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 : MaxDegreeOfAnisotropy
205 // =======================================================================
206 Standard_Integer OpenGl_Context::MaxDegreeOfAnisotropy() const
211 // =======================================================================
212 // function : MaxTextureSize
214 // =======================================================================
215 Standard_Integer OpenGl_Context::MaxTextureSize() const
220 // =======================================================================
221 // function : MaxClipPlanes
223 // =======================================================================
224 Standard_Integer OpenGl_Context::MaxClipPlanes() const
226 return myMaxClipPlanes;
229 // =======================================================================
230 // function : SetDrawBufferLeft
232 // =======================================================================
233 void OpenGl_Context::SetDrawBufferLeft()
235 #if !defined(GL_ES_VERSION_2_0)
236 switch (myDrawBuffer)
240 glDrawBuffer (GL_BACK_LEFT);
241 myDrawBuffer = GL_BACK_LEFT;
244 case GL_FRONT_RIGHT :
246 glDrawBuffer (GL_FRONT_LEFT);
247 myDrawBuffer = GL_FRONT_LEFT;
250 case GL_FRONT_AND_BACK :
252 glDrawBuffer (GL_LEFT);
253 myDrawBuffer = GL_LEFT;
259 // =======================================================================
260 // function : SetDrawBufferRight
262 // =======================================================================
263 void OpenGl_Context::SetDrawBufferRight()
265 #if !defined(GL_ES_VERSION_2_0)
266 switch (myDrawBuffer)
270 glDrawBuffer (GL_BACK_RIGHT);
271 myDrawBuffer = GL_BACK_RIGHT;
276 glDrawBuffer (GL_FRONT_RIGHT);
277 myDrawBuffer = GL_FRONT_RIGHT;
280 case GL_FRONT_AND_BACK :
282 glDrawBuffer (GL_RIGHT);
283 myDrawBuffer = GL_RIGHT;
289 // =======================================================================
290 // function : SetDrawBufferMono
292 // =======================================================================
293 void OpenGl_Context::SetDrawBufferMono()
295 #if !defined(GL_ES_VERSION_2_0)
296 switch (myDrawBuffer)
300 glDrawBuffer (GL_BACK);
301 myDrawBuffer = GL_BACK;
305 case GL_FRONT_RIGHT :
306 glDrawBuffer (GL_FRONT);
307 myDrawBuffer = GL_FRONT;
312 glDrawBuffer (GL_FRONT_AND_BACK);
313 myDrawBuffer = GL_FRONT_AND_BACK;
319 // =======================================================================
320 // function : FetchState
322 // =======================================================================
323 void OpenGl_Context::FetchState()
325 #if !defined(GL_ES_VERSION_2_0)
326 // cache feedback mode state
327 glGetIntegerv (GL_RENDER_MODE, &myRenderMode);
329 // cache draw buffer state
330 glGetIntegerv (GL_DRAW_BUFFER, &myDrawBuffer);
334 // =======================================================================
337 // =======================================================================
338 void OpenGl_Context::Share (const Handle(OpenGl_Context)& theShareCtx)
340 if (!theShareCtx.IsNull())
342 mySharedResources = theShareCtx->mySharedResources;
343 myDelayed = theShareCtx->myDelayed;
344 myUnusedResources = theShareCtx->myUnusedResources;
345 myShaderManager = theShareCtx->myShaderManager;
349 #if !defined(__APPLE__) || defined(MACOSX_USE_GLX)
351 // =======================================================================
352 // function : IsCurrent
354 // =======================================================================
355 Standard_Boolean OpenGl_Context::IsCurrent() const
357 #if defined(HAVE_EGL)
358 if ((EGLDisplay )myDisplay == EGL_NO_DISPLAY
359 || (EGLSurface )myWindow == EGL_NO_SURFACE
360 || (EGLContext )myGContext == EGL_NO_CONTEXT)
362 return Standard_False;
365 return (((EGLDisplay )myDisplay == eglGetCurrentDisplay())
366 && ((EGLContext )myGContext == eglGetCurrentContext())
367 && ((EGLSurface )myWindow == eglGetCurrentSurface (EGL_DRAW)));
368 #elif defined(_WIN32)
369 if (myWindowDC == NULL || myGContext == NULL)
371 return Standard_False;
373 return (( (HDC )myWindowDC == wglGetCurrentDC())
374 && ((HGLRC )myGContext == wglGetCurrentContext()));
376 if (myDisplay == NULL || myWindow == 0 || myGContext == 0)
378 return Standard_False;
381 return ( ((Display* )myDisplay == glXGetCurrentDisplay())
382 && ((GLXContext )myGContext == glXGetCurrentContext())
383 && ((GLXDrawable )myWindow == glXGetCurrentDrawable()));
387 // =======================================================================
388 // function : MakeCurrent
390 // =======================================================================
391 Standard_Boolean OpenGl_Context::MakeCurrent()
393 #if defined(HAVE_EGL)
394 if ((EGLDisplay )myDisplay == EGL_NO_DISPLAY
395 || (EGLSurface )myWindow == EGL_NO_SURFACE
396 || (EGLContext )myGContext == EGL_NO_CONTEXT)
398 Standard_ProgramError_Raise_if (myIsInitialized, "OpenGl_Context::Init() should be called before!");
399 return Standard_False;
402 if (eglMakeCurrent ((EGLDisplay )myDisplay, (EGLSurface )myWindow, (EGLSurface )myWindow, (EGLContext )myGContext) != EGL_TRUE)
404 // if there is no current context it might be impossible to use glGetError() correctly
405 PushMessage (GL_DEBUG_SOURCE_WINDOW_SYSTEM_ARB, GL_DEBUG_TYPE_ERROR_ARB, 0, GL_DEBUG_SEVERITY_HIGH_ARB,
406 "eglMakeCurrent() has failed!");
407 myIsInitialized = Standard_False;
408 return Standard_False;
410 #elif defined(_WIN32)
411 if (myWindowDC == NULL || myGContext == NULL)
413 Standard_ProgramError_Raise_if (myIsInitialized, "OpenGl_Context::Init() should be called before!");
414 return Standard_False;
417 // technically it should be safe to activate already bound GL context
418 // however some drivers (Intel etc.) may FAIL doing this for unknown reason
421 myShaderManager->SetContext (this);
422 return Standard_True;
424 else if (wglMakeCurrent ((HDC )myWindowDC, (HGLRC )myGContext) != TRUE)
426 // notice that glGetError() couldn't be used here!
427 wchar_t* aMsgBuff = NULL;
428 DWORD anErrorCode = GetLastError();
429 FormatMessageW (FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
430 NULL, anErrorCode, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (wchar_t* )&aMsgBuff, 0, NULL);
431 TCollection_ExtendedString aMsg ("wglMakeCurrent() has failed. ");
432 if (aMsgBuff != NULL)
434 aMsg += (Standard_ExtString )aMsgBuff;
435 LocalFree (aMsgBuff);
437 PushMessage (GL_DEBUG_SOURCE_WINDOW_SYSTEM_ARB, GL_DEBUG_TYPE_ERROR_ARB, (unsigned int )anErrorCode, GL_DEBUG_SEVERITY_HIGH_ARB, aMsg);
438 myIsInitialized = Standard_False;
439 return Standard_False;
442 if (myDisplay == NULL || myWindow == 0 || myGContext == 0)
444 Standard_ProgramError_Raise_if (myIsInitialized, "OpenGl_Context::Init() should be called before!");
445 return Standard_False;
448 if (!glXMakeCurrent ((Display* )myDisplay, (GLXDrawable )myWindow, (GLXContext )myGContext))
450 // if there is no current context it might be impossible to use glGetError() correctly
451 PushMessage (GL_DEBUG_SOURCE_WINDOW_SYSTEM_ARB, GL_DEBUG_TYPE_ERROR_ARB, 0, GL_DEBUG_SEVERITY_HIGH_ARB,
452 "glXMakeCurrent() has failed!");
453 myIsInitialized = Standard_False;
454 return Standard_False;
457 myShaderManager->SetContext (this);
458 return Standard_True;
461 // =======================================================================
462 // function : SwapBuffers
464 // =======================================================================
465 void OpenGl_Context::SwapBuffers()
467 #if defined(HAVE_EGL)
468 if ((EGLSurface )myWindow != EGL_NO_SURFACE)
470 eglSwapBuffers ((EGLDisplay )myDisplay, (EGLSurface )myWindow);
472 #elif defined(_WIN32)
473 if ((HDC )myWindowDC != NULL)
475 ::SwapBuffers ((HDC )myWindowDC);
479 if ((Display* )myDisplay != NULL)
481 glXSwapBuffers ((Display* )myDisplay, (GLXDrawable )myWindow);
488 // =======================================================================
489 // function : findProc
491 // =======================================================================
492 void* OpenGl_Context::findProc (const char* theFuncName)
494 #if defined(HAVE_EGL)
495 return (void* )eglGetProcAddress (theFuncName);
496 #elif defined(_WIN32)
497 return wglGetProcAddress (theFuncName);
498 #elif defined(__APPLE__) && !defined(MACOSX_USE_GLX)
499 return (myGlLibHandle != NULL) ? dlsym (myGlLibHandle, theFuncName) : NULL;
501 return (void* )glXGetProcAddress ((const GLubyte* )theFuncName);
505 // =======================================================================
506 // function : CheckExtension
508 // =======================================================================
509 Standard_Boolean OpenGl_Context::CheckExtension (const char* theExtName) const
511 if (theExtName == NULL)
514 std::cerr << "CheckExtension called with NULL string!\n";
516 return Standard_False;
519 // available since OpenGL 3.0
520 // and the ONLY way to check extensions with OpenGL 3.1+ core profile
521 /**if (IsGlGreaterEqual (3, 0))
524 glGetIntegerv (GL_NUM_EXTENSIONS, &anExtNb);
525 for (GLint anIter = 0; anIter < anExtNb; ++anIter)
527 const char* anExtension = (const char* )core30->glGetStringi (GL_EXTENSIONS, (GLuint )anIter);
528 if (anExtension[anExtNameLen] == '\0' &&
529 strncmp (anExtension, theExtName, anExtNameLen) == 0)
531 return Standard_True;
534 return Standard_False;
537 // use old way with huge string for all extensions
538 const char* anExtString = (const char* )glGetString (GL_EXTENSIONS);
539 if (anExtString == NULL)
541 Messenger()->Send ("TKOpenGL: glGetString (GL_EXTENSIONS) has returned NULL! No GL context?", Message_Warning);
542 return Standard_False;
544 return CheckExtension (anExtString, theExtName);
547 // =======================================================================
548 // function : CheckExtension
550 // =======================================================================
551 Standard_Boolean OpenGl_Context::CheckExtension (const char* theExtString,
552 const char* theExtName)
554 if (theExtString == NULL)
556 return Standard_False;
559 // Search for theExtName in the extensions string.
