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_ArbTexBindless.hxx>
28 #include <OpenGl_GlCore20.hxx>
29 #include <OpenGl_Sampler.hxx>
30 #include <OpenGl_ShaderManager.hxx>
32 #include <Message_Messenger.hxx>
34 #include <NCollection_Vector.hxx>
36 #include <Standard_ProgramError.hxx>
41 #pragma comment(lib, "libEGL.lib")
45 #elif defined(__APPLE__) && !defined(MACOSX_USE_GLX)
48 #include <GL/glx.h> // glXGetProcAddress()
51 // GL_NVX_gpu_memory_info
52 #ifndef GL_GPU_MEMORY_INFO_DEDICATED_VIDMEM_NVX
55 GL_GPU_MEMORY_INFO_DEDICATED_VIDMEM_NVX = 0x9047,
56 GL_GPU_MEMORY_INFO_TOTAL_AVAILABLE_MEMORY_NVX = 0x9048,
57 GL_GPU_MEMORY_INFO_CURRENT_AVAILABLE_VIDMEM_NVX = 0x9049,
58 GL_GPU_MEMORY_INFO_EVICTION_COUNT_NVX = 0x904A,
59 GL_GPU_MEMORY_INFO_EVICTED_MEMORY_NVX = 0x904B
63 IMPLEMENT_STANDARD_HANDLE (OpenGl_Context, Standard_Transient)
64 IMPLEMENT_STANDARD_RTTIEXT(OpenGl_Context, Standard_Transient)
68 static const Handle(OpenGl_Resource) NULL_GL_RESOURCE;
71 // =======================================================================
72 // function : OpenGl_Context
74 // =======================================================================
75 OpenGl_Context::OpenGl_Context (const Handle(OpenGl_Caps)& theCaps)
94 caps (!theCaps.IsNull() ? theCaps : new OpenGl_Caps()),
95 #if defined(GL_ES_VERSION_2_0)
96 hasHighp (Standard_False),
97 hasTexRGBA8(Standard_False),
99 hasHighp (Standard_True),
100 hasTexRGBA8(Standard_True),
102 arbNPTW (Standard_False),
103 arbTexRG (Standard_False),
104 arbTexBindless (NULL),
106 arbTboRGB32 (Standard_False),
111 extBgra(Standard_False),
112 extAnis(Standard_False),
113 extPDS (Standard_False),
114 atiMem (Standard_False),
115 nvxMem (Standard_False),
116 mySharedResources (new OpenGl_ResourcesMap()),
117 myDelayed (new OpenGl_DelayReleaseMap()),
118 myUnusedResources (new OpenGl_ResourcesStack()),
120 myGlLibHandle (NULL),
121 myFuncs (new OpenGl_GlFunctions()),
123 myTexClamp (GL_CLAMP_TO_EDGE),
128 myIsInitialized (Standard_False),
129 myIsStereoBuffers (Standard_False),
130 myIsGlNormalizeEnabled (Standard_False),
131 #if !defined(GL_ES_VERSION_2_0)
132 myRenderMode (GL_RENDER),
138 #if defined(__APPLE__) && !defined(MACOSX_USE_GLX)
139 // Vendors can not extend functionality on this system
140 // and developers are limited to OpenGL support provided by Mac OS X SDK.
141 // We retrieve function pointers from system library
142 // to generalize extensions support on all platforms.
143 // In this way we also reach binary compatibility benefit between OS releases
144 // if some newest functionality is optionally used.
145 // Notice that GL version / extension availability checks are required
146 // because function pointers may be available but not functionality itself
147 // (depends on renderer).
148 myGlLibHandle = dlopen ("/System/Library/Frameworks/OpenGL.framework/Versions/Current/OpenGL", RTLD_LAZY);
150 memset (myFuncs.operator->(), 0, sizeof(OpenGl_GlFunctions));
151 myShaderManager = new OpenGl_ShaderManager (this);
154 // =======================================================================
155 // function : ~OpenGl_Context
157 // =======================================================================
158 OpenGl_Context::~OpenGl_Context()
160 // release clean up queue
163 // release shared resources if any
164 if (((const Handle(Standard_Transient)& )mySharedResources)->GetRefCount() <= 1)
166 myShaderManager.Nullify();
167 for (NCollection_DataMap<TCollection_AsciiString, Handle(OpenGl_Resource)>::Iterator anIter (*mySharedResources);
168 anIter.More(); anIter.Next())
170 anIter.Value()->Release (this);
175 myShaderManager->SetContext (NULL);
177 mySharedResources.Nullify();
180 // release sampler object
181 if (!myTexSampler.IsNull())
183 myTexSampler->Release (this);
186 #if !defined(GL_ES_VERSION_2_0)
188 && caps->contextDebug
193 glGetPointerv (GL_DEBUG_CALLBACK_USER_PARAM_ARB, &aPtr);
196 arbDbg->glDebugMessageCallbackARB (NULL, NULL);
202 // =======================================================================
203 // function : forcedRelease
205 // =======================================================================
206 void OpenGl_Context::forcedRelease()
209 for (NCollection_DataMap<TCollection_AsciiString, Handle(OpenGl_Resource)>::Iterator anIter (*mySharedResources);
210 anIter.More(); anIter.Next())
212 anIter.Value()->Release (this);
214 mySharedResources->Clear();
215 myShaderManager->clear();
216 myShaderManager->SetContext (NULL);
219 // =======================================================================
220 // function : MaxDegreeOfAnisotropy
222 // =======================================================================
223 Standard_Integer OpenGl_Context::MaxDegreeOfAnisotropy() const
228 // =======================================================================
229 // function : MaxTextureSize
231 // =======================================================================
232 Standard_Integer OpenGl_Context::MaxTextureSize() const
237 // =======================================================================
238 // function : MaxClipPlanes
240 // =======================================================================
241 Standard_Integer OpenGl_Context::MaxClipPlanes() const
243 return myMaxClipPlanes;
246 // =======================================================================
247 // function : SetDrawBufferLeft
249 // =======================================================================
250 void OpenGl_Context::SetDrawBufferLeft()
252 #if !defined(GL_ES_VERSION_2_0)
253 switch (myDrawBuffer)
257 glDrawBuffer (GL_BACK_LEFT);
258 myDrawBuffer = GL_BACK_LEFT;
261 case GL_FRONT_RIGHT :
263 glDrawBuffer (GL_FRONT_LEFT);
264 myDrawBuffer = GL_FRONT_LEFT;
267 case GL_FRONT_AND_BACK :
269 glDrawBuffer (GL_LEFT);
270 myDrawBuffer = GL_LEFT;
276 // =======================================================================
277 // function : SetDrawBufferRight
279 // =======================================================================
280 void OpenGl_Context::SetDrawBufferRight()
282 #if !defined(GL_ES_VERSION_2_0)
283 switch (myDrawBuffer)
287 glDrawBuffer (GL_BACK_RIGHT);
288 myDrawBuffer = GL_BACK_RIGHT;
293 glDrawBuffer (GL_FRONT_RIGHT);
294 myDrawBuffer = GL_FRONT_RIGHT;
297 case GL_FRONT_AND_BACK :
299 glDrawBuffer (GL_RIGHT);
300 myDrawBuffer = GL_RIGHT;
306 // =======================================================================
307 // function : SetDrawBufferMono
309 // =======================================================================
310 void OpenGl_Context::SetDrawBufferMono()
312 #if !defined(GL_ES_VERSION_2_0)
313 switch (myDrawBuffer)
317 glDrawBuffer (GL_BACK);
318 myDrawBuffer = GL_BACK;
322 case GL_FRONT_RIGHT :
323 glDrawBuffer (GL_FRONT);
324 myDrawBuffer = GL_FRONT;
329 glDrawBuffer (GL_FRONT_AND_BACK);
330 myDrawBuffer = GL_FRONT_AND_BACK;
336 // =======================================================================
337 // function : FetchState
339 // =======================================================================
340 void OpenGl_Context::FetchState()
342 #if !defined(GL_ES_VERSION_2_0)
343 // cache feedback mode state
344 glGetIntegerv (GL_RENDER_MODE, &myRenderMode);
346 // cache draw buffer state
347 glGetIntegerv (GL_DRAW_BUFFER, &myDrawBuffer);
351 // =======================================================================
354 // =======================================================================
355 void OpenGl_Context::Share (const Handle(OpenGl_Context)& theShareCtx)
357 if (!theShareCtx.IsNull())
359 mySharedResources = theShareCtx->mySharedResources;
360 myDelayed = theShareCtx->myDelayed;
361 myUnusedResources = theShareCtx->myUnusedResources;
362 myShaderManager = theShareCtx->myShaderManager;
366 #if !defined(__APPLE__) || defined(MACOSX_USE_GLX)
368 // =======================================================================
369 // function : IsCurrent
371 // =======================================================================
372 Standard_Boolean OpenGl_Context::IsCurrent() const
374 #if defined(HAVE_EGL)
375 if ((EGLDisplay )myDisplay == EGL_NO_DISPLAY
376 || (EGLSurface )myWindow == EGL_NO_SURFACE
377 || (EGLContext )myGContext == EGL_NO_CONTEXT)
379 return Standard_False;
382 return (((EGLDisplay )myDisplay == eglGetCurrentDisplay())
383 && ((EGLContext )myGContext == eglGetCurrentContext())
384 && ((EGLSurface )myWindow == eglGetCurrentSurface (EGL_DRAW)));
385 #elif defined(_WIN32)
386 if (myWindowDC == NULL || myGContext == NULL)
388 return Standard_False;
390 return (( (HDC )myWindowDC == wglGetCurrentDC())
391 && ((HGLRC )myGContext == wglGetCurrentContext()));
393 if (myDisplay == NULL || myWindow == 0 || myGContext == 0)
395 return Standard_False;
398 return ( ((Display* )myDisplay == glXGetCurrentDisplay())
399 && ((GLXContext )myGContext == glXGetCurrentContext())
400 && ((GLXDrawable )myWindow == glXGetCurrentDrawable()));
404 // =======================================================================
405 // function : MakeCurrent
407 // =======================================================================
408 Standard_Boolean OpenGl_Context::MakeCurrent()
410 #if defined(HAVE_EGL)
411 if ((EGLDisplay )myDisplay == EGL_NO_DISPLAY
412 || (EGLSurface )myWindow == EGL_NO_SURFACE
413 || (EGLContext )myGContext == EGL_NO_CONTEXT)
415 Standard_ProgramError_Raise_if (myIsInitialized, "OpenGl_Context::Init() should be called before!");
416 return Standard_False;
419 if (eglMakeCurrent ((EGLDisplay )myDisplay, (EGLSurface )myWindow, (EGLSurface )myWindow, (EGLContext )myGContext) != EGL_TRUE)
421 // if there is no current context it might be impossible to use glGetError() correctly
422 PushMessage (GL_DEBUG_SOURCE_WINDOW_SYSTEM_ARB, GL_DEBUG_TYPE_ERROR_ARB, 0, GL_DEBUG_SEVERITY_HIGH_ARB,
423 "eglMakeCurrent() has failed!");
424 myIsInitialized = Standard_False;
425 return Standard_False;
427 #elif defined(_WIN32)
428 if (myWindowDC == NULL || myGContext == NULL)
430 Standard_ProgramError_Raise_if (myIsInitialized, "OpenGl_Context::Init() should be called before!");
431 return Standard_False;
434 // technically it should be safe to activate already bound GL context
435 // however some drivers (Intel etc.) may FAIL doing this for unknown reason
438 myShaderManager->SetContext (this);
439 return Standard_True;
441 else if (wglMakeCurrent ((HDC )myWindowDC, (HGLRC )myGContext) != TRUE)
443 // notice that glGetError() couldn't be used here!
