1 // Created on: 2012-01-26
2 // Created by: Kirill GAVRILOV
3 // Copyright (c) 2012-2014 OPEN CASCADE SAS
5 // This file is part of Open CASCADE Technology software library.
7 // This library is free software; you can redistribute it and/or modify it under
8 // the terms of the GNU Lesser General Public License version 2.1 as published
9 // by the Free Software Foundation, with special exception defined in the file
10 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
11 // distribution for complete text of the license and disclaimer of any warranty.
13 // Alternatively, this file may be used under the terms of Open CASCADE
14 // commercial license or contractual agreement.
20 #include <OpenGl_Context.hxx>
22 #include <OpenGl_ArbTBO.hxx>
23 #include <OpenGl_ArbIns.hxx>
24 #include <OpenGl_ArbDbg.hxx>
25 #include <OpenGl_ArbFBO.hxx>
26 #include <OpenGl_ExtGS.hxx>
27 #include <OpenGl_GlCore20.hxx>
28 #include <OpenGl_ShaderManager.hxx>
30 #include <Message_Messenger.hxx>
32 #include <NCollection_Vector.hxx>
34 #include <Standard_ProgramError.hxx>
38 #elif defined(__APPLE__) && !defined(MACOSX_USE_GLX)
41 #include <GL/glx.h> // glXGetProcAddress()
44 // GL_NVX_gpu_memory_info
45 #ifndef GL_GPU_MEMORY_INFO_DEDICATED_VIDMEM_NVX
48 GL_GPU_MEMORY_INFO_DEDICATED_VIDMEM_NVX = 0x9047,
49 GL_GPU_MEMORY_INFO_TOTAL_AVAILABLE_MEMORY_NVX = 0x9048,
50 GL_GPU_MEMORY_INFO_CURRENT_AVAILABLE_VIDMEM_NVX = 0x9049,
51 GL_GPU_MEMORY_INFO_EVICTION_COUNT_NVX = 0x904A,
52 GL_GPU_MEMORY_INFO_EVICTED_MEMORY_NVX = 0x904B
56 IMPLEMENT_STANDARD_HANDLE (OpenGl_Context, Standard_Transient)
57 IMPLEMENT_STANDARD_RTTIEXT(OpenGl_Context, Standard_Transient)
61 static const Handle(OpenGl_Resource) NULL_GL_RESOURCE;
62 static const GLdouble OpenGl_DefaultPlaneEq[] = {0.0, 0.0, 0.0, 0.0};
65 // =======================================================================
66 // function : OpenGl_Context
68 // =======================================================================
69 OpenGl_Context::OpenGl_Context (const Handle(OpenGl_Caps)& theCaps)
86 caps (!theCaps.IsNull() ? theCaps : new OpenGl_Caps()),
87 arbNPTW(Standard_False),
93 extBgra(Standard_False),
94 extAnis(Standard_False),
95 extPDS (Standard_False),
96 atiMem (Standard_False),
97 nvxMem (Standard_False),
98 mySharedResources (new OpenGl_ResourcesMap()),
99 myDelayed (new OpenGl_DelayReleaseMap()),
100 myReleaseQueue (new OpenGl_ResourcesQueue()),
102 myGlLibHandle (NULL),
103 myFuncs (new OpenGl_GlFunctions()),
109 myRenderMode (GL_RENDER),
110 myIsInitialized (Standard_False),
111 myIsStereoBuffers (Standard_False),
114 #if defined(MAC_OS_X_VERSION_10_3) && !defined(MACOSX_USE_GLX)
115 // Vendors can not extend functionality on this system
116 // and developers are limited to OpenGL support provided by Mac OS X SDK.
117 // We retrieve function pointers from system library
118 // to generalize extensions support on all platforms.
119 // In this way we also reach binary compatibility benefit between OS releases
120 // if some newest functionality is optionally used.
121 // Notice that GL version / extension availability checks are required
122 // because function pointers may be available but not functionality itself
123 // (depends on renderer).
124 myGlLibHandle = dlopen ("/System/Library/Frameworks/OpenGL.framework/Versions/Current/OpenGL", RTLD_LAZY);
126 memset (myFuncs.operator->(), 0, sizeof(OpenGl_GlFunctions));
127 myShaderManager = new OpenGl_ShaderManager (this);
130 // =======================================================================
131 // function : ~OpenGl_Context
133 // =======================================================================
134 OpenGl_Context::~OpenGl_Context()
136 // release clean up queue
139 // release shared resources if any
140 if (((const Handle(Standard_Transient)& )mySharedResources)->GetRefCount() <= 1)
142 myShaderManager.Nullify();
143 for (NCollection_DataMap<TCollection_AsciiString, Handle(OpenGl_Resource)>::Iterator anIter (*mySharedResources);
144 anIter.More(); anIter.Next())
146 anIter.Value()->Release (this);
151 myShaderManager->SetContext (NULL);
153 mySharedResources.Nullify();
157 && caps->contextDebug
162 glGetPointerv (GL_DEBUG_CALLBACK_USER_PARAM_ARB, &aPtr);
165 arbDbg->glDebugMessageCallbackARB (NULL, NULL);
170 // =======================================================================
171 // function : MaxDegreeOfAnisotropy
173 // =======================================================================
174 Standard_Integer OpenGl_Context::MaxDegreeOfAnisotropy() const
179 // =======================================================================
180 // function : MaxTextureSize
182 // =======================================================================
183 Standard_Integer OpenGl_Context::MaxTextureSize() const
188 // =======================================================================
189 // function : MaxClipPlanes
191 // =======================================================================
192 Standard_Integer OpenGl_Context::MaxClipPlanes() const
194 return myMaxClipPlanes;
197 // =======================================================================
198 // function : SetDrawBufferLeft
200 // =======================================================================
201 void OpenGl_Context::SetDrawBufferLeft()
203 switch (myDrawBuffer)
207 glDrawBuffer (GL_BACK_LEFT);
208 myDrawBuffer = GL_BACK_LEFT;
211 case GL_FRONT_RIGHT :
213 glDrawBuffer (GL_FRONT_LEFT);
214 myDrawBuffer = GL_FRONT_LEFT;
217 case GL_FRONT_AND_BACK :
219 glDrawBuffer (GL_LEFT);
220 myDrawBuffer = GL_LEFT;
225 // =======================================================================
226 // function : SetDrawBufferRight
228 // =======================================================================
229 void OpenGl_Context::SetDrawBufferRight()
231 switch (myDrawBuffer)
235 glDrawBuffer (GL_BACK_RIGHT);
236 myDrawBuffer = GL_BACK_RIGHT;
241 glDrawBuffer (GL_FRONT_RIGHT);
242 myDrawBuffer = GL_FRONT_RIGHT;
245 case GL_FRONT_AND_BACK :
247 glDrawBuffer (GL_RIGHT);
248 myDrawBuffer = GL_RIGHT;
253 // =======================================================================
254 // function : SetDrawBufferMono
256 // =======================================================================
257 void OpenGl_Context::SetDrawBufferMono()
259 switch (myDrawBuffer)
263 glDrawBuffer (GL_BACK);
264 myDrawBuffer = GL_BACK;
268 case GL_FRONT_RIGHT :
269 glDrawBuffer (GL_FRONT);
270 myDrawBuffer = GL_FRONT;
275 glDrawBuffer (GL_FRONT_AND_BACK);
276 myDrawBuffer = GL_FRONT_AND_BACK;
281 // =======================================================================
282 // function : FetchState
284 // =======================================================================
285 void OpenGl_Context::FetchState()
287 // cache feedback mode state
288 glGetIntegerv (GL_RENDER_MODE, &myRenderMode);
290 // cache draw buffer state
291 glGetIntegerv (GL_DRAW_BUFFER, &myDrawBuffer);
294 // =======================================================================
297 // =======================================================================
298 void OpenGl_Context::Share (const Handle(OpenGl_Context)& theShareCtx)
300 if (!theShareCtx.IsNull())
302 mySharedResources = theShareCtx->mySharedResources;
303 myDelayed = theShareCtx->myDelayed;
304 myReleaseQueue = theShareCtx->myReleaseQueue;
305 myShaderManager = theShareCtx->myShaderManager;
309 #if !defined(__APPLE__) || defined(MACOSX_USE_GLX)
311 // =======================================================================
312 // function : IsCurrent
314 // =======================================================================
315 Standard_Boolean OpenGl_Context::IsCurrent() const
318 if (myWindowDC == NULL || myGContext == NULL)
320 return Standard_False;
322 return (( (HDC )myWindowDC == wglGetCurrentDC())
323 && ((HGLRC )myGContext == wglGetCurrentContext()));
325 if (myDisplay == NULL || myWindow == 0 || myGContext == 0)
327 return Standard_False;
330 return ( ((Display* )myDisplay == glXGetCurrentDisplay())
331 && ((GLXContext )myGContext == glXGetCurrentContext())
332 && ((GLXDrawable )myWindow == glXGetCurrentDrawable()));
336 // =======================================================================
337 // function : MakeCurrent
339 // =======================================================================
340 Standard_Boolean OpenGl_Context::MakeCurrent()
343 if (myWindowDC == NULL || myGContext == NULL)
345 Standard_ProgramError_Raise_if (myIsInitialized, "OpenGl_Context::Init() should be called before!");
346 return Standard_False;
349 // technically it should be safe to activate already bound GL context
350 // however some drivers (Intel etc.) may FAIL doing this for unknown reason
353 myShaderManager->SetContext (this);
354 return Standard_True;
356 else if (wglMakeCurrent ((HDC )myWindowDC, (HGLRC )myGContext) != TRUE)
358 // notice that glGetError() couldn't be used here!