560 // Use of strstr() is not sufficient because extension names can be prefixes of other extension names.
561 char* aPtrIter = (char* )theExtString;
562 const char* aPtrEnd = aPtrIter + strlen (theExtString);
563 const size_t anExtNameLen = strlen (theExtName);
564 while (aPtrIter < aPtrEnd)
566 const size_t n = strcspn (aPtrIter, " ");
567 if ((n == anExtNameLen) && (strncmp (aPtrIter, theExtName, anExtNameLen) == 0))
569 return Standard_True;
573 return Standard_False;
576 #if !defined(__APPLE__) || defined(MACOSX_USE_GLX)
578 // =======================================================================
581 // =======================================================================
582 Standard_Boolean OpenGl_Context::Init()
586 return Standard_True;
589 #if defined(HAVE_EGL)
590 myDisplay = (Aspect_Display )eglGetCurrentDisplay();
591 myGContext = (Aspect_RenderingContext )eglGetCurrentContext();
592 myWindow = (Aspect_Drawable )eglGetCurrentSurface(EGL_DRAW);
593 #elif defined(_WIN32)
594 myWindowDC = (Aspect_Handle )wglGetCurrentDC();
595 myGContext = (Aspect_RenderingContext )wglGetCurrentContext();
597 myDisplay = (Aspect_Display )glXGetCurrentDisplay();
598 myGContext = (Aspect_RenderingContext )glXGetCurrentContext();
599 myWindow = (Aspect_Drawable )glXGetCurrentDrawable();
601 if (myGContext == NULL)
603 return Standard_False;
607 myIsInitialized = Standard_True;
608 return Standard_True;
613 // =======================================================================
616 // =======================================================================
617 #if defined(HAVE_EGL)
618 Standard_Boolean OpenGl_Context::Init (const Aspect_Drawable theEglSurface,
619 const Aspect_Display theEglDisplay,
620 const Aspect_RenderingContext theEglContext)
621 #elif defined(_WIN32)
622 Standard_Boolean OpenGl_Context::Init (const Aspect_Handle theWindow,
623 const Aspect_Handle theWindowDC,
624 const Aspect_RenderingContext theGContext)
625 #elif defined(__APPLE__) && !defined(MACOSX_USE_GLX)
626 Standard_Boolean OpenGl_Context::Init (const void* theGContext)
628 Standard_Boolean OpenGl_Context::Init (const Aspect_Drawable theWindow,
629 const Aspect_Display theDisplay,
630 const Aspect_RenderingContext theGContext)
633 Standard_ProgramError_Raise_if (myIsInitialized, "OpenGl_Context::Init() should be called only once!");
634 #if defined(HAVE_EGL)
635 myWindow = theEglSurface;
636 myGContext = theEglContext;
637 myDisplay = theEglDisplay;
638 #elif defined(_WIN32)
639 myWindow = theWindow;
640 myGContext = theGContext;
641 myWindowDC = theWindowDC;
642 #elif defined(__APPLE__) && !defined(MACOSX_USE_GLX)
643 myGContext = (void* )theGContext;
645 myWindow = theWindow;
646 myGContext = theGContext;
647 myDisplay = theDisplay;
649 if (myGContext == NULL || !MakeCurrent())
651 return Standard_False;
655 myIsInitialized = Standard_True;
656 return Standard_True;
659 // =======================================================================
660 // function : ResetErrors
662 // =======================================================================
663 void OpenGl_Context::ResetErrors()
665 while (glGetError() != GL_NO_ERROR)
671 // =======================================================================
672 // function : readGlVersion
674 // =======================================================================
675 void OpenGl_Context::readGlVersion()
681 #ifdef GL_MAJOR_VERSION
682 // available since OpenGL 3.0 and OpenGL 3.0 ES
683 GLint aMajor = 0, aMinor = 0;
684 glGetIntegerv (GL_MAJOR_VERSION, &aMajor);
685 glGetIntegerv (GL_MINOR_VERSION, &aMinor);
686 // glGetError() sometimes does not report an error here even if
687 // GL does not know GL_MAJOR_VERSION and GL_MINOR_VERSION constants.
688 // This happens on some renderers like e.g. Cygwin MESA.
689 // Thus checking additionally if GL has put anything to
690 // the output variables.
691 if (glGetError() == GL_NO_ERROR && aMajor != 0 && aMinor != 0)
693 myGlVerMajor = aMajor;
694 myGlVerMinor = aMinor;
700 // Read version string.
701 // Notice that only first two numbers split by point '2.1 XXXXX' are significant.
702 // Following trash (after space) is vendor-specific.
703 // New drivers also returns micro version of GL like '3.3.0' which has no meaning
704 // and should be considered as vendor-specific too.
705 const char* aVerStr = (const char* )glGetString (GL_VERSION);
706 if (aVerStr == NULL || *aVerStr == '\0')
708 // invalid GL context
712 //#if defined(GL_ES_VERSION_2_0)
713 // skip "OpenGL ES-** " section
714 for (; *aVerStr != '\0'; ++aVerStr)
716 if (*aVerStr >= '0' && *aVerStr <= '9')
723 // parse string for major number
727 while (aVerStr[aMajIter] >= '0' && aVerStr[aMajIter] <= '9')
731 if (aMajIter == 0 || aMajIter >= sizeof(aMajorStr))
735 memcpy (aMajorStr, aVerStr, aMajIter);
736 aMajorStr[aMajIter] = '\0';
738 // parse string for minor number
739 aVerStr += aMajIter + 1;
741 while (aVerStr[aMinIter] >= '0' && aVerStr[aMinIter] <= '9')
745 if (aMinIter == 0 || aMinIter >= sizeof(aMinorStr))
749 memcpy (aMinorStr, aVerStr, aMinIter);
750 aMinorStr[aMinIter] = '\0';
753 myGlVerMajor = atoi (aMajorStr);
754 myGlVerMinor = atoi (aMinorStr);
756 if (myGlVerMajor <= 0)
763 static Standard_CString THE_DBGMSG_UNKNOWN = "UNKNOWN";
764 static Standard_CString THE_DBGMSG_SOURCES[] =
766 ".OpenGL", // GL_DEBUG_SOURCE_API_ARB
767 ".WinSystem", // GL_DEBUG_SOURCE_WINDOW_SYSTEM_ARB
768 ".GLSL", // GL_DEBUG_SOURCE_SHADER_COMPILER_ARB
769 ".3rdParty", // GL_DEBUG_SOURCE_THIRD_PARTY_ARB
770 "", // GL_DEBUG_SOURCE_APPLICATION_ARB
771 ".Other" // GL_DEBUG_SOURCE_OTHER_ARB
774 static Standard_CString THE_DBGMSG_TYPES[] =
776 "Error", // GL_DEBUG_TYPE_ERROR_ARB
777 "Deprecated", // GL_DEBUG_TYPE_DEPRECATED_BEHAVIOR_ARB
778 "Undef. behavior", // GL_DEBUG_TYPE_UNDEFINED_BEHAVIOR_ARB
779 "Portability", // GL_DEBUG_TYPE_PORTABILITY_ARB
780 "Performance", // GL_DEBUG_TYPE_PERFORMANCE_ARB
781 "Other" // GL_DEBUG_TYPE_OTHER_ARB
784 static Standard_CString THE_DBGMSG_SEV_HIGH = "High"; // GL_DEBUG_SEVERITY_HIGH_ARB
785 static Standard_CString THE_DBGMSG_SEV_MEDIUM = "Medium"; // GL_DEBUG_SEVERITY_MEDIUM_ARB
786 static Standard_CString THE_DBGMSG_SEV_LOW = "Low"; // GL_DEBUG_SEVERITY_LOW_ARB
788 #if !defined(GL_ES_VERSION_2_0)
789 //! Callback for GL_ARB_debug_output extension
790 static void APIENTRY debugCallbackWrap(unsigned int theSource,
791 unsigned int theType,
793 unsigned int theSeverity,
795 const char* theMessage,
796 const void* theUserParam)
798 OpenGl_Context* aCtx = (OpenGl_Context* )theUserParam;
799 aCtx->PushMessage (theSource, theType, theId, theSeverity, theMessage);
803 // =======================================================================
804 // function : PushMessage
806 // =======================================================================
807 void OpenGl_Context::PushMessage (const unsigned int theSource,
808 const unsigned int theType,
809 const unsigned int theId,
810 const unsigned int theSeverity,
811 const TCollection_ExtendedString& theMessage)
813 //OpenGl_Context* aCtx = (OpenGl_Context* )theUserParam;
814 Standard_CString& aSrc = (theSource >= GL_DEBUG_SOURCE_API_ARB
815 && theSource <= GL_DEBUG_SOURCE_OTHER_ARB)
816 ? THE_DBGMSG_SOURCES[theSource - GL_DEBUG_SOURCE_API_ARB]
817 : THE_DBGMSG_UNKNOWN;
818 Standard_CString& aType = (theType >= GL_DEBUG_TYPE_ERROR_ARB
819 && theType <= GL_DEBUG_TYPE_OTHER_ARB)
820 ? THE_DBGMSG_TYPES[theType - GL_DEBUG_TYPE_ERROR_ARB]
821 : THE_DBGMSG_UNKNOWN;
822 Standard_CString& aSev = theSeverity == GL_DEBUG_SEVERITY_HIGH_ARB
823 ? THE_DBGMSG_SEV_HIGH
824 : (theSeverity == GL_DEBUG_SEVERITY_MEDIUM_ARB
825 ? THE_DBGMSG_SEV_MEDIUM
826 : THE_DBGMSG_SEV_LOW);
827 Message_Gravity aGrav = theSeverity == GL_DEBUG_SEVERITY_HIGH_ARB
