framework/platform/win32/tcuWGL.cpp

   1 /*-------------------------------------------------------------------------
   2  * drawElements Quality Program Tester Core
   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 WGL Utilities.
  22  *//*--------------------------------------------------------------------*/
  23
  24 #include "tcuWGL.hpp"
  25 #include "tcuWin32Window.hpp"
  26 #include "deDynamicLibrary.hpp"
  27 #include "deMemory.h"
  28 #include "deStringUtil.hpp"
  29 #include "tcuFormatUtil.hpp"
  30 #include "gluRenderConfig.hpp"
  31
  32 #include <WinGDI.h>
  33
  34 // WGL_ARB_pixel_format
  35 #define WGL_NUMBER_PIXEL_FORMATS_ARB                            0x2000
  36 #define WGL_DRAW_TO_WINDOW_ARB                                          0x2001
  37 #define WGL_DRAW_TO_BITMAP_ARB                                          0x2002
  38 #define WGL_ACCELERATION_ARB                                            0x2003
  39 #define WGL_NEED_PALETTE_ARB                                            0x2004
  40 #define WGL_NEED_SYSTEM_PALETTE_ARB                                     0x2005
  41 #define WGL_SWAP_LAYER_BUFFERS_ARB                                      0x2006
  42 #define WGL_SWAP_METHOD_ARB                                                     0x2007
  43 #define WGL_NUMBER_OVERLAYS_ARB                                         0x2008
  44 #define WGL_NUMBER_UNDERLAYS_ARB                                        0x2009
  45 #define WGL_TRANSPARENT_ARB                                                     0x200A
  46 #define WGL_TRANSPARENT_RED_VALUE_ARB                           0x2037
  47 #define WGL_TRANSPARENT_GREEN_VALUE_ARB                         0x2038
  48 #define WGL_TRANSPARENT_BLUE_VALUE_ARB                          0x2039
  49 #define WGL_TRANSPARENT_ALPHA_VALUE_ARB                         0x203A
  50 #define WGL_TRANSPARENT_INDEX_VALUE_ARB                         0x203B
  51 #define WGL_SHARE_DEPTH_ARB                                                     0x200C
  52 #define WGL_SHARE_STENCIL_ARB                                           0x200D
  53 #define WGL_SHARE_ACCUM_ARB                                                     0x200E
  54 #define WGL_SUPPORT_GDI_ARB                                                     0x200F
  55 #define WGL_SUPPORT_OPENGL_ARB                                          0x2010
  56 #define WGL_DOUBLE_BUFFER_ARB                                           0x2011
  57 #define WGL_STEREO_ARB                                                          0x2012
  58 #define WGL_PIXEL_TYPE_ARB                                                      0x2013
  59 #define WGL_COLOR_BITS_ARB                                                      0x2014
  60 #define WGL_RED_BITS_ARB                                                        0x2015
  61 #define WGL_RED_SHIFT_ARB                                                       0x2016
  62 #define WGL_GREEN_BITS_ARB                                                      0x2017
  63 #define WGL_GREEN_SHIFT_ARB                                                     0x2018
  64 #define WGL_BLUE_BITS_ARB                                                       0x2019
  65 #define WGL_BLUE_SHIFT_ARB                                                      0x201A
  66 #define WGL_ALPHA_BITS_ARB                                                      0x201B
  67 #define WGL_ALPHA_SHIFT_ARB                                                     0x201C
  68 #define WGL_ACCUM_BITS_ARB                                                      0x201D
  69 #define WGL_ACCUM_RED_BITS_ARB                                          0x201E
  70 #define WGL_ACCUM_GREEN_BITS_ARB                                        0x201F
  71 #define WGL_ACCUM_BLUE_BITS_ARB                                         0x2020
  72 #define WGL_ACCUM_ALPHA_BITS_ARB                                        0x2021
  73 #define WGL_DEPTH_BITS_ARB                                                      0x2022
  74 #define WGL_STENCIL_BITS_ARB                                            0x2023