359 wchar_t* aMsgBuff = NULL;
360 DWORD anErrorCode = GetLastError();
361 FormatMessageW (FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
362 NULL, anErrorCode, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (wchar_t* )&aMsgBuff, 0, NULL);
363 TCollection_ExtendedString aMsg ("wglMakeCurrent() has failed. ");
364 if (aMsgBuff != NULL)
366 aMsg += (Standard_ExtString )aMsgBuff;
367 LocalFree (aMsgBuff);
369 PushMessage (GL_DEBUG_SOURCE_WINDOW_SYSTEM_ARB, GL_DEBUG_TYPE_ERROR_ARB, (unsigned int )anErrorCode, GL_DEBUG_SEVERITY_HIGH_ARB, aMsg);
370 myIsInitialized = Standard_False;
371 return Standard_False;
374 if (myDisplay == NULL || myWindow == 0 || myGContext == 0)
376 Standard_ProgramError_Raise_if (myIsInitialized, "OpenGl_Context::Init() should be called before!");
377 return Standard_False;
380 if (!glXMakeCurrent ((Display* )myDisplay, (GLXDrawable )myWindow, (GLXContext )myGContext))
382 // if there is no current context it might be impossible to use glGetError() correctly
383 PushMessage (GL_DEBUG_SOURCE_WINDOW_SYSTEM_ARB, GL_DEBUG_TYPE_ERROR_ARB, 0, GL_DEBUG_SEVERITY_HIGH_ARB,
384 "glXMakeCurrent() has failed!");
385 myIsInitialized = Standard_False;
386 return Standard_False;
389 myShaderManager->SetContext (this);
390 return Standard_True;
393 // =======================================================================
394 // function : SwapBuffers
396 // =======================================================================
397 void OpenGl_Context::SwapBuffers()
400 if ((HDC )myWindowDC != NULL)
402 ::SwapBuffers ((HDC )myWindowDC);
406 if ((Display* )myDisplay != NULL)
408 glXSwapBuffers ((Display* )myDisplay, (GLXDrawable )myWindow);
415 // =======================================================================
416 // function : findProc
418 // =======================================================================
419 void* OpenGl_Context::findProc (const char* theFuncName)
422 return wglGetProcAddress (theFuncName);
423 #elif defined(__APPLE__) && !defined(MACOSX_USE_GLX)
424 return (myGlLibHandle != NULL) ? dlsym (myGlLibHandle, theFuncName) : NULL;
426 return (void* )glXGetProcAddress ((const GLubyte* )theFuncName);
430 // =======================================================================
431 // function : CheckExtension
433 // =======================================================================
434 Standard_Boolean OpenGl_Context::CheckExtension (const char* theExtName) const
436 if (theExtName == NULL)
438 std::cerr << "CheckExtension called with NULL string!\n";
439 return Standard_False;
442 // available since OpenGL 3.0
443 // and the ONLY way to check extensions with OpenGL 3.1+ core profile
444 /**if (IsGlGreaterEqual (3, 0))
447 glGetIntegerv (GL_NUM_EXTENSIONS, &anExtNb);
448 for (GLint anIter = 0; anIter < anExtNb; ++anIter)
450 const char* anExtension = (const char* )core30->glGetStringi (GL_EXTENSIONS, (GLuint )anIter);
451 if (anExtension[anExtNameLen] == '\0' &&
452 strncmp (anExtension, theExtName, anExtNameLen) == 0)
454 return Standard_True;
457 return Standard_False;
460 // use old way with huge string for all extensions
461 const char* anExtString = (const char* )glGetString (GL_EXTENSIONS);
462 if (anExtString == NULL)
464 Messenger()->Send ("TKOpenGL: glGetString (GL_EXTENSIONS) has returned NULL! No GL context?", Message_Warning);
465 return Standard_False;
467 return CheckExtension (anExtString, theExtName);
470 // =======================================================================
471 // function : CheckExtension
473 // =======================================================================
474 Standard_Boolean OpenGl_Context::CheckExtension (const char* theExtString,
475 const char* theExtName)
477 if (theExtString == NULL)
479 return Standard_False;
482 // Search for theExtName in the extensions string.
483 // Use of strstr() is not sufficient because extension names can be prefixes of other extension names.
484 char* aPtrIter = (char* )theExtString;
485 const char* aPtrEnd = aPtrIter + strlen (theExtString);
486 const size_t anExtNameLen = strlen (theExtName);
487 while (aPtrIter < aPtrEnd)
489 const size_t n = strcspn (aPtrIter, " ");
490 if ((n == anExtNameLen) && (strncmp (aPtrIter, theExtName, anExtNameLen) == 0))
492 return Standard_True;
496 return Standard_False;
499 #if !defined(__APPLE__) || defined(MACOSX_USE_GLX)
501 // =======================================================================
504 // =======================================================================
505 Standard_Boolean OpenGl_Context::Init()
509 return Standard_True;
513 myWindowDC = (Aspect_Handle )wglGetCurrentDC();
514 myGContext = (Aspect_RenderingContext )wglGetCurrentContext();
516 myDisplay = (Aspect_Display )glXGetCurrentDisplay();
517 myGContext = (Aspect_RenderingContext )glXGetCurrentContext();
518 myWindow = (Aspect_Drawable )glXGetCurrentDrawable();
520 if (myGContext == NULL)
522 return Standard_False;
526 myIsInitialized = Standard_True;
527 return Standard_True;
532 // =======================================================================
535 // =======================================================================
537 Standard_Boolean OpenGl_Context::Init (const Aspect_Handle theWindow,
538 const Aspect_Handle theWindowDC,
539 const Aspect_RenderingContext theGContext)
540 #elif defined(__APPLE__) && !defined(MACOSX_USE_GLX)
541 Standard_Boolean OpenGl_Context::Init (const void* theGContext)
543 Standard_Boolean OpenGl_Context::Init (const Aspect_Drawable theWindow,
544 const Aspect_Display theDisplay,
545 const Aspect_RenderingContext theGContext)
548 Standard_ProgramError_Raise_if (myIsInitialized, "OpenGl_Context::Init() should be called only once!");
550 myWindow = theWindow;
551 myGContext = theGContext;
552 myWindowDC = theWindowDC;
553 #elif defined(__APPLE__) && !defined(MACOSX_USE_GLX)
554 myGContext = (void* )theGContext;
556 myWindow = theWindow;
557 myGContext = theGContext;
558 myDisplay = theDisplay;
560 if (myGContext == NULL || !MakeCurrent())
562 return Standard_False;
566 myIsInitialized = Standard_True;
567 return Standard_True;
570 // =======================================================================
571 // function : ResetErrors
573 // =======================================================================
574 void OpenGl_Context::ResetErrors()
576 while (glGetError() != GL_NO_ERROR)
582 // =======================================================================
583 // function : readGlVersion
585 // =======================================================================
586 void OpenGl_Context::readGlVersion()
592 // available since OpenGL 3.0
593 GLint aMajor = 0, aMinor = 0;
594 glGetIntegerv (GL_MAJOR_VERSION, &aMajor);
595 glGetIntegerv (GL_MINOR_VERSION, &aMinor);
596 // glGetError() sometimes does not report an error here even if
597 // GL does not know GL_MAJOR_VERSION and GL_MINOR_VERSION constants.
598 // This happens on some rendereres like e.g. Cygwin MESA.
599 // Thus checking additionally if GL has put anything to
600 // the output variables.
601 if (glGetError() == GL_NO_ERROR && aMajor != 0 && aMinor != 0)
603 myGlVerMajor = aMajor;
604 myGlVerMinor = aMinor;
609 // Read version string.
610 // Notice that only first two numbers splitted by point '2.1 XXXXX' are significant.
611 // Following trash (after space) is vendor-specific.
612 // New drivers also returns micro version of GL like '3.3.0' which has no meaning
613 // and should be considered as vendor-specific too.