829 : (theSeverity == GL_DEBUG_SEVERITY_MEDIUM_ARB
833 TCollection_ExtendedString aMsg;
834 aMsg += "TKOpenGl"; aMsg += aSrc;
835 aMsg += " | Type: "; aMsg += aType;
836 aMsg += " | ID: "; aMsg += (Standard_Integer )theId;
837 aMsg += " | Severity: "; aMsg += aSev;
838 aMsg += " | Message:\n ";
840 Messenger()->Send (aMsg, aGrav);
843 // =======================================================================
846 // =======================================================================
847 void OpenGl_Context::init()
852 core11 = (OpenGl_GlCore11* )(&(*myFuncs));
853 core11fwd = (OpenGl_GlCore11Fwd* )(&(*myFuncs));
871 arbTboRGB32 = Standard_False;
877 #if defined(GL_ES_VERSION_2_0)
879 hasTexRGBA8 = IsGlGreaterEqual (3, 0)
880 || CheckExtension ("GL_OES_rgb8_rgba8");
881 arbNPTW = IsGlGreaterEqual (3, 0)
882 || CheckExtension ("GL_OES_texture_npot");
883 arbTexRG = IsGlGreaterEqual (3, 0)
884 || CheckExtension ("GL_EXT_texture_rg");
885 extBgra = CheckExtension ("GL_EXT_texture_format_BGRA8888");
886 extAnis = CheckExtension ("GL_EXT_texture_filter_anisotropic");
887 extPDS = CheckExtension ("GL_OES_packed_depth_stencil");
889 core11fwd = (OpenGl_GlCore11Fwd* )(&(*myFuncs));
890 if (IsGlGreaterEqual (2, 0))
892 // enable compatible functions
893 core20 = (OpenGl_GlCore20* )(&(*myFuncs));
894 core20fwd = (OpenGl_GlCore20Fwd* )(&(*myFuncs));
895 core15fwd = (OpenGl_GlCore15Fwd* )(&(*myFuncs));
896 arbFBO = (OpenGl_ArbFBO* )(&(*myFuncs));
899 hasHighp = CheckExtension ("OES_fragment_precision_high");
900 GLint aRange[2] = {0, 0};
901 GLint aPrec [2] = {0, 0};
902 ::glGetShaderPrecisionFormat (GL_FRAGMENT_SHADER, GL_HIGH_FLOAT, aRange, aPrec);
905 hasHighp = Standard_True;
909 myTexClamp = IsGlGreaterEqual (1, 2) ? GL_CLAMP_TO_EDGE : GL_CLAMP;
911 hasTexRGBA8 = Standard_True;
912 arbNPTW = CheckExtension ("GL_ARB_texture_non_power_of_two");
913 extBgra = CheckExtension ("GL_EXT_bgra");
914 extAnis = CheckExtension ("GL_EXT_texture_filter_anisotropic");
915 extPDS = CheckExtension ("GL_EXT_packed_depth_stencil");
916 atiMem = CheckExtension ("GL_ATI_meminfo");
917 nvxMem = CheckExtension ("GL_NVX_gpu_memory_info");
919 GLint aStereo = GL_FALSE;
920 glGetIntegerv (GL_STEREO, &aStereo);
921 myIsStereoBuffers = aStereo == 1;
923 // get number of maximum clipping planes
924 glGetIntegerv (GL_MAX_CLIP_PLANES, &myMaxClipPlanes);
927 glGetIntegerv (GL_MAX_TEXTURE_SIZE, &myMaxTexDim);
931 glGetIntegerv (GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &myAnisoMax);
934 myClippingState.Init (myMaxClipPlanes);
936 #if !defined(GL_ES_VERSION_2_0)
954 //! Make record shorter to retrieve function pointer using variable with same name
955 #define FindProcShort(theFunc) FindProc(#theFunc, myFuncs->theFunc)
957 // retrieve platform-dependent extensions
958 #if defined(_WIN32) && !defined(HAVE_EGL)
959 if (FindProcShort (wglGetExtensionsStringARB))
961 const char* aWglExts = myFuncs->wglGetExtensionsStringARB (wglGetCurrentDC());
962 if (CheckExtension (aWglExts, "WGL_EXT_swap_control"))
964 FindProcShort (wglSwapIntervalEXT);
966 if (CheckExtension (aWglExts, "WGL_ARB_pixel_format"))
968 FindProcShort (wglChoosePixelFormatARB);
970 if (CheckExtension (aWglExts, "WGL_ARB_create_context_profile"))
972 FindProcShort (wglCreateContextAttribsARB);
974 if (CheckExtension (aWglExts, "WGL_NV_DX_interop"))
976 FindProcShort (wglDXSetResourceShareHandleNV);
977 FindProcShort (wglDXOpenDeviceNV);
978 FindProcShort (wglDXCloseDeviceNV);
979 FindProcShort (wglDXRegisterObjectNV);
980 FindProcShort (wglDXUnregisterObjectNV);
981 FindProcShort (wglDXObjectAccessNV);
982 FindProcShort (wglDXLockObjectsNV);
983 FindProcShort (wglDXUnlockObjectsNV);
988 // initialize debug context extension
989 if (CheckExtension ("GL_ARB_debug_output"))
992 if (FindProcShort (glDebugMessageControlARB)
993 && FindProcShort (glDebugMessageInsertARB)
994 && FindProcShort (glDebugMessageCallbackARB)
995 && FindProcShort (glGetDebugMessageLogARB))
997 arbDbg = (OpenGl_ArbDbg* )(&(*myFuncs));
1000 && caps->contextDebug)
1002 // setup default callback
1003 arbDbg->glDebugMessageCallbackARB (debugCallbackWrap, this);
1005 glEnable (GL_DEBUG_OUTPUT_SYNCHRONOUS_ARB);
1010 // load OpenGL 1.2 new functions
1011 has12 = IsGlGreaterEqual (1, 2)
1012 && FindProcShort (glBlendColor)
1013 && FindProcShort (glBlendEquation)
1014 && FindProcShort (glDrawRangeElements)
1015 && FindProcShort (glTexImage3D)
1016 && FindProcShort (glTexSubImage3D)
1017 && FindProcShort (glCopyTexSubImage3D);
1019 // load OpenGL 1.3 new functions
1020 has13 = IsGlGreaterEqual (1, 3)
1021 && FindProcShort (glActiveTexture)
1022 && FindProcShort (glSampleCoverage)
1023 && FindProcShort (glCompressedTexImage3D)
1024 && FindProcShort (glCompressedTexImage2D)
1025 && FindProcShort (glCompressedTexImage1D)
1026 && FindProcShort (glCompressedTexSubImage3D)
1027 && FindProcShort (glCompressedTexSubImage2D)
1028 && FindProcShort (glCompressedTexSubImage1D)
1029 && FindProcShort (glGetCompressedTexImage)
1030 && FindProcShort (glClientActiveTexture)
1031 && FindProcShort (glMultiTexCoord1d)
1032 && FindProcShort (glMultiTexCoord1dv)
1033 && FindProcShort (glMultiTexCoord1f)
1034 && FindProcShort (glMultiTexCoord1fv)
1035 && FindProcShort (glMultiTexCoord1i)
1036 && FindProcShort (glMultiTexCoord1iv)
1037 && FindProcShort (glMultiTexCoord1s)
1038 && FindProcShort (glMultiTexCoord1sv)
1039 && FindProcShort (glMultiTexCoord2d)
1040 && FindProcShort (glMultiTexCoord2dv)
1041 && FindProcShort (glMultiTexCoord2f)
1042 && FindProcShort (glMultiTexCoord2fv)
1043 && FindProcShort (glMultiTexCoord2i)
1044 && FindProcShort (glMultiTexCoord2iv)
1045 && FindProcShort (glMultiTexCoord2s)
1046 && FindProcShort (glMultiTexCoord2sv)
1047 && FindProcShort (glMultiTexCoord3d)
1048 && FindProcShort (glMultiTexCoord3dv)
1049 && FindProcShort (glMultiTexCoord3f)
1050 && FindProcShort (glMultiTexCoord3fv)
1051 && FindProcShort (glMultiTexCoord3i)
1052 && FindProcShort (glMultiTexCoord3iv)
1053 && FindProcShort (glMultiTexCoord3s)
1054 && FindProcShort (glMultiTexCoord3sv)
1055 && FindProcShort (glMultiTexCoord4d)
1056 && FindProcShort (glMultiTexCoord4dv)
1057 && FindProcShort (glMultiTexCoord4f)
1058 && FindProcShort (glMultiTexCoord4fv)
1059 && FindProcShort (glMultiTexCoord4i)
1060 && FindProcShort (glMultiTexCoord4iv)
1061 && FindProcShort (glMultiTexCoord4s)
1062 && FindProcShort (glMultiTexCoord4sv)
1063 && FindProcShort (glLoadTransposeMatrixf)
1064 && FindProcShort (glLoadTransposeMatrixd)
1065 && FindProcShort (glMultTransposeMatrixf)
1066 && FindProcShort (glMultTransposeMatrixd);
1068 // load OpenGL 1.4 new functions
1069 has14 = IsGlGreaterEqual (1, 4)
1070 && FindProcShort (glBlendFuncSeparate)
1071 && FindProcShort (glMultiDrawArrays)
1072 && FindProcShort (glMultiDrawElements)
1073 && FindProcShort (glPointParameterf)
1074 && FindProcShort (glPointParameterfv)
1075 && FindProcShort (glPointParameteri)
1076 && FindProcShort (glPointParameteriv);
1078 // load OpenGL 1.5 new functions
1079 has15 = IsGlGreaterEqual (1, 5)
1080 && FindProcShort (glGenQueries)
1081 && FindProcShort (glDeleteQueries)
1082 && FindProcShort (glIsQuery)
1083 && FindProcShort (glBeginQuery)
1084 && FindProcShort (glEndQuery)
1085 && FindProcShort (glGetQueryiv)
1086 && FindProcShort (glGetQueryObjectiv)
1087 && FindProcShort (glGetQueryObjectuiv)
1088 && FindProcShort (glBindBuffer)
1089 && FindProcShort (glDeleteBuffers)
1090 && FindProcShort (glGenBuffers)
1091 && FindProcShort (glIsBuffer)
1092 && FindProcShort (glBufferData)
1093 && FindProcShort (glBufferSubData)
1094 && FindProcShort (glGetBufferSubData)
1095 && FindProcShort (glMapBuffer)
1096 && FindProcShort (glUnmapBuffer)
1097 && FindProcShort (glGetBufferParameteriv)
1098 && FindProcShort (glGetBufferPointerv);
1100 // load OpenGL 2.0 new functions