444 wchar_t* aMsgBuff = NULL;
445 DWORD anErrorCode = GetLastError();
446 FormatMessageW (FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
447 NULL, anErrorCode, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (wchar_t* )&aMsgBuff, 0, NULL);
448 TCollection_ExtendedString aMsg ("wglMakeCurrent() has failed. ");
449 if (aMsgBuff != NULL)
451 aMsg += (Standard_ExtString )aMsgBuff;
452 LocalFree (aMsgBuff);
454 PushMessage (GL_DEBUG_SOURCE_WINDOW_SYSTEM_ARB, GL_DEBUG_TYPE_ERROR_ARB, (unsigned int )anErrorCode, GL_DEBUG_SEVERITY_HIGH_ARB, aMsg);
455 myIsInitialized = Standard_False;
456 return Standard_False;
459 if (myDisplay == NULL || myWindow == 0 || myGContext == 0)
461 Standard_ProgramError_Raise_if (myIsInitialized, "OpenGl_Context::Init() should be called before!");
462 return Standard_False;
465 if (!glXMakeCurrent ((Display* )myDisplay, (GLXDrawable )myWindow, (GLXContext )myGContext))
467 // if there is no current context it might be impossible to use glGetError() correctly
468 PushMessage (GL_DEBUG_SOURCE_WINDOW_SYSTEM_ARB, GL_DEBUG_TYPE_ERROR_ARB, 0, GL_DEBUG_SEVERITY_HIGH_ARB,
469 "glXMakeCurrent() has failed!");
470 myIsInitialized = Standard_False;
471 return Standard_False;
474 myShaderManager->SetContext (this);
475 return Standard_True;
478 // =======================================================================
479 // function : SwapBuffers
481 // =======================================================================
482 void OpenGl_Context::SwapBuffers()
484 #if defined(HAVE_EGL)
485 if ((EGLSurface )myWindow != EGL_NO_SURFACE)
487 eglSwapBuffers ((EGLDisplay )myDisplay, (EGLSurface )myWindow);
489 #elif defined(_WIN32)
490 if ((HDC )myWindowDC != NULL)
492 ::SwapBuffers ((HDC )myWindowDC);
496 if ((Display* )myDisplay != NULL)
498 glXSwapBuffers ((Display* )myDisplay, (GLXDrawable )myWindow);
505 // =======================================================================
506 // function : findProc
508 // =======================================================================
509 void* OpenGl_Context::findProc (const char* theFuncName)
511 #if defined(HAVE_EGL)
512 return (void* )eglGetProcAddress (theFuncName);
513 #elif defined(_WIN32)
514 return wglGetProcAddress (theFuncName);
515 #elif defined(__APPLE__) && !defined(MACOSX_USE_GLX)
516 return (myGlLibHandle != NULL) ? dlsym (myGlLibHandle, theFuncName) : NULL;
518 return (void* )glXGetProcAddress ((const GLubyte* )theFuncName);
522 // =======================================================================
523 // function : CheckExtension
525 // =======================================================================
526 Standard_Boolean OpenGl_Context::CheckExtension (const char* theExtName) const
528 if (theExtName == NULL)
531 std::cerr << "CheckExtension called with NULL string!\n";
533 return Standard_False;
536 // available since OpenGL 3.0
537 // and the ONLY way to check extensions with OpenGL 3.1+ core profile
538 /**if (IsGlGreaterEqual (3, 0))
541 glGetIntegerv (GL_NUM_EXTENSIONS, &anExtNb);
542 for (GLint anIter = 0; anIter < anExtNb; ++anIter)
544 const char* anExtension = (const char* )core30->glGetStringi (GL_EXTENSIONS, (GLuint )anIter);
545 if (anExtension[anExtNameLen] == '\0' &&
546 strncmp (anExtension, theExtName, anExtNameLen) == 0)
548 return Standard_True;
551 return Standard_False;
554 // use old way with huge string for all extensions
555 const char* anExtString = (const char* )glGetString (GL_EXTENSIONS);
556 if (anExtString == NULL)
558 Messenger()->Send ("TKOpenGL: glGetString (GL_EXTENSIONS) has returned NULL! No GL context?", Message_Warning);
559 return Standard_False;
561 return CheckExtension (anExtString, theExtName);
564 // =======================================================================
565 // function : CheckExtension
567 // =======================================================================
568 Standard_Boolean OpenGl_Context::CheckExtension (const char* theExtString,
569 const char* theExtName)
571 if (theExtString == NULL)
573 return Standard_False;
576 // Search for theExtName in the extensions string.
577 // Use of strstr() is not sufficient because extension names can be prefixes of other extension names.
578 char* aPtrIter = (char* )theExtString;
579 const char* aPtrEnd = aPtrIter + strlen (theExtString);
580 const size_t anExtNameLen = strlen (theExtName);
581 while (aPtrIter < aPtrEnd)
583 const size_t n = strcspn (aPtrIter, " ");
584 if ((n == anExtNameLen) && (strncmp (aPtrIter, theExtName, anExtNameLen) == 0))
586 return Standard_True;
590 return Standard_False;
593 #if !defined(__APPLE__) || defined(MACOSX_USE_GLX)
595 // =======================================================================
598 // =======================================================================
599 Standard_Boolean OpenGl_Context::Init()
603 return Standard_True;
606 #if defined(HAVE_EGL)
607 myDisplay = (Aspect_Display )eglGetCurrentDisplay();
608 myGContext = (Aspect_RenderingContext )eglGetCurrentContext();
609 myWindow = (Aspect_Drawable )eglGetCurrentSurface(EGL_DRAW);
610 #elif defined(_WIN32)
611 myWindowDC = (Aspect_Handle )wglGetCurrentDC();
612 myGContext = (Aspect_RenderingContext )wglGetCurrentContext();
614 myDisplay = (Aspect_Display )glXGetCurrentDisplay();
615 myGContext = (Aspect_RenderingContext )glXGetCurrentContext();
616 myWindow = (Aspect_Drawable )glXGetCurrentDrawable();
618 if (myGContext == NULL)
620 return Standard_False;
624 myIsInitialized = Standard_True;
625 return Standard_True;
630 // =======================================================================
633 // =======================================================================
634 #if defined(HAVE_EGL)
635 Standard_Boolean OpenGl_Context::Init (const Aspect_Drawable theEglSurface,
636 const Aspect_Display theEglDisplay,
637 const Aspect_RenderingContext theEglContext)
638 #elif defined(_WIN32)
639 Standard_Boolean OpenGl_Context::Init (const Aspect_Handle theWindow,
640 const Aspect_Handle theWindowDC,
641 const Aspect_RenderingContext theGContext)
642 #elif defined(__APPLE__) && !defined(MACOSX_USE_GLX)
643 Standard_Boolean OpenGl_Context::Init (const void* theGContext)
645 Standard_Boolean OpenGl_Context::Init (const Aspect_Drawable theWindow,
646 const Aspect_Display theDisplay,
647 const Aspect_RenderingContext theGContext)
650 Standard_ProgramError_Raise_if (myIsInitialized, "OpenGl_Context::Init() should be called only once!");
651 #if defined(HAVE_EGL)
652 myWindow = theEglSurface;
653 myGContext = theEglContext;
654 myDisplay = theEglDisplay;
655 #elif defined(_WIN32)
656 myWindow = theWindow;
657 myGContext = theGContext;
658 myWindowDC = theWindowDC;
659 #elif defined(__APPLE__) && !defined(MACOSX_USE_GLX)
660 myGContext = (void* )theGContext;
662 myWindow = theWindow;
663 myGContext = theGContext;
664 myDisplay = theDisplay;
666 if (myGContext == NULL || !MakeCurrent())
668 return Standard_False;
672 myIsInitialized = Standard_True;
673 return Standard_True;
676 // =======================================================================
677 // function : ResetErrors
679 // =======================================================================
680 void OpenGl_Context::ResetErrors()
682 while (glGetError() != GL_NO_ERROR)
688 // =======================================================================
689 // function : readGlVersion
691 // =======================================================================
692 void OpenGl_Context::readGlVersion()
698 #ifdef GL_MAJOR_VERSION
699 // available since OpenGL 3.0 and OpenGL 3.0 ES
700 GLint aMajor = 0, aMinor = 0;
701 glGetIntegerv (GL_MAJOR_VERSION, &aMajor);
702 glGetIntegerv (GL_MINOR_VERSION, &aMinor);
703 // glGetError() sometimes does not report an error here even if
704 // GL does not know GL_MAJOR_VERSION and GL_MINOR_VERSION constants.
705 // This happens on some renderers like e.g. Cygwin MESA.
706 // Thus checking additionally if GL has put anything to
707 // the output variables.
708 if (glGetError() == GL_NO_ERROR && aMajor != 0 && aMinor != 0)
710 myGlVerMajor = aMajor;
711 myGlVerMinor = aMinor;
717 // Read version string.
718 // Notice that only first two numbers split by point '2.1 XXXXX' are significant.
719 // Following trash (after space) is vendor-specific.
720 // New drivers also returns micro version of GL like '3.3.0' which has no meaning
721 // and should be considered as vendor-specific too.