  75 #define WGL_AUX_BUFFERS_ARB                                                     0x2024
  76
  77 #define WGL_NO_ACCELERATION_ARB                                         0x2025
  78 #define WGL_GENERIC_ACCELERATION_ARB                            0x2026
  79 #define WGL_FULL_ACCELERATION_ARB                                       0x2027
  80
  81 #define WGL_TYPE_RGBA_ARB                                                       0x202B
  82 #define WGL_TYPE_COLORINDEX_ARB                                         0x202C
  83
  84 // WGL_ARB_color_buffer_float
  85 #define WGL_TYPE_RGBA_FLOAT_ARB                                         0x21A0
  86
  87 // WGL_EXT_pixel_type_packed_float
  88 #define WGL_TYPE_RGBA_UNSIGNED_FLOAT_EXT                        0x20A8
  89
  90 // WGL_ARB_multisample
  91 #define WGL_SAMPLE_BUFFERS_ARB                                          0x2041
  92 #define WGL_SAMPLES_ARB                                                         0x2042
  93
  94 // WGL_ARB_create_context
  95 #define WGL_CONTEXT_MAJOR_VERSION_ARB                           0x2091
  96 #define WGL_CONTEXT_MINOR_VERSION_ARB                           0x2092
  97 #define WGL_CONTEXT_LAYER_PLANE_ARB                                     0x2093
  98 #define WGL_CONTEXT_FLAGS_ARB                                           0x2094
  99 #define WGL_CONTEXT_PROFILE_MASK_ARB                            0x9126
 100 #define WGL_CONTEXT_DEBUG_BIT_ARB                                       0x0001
 101 #define WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB          0x0002
 102 #define WGL_CONTEXT_CORE_PROFILE_BIT_ARB                        0x00000001
 103 #define WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB       0x00000002
 104 #define WGL_CONTEXT_ES_PROFILE_BIT_EXT                          0x00000004
 105
 106 // WGL_ARB_create_context_robustness
 107 #define WGL_CONTEXT_ROBUST_ACCESS_BIT_ARB                       0x0004
 108 #define WGL_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB     0x8256
 109 #define WGL_NO_RESET_NOTIFICATION_ARB                           0x8261
 110 #define WGL_LOSE_CONTEXT_ON_RESET_ARB                           0x8252
 111
 112 DE_BEGIN_EXTERN_C
 113
 114 // WGL core
 115 typedef HGLRC   (WINAPI* wglCreateContextFunc)                          (HDC hdc);
 116 typedef BOOL    (WINAPI* wglDeleteContextFunc)                          (HGLRC hglrc);
 117 typedef BOOL    (WINAPI* wglMakeCurrentFunc)                            (HDC hdc, HGLRC hglrc);
 118 typedef PROC    (WINAPI* wglGetProcAddressFunc)                         (LPCSTR lpszProc);
 119 typedef BOOL    (WINAPI* wglSwapLayerBuffersFunc)                       (HDC dhc, UINT fuPlanes);
 120
 121 // WGL_ARB_pixel_format
 122 typedef BOOL    (WINAPI* wglGetPixelFormatAttribivARBFunc)      (HDC hdc, int iPixelFormat, int iLayerPlane, UINT nAttributes, const int *piAttributes, int *piValues);
 123 typedef BOOL    (WINAPI* wglGetPixelFormatAttribfvARBFunc)      (HDC hdc, int iPixelFormat, int iLayerPlane, UINT nAttributes, const int *piAttributes, FLOAT *pfValues);
 124 typedef BOOL    (WINAPI* wglChoosePixelFormatARBFunc)           (HDC hdc, const int *piAttribIList, const FLOAT *pfAttribFList, UINT nMaxFormats, int *piFormats, UINT *nNumFormats);
 125
 126 // WGL_ARB_create_context
 127 typedef HGLRC   (WINAPI* wglCreateContextAttribsARBFunc)        (HDC hdc, HGLRC hshareContext, const int* attribList);
 128
 129 DE_END_EXTERN_C
 130
 131 namespace tcu
 132 {
 133 namespace wgl
 134 {
 135
 136 // Functions
 137
 138 struct Functions
 139 {
 140         // Core
 141         wglCreateContextFunc                            createContext;
 142         wglDeleteContextFunc                            deleteContext;
 143         wglMakeCurrentFunc                                      makeCurrent;
 144         wglGetProcAddressFunc                           getProcAddress;
 145         wglSwapLayerBuffersFunc                         swapLayerBuffers;
 146
 147         // WGL_ARB_pixel_format