1101 has20 = IsGlGreaterEqual (2, 0)
1102 && FindProcShort (glBlendEquationSeparate)
1103 && FindProcShort (glDrawBuffers)
1104 && FindProcShort (glStencilOpSeparate)
1105 && FindProcShort (glStencilFuncSeparate)
1106 && FindProcShort (glStencilMaskSeparate)
1107 && FindProcShort (glAttachShader)
1108 && FindProcShort (glBindAttribLocation)
1109 && FindProcShort (glCompileShader)
1110 && FindProcShort (glCreateProgram)
1111 && FindProcShort (glCreateShader)
1112 && FindProcShort (glDeleteProgram)
1113 && FindProcShort (glDeleteShader)
1114 && FindProcShort (glDetachShader)
1115 && FindProcShort (glDisableVertexAttribArray)
1116 && FindProcShort (glEnableVertexAttribArray)
1117 && FindProcShort (glGetActiveAttrib)
1118 && FindProcShort (glGetActiveUniform)
1119 && FindProcShort (glGetAttachedShaders)
1120 && FindProcShort (glGetAttribLocation)
1121 && FindProcShort (glGetProgramiv)
1122 && FindProcShort (glGetProgramInfoLog)
1123 && FindProcShort (glGetShaderiv)
1124 && FindProcShort (glGetShaderInfoLog)
1125 && FindProcShort (glGetShaderSource)
1126 && FindProcShort (glGetUniformLocation)
1127 && FindProcShort (glGetUniformfv)
1128 && FindProcShort (glGetUniformiv)
1129 && FindProcShort (glGetVertexAttribdv)
1130 && FindProcShort (glGetVertexAttribfv)
1131 && FindProcShort (glGetVertexAttribiv)
1132 && FindProcShort (glGetVertexAttribPointerv)
1133 && FindProcShort (glIsProgram)
1134 && FindProcShort (glIsShader)
1135 && FindProcShort (glLinkProgram)
1136 && FindProcShort (glShaderSource)
1137 && FindProcShort (glUseProgram)
1138 && FindProcShort (glUniform1f)
1139 && FindProcShort (glUniform2f)
1140 && FindProcShort (glUniform3f)
1141 && FindProcShort (glUniform4f)
1142 && FindProcShort (glUniform1i)
1143 && FindProcShort (glUniform2i)
1144 && FindProcShort (glUniform3i)
1145 && FindProcShort (glUniform4i)
1146 && FindProcShort (glUniform1fv)
1147 && FindProcShort (glUniform2fv)
1148 && FindProcShort (glUniform3fv)
1149 && FindProcShort (glUniform4fv)
1150 && FindProcShort (glUniform1iv)
1151 && FindProcShort (glUniform2iv)
1152 && FindProcShort (glUniform3iv)
1153 && FindProcShort (glUniform4iv)
1154 && FindProcShort (glUniformMatrix2fv)
1155 && FindProcShort (glUniformMatrix3fv)
1156 && FindProcShort (glUniformMatrix4fv)
1157 && FindProcShort (glValidateProgram)
1158 && FindProcShort (glVertexAttrib1d)
1159 && FindProcShort (glVertexAttrib1dv)
1160 && FindProcShort (glVertexAttrib1f)
1161 && FindProcShort (glVertexAttrib1fv)
1162 && FindProcShort (glVertexAttrib1s)
1163 && FindProcShort (glVertexAttrib1sv)
1164 && FindProcShort (glVertexAttrib2d)
1165 && FindProcShort (glVertexAttrib2dv)
1166 && FindProcShort (glVertexAttrib2f)
1167 && FindProcShort (glVertexAttrib2fv)
1168 && FindProcShort (glVertexAttrib2s)
1169 && FindProcShort (glVertexAttrib2sv)
1170 && FindProcShort (glVertexAttrib3d)
1171 && FindProcShort (glVertexAttrib3dv)
1172 && FindProcShort (glVertexAttrib3f)
1173 && FindProcShort (glVertexAttrib3fv)
1174 && FindProcShort (glVertexAttrib3s)
1175 && FindProcShort (glVertexAttrib3sv)
1176 && FindProcShort (glVertexAttrib4Nbv)
1177 && FindProcShort (glVertexAttrib4Niv)
1178 && FindProcShort (glVertexAttrib4Nsv)
1179 && FindProcShort (glVertexAttrib4Nub)
1180 && FindProcShort (glVertexAttrib4Nubv)
1181 && FindProcShort (glVertexAttrib4Nuiv)
1182 && FindProcShort (glVertexAttrib4Nusv)
1183 && FindProcShort (glVertexAttrib4bv)
1184 && FindProcShort (glVertexAttrib4d)
1185 && FindProcShort (glVertexAttrib4dv)
1186 && FindProcShort (glVertexAttrib4f)
1187 && FindProcShort (glVertexAttrib4fv)
1188 && FindProcShort (glVertexAttrib4iv)
1189 && FindProcShort (glVertexAttrib4s)
1190 && FindProcShort (glVertexAttrib4sv)
1191 && FindProcShort (glVertexAttrib4ubv)
1192 && FindProcShort (glVertexAttrib4uiv)
1193 && FindProcShort (glVertexAttrib4usv)
1194 && FindProcShort (glVertexAttribPointer);
1196 // load OpenGL 2.1 new functions
1197 has21 = IsGlGreaterEqual (2, 1)
1198 && FindProcShort (glUniformMatrix2x3fv)
1199 && FindProcShort (glUniformMatrix3x2fv)
1200 && FindProcShort (glUniformMatrix2x4fv)
1201 && FindProcShort (glUniformMatrix4x2fv)
1202 && FindProcShort (glUniformMatrix3x4fv)
1203 && FindProcShort (glUniformMatrix4x3fv);
1205 // load GL_ARB_framebuffer_object (added to OpenGL 3.0 core)
1206 const bool hasFBO = (IsGlGreaterEqual (3, 0) || CheckExtension ("GL_ARB_framebuffer_object"))
1207 && FindProcShort (glIsRenderbuffer)
1208 && FindProcShort (glBindRenderbuffer)
1209 && FindProcShort (glDeleteRenderbuffers)
1210 && FindProcShort (glGenRenderbuffers)
1211 && FindProcShort (glRenderbufferStorage)
1212 && FindProcShort (glGetRenderbufferParameteriv)
1213 && FindProcShort (glIsFramebuffer)
1214 && FindProcShort (glBindFramebuffer)
1215 && FindProcShort (glDeleteFramebuffers)
1216 && FindProcShort (glGenFramebuffers)
1217 && FindProcShort (glCheckFramebufferStatus)
1218 && FindProcShort (glFramebufferTexture1D)
1219 && FindProcShort (glFramebufferTexture2D)
1220 && FindProcShort (glFramebufferTexture3D)
1221 && FindProcShort (glFramebufferRenderbuffer)
1222 && FindProcShort (glGetFramebufferAttachmentParameteriv)
1223 && FindProcShort (glGenerateMipmap)
1224 && FindProcShort (glBlitFramebuffer)
1225 && FindProcShort (glRenderbufferStorageMultisample)
1226 && FindProcShort (glFramebufferTextureLayer);
1228 // load GL_ARB_vertex_array_object (added to OpenGL 3.0 core)
1229 const bool hasVAO = (IsGlGreaterEqual (3, 0) || CheckExtension ("GL_ARB_vertex_array_object"))
1230 && FindProcShort (glBindVertexArray)
1231 && FindProcShort (glDeleteVertexArrays)
1232 && FindProcShort (glGenVertexArrays)
1233 && FindProcShort (glIsVertexArray);
1235 // load GL_ARB_map_buffer_range (added to OpenGL 3.0 core)
1236 const bool hasMapBufferRange = (IsGlGreaterEqual (3, 0) || CheckExtension ("GL_ARB_map_buffer_range"))
1237 && FindProcShort (glMapBufferRange)
1238 && FindProcShort (glFlushMappedBufferRange);
1240 // load OpenGL 3.0 new functions
1241 has30 = IsGlGreaterEqual (3, 0)
1244 && hasMapBufferRange
1245 && FindProcShort (glColorMaski)
1246 && FindProcShort (glGetBooleani_v)
1247 && FindProcShort (glGetIntegeri_v)
1248 && FindProcShort (glEnablei)
1249 && FindProcShort (glDisablei)
1250 && FindProcShort (glIsEnabledi)
1251 && FindProcShort (glBeginTransformFeedback)
1252 && FindProcShort (glEndTransformFeedback)
1253 && FindProcShort (glBindBufferRange)
1254 && FindProcShort (glBindBufferBase)
1255 && FindProcShort (glTransformFeedbackVaryings)
1256 && FindProcShort (glGetTransformFeedbackVarying)
1257 && FindProcShort (glClampColor)
1258 && FindProcShort (glBeginConditionalRender)
1259 && FindProcShort (glEndConditionalRender)
1260 && FindProcShort (glVertexAttribIPointer)
1261 && FindProcShort (glGetVertexAttribIiv)
1262 && FindProcShort (glGetVertexAttribIuiv)
1263 && FindProcShort (glVertexAttribI1i)
1264 && FindProcShort (glVertexAttribI2i)
1265 && FindProcShort (glVertexAttribI3i)
1266 && FindProcShort (glVertexAttribI4i)
1267 && FindProcShort (glVertexAttribI1ui)
1268 && FindProcShort (glVertexAttribI2ui)
1269 && FindProcShort (glVertexAttribI3ui)
1270 && FindProcShort (glVertexAttribI4ui)
1271 && FindProcShort (glVertexAttribI1iv)
1272 && FindProcShort (glVertexAttribI2iv)
1273 && FindProcShort (glVertexAttribI3iv)
1274 && FindProcShort (glVertexAttribI4iv)
1275 && FindProcShort (glVertexAttribI1uiv)
1276 && FindProcShort (glVertexAttribI2uiv)
1277 && FindProcShort (glVertexAttribI3uiv)
1278 && FindProcShort (glVertexAttribI4uiv)
1279 && FindProcShort (glVertexAttribI4bv)
1280 && FindProcShort (glVertexAttribI4sv)
1281 && FindProcShort (glVertexAttribI4ubv)
1282 && FindProcShort (glVertexAttribI4usv)
1283 && FindProcShort (glGetUniformuiv)
1284 && FindProcShort (glBindFragDataLocation)
1285 && FindProcShort (glGetFragDataLocation)