722 const char* aVerStr = (const char* )glGetString (GL_VERSION);
723 if (aVerStr == NULL || *aVerStr == '\0')
725 // invalid GL context
729 //#if defined(GL_ES_VERSION_2_0)
730 // skip "OpenGL ES-** " section
731 for (; *aVerStr != '\0'; ++aVerStr)
733 if (*aVerStr >= '0' && *aVerStr <= '9')
740 // parse string for major number
744 while (aVerStr[aMajIter] >= '0' && aVerStr[aMajIter] <= '9')
748 if (aMajIter == 0 || aMajIter >= sizeof(aMajorStr))
752 memcpy (aMajorStr, aVerStr, aMajIter);
753 aMajorStr[aMajIter] = '\0';
755 // parse string for minor number
756 aVerStr += aMajIter + 1;
758 while (aVerStr[aMinIter] >= '0' && aVerStr[aMinIter] <= '9')
762 if (aMinIter == 0 || aMinIter >= sizeof(aMinorStr))
766 memcpy (aMinorStr, aVerStr, aMinIter);
767 aMinorStr[aMinIter] = '\0';
770 myGlVerMajor = atoi (aMajorStr);
771 myGlVerMinor = atoi (aMinorStr);
773 if (myGlVerMajor <= 0)
780 static Standard_CString THE_DBGMSG_UNKNOWN = "UNKNOWN";
781 static Standard_CString THE_DBGMSG_SOURCES[] =
783 ".OpenGL", // GL_DEBUG_SOURCE_API_ARB
784 ".WinSystem", // GL_DEBUG_SOURCE_WINDOW_SYSTEM_ARB
785 ".GLSL", // GL_DEBUG_SOURCE_SHADER_COMPILER_ARB
786 ".3rdParty", // GL_DEBUG_SOURCE_THIRD_PARTY_ARB
787 "", // GL_DEBUG_SOURCE_APPLICATION_ARB
788 ".Other" // GL_DEBUG_SOURCE_OTHER_ARB
791 static Standard_CString THE_DBGMSG_TYPES[] =
793 "Error", // GL_DEBUG_TYPE_ERROR_ARB
794 "Deprecated", // GL_DEBUG_TYPE_DEPRECATED_BEHAVIOR_ARB
795 "Undef. behavior", // GL_DEBUG_TYPE_UNDEFINED_BEHAVIOR_ARB
796 "Portability", // GL_DEBUG_TYPE_PORTABILITY_ARB
797 "Performance", // GL_DEBUG_TYPE_PERFORMANCE_ARB
798 "Other" // GL_DEBUG_TYPE_OTHER_ARB
801 static Standard_CString THE_DBGMSG_SEV_HIGH = "High"; // GL_DEBUG_SEVERITY_HIGH_ARB
802 static Standard_CString THE_DBGMSG_SEV_MEDIUM = "Medium"; // GL_DEBUG_SEVERITY_MEDIUM_ARB
803 static Standard_CString THE_DBGMSG_SEV_LOW = "Low"; // GL_DEBUG_SEVERITY_LOW_ARB
805 #if !defined(GL_ES_VERSION_2_0)
806 //! Callback for GL_ARB_debug_output extension
807 static void APIENTRY debugCallbackWrap(unsigned int theSource,
808 unsigned int theType,
810 unsigned int theSeverity,
812 const char* theMessage,
813 const void* theUserParam)
815 OpenGl_Context* aCtx = (OpenGl_Context* )theUserParam;
816 aCtx->PushMessage (theSource, theType, theId, theSeverity, theMessage);
820 // =======================================================================
821 // function : PushMessage
823 // =======================================================================
824 void OpenGl_Context::PushMessage (const unsigned int theSource,
825 const unsigned int theType,
826 const unsigned int theId,
827 const unsigned int theSeverity,
828 const TCollection_ExtendedString& theMessage)
830 //OpenGl_Context* aCtx = (OpenGl_Context* )theUserParam;
831 Standard_CString& aSrc = (theSource >= GL_DEBUG_SOURCE_API_ARB
832 && theSource <= GL_DEBUG_SOURCE_OTHER_ARB)
833 ? THE_DBGMSG_SOURCES[theSource - GL_DEBUG_SOURCE_API_ARB]
834 : THE_DBGMSG_UNKNOWN;
835 Standard_CString& aType = (theType >= GL_DEBUG_TYPE_ERROR_ARB
836 && theType <= GL_DEBUG_TYPE_OTHER_ARB)
837 ? THE_DBGMSG_TYPES[theType - GL_DEBUG_TYPE_ERROR_ARB]
838 : THE_DBGMSG_UNKNOWN;
839 Standard_CString& aSev = theSeverity == GL_DEBUG_SEVERITY_HIGH_ARB
840 ? THE_DBGMSG_SEV_HIGH
841 : (theSeverity == GL_DEBUG_SEVERITY_MEDIUM_ARB
842 ? THE_DBGMSG_SEV_MEDIUM
843 : THE_DBGMSG_SEV_LOW);
844 Message_Gravity aGrav = theSeverity == GL_DEBUG_SEVERITY_HIGH_ARB
846 : (theSeverity == GL_DEBUG_SEVERITY_MEDIUM_ARB
850 TCollection_ExtendedString aMsg;
851 aMsg += "TKOpenGl"; aMsg += aSrc;
852 aMsg += " | Type: "; aMsg += aType;
853 aMsg += " | ID: "; aMsg += (Standard_Integer )theId;
854 aMsg += " | Severity: "; aMsg += aSev;
855 aMsg += " | Message:\n ";
857 Messenger()->Send (aMsg, aGrav);
860 // =======================================================================
863 // =======================================================================
864 void OpenGl_Context::init()
869 core11 = (OpenGl_GlCore11* )(&(*myFuncs));
870 core11fwd = (OpenGl_GlCore11Fwd* )(&(*myFuncs));
888 arbTboRGB32 = Standard_False;
894 #if defined(GL_ES_VERSION_2_0)
896 hasTexRGBA8 = IsGlGreaterEqual (3, 0)
897 || CheckExtension ("GL_OES_rgb8_rgba8");
898 // NPOT textures has limited support within OpenGL ES 2.0
899 // which are relaxed by OpenGL ES 3.0 or some extensions
900 //arbNPTW = IsGlGreaterEqual (3, 0)
901 // || CheckExtension ("GL_OES_texture_npot")
902 // || CheckExtension ("GL_NV_texture_npot_2D_mipmap");
903 arbNPTW = Standard_True;
904 arbTexRG = IsGlGreaterEqual (3, 0)
905 || CheckExtension ("GL_EXT_texture_rg");
906 extBgra = CheckExtension ("GL_EXT_texture_format_BGRA8888");
907 extAnis = CheckExtension ("GL_EXT_texture_filter_anisotropic");
908 extPDS = CheckExtension ("GL_OES_packed_depth_stencil");
910 core11fwd = (OpenGl_GlCore11Fwd* )(&(*myFuncs));
911 if (IsGlGreaterEqual (2, 0))
913 // enable compatible functions
914 core20 = (OpenGl_GlCore20* )(&(*myFuncs));
915 core20fwd = (OpenGl_GlCore20Fwd* )(&(*myFuncs));
916 core15fwd = (OpenGl_GlCore15Fwd* )(&(*myFuncs));
917 arbFBO = (OpenGl_ArbFBO* )(&(*myFuncs));
920 hasHighp = CheckExtension ("OES_fragment_precision_high");
921 GLint aRange[2] = {0, 0};
922 GLint aPrec [2] = {0, 0};
923 ::glGetShaderPrecisionFormat (GL_FRAGMENT_SHADER, GL_HIGH_FLOAT, aRange, aPrec);
926 hasHighp = Standard_True;
930 myTexClamp = IsGlGreaterEqual (1, 2) ? GL_CLAMP_TO_EDGE : GL_CLAMP;
932 hasTexRGBA8 = Standard_True;
933 arbNPTW = CheckExtension ("GL_ARB_texture_non_power_of_two");
934 extBgra = CheckExtension ("GL_EXT_bgra");
935 extAnis = CheckExtension ("GL_EXT_texture_filter_anisotropic");
936 extPDS = CheckExtension ("GL_EXT_packed_depth_stencil");
937 atiMem = CheckExtension ("GL_ATI_meminfo");
938 nvxMem = CheckExtension ("GL_NVX_gpu_memory_info");
940 GLint aStereo = GL_FALSE;
941 glGetIntegerv (GL_STEREO, &aStereo);
942 myIsStereoBuffers = aStereo == 1;
944 // get number of maximum clipping planes
945 glGetIntegerv (GL_MAX_CLIP_PLANES, &myMaxClipPlanes);
948 glGetIntegerv (GL_MAX_TEXTURE_SIZE, &myMaxTexDim);
952 glGetIntegerv (GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &myAnisoMax);
955 myClippingState.Init (myMaxClipPlanes);
957 #if !defined(GL_ES_VERSION_2_0)
975 //! Make record shorter to retrieve function pointer using variable with same name
976 #define FindProcShort(theFunc) FindProc(#theFunc, myFuncs->theFunc)
978 // retrieve platform-dependent extensions
979 #if defined(_WIN32) && !defined(HAVE_EGL)
980 if (FindProcShort (wglGetExtensionsStringARB))
982 const char* aWglExts = myFuncs->wglGetExtensionsStringARB (wglGetCurrentDC());
983 if (CheckExtension (aWglExts, "WGL_EXT_swap_control"))
985 FindProcShort (wglSwapIntervalEXT);
987 if (CheckExtension (aWglExts, "WGL_ARB_pixel_format"))
989 FindProcShort (wglChoosePixelFormatARB);
991 if (CheckExtension (aWglExts, "WGL_ARB_create_context_profile"))
993 FindProcShort (wglCreateContextAttribsARB);
995 if (CheckExtension (aWglExts, "WGL_NV_DX_interop"))
997 FindProcShort (wglDXSetResourceShareHandleNV);
998 FindProcShort (wglDXOpenDeviceNV);
999 FindProcShort (wglDXCloseDeviceNV);
1000 FindProcShort (wglDXRegisterObjectNV);
1001 FindProcShort (wglDXUnregisterObjectNV);
1002 FindProcShort (wglDXObjectAccessNV);
1003 FindProcShort (wglDXLockObjectsNV);
1004 FindProcShort (wglDXUnlockObjectsNV);
1009 // initialize debug context extension
1010 if (CheckExtension ("GL_ARB_debug_output"))
1013 if (FindProcShort (glDebugMessageControlARB)
1014 && FindProcShort (glDebugMessageInsertARB)
1015 && FindProcShort (glDebugMessageCallbackARB)
1016 && FindProcShort (glGetDebugMessageLogARB))
1018 arbDbg = (OpenGl_ArbDbg* )(&(*myFuncs));
1021 && caps->contextDebug)
1023 // setup default callback
1024 arbDbg->glDebugMessageCallbackARB (debugCallbackWrap, this);
1026 glEnable (GL_DEBUG_OUTPUT_SYNCHRONOUS_ARB);
1031 // load OpenGL 1.2 new functions
1032 has12 = IsGlGreaterEqual (1, 2)
1033 && FindProcShort (glBlendColor)
1034 && FindProcShort (glBlendEquation)
1035 && FindProcShort (glDrawRangeElements)
1036 && FindProcShort (glTexImage3D)
1037 && FindProcShort (glTexSubImage3D)
1038 && FindProcShort (glCopyTexSubImage3D);
1040 // load OpenGL 1.3 new functions
1041 has13 = IsGlGreaterEqual (1, 3)
1042 && FindProcShort (glActiveTexture)
1043 && FindProcShort (glSampleCoverage)
1044 && FindProcShort (glCompressedTexImage3D)
1045 && FindProcShort (glCompressedTexImage2D)
