1 // Created on: 2012-01-26
2 // Created by: Kirill GAVRILOV
3 // Copyright (c) 2012-2014 OPEN CASCADE SAS
5 // This file is part of Open CASCADE Technology software library.
7 // This library is free software; you can redistribute it and/or modify it under
8 // the terms of the GNU Lesser General Public License version 2.1 as published
9 // by the Free Software Foundation, with special exception defined in the file
10 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
11 // distribution for complete text of the license and disclaimer of any warranty.
13 // Alternatively, this file may be used under the terms of Open CASCADE
14 // commercial license or contractual agreement.
20 #include <OpenGl_Context.hxx>
22 #include <OpenGl_ArbTBO.hxx>
23 #include <OpenGl_ArbIns.hxx>
24 #include <OpenGl_ArbDbg.hxx>
25 #include <OpenGl_ArbFBO.hxx>
26 #include <OpenGl_ExtGS.hxx>
27 #include <OpenGl_GlCore20.hxx>
28 #include <OpenGl_ShaderManager.hxx>
30 #include <Message_Messenger.hxx>
32 #include <NCollection_Vector.hxx>
34 #include <Standard_ProgramError.hxx>
39 #pragma comment(lib, "libEGL.lib")
43 #elif defined(__APPLE__) && !defined(MACOSX_USE_GLX)
46 #include <GL/glx.h> // glXGetProcAddress()
49 // GL_NVX_gpu_memory_info
50 #ifndef GL_GPU_MEMORY_INFO_DEDICATED_VIDMEM_NVX
53 GL_GPU_MEMORY_INFO_DEDICATED_VIDMEM_NVX = 0x9047,
54 GL_GPU_MEMORY_INFO_TOTAL_AVAILABLE_MEMORY_NVX = 0x9048,
55 GL_GPU_MEMORY_INFO_CURRENT_AVAILABLE_VIDMEM_NVX = 0x9049,
56 GL_GPU_MEMORY_INFO_EVICTION_COUNT_NVX = 0x904A,
57 GL_GPU_MEMORY_INFO_EVICTED_MEMORY_NVX = 0x904B
61 IMPLEMENT_STANDARD_HANDLE (OpenGl_Context, Standard_Transient)
62 IMPLEMENT_STANDARD_RTTIEXT(OpenGl_Context, Standard_Transient)
66 static const Handle(OpenGl_Resource) NULL_GL_RESOURCE;
69 // =======================================================================
70 // function : OpenGl_Context
72 // =======================================================================
73 OpenGl_Context::OpenGl_Context (const Handle(OpenGl_Caps)& theCaps)
90 caps (!theCaps.IsNull() ? theCaps : new OpenGl_Caps()),
91 #if defined(GL_ES_VERSION_2_0)
92 hasHighp (Standard_False),
93 hasTexRGBA8(Standard_False),
95 hasHighp (Standard_True),
96 hasTexRGBA8(Standard_True),
98 arbNPTW(Standard_False),
104 extBgra(Standard_False),
105 extAnis(Standard_False),
106 extPDS (Standard_False),
107 atiMem (Standard_False),
108 nvxMem (Standard_False),
109 mySharedResources (new OpenGl_ResourcesMap()),
110 myDelayed (new OpenGl_DelayReleaseMap()),
111 myUnusedResources (new OpenGl_ResourcesStack()),
113 myGlLibHandle (NULL),
114 myFuncs (new OpenGl_GlFunctions()),
116 myTexClamp (GL_CLAMP_TO_EDGE),
121 myIsInitialized (Standard_False),
122 myIsStereoBuffers (Standard_False),
123 myIsGlNormalizeEnabled (Standard_False),
124 #if !defined(GL_ES_VERSION_2_0)
125 myRenderMode (GL_RENDER),
131 #if defined(MAC_OS_X_VERSION_10_3) && !defined(MACOSX_USE_GLX)
132 // Vendors can not extend functionality on this system
133 // and developers are limited to OpenGL support provided by Mac OS X SDK.
134 // We retrieve function pointers from system library
135 // to generalize extensions support on all platforms.
136 // In this way we also reach binary compatibility benefit between OS releases
137 // if some newest functionality is optionally used.
138 // Notice that GL version / extension availability checks are required
139 // because function pointers may be available but not functionality itself
140 // (depends on renderer).
141 myGlLibHandle = dlopen ("/System/Library/Frameworks/OpenGL.framework/Versions/Current/OpenGL", RTLD_LAZY);
143 memset (myFuncs.operator->(), 0, sizeof(OpenGl_GlFunctions));
144 myShaderManager = new OpenGl_ShaderManager (this);
147 // =======================================================================
148 // function : ~OpenGl_Context
150 // =======================================================================
151 OpenGl_Context::~OpenGl_Context()
153 // release clean up queue
156 // release shared resources if any
157 if (((const Handle(Standard_Transient)& )mySharedResources)->GetRefCount() <= 1)
159 myShaderManager.Nullify();
160 for (NCollection_DataMap<TCollection_AsciiString, Handle(OpenGl_Resource)>::Iterator anIter (*mySharedResources);
161 anIter.More(); anIter.Next())
163 anIter.Value()->Release (this);
168 myShaderManager->SetContext (NULL);
170 mySharedResources.Nullify();
173 #if !defined(GL_ES_VERSION_2_0)
175 && caps->contextDebug
180 glGetPointerv (GL_DEBUG_CALLBACK_USER_PARAM_ARB, &aPtr);
183 arbDbg->glDebugMessageCallbackARB (NULL, NULL);
189 // =======================================================================
190 // function : MaxDegreeOfAnisotropy
192 // =======================================================================
193 Standard_Integer OpenGl_Context::MaxDegreeOfAnisotropy() const
198 // =======================================================================
199 // function : MaxTextureSize
201 // =======================================================================
202 Standard_Integer OpenGl_Context::MaxTextureSize() const
207 // =======================================================================
208 // function : MaxClipPlanes
210 // =======================================================================