1286 && FindProcShort (glUniform1ui)
1287 && FindProcShort (glUniform2ui)
1288 && FindProcShort (glUniform3ui)
1289 && FindProcShort (glUniform4ui)
1290 && FindProcShort (glUniform1uiv)
1291 && FindProcShort (glUniform2uiv)
1292 && FindProcShort (glUniform3uiv)
1293 && FindProcShort (glUniform4uiv)
1294 && FindProcShort (glTexParameterIiv)
1295 && FindProcShort (glTexParameterIuiv)
1296 && FindProcShort (glGetTexParameterIiv)
1297 && FindProcShort (glGetTexParameterIuiv)
1298 && FindProcShort (glClearBufferiv)
1299 && FindProcShort (glClearBufferuiv)
1300 && FindProcShort (glClearBufferfv)
1301 && FindProcShort (glClearBufferfi)
1302 && FindProcShort (glGetStringi);
1304 // load GL_ARB_uniform_buffer_object (added to OpenGL 3.1 core)
1305 const bool hasUBO = (IsGlGreaterEqual (3, 1) || CheckExtension ("GL_ARB_uniform_buffer_object"))
1306 && FindProcShort (glGetUniformIndices)
1307 && FindProcShort (glGetActiveUniformsiv)
1308 && FindProcShort (glGetActiveUniformName)
1309 && FindProcShort (glGetUniformBlockIndex)
1310 && FindProcShort (glGetActiveUniformBlockiv)
1311 && FindProcShort (glGetActiveUniformBlockName)
1312 && FindProcShort (glUniformBlockBinding);
1314 // load GL_ARB_copy_buffer (added to OpenGL 3.1 core)
1315 const bool hasCopyBufSubData = (IsGlGreaterEqual (3, 1) || CheckExtension ("GL_ARB_copy_buffer"))
1316 && FindProcShort (glCopyBufferSubData);
1320 // NPOT textures are required by OpenGL 2.0 specifications
1321 // but doesn't hardware accelerated by some ancient OpenGL 2.1 hardware (GeForce FX, RadeOn 9700 etc.)
1322 arbNPTW = Standard_True;
1323 arbTexRG = Standard_True;
1326 // load OpenGL 3.1 new functions
1327 has31 = IsGlGreaterEqual (3, 1)
1329 && hasCopyBufSubData
1330 && FindProcShort (glDrawArraysInstanced)
1331 && FindProcShort (glDrawElementsInstanced)
1332 && FindProcShort (glTexBuffer)
1333 && FindProcShort (glPrimitiveRestartIndex);
1335 // load GL_ARB_draw_elements_base_vertex (added to OpenGL 3.2 core)
1336 const bool hasDrawElemsBaseVert = (IsGlGreaterEqual (3, 2) || CheckExtension ("GL_ARB_draw_elements_base_vertex"))
1337 && FindProcShort (glDrawElementsBaseVertex)
1338 && FindProcShort (glDrawRangeElementsBaseVertex)
1339 && FindProcShort (glDrawElementsInstancedBaseVertex)
1340 && FindProcShort (glMultiDrawElementsBaseVertex);
1342 // load GL_ARB_provoking_vertex (added to OpenGL 3.2 core)
1343 const bool hasProvokingVert = (IsGlGreaterEqual (3, 2) || CheckExtension ("GL_ARB_provoking_vertex"))
1344 && FindProcShort (glProvokingVertex);
1346 // load GL_ARB_sync (added to OpenGL 3.2 core)
1347 const bool hasSync = (IsGlGreaterEqual (3, 2) || CheckExtension ("GL_ARB_sync"))
1348 && FindProcShort (glFenceSync)
1349 && FindProcShort (glIsSync)
1350 && FindProcShort (glDeleteSync)
1351 && FindProcShort (glClientWaitSync)
1352 && FindProcShort (glWaitSync)
1353 && FindProcShort (glGetInteger64v)
1354 && FindProcShort (glGetSynciv);
1356 // load GL_ARB_texture_multisample (added to OpenGL 3.2 core)
1357 const bool hasTextureMultisample = (IsGlGreaterEqual (3, 2) || CheckExtension ("GL_ARB_texture_multisample"))
1358 && FindProcShort (glTexImage2DMultisample)
1359 && FindProcShort (glTexImage3DMultisample)
1360 && FindProcShort (glGetMultisamplefv)
1361 && FindProcShort (glSampleMaski);
1363 // load OpenGL 3.2 new functions
1364 has32 = IsGlGreaterEqual (3, 2)
1365 && hasDrawElemsBaseVert
1368 && hasTextureMultisample
1369 && FindProcShort (glGetInteger64i_v)
1370 && FindProcShort (glGetBufferParameteri64v)
1371 && FindProcShort (glFramebufferTexture);
1373 // load GL_ARB_blend_func_extended (added to OpenGL 3.3 core)
1374 const bool hasBlendFuncExtended = (IsGlGreaterEqual (3, 3) || CheckExtension ("GL_ARB_blend_func_extended"))
1375 && FindProcShort (glBindFragDataLocationIndexed)
1376 && FindProcShort (glGetFragDataIndex);
1378 // load GL_ARB_sampler_objects (added to OpenGL 3.3 core)
1379 const bool hasSamplerObjects = (IsGlGreaterEqual (3, 3) || CheckExtension ("GL_ARB_sampler_objects"))
1380 && FindProcShort (glGenSamplers)
1381 && FindProcShort (glDeleteSamplers)
1382 && FindProcShort (glIsSampler)
1383 && FindProcShort (glBindSampler)
1384 && FindProcShort (glSamplerParameteri)
1385 && FindProcShort (glSamplerParameteriv)
1386 && FindProcShort (glSamplerParameterf)
1387 && FindProcShort (glSamplerParameterfv)
1388 && FindProcShort (glSamplerParameterIiv)
1389 && FindProcShort (glSamplerParameterIuiv)
1390 && FindProcShort (glGetSamplerParameteriv)
1391 && FindProcShort (glGetSamplerParameterIiv)
1392 && FindProcShort (glGetSamplerParameterfv)
1393 && FindProcShort (glGetSamplerParameterIuiv);
1395 // load GL_ARB_timer_query (added to OpenGL 3.3 core)
1396 const bool hasTimerQuery = (IsGlGreaterEqual (3, 3) || CheckExtension ("GL_ARB_timer_query"))
1397 && FindProcShort (glQueryCounter)
1398 && FindProcShort (glGetQueryObjecti64v)
1399 && FindProcShort (glGetQueryObjectui64v);
1401 // load GL_ARB_vertex_type_2_10_10_10_rev (added to OpenGL 3.3 core)
1402 const bool hasVertType21010101rev = (IsGlGreaterEqual (3, 3) || CheckExtension ("GL_ARB_vertex_type_2_10_10_10_rev"))
1403 && FindProcShort (glVertexP2ui)
1404 && FindProcShort (glVertexP2uiv)
1405 && FindProcShort (glVertexP3ui)
1406 && FindProcShort (glVertexP3uiv)
1407 && FindProcShort (glVertexP4ui)
1408 && FindProcShort (glVertexP4uiv)
1409 && FindProcShort (glTexCoordP1ui)
1410 && FindProcShort (glTexCoordP1uiv)
1411 && FindProcShort (glTexCoordP2ui)
1412 && FindProcShort (glTexCoordP2uiv)
1413 && FindProcShort (glTexCoordP3ui)
1414 && FindProcShort (glTexCoordP3uiv)
1415 && FindProcShort (glTexCoordP4ui)
1416 && FindProcShort (glTexCoordP4uiv)
1417 && FindProcShort (glMultiTexCoordP1ui)
1418 && FindProcShort (glMultiTexCoordP1uiv)
1419 && FindProcShort (glMultiTexCoordP2ui)
1420 && FindProcShort (glMultiTexCoordP2uiv)
1421 && FindProcShort (glMultiTexCoordP3ui)
1422 && FindProcShort (glMultiTexCoordP3uiv)
1423 && FindProcShort (glMultiTexCoordP4ui)
1424 && FindProcShort (glMultiTexCoordP4uiv)
1425 && FindProcShort (glNormalP3ui)
1426 && FindProcShort (glNormalP3uiv)
1427 && FindProcShort (glColorP3ui)
1428 && FindProcShort (glColorP3uiv)
1429 && FindProcShort (glColorP4ui)
1430 && FindProcShort (glColorP4uiv)
1431 && FindProcShort (glSecondaryColorP3ui)
1432 && FindProcShort (glSecondaryColorP3uiv)
1433 && FindProcShort (glVertexAttribP1ui)
1434 && FindProcShort (glVertexAttribP1uiv)
1435 && FindProcShort (glVertexAttribP2ui)
1436 && FindProcShort (glVertexAttribP2uiv)
1437 && FindProcShort (glVertexAttribP3ui)
1438 && FindProcShort (glVertexAttribP3uiv)
1439 && FindProcShort (glVertexAttribP4ui)
1440 && FindProcShort (glVertexAttribP4uiv);
1442 // load OpenGL 3.3 extra functions
1443 has33 = IsGlGreaterEqual (3, 3)
1444 && hasBlendFuncExtended
1445 && hasSamplerObjects
1447 && hasVertType21010101rev
1448 && FindProcShort (glVertexAttribDivisor);
1450 // load GL_ARB_draw_indirect (added to OpenGL 4.0 core)
1451 const bool hasDrawIndirect = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_draw_indirect"))
1452 && FindProcShort (glDrawArraysIndirect)
1453 && FindProcShort (glDrawElementsIndirect);
1455 // load GL_ARB_gpu_shader_fp64 (added to OpenGL 4.0 core)
1456 const bool hasShaderFP64 = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_gpu_shader_fp64"))
1457 && FindProcShort (glUniform1d)
1458 && FindProcShort (glUniform2d)
1459 && FindProcShort (glUniform3d)
1460 && FindProcShort (glUniform4d)
1461 && FindProcShort (glUniform1dv)
1462 && FindProcShort (glUniform2dv)
1463 && FindProcShort (glUniform3dv)
1464 && FindProcShort (glUniform4dv)
1465 && FindProcShort (glUniformMatrix2dv)
1466 && FindProcShort (glUniformMatrix3dv)
1467 && FindProcShort (glUniformMatrix4dv)
1468 && FindProcShort (glUniformMatrix2x3dv)
1469 && FindProcShort (glUniformMatrix2x4dv)