 148         wglGetPixelFormatAttribivARBFunc        getPixelFormatAttribivARB;
 149         wglGetPixelFormatAttribfvARBFunc        getPixelFormatAttribfvARB;
 150         wglChoosePixelFormatARBFunc                     choosePixelFormatARB;
 151
 152         // WGL_ARB_create_context
 153         wglCreateContextAttribsARBFunc          createContextAttribsARB;
 154
 155         Functions (void)
 156                 : createContext                         (DE_NULL)
 157                 , deleteContext                         (DE_NULL)
 158                 , makeCurrent                           (DE_NULL)
 159                 , getProcAddress                        (DE_NULL)
 160                 , swapLayerBuffers                      (DE_NULL)
 161                 , getPixelFormatAttribivARB     (DE_NULL)
 162                 , getPixelFormatAttribfvARB     (DE_NULL)
 163                 , choosePixelFormatARB          (DE_NULL)
 164                 , createContextAttribsARB       (DE_NULL)
 165         {
 166         }
 167 };
 168
 169 // Library
 170
 171 class Library
 172 {
 173 public:
 174                                                                 Library                 (HINSTANCE instance);
 175                                                                 ~Library                (void);
 176
 177         const Functions&                        getFunctions    (void) const    { return m_functions;   }
 178         const de::DynamicLibrary&       getGLLibrary    (void) const    { return m_library;             }
 179
 180 private:
 181         de::DynamicLibrary                      m_library;
 182         Functions                                       m_functions;
 183 };
 184
 185 Library::Library (HINSTANCE instance)
 186         : m_library("opengl32.dll")
 187 {
 188         // Temporary 1x1 window for creating context
 189         win32::Window tmpWindow(instance, 1, 1);
 190
 191         // Load WGL core.
 192         m_functions.createContext               = (wglCreateContextFunc)                m_library.getFunction("wglCreateContext");
 193         m_functions.deleteContext               = (wglDeleteContextFunc)                m_library.getFunction("wglDeleteContext");
 194         m_functions.getProcAddress              = (wglGetProcAddressFunc)               m_library.getFunction("wglGetProcAddress");
 195         m_functions.makeCurrent                 = (wglMakeCurrentFunc)                  m_library.getFunction("wglMakeCurrent");
 196         m_functions.swapLayerBuffers    = (wglSwapLayerBuffersFunc)             m_library.getFunction("wglSwapLayerBuffers");
 197
 198         if (!m_functions.createContext          ||
 199                 !m_functions.deleteContext              ||
 200                 !m_functions.getProcAddress             ||
 201                 !m_functions.makeCurrent                ||
 202                 !m_functions.swapLayerBuffers)
 203                 throw ResourceError("Failed to load core WGL functions");
 204
 205         {
 206                 PIXELFORMATDESCRIPTOR pixelFormatDesc;
 207                 deMemset(&pixelFormatDesc, 0, sizeof(pixelFormatDesc));
 208
 209                 pixelFormatDesc.nSize                   = sizeof(pixelFormatDesc);
 210                 pixelFormatDesc.nVersion                = 1;
 211                 pixelFormatDesc.dwFlags                 = PFD_DRAW_TO_WINDOW | PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
 212                 pixelFormatDesc.iPixelType              = PFD_TYPE_RGBA;
 213                 pixelFormatDesc.iLayerType              = PFD_MAIN_PLANE;
 214
 215                 int pixelFormat = ChoosePixelFormat(tmpWindow.getDeviceContext(), &pixelFormatDesc);
 216                 if (!SetPixelFormat(tmpWindow.getDeviceContext(), pixelFormat, &pixelFormatDesc))
 217                         throw ResourceError("Failed to set pixel format for temporary context creation");
 218         }
 219
 220         // Create temporary context for loading extension functions.