211 Standard_Integer OpenGl_Context::MaxClipPlanes() const
213 return myMaxClipPlanes;
216 // =======================================================================
217 // function : SetDrawBufferLeft
219 // =======================================================================
220 void OpenGl_Context::SetDrawBufferLeft()
222 #if !defined(GL_ES_VERSION_2_0)
223 switch (myDrawBuffer)
227 glDrawBuffer (GL_BACK_LEFT);
228 myDrawBuffer = GL_BACK_LEFT;
231 case GL_FRONT_RIGHT :
233 glDrawBuffer (GL_FRONT_LEFT);
234 myDrawBuffer = GL_FRONT_LEFT;
237 case GL_FRONT_AND_BACK :
239 glDrawBuffer (GL_LEFT);
240 myDrawBuffer = GL_LEFT;
246 // =======================================================================
247 // function : SetDrawBufferRight
249 // =======================================================================
250 void OpenGl_Context::SetDrawBufferRight()
252 #if !defined(GL_ES_VERSION_2_0)
253 switch (myDrawBuffer)
257 glDrawBuffer (GL_BACK_RIGHT);
258 myDrawBuffer = GL_BACK_RIGHT;
263 glDrawBuffer (GL_FRONT_RIGHT);
264 myDrawBuffer = GL_FRONT_RIGHT;
267 case GL_FRONT_AND_BACK :
269 glDrawBuffer (GL_RIGHT);
270 myDrawBuffer = GL_RIGHT;
276 // =======================================================================
277 // function : SetDrawBufferMono
279 // =======================================================================
280 void OpenGl_Context::SetDrawBufferMono()
282 #if !defined(GL_ES_VERSION_2_0)
283 switch (myDrawBuffer)
287 glDrawBuffer (GL_BACK);
288 myDrawBuffer = GL_BACK;
292 case GL_FRONT_RIGHT :
293 glDrawBuffer (GL_FRONT);
294 myDrawBuffer = GL_FRONT;
299 glDrawBuffer (GL_FRONT_AND_BACK);
300 myDrawBuffer = GL_FRONT_AND_BACK;
306 // =======================================================================
307 // function : FetchState
309 // =======================================================================
310 void OpenGl_Context::FetchState()
312 #if !defined(GL_ES_VERSION_2_0)
313 // cache feedback mode state
314 glGetIntegerv (GL_RENDER_MODE, &myRenderMode);
316 // cache draw buffer state
317 glGetIntegerv (GL_DRAW_BUFFER, &myDrawBuffer);
321 // =======================================================================
324 // =======================================================================
325 void OpenGl_Context::Share (const Handle(OpenGl_Context)& theShareCtx)
327 if (!theShareCtx.IsNull())
329 mySharedResources = theShareCtx->mySharedResources;
330 myDelayed = theShareCtx->myDelayed;
331 myUnusedResources = theShareCtx->myUnusedResources;
332 myShaderManager = theShareCtx->myShaderManager;
336 #if !defined(__APPLE__) || defined(MACOSX_USE_GLX)
338 // =======================================================================
339 // function : IsCurrent
341 // =======================================================================
342 Standard_Boolean OpenGl_Context::IsCurrent() const
344 #if defined(HAVE_EGL)
345 if ((EGLDisplay )myDisplay == EGL_NO_DISPLAY
346 || (EGLSurface )myWindow == EGL_NO_SURFACE
347 || (EGLContext )myGContext == EGL_NO_CONTEXT)
349 return Standard_False;
352 return (((EGLDisplay )myDisplay == eglGetCurrentDisplay())
353 && ((EGLContext )myGContext == eglGetCurrentContext())
354 && ((EGLSurface )myWindow == eglGetCurrentSurface (EGL_DRAW)));
355 #elif defined(_WIN32)
356 if (myWindowDC == NULL || myGContext == NULL)
358 return Standard_False;
360 return (( (HDC )myWindowDC == wglGetCurrentDC())
361 && ((HGLRC )myGContext == wglGetCurrentContext()));
363 if (myDisplay == NULL || myWindow == 0 || myGContext == 0)
365 return Standard_False;
368 return ( ((Display* )myDisplay == glXGetCurrentDisplay())
369 && ((GLXContext )myGContext == glXGetCurrentContext())
370 && ((GLXDrawable )myWindow == glXGetCurrentDrawable()));
374 // =======================================================================
375 // function : MakeCurrent
377 // =======================================================================
378 Standard_Boolean OpenGl_Context::MakeCurrent()
380 #if defined(HAVE_EGL)
381 if ((EGLDisplay )myDisplay == EGL_NO_DISPLAY
382 || (EGLSurface )myWindow == EGL_NO_SURFACE
383 || (EGLContext )myGContext == EGL_NO_CONTEXT)
385 Standard_ProgramError_Raise_if (myIsInitialized, "OpenGl_Context::Init() should be called before!");
386 return Standard_False;
389 if (eglMakeCurrent ((EGLDisplay )myDisplay, (EGLSurface )myWindow, (EGLSurface )myWindow, (EGLContext )myGContext) != EGL_TRUE)
391 // if there is no current context it might be impossible to use glGetError() correctly
392 PushMessage (GL_DEBUG_SOURCE_WINDOW_SYSTEM_ARB, GL_DEBUG_TYPE_ERROR_ARB, 0, GL_DEBUG_SEVERITY_HIGH_ARB,
393 "eglMakeCurrent() has failed!");
394 myIsInitialized = Standard_False;
395 return Standard_False;
397 #elif defined(_WIN32)
398 if (myWindowDC == NULL || myGContext == NULL)
400 Standard_ProgramError_Raise_if (myIsInitialized, "OpenGl_Context::Init() should be called before!");
401 return Standard_False;
404 // technically it should be safe to activate already bound GL context
405 // however some drivers (Intel etc.) may FAIL doing this for unknown reason
408 myShaderManager->SetContext (this);
409 return Standard_True;
411 else if (wglMakeCurrent ((HDC )myWindowDC, (HGLRC )myGContext) != TRUE)
413 // notice that glGetError() couldn't be used here!