614 const char* aVerStr = (const char* )glGetString (GL_VERSION);
615 if (aVerStr == NULL || *aVerStr == '\0')
617 // invalid GL context
621 // parse string for major number
625 while (aVerStr[aMajIter] >= '0' && aVerStr[aMajIter] <= '9')
629 if (aMajIter == 0 || aMajIter >= sizeof(aMajorStr))
633 memcpy (aMajorStr, aVerStr, aMajIter);
634 aMajorStr[aMajIter] = '\0';
636 // parse string for minor number
637 aVerStr += aMajIter + 1;
639 while (aVerStr[aMinIter] >= '0' && aVerStr[aMinIter] <= '9')
643 if (aMinIter == 0 || aMinIter >= sizeof(aMinorStr))
647 memcpy (aMinorStr, aVerStr, aMinIter);
648 aMinorStr[aMinIter] = '\0';
651 myGlVerMajor = atoi (aMajorStr);
652 myGlVerMinor = atoi (aMinorStr);
654 if (myGlVerMajor <= 0)
661 static Standard_CString THE_DBGMSG_UNKNOWN = "UNKNOWN";
662 static Standard_CString THE_DBGMSG_SOURCES[] =
664 ".OpenGL", // GL_DEBUG_SOURCE_API_ARB
665 ".WinSystem", // GL_DEBUG_SOURCE_WINDOW_SYSTEM_ARB
666 ".GLSL", // GL_DEBUG_SOURCE_SHADER_COMPILER_ARB
667 ".3rdParty", // GL_DEBUG_SOURCE_THIRD_PARTY_ARB
668 "", // GL_DEBUG_SOURCE_APPLICATION_ARB
669 ".Other" // GL_DEBUG_SOURCE_OTHER_ARB
672 static Standard_CString THE_DBGMSG_TYPES[] =
674 "Error", // GL_DEBUG_TYPE_ERROR_ARB
675 "Deprecated", // GL_DEBUG_TYPE_DEPRECATED_BEHAVIOR_ARB
676 "Undef. behavior", // GL_DEBUG_TYPE_UNDEFINED_BEHAVIOR_ARB
677 "Portability", // GL_DEBUG_TYPE_PORTABILITY_ARB
678 "Performance", // GL_DEBUG_TYPE_PERFORMANCE_ARB
679 "Other" // GL_DEBUG_TYPE_OTHER_ARB
682 static Standard_CString THE_DBGMSG_SEV_HIGH = "High"; // GL_DEBUG_SEVERITY_HIGH_ARB
683 static Standard_CString THE_DBGMSG_SEV_MEDIUM = "Medium"; // GL_DEBUG_SEVERITY_MEDIUM_ARB
684 static Standard_CString THE_DBGMSG_SEV_LOW = "Low"; // GL_DEBUG_SEVERITY_LOW_ARB
686 //! Callback for GL_ARB_debug_output extension
687 static void APIENTRY debugCallbackWrap(unsigned int theSource,
688 unsigned int theType,
690 unsigned int theSeverity,
692 const char* theMessage,
693 const void* theUserParam)
695 OpenGl_Context* aCtx = (OpenGl_Context* )theUserParam;
696 aCtx->PushMessage (theSource, theType, theId, theSeverity, theMessage);
699 // =======================================================================
700 // function : PushMessage
702 // =======================================================================
703 void OpenGl_Context::PushMessage (const unsigned int theSource,
704 const unsigned int theType,
705 const unsigned int theId,
706 const unsigned int theSeverity,
707 const TCollection_ExtendedString& theMessage)
709 //OpenGl_Context* aCtx = (OpenGl_Context* )theUserParam;
710 Standard_CString& aSrc = (theSource >= GL_DEBUG_SOURCE_API_ARB
711 && theSource <= GL_DEBUG_SOURCE_OTHER_ARB)
712 ? THE_DBGMSG_SOURCES[theSource - GL_DEBUG_SOURCE_API_ARB]
713 : THE_DBGMSG_UNKNOWN;
714 Standard_CString& aType = (theType >= GL_DEBUG_TYPE_ERROR_ARB
715 && theType <= GL_DEBUG_TYPE_OTHER_ARB)
716 ? THE_DBGMSG_TYPES[theType - GL_DEBUG_TYPE_ERROR_ARB]
717 : THE_DBGMSG_UNKNOWN;
718 Standard_CString& aSev = theSeverity == GL_DEBUG_SEVERITY_HIGH_ARB
719 ? THE_DBGMSG_SEV_HIGH
720 : (theSeverity == GL_DEBUG_SEVERITY_MEDIUM_ARB
721 ? THE_DBGMSG_SEV_MEDIUM
722 : THE_DBGMSG_SEV_LOW);
723 Message_Gravity aGrav = theSeverity == GL_DEBUG_SEVERITY_HIGH_ARB
725 : (theSeverity == GL_DEBUG_SEVERITY_MEDIUM_ARB
729 TCollection_ExtendedString aMsg;
730 aMsg += "TKOpenGl"; aMsg += aSrc;
731 aMsg += " | Type: "; aMsg += aType;
732 aMsg += " | ID: "; aMsg += (Standard_Integer )theId;
733 aMsg += " | Severity: "; aMsg += aSev;
734 aMsg += " | Message:\n ";
737 Messenger()->Send (aMsg, aGrav);
740 // =======================================================================
743 // =======================================================================
744 void OpenGl_Context::init()
749 core11 = (OpenGl_GlCore11* )(&(*myFuncs));
750 core11fwd = (OpenGl_GlCore11Fwd* )(&(*myFuncs));
771 arbNPTW = CheckExtension ("GL_ARB_texture_non_power_of_two");
772 extBgra = CheckExtension ("GL_EXT_bgra");
773 extAnis = CheckExtension ("GL_EXT_texture_filter_anisotropic");
774 extPDS = CheckExtension ("GL_EXT_packed_depth_stencil");
775 atiMem = CheckExtension ("GL_ATI_meminfo");
776 nvxMem = CheckExtension ("GL_NVX_gpu_memory_info");
778 // get number of maximum clipping planes
779 glGetIntegerv (GL_MAX_CLIP_PLANES, &myMaxClipPlanes);
780 glGetIntegerv (GL_MAX_TEXTURE_SIZE, &myMaxTexDim);
783 glGetIntegerv (GL_STEREO, &aStereo);
784 myIsStereoBuffers = aStereo == 1;
788 glGetIntegerv (GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &myAnisoMax);
791 myClippingState.Init (myMaxClipPlanes);
809 //! Make record shorter to retrieve function pointer using variable with same name
810 #define FindProcShort(theFunc) FindProc(#theFunc, myFuncs->theFunc)
812 // retrieve platform-dependent extensions
814 if (FindProcShort (wglGetExtensionsStringARB))
816 const char* aWglExts = myFuncs->wglGetExtensionsStringARB (wglGetCurrentDC());
817 if (CheckExtension (aWglExts, "WGL_EXT_swap_control"))
819 FindProcShort (wglSwapIntervalEXT);
821 if (CheckExtension (aWglExts, "WGL_ARB_pixel_format"))
823 FindProcShort (wglChoosePixelFormatARB);
825 if (CheckExtension (aWglExts, "WGL_ARB_create_context_profile"))
827 FindProcShort (wglCreateContextAttribsARB);
829 if (CheckExtension (aWglExts, "WGL_NV_DX_interop"))
831 FindProcShort (wglDXSetResourceShareHandleNV);
832 FindProcShort (wglDXOpenDeviceNV);
833 FindProcShort (wglDXCloseDeviceNV);
834 FindProcShort (wglDXRegisterObjectNV);
835 FindProcShort (wglDXUnregisterObjectNV);
836 FindProcShort (wglDXObjectAccessNV);
837 FindProcShort (wglDXLockObjectsNV);
838 FindProcShort (wglDXUnlockObjectsNV);
843 // initialize debug context extension
844 if (CheckExtension ("GL_ARB_debug_output"))
847 if (FindProcShort (glDebugMessageControlARB)
848 && FindProcShort (glDebugMessageInsertARB)
849 && FindProcShort (glDebugMessageCallbackARB)
850 && FindProcShort (glGetDebugMessageLogARB))
852 arbDbg = (OpenGl_ArbDbg* )(&(*myFuncs));
855 && caps->contextDebug)
857 // setup default callback
858 arbDbg->glDebugMessageCallbackARB (debugCallbackWrap, this);
860 glEnable (GL_DEBUG_OUTPUT_SYNCHRONOUS_ARB);
865 // load OpenGL 1.2 new functions
866 has12 = IsGlGreaterEqual (1, 2)
867 && FindProcShort (glBlendColor)
868 && FindProcShort (glBlendEquation)
869 && FindProcShort (glDrawRangeElements)
870 && FindProcShort (glTexImage3D)
871 && FindProcShort (glTexSubImage3D)
872 && FindProcShort (glCopyTexSubImage3D);
874 // load OpenGL 1.3 new functions
875 has13 = IsGlGreaterEqual (1, 3)
876 && FindProcShort (glActiveTexture)
877 && FindProcShort (glSampleCoverage)
878 && FindProcShort (glCompressedTexImage3D)
879 && FindProcShort (glCompressedTexImage2D)
880 && FindProcShort (glCompressedTexImage1D)
881 && FindProcShort (glCompressedTexSubImage3D)
882 && FindProcShort (glCompressedTexSubImage2D)
883 && FindProcShort (glCompressedTexSubImage1D)
884 && FindProcShort (glGetCompressedTexImage)
885 && FindProcShort (glClientActiveTexture)
886 && FindProcShort (glMultiTexCoord1d)
887 && FindProcShort (glMultiTexCoord1dv)
888 && FindProcShort (glMultiTexCoord1f)
889 && FindProcShort (glMultiTexCoord1fv)
890 && FindProcShort (glMultiTexCoord1i)
891 && FindProcShort (glMultiTexCoord1iv)
892 && FindProcShort (glMultiTexCoord1s)
893 && FindProcShort (glMultiTexCoord1sv)
894 && FindProcShort (glMultiTexCoord2d)
895 && FindProcShort (glMultiTexCoord2dv)
896 && FindProcShort (glMultiTexCoord2f)