1046 && FindProcShort (glCompressedTexImage1D)
1047 && FindProcShort (glCompressedTexSubImage3D)
1048 && FindProcShort (glCompressedTexSubImage2D)
1049 && FindProcShort (glCompressedTexSubImage1D)
1050 && FindProcShort (glGetCompressedTexImage)
1051 && FindProcShort (glClientActiveTexture)
1052 && FindProcShort (glMultiTexCoord1d)
1053 && FindProcShort (glMultiTexCoord1dv)
1054 && FindProcShort (glMultiTexCoord1f)
1055 && FindProcShort (glMultiTexCoord1fv)
1056 && FindProcShort (glMultiTexCoord1i)
1057 && FindProcShort (glMultiTexCoord1iv)
1058 && FindProcShort (glMultiTexCoord1s)
1059 && FindProcShort (glMultiTexCoord1sv)
1060 && FindProcShort (glMultiTexCoord2d)
1061 && FindProcShort (glMultiTexCoord2dv)
1062 && FindProcShort (glMultiTexCoord2f)
1063 && FindProcShort (glMultiTexCoord2fv)
1064 && FindProcShort (glMultiTexCoord2i)
1065 && FindProcShort (glMultiTexCoord2iv)
1066 && FindProcShort (glMultiTexCoord2s)
1067 && FindProcShort (glMultiTexCoord2sv)
1068 && FindProcShort (glMultiTexCoord3d)
1069 && FindProcShort (glMultiTexCoord3dv)
1070 && FindProcShort (glMultiTexCoord3f)
1071 && FindProcShort (glMultiTexCoord3fv)
1072 && FindProcShort (glMultiTexCoord3i)
1073 && FindProcShort (glMultiTexCoord3iv)
1074 && FindProcShort (glMultiTexCoord3s)
1075 && FindProcShort (glMultiTexCoord3sv)
1076 && FindProcShort (glMultiTexCoord4d)
1077 && FindProcShort (glMultiTexCoord4dv)
1078 && FindProcShort (glMultiTexCoord4f)
1079 && FindProcShort (glMultiTexCoord4fv)
1080 && FindProcShort (glMultiTexCoord4i)
1081 && FindProcShort (glMultiTexCoord4iv)
1082 && FindProcShort (glMultiTexCoord4s)
1083 && FindProcShort (glMultiTexCoord4sv)
1084 && FindProcShort (glLoadTransposeMatrixf)
1085 && FindProcShort (glLoadTransposeMatrixd)
1086 && FindProcShort (glMultTransposeMatrixf)
1087 && FindProcShort (glMultTransposeMatrixd);
1089 // load OpenGL 1.4 new functions
1090 has14 = IsGlGreaterEqual (1, 4)
1091 && FindProcShort (glBlendFuncSeparate)
1092 && FindProcShort (glMultiDrawArrays)
1093 && FindProcShort (glMultiDrawElements)
1094 && FindProcShort (glPointParameterf)
1095 && FindProcShort (glPointParameterfv)
1096 && FindProcShort (glPointParameteri)
1097 && FindProcShort (glPointParameteriv);
1099 // load OpenGL 1.5 new functions
1100 has15 = IsGlGreaterEqual (1, 5)
1101 && FindProcShort (glGenQueries)
1102 && FindProcShort (glDeleteQueries)
1103 && FindProcShort (glIsQuery)
1104 && FindProcShort (glBeginQuery)
1105 && FindProcShort (glEndQuery)
1106 && FindProcShort (glGetQueryiv)
1107 && FindProcShort (glGetQueryObjectiv)
1108 && FindProcShort (glGetQueryObjectuiv)
1109 && FindProcShort (glBindBuffer)
1110 && FindProcShort (glDeleteBuffers)
1111 && FindProcShort (glGenBuffers)
1112 && FindProcShort (glIsBuffer)
1113 && FindProcShort (glBufferData)
1114 && FindProcShort (glBufferSubData)
1115 && FindProcShort (glGetBufferSubData)
1116 && FindProcShort (glMapBuffer)
1117 && FindProcShort (glUnmapBuffer)
1118 && FindProcShort (glGetBufferParameteriv)
1119 && FindProcShort (glGetBufferPointerv);
1121 // load OpenGL 2.0 new functions
1122 has20 = IsGlGreaterEqual (2, 0)
1123 && FindProcShort (glBlendEquationSeparate)
1124 && FindProcShort (glDrawBuffers)
1125 && FindProcShort (glStencilOpSeparate)
1126 && FindProcShort (glStencilFuncSeparate)
1127 && FindProcShort (glStencilMaskSeparate)
1128 && FindProcShort (glAttachShader)
1129 && FindProcShort (glBindAttribLocation)
1130 && FindProcShort (glCompileShader)
1131 && FindProcShort (glCreateProgram)
1132 && FindProcShort (glCreateShader)
1133 && FindProcShort (glDeleteProgram)
1134 && FindProcShort (glDeleteShader)
1135 && FindProcShort (glDetachShader)
1136 && FindProcShort (glDisableVertexAttribArray)
1137 && FindProcShort (glEnableVertexAttribArray)
1138 && FindProcShort (glGetActiveAttrib)
1139 && FindProcShort (glGetActiveUniform)
1140 && FindProcShort (glGetAttachedShaders)
1141 && FindProcShort (glGetAttribLocation)
1142 && FindProcShort (glGetProgramiv)
1143 && FindProcShort (glGetProgramInfoLog)
1144 && FindProcShort (glGetShaderiv)
1145 && FindProcShort (glGetShaderInfoLog)
1146 && FindProcShort (glGetShaderSource)
1147 && FindProcShort (glGetUniformLocation)
1148 && FindProcShort (glGetUniformfv)
1149 && FindProcShort (glGetUniformiv)
1150 && FindProcShort (glGetVertexAttribdv)
1151 && FindProcShort (glGetVertexAttribfv)
1152 && FindProcShort (glGetVertexAttribiv)
1153 && FindProcShort (glGetVertexAttribPointerv)
1154 && FindProcShort (glIsProgram)
1155 && FindProcShort (glIsShader)
1156 && FindProcShort (glLinkProgram)
1157 && FindProcShort (glShaderSource)
1158 && FindProcShort (glUseProgram)
1159 && FindProcShort (glUniform1f)
1160 && FindProcShort (glUniform2f)
1161 && FindProcShort (glUniform3f)
1162 && FindProcShort (glUniform4f)
1163 && FindProcShort (glUniform1i)
1164 && FindProcShort (glUniform2i)
1165 && FindProcShort (glUniform3i)
1166 && FindProcShort (glUniform4i)
1167 && FindProcShort (glUniform1fv)
1168 && FindProcShort (glUniform2fv)
1169 && FindProcShort (glUniform3fv)
1170 && FindProcShort (glUniform4fv)
1171 && FindProcShort (glUniform1iv)
1172 && FindProcShort (glUniform2iv)
1173 && FindProcShort (glUniform3iv)
1174 && FindProcShort (glUniform4iv)
1175 && FindProcShort (glUniformMatrix2fv)
1176 && FindProcShort (glUniformMatrix3fv)
1177 && FindProcShort (glUniformMatrix4fv)
1178 && FindProcShort (glValidateProgram)
1179 && FindProcShort (glVertexAttrib1d)
1180 && FindProcShort (glVertexAttrib1dv)
1181 && FindProcShort (glVertexAttrib1f)
1182 && FindProcShort (glVertexAttrib1fv)
1183 && FindProcShort (glVertexAttrib1s)
1184 && FindProcShort (glVertexAttrib1sv)
1185 && FindProcShort (glVertexAttrib2d)
1186 && FindProcShort (glVertexAttrib2dv)
1187 && FindProcShort (glVertexAttrib2f)
1188 && FindProcShort (glVertexAttrib2fv)
1189 && FindProcShort (glVertexAttrib2s)
1190 && FindProcShort (glVertexAttrib2sv)
1191 && FindProcShort (glVertexAttrib3d)
1192 && FindProcShort (glVertexAttrib3dv)
1193 && FindProcShort (glVertexAttrib3f)
1194 && FindProcShort (glVertexAttrib3fv)
1195 && FindProcShort (glVertexAttrib3s)
1196 && FindProcShort (glVertexAttrib3sv)
1197 && FindProcShort (glVertexAttrib4Nbv)
1198 && FindProcShort (glVertexAttrib4Niv)
1199 && FindProcShort (glVertexAttrib4Nsv)
1200 && FindProcShort (glVertexAttrib4Nub)
1201 && FindProcShort (glVertexAttrib4Nubv)
1202 && FindProcShort (glVertexAttrib4Nuiv)
1203 && FindProcShort (glVertexAttrib4Nusv)
1204 && FindProcShort (glVertexAttrib4bv)
1205 && FindProcShort (glVertexAttrib4d)
1206 && FindProcShort (glVertexAttrib4dv)
1207 && FindProcShort (glVertexAttrib4f)
1208 && FindProcShort (glVertexAttrib4fv)
1209 && FindProcShort (glVertexAttrib4iv)
1210 && FindProcShort (glVertexAttrib4s)
1211 && FindProcShort (glVertexAttrib4sv)
1212 && FindProcShort (glVertexAttrib4ubv)
1213 && FindProcShort (glVertexAttrib4uiv)
1214 && FindProcShort (glVertexAttrib4usv)
1215 && FindProcShort (glVertexAttribPointer);
1217 // load OpenGL 2.1 new functions
1218 has21 = IsGlGreaterEqual (2, 1)
1219 && FindProcShort (glUniformMatrix2x3fv)
1220 && FindProcShort (glUniformMatrix3x2fv)
1221 && FindProcShort (glUniformMatrix2x4fv)
1222 && FindProcShort (glUniformMatrix4x2fv)
1223 && FindProcShort (glUniformMatrix3x4fv)
1224 && FindProcShort (glUniformMatrix4x3fv);
1226 // load GL_ARB_framebuffer_object (added to OpenGL 3.0 core)
1227 const bool hasFBO = (IsGlGreaterEqual (3, 0) || CheckExtension ("GL_ARB_framebuffer_object"))
1228 && FindProcShort (glIsRenderbuffer)
1229 && FindProcShort (glBindRenderbuffer)
1230 && FindProcShort (glDeleteRenderbuffers)
1231 && FindProcShort (glGenRenderbuffers)
1232 && FindProcShort (glRenderbufferStorage)
1233 && FindProcShort (glGetRenderbufferParameteriv)
1234 && FindProcShort (glIsFramebuffer)
1235 && FindProcShort (glBindFramebuffer)
1236 && FindProcShort (glDeleteFramebuffers)
1237 && FindProcShort (glGenFramebuffers)
1238 && FindProcShort (glCheckFramebufferStatus)
1239 && FindProcShort (glFramebufferTexture1D)
1240 && FindProcShort (glFramebufferTexture2D)
1241 && FindProcShort (glFramebufferTexture3D)
1242 && FindProcShort (glFramebufferRenderbuffer)
1243 && FindProcShort (glGetFramebufferAttachmentParameteriv)
1244 && FindProcShort (glGenerateMipmap)
1245 && FindProcShort (glBlitFramebuffer)
1246 && FindProcShort (glRenderbufferStorageMultisample)
1247 && FindProcShort (glFramebufferTextureLayer);