414 wchar_t* aMsgBuff = NULL;
415 DWORD anErrorCode = GetLastError();
416 FormatMessageW (FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
417 NULL, anErrorCode, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (wchar_t* )&aMsgBuff, 0, NULL);
418 TCollection_ExtendedString aMsg ("wglMakeCurrent() has failed. ");
419 if (aMsgBuff != NULL)
421 aMsg += (Standard_ExtString )aMsgBuff;
422 LocalFree (aMsgBuff);
424 PushMessage (GL_DEBUG_SOURCE_WINDOW_SYSTEM_ARB, GL_DEBUG_TYPE_ERROR_ARB, (unsigned int )anErrorCode, GL_DEBUG_SEVERITY_HIGH_ARB, aMsg);
425 myIsInitialized = Standard_False;
426 return Standard_False;
429 if (myDisplay == NULL || myWindow == 0 || myGContext == 0)
431 Standard_ProgramError_Raise_if (myIsInitialized, "OpenGl_Context::Init() should be called before!");
432 return Standard_False;
435 if (!glXMakeCurrent ((Display* )myDisplay, (GLXDrawable )myWindow, (GLXContext )myGContext))
437 // if there is no current context it might be impossible to use glGetError() correctly
438 PushMessage (GL_DEBUG_SOURCE_WINDOW_SYSTEM_ARB, GL_DEBUG_TYPE_ERROR_ARB, 0, GL_DEBUG_SEVERITY_HIGH_ARB,
439 "glXMakeCurrent() has failed!");
440 myIsInitialized = Standard_False;
441 return Standard_False;
444 myShaderManager->SetContext (this);
445 return Standard_True;
448 // =======================================================================
449 // function : SwapBuffers
451 // =======================================================================
452 void OpenGl_Context::SwapBuffers()
454 #if defined(HAVE_EGL)
455 if ((EGLSurface )myWindow != EGL_NO_SURFACE)
457 eglSwapBuffers ((EGLDisplay )myDisplay, (EGLSurface )myWindow);
459 #elif defined(_WIN32)
460 if ((HDC )myWindowDC != NULL)
462 ::SwapBuffers ((HDC )myWindowDC);
466 if ((Display* )myDisplay != NULL)
468 glXSwapBuffers ((Display* )myDisplay, (GLXDrawable )myWindow);
475 // =======================================================================
476 // function : findProc
478 // =======================================================================
479 void* OpenGl_Context::findProc (const char* theFuncName)
481 #if defined(HAVE_EGL)
482 return (void* )eglGetProcAddress (theFuncName);
483 #elif defined(_WIN32)
484 return wglGetProcAddress (theFuncName);
485 #elif defined(__APPLE__) && !defined(MACOSX_USE_GLX)
486 return (myGlLibHandle != NULL) ? dlsym (myGlLibHandle, theFuncName) : NULL;
488 return (void* )glXGetProcAddress ((const GLubyte* )theFuncName);
492 // =======================================================================
493 // function : CheckExtension
495 // =======================================================================
496 Standard_Boolean OpenGl_Context::CheckExtension (const char* theExtName) const
498 if (theExtName == NULL)
501 std::cerr << "CheckExtension called with NULL string!\n";
503 return Standard_False;
506 // available since OpenGL 3.0
507 // and the ONLY way to check extensions with OpenGL 3.1+ core profile
508 /**if (IsGlGreaterEqual (3, 0))
511 glGetIntegerv (GL_NUM_EXTENSIONS, &anExtNb);
512 for (GLint anIter = 0; anIter < anExtNb; ++anIter)
514 const char* anExtension = (const char* )core30->glGetStringi (GL_EXTENSIONS, (GLuint )anIter);
515 if (anExtension[anExtNameLen] == '\0' &&
516 strncmp (anExtension, theExtName, anExtNameLen) == 0)
518 return Standard_True;
521 return Standard_False;
524 // use old way with huge string for all extensions
525 const char* anExtString = (const char* )glGetString (GL_EXTENSIONS);
526 if (anExtString == NULL)
528 Messenger()->Send ("TKOpenGL: glGetString (GL_EXTENSIONS) has returned NULL! No GL context?", Message_Warning);
529 return Standard_False;
531 return CheckExtension (anExtString, theExtName);
534 // =======================================================================
535 // function : CheckExtension
537 // =======================================================================
538 Standard_Boolean OpenGl_Context::CheckExtension (const char* theExtString,
539 const char* theExtName)
541 if (theExtString == NULL)
543 return Standard_False;
546 // Search for theExtName in the extensions string.
547 // Use of strstr() is not sufficient because extension names can be prefixes of other extension names.
548 char* aPtrIter = (char* )theExtString;
549 const char* aPtrEnd = aPtrIter + strlen (theExtString);
550 const size_t anExtNameLen = strlen (theExtName);
551 while (aPtrIter < aPtrEnd)
553 const size_t n = strcspn (aPtrIter, " ");
554 if ((n == anExtNameLen) && (strncmp (aPtrIter, theExtName, anExtNameLen) == 0))
556 return Standard_True;
560 return Standard_False;
563 #if !defined(__APPLE__) || defined(MACOSX_USE_GLX)
565 // =======================================================================
568 // =======================================================================
569 Standard_Boolean OpenGl_Context::Init()
573 return Standard_True;
576 #if defined(HAVE_EGL)
577 myDisplay = (Aspect_Display )eglGetCurrentDisplay();
578 myGContext = (Aspect_RenderingContext )eglGetCurrentContext();
579 myWindow = (Aspect_Drawable )eglGetCurrentSurface(EGL_DRAW);
580 #elif defined(_WIN32)
581 myWindowDC = (Aspect_Handle )wglGetCurrentDC();
582 myGContext = (Aspect_RenderingContext )wglGetCurrentContext();
584 myDisplay = (Aspect_Display )glXGetCurrentDisplay();
585 myGContext = (Aspect_RenderingContext )glXGetCurrentContext();
586 myWindow = (Aspect_Drawable )glXGetCurrentDrawable();
588 if (myGContext == NULL)
590 return Standard_False;
594 myIsInitialized = Standard_True;
595 return Standard_True;
600 // =======================================================================
603 // =======================================================================
604 #if defined(HAVE_EGL)
605 Standard_Boolean OpenGl_Context::Init (const Aspect_Drawable theEglSurface,
606 const Aspect_Display theEglDisplay,
607 const Aspect_RenderingContext theEglContext)
608 #elif defined(_WIN32)
609 Standard_Boolean OpenGl_Context::Init (const Aspect_Handle theWindow,
610 const Aspect_Handle theWindowDC,
611 const Aspect_RenderingContext theGContext)
612 #elif defined(__APPLE__) && !defined(MACOSX_USE_GLX)
613 Standard_Boolean OpenGl_Context::Init (const void* theGContext)
615 Standard_Boolean OpenGl_Context::Init (const Aspect_Drawable theWindow,
616 const Aspect_Display theDisplay,
617 const Aspect_RenderingContext theGContext)
620 Standard_ProgramError_Raise_if (myIsInitialized, "OpenGl_Context::Init() should be called only once!");
621 #if defined(HAVE_EGL)
622 myWindow = theEglSurface;
623 myGContext = theEglContext;
624 myDisplay = theEglDisplay;
625 #elif defined(_WIN32)
626 myWindow = theWindow;
627 myGContext = theGContext;
628 myWindowDC = theWindowDC;
629 #elif defined(__APPLE__) && !defined(MACOSX_USE_GLX)
630 myGContext = (void* )theGContext;
632 myWindow = theWindow;
633 myGContext = theGContext;
634 myDisplay = theDisplay;
636 if (myGContext == NULL || !MakeCurrent())
638 return Standard_False;
642 myIsInitialized = Standard_True;
643 return Standard_True;
646 // =======================================================================
647 // function : ResetErrors
649 // =======================================================================
650 void OpenGl_Context::ResetErrors()
652 while (glGetError() != GL_NO_ERROR)
658 // =======================================================================
659 // function : readGlVersion
661 // =======================================================================
662 void OpenGl_Context::readGlVersion()
668 #ifdef GL_MAJOR_VERSION
669 // available since OpenGL 3.0 and OpenGL 3.0 ES
670 GLint aMajor = 0, aMinor = 0;
671 glGetIntegerv (GL_MAJOR_VERSION, &aMajor);
672 glGetIntegerv (GL_MINOR_VERSION, &aMinor);
673 // glGetError() sometimes does not report an error here even if
674 // GL does not know GL_MAJOR_VERSION and GL_MINOR_VERSION constants.
675 // This happens on some renderers like e.g. Cygwin MESA.
676 // Thus checking additionally if GL has put anything to
677 // the output variables.
678 if (glGetError() == GL_NO_ERROR && aMajor != 0 && aMinor != 0)
680 myGlVerMajor = aMajor;
681 myGlVerMinor = aMinor;
687 // Read version string.
688 // Notice that only first two numbers split by point '2.1 XXXXX' are significant.
689 // Following trash (after space) is vendor-specific.