897 && FindProcShort (glMultiTexCoord2fv)
898 && FindProcShort (glMultiTexCoord2i)
899 && FindProcShort (glMultiTexCoord2iv)
900 && FindProcShort (glMultiTexCoord2s)
901 && FindProcShort (glMultiTexCoord2sv)
902 && FindProcShort (glMultiTexCoord3d)
903 && FindProcShort (glMultiTexCoord3dv)
904 && FindProcShort (glMultiTexCoord3f)
905 && FindProcShort (glMultiTexCoord3fv)
906 && FindProcShort (glMultiTexCoord3i)
907 && FindProcShort (glMultiTexCoord3iv)
908 && FindProcShort (glMultiTexCoord3s)
909 && FindProcShort (glMultiTexCoord3sv)
910 && FindProcShort (glMultiTexCoord4d)
911 && FindProcShort (glMultiTexCoord4dv)
912 && FindProcShort (glMultiTexCoord4f)
913 && FindProcShort (glMultiTexCoord4fv)
914 && FindProcShort (glMultiTexCoord4i)
915 && FindProcShort (glMultiTexCoord4iv)
916 && FindProcShort (glMultiTexCoord4s)
917 && FindProcShort (glMultiTexCoord4sv)
918 && FindProcShort (glLoadTransposeMatrixf)
919 && FindProcShort (glLoadTransposeMatrixd)
920 && FindProcShort (glMultTransposeMatrixf)
921 && FindProcShort (glMultTransposeMatrixd);
923 // load OpenGL 1.4 new functions
924 has14 = IsGlGreaterEqual (1, 4)
925 && FindProcShort (glBlendFuncSeparate)
926 && FindProcShort (glMultiDrawArrays)
927 && FindProcShort (glMultiDrawElements)
928 && FindProcShort (glPointParameterf)
929 && FindProcShort (glPointParameterfv)
930 && FindProcShort (glPointParameteri)
931 && FindProcShort (glPointParameteriv);
933 // load OpenGL 1.5 new functions
934 has15 = IsGlGreaterEqual (1, 5)
935 && FindProcShort (glGenQueries)
936 && FindProcShort (glDeleteQueries)
937 && FindProcShort (glIsQuery)
938 && FindProcShort (glBeginQuery)
939 && FindProcShort (glEndQuery)
940 && FindProcShort (glGetQueryiv)
941 && FindProcShort (glGetQueryObjectiv)
942 && FindProcShort (glGetQueryObjectuiv)
943 && FindProcShort (glBindBuffer)
944 && FindProcShort (glDeleteBuffers)
945 && FindProcShort (glGenBuffers)
946 && FindProcShort (glIsBuffer)
947 && FindProcShort (glBufferData)
948 && FindProcShort (glBufferSubData)
949 && FindProcShort (glGetBufferSubData)
950 && FindProcShort (glMapBuffer)
951 && FindProcShort (glUnmapBuffer)
952 && FindProcShort (glGetBufferParameteriv)
953 && FindProcShort (glGetBufferPointerv);
955 // load OpenGL 2.0 new functions
956 has20 = IsGlGreaterEqual (2, 0)
957 && FindProcShort (glBlendEquationSeparate)
958 && FindProcShort (glDrawBuffers)
959 && FindProcShort (glStencilOpSeparate)
960 && FindProcShort (glStencilFuncSeparate)
961 && FindProcShort (glStencilMaskSeparate)
962 && FindProcShort (glAttachShader)
963 && FindProcShort (glBindAttribLocation)
964 && FindProcShort (glCompileShader)
965 && FindProcShort (glCreateProgram)
966 && FindProcShort (glCreateShader)
967 && FindProcShort (glDeleteProgram)
968 && FindProcShort (glDeleteShader)
969 && FindProcShort (glDetachShader)
970 && FindProcShort (glDisableVertexAttribArray)
971 && FindProcShort (glEnableVertexAttribArray)
972 && FindProcShort (glGetActiveAttrib)
973 && FindProcShort (glGetActiveUniform)
974 && FindProcShort (glGetAttachedShaders)
975 && FindProcShort (glGetAttribLocation)
976 && FindProcShort (glGetProgramiv)
977 && FindProcShort (glGetProgramInfoLog)
978 && FindProcShort (glGetShaderiv)
979 && FindProcShort (glGetShaderInfoLog)
980 && FindProcShort (glGetShaderSource)
981 && FindProcShort (glGetUniformLocation)
982 && FindProcShort (glGetUniformfv)
983 && FindProcShort (glGetUniformiv)
984 && FindProcShort (glGetVertexAttribdv)
985 && FindProcShort (glGetVertexAttribfv)
986 && FindProcShort (glGetVertexAttribiv)
987 && FindProcShort (glGetVertexAttribPointerv)
988 && FindProcShort (glIsProgram)
989 && FindProcShort (glIsShader)
990 && FindProcShort (glLinkProgram)
991 && FindProcShort (glShaderSource)
992 && FindProcShort (glUseProgram)
993 && FindProcShort (glUniform1f)
994 && FindProcShort (glUniform2f)
995 && FindProcShort (glUniform3f)
996 && FindProcShort (glUniform4f)
997 && FindProcShort (glUniform1i)
998 && FindProcShort (glUniform2i)
999 && FindProcShort (glUniform3i)
1000 && FindProcShort (glUniform4i)
1001 && FindProcShort (glUniform1fv)
1002 && FindProcShort (glUniform2fv)
1003 && FindProcShort (glUniform3fv)
1004 && FindProcShort (glUniform4fv)
1005 && FindProcShort (glUniform1iv)
1006 && FindProcShort (glUniform2iv)
1007 && FindProcShort (glUniform3iv)
1008 && FindProcShort (glUniform4iv)
1009 && FindProcShort (glUniformMatrix2fv)
1010 && FindProcShort (glUniformMatrix3fv)
1011 && FindProcShort (glUniformMatrix4fv)
1012 && FindProcShort (glValidateProgram)
1013 && FindProcShort (glVertexAttrib1d)
1014 && FindProcShort (glVertexAttrib1dv)
1015 && FindProcShort (glVertexAttrib1f)
1016 && FindProcShort (glVertexAttrib1fv)
1017 && FindProcShort (glVertexAttrib1s)
1018 && FindProcShort (glVertexAttrib1sv)
1019 && FindProcShort (glVertexAttrib2d)
1020 && FindProcShort (glVertexAttrib2dv)
1021 && FindProcShort (glVertexAttrib2f)
1022 && FindProcShort (glVertexAttrib2fv)
1023 && FindProcShort (glVertexAttrib2s)
1024 && FindProcShort (glVertexAttrib2sv)
1025 && FindProcShort (glVertexAttrib3d)
1026 && FindProcShort (glVertexAttrib3dv)
1027 && FindProcShort (glVertexAttrib3f)
1028 && FindProcShort (glVertexAttrib3fv)
1029 && FindProcShort (glVertexAttrib3s)
1030 && FindProcShort (glVertexAttrib3sv)
1031 && FindProcShort (glVertexAttrib4Nbv)
1032 && FindProcShort (glVertexAttrib4Niv)
1033 && FindProcShort (glVertexAttrib4Nsv)
1034 && FindProcShort (glVertexAttrib4Nub)
1035 && FindProcShort (glVertexAttrib4Nubv)
1036 && FindProcShort (glVertexAttrib4Nuiv)
1037 && FindProcShort (glVertexAttrib4Nusv)
1038 && FindProcShort (glVertexAttrib4bv)
1039 && FindProcShort (glVertexAttrib4d)
1040 && FindProcShort (glVertexAttrib4dv)
1041 && FindProcShort (glVertexAttrib4f)
1042 && FindProcShort (glVertexAttrib4fv)
1043 && FindProcShort (glVertexAttrib4iv)
1044 && FindProcShort (glVertexAttrib4s)
1045 && FindProcShort (glVertexAttrib4sv)
1046 && FindProcShort (glVertexAttrib4ubv)
1047 && FindProcShort (glVertexAttrib4uiv)
1048 && FindProcShort (glVertexAttrib4usv)
1049 && FindProcShort (glVertexAttribPointer);
1051 // load OpenGL 2.1 new functions
1052 has21 = IsGlGreaterEqual (2, 1)
1053 && FindProcShort (glUniformMatrix2x3fv)
1054 && FindProcShort (glUniformMatrix3x2fv)
1055 && FindProcShort (glUniformMatrix2x4fv)
1056 && FindProcShort (glUniformMatrix4x2fv)
1057 && FindProcShort (glUniformMatrix3x4fv)
1058 && FindProcShort (glUniformMatrix4x3fv);
1060 // load GL_ARB_framebuffer_object (added to OpenGL 3.0 core)
1061 const bool hasFBO = (IsGlGreaterEqual (3, 0) || CheckExtension ("GL_ARB_framebuffer_object"))
1062 && FindProcShort (glIsRenderbuffer)
1063 && FindProcShort (glBindRenderbuffer)
1064 && FindProcShort (glDeleteRenderbuffers)
1065 && FindProcShort (glGenRenderbuffers)
1066 && FindProcShort (glRenderbufferStorage)
1067 && FindProcShort (glGetRenderbufferParameteriv)
1068 && FindProcShort (glIsFramebuffer)
1069 && FindProcShort (glBindFramebuffer)
1070 && FindProcShort (glDeleteFramebuffers)
1071 && FindProcShort (glGenFramebuffers)
1072 && FindProcShort (glCheckFramebufferStatus)
1073 && FindProcShort (glFramebufferTexture1D)
1074 && FindProcShort (glFramebufferTexture2D)
1075 && FindProcShort (glFramebufferTexture3D)
1076 && FindProcShort (glFramebufferRenderbuffer)
1077 && FindProcShort (glGetFramebufferAttachmentParameteriv)
1078 && FindProcShort (glGenerateMipmap)
1079 && FindProcShort (glBlitFramebuffer)
1080 && FindProcShort (glRenderbufferStorageMultisample)