1249 // load GL_ARB_vertex_array_object (added to OpenGL 3.0 core)
1250 const bool hasVAO = (IsGlGreaterEqual (3, 0) || CheckExtension ("GL_ARB_vertex_array_object"))
1251 && FindProcShort (glBindVertexArray)
1252 && FindProcShort (glDeleteVertexArrays)
1253 && FindProcShort (glGenVertexArrays)
1254 && FindProcShort (glIsVertexArray);
1256 // load GL_ARB_map_buffer_range (added to OpenGL 3.0 core)
1257 const bool hasMapBufferRange = (IsGlGreaterEqual (3, 0) || CheckExtension ("GL_ARB_map_buffer_range"))
1258 && FindProcShort (glMapBufferRange)
1259 && FindProcShort (glFlushMappedBufferRange);
1261 // load OpenGL 3.0 new functions
1262 has30 = IsGlGreaterEqual (3, 0)
1265 && hasMapBufferRange
1266 && FindProcShort (glColorMaski)
1267 && FindProcShort (glGetBooleani_v)
1268 && FindProcShort (glGetIntegeri_v)
1269 && FindProcShort (glEnablei)
1270 && FindProcShort (glDisablei)
1271 && FindProcShort (glIsEnabledi)
1272 && FindProcShort (glBeginTransformFeedback)
1273 && FindProcShort (glEndTransformFeedback)
1274 && FindProcShort (glBindBufferRange)
1275 && FindProcShort (glBindBufferBase)
1276 && FindProcShort (glTransformFeedbackVaryings)
1277 && FindProcShort (glGetTransformFeedbackVarying)
1278 && FindProcShort (glClampColor)
1279 && FindProcShort (glBeginConditionalRender)
1280 && FindProcShort (glEndConditionalRender)
1281 && FindProcShort (glVertexAttribIPointer)
1282 && FindProcShort (glGetVertexAttribIiv)
1283 && FindProcShort (glGetVertexAttribIuiv)
1284 && FindProcShort (glVertexAttribI1i)
1285 && FindProcShort (glVertexAttribI2i)
1286 && FindProcShort (glVertexAttribI3i)
1287 && FindProcShort (glVertexAttribI4i)
1288 && FindProcShort (glVertexAttribI1ui)
1289 && FindProcShort (glVertexAttribI2ui)
1290 && FindProcShort (glVertexAttribI3ui)
1291 && FindProcShort (glVertexAttribI4ui)
1292 && FindProcShort (glVertexAttribI1iv)
1293 && FindProcShort (glVertexAttribI2iv)
1294 && FindProcShort (glVertexAttribI3iv)
1295 && FindProcShort (glVertexAttribI4iv)
1296 && FindProcShort (glVertexAttribI1uiv)
1297 && FindProcShort (glVertexAttribI2uiv)
1298 && FindProcShort (glVertexAttribI3uiv)
1299 && FindProcShort (glVertexAttribI4uiv)
1300 && FindProcShort (glVertexAttribI4bv)
1301 && FindProcShort (glVertexAttribI4sv)
1302 && FindProcShort (glVertexAttribI4ubv)
1303 && FindProcShort (glVertexAttribI4usv)
1304 && FindProcShort (glGetUniformuiv)
1305 && FindProcShort (glBindFragDataLocation)
1306 && FindProcShort (glGetFragDataLocation)
1307 && FindProcShort (glUniform1ui)
1308 && FindProcShort (glUniform2ui)
1309 && FindProcShort (glUniform3ui)
1310 && FindProcShort (glUniform4ui)
1311 && FindProcShort (glUniform1uiv)
1312 && FindProcShort (glUniform2uiv)
1313 && FindProcShort (glUniform3uiv)
1314 && FindProcShort (glUniform4uiv)
1315 && FindProcShort (glTexParameterIiv)
1316 && FindProcShort (glTexParameterIuiv)
1317 && FindProcShort (glGetTexParameterIiv)
1318 && FindProcShort (glGetTexParameterIuiv)
1319 && FindProcShort (glClearBufferiv)
1320 && FindProcShort (glClearBufferuiv)
1321 && FindProcShort (glClearBufferfv)
1322 && FindProcShort (glClearBufferfi)
1323 && FindProcShort (glGetStringi);
1325 // load GL_ARB_uniform_buffer_object (added to OpenGL 3.1 core)
1326 const bool hasUBO = (IsGlGreaterEqual (3, 1) || CheckExtension ("GL_ARB_uniform_buffer_object"))
1327 && FindProcShort (glGetUniformIndices)
1328 && FindProcShort (glGetActiveUniformsiv)
1329 && FindProcShort (glGetActiveUniformName)
1330 && FindProcShort (glGetUniformBlockIndex)
1331 && FindProcShort (glGetActiveUniformBlockiv)
1332 && FindProcShort (glGetActiveUniformBlockName)
1333 && FindProcShort (glUniformBlockBinding);
1335 // load GL_ARB_copy_buffer (added to OpenGL 3.1 core)
1336 const bool hasCopyBufSubData = (IsGlGreaterEqual (3, 1) || CheckExtension ("GL_ARB_copy_buffer"))
1337 && FindProcShort (glCopyBufferSubData);
1341 // NPOT textures are required by OpenGL 2.0 specifications
1342 // but doesn't hardware accelerated by some ancient OpenGL 2.1 hardware (GeForce FX, RadeOn 9700 etc.)
1343 arbNPTW = Standard_True;
1344 arbTexRG = Standard_True;
1347 // load OpenGL 3.1 new functions
1348 has31 = IsGlGreaterEqual (3, 1)
1350 && hasCopyBufSubData
1351 && FindProcShort (glDrawArraysInstanced)
1352 && FindProcShort (glDrawElementsInstanced)
1353 && FindProcShort (glTexBuffer)
1354 && FindProcShort (glPrimitiveRestartIndex);
1356 // load GL_ARB_draw_elements_base_vertex (added to OpenGL 3.2 core)
1357 const bool hasDrawElemsBaseVert = (IsGlGreaterEqual (3, 2) || CheckExtension ("GL_ARB_draw_elements_base_vertex"))
1358 && FindProcShort (glDrawElementsBaseVertex)
1359 && FindProcShort (glDrawRangeElementsBaseVertex)
1360 && FindProcShort (glDrawElementsInstancedBaseVertex)
1361 && FindProcShort (glMultiDrawElementsBaseVertex);
1363 // load GL_ARB_provoking_vertex (added to OpenGL 3.2 core)
1364 const bool hasProvokingVert = (IsGlGreaterEqual (3, 2) || CheckExtension ("GL_ARB_provoking_vertex"))
1365 && FindProcShort (glProvokingVertex);
1367 // load GL_ARB_sync (added to OpenGL 3.2 core)
1368 const bool hasSync = (IsGlGreaterEqual (3, 2) || CheckExtension ("GL_ARB_sync"))
1369 && FindProcShort (glFenceSync)
1370 && FindProcShort (glIsSync)
1371 && FindProcShort (glDeleteSync)
1372 && FindProcShort (glClientWaitSync)
1373 && FindProcShort (glWaitSync)
1374 && FindProcShort (glGetInteger64v)
1375 && FindProcShort (glGetSynciv);
1377 // load GL_ARB_texture_multisample (added to OpenGL 3.2 core)
1378 const bool hasTextureMultisample = (IsGlGreaterEqual (3, 2) || CheckExtension ("GL_ARB_texture_multisample"))
1379 && FindProcShort (glTexImage2DMultisample)
1380 && FindProcShort (glTexImage3DMultisample)
1381 && FindProcShort (glGetMultisamplefv)
1382 && FindProcShort (glSampleMaski);
1384 // load OpenGL 3.2 new functions
1385 has32 = IsGlGreaterEqual (3, 2)
1386 && hasDrawElemsBaseVert
1389 && hasTextureMultisample
1390 && FindProcShort (glGetInteger64i_v)
1391 && FindProcShort (glGetBufferParameteri64v)
1392 && FindProcShort (glFramebufferTexture);
1394 // load GL_ARB_blend_func_extended (added to OpenGL 3.3 core)
1395 const bool hasBlendFuncExtended = (IsGlGreaterEqual (3, 3) || CheckExtension ("GL_ARB_blend_func_extended"))
1396 && FindProcShort (glBindFragDataLocationIndexed)
1397 && FindProcShort (glGetFragDataIndex);
1399 // load GL_ARB_sampler_objects (added to OpenGL 3.3 core)
1400 const bool hasSamplerObjects = (IsGlGreaterEqual (3, 3) || CheckExtension ("GL_ARB_sampler_objects"))
1401 && FindProcShort (glGenSamplers)
1402 && FindProcShort (glDeleteSamplers)
1403 && FindProcShort (glIsSampler)
1404 && FindProcShort (glBindSampler)
1405 && FindProcShort (glSamplerParameteri)
1406 && FindProcShort (glSamplerParameteriv)
1407 && FindProcShort (glSamplerParameterf)
1408 && FindProcShort (glSamplerParameterfv)
1409 && FindProcShort (glSamplerParameterIiv)
1410 && FindProcShort (glSamplerParameterIuiv)
1411 && FindProcShort (glGetSamplerParameteriv)
1412 && FindProcShort (glGetSamplerParameterIiv)
1413 && FindProcShort (glGetSamplerParameterfv)
1414 && FindProcShort (glGetSamplerParameterIuiv);
1416 // load GL_ARB_timer_query (added to OpenGL 3.3 core)
1417 const bool hasTimerQuery = (IsGlGreaterEqual (3, 3) || CheckExtension ("GL_ARB_timer_query"))
1418 && FindProcShort (glQueryCounter)
1419 && FindProcShort (glGetQueryObjecti64v)
1420 && FindProcShort (glGetQueryObjectui64v);
1422 // load GL_ARB_vertex_type_2_10_10_10_rev (added to OpenGL 3.3 core)
1423 const bool hasVertType21010101rev = (IsGlGreaterEqual (3, 3) || CheckExtension ("GL_ARB_vertex_type_2_10_10_10_rev"))
1424 && FindProcShort (glVertexP2ui)
1425 && FindProcShort (glVertexP2uiv)
1426 && FindProcShort (glVertexP3ui)
1427 && FindProcShort (glVertexP3uiv)
1428 && FindProcShort (glVertexP4ui)
1429 && FindProcShort (glVertexP4uiv)
1430 && FindProcShort (glTexCoordP1ui)
1431 && FindProcShort (glTexCoordP1uiv)
1432 && FindProcShort (glTexCoordP2ui)
1433 && FindProcShort (glTexCoordP2uiv)
1434 && FindProcShort (glTexCoordP3ui)
1435 && FindProcShort (glTexCoordP3uiv)
1436 && FindProcShort (glTexCoordP4ui)
1437 && FindProcShort (glTexCoordP4uiv)
1438 && FindProcShort (glMultiTexCoordP1ui)
1439 && FindProcShort (glMultiTexCoordP1uiv)
1440 && FindProcShort (glMultiTexCoordP2ui)
1441 && FindProcShort (glMultiTexCoordP2uiv)
1442 && FindProcShort (glMultiTexCoordP3ui)
1443 && FindProcShort (glMultiTexCoordP3uiv)
1444 && FindProcShort (glMultiTexCoordP4ui)