690 // New drivers also returns micro version of GL like '3.3.0' which has no meaning
691 // and should be considered as vendor-specific too.
692 const char* aVerStr = (const char* )glGetString (GL_VERSION);
693 if (aVerStr == NULL || *aVerStr == '\0')
695 // invalid GL context
699 //#if defined(GL_ES_VERSION_2_0)
700 // skip "OpenGL ES-** " section
701 for (; *aVerStr != '\0'; ++aVerStr)
703 if (*aVerStr >= '0' && *aVerStr <= '9')
710 // parse string for major number
714 while (aVerStr[aMajIter] >= '0' && aVerStr[aMajIter] <= '9')
718 if (aMajIter == 0 || aMajIter >= sizeof(aMajorStr))
722 memcpy (aMajorStr, aVerStr, aMajIter);
723 aMajorStr[aMajIter] = '\0';
725 // parse string for minor number
726 aVerStr += aMajIter + 1;
728 while (aVerStr[aMinIter] >= '0' && aVerStr[aMinIter] <= '9')
732 if (aMinIter == 0 || aMinIter >= sizeof(aMinorStr))
736 memcpy (aMinorStr, aVerStr, aMinIter);
737 aMinorStr[aMinIter] = '\0';
740 myGlVerMajor = atoi (aMajorStr);
741 myGlVerMinor = atoi (aMinorStr);
743 if (myGlVerMajor <= 0)
750 static Standard_CString THE_DBGMSG_UNKNOWN = "UNKNOWN";
751 static Standard_CString THE_DBGMSG_SOURCES[] =
753 ".OpenGL", // GL_DEBUG_SOURCE_API_ARB
754 ".WinSystem", // GL_DEBUG_SOURCE_WINDOW_SYSTEM_ARB
755 ".GLSL", // GL_DEBUG_SOURCE_SHADER_COMPILER_ARB
756 ".3rdParty", // GL_DEBUG_SOURCE_THIRD_PARTY_ARB
757 "", // GL_DEBUG_SOURCE_APPLICATION_ARB
758 ".Other" // GL_DEBUG_SOURCE_OTHER_ARB
761 static Standard_CString THE_DBGMSG_TYPES[] =
763 "Error", // GL_DEBUG_TYPE_ERROR_ARB
764 "Deprecated", // GL_DEBUG_TYPE_DEPRECATED_BEHAVIOR_ARB
765 "Undef. behavior", // GL_DEBUG_TYPE_UNDEFINED_BEHAVIOR_ARB
766 "Portability", // GL_DEBUG_TYPE_PORTABILITY_ARB
767 "Performance", // GL_DEBUG_TYPE_PERFORMANCE_ARB
768 "Other" // GL_DEBUG_TYPE_OTHER_ARB
771 static Standard_CString THE_DBGMSG_SEV_HIGH = "High"; // GL_DEBUG_SEVERITY_HIGH_ARB
772 static Standard_CString THE_DBGMSG_SEV_MEDIUM = "Medium"; // GL_DEBUG_SEVERITY_MEDIUM_ARB
773 static Standard_CString THE_DBGMSG_SEV_LOW = "Low"; // GL_DEBUG_SEVERITY_LOW_ARB
775 #if !defined(GL_ES_VERSION_2_0)
776 //! Callback for GL_ARB_debug_output extension
777 static void APIENTRY debugCallbackWrap(unsigned int theSource,
778 unsigned int theType,
780 unsigned int theSeverity,
782 const char* theMessage,
783 const void* theUserParam)
785 OpenGl_Context* aCtx = (OpenGl_Context* )theUserParam;
786 aCtx->PushMessage (theSource, theType, theId, theSeverity, theMessage);
790 // =======================================================================
791 // function : PushMessage
793 // =======================================================================
794 void OpenGl_Context::PushMessage (const unsigned int theSource,
795 const unsigned int theType,
796 const unsigned int theId,
797 const unsigned int theSeverity,
798 const TCollection_ExtendedString& theMessage)
800 //OpenGl_Context* aCtx = (OpenGl_Context* )theUserParam;
801 Standard_CString& aSrc = (theSource >= GL_DEBUG_SOURCE_API_ARB
802 && theSource <= GL_DEBUG_SOURCE_OTHER_ARB)
803 ? THE_DBGMSG_SOURCES[theSource - GL_DEBUG_SOURCE_API_ARB]
804 : THE_DBGMSG_UNKNOWN;
805 Standard_CString& aType = (theType >= GL_DEBUG_TYPE_ERROR_ARB
806 && theType <= GL_DEBUG_TYPE_OTHER_ARB)
807 ? THE_DBGMSG_TYPES[theType - GL_DEBUG_TYPE_ERROR_ARB]
808 : THE_DBGMSG_UNKNOWN;
809 Standard_CString& aSev = theSeverity == GL_DEBUG_SEVERITY_HIGH_ARB
810 ? THE_DBGMSG_SEV_HIGH
811 : (theSeverity == GL_DEBUG_SEVERITY_MEDIUM_ARB
812 ? THE_DBGMSG_SEV_MEDIUM
813 : THE_DBGMSG_SEV_LOW);
814 Message_Gravity aGrav = theSeverity == GL_DEBUG_SEVERITY_HIGH_ARB
816 : (theSeverity == GL_DEBUG_SEVERITY_MEDIUM_ARB
820 TCollection_ExtendedString aMsg;
821 aMsg += "TKOpenGl"; aMsg += aSrc;
822 aMsg += " | Type: "; aMsg += aType;
823 aMsg += " | ID: "; aMsg += (Standard_Integer )theId;
824 aMsg += " | Severity: "; aMsg += aSev;
825 aMsg += " | Message:\n ";
827 Messenger()->Send (aMsg, aGrav);
830 // =======================================================================
833 // =======================================================================
834 void OpenGl_Context::init()
839 core11 = (OpenGl_GlCore11* )(&(*myFuncs));
840 core11fwd = (OpenGl_GlCore11Fwd* )(&(*myFuncs));
861 #if defined(GL_ES_VERSION_2_0)
863 hasTexRGBA8 = IsGlGreaterEqual (3, 0)
864 || CheckExtension ("GL_OES_rgb8_rgba8");
865 arbNPTW = IsGlGreaterEqual (3, 0)
866 || CheckExtension ("GL_OES_texture_npot");
867 arbTexRG = IsGlGreaterEqual (3, 0)
868 || CheckExtension ("GL_EXT_texture_rg");
869 extBgra = CheckExtension ("GL_EXT_texture_format_BGRA8888");
870 extAnis = CheckExtension ("GL_EXT_texture_filter_anisotropic");
871 extPDS = CheckExtension ("GL_OES_packed_depth_stencil");
873 core11fwd = (OpenGl_GlCore11Fwd* )(&(*myFuncs));
874 if (IsGlGreaterEqual (2, 0))
876 // enable compatible functions
877 core20 = (OpenGl_GlCore20* )(&(*myFuncs));
878 core20fwd = (OpenGl_GlCore20Fwd* )(&(*myFuncs));
879 core15fwd = (OpenGl_GlCore15Fwd* )(&(*myFuncs));
880 arbFBO = (OpenGl_ArbFBO* )(&(*myFuncs));
883 hasHighp = CheckExtension ("OES_fragment_precision_high");
884 GLint aRange[2] = {0, 0};
885 GLint aPrec [2] = {0, 0};