1081 && FindProcShort (glFramebufferTextureLayer);
1083 // load GL_ARB_vertex_array_object (added to OpenGL 3.0 core)
1084 const bool hasVAO = (IsGlGreaterEqual (3, 0) || CheckExtension ("GL_ARB_vertex_array_object"))
1085 && FindProcShort (glBindVertexArray)
1086 && FindProcShort (glDeleteVertexArrays)
1087 && FindProcShort (glGenVertexArrays)
1088 && FindProcShort (glIsVertexArray);
1090 // load GL_ARB_map_buffer_range (added to OpenGL 3.0 core)
1091 const bool hasMapBufferRange = (IsGlGreaterEqual (3, 0) || CheckExtension ("GL_ARB_map_buffer_range"))
1092 && FindProcShort (glMapBufferRange)
1093 && FindProcShort (glFlushMappedBufferRange);
1095 // load OpenGL 3.0 new functions
1096 has30 = IsGlGreaterEqual (3, 0)
1099 && hasMapBufferRange
1100 && FindProcShort (glColorMaski)
1101 && FindProcShort (glGetBooleani_v)
1102 && FindProcShort (glGetIntegeri_v)
1103 && FindProcShort (glEnablei)
1104 && FindProcShort (glDisablei)
1105 && FindProcShort (glIsEnabledi)
1106 && FindProcShort (glBeginTransformFeedback)
1107 && FindProcShort (glEndTransformFeedback)
1108 && FindProcShort (glBindBufferRange)
1109 && FindProcShort (glBindBufferBase)
1110 && FindProcShort (glTransformFeedbackVaryings)
1111 && FindProcShort (glGetTransformFeedbackVarying)
1112 && FindProcShort (glClampColor)
1113 && FindProcShort (glBeginConditionalRender)
1114 && FindProcShort (glEndConditionalRender)
1115 && FindProcShort (glVertexAttribIPointer)
1116 && FindProcShort (glGetVertexAttribIiv)
1117 && FindProcShort (glGetVertexAttribIuiv)
1118 && FindProcShort (glVertexAttribI1i)
1119 && FindProcShort (glVertexAttribI2i)
1120 && FindProcShort (glVertexAttribI3i)
1121 && FindProcShort (glVertexAttribI4i)
1122 && FindProcShort (glVertexAttribI1ui)
1123 && FindProcShort (glVertexAttribI2ui)
1124 && FindProcShort (glVertexAttribI3ui)
1125 && FindProcShort (glVertexAttribI4ui)
1126 && FindProcShort (glVertexAttribI1iv)
1127 && FindProcShort (glVertexAttribI2iv)
1128 && FindProcShort (glVertexAttribI3iv)
1129 && FindProcShort (glVertexAttribI4iv)
1130 && FindProcShort (glVertexAttribI1uiv)
1131 && FindProcShort (glVertexAttribI2uiv)
1132 && FindProcShort (glVertexAttribI3uiv)
1133 && FindProcShort (glVertexAttribI4uiv)
1134 && FindProcShort (glVertexAttribI4bv)
1135 && FindProcShort (glVertexAttribI4sv)
1136 && FindProcShort (glVertexAttribI4ubv)
1137 && FindProcShort (glVertexAttribI4usv)
1138 && FindProcShort (glGetUniformuiv)
1139 && FindProcShort (glBindFragDataLocation)
1140 && FindProcShort (glGetFragDataLocation)
1141 && FindProcShort (glUniform1ui)
1142 && FindProcShort (glUniform2ui)
1143 && FindProcShort (glUniform3ui)
1144 && FindProcShort (glUniform4ui)
1145 && FindProcShort (glUniform1uiv)
1146 && FindProcShort (glUniform2uiv)
1147 && FindProcShort (glUniform3uiv)
1148 && FindProcShort (glUniform4uiv)
1149 && FindProcShort (glTexParameterIiv)
1150 && FindProcShort (glTexParameterIuiv)
1151 && FindProcShort (glGetTexParameterIiv)
1152 && FindProcShort (glGetTexParameterIuiv)
1153 && FindProcShort (glClearBufferiv)
1154 && FindProcShort (glClearBufferuiv)
1155 && FindProcShort (glClearBufferfv)
1156 && FindProcShort (glClearBufferfi)
1157 && FindProcShort (glGetStringi);
1159 // load GL_ARB_uniform_buffer_object (added to OpenGL 3.1 core)
1160 const bool hasUBO = (IsGlGreaterEqual (3, 1) || CheckExtension ("GL_ARB_uniform_buffer_object"))
1161 && FindProcShort (glGetUniformIndices)
1162 && FindProcShort (glGetActiveUniformsiv)
1163 && FindProcShort (glGetActiveUniformName)
1164 && FindProcShort (glGetUniformBlockIndex)
1165 && FindProcShort (glGetActiveUniformBlockiv)
1166 && FindProcShort (glGetActiveUniformBlockName)
1167 && FindProcShort (glUniformBlockBinding);
1169 // load GL_ARB_copy_buffer (added to OpenGL 3.1 core)
1170 const bool hasCopyBufSubData = (IsGlGreaterEqual (3, 1) || CheckExtension ("GL_ARB_copy_buffer"))
1171 && FindProcShort (glCopyBufferSubData);
1175 // NPOT textures are required by OpenGL 2.0 specifications
1176 // but doesn't hardware accelerated by some ancient OpenGL 2.1 hardware (GeForce FX, RadeOn 9700 etc.)
1177 arbNPTW = Standard_True;
1178 arbTexRG = Standard_True;
1181 // load OpenGL 3.1 new functions
1182 has31 = IsGlGreaterEqual (3, 1)
1184 && hasCopyBufSubData
1185 && FindProcShort (glDrawArraysInstanced)
1186 && FindProcShort (glDrawElementsInstanced)
1187 && FindProcShort (glTexBuffer)
1188 && FindProcShort (glPrimitiveRestartIndex);
1190 // load GL_ARB_draw_elements_base_vertex (added to OpenGL 3.2 core)
1191 const bool hasDrawElemsBaseVert = (IsGlGreaterEqual (3, 2) || CheckExtension ("GL_ARB_draw_elements_base_vertex"))
1192 && FindProcShort (glDrawElementsBaseVertex)
1193 && FindProcShort (glDrawRangeElementsBaseVertex)
1194 && FindProcShort (glDrawElementsInstancedBaseVertex)
1195 && FindProcShort (glMultiDrawElementsBaseVertex);
1197 // load GL_ARB_provoking_vertex (added to OpenGL 3.2 core)
1198 const bool hasProvokingVert = (IsGlGreaterEqual (3, 2) || CheckExtension ("GL_ARB_provoking_vertex"))
1199 && FindProcShort (glProvokingVertex);
1201 // load GL_ARB_sync (added to OpenGL 3.2 core)
1202 const bool hasSync = (IsGlGreaterEqual (3, 2) || CheckExtension ("GL_ARB_sync"))
1203 && FindProcShort (glFenceSync)
1204 && FindProcShort (glIsSync)
1205 && FindProcShort (glDeleteSync)
1206 && FindProcShort (glClientWaitSync)
1207 && FindProcShort (glWaitSync)
1208 && FindProcShort (glGetInteger64v)
1209 && FindProcShort (glGetSynciv);
1211 // load GL_ARB_texture_multisample (added to OpenGL 3.2 core)
1212 const bool hasTextureMultisample = (IsGlGreaterEqual (3, 2) || CheckExtension ("GL_ARB_texture_multisample"))
1213 && FindProcShort (glTexImage2DMultisample)
1214 && FindProcShort (glTexImage3DMultisample)
1215 && FindProcShort (glGetMultisamplefv)
1216 && FindProcShort (glSampleMaski);
1218 // load OpenGL 3.2 new functions
1219 has32 = IsGlGreaterEqual (3, 2)
1220 && hasDrawElemsBaseVert
1223 && hasTextureMultisample
1224 && FindProcShort (glGetInteger64i_v)
1225 && FindProcShort (glGetBufferParameteri64v)
1226 && FindProcShort (glFramebufferTexture);
1228 // load GL_ARB_blend_func_extended (added to OpenGL 3.3 core)
1229 const bool hasBlendFuncExtended = (IsGlGreaterEqual (3, 3) || CheckExtension ("GL_ARB_blend_func_extended"))
1230 && FindProcShort (glBindFragDataLocationIndexed)
1231 && FindProcShort (glGetFragDataIndex);
1233 // load GL_ARB_sampler_objects (added to OpenGL 3.3 core)
1234 const bool hasSamplerObjects = (IsGlGreaterEqual (3, 3) || CheckExtension ("GL_ARB_sampler_objects"))
1235 && FindProcShort (glGenSamplers)
1236 && FindProcShort (glDeleteSamplers)
1237 && FindProcShort (glIsSampler)
1238 && FindProcShort (glBindSampler)
1239 && FindProcShort (glSamplerParameteri)
1240 && FindProcShort (glSamplerParameteriv)
1241 && FindProcShort (glSamplerParameterf)
1242 && FindProcShort (glSamplerParameterfv)
1243 && FindProcShort (glSamplerParameterIiv)
1244 && FindProcShort (glSamplerParameterIuiv)
1245 && FindProcShort (glGetSamplerParameteriv)
1246 && FindProcShort (glGetSamplerParameterIiv)
1247 && FindProcShort (glGetSamplerParameterfv)
1248 && FindProcShort (glGetSamplerParameterIuiv);
1250 // load GL_ARB_timer_query (added to OpenGL 3.3 core)
1251 const bool hasTimerQuery = (IsGlGreaterEqual (3, 3) || CheckExtension ("GL_ARB_timer_query"))
1252 && FindProcShort (glQueryCounter)
1253 && FindProcShort (glGetQueryObjecti64v)
1254 && FindProcShort (glGetQueryObjectui64v);