1445 && FindProcShort (glMultiTexCoordP4uiv)
1446 && FindProcShort (glNormalP3ui)
1447 && FindProcShort (glNormalP3uiv)
1448 && FindProcShort (glColorP3ui)
1449 && FindProcShort (glColorP3uiv)
1450 && FindProcShort (glColorP4ui)
1451 && FindProcShort (glColorP4uiv)
1452 && FindProcShort (glSecondaryColorP3ui)
1453 && FindProcShort (glSecondaryColorP3uiv)
1454 && FindProcShort (glVertexAttribP1ui)
1455 && FindProcShort (glVertexAttribP1uiv)
1456 && FindProcShort (glVertexAttribP2ui)
1457 && FindProcShort (glVertexAttribP2uiv)
1458 && FindProcShort (glVertexAttribP3ui)
1459 && FindProcShort (glVertexAttribP3uiv)
1460 && FindProcShort (glVertexAttribP4ui)
1461 && FindProcShort (glVertexAttribP4uiv);
1463 // load OpenGL 3.3 extra functions
1464 has33 = IsGlGreaterEqual (3, 3)
1465 && hasBlendFuncExtended
1466 && hasSamplerObjects
1468 && hasVertType21010101rev
1469 && FindProcShort (glVertexAttribDivisor);
1471 // load GL_ARB_draw_indirect (added to OpenGL 4.0 core)
1472 const bool hasDrawIndirect = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_draw_indirect"))
1473 && FindProcShort (glDrawArraysIndirect)
1474 && FindProcShort (glDrawElementsIndirect);
1476 // load GL_ARB_gpu_shader_fp64 (added to OpenGL 4.0 core)
1477 const bool hasShaderFP64 = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_gpu_shader_fp64"))
1478 && FindProcShort (glUniform1d)
1479 && FindProcShort (glUniform2d)
1480 && FindProcShort (glUniform3d)
1481 && FindProcShort (glUniform4d)
1482 && FindProcShort (glUniform1dv)
1483 && FindProcShort (glUniform2dv)
1484 && FindProcShort (glUniform3dv)
1485 && FindProcShort (glUniform4dv)
1486 && FindProcShort (glUniformMatrix2dv)
1487 && FindProcShort (glUniformMatrix3dv)
1488 && FindProcShort (glUniformMatrix4dv)
1489 && FindProcShort (glUniformMatrix2x3dv)
1490 && FindProcShort (glUniformMatrix2x4dv)
1491 && FindProcShort (glUniformMatrix3x2dv)
1492 && FindProcShort (glUniformMatrix3x4dv)
1493 && FindProcShort (glUniformMatrix4x2dv)
1494 && FindProcShort (glUniformMatrix4x3dv)
1495 && FindProcShort (glGetUniformdv);
1497 // load GL_ARB_shader_subroutine (added to OpenGL 4.0 core)
1498 const bool hasShaderSubroutine = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_shader_subroutine"))
1499 && FindProcShort (glGetSubroutineUniformLocation)
1500 && FindProcShort (glGetSubroutineIndex)
1501 && FindProcShort (glGetActiveSubroutineUniformiv)
1502 && FindProcShort (glGetActiveSubroutineUniformName)
1503 && FindProcShort (glGetActiveSubroutineName)
1504 && FindProcShort (glUniformSubroutinesuiv)
1505 && FindProcShort (glGetUniformSubroutineuiv)
1506 && FindProcShort (glGetProgramStageiv);
1508 // load GL_ARB_tessellation_shader (added to OpenGL 4.0 core)
1509 const bool hasTessellationShader = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_tessellation_shader"))
1510 && FindProcShort (glPatchParameteri)
1511 && FindProcShort (glPatchParameterfv);
1513 // load GL_ARB_transform_feedback2 (added to OpenGL 4.0 core)
1514 const bool hasTrsfFeedback2 = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_transform_feedback2"))
1515 && FindProcShort (glBindTransformFeedback)
1516 && FindProcShort (glDeleteTransformFeedbacks)
1517 && FindProcShort (glGenTransformFeedbacks)
1518 && FindProcShort (glIsTransformFeedback)
1519 && FindProcShort (glPauseTransformFeedback)
1520 && FindProcShort (glResumeTransformFeedback)
1521 && FindProcShort (glDrawTransformFeedback);
1523 // load GL_ARB_transform_feedback3 (added to OpenGL 4.0 core)
1524 const bool hasTrsfFeedback3 = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_transform_feedback3"))
1525 && FindProcShort (glDrawTransformFeedbackStream)
1526 && FindProcShort (glBeginQueryIndexed)
1527 && FindProcShort (glEndQueryIndexed)
1528 && FindProcShort (glGetQueryIndexediv);
1530 // load OpenGL 4.0 new functions
1531 has40 = IsGlGreaterEqual (4, 0)
1534 && hasShaderSubroutine
1535 && hasTessellationShader
1538 && FindProcShort (glMinSampleShading)
1539 && FindProcShort (glBlendEquationi)
1540 && FindProcShort (glBlendEquationSeparatei)
1541 && FindProcShort (glBlendFunci)
1542 && FindProcShort (glBlendFuncSeparatei);
1544 // load GL_ARB_ES2_compatibility (added to OpenGL 4.1 core)
1545 const bool hasES2Compatibility = (IsGlGreaterEqual (4, 1) || CheckExtension ("GL_ARB_ES2_compatibility"))
1546 && FindProcShort (glReleaseShaderCompiler)
1547 && FindProcShort (glShaderBinary)
1548 && FindProcShort (glGetShaderPrecisionFormat)
1549 && FindProcShort (glDepthRangef)
1550 && FindProcShort (glClearDepthf);
1552 // load GL_ARB_get_program_binary (added to OpenGL 4.1 core)
1553 const bool hasGetProgramBinary = (IsGlGreaterEqual (4, 1) || CheckExtension ("GL_ARB_get_program_binary"))
1554 && FindProcShort (glGetProgramBinary)
1555 && FindProcShort (glProgramBinary)
1556 && FindProcShort (glProgramParameteri);
1559 // load GL_ARB_separate_shader_objects (added to OpenGL 4.1 core)
1560 const bool hasSeparateShaderObjects = (IsGlGreaterEqual (4, 1) || CheckExtension ("GL_ARB_separate_shader_objects"))
1561 && FindProcShort (glUseProgramStages)
1562 && FindProcShort (glActiveShaderProgram)
1563 && FindProcShort (glCreateShaderProgramv)
1564 && FindProcShort (glBindProgramPipeline)
1565 && FindProcShort (glDeleteProgramPipelines)
1566 && FindProcShort (glGenProgramPipelines)
1567 && FindProcShort (glIsProgramPipeline)
1568 && FindProcShort (glGetProgramPipelineiv)
1569 && FindProcShort (glProgramUniform1i)
1570 && FindProcShort (glProgramUniform1iv)
1571 && FindProcShort (glProgramUniform1f)
1572 && FindProcShort (glProgramUniform1fv)
1573 && FindProcShort (glProgramUniform1d)
1574 && FindProcShort (glProgramUniform1dv)
1575 && FindProcShort (glProgramUniform1ui)
1576 && FindProcShort (glProgramUniform1uiv)
1577 && FindProcShort (glProgramUniform2i)
1578 && FindProcShort (glProgramUniform2iv)
1579 && FindProcShort (glProgramUniform2f)
1580 && FindProcShort (glProgramUniform2fv)
1581 && FindProcShort (glProgramUniform2d)
1582 && FindProcShort (glProgramUniform2dv)
1583 && FindProcShort (glProgramUniform2ui)
1584 && FindProcShort (glProgramUniform2uiv)
1585 && FindProcShort (glProgramUniform3i)
1586 && FindProcShort (glProgramUniform3iv)
1587 && FindProcShort (glProgramUniform3f)
1588 && FindProcShort (glProgramUniform3fv)
1589 && FindProcShort (glProgramUniform3d)
1590 && FindProcShort (glProgramUniform3dv)
1591 && FindProcShort (glProgramUniform3ui)
1592 && FindProcShort (glProgramUniform3uiv)
1593 && FindProcShort (glProgramUniform4i)
1594 && FindProcShort (glProgramUniform4iv)
1595 && FindProcShort (glProgramUniform4f)
1596 && FindProcShort (glProgramUniform4fv)
1597 && FindProcShort (glProgramUniform4d)
1598 && FindProcShort (glProgramUniform4dv)
1599 && FindProcShort (glProgramUniform4ui)
1600 && FindProcShort (glProgramUniform4uiv)
1601 && FindProcShort (glProgramUniformMatrix2fv)
1602 && FindProcShort (glProgramUniformMatrix3fv)
1603 && FindProcShort (glProgramUniformMatrix4fv)
1604 && FindProcShort (glProgramUniformMatrix2dv)
1605 && FindProcShort (glProgramUniformMatrix3dv)
1606 && FindProcShort (glProgramUniformMatrix4dv)
1607 && FindProcShort (glProgramUniformMatrix2x3fv)
1608 && FindProcShort (glProgramUniformMatrix3x2fv)
1609 && FindProcShort (glProgramUniformMatrix2x4fv)
1610 && FindProcShort (glProgramUniformMatrix4x2fv)
1611 && FindProcShort (glProgramUniformMatrix3x4fv)
1612 && FindProcShort (glProgramUniformMatrix4x3fv)
1613 && FindProcShort (glProgramUniformMatrix2x3dv)
1614 && FindProcShort (glProgramUniformMatrix3x2dv)
1615 && FindProcShort (glProgramUniformMatrix2x4dv)
1616 && FindProcShort (glProgramUniformMatrix4x2dv)
1617 && FindProcShort (glProgramUniformMatrix3x4dv)
1618 && FindProcShort (glProgramUniformMatrix4x3dv)
1619 && FindProcShort (glValidateProgramPipeline)
1620 && FindProcShort (glGetProgramPipelineInfoLog);
1622 // load GL_ARB_vertex_attrib_64bit (added to OpenGL 4.1 core)
1623 const bool hasVertAttrib64bit = (IsGlGreaterEqual (4, 1) || CheckExtension ("GL_ARB_vertex_attrib_64bit"))
1624 && FindProcShort (glVertexAttribL1d)
1625 && FindProcShort (glVertexAttribL2d)
1626 && FindProcShort (glVertexAttribL3d)
1627 && FindProcShort (glVertexAttribL4d)
1628 && FindProcShort (glVertexAttribL1dv)
1629 && FindProcShort (glVertexAttribL2dv)
1630 && FindProcShort (glVertexAttribL3dv)
1631 && FindProcShort (glVertexAttribL4dv)
1632 && FindProcShort (glVertexAttribLPointer)