886 ::glGetShaderPrecisionFormat (GL_FRAGMENT_SHADER, GL_HIGH_FLOAT, aRange, aPrec);
889 hasHighp = Standard_True;
893 myTexClamp = IsGlGreaterEqual (1, 2) ? GL_CLAMP_TO_EDGE : GL_CLAMP;
895 hasTexRGBA8 = Standard_True;
896 arbNPTW = CheckExtension ("GL_ARB_texture_non_power_of_two");
897 extBgra = CheckExtension ("GL_EXT_bgra");
898 extAnis = CheckExtension ("GL_EXT_texture_filter_anisotropic");
899 extPDS = CheckExtension ("GL_EXT_packed_depth_stencil");
900 atiMem = CheckExtension ("GL_ATI_meminfo");
901 nvxMem = CheckExtension ("GL_NVX_gpu_memory_info");
903 GLint aStereo = GL_FALSE;
904 glGetIntegerv (GL_STEREO, &aStereo);
905 myIsStereoBuffers = aStereo == 1;
907 // get number of maximum clipping planes
908 glGetIntegerv (GL_MAX_CLIP_PLANES, &myMaxClipPlanes);
911 glGetIntegerv (GL_MAX_TEXTURE_SIZE, &myMaxTexDim);
915 glGetIntegerv (GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &myAnisoMax);
918 myClippingState.Init (myMaxClipPlanes);
920 #if !defined(GL_ES_VERSION_2_0)
938 //! Make record shorter to retrieve function pointer using variable with same name
939 #define FindProcShort(theFunc) FindProc(#theFunc, myFuncs->theFunc)
941 // retrieve platform-dependent extensions
942 #if defined(_WIN32) && !defined(HAVE_EGL)
943 if (FindProcShort (wglGetExtensionsStringARB))
945 const char* aWglExts = myFuncs->wglGetExtensionsStringARB (wglGetCurrentDC());
946 if (CheckExtension (aWglExts, "WGL_EXT_swap_control"))
948 FindProcShort (wglSwapIntervalEXT);
950 if (CheckExtension (aWglExts, "WGL_ARB_pixel_format"))
952 FindProcShort (wglChoosePixelFormatARB);
954 if (CheckExtension (aWglExts, "WGL_ARB_create_context_profile"))
956 FindProcShort (wglCreateContextAttribsARB);
958 if (CheckExtension (aWglExts, "WGL_NV_DX_interop"))
960 FindProcShort (wglDXSetResourceShareHandleNV);
961 FindProcShort (wglDXOpenDeviceNV);
962 FindProcShort (wglDXCloseDeviceNV);
963 FindProcShort (wglDXRegisterObjectNV);
964 FindProcShort (wglDXUnregisterObjectNV);
965 FindProcShort (wglDXObjectAccessNV);
966 FindProcShort (wglDXLockObjectsNV);
967 FindProcShort (wglDXUnlockObjectsNV);
972 // initialize debug context extension
973 if (CheckExtension ("GL_ARB_debug_output"))
976 if (FindProcShort (glDebugMessageControlARB)
977 && FindProcShort (glDebugMessageInsertARB)
978 && FindProcShort (glDebugMessageCallbackARB)
979 && FindProcShort (glGetDebugMessageLogARB))
981 arbDbg = (OpenGl_ArbDbg* )(&(*myFuncs));
984 && caps->contextDebug)
986 // setup default callback
987 arbDbg->glDebugMessageCallbackARB (debugCallbackWrap, this);
989 glEnable (GL_DEBUG_OUTPUT_SYNCHRONOUS_ARB);
994 // load OpenGL 1.2 new functions
995 has12 = IsGlGreaterEqual (1, 2)
996 && FindProcShort (glBlendColor)
997 && FindProcShort (glBlendEquation)
998 && FindProcShort (glDrawRangeElements)
999 && FindProcShort (glTexImage3D)
1000 && FindProcShort (glTexSubImage3D)
1001 && FindProcShort (glCopyTexSubImage3D);
1003 // load OpenGL 1.3 new functions
1004 has13 = IsGlGreaterEqual (1, 3)
1005 && FindProcShort (glActiveTexture)
1006 && FindProcShort (glSampleCoverage)
1007 && FindProcShort (glCompressedTexImage3D)
1008 && FindProcShort (glCompressedTexImage2D)
1009 && FindProcShort (glCompressedTexImage1D)
1010 && FindProcShort (glCompressedTexSubImage3D)
1011 && FindProcShort (glCompressedTexSubImage2D)
1012 && FindProcShort (glCompressedTexSubImage1D)
1013 && FindProcShort (glGetCompressedTexImage)
1014 && FindProcShort (glClientActiveTexture)
1015 && FindProcShort (glMultiTexCoord1d)
1016 && FindProcShort (glMultiTexCoord1dv)
1017 && FindProcShort (glMultiTexCoord1f)
1018 && FindProcShort (glMultiTexCoord1fv)
1019 && FindProcShort (glMultiTexCoord1i)
1020 && FindProcShort (glMultiTexCoord1iv)
1021 && FindProcShort (glMultiTexCoord1s)
1022 && FindProcShort (glMultiTexCoord1sv)
1023 && FindProcShort (glMultiTexCoord2d)
1024 && FindProcShort (glMultiTexCoord2dv)
1025 && FindProcShort (glMultiTexCoord2f)
1026 && FindProcShort (glMultiTexCoord2fv)
1027 && FindProcShort (glMultiTexCoord2i)
1028 && FindProcShort (glMultiTexCoord2iv)
1029 && FindProcShort (glMultiTexCoord2s)
1030 && FindProcShort (glMultiTexCoord2sv)
1031 && FindProcShort (glMultiTexCoord3d)
1032 && FindProcShort (glMultiTexCoord3dv)
1033 && FindProcShort (glMultiTexCoord3f)
1034 && FindProcShort (glMultiTexCoord3fv)
1035 && FindProcShort (glMultiTexCoord3i)
1036 && FindProcShort (glMultiTexCoord3iv)
1037 && FindProcShort (glMultiTexCoord3s)
1038 && FindProcShort (glMultiTexCoord3sv)
1039 && FindProcShort (glMultiTexCoord4d)
1040 && FindProcShort (glMultiTexCoord4dv)
1041 && FindProcShort (glMultiTexCoord4f)
1042 && FindProcShort (glMultiTexCoord4fv)
1043 && FindProcShort (glMultiTexCoord4i)
1044 && FindProcShort (glMultiTexCoord4iv)
1045 && FindProcShort (glMultiTexCoord4s)
1046 && FindProcShort (glMultiTexCoord4sv)
1047 && FindProcShort (glLoadTransposeMatrixf)
1048 && FindProcShort (glLoadTransposeMatrixd)
1049 && FindProcShort (glMultTransposeMatrixf)
1050 && FindProcShort (glMultTransposeMatrixd);
1052 // load OpenGL 1.4 new functions
1053 has14 = IsGlGreaterEqual (1, 4)
1054 && FindProcShort (glBlendFuncSeparate)
1055 && FindProcShort (glMultiDrawArrays)
1056 && FindProcShort (glMultiDrawElements)