 221         HGLRC tmpCtx = m_functions.createContext(tmpWindow.getDeviceContext());
 222         if (!tmpCtx || !m_functions.makeCurrent(tmpWindow.getDeviceContext(), tmpCtx))
 223         {
 224                 if (tmpCtx)
 225                         m_functions.deleteContext(tmpCtx);
 226                 throw ResourceError("Failed to create temporary WGL context");
 227         }
 228
 229         // WGL_ARB_pixel_format
 230         m_functions.getPixelFormatAttribivARB   = (wglGetPixelFormatAttribivARBFunc)m_functions.getProcAddress("wglGetPixelFormatAttribivARB");
 231         m_functions.getPixelFormatAttribfvARB   = (wglGetPixelFormatAttribfvARBFunc)m_functions.getProcAddress("wglGetPixelFormatAttribfvARB");
 232         m_functions.choosePixelFormatARB                = (wglChoosePixelFormatARBFunc)m_functions.getProcAddress("wglChoosePixelFormatARB");
 233
 234         // WGL_ARB_create_context
 235         m_functions.createContextAttribsARB             = (wglCreateContextAttribsARBFunc)m_functions.getProcAddress("wglCreateContextAttribsARB");
 236
 237         m_functions.makeCurrent(tmpWindow.getDeviceContext(), NULL);
 238         m_functions.deleteContext(tmpCtx);
 239
 240         if (!m_functions.getPixelFormatAttribivARB      ||
 241                 !m_functions.getPixelFormatAttribfvARB  ||
 242                 !m_functions.choosePixelFormatARB               ||
 243                 !m_functions.createContextAttribsARB)
 244                 throw ResourceError("Failed to load WGL extension functions");
 245 }
 246
 247 Library::~Library (void)
 248 {
 249 }
 250
 251 // Core
 252
 253 Core::Core (HINSTANCE instance)
 254         : m_library(new Library(instance))
 255 {
 256 }
 257
 258 Core::~Core (void)
 259 {
 260         delete m_library;
 261 }
 262
 263 std::vector<int> Core::getPixelFormats (HDC deviceCtx) const
 264 {
 265         const Functions& wgl = m_library->getFunctions();
 266
 267         int attribs[] = { WGL_NUMBER_PIXEL_FORMATS_ARB };
 268         int values[DE_LENGTH_OF_ARRAY(attribs)];
 269
 270         if (!wgl.getPixelFormatAttribivARB(deviceCtx, 0, 0, DE_LENGTH_OF_ARRAY(attribs), &attribs[0], &values[0]))
 271                 throw ResourceError("Failed to query number of WGL pixel formats");
 272
 273         // \todo [2013-04-14 pyry] Do we need to filter values at all?
 274         std::vector<int> pixelFormats(values[0]);
 275         for (int i = 0; i < values[0]; i++)
 276                 pixelFormats[i] = i+1;
 277
 278         return pixelFormats;
 279 }
 280
 281 static PixelFormatInfo::Acceleration translateAcceleration (int accel)
 282 {
 283         switch (accel)
 284         {
 285                 case WGL_NO_ACCELERATION_ARB:           return PixelFormatInfo::ACCELERATION_NONE;
 286                 case WGL_GENERIC_ACCELERATION_ARB:      return PixelFormatInfo::ACCELERATION_GENERIC;
 287                 case WGL_FULL_ACCELERATION_ARB:         return PixelFormatInfo::ACCELERATION_FULL;
 288                 default:                                                        return PixelFormatInfo::ACCELERATION_UNKNOWN;
 289         }
 290 }
 291
 292 static PixelFormatInfo::PixelType translatePixelType (int type)
 293 {
 294         switch (type)
 295         {
 296                 case WGL_TYPE_RGBA_ARB:                                 return PixelFormatInfo::PIXELTYPE_RGBA;
 297                 case WGL_TYPE_RGBA_FLOAT_ARB:                   return PixelFormatInfo::PIXELTYPE_RGBA_FLOAT;
 298                 case WGL_TYPE_RGBA_UNSIGNED_FLOAT_EXT:  return PixelFormatInfo::PIXELTYPE_RGBA_UNSIGNED_FLOAT;
 299                 case WGL_TYPE_COLORINDEX_ARB:                   return PixelFormatInfo::PIXELTYPE_COLOR_INDEX;
 300                 default:                                                                return PixelFormatInfo::PIXELTYPE_UNKNOWN;
 301         }
 302 }
 303
 304 PixelFormatInfo Core::getPixelFormatInfo (HDC deviceCtx, int pixelFormat) const
 305 {
 306         const Functions& wgl = m_library->getFunctions();
 307
 308         int attribs     [14];
 309         int values      [DE_LENGTH_OF_ARRAY(attribs)];
 310         attribs[0]      = WGL_DRAW_TO_WINDOW_ARB;
 311         attribs[1]      = WGL_DRAW_TO_BITMAP_ARB;
 312         attribs[2]      = WGL_ACCELERATION_ARB;
 313         attribs[3]      = WGL_SUPPORT_OPENGL_ARB;
 314         attribs[4]      = WGL_DOUBLE_BUFFER_ARB;
 315         attribs[5]      = WGL_PIXEL_TYPE_ARB;
 316         attribs[6]      = WGL_RED_BITS_ARB;
 317         attribs[7]      = WGL_GREEN_BITS_ARB;
 318         attribs[8]      = WGL_BLUE_BITS_ARB;
 319         attribs[9]      = WGL_ALPHA_BITS_ARB;
 320         attribs[10]     = WGL_DEPTH_BITS_ARB;
 321         attribs[11]     = WGL_STENCIL_BITS_ARB;
 322         attribs[12]     = WGL_SAMPLE_BUFFERS_ARB;
 323         attribs[13]     = WGL_SAMPLES_ARB;
 324
 325         deMemset(&values[0], 0, sizeof(values));
 326         if (!wgl.getPixelFormatAttribivARB(deviceCtx, pixelFormat, 0, DE_LENGTH_OF_ARRAY(attribs), &attribs[0], &values[0]))
 327                 throw ResourceError("Pixel format query failed");
 328
 329         // Translate values.