1470 && FindProcShort (glUniformMatrix3x2dv)
1471 && FindProcShort (glUniformMatrix3x4dv)
1472 && FindProcShort (glUniformMatrix4x2dv)
1473 && FindProcShort (glUniformMatrix4x3dv)
1474 && FindProcShort (glGetUniformdv);
1476 // load GL_ARB_shader_subroutine (added to OpenGL 4.0 core)
1477 const bool hasShaderSubroutine = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_shader_subroutine"))
1478 && FindProcShort (glGetSubroutineUniformLocation)
1479 && FindProcShort (glGetSubroutineIndex)
1480 && FindProcShort (glGetActiveSubroutineUniformiv)
1481 && FindProcShort (glGetActiveSubroutineUniformName)
1482 && FindProcShort (glGetActiveSubroutineName)
1483 && FindProcShort (glUniformSubroutinesuiv)
1484 && FindProcShort (glGetUniformSubroutineuiv)
1485 && FindProcShort (glGetProgramStageiv);
1487 // load GL_ARB_tessellation_shader (added to OpenGL 4.0 core)
1488 const bool hasTessellationShader = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_tessellation_shader"))
1489 && FindProcShort (glPatchParameteri)
1490 && FindProcShort (glPatchParameterfv);
1492 // load GL_ARB_transform_feedback2 (added to OpenGL 4.0 core)
1493 const bool hasTrsfFeedback2 = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_transform_feedback2"))
1494 && FindProcShort (glBindTransformFeedback)
1495 && FindProcShort (glDeleteTransformFeedbacks)
1496 && FindProcShort (glGenTransformFeedbacks)
1497 && FindProcShort (glIsTransformFeedback)
1498 && FindProcShort (glPauseTransformFeedback)
1499 && FindProcShort (glResumeTransformFeedback)
1500 && FindProcShort (glDrawTransformFeedback);
1502 // load GL_ARB_transform_feedback3 (added to OpenGL 4.0 core)
1503 const bool hasTrsfFeedback3 = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_transform_feedback3"))
1504 && FindProcShort (glDrawTransformFeedbackStream)
1505 && FindProcShort (glBeginQueryIndexed)
1506 && FindProcShort (glEndQueryIndexed)
1507 && FindProcShort (glGetQueryIndexediv);
1509 // load OpenGL 4.0 new functions
1510 has40 = IsGlGreaterEqual (4, 0)
1513 && hasShaderSubroutine
1514 && hasTessellationShader
1517 && FindProcShort (glMinSampleShading)
1518 && FindProcShort (glBlendEquationi)
1519 && FindProcShort (glBlendEquationSeparatei)
1520 && FindProcShort (glBlendFunci)
1521 && FindProcShort (glBlendFuncSeparatei);
1523 // load GL_ARB_ES2_compatibility (added to OpenGL 4.1 core)
1524 const bool hasES2Compatibility = (IsGlGreaterEqual (4, 1) || CheckExtension ("GL_ARB_ES2_compatibility"))
1525 && FindProcShort (glReleaseShaderCompiler)
1526 && FindProcShort (glShaderBinary)
1527 && FindProcShort (glGetShaderPrecisionFormat)
1528 && FindProcShort (glDepthRangef)
1529 && FindProcShort (glClearDepthf);
1531 // load GL_ARB_get_program_binary (added to OpenGL 4.1 core)
1532 const bool hasGetProgramBinary = (IsGlGreaterEqual (4, 1) || CheckExtension ("GL_ARB_get_program_binary"))
1533 && FindProcShort (glGetProgramBinary)
1534 && FindProcShort (glProgramBinary)
1535 && FindProcShort (glProgramParameteri);
1538 // load GL_ARB_separate_shader_objects (added to OpenGL 4.1 core)
1539 const bool hasSeparateShaderObjects = (IsGlGreaterEqual (4, 1) || CheckExtension ("GL_ARB_separate_shader_objects"))
1540 && FindProcShort (glUseProgramStages)
1541 && FindProcShort (glActiveShaderProgram)
1542 && FindProcShort (glCreateShaderProgramv)
1543 && FindProcShort (glBindProgramPipeline)
1544 && FindProcShort (glDeleteProgramPipelines)
1545 && FindProcShort (glGenProgramPipelines)
1546 && FindProcShort (glIsProgramPipeline)
1547 && FindProcShort (glGetProgramPipelineiv)
1548 && FindProcShort (glProgramUniform1i)
1549 && FindProcShort (glProgramUniform1iv)
1550 && FindProcShort (glProgramUniform1f)
1551 && FindProcShort (glProgramUniform1fv)
1552 && FindProcShort (glProgramUniform1d)
1553 && FindProcShort (glProgramUniform1dv)
1554 && FindProcShort (glProgramUniform1ui)
1555 && FindProcShort (glProgramUniform1uiv)
1556 && FindProcShort (glProgramUniform2i)
1557 && FindProcShort (glProgramUniform2iv)
1558 && FindProcShort (glProgramUniform2f)
1559 && FindProcShort (glProgramUniform2fv)
1560 && FindProcShort (glProgramUniform2d)
1561 && FindProcShort (glProgramUniform2dv)
1562 && FindProcShort (glProgramUniform2ui)
1563 && FindProcShort (glProgramUniform2uiv)
1564 && FindProcShort (glProgramUniform3i)
1565 && FindProcShort (glProgramUniform3iv)
1566 && FindProcShort (glProgramUniform3f)
1567 && FindProcShort (glProgramUniform3fv)
1568 && FindProcShort (glProgramUniform3d)
1569 && FindProcShort (glProgramUniform3dv)
1570 && FindProcShort (glProgramUniform3ui)
1571 && FindProcShort (glProgramUniform3uiv)
1572 && FindProcShort (glProgramUniform4i)
1573 && FindProcShort (glProgramUniform4iv)
1574 && FindProcShort (glProgramUniform4f)
1575 && FindProcShort (glProgramUniform4fv)
1576 && FindProcShort (glProgramUniform4d)
1577 && FindProcShort (glProgramUniform4dv)
1578 && FindProcShort (glProgramUniform4ui)
1579 && FindProcShort (glProgramUniform4uiv)
1580 && FindProcShort (glProgramUniformMatrix2fv)
1581 && FindProcShort (glProgramUniformMatrix3fv)
1582 && FindProcShort (glProgramUniformMatrix4fv)
1583 && FindProcShort (glProgramUniformMatrix2dv)
1584 && FindProcShort (glProgramUniformMatrix3dv)
1585 && FindProcShort (glProgramUniformMatrix4dv)
1586 && FindProcShort (glProgramUniformMatrix2x3fv)
1587 && FindProcShort (glProgramUniformMatrix3x2fv)
1588 && FindProcShort (glProgramUniformMatrix2x4fv)
1589 && FindProcShort (glProgramUniformMatrix4x2fv)
1590 && FindProcShort (glProgramUniformMatrix3x4fv)
1591 && FindProcShort (glProgramUniformMatrix4x3fv)
1592 && FindProcShort (glProgramUniformMatrix2x3dv)
1593 && FindProcShort (glProgramUniformMatrix3x2dv)
1594 && FindProcShort (glProgramUniformMatrix2x4dv)
1595 && FindProcShort (glProgramUniformMatrix4x2dv)
1596 && FindProcShort (glProgramUniformMatrix3x4dv)
1597 && FindProcShort (glProgramUniformMatrix4x3dv)
1598 && FindProcShort (glValidateProgramPipeline)
1599 && FindProcShort (glGetProgramPipelineInfoLog);
1601 // load GL_ARB_vertex_attrib_64bit (added to OpenGL 4.1 core)
1602 const bool hasVertAttrib64bit = (IsGlGreaterEqual (4, 1) || CheckExtension ("GL_ARB_vertex_attrib_64bit"))
1603 && FindProcShort (glVertexAttribL1d)
1604 && FindProcShort (glVertexAttribL2d)
1605 && FindProcShort (glVertexAttribL3d)
1606 && FindProcShort (glVertexAttribL4d)
1607 && FindProcShort (glVertexAttribL1dv)
1608 && FindProcShort (glVertexAttribL2dv)
1609 && FindProcShort (glVertexAttribL3dv)
1610 && FindProcShort (glVertexAttribL4dv)
1611 && FindProcShort (glVertexAttribLPointer)
1612 && FindProcShort (glGetVertexAttribLdv);
1614 // load GL_ARB_viewport_array (added to OpenGL 4.1 core)
1615 const bool hasViewportArray = (IsGlGreaterEqual (4, 1) || CheckExtension ("GL_ARB_viewport_array"))
1616 && FindProcShort (glViewportArrayv)
1617 && FindProcShort (glViewportIndexedf)
1618 && FindProcShort (glViewportIndexedfv)
1619 && FindProcShort (glScissorArrayv)
1620 && FindProcShort (glScissorIndexed)
1621 && FindProcShort (glScissorIndexedv)
1622 && FindProcShort (glDepthRangeArrayv)
1623 && FindProcShort (glDepthRangeIndexed)
1624 && FindProcShort (glGetFloati_v)
1625 && FindProcShort (glGetDoublei_v);
1627 has41 = IsGlGreaterEqual (4, 1)
1628 && hasES2Compatibility
1629 && hasGetProgramBinary
1630 && hasSeparateShaderObjects
1631 && hasVertAttrib64bit
1632 && hasViewportArray;
1634 // load GL_ARB_base_instance (added to OpenGL 4.2 core)
1635 const bool hasBaseInstance = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_base_instance"))
1636 && FindProcShort (glDrawArraysInstancedBaseInstance)
1637 && FindProcShort (glDrawElementsInstancedBaseInstance)
1638 && FindProcShort (glDrawElementsInstancedBaseVertexBaseInstance);
1640 // load GL_ARB_transform_feedback_instanced (added to OpenGL 4.2 core)