1057 && FindProcShort (glPointParameterf)
1058 && FindProcShort (glPointParameterfv)
1059 && FindProcShort (glPointParameteri)
1060 && FindProcShort (glPointParameteriv);
1062 // load OpenGL 1.5 new functions
1063 has15 = IsGlGreaterEqual (1, 5)
1064 && FindProcShort (glGenQueries)
1065 && FindProcShort (glDeleteQueries)
1066 && FindProcShort (glIsQuery)
1067 && FindProcShort (glBeginQuery)
1068 && FindProcShort (glEndQuery)
1069 && FindProcShort (glGetQueryiv)
1070 && FindProcShort (glGetQueryObjectiv)
1071 && FindProcShort (glGetQueryObjectuiv)
1072 && FindProcShort (glBindBuffer)
1073 && FindProcShort (glDeleteBuffers)
1074 && FindProcShort (glGenBuffers)
1075 && FindProcShort (glIsBuffer)
1076 && FindProcShort (glBufferData)
1077 && FindProcShort (glBufferSubData)
1078 && FindProcShort (glGetBufferSubData)
1079 && FindProcShort (glMapBuffer)
1080 && FindProcShort (glUnmapBuffer)
1081 && FindProcShort (glGetBufferParameteriv)
1082 && FindProcShort (glGetBufferPointerv);
1084 // load OpenGL 2.0 new functions
1085 has20 = IsGlGreaterEqual (2, 0)
1086 && FindProcShort (glBlendEquationSeparate)
1087 && FindProcShort (glDrawBuffers)
1088 && FindProcShort (glStencilOpSeparate)
1089 && FindProcShort (glStencilFuncSeparate)
1090 && FindProcShort (glStencilMaskSeparate)
1091 && FindProcShort (glAttachShader)
1092 && FindProcShort (glBindAttribLocation)
1093 && FindProcShort (glCompileShader)
1094 && FindProcShort (glCreateProgram)
1095 && FindProcShort (glCreateShader)
1096 && FindProcShort (glDeleteProgram)
1097 && FindProcShort (glDeleteShader)
1098 && FindProcShort (glDetachShader)
1099 && FindProcShort (glDisableVertexAttribArray)
1100 && FindProcShort (glEnableVertexAttribArray)
1101 && FindProcShort (glGetActiveAttrib)
1102 && FindProcShort (glGetActiveUniform)
1103 && FindProcShort (glGetAttachedShaders)
1104 && FindProcShort (glGetAttribLocation)
1105 && FindProcShort (glGetProgramiv)
1106 && FindProcShort (glGetProgramInfoLog)
1107 && FindProcShort (glGetShaderiv)
1108 && FindProcShort (glGetShaderInfoLog)
1109 && FindProcShort (glGetShaderSource)
1110 && FindProcShort (glGetUniformLocation)
1111 && FindProcShort (glGetUniformfv)
1112 && FindProcShort (glGetUniformiv)
1113 && FindProcShort (glGetVertexAttribdv)
1114 && FindProcShort (glGetVertexAttribfv)
1115 && FindProcShort (glGetVertexAttribiv)
1116 && FindProcShort (glGetVertexAttribPointerv)
1117 && FindProcShort (glIsProgram)
1118 && FindProcShort (glIsShader)
1119 && FindProcShort (glLinkProgram)
1120 && FindProcShort (glShaderSource)
1121 && FindProcShort (glUseProgram)
1122 && FindProcShort (glUniform1f)
1123 && FindProcShort (glUniform2f)
1124 && FindProcShort (glUniform3f)
1125 && FindProcShort (glUniform4f)
1126 && FindProcShort (glUniform1i)
1127 && FindProcShort (glUniform2i)
1128 && FindProcShort (glUniform3i)
1129 && FindProcShort (glUniform4i)
1130 && FindProcShort (glUniform1fv)
1131 && FindProcShort (glUniform2fv)
1132 && FindProcShort (glUniform3fv)
1133 && FindProcShort (glUniform4fv)
1134 && FindProcShort (glUniform1iv)
1135 && FindProcShort (glUniform2iv)
1136 && FindProcShort (glUniform3iv)
1137 && FindProcShort (glUniform4iv)
1138 && FindProcShort (glUniformMatrix2fv)
1139 && FindProcShort (glUniformMatrix3fv)
1140 && FindProcShort (glUniformMatrix4fv)
1141 && FindProcShort (glValidateProgram)
1142 && FindProcShort (glVertexAttrib1d)
1143 && FindProcShort (glVertexAttrib1dv)
1144 && FindProcShort (glVertexAttrib1f)
1145 && FindProcShort (glVertexAttrib1fv)
1146 && FindProcShort (glVertexAttrib1s)
1147 && FindProcShort (glVertexAttrib1sv)
1148 && FindProcShort (glVertexAttrib2d)
1149 && FindProcShort (glVertexAttrib2dv)
1150 && FindProcShort (glVertexAttrib2f)
1151 && FindProcShort (glVertexAttrib2fv)
1152 && FindProcShort (glVertexAttrib2s)
1153 && FindProcShort (glVertexAttrib2sv)
1154 && FindProcShort (glVertexAttrib3d)
1155 && FindProcShort (glVertexAttrib3dv)
1156 && FindProcShort (glVertexAttrib3f)
1157 && FindProcShort (glVertexAttrib3fv)
1158 && FindProcShort (glVertexAttrib3s)
1159 && FindProcShort (glVertexAttrib3sv)
1160 && FindProcShort (glVertexAttrib4Nbv)
1161 && FindProcShort (glVertexAttrib4Niv)
1162 && FindProcShort (glVertexAttrib4Nsv)
1163 && FindProcShort (glVertexAttrib4Nub)
1164 && FindProcShort (glVertexAttrib4Nubv)
1165 && FindProcShort (glVertexAttrib4Nuiv)
1166 && FindProcShort (glVertexAttrib4Nusv)
1167 && FindProcShort (glVertexAttrib4bv)
1168 && FindProcShort (glVertexAttrib4d)
1169 && FindProcShort (glVertexAttrib4dv)
1170 && FindProcShort (glVertexAttrib4f)
1171 && FindProcShort (glVertexAttrib4fv)
1172 && FindProcShort (glVertexAttrib4iv)
1173 && FindProcShort (glVertexAttrib4s)
1174 && FindProcShort (glVertexAttrib4sv)
1175 && FindProcShort (glVertexAttrib4ubv)
1176 && FindProcShort (glVertexAttrib4uiv)
1177 && FindProcShort (glVertexAttrib4usv)
1178 && FindProcShort (glVertexAttribPointer);
1180 // load OpenGL 2.1 new functions
1181 has21 = IsGlGreaterEqual (2, 1)
1182 && FindProcShort (glUniformMatrix2x3fv)
1183 && FindProcShort (glUniformMatrix3x2fv)
1184 && FindProcShort (glUniformMatrix2x4fv)
1185 && FindProcShort (glUniformMatrix4x2fv)
1186 && FindProcShort (glUniformMatrix3x4fv)