1633 && FindProcShort (glGetVertexAttribLdv);
1635 // load GL_ARB_viewport_array (added to OpenGL 4.1 core)
1636 const bool hasViewportArray = (IsGlGreaterEqual (4, 1) || CheckExtension ("GL_ARB_viewport_array"))
1637 && FindProcShort (glViewportArrayv)
1638 && FindProcShort (glViewportIndexedf)
1639 && FindProcShort (glViewportIndexedfv)
1640 && FindProcShort (glScissorArrayv)
1641 && FindProcShort (glScissorIndexed)
1642 && FindProcShort (glScissorIndexedv)
1643 && FindProcShort (glDepthRangeArrayv)
1644 && FindProcShort (glDepthRangeIndexed)
1645 && FindProcShort (glGetFloati_v)
1646 && FindProcShort (glGetDoublei_v);
1648 has41 = IsGlGreaterEqual (4, 1)
1649 && hasES2Compatibility
1650 && hasGetProgramBinary
1651 && hasSeparateShaderObjects
1652 && hasVertAttrib64bit
1653 && hasViewportArray;
1655 // load GL_ARB_base_instance (added to OpenGL 4.2 core)
1656 const bool hasBaseInstance = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_base_instance"))
1657 && FindProcShort (glDrawArraysInstancedBaseInstance)
1658 && FindProcShort (glDrawElementsInstancedBaseInstance)
1659 && FindProcShort (glDrawElementsInstancedBaseVertexBaseInstance);
1661 // load GL_ARB_transform_feedback_instanced (added to OpenGL 4.2 core)
1662 const bool hasTrsfFeedbackInstanced = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_transform_feedback_instanced"))
1663 && FindProcShort (glDrawTransformFeedbackInstanced)
1664 && FindProcShort (glDrawTransformFeedbackStreamInstanced);
1666 // load GL_ARB_internalformat_query (added to OpenGL 4.2 core)
1667 const bool hasInternalFormatQuery = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_internalformat_query"))
1668 && FindProcShort (glGetInternalformativ);
1670 // load GL_ARB_shader_atomic_counters (added to OpenGL 4.2 core)
1671 const bool hasShaderAtomicCounters = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_shader_atomic_counters"))
1672 && FindProcShort (glGetActiveAtomicCounterBufferiv);
1674 // load GL_ARB_shader_image_load_store (added to OpenGL 4.2 core)
1675 const bool hasShaderImgLoadStore = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_shader_image_load_store"))
1676 && FindProcShort (glBindImageTexture)
1677 && FindProcShort (glMemoryBarrier);
1679 // load GL_ARB_texture_storage (added to OpenGL 4.2 core)
1680 const bool hasTextureStorage = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_texture_storage"))
1681 && FindProcShort (glTexStorage1D)
1682 && FindProcShort (glTexStorage2D)
1683 && FindProcShort (glTexStorage3D)
1684 && FindProcShort (glTextureStorage1DEXT)
1685 && FindProcShort (glTextureStorage2DEXT)
1686 && FindProcShort (glTextureStorage3DEXT);
1688 has42 = IsGlGreaterEqual (4, 2)
1690 && hasTrsfFeedbackInstanced
1691 && hasInternalFormatQuery
1692 && hasShaderAtomicCounters
1693 && hasShaderImgLoadStore
1694 && hasTextureStorage;
1696 has43 = IsGlGreaterEqual (4, 3)
1697 && FindProcShort (glClearBufferData)
1698 && FindProcShort (glClearBufferSubData)
1699 && FindProcShort (glDispatchCompute)
1700 && FindProcShort (glDispatchComputeIndirect)
1701 && FindProcShort (glCopyImageSubData)
1702 && FindProcShort (glFramebufferParameteri)
1703 && FindProcShort (glGetFramebufferParameteriv)
1704 && FindProcShort (glGetInternalformati64v)
1705 && FindProcShort (glInvalidateTexSubImage)
1706 && FindProcShort (glInvalidateTexImage)
1707 && FindProcShort (glInvalidateBufferSubData)
1708 && FindProcShort (glInvalidateBufferData)
1709 && FindProcShort (glInvalidateFramebuffer)
1710 && FindProcShort (glInvalidateSubFramebuffer)
1711 && FindProcShort (glMultiDrawArraysIndirect)
1712 && FindProcShort (glMultiDrawElementsIndirect)
1713 && FindProcShort (glGetProgramInterfaceiv)
1714 && FindProcShort (glGetProgramResourceIndex)
1715 && FindProcShort (glGetProgramResourceName)
1716 && FindProcShort (glGetProgramResourceiv)
1717 && FindProcShort (glGetProgramResourceLocation)
1718 && FindProcShort (glGetProgramResourceLocationIndex)
1719 && FindProcShort (glShaderStorageBlockBinding)
1720 && FindProcShort (glTexBufferRange)
1721 && FindProcShort (glTexStorage2DMultisample)
1722 && FindProcShort (glTexStorage3DMultisample)
1723 && FindProcShort (glTextureView)
1724 && FindProcShort (glBindVertexBuffer)
1725 && FindProcShort (glVertexAttribFormat)
1726 && FindProcShort (glVertexAttribIFormat)
1727 && FindProcShort (glVertexAttribLFormat)
1728 && FindProcShort (glVertexAttribBinding)
1729 && FindProcShort (glVertexBindingDivisor)
1730 && FindProcShort (glDebugMessageControl)
1731 && FindProcShort (glDebugMessageInsert)
1732 && FindProcShort (glDebugMessageCallback)
1733 && FindProcShort (glGetDebugMessageLog)
1734 && FindProcShort (glPushDebugGroup)
1735 && FindProcShort (glPopDebugGroup)
1736 && FindProcShort (glObjectLabel)
1737 && FindProcShort (glGetObjectLabel)
1738 && FindProcShort (glObjectPtrLabel)
1739 && FindProcShort (glGetObjectPtrLabel);
1741 // load GL_ARB_clear_texture (added to OpenGL 4.4 core)
1742 bool arbTexClear = (IsGlGreaterEqual (4, 4) || CheckExtension ("GL_ARB_clear_texture"))
1743 && FindProcShort (glClearTexImage)
1744 && FindProcShort (glClearTexSubImage);
1746 has44 = IsGlGreaterEqual (4, 4)
1748 && FindProcShort (glBufferStorage)
1749 && FindProcShort (glBindBuffersBase)
1750 && FindProcShort (glBindBuffersRange)
1751 && FindProcShort (glBindTextures)
1752 && FindProcShort (glBindSamplers)
1753 && FindProcShort (glBindImageTextures)
1754 && FindProcShort (glBindVertexBuffers);
1756 // initialize TBO extension (ARB)
1758 && CheckExtension ("GL_ARB_texture_buffer_object")
1759 && FindProc ("glTexBufferARB", myFuncs->glTexBuffer))
1761 arbTBO = (OpenGl_ArbTBO* )(&(*myFuncs));
1763 arbTboRGB32 = CheckExtension ("GL_ARB_texture_buffer_object_rgb32");
1765 // initialize hardware instancing extension (ARB)
1767 && CheckExtension ("GL_ARB_draw_instanced")
1768 && FindProc ("glDrawArraysInstancedARB", myFuncs->glDrawArraysInstanced)
1769 && FindProc ("glDrawElementsInstancedARB", myFuncs->glDrawElementsInstanced))
1771 arbIns = (OpenGl_ArbIns* )(&(*myFuncs));
1774 // initialize FBO extension (ARB)
1777 arbFBO = (OpenGl_ArbFBO* )(&(*myFuncs));
1778 extPDS = Standard_True; // extension for EXT, but part of ARB
1781 // initialize GS extension (EXT)
1782 if (CheckExtension ("GL_EXT_geometry_shader4")
1783 && FindProcShort (glProgramParameteriEXT))
1785 extGS = (OpenGl_ExtGS* )(&(*myFuncs));
1788 // initialize bindless texture extension (ARB)
1789 if (CheckExtension ("GL_ARB_bindless_texture")
1790 && FindProcShort (glGetTextureHandleARB)
1791 && FindProcShort (glGetTextureSamplerHandleARB)
1792 && FindProcShort (glMakeTextureHandleResidentARB)
1793 && FindProcShort (glMakeTextureHandleNonResidentARB)
1794 && FindProcShort (glGetImageHandleARB)
1795 && FindProcShort (glMakeImageHandleResidentARB)
1796 && FindProcShort (glMakeImageHandleNonResidentARB)
1797 && FindProcShort (glUniformHandleui64ARB)
1798 && FindProcShort (glUniformHandleui64vARB)
1799 && FindProcShort (glProgramUniformHandleui64ARB)
1800 && FindProcShort (glProgramUniformHandleui64vARB)
1801 && FindProcShort (glIsTextureHandleResidentARB)
1802 && FindProcShort (glIsImageHandleResidentARB)
1803 && FindProcShort (glVertexAttribL1ui64ARB)
1804 && FindProcShort (glVertexAttribL1ui64vARB)
1805 && FindProcShort (glGetVertexAttribLui64vARB))
1807 arbTexBindless = (OpenGl_ArbTexBindless* )(&(*myFuncs));
1834 core15 = (OpenGl_GlCore15* )(&(*myFuncs));
1835 core15fwd = (OpenGl_GlCore15Fwd* )(&(*myFuncs));
1844 core20 = (OpenGl_GlCore20* )(&(*myFuncs));
1845 core20fwd = (OpenGl_GlCore20Fwd* )(&(*myFuncs));
1867 arbTBO = (OpenGl_ArbTBO* )(&(*myFuncs));
1868 arbIns = (OpenGl_ArbIns* )(&(*myFuncs));
1876 core32 = (OpenGl_GlCore32* )(&(*myFuncs));
1877 core32back = (OpenGl_GlCore32Back* )(&(*myFuncs));
1885 core33 = (OpenGl_GlCore33* )(&(*myFuncs));
1886 core33back = (OpenGl_GlCore33Back* )(&(*myFuncs));
1888 // initialize sampler object
1889 myTexSampler = new OpenGl_Sampler();
1890 myTexSampler->Init (*this);
1898 arbTboRGB32 = Standard_True; // in core since OpenGL 4.0
1906 core41 = (OpenGl_GlCore41* )(&(*myFuncs));
1907 core41back = (OpenGl_GlCore41Back* )(&(*myFuncs));
1915 core42 = (OpenGl_GlCore42* )(&(*myFuncs));
1916 core42back = (OpenGl_GlCore42Back* )(&(*myFuncs));
1924 core43 = (OpenGl_GlCore43* )(&(*myFuncs));
1925 core43back = (OpenGl_GlCore43Back* )(&(*myFuncs));
1933 core44 = (OpenGl_GlCore44* )(&(*myFuncs));