1641 const bool hasTrsfFeedbackInstanced = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_transform_feedback_instanced"))
1642 && FindProcShort (glDrawTransformFeedbackInstanced)
1643 && FindProcShort (glDrawTransformFeedbackStreamInstanced);
1645 // load GL_ARB_internalformat_query (added to OpenGL 4.2 core)
1646 const bool hasInternalFormatQuery = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_internalformat_query"))
1647 && FindProcShort (glGetInternalformativ);
1649 // load GL_ARB_shader_atomic_counters (added to OpenGL 4.2 core)
1650 const bool hasShaderAtomicCounters = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_shader_atomic_counters"))
1651 && FindProcShort (glGetActiveAtomicCounterBufferiv);
1653 // load GL_ARB_shader_image_load_store (added to OpenGL 4.2 core)
1654 const bool hasShaderImgLoadStore = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_shader_image_load_store"))
1655 && FindProcShort (glBindImageTexture)
1656 && FindProcShort (glMemoryBarrier);
1658 // load GL_ARB_texture_storage (added to OpenGL 4.2 core)
1659 const bool hasTextureStorage = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_texture_storage"))
1660 && FindProcShort (glTexStorage1D)
1661 && FindProcShort (glTexStorage2D)
1662 && FindProcShort (glTexStorage3D)
1663 && FindProcShort (glTextureStorage1DEXT)
1664 && FindProcShort (glTextureStorage2DEXT)
1665 && FindProcShort (glTextureStorage3DEXT);
1667 has42 = IsGlGreaterEqual (4, 2)
1669 && hasTrsfFeedbackInstanced
1670 && hasInternalFormatQuery
1671 && hasShaderAtomicCounters
1672 && hasShaderImgLoadStore
1673 && hasTextureStorage;
1675 has43 = IsGlGreaterEqual (4, 3)
1676 && FindProcShort (glClearBufferData)
1677 && FindProcShort (glClearBufferSubData)
1678 && FindProcShort (glDispatchCompute)
1679 && FindProcShort (glDispatchComputeIndirect)
1680 && FindProcShort (glCopyImageSubData)
1681 && FindProcShort (glFramebufferParameteri)
1682 && FindProcShort (glGetFramebufferParameteriv)
1683 && FindProcShort (glGetInternalformati64v)
1684 && FindProcShort (glInvalidateTexSubImage)
1685 && FindProcShort (glInvalidateTexImage)
1686 && FindProcShort (glInvalidateBufferSubData)
1687 && FindProcShort (glInvalidateBufferData)
1688 && FindProcShort (glInvalidateFramebuffer)
1689 && FindProcShort (glInvalidateSubFramebuffer)
1690 && FindProcShort (glMultiDrawArraysIndirect)
1691 && FindProcShort (glMultiDrawElementsIndirect)
1692 && FindProcShort (glGetProgramInterfaceiv)
1693 && FindProcShort (glGetProgramResourceIndex)
1694 && FindProcShort (glGetProgramResourceName)
1695 && FindProcShort (glGetProgramResourceiv)
1696 && FindProcShort (glGetProgramResourceLocation)
1697 && FindProcShort (glGetProgramResourceLocationIndex)
1698 && FindProcShort (glShaderStorageBlockBinding)
1699 && FindProcShort (glTexBufferRange)
1700 && FindProcShort (glTexStorage2DMultisample)
1701 && FindProcShort (glTexStorage3DMultisample)
1702 && FindProcShort (glTextureView)
1703 && FindProcShort (glBindVertexBuffer)
1704 && FindProcShort (glVertexAttribFormat)
1705 && FindProcShort (glVertexAttribIFormat)
1706 && FindProcShort (glVertexAttribLFormat)
1707 && FindProcShort (glVertexAttribBinding)
1708 && FindProcShort (glVertexBindingDivisor)
1709 && FindProcShort (glDebugMessageControl)
1710 && FindProcShort (glDebugMessageInsert)
1711 && FindProcShort (glDebugMessageCallback)
1712 && FindProcShort (glGetDebugMessageLog)
1713 && FindProcShort (glPushDebugGroup)
1714 && FindProcShort (glPopDebugGroup)
1715 && FindProcShort (glObjectLabel)
1716 && FindProcShort (glGetObjectLabel)
1717 && FindProcShort (glObjectPtrLabel)
1718 && FindProcShort (glGetObjectPtrLabel);
1720 // load GL_ARB_clear_texture (added to OpenGL 4.4 core)
1721 bool arbTexClear = (IsGlGreaterEqual (4, 4) || CheckExtension ("GL_ARB_clear_texture"))
1722 && FindProcShort (glClearTexImage)
1723 && FindProcShort (glClearTexSubImage);
1725 has44 = IsGlGreaterEqual (4, 4)
1727 && FindProcShort (glBufferStorage)
1728 && FindProcShort (glBindBuffersBase)
1729 && FindProcShort (glBindBuffersRange)
1730 && FindProcShort (glBindTextures)
1731 && FindProcShort (glBindSamplers)
1732 && FindProcShort (glBindImageTextures)
1733 && FindProcShort (glBindVertexBuffers);
1735 // initialize TBO extension (ARB)
1737 && CheckExtension ("GL_ARB_texture_buffer_object")
1738 && FindProc ("glTexBufferARB", myFuncs->glTexBuffer))
1740 arbTBO = (OpenGl_ArbTBO* )(&(*myFuncs));
1742 arbTboRGB32 = CheckExtension ("GL_ARB_texture_buffer_object_rgb32");
1744 // initialize hardware instancing extension (ARB)
1746 && CheckExtension ("GL_ARB_draw_instanced")
1747 && FindProc ("glDrawArraysInstancedARB", myFuncs->glDrawArraysInstanced)
1748 && FindProc ("glDrawElementsInstancedARB", myFuncs->glDrawElementsInstanced))
1750 arbIns = (OpenGl_ArbIns* )(&(*myFuncs));
1753 // initialize FBO extension (ARB)
1756 arbFBO = (OpenGl_ArbFBO* )(&(*myFuncs));
1757 extPDS = Standard_True; // extension for EXT, but part of ARB
1760 // initialize GS extension (EXT)
1761 if (CheckExtension ("GL_EXT_geometry_shader4")
1762 && FindProcShort (glProgramParameteriEXT))
1764 extGS = (OpenGl_ExtGS* )(&(*myFuncs));
1767 // initialize bindless texture extension (ARB)
1768 if (CheckExtension ("GL_ARB_bindless_texture")
1769 && FindProcShort (glGetTextureHandleARB)
1770 && FindProcShort (glGetTextureSamplerHandleARB)
1771 && FindProcShort (glMakeTextureHandleResidentARB)
1772 && FindProcShort (glMakeTextureHandleNonResidentARB)
1773 && FindProcShort (glGetImageHandleARB)
1774 && FindProcShort (glMakeImageHandleResidentARB)
1775 && FindProcShort (glMakeImageHandleNonResidentARB)
1776 && FindProcShort (glUniformHandleui64ARB)
1777 && FindProcShort (glUniformHandleui64vARB)
1778 && FindProcShort (glProgramUniformHandleui64ARB)
1779 && FindProcShort (glProgramUniformHandleui64vARB)
1780 && FindProcShort (glIsTextureHandleResidentARB)
1781 && FindProcShort (glIsImageHandleResidentARB)
1782 && FindProcShort (glVertexAttribL1ui64ARB)
1783 && FindProcShort (glVertexAttribL1ui64vARB)
1784 && FindProcShort (glGetVertexAttribLui64vARB))
1786 arbTexBindless = (OpenGl_ArbTexBindless* )(&(*myFuncs));
1813 core15 = (OpenGl_GlCore15* )(&(*myFuncs));
1814 core15fwd = (OpenGl_GlCore15Fwd* )(&(*myFuncs));
1823 core20 = (OpenGl_GlCore20* )(&(*myFuncs));
1824 core20fwd = (OpenGl_GlCore20Fwd* )(&(*myFuncs));
1846 arbTBO = (OpenGl_ArbTBO* )(&(*myFuncs));
1847 arbIns = (OpenGl_ArbIns* )(&(*myFuncs));
1855 core32 = (OpenGl_GlCore32* )(&(*myFuncs));
1856 core32back = (OpenGl_GlCore32Back* )(&(*myFuncs));
1864 core33 = (OpenGl_GlCore33* )(&(*myFuncs));
1865 core33back = (OpenGl_GlCore33Back* )(&(*myFuncs));
1867 // initialize sampler object
1868 myTexSampler = new OpenGl_Sampler();
1869 myTexSampler->Init (*this);
1877 arbTboRGB32 = Standard_True; // in core since OpenGL 4.0
1885 core41 = (OpenGl_GlCore41* )(&(*myFuncs));
1886 core41back = (OpenGl_GlCore41Back* )(&(*myFuncs));
1894 core42 = (OpenGl_GlCore42* )(&(*myFuncs));
1895 core42back = (OpenGl_GlCore42Back* )(&(*myFuncs));
1903 core43 = (OpenGl_GlCore43* )(&(*myFuncs));
1904 core43back = (OpenGl_GlCore43Back* )(&(*myFuncs));
1912 core44 = (OpenGl_GlCore44* )(&(*myFuncs));
1913 core44back = (OpenGl_GlCore44Back* )(&(*myFuncs));
1917 // =======================================================================
1918 // function : MemoryInfo
1920 // =======================================================================
1921 Standard_Size OpenGl_Context::AvailableMemory() const
1923 #if !defined(GL_ES_VERSION_2_0)
1926 // this is actually information for VBO pool
1927 // however because pools are mostly shared
1928 // it can be used for total GPU memory estimations
1931 glGetIntegerv (GL_VBO_FREE_MEMORY_ATI, aMemInfo);
1932 // returned value is in KiB, however this maybe changed in future