1256 // load GL_ARB_vertex_type_2_10_10_10_rev (added to OpenGL 3.3 core)
1257 const bool hasVertType21010101rev = (IsGlGreaterEqual (3, 3) || CheckExtension ("GL_ARB_vertex_type_2_10_10_10_rev"))
1258 && FindProcShort (glVertexP2ui)
1259 && FindProcShort (glVertexP2uiv)
1260 && FindProcShort (glVertexP3ui)
1261 && FindProcShort (glVertexP3uiv)
1262 && FindProcShort (glVertexP4ui)
1263 && FindProcShort (glVertexP4uiv)
1264 && FindProcShort (glTexCoordP1ui)
1265 && FindProcShort (glTexCoordP1uiv)
1266 && FindProcShort (glTexCoordP2ui)
1267 && FindProcShort (glTexCoordP2uiv)
1268 && FindProcShort (glTexCoordP3ui)
1269 && FindProcShort (glTexCoordP3uiv)
1270 && FindProcShort (glTexCoordP4ui)
1271 && FindProcShort (glTexCoordP4uiv)
1272 && FindProcShort (glMultiTexCoordP1ui)
1273 && FindProcShort (glMultiTexCoordP1uiv)
1274 && FindProcShort (glMultiTexCoordP2ui)
1275 && FindProcShort (glMultiTexCoordP2uiv)
1276 && FindProcShort (glMultiTexCoordP3ui)
1277 && FindProcShort (glMultiTexCoordP3uiv)
1278 && FindProcShort (glMultiTexCoordP4ui)
1279 && FindProcShort (glMultiTexCoordP4uiv)
1280 && FindProcShort (glNormalP3ui)
1281 && FindProcShort (glNormalP3uiv)
1282 && FindProcShort (glColorP3ui)
1283 && FindProcShort (glColorP3uiv)
1284 && FindProcShort (glColorP4ui)
1285 && FindProcShort (glColorP4uiv)
1286 && FindProcShort (glSecondaryColorP3ui)
1287 && FindProcShort (glSecondaryColorP3uiv)
1288 && FindProcShort (glVertexAttribP1ui)
1289 && FindProcShort (glVertexAttribP1uiv)
1290 && FindProcShort (glVertexAttribP2ui)
1291 && FindProcShort (glVertexAttribP2uiv)
1292 && FindProcShort (glVertexAttribP3ui)
1293 && FindProcShort (glVertexAttribP3uiv)
1294 && FindProcShort (glVertexAttribP4ui)
1295 && FindProcShort (glVertexAttribP4uiv);
1297 // load OpenGL 3.3 extra functions
1298 has33 = IsGlGreaterEqual (3, 3)
1299 && hasBlendFuncExtended
1300 && hasSamplerObjects
1302 && hasVertType21010101rev
1303 && FindProcShort (glVertexAttribDivisor);
1305 // load GL_ARB_draw_indirect (added to OpenGL 4.0 core)
1306 const bool hasDrawIndirect = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_draw_indirect"))
1307 && FindProcShort (glDrawArraysIndirect)
1308 && FindProcShort (glDrawElementsIndirect);
1310 // load GL_ARB_gpu_shader_fp64 (added to OpenGL 4.0 core)
1311 const bool hasShaderFP64 = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_gpu_shader_fp64"))
1312 && FindProcShort (glUniform1d)
1313 && FindProcShort (glUniform2d)
1314 && FindProcShort (glUniform3d)
1315 && FindProcShort (glUniform4d)
1316 && FindProcShort (glUniform1dv)
1317 && FindProcShort (glUniform2dv)
1318 && FindProcShort (glUniform3dv)
1319 && FindProcShort (glUniform4dv)
1320 && FindProcShort (glUniformMatrix2dv)
1321 && FindProcShort (glUniformMatrix3dv)
1322 && FindProcShort (glUniformMatrix4dv)
1323 && FindProcShort (glUniformMatrix2x3dv)
1324 && FindProcShort (glUniformMatrix2x4dv)
1325 && FindProcShort (glUniformMatrix3x2dv)
1326 && FindProcShort (glUniformMatrix3x4dv)
1327 && FindProcShort (glUniformMatrix4x2dv)
1328 && FindProcShort (glUniformMatrix4x3dv)
1329 && FindProcShort (glGetUniformdv);
1331 // load GL_ARB_shader_subroutine (added to OpenGL 4.0 core)
1332 const bool hasShaderSubroutine = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_shader_subroutine"))
1333 && FindProcShort (glGetSubroutineUniformLocation)
1334 && FindProcShort (glGetSubroutineIndex)
1335 && FindProcShort (glGetActiveSubroutineUniformiv)
1336 && FindProcShort (glGetActiveSubroutineUniformName)
1337 && FindProcShort (glGetActiveSubroutineName)
1338 && FindProcShort (glUniformSubroutinesuiv)
1339 && FindProcShort (glGetUniformSubroutineuiv)
1340 && FindProcShort (glGetProgramStageiv);
1342 // load GL_ARB_tessellation_shader (added to OpenGL 4.0 core)
1343 const bool hasTessellationShader = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_tessellation_shader"))
1344 && FindProcShort (glPatchParameteri)
1345 && FindProcShort (glPatchParameterfv);
1347 // load GL_ARB_transform_feedback2 (added to OpenGL 4.0 core)
1348 const bool hasTrsfFeedback2 = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_transform_feedback2"))
1349 && FindProcShort (glBindTransformFeedback)
1350 && FindProcShort (glDeleteTransformFeedbacks)
1351 && FindProcShort (glGenTransformFeedbacks)
1352 && FindProcShort (glIsTransformFeedback)
1353 && FindProcShort (glPauseTransformFeedback)
1354 && FindProcShort (glResumeTransformFeedback)
1355 && FindProcShort (glDrawTransformFeedback);
1357 // load GL_ARB_transform_feedback3 (added to OpenGL 4.0 core)
1358 const bool hasTrsfFeedback3 = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_transform_feedback3"))
1359 && FindProcShort (glDrawTransformFeedbackStream)
1360 && FindProcShort (glBeginQueryIndexed)
1361 && FindProcShort (glEndQueryIndexed)
1362 && FindProcShort (glGetQueryIndexediv);
1364 // load OpenGL 4.0 new functions
1365 has40 = IsGlGreaterEqual (4, 0)
1368 && hasShaderSubroutine
1369 && hasTessellationShader
1372 && FindProcShort (glMinSampleShading)
1373 && FindProcShort (glBlendEquationi)
1374 && FindProcShort (glBlendEquationSeparatei)
1375 && FindProcShort (glBlendFunci)
1376 && FindProcShort (glBlendFuncSeparatei);
1378 // load GL_ARB_ES2_compatibility (added to OpenGL 4.1 core)
1379 const bool hasES2Compatibility = (IsGlGreaterEqual (4, 1) || CheckExtension ("GL_ARB_ES2_compatibility"))
1380 && FindProcShort (glReleaseShaderCompiler)
1381 && FindProcShort (glShaderBinary)
1382 && FindProcShort (glGetShaderPrecisionFormat)
1383 && FindProcShort (glDepthRangef)
1384 && FindProcShort (glClearDepthf);
1386 // load GL_ARB_get_program_binary (added to OpenGL 4.1 core)
1387 const bool hasGetProgramBinary = (IsGlGreaterEqual (4, 1) || CheckExtension ("GL_ARB_get_program_binary"))
1388 && FindProcShort (glGetProgramBinary)
1389 && FindProcShort (glProgramBinary)
1390 && FindProcShort (glProgramParameteri);
1393 // load GL_ARB_separate_shader_objects (added to OpenGL 4.1 core)
1394 const bool hasSeparateShaderObjects = (IsGlGreaterEqual (4, 1) || CheckExtension ("GL_ARB_separate_shader_objects"))
1395 && FindProcShort (glUseProgramStages)
1396 && FindProcShort (glActiveShaderProgram)
1397 && FindProcShort (glCreateShaderProgramv)
1398 && FindProcShort (glBindProgramPipeline)
1399 && FindProcShort (glDeleteProgramPipelines)
1400 && FindProcShort (glGenProgramPipelines)
1401 && FindProcShort (glIsProgramPipeline)
1402 && FindProcShort (glGetProgramPipelineiv)
1403 && FindProcShort (glProgramUniform1i)
1404 && FindProcShort (glProgramUniform1iv)
1405 && FindProcShort (glProgramUniform1f)
1406 && FindProcShort (glProgramUniform1fv)
1407 && FindProcShort (glProgramUniform1d)
1408 && FindProcShort (glProgramUniform1dv)
1409 && FindProcShort (glProgramUniform1ui)
1410 && FindProcShort (glProgramUniform1uiv)
1411 && FindProcShort (glProgramUniform2i)
1412 && FindProcShort (glProgramUniform2iv)
1413 && FindProcShort (glProgramUniform2f)
1414 && FindProcShort (glProgramUniform2fv)
1415 && FindProcShort (glProgramUniform2d)
1416 && FindProcShort (glProgramUniform2dv)
1417 && FindProcShort (glProgramUniform2ui)
1418 && FindProcShort (glProgramUniform2uiv)
1419 && FindProcShort (glProgramUniform3i)
1420 && FindProcShort (glProgramUniform3iv)
1421 && FindProcShort (glProgramUniform3f)
1422 && FindProcShort (glProgramUniform3fv)
1423 && FindProcShort (glProgramUniform3d)
1424 && FindProcShort (glProgramUniform3dv)