1934 core44back = (OpenGl_GlCore44Back* )(&(*myFuncs));
1938 // =======================================================================
1939 // function : MemoryInfo
1941 // =======================================================================
1942 Standard_Size OpenGl_Context::AvailableMemory() const
1944 #if !defined(GL_ES_VERSION_2_0)
1947 // this is actually information for VBO pool
1948 // however because pools are mostly shared
1949 // it can be used for total GPU memory estimations
1952 glGetIntegerv (GL_VBO_FREE_MEMORY_ATI, aMemInfo);
1953 // returned value is in KiB, however this maybe changed in future
1954 return Standard_Size(aMemInfo[0]) * 1024;
1958 // current available dedicated video memory (in KiB), currently unused GPU memory
1960 glGetIntegerv (GL_GPU_MEMORY_INFO_CURRENT_AVAILABLE_VIDMEM_NVX, &aMemInfo);
1961 return Standard_Size(aMemInfo) * 1024;
1967 // =======================================================================
1968 // function : MemoryInfo
1970 // =======================================================================
1971 TCollection_AsciiString OpenGl_Context::MemoryInfo() const
1973 TCollection_AsciiString anInfo;
1974 #if !defined(GL_ES_VERSION_2_0)
1978 memset (aValues, 0, sizeof(aValues));
1979 glGetIntegerv (GL_VBO_FREE_MEMORY_ATI, aValues);
1981 // total memory free in the pool
1982 anInfo += TCollection_AsciiString (" GPU free memory: ") + (aValues[0] / 1024) + " MiB\n";
1984 // largest available free block in the pool
1985 anInfo += TCollection_AsciiString (" Largest free block: ") + (aValues[1] / 1024) + " MiB\n";
1986 if (aValues[2] != aValues[0])
1988 // total auxiliary memory free
1989 anInfo += TCollection_AsciiString (" Free memory: ") + (aValues[2] / 1024) + " MiB\n";
1994 //current available dedicated video memory (in KiB), currently unused GPU memory
1996 glGetIntegerv (GL_GPU_MEMORY_INFO_CURRENT_AVAILABLE_VIDMEM_NVX, &aValue);
1997 anInfo += TCollection_AsciiString (" GPU free memory: ") + (aValue / 1024) + " MiB\n";
1999 // dedicated video memory, total size (in KiB) of the GPU memory
2000 GLint aDedicated = 0;
2001 glGetIntegerv (GL_GPU_MEMORY_INFO_DEDICATED_VIDMEM_NVX, &aDedicated);
2002 anInfo += TCollection_AsciiString (" GPU memory: ") + (aDedicated / 1024) + " MiB\n";
2004 // total available memory, total size (in KiB) of the memory available for allocations
2005 glGetIntegerv (GL_GPU_MEMORY_INFO_TOTAL_AVAILABLE_MEMORY_NVX, &aValue);
2006 if (aValue != aDedicated)
2008 // different only for special configurations
2009 anInfo += TCollection_AsciiString (" Total memory: ") + (aValue / 1024) + " MiB\n";
2017 // =======================================================================
2018 // function : GetResource
2020 // =======================================================================
2021 const Handle(OpenGl_Resource)& OpenGl_Context::GetResource (const TCollection_AsciiString& theKey) const
2023 return mySharedResources->IsBound (theKey) ? mySharedResources->Find (theKey) : NULL_GL_RESOURCE;
2026 // =======================================================================
2027 // function : ShareResource
2029 // =======================================================================
2030 Standard_Boolean OpenGl_Context::ShareResource (const TCollection_AsciiString& theKey,
2031 const Handle(OpenGl_Resource)& theResource)
2033 if (theKey.IsEmpty() || theResource.IsNull())
2035 return Standard_False;
2037 return mySharedResources->Bind (theKey, theResource);
2040 // =======================================================================
2041 // function : ReleaseResource
2043 // =======================================================================
2044 void OpenGl_Context::ReleaseResource (const TCollection_AsciiString& theKey,
2045 const Standard_Boolean theToDelay)
2047 if (!mySharedResources->IsBound (theKey))
2051 const Handle(OpenGl_Resource)& aRes = mySharedResources->Find (theKey);
2052 if (aRes->GetRefCount() > 1)
2059 myDelayed->Bind (theKey, 1);
2063 aRes->Release (this);
2064 mySharedResources->UnBind (theKey);
2068 // =======================================================================
2069 // function : DelayedRelease
2071 // =======================================================================
2072 void OpenGl_Context::DelayedRelease (Handle(OpenGl_Resource)& theResource)
2074 myUnusedResources->Prepend (theResource);
2075 theResource.Nullify();
2078 // =======================================================================
2079 // function : ReleaseDelayed
2081 // =======================================================================
2082 void OpenGl_Context::ReleaseDelayed()
2084 // release queued elements
2085 while (!myUnusedResources->IsEmpty())
2087 myUnusedResources->First()->Release (this);
2088 myUnusedResources->RemoveFirst();
2091 // release delayed shared resources
2092 NCollection_Vector<TCollection_AsciiString> aDeadList;
2093 for (NCollection_DataMap<TCollection_AsciiString, Standard_Integer>::Iterator anIter (*myDelayed);
2094 anIter.More(); anIter.Next())
2096 if (++anIter.ChangeValue() <= 2)
2098 continue; // postpone release one more frame to ensure noone use it periodically
2101 const TCollection_AsciiString& aKey = anIter.Key();
2102 if (!mySharedResources->IsBound (aKey))
2104 // mixed unshared strategy delayed/undelayed was used!
2105 aDeadList.Append (aKey);
2109 Handle(OpenGl_Resource)& aRes = mySharedResources->ChangeFind (aKey);
2110 if (aRes->GetRefCount() > 1)
2112 // should be only 1 instance in mySharedResources
2113 // if not - resource was reused again
2114 aDeadList.Append (aKey);
2118 // release resource if no one requiested it more than 2 redraw calls
2119 aRes->Release (this);
2120 mySharedResources->UnBind (aKey);
2121 aDeadList.Append (aKey);
2124 for (Standard_Integer anIter = 0; anIter < aDeadList.Length(); ++anIter)
2126 myDelayed->UnBind (aDeadList.Value (anIter));
2130 // =======================================================================
2131 // function : BindProgram
2133 // =======================================================================
2134 Standard_Boolean OpenGl_Context::BindProgram (const Handle(OpenGl_ShaderProgram)& theProgram)
2136 if (core20fwd == NULL)
2138 return Standard_False;
2141 if (theProgram.IsNull()
2142 || !theProgram->IsValid())
2144 if (!myActiveProgram.IsNull())
2146 core20fwd->glUseProgram (OpenGl_ShaderProgram::NO_PROGRAM);
2147 myActiveProgram.Nullify();
2149 return Standard_False;
2152 myActiveProgram = theProgram;
2153 core20fwd->glUseProgram (theProgram->ProgramId());
2154 return Standard_True;
2157 // =======================================================================
2158 // function : SetColor4fv
2160 // =======================================================================
2161 void OpenGl_Context::SetColor4fv (const OpenGl_Vec4& theColor)
2163 if (!myActiveProgram.IsNull())
2165 myActiveProgram->SetUniform (this, myActiveProgram->GetStateLocation (OpenGl_OCCT_COLOR), theColor);
2167 #if !defined(GL_ES_VERSION_2_0)
2168 else if (core11 != NULL)
2170 core11->glColor4fv (theColor.GetData());
2175 // =======================================================================
2176 // function : SetPointSize
2178 // =======================================================================
2179 void OpenGl_Context::SetPointSize (const Standard_ShortReal theSize)
2181 if (!myActiveProgram.IsNull())
2183 myActiveProgram->SetUniform (this, myActiveProgram->GetStateLocation (OpenGl_OCCT_POINT_SIZE), theSize);
2184 #if !defined(GL_ES_VERSION_2_0)
2185 //myContext->core11fwd->glEnable (GL_VERTEX_PROGRAM_POINT_SIZE);
2188 #if !defined(GL_ES_VERSION_2_0)
2191 core11fwd->glPointSize (theSize);
2192 if (core20fwd != NULL)
2194 //myContext->core11fwd->glDisable (GL_VERTEX_PROGRAM_POINT_SIZE);
2200 // =======================================================================
2201 // function : SetGlNormalizeEnabled
2203 // =======================================================================
2204 Standard_Boolean OpenGl_Context::SetGlNormalizeEnabled (Standard_Boolean isEnabled)
2206 if (isEnabled == myIsGlNormalizeEnabled)
2208 return myIsGlNormalizeEnabled;
2211 Standard_Boolean anOldGlNormalize = myIsGlNormalizeEnabled;
2213 myIsGlNormalizeEnabled = isEnabled;
2215 #if !defined(GL_ES_VERSION_2_0)
2218 glEnable (GL_NORMALIZE);
2222 glDisable (GL_NORMALIZE);
2226 return anOldGlNormalize;