 330         PixelFormatInfo info;
 331
 332         info.pixelFormat        = pixelFormat;
 333         info.surfaceTypes       |= (values[0] ? PixelFormatInfo::SURFACE_WINDOW : 0);
 334         info.surfaceTypes       |= (values[1] ? PixelFormatInfo::SURFACE_PIXMAP : 0);
 335         info.acceleration       = translateAcceleration(values[2]);
 336         info.supportOpenGL      = values[3] != 0;
 337         info.doubleBuffer       = values[4] != 0;
 338         info.pixelType          = translatePixelType(values[5]);
 339         info.redBits            = values[6];
 340         info.greenBits          = values[7];
 341         info.blueBits           = values[8];
 342         info.alphaBits          = values[9];
 343         info.depthBits          = values[10];
 344         info.stencilBits        = values[11];
 345         info.sampleBuffers      = values[12];
 346         info.samples            = values[13];
 347
 348         return info;
 349 }
 350
 351 // Context
 352
 353 Context::Context (const Core* core, HDC deviceCtx, glu::ContextType ctxType, int pixelFormat)
 354         : m_core                (core)
 355         , m_deviceCtx   (deviceCtx)
 356         , m_context             (0)
 357 {
 358         const Functions& wgl = core->getLibrary()->getFunctions();
 359
 360         // Map context type & flags.
 361         int     profileBit      = 0;
 362         int     flags           = 0;
 363
 364         switch (ctxType.getProfile())
 365         {
 366                 case glu::PROFILE_CORE:
 367                         profileBit = WGL_CONTEXT_CORE_PROFILE_BIT_ARB;
 368                         break;
 369
 370                 case glu::PROFILE_ES:
 371                         profileBit = WGL_CONTEXT_ES_PROFILE_BIT_EXT;
 372                         break;
 373
 374                 case glu::PROFILE_COMPATIBILITY:
 375                         profileBit = WGL_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB;
 376                         break;
 377
 378                 default:
 379                         throw NotSupportedError("Unsupported context type for WGL");
 380         }
 381
 382         if ((ctxType.getFlags() & glu::CONTEXT_FORWARD_COMPATIBLE) != 0)
 383                 flags |= WGL_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB;
 384
 385         if ((ctxType.getFlags() & glu::CONTEXT_DEBUG) != 0)
 386                 flags |= WGL_CONTEXT_DEBUG_BIT_ARB;
 387
 388         if ((ctxType.getFlags() & glu::CONTEXT_ROBUST) != 0)
 389                 flags |= WGL_CONTEXT_ROBUST_ACCESS_BIT_ARB;
 390
 391         const int attribList[] =
 392         {
 393                 WGL_CONTEXT_MAJOR_VERSION_ARB,  ctxType.getMajorVersion(),
 394                 WGL_CONTEXT_MINOR_VERSION_ARB,  ctxType.getMinorVersion(),
 395                 WGL_CONTEXT_PROFILE_MASK_ARB,   profileBit,
 396                 WGL_CONTEXT_FLAGS_ARB,                  flags,
 397                 0
 398         };
 399
 400         // Set pixel format
 401         {
 402                 PIXELFORMATDESCRIPTOR pixelFormatDesc;
 403                 deMemset(&pixelFormatDesc, 0, sizeof(pixelFormatDesc));
 404
 405                 if (!DescribePixelFormat(deviceCtx, pixelFormat, sizeof(pixelFormatDesc), &pixelFormatDesc))
 406                         throw ResourceError("DescribePixelFormat() failed");
 407
 408                 if (!SetPixelFormat(deviceCtx, pixelFormat, &pixelFormatDesc))
 409                         throw ResourceError("Failed to set pixel format");
 410         }
 411
 412         // Create context
 413         m_context = wgl.createContextAttribsARB(deviceCtx, NULL, attribList);
 414
 415         if (!m_context)
