriangleData triangle =     {p0, white, p1, white, p2, white};
2039                         const std::string name  = std::string("clip") +
2040                                 (outside[ndx1].x() > 0 ? "_pos_x" : (outside[ndx1].x() < 0 ? "_neg_x" : "")) +
2041                                 (outside[ndx1].y() > 0 ? "_pos_y" : (outside[ndx1].y() < 0 ? "_neg_y" : "")) +
2042                                 (outside[ndx1].z() > 0 ? "_pos_z" : (outside[ndx1].z() < 0 ? "_neg_z" : "")) +
2043                                 "_and" +
2044                                 (outside[ndx2].x() > 0 ? "_pos_x" : (outside[ndx2].x() < 0 ? "_neg_x" : "")) +
2045                                 (outside[ndx2].y() > 0 ? "_pos_y" : (outside[ndx2].y() < 0 ? "_neg_y" : "")) +
2046                                 (outside[ndx2].z() > 0 ? "_pos_z" : (outside[ndx2].z() < 0 ? "_neg_z" : "")) +
2047                                 "_and" +
2048                                 (outside[ndx3].x() > 0 ? "_pos_x" : (outside[ndx3].x() < 0 ? "_neg_x" : "")) +
2049                                 (outside[ndx3].y() > 0 ? "_pos_y" : (outside[ndx3].y() < 0 ? "_neg_y" : "")) +
2050                                 (outside[ndx3].z() > 0 ? "_pos_z" : (outside[ndx3].z() < 0 ? "_neg_z" : ""));
2051
2052                         clipThree->addChild(new TriangleCase(m_context, name.c_str(), "clip three vertices", &triangle, &triangle + 1, VIEWPORT_CENTER));
2053                 }
2054         }
2055 }
2056
2057 } // anonymous
2058
2059 ClippingTests::ClippingTests (Context& context)
2060         : TestCaseGroup(context, "clipping", "Clipping tests")
2061 {
2062 }
2063
2064 ClippingTests::~ClippingTests (void)
2065 {
2066 }
2067
2068 void ClippingTests::init (void)
2069 {
2070         addChild(new PointsTestGroup            (m_context));
2071         addChild(new LinesTestGroup                     (m_context));
2072         addChild(new PolysTestGroup                     (m_context));
2073         addChild(new PolyEdgesTestGroup         (m_context));
2074         addChild(new PolyVertexClipTestGroup(m_context));
2075 }
2076
2077 } // Functional
2078 } // gles2
2079 } // deqp