1187 && FindProcShort (glUniformMatrix4x3fv);
1189 // load GL_ARB_framebuffer_object (added to OpenGL 3.0 core)
1190 const bool hasFBO = (IsGlGreaterEqual (3, 0) || CheckExtension ("GL_ARB_framebuffer_object"))
1191 && FindProcShort (glIsRenderbuffer)
1192 && FindProcShort (glBindRenderbuffer)
1193 && FindProcShort (glDeleteRenderbuffers)
1194 && FindProcShort (glGenRenderbuffers)
1195 && FindProcShort (glRenderbufferStorage)
1196 && FindProcShort (glGetRenderbufferParameteriv)
1197 && FindProcShort (glIsFramebuffer)
1198 && FindProcShort (glBindFramebuffer)
1199 && FindProcShort (glDeleteFramebuffers)
1200 && FindProcShort (glGenFramebuffers)
1201 && FindProcShort (glCheckFramebufferStatus)
1202 && FindProcShort (glFramebufferTexture1D)
1203 && FindProcShort (glFramebufferTexture2D)
1204 && FindProcShort (glFramebufferTexture3D)
1205 && FindProcShort (glFramebufferRenderbuffer)
1206 && FindProcShort (glGetFramebufferAttachmentParameteriv)
1207 && FindProcShort (glGenerateMipmap)
1208 && FindProcShort (glBlitFramebuffer)
1209 && FindProcShort (glRenderbufferStorageMultisample)
1210 && FindProcShort (glFramebufferTextureLayer);
1212 // load GL_ARB_vertex_array_object (added to OpenGL 3.0 core)
1213 const bool hasVAO = (IsGlGreaterEqual (3, 0) || CheckExtension ("GL_ARB_vertex_array_object"))
1214 && FindProcShort (glBindVertexArray)
1215 && FindProcShort (glDeleteVertexArrays)
1216 && FindProcShort (glGenVertexArrays)
1217 && FindProcShort (glIsVertexArray);
1219 // load GL_ARB_map_buffer_range (added to OpenGL 3.0 core)
1220 const bool hasMapBufferRange = (IsGlGreaterEqual (3, 0) || CheckExtension ("GL_ARB_map_buffer_range"))
1221 && FindProcShort (glMapBufferRange)
1222 && FindProcShort (glFlushMappedBufferRange);
1224 // load OpenGL 3.0 new functions
1225 has30 = IsGlGreaterEqual (3, 0)
1228 && hasMapBufferRange
1229 && FindProcShort (glColorMaski)
1230 && FindProcShort (glGetBooleani_v)
1231 && FindProcShort (glGetIntegeri_v)
1232 && FindProcShort (glEnablei)
1233 && FindProcShort (glDisablei)
1234 && FindProcShort (glIsEnabledi)
1235 && FindProcShort (glBeginTransformFeedback)
1236 && FindProcShort (glEndTransformFeedback)
1237 && FindProcShort (glBindBufferRange)
1238 && FindProcShort (glBindBufferBase)
1239 && FindProcShort (glTransformFeedbackVaryings)
1240 && FindProcShort (glGetTransformFeedbackVarying)
1241 && FindProcShort (glClampColor)
1242 && FindProcShort (glBeginConditionalRender)
1243 && FindProcShort (glEndConditionalRender)
1244 && FindProcShort (glVertexAttribIPointer)
1245 && FindProcShort (glGetVertexAttribIiv)
1246 && FindProcShort (glGetVertexAttribIuiv)
1247 && FindProcShort (glVertexAttribI1i)
1248 && FindProcShort (glVertexAttribI2i)
1249 && FindProcShort (glVertexAttribI3i)
1250 && FindProcShort (glVertexAttribI4i)
1251 && FindProcShort (glVertexAttribI1ui)
1252 && FindProcShort (glVertexAttribI2ui)
1253 && FindProcShort (glVertexAttribI3ui)
1254 && FindProcShort (glVertexAttribI4ui)
1255 && FindProcShort (glVertexAttribI1iv)
1256 && FindProcShort (glVertexAttribI2iv)
1257 && FindProcShort (glVertexAttribI3iv)
1258 && FindProcShort (glVertexAttribI4iv)
1259 && FindProcShort (glVertexAttribI1uiv)
1260 && FindProcShort (glVertexAttribI2uiv)
1261 && FindProcShort (glVertexAttribI3uiv)
1262 && FindProcShort (glVertexAttribI4uiv)
1263 && FindProcShort (glVertexAttribI4bv)
1264 && FindProcShort (glVertexAttribI4sv)
1265 && FindProcShort (glVertexAttribI4ubv)
1266 && FindProcShort (glVertexAttribI4usv)
1267 && FindProcShort (glGetUniformuiv)
1268 && FindProcShort (glBindFragDataLocation)
1269 && FindProcShort (glGetFragDataLocation)
1270 && FindProcShort (glUniform1ui)
1271 && FindProcShort (glUniform2ui)
1272 && FindProcShort (glUniform3ui)
1273 && FindProcShort (glUniform4ui)
1274 && FindProcShort (glUniform1uiv)
1275 && FindProcShort (glUniform2uiv)
1276 && FindProcShort (glUniform3uiv)
1277 && FindProcShort (glUniform4uiv)
1278 && FindProcShort (glTexParameterIiv)
1279 && FindProcShort (glTexParameterIuiv)
1280 && FindProcShort (glGetTexParameterIiv)
1281 && FindProcShort (glGetTexParameterIuiv)
1282 && FindProcShort (glClearBufferiv)
1283 && FindProcShort (glClearBufferuiv)
1284 && FindProcShort (glClearBufferfv)
1285 && FindProcShort (glClearBufferfi)
1286 && FindProcShort (glGetStringi);
1288 // load GL_ARB_uniform_buffer_object (added to OpenGL 3.1 core)
1289 const bool hasUBO = (IsGlGreaterEqual (3, 1) || CheckExtension ("GL_ARB_uniform_buffer_object"))
1290 && FindProcShort (glGetUniformIndices)
1291 && FindProcShort (glGetActiveUniformsiv)
1292 && FindProcShort (glGetActiveUniformName)
1293 && FindProcShort (glGetUniformBlockIndex)
1294 && FindProcShort (glGetActiveUniformBlockiv)
1295 && FindProcShort (glGetActiveUniformBlockName)
1296 && FindProcShort (glUniformBlockBinding);
1298 // load GL_ARB_copy_buffer (added to OpenGL 3.1 core)
1299 const bool hasCopyBufSubData = (IsGlGreaterEqual (3, 1) || CheckExtension ("GL_ARB_copy_buffer"))
1300 && FindProcShort (glCopyBufferSubData);
1304 // NPOT textures are required by OpenGL 2.0 specifications
1305 // but doesn't hardware accelerated by some ancient OpenGL 2.1 hardware (GeForce FX, RadeOn 9700 etc.)