 416                 throw ResourceError("Failed to create WGL context");
 417
 418         if (!wgl.makeCurrent(deviceCtx, m_context))
 419         {
 420                 wgl.deleteContext(m_context);
 421                 throw ResourceError("wglMakeCurrent() failed");
 422         }
 423 }
 424
 425 Context::~Context (void)
 426 {
 427         const Functions& wgl = m_core->getLibrary()->getFunctions();
 428
 429         wgl.makeCurrent(m_deviceCtx, NULL);
 430         wgl.deleteContext(m_context);
 431 }
 432
 433 FunctionPtr Context::getGLFunction (const char* name) const
 434 {
 435         FunctionPtr ptr = DE_NULL;
 436
 437         // Try first with wglGeProcAddress()
 438         ptr = (FunctionPtr)m_core->getLibrary()->getFunctions().getProcAddress(name);
 439
 440         // Fall-back to dynlib
 441         if (!ptr)
 442                 ptr = (FunctionPtr)m_core->getLibrary()->getGLLibrary().getFunction(name);
 443
 444         return ptr;
 445 }
 446
 447 void Context::swapBuffers (void) const
 448 {
 449         const Functions& wgl = m_core->getLibrary()->getFunctions();
 450         if (!wgl.swapLayerBuffers(m_deviceCtx, WGL_SWAP_MAIN_PLANE))
 451                 throw ResourceError("wglSwapBuffers() failed");
 452 }
 453
 454 int choosePixelFormat (const Core& wgl, HDC deviceCtx, const glu::RenderConfig& config)
 455 {
 456         std::vector<int> pixelFormats = wgl.getPixelFormats(deviceCtx);
 457
 458         for (std::vector<int>::const_iterator fmtIter = pixelFormats.begin(); fmtIter != pixelFormats.end(); ++fmtIter)
 459         {
 460                 PixelFormatInfo info = wgl.getPixelFormatInfo(deviceCtx, *fmtIter);
 461
 462                 // Base rules: Must be OpenGL-compatible, RGBA, double-buffered, and window-renderable
 463                 if (!info.supportOpenGL                                                                                 ||
 464                         !(info.pixelType == wgl::PixelFormatInfo::PIXELTYPE_RGBA)       ||
 465                         !info.doubleBuffer                                                                                      ||
 466                         !(info.surfaceTypes & wgl::PixelFormatInfo::SURFACE_WINDOW))
 467                         continue;
 468
 469                 if (config.redBits != glu::RenderConfig::DONT_CARE &&
 470                         config.redBits != info.redBits)
 471                         continue;
 472
 473                 if (config.greenBits != glu::RenderConfig::DONT_CARE &&
 474                         config.greenBits != info.greenBits)
 475                         continue;
 476
 477                 if (config.blueBits != glu::RenderConfig::DONT_CARE &&
 478                         config.blueBits != info.blueBits)
 479                         continue;
 480
 481                 if (config.alphaBits != glu::RenderConfig::DONT_CARE &&
 482                         config.alphaBits != info.alphaBits)
 483                         continue;
 484
 485                 if (config.depthBits != glu::RenderConfig::DONT_CARE &&
 486                         config.depthBits != info.depthBits)
 487                         continue;
 488
 489                 if (config.stencilBits != glu::RenderConfig::DONT_CARE &&
 490                         config.stencilBits != info.stencilBits)
 491                         continue;
 492
 493                 if (config.numSamples != glu::RenderConfig::DONT_CARE &&
 494                         config.numSamples != info.samples)
 495                         continue;
 496
 497                 // Passed all tests - select this.
 498                 return info.pixelFormat;
 499         }
 500
 501         return -1;
 502 }
 503
 504 } // wgl
 505 } // tcu