1425 && FindProcShort (glProgramUniform3ui)
1426 && FindProcShort (glProgramUniform3uiv)
1427 && FindProcShort (glProgramUniform4i)
1428 && FindProcShort (glProgramUniform4iv)
1429 && FindProcShort (glProgramUniform4f)
1430 && FindProcShort (glProgramUniform4fv)
1431 && FindProcShort (glProgramUniform4d)
1432 && FindProcShort (glProgramUniform4dv)
1433 && FindProcShort (glProgramUniform4ui)
1434 && FindProcShort (glProgramUniform4uiv)
1435 && FindProcShort (glProgramUniformMatrix2fv)
1436 && FindProcShort (glProgramUniformMatrix3fv)
1437 && FindProcShort (glProgramUniformMatrix4fv)
1438 && FindProcShort (glProgramUniformMatrix2dv)
1439 && FindProcShort (glProgramUniformMatrix3dv)
1440 && FindProcShort (glProgramUniformMatrix4dv)
1441 && FindProcShort (glProgramUniformMatrix2x3fv)
1442 && FindProcShort (glProgramUniformMatrix3x2fv)
1443 && FindProcShort (glProgramUniformMatrix2x4fv)
1444 && FindProcShort (glProgramUniformMatrix4x2fv)
1445 && FindProcShort (glProgramUniformMatrix3x4fv)
1446 && FindProcShort (glProgramUniformMatrix4x3fv)
1447 && FindProcShort (glProgramUniformMatrix2x3dv)
1448 && FindProcShort (glProgramUniformMatrix3x2dv)
1449 && FindProcShort (glProgramUniformMatrix2x4dv)
1450 && FindProcShort (glProgramUniformMatrix4x2dv)
1451 && FindProcShort (glProgramUniformMatrix3x4dv)
1452 && FindProcShort (glProgramUniformMatrix4x3dv)
1453 && FindProcShort (glValidateProgramPipeline)
1454 && FindProcShort (glGetProgramPipelineInfoLog);
1456 // load GL_ARB_vertex_attrib_64bit (added to OpenGL 4.1 core)
1457 const bool hasVertAttrib64bit = (IsGlGreaterEqual (4, 1) || CheckExtension ("GL_ARB_vertex_attrib_64bit"))
1458 && FindProcShort (glVertexAttribL1d)
1459 && FindProcShort (glVertexAttribL2d)
1460 && FindProcShort (glVertexAttribL3d)
1461 && FindProcShort (glVertexAttribL4d)
1462 && FindProcShort (glVertexAttribL1dv)
1463 && FindProcShort (glVertexAttribL2dv)
1464 && FindProcShort (glVertexAttribL3dv)
1465 && FindProcShort (glVertexAttribL4dv)
1466 && FindProcShort (glVertexAttribLPointer)
1467 && FindProcShort (glGetVertexAttribLdv);
1469 // load GL_ARB_viewport_array (added to OpenGL 4.1 core)
1470 const bool hasViewportArray = (IsGlGreaterEqual (4, 1) || CheckExtension ("GL_ARB_viewport_array"))
1471 && FindProcShort (glViewportArrayv)
1472 && FindProcShort (glViewportIndexedf)
1473 && FindProcShort (glViewportIndexedfv)
1474 && FindProcShort (glScissorArrayv)
1475 && FindProcShort (glScissorIndexed)
1476 && FindProcShort (glScissorIndexedv)
1477 && FindProcShort (glDepthRangeArrayv)
1478 && FindProcShort (glDepthRangeIndexed)
1479 && FindProcShort (glGetFloati_v)
1480 && FindProcShort (glGetDoublei_v);
1482 has41 = IsGlGreaterEqual (4, 1)
1483 && hasES2Compatibility
1484 && hasGetProgramBinary
1485 && hasSeparateShaderObjects
1486 && hasVertAttrib64bit
1487 && hasViewportArray;
1489 // load GL_ARB_base_instance (added to OpenGL 4.2 core)
1490 const bool hasBaseInstance = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_base_instance"))
1491 && FindProcShort (glDrawArraysInstancedBaseInstance)
1492 && FindProcShort (glDrawElementsInstancedBaseInstance)
1493 && FindProcShort (glDrawElementsInstancedBaseVertexBaseInstance);
1495 // load GL_ARB_transform_feedback_instanced (added to OpenGL 4.2 core)
1496 const bool hasTrsfFeedbackInstanced = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_transform_feedback_instanced"))
1497 && FindProcShort (glDrawTransformFeedbackInstanced)
1498 && FindProcShort (glDrawTransformFeedbackStreamInstanced);
1500 // load GL_ARB_internalformat_query (added to OpenGL 4.2 core)
1501 const bool hasInternalFormatQuery = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_internalformat_query"))
1502 && FindProcShort (glGetInternalformativ);
1504 // load GL_ARB_shader_atomic_counters (added to OpenGL 4.2 core)
1505 const bool hasShaderAtomicCounters = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_shader_atomic_counters"))
1506 && FindProcShort (glGetActiveAtomicCounterBufferiv);
1508 // load GL_ARB_shader_image_load_store (added to OpenGL 4.2 core)
1509 const bool hasShaderImgLoadStore = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_shader_image_load_store"))
1510 && FindProcShort (glBindImageTexture)
1511 && FindProcShort (glMemoryBarrier);
1513 // load GL_ARB_texture_storage (added to OpenGL 4.2 core)
1514 const bool hasTextureStorage = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_texture_storage"))
1515 && FindProcShort (glTexStorage1D)
1516 && FindProcShort (glTexStorage2D)
1517 && FindProcShort (glTexStorage3D)
1518 && FindProcShort (glTextureStorage1DEXT)
1519 && FindProcShort (glTextureStorage2DEXT)
1520 && FindProcShort (glTextureStorage3DEXT);
1522 has42 = IsGlGreaterEqual (4, 2)
1524 && hasTrsfFeedbackInstanced
1525 && hasInternalFormatQuery
1526 && hasShaderAtomicCounters
1527 && hasShaderImgLoadStore
1528 && hasTextureStorage;
1530 has43 = IsGlGreaterEqual (4, 3)
1531 && FindProcShort (glClearBufferData)
1532 && FindProcShort (glClearBufferSubData)
1533 && FindProcShort (glDispatchCompute)
1534 && FindProcShort (glDispatchComputeIndirect)
1535 && FindProcShort (glCopyImageSubData)
1536 && FindProcShort (glFramebufferParameteri)
1537 && FindProcShort (glGetFramebufferParameteriv)
1538 && FindProcShort (glGetInternalformati64v)
1539 && FindProcShort (glInvalidateTexSubImage)
1540 && FindProcShort (glInvalidateTexImage)
1541 && FindProcShort (glInvalidateBufferSubData)
1542 && FindProcShort (glInvalidateBufferData)
1543 && FindProcShort (glInvalidateFramebuffer)
1544 && FindProcShort (glInvalidateSubFramebuffer)
1545 && FindProcShort (glMultiDrawArraysIndirect)
1546 && FindProcShort (glMultiDrawElementsIndirect)
1547 && FindProcShort (glGetProgramInterfaceiv)
1548 && FindProcShort (glGetProgramResourceIndex)
1549 && FindProcShort (glGetProgramResourceName)
1550 && FindProcShort (glGetProgramResourceiv)
1551 && FindProcShort (glGetProgramResourceLocation)
1552 && FindProcShort (glGetProgramResourceLocationIndex)
1553 && FindProcShort (glShaderStorageBlockBinding)
1554 && FindProcShort (glTexBufferRange)
1555 && FindProcShort (glTexStorage2DMultisample)
1556 && FindProcShort (glTexStorage3DMultisample)
1557 && FindProcShort (glTextureView)
1558 && FindProcShort (glBindVertexBuffer)
1559 && FindProcShort (glVertexAttribFormat)
1560 && FindProcShort (glVertexAttribIFormat)
1561 && FindProcShort (glVertexAttribLFormat)
1562 && FindProcShort (glVertexAttribBinding)
1563 && FindProcShort (glVertexBindingDivisor)
1564 && FindProcShort (glDebugMessageControl)
1565 && FindProcShort (glDebugMessageInsert)
1566 && FindProcShort (glDebugMessageCallback)
1567 && FindProcShort (glGetDebugMessageLog)
1568 && FindProcShort (glPushDebugGroup)
1569 && FindProcShort (glPopDebugGroup)
1570 && FindProcShort (glObjectLabel)
1571 && FindProcShort (glGetObjectLabel)
1572 && FindProcShort (glObjectPtrLabel)
1573 && FindProcShort (glGetObjectPtrLabel);
1575 // load GL_ARB_clear_texture (added to OpenGL 4.4 core)
1576 bool arbTexClear = (IsGlGreaterEqual (4, 4) || CheckExtension ("GL_ARB_clear_texture"))
1577 && FindProcShort (glClearTexImage)
1578 && FindProcShort (glClearTexSubImage);
1580 has44 = IsGlGreaterEqual (4, 4)
1582 && FindProcShort (glBufferStorage)
1583 && FindProcShort (glBindBuffersBase)
1584 && FindProcShort (glBindBuffersRange)
1585 && FindProcShort (glBindTextures)
1586 && FindProcShort (glBindSamplers)
1587 && FindProcShort (glBindImageTextures)