1933 return Standard_Size(aMemInfo[0]) * 1024;
1937 // current available dedicated video memory (in KiB), currently unused GPU memory
1939 glGetIntegerv (GL_GPU_MEMORY_INFO_CURRENT_AVAILABLE_VIDMEM_NVX, &aMemInfo);
1940 return Standard_Size(aMemInfo) * 1024;
1946 // =======================================================================
1947 // function : MemoryInfo
1949 // =======================================================================
1950 TCollection_AsciiString OpenGl_Context::MemoryInfo() const
1952 TCollection_AsciiString anInfo;
1953 #if !defined(GL_ES_VERSION_2_0)
1957 memset (aValues, 0, sizeof(aValues));
1958 glGetIntegerv (GL_VBO_FREE_MEMORY_ATI, aValues);
1960 // total memory free in the pool
1961 anInfo += TCollection_AsciiString (" GPU free memory: ") + (aValues[0] / 1024) + " MiB\n";
1963 // largest available free block in the pool
1964 anInfo += TCollection_AsciiString (" Largest free block: ") + (aValues[1] / 1024) + " MiB\n";
1965 if (aValues[2] != aValues[0])
1967 // total auxiliary memory free
1968 anInfo += TCollection_AsciiString (" Free memory: ") + (aValues[2] / 1024) + " MiB\n";
1973 //current available dedicated video memory (in KiB), currently unused GPU memory
1975 glGetIntegerv (GL_GPU_MEMORY_INFO_CURRENT_AVAILABLE_VIDMEM_NVX, &aValue);
1976 anInfo += TCollection_AsciiString (" GPU free memory: ") + (aValue / 1024) + " MiB\n";
1978 // dedicated video memory, total size (in KiB) of the GPU memory
1979 GLint aDedicated = 0;
1980 glGetIntegerv (GL_GPU_MEMORY_INFO_DEDICATED_VIDMEM_NVX, &aDedicated);
1981 anInfo += TCollection_AsciiString (" GPU memory: ") + (aDedicated / 1024) + " MiB\n";
1983 // total available memory, total size (in KiB) of the memory available for allocations
1984 glGetIntegerv (GL_GPU_MEMORY_INFO_TOTAL_AVAILABLE_MEMORY_NVX, &aValue);
1985 if (aValue != aDedicated)
1987 // different only for special configurations
1988 anInfo += TCollection_AsciiString (" Total memory: ") + (aValue / 1024) + " MiB\n";
1996 // =======================================================================
1997 // function : GetResource
1999 // =======================================================================
2000 const Handle(OpenGl_Resource)& OpenGl_Context::GetResource (const TCollection_AsciiString& theKey) const
2002 return mySharedResources->IsBound (theKey) ? mySharedResources->Find (theKey) : NULL_GL_RESOURCE;
2005 // =======================================================================
2006 // function : ShareResource
2008 // =======================================================================
2009 Standard_Boolean OpenGl_Context::ShareResource (const TCollection_AsciiString& theKey,
2010 const Handle(OpenGl_Resource)& theResource)
2012 if (theKey.IsEmpty() || theResource.IsNull())
2014 return Standard_False;
2016 return mySharedResources->Bind (theKey, theResource);
2019 // =======================================================================
2020 // function : ReleaseResource
2022 // =======================================================================
2023 void OpenGl_Context::ReleaseResource (const TCollection_AsciiString& theKey,
2024 const Standard_Boolean theToDelay)
2026 if (!mySharedResources->IsBound (theKey))
2030 const Handle(OpenGl_Resource)& aRes = mySharedResources->Find (theKey);
2031 if (aRes->GetRefCount() > 1)
2038 myDelayed->Bind (theKey, 1);
2042 aRes->Release (this);
2043 mySharedResources->UnBind (theKey);
2047 // =======================================================================
2048 // function : DelayedRelease
2050 // =======================================================================
2051 void OpenGl_Context::DelayedRelease (Handle(OpenGl_Resource)& theResource)
2053 myUnusedResources->Prepend (theResource);
2054 theResource.Nullify();
2057 // =======================================================================
2058 // function : ReleaseDelayed
2060 // =======================================================================
2061 void OpenGl_Context::ReleaseDelayed()
2063 // release queued elements
2064 while (!myUnusedResources->IsEmpty())
2066 myUnusedResources->First()->Release (this);
2067 myUnusedResources->RemoveFirst();
2070 // release delayed shared resources
2071 NCollection_Vector<TCollection_AsciiString> aDeadList;
2072 for (NCollection_DataMap<TCollection_AsciiString, Standard_Integer>::Iterator anIter (*myDelayed);
2073 anIter.More(); anIter.Next())
2075 if (++anIter.ChangeValue() <= 2)
2077 continue; // postpone release one more frame to ensure noone use it periodically
2080 const TCollection_AsciiString& aKey = anIter.Key();
2081 if (!mySharedResources->IsBound (aKey))
2083 // mixed unshared strategy delayed/undelayed was used!
2084 aDeadList.Append (aKey);
2088 Handle(OpenGl_Resource)& aRes = mySharedResources->ChangeFind (aKey);
2089 if (aRes->GetRefCount() > 1)
2091 // should be only 1 instance in mySharedResources
2092 // if not - resource was reused again
2093 aDeadList.Append (aKey);
2097 // release resource if no one requiested it more than 2 redraw calls
2098 aRes->Release (this);
2099 mySharedResources->UnBind (aKey);
2100 aDeadList.Append (aKey);
2103 for (Standard_Integer anIter = 0; anIter < aDeadList.Length(); ++anIter)
2105 myDelayed->UnBind (aDeadList.Value (anIter));
2109 // =======================================================================
2110 // function : BindProgram
2112 // =======================================================================
2113 Standard_Boolean OpenGl_Context::BindProgram (const Handle(OpenGl_ShaderProgram)& theProgram)
2115 if (core20fwd == NULL)
2117 return Standard_False;
2120 if (theProgram.IsNull()
2121 || !theProgram->IsValid())
2123 if (!myActiveProgram.IsNull())
2125 core20fwd->glUseProgram (OpenGl_ShaderProgram::NO_PROGRAM);
2126 myActiveProgram.Nullify();
2128 return Standard_False;
2131 myActiveProgram = theProgram;
2132 core20fwd->glUseProgram (theProgram->ProgramId());
2133 return Standard_True;
2136 // =======================================================================
2137 // function : SetColor4fv
2139 // =======================================================================
2140 void OpenGl_Context::SetColor4fv (const OpenGl_Vec4& theColor)
2142 if (!myActiveProgram.IsNull())
2144 myActiveProgram->SetUniform (this, myActiveProgram->GetStateLocation (OpenGl_OCCT_COLOR), theColor);
2146 #if !defined(GL_ES_VERSION_2_0)
2147 else if (core11 != NULL)
2149 core11->glColor4fv (theColor.GetData());
2154 // =======================================================================
2155 // function : SetPointSize
2157 // =======================================================================
2158 void OpenGl_Context::SetPointSize (const Standard_ShortReal theSize)
2160 if (!myActiveProgram.IsNull())
2162 myActiveProgram->SetUniform (this, myActiveProgram->GetStateLocation (OpenGl_OCCT_POINT_SIZE), theSize);
2163 #if !defined(GL_ES_VERSION_2_0)
2164 //myContext->core11fwd->glEnable (GL_VERTEX_PROGRAM_POINT_SIZE);
2167 #if !defined(GL_ES_VERSION_2_0)
2170 core11fwd->glPointSize (theSize);
2171 if (core20fwd != NULL)
2173 //myContext->core11fwd->glDisable (GL_VERTEX_PROGRAM_POINT_SIZE);
2179 // =======================================================================
2180 // function : SetGlNormalizeEnabled
2182 // =======================================================================
2183 Standard_Boolean OpenGl_Context::SetGlNormalizeEnabled (Standard_Boolean isEnabled)
2185 if (isEnabled == myIsGlNormalizeEnabled)
2187 return myIsGlNormalizeEnabled;
2190 Standard_Boolean anOldGlNormalize = myIsGlNormalizeEnabled;
2192 myIsGlNormalizeEnabled = isEnabled;
2194 #if !defined(GL_ES_VERSION_2_0)
2197 glEnable (GL_NORMALIZE);
2201 glDisable (GL_NORMALIZE);
2205 return anOldGlNormalize;