1588 && FindProcShort (glBindVertexBuffers);
1590 // initialize TBO extension (ARB)
1592 && CheckExtension ("GL_ARB_texture_buffer_object")
1593 && FindProc ("glTexBufferARB", myFuncs->glTexBuffer))
1595 arbTBO = (OpenGl_ArbTBO* )(&(*myFuncs));
1598 // initialize hardware instancing extension (ARB)
1600 && CheckExtension ("GL_ARB_draw_instanced")
1601 && FindProc ("glDrawArraysInstancedARB", myFuncs->glDrawArraysInstanced)
1602 && FindProc ("glDrawElementsInstancedARB", myFuncs->glDrawElementsInstanced))
1604 arbIns = (OpenGl_ArbIns* )(&(*myFuncs));
1607 // initialize FBO extension (ARB)
1610 arbFBO = (OpenGl_ArbFBO* )(&(*myFuncs));
1611 extPDS = Standard_True; // extension for EXT, but part of ARB
1614 // initialize GS extension (EXT)
1615 if (CheckExtension ("GL_EXT_geometry_shader4")
1616 && FindProcShort (glProgramParameteriEXT))
1618 extGS = (OpenGl_ExtGS* )(&(*myFuncs));
1645 core15 = (OpenGl_GlCore15* )(&(*myFuncs));
1646 core15fwd = (OpenGl_GlCore15Fwd* )(&(*myFuncs));
1655 core20 = (OpenGl_GlCore20* )(&(*myFuncs));
1656 core20fwd = (OpenGl_GlCore20Fwd* )(&(*myFuncs));
1678 arbTBO = (OpenGl_ArbTBO* )(&(*myFuncs));
1679 arbIns = (OpenGl_ArbIns* )(&(*myFuncs));
1687 core32 = (OpenGl_GlCore32* )(&(*myFuncs));
1688 core32back = (OpenGl_GlCore32Back* )(&(*myFuncs));
1710 core41 = (OpenGl_GlCore41* )(&(*myFuncs));
1711 core41back = (OpenGl_GlCore41Back* )(&(*myFuncs));
1719 core42 = (OpenGl_GlCore42* )(&(*myFuncs));
1720 core42back = (OpenGl_GlCore42Back* )(&(*myFuncs));
1728 core43 = (OpenGl_GlCore43* )(&(*myFuncs));
1729 core43back = (OpenGl_GlCore43Back* )(&(*myFuncs));
1737 core44 = (OpenGl_GlCore44* )(&(*myFuncs));
1738 core44back = (OpenGl_GlCore44Back* )(&(*myFuncs));
1741 // =======================================================================
1742 // function : MemoryInfo
1744 // =======================================================================
1745 Standard_Size OpenGl_Context::AvailableMemory() const
1749 // this is actually information for VBO pool
1750 // however because pools are mostly shared
1751 // it can be used for total GPU memory estimations
1754 glGetIntegerv (GL_VBO_FREE_MEMORY_ATI, aMemInfo);
1755 // returned value is in KiB, however this maybe changed in future
1756 return Standard_Size(aMemInfo[0]) * 1024;
1760 // current available dedicated video memory (in KiB), currently unused GPU memory
1762 glGetIntegerv (GL_GPU_MEMORY_INFO_CURRENT_AVAILABLE_VIDMEM_NVX, &aMemInfo);
1763 return Standard_Size(aMemInfo) * 1024;
1768 // =======================================================================
1769 // function : MemoryInfo
1771 // =======================================================================
1772 TCollection_AsciiString OpenGl_Context::MemoryInfo() const
1774 TCollection_AsciiString anInfo;
1778 memset (aValues, 0, sizeof(aValues));
1779 glGetIntegerv (GL_VBO_FREE_MEMORY_ATI, aValues);
1781 // total memory free in the pool
1782 anInfo += TCollection_AsciiString (" GPU free memory: ") + (aValues[0] / 1024) + " MiB\n";
1784 // largest available free block in the pool
1785 anInfo += TCollection_AsciiString (" Largest free block: ") + (aValues[1] / 1024) + " MiB\n";
1786 if (aValues[2] != aValues[0])
1788 // total auxiliary memory free
1789 anInfo += TCollection_AsciiString (" Free memory: ") + (aValues[2] / 1024) + " MiB\n";
1794 //current available dedicated video memory (in KiB), currently unused GPU memory
1796 glGetIntegerv (GL_GPU_MEMORY_INFO_CURRENT_AVAILABLE_VIDMEM_NVX, &aValue);
1797 anInfo += TCollection_AsciiString (" GPU free memory: ") + (aValue / 1024) + " MiB\n";
1799 // dedicated video memory, total size (in KiB) of the GPU memory
1800 GLint aDedicated = 0;
1801 glGetIntegerv (GL_GPU_MEMORY_INFO_DEDICATED_VIDMEM_NVX, &aDedicated);
1802 anInfo += TCollection_AsciiString (" GPU memory: ") + (aDedicated / 1024) + " MiB\n";
1804 // total available memory, total size (in KiB) of the memory available for allocations
1805 glGetIntegerv (GL_GPU_MEMORY_INFO_TOTAL_AVAILABLE_MEMORY_NVX, &aValue);
1806 if (aValue != aDedicated)
1808 // different only for special configurations
1809 anInfo += TCollection_AsciiString (" Total memory: ") + (aValue / 1024) + " MiB\n";
1816 // =======================================================================
1817 // function : GetResource
1819 // =======================================================================
1820 const Handle(OpenGl_Resource)& OpenGl_Context::GetResource (const TCollection_AsciiString& theKey) const
1822 return mySharedResources->IsBound (theKey) ? mySharedResources->Find (theKey) : NULL_GL_RESOURCE;
1825 // =======================================================================
1826 // function : ShareResource
1828 // =======================================================================
1829 Standard_Boolean OpenGl_Context::ShareResource (const TCollection_AsciiString& theKey,
1830 const Handle(OpenGl_Resource)& theResource)
1832 if (theKey.IsEmpty() || theResource.IsNull())
1834 return Standard_False;
1836 return mySharedResources->Bind (theKey, theResource);
1839 // =======================================================================
1840 // function : ReleaseResource
1842 // =======================================================================
1843 void OpenGl_Context::ReleaseResource (const TCollection_AsciiString& theKey,
1844 const Standard_Boolean theToDelay)
1846 if (!mySharedResources->IsBound (theKey))
1850 const Handle(OpenGl_Resource)& aRes = mySharedResources->Find (theKey);
1851 if (aRes->GetRefCount() > 1)
1858 myDelayed->Bind (theKey, 1);
1862 aRes->Release (this);
1863 mySharedResources->UnBind (theKey);
1867 // =======================================================================
1868 // function : DelayedRelease
1870 // =======================================================================
1871 void OpenGl_Context::DelayedRelease (Handle(OpenGl_Resource)& theResource)
1873 myReleaseQueue->Push (theResource);
1874 theResource.Nullify();
1877 // =======================================================================
1878 // function : ReleaseDelayed
1880 // =======================================================================
1881 void OpenGl_Context::ReleaseDelayed()
1883 // release queued elements
1884 while (!myReleaseQueue->IsEmpty())
1886 myReleaseQueue->Front()->Release (this);
1887 myReleaseQueue->Pop();
1890 // release delayed shared resources
1891 NCollection_Vector<TCollection_AsciiString> aDeadList;
1892 for (NCollection_DataMap<TCollection_AsciiString, Standard_Integer>::Iterator anIter (*myDelayed);
1893 anIter.More(); anIter.Next())
1895 if (++anIter.ChangeValue() <= 2)
1897 continue; // postpone release one more frame to ensure noone use it periodically
1900 const TCollection_AsciiString& aKey = anIter.Key();
1901 if (!mySharedResources->IsBound (aKey))
1903 // mixed unshared strategy delayed/undelayed was used!
1904 aDeadList.Append (aKey);
1908 Handle(OpenGl_Resource)& aRes = mySharedResources->ChangeFind (aKey);
1909 if (aRes->GetRefCount() > 1)
1911 // should be only 1 instance in mySharedResources
1912 // if not - resource was reused again
1913 aDeadList.Append (aKey);
1917 // release resource if no one requiested it more than 2 redraw calls
1918 aRes->Release (this);
1919 mySharedResources->UnBind (aKey);
1920 aDeadList.Append (aKey);
1923 for (Standard_Integer anIter = 0; anIter < aDeadList.Length(); ++anIter)
1925 myDelayed->UnBind (aDeadList.Value (anIter));