1306 arbNPTW = Standard_True;
1307 arbTexRG = Standard_True;
1310 // load OpenGL 3.1 new functions
1311 has31 = IsGlGreaterEqual (3, 1)
1313 && hasCopyBufSubData
1314 && FindProcShort (glDrawArraysInstanced)
1315 && FindProcShort (glDrawElementsInstanced)
1316 && FindProcShort (glTexBuffer)
1317 && FindProcShort (glPrimitiveRestartIndex);
1319 // load GL_ARB_draw_elements_base_vertex (added to OpenGL 3.2 core)
1320 const bool hasDrawElemsBaseVert = (IsGlGreaterEqual (3, 2) || CheckExtension ("GL_ARB_draw_elements_base_vertex"))
1321 && FindProcShort (glDrawElementsBaseVertex)
1322 && FindProcShort (glDrawRangeElementsBaseVertex)
1323 && FindProcShort (glDrawElementsInstancedBaseVertex)
1324 && FindProcShort (glMultiDrawElementsBaseVertex);
1326 // load GL_ARB_provoking_vertex (added to OpenGL 3.2 core)
1327 const bool hasProvokingVert = (IsGlGreaterEqual (3, 2) || CheckExtension ("GL_ARB_provoking_vertex"))
1328 && FindProcShort (glProvokingVertex);
1330 // load GL_ARB_sync (added to OpenGL 3.2 core)
1331 const bool hasSync = (IsGlGreaterEqual (3, 2) || CheckExtension ("GL_ARB_sync"))
1332 && FindProcShort (glFenceSync)
1333 && FindProcShort (glIsSync)
1334 && FindProcShort (glDeleteSync)
1335 && FindProcShort (glClientWaitSync)
1336 && FindProcShort (glWaitSync)
1337 && FindProcShort (glGetInteger64v)
1338 && FindProcShort (glGetSynciv);
1340 // load GL_ARB_texture_multisample (added to OpenGL 3.2 core)
1341 const bool hasTextureMultisample = (IsGlGreaterEqual (3, 2) || CheckExtension ("GL_ARB_texture_multisample"))
1342 && FindProcShort (glTexImage2DMultisample)
1343 && FindProcShort (glTexImage3DMultisample)
1344 && FindProcShort (glGetMultisamplefv)
1345 && FindProcShort (glSampleMaski);
1347 // load OpenGL 3.2 new functions
1348 has32 = IsGlGreaterEqual (3, 2)
1349 && hasDrawElemsBaseVert
1352 && hasTextureMultisample
1353 && FindProcShort (glGetInteger64i_v)
1354 && FindProcShort (glGetBufferParameteri64v)
1355 && FindProcShort (glFramebufferTexture);
1357 // load GL_ARB_blend_func_extended (added to OpenGL 3.3 core)
1358 const bool hasBlendFuncExtended = (IsGlGreaterEqual (3, 3) || CheckExtension ("GL_ARB_blend_func_extended"))
1359 && FindProcShort (glBindFragDataLocationIndexed)
1360 && FindProcShort (glGetFragDataIndex);
1362 // load GL_ARB_sampler_objects (added to OpenGL 3.3 core)
1363 const bool hasSamplerObjects = (IsGlGreaterEqual (3, 3) || CheckExtension ("GL_ARB_sampler_objects"))
1364 && FindProcShort (glGenSamplers)
1365 && FindProcShort (glDeleteSamplers)
1366 && FindProcShort (glIsSampler)
1367 && FindProcShort (glBindSampler)
1368 && FindProcShort (glSamplerParameteri)
1369 && FindProcShort (glSamplerParameteriv)
1370 && FindProcShort (glSamplerParameterf)
1371 && FindProcShort (glSamplerParameterfv)
1372 && FindProcShort (glSamplerParameterIiv)
1373 && FindProcShort (glSamplerParameterIuiv)
1374 && FindProcShort (glGetSamplerParameteriv)
1375 && FindProcShort (glGetSamplerParameterIiv)
1376 && FindProcShort (glGetSamplerParameterfv)
1377 && FindProcShort (glGetSamplerParameterIuiv);
1379 // load GL_ARB_timer_query (added to OpenGL 3.3 core)
1380 const bool hasTimerQuery = (IsGlGreaterEqual (3, 3) || CheckExtension ("GL_ARB_timer_query"))
1381 && FindProcShort (glQueryCounter)
1382 && FindProcShort (glGetQueryObjecti64v)
1383 && FindProcShort (glGetQueryObjectui64v);
1385 // load GL_ARB_vertex_type_2_10_10_10_rev (added to OpenGL 3.3 core)
1386 const bool hasVertType21010101rev = (IsGlGreaterEqual (3, 3) || CheckExtension ("GL_ARB_vertex_type_2_10_10_10_rev"))
1387 && FindProcShort (glVertexP2ui)
1388 && FindProcShort (glVertexP2uiv)
1389 && FindProcShort (glVertexP3ui)
1390 && FindProcShort (glVertexP3uiv)
1391 && FindProcShort (glVertexP4ui)
1392 && FindProcShort (glVertexP4uiv)
1393 && FindProcShort (glTexCoordP1ui)
1394 && FindProcShort (glTexCoordP1uiv)
1395 && FindProcShort (glTexCoordP2ui)
1396 && FindProcShort (glTexCoordP2uiv)
1397 && FindProcShort (glTexCoordP3ui)
1398 && FindProcShort (glTexCoordP3uiv)
1399 && FindProcShort (glTexCoordP4ui)
1400 && FindProcShort (glTexCoordP4uiv)
1401 && FindProcShort (glMultiTexCoordP1ui)
1402 && FindProcShort (glMultiTexCoordP1uiv)
1403 && FindProcShort (glMultiTexCoordP2ui)
1404 && FindProcShort (glMultiTexCoordP2uiv)
1405 && FindProcShort (glMultiTexCoordP3ui)
1406 && FindProcShort (glMultiTexCoordP3uiv)
1407 && FindProcShort (glMultiTexCoordP4ui)
1408 && FindProcShort (glMultiTexCoordP4uiv)
1409 && FindProcShort (glNormalP3ui)
1410 && FindProcShort (glNormalP3uiv)
1411 && FindProcShort (glColorP3ui)
1412 && FindProcShort (glColorP3uiv)
1413 && FindProcShort (glColorP4ui)
1414 && FindProcShort (glColorP4uiv)
1415 && FindProcShort (glSecondaryColorP3ui)
1416 && FindProcShort (glSecondaryColorP3uiv)
1417 && FindProcShort (glVertexAttribP1ui)
1418 && FindProcShort (glVertexAttribP1uiv)
1419 && FindProcShort (glVertexAttribP2ui)
1420 && FindProcShort (glVertexAttribP2uiv)
1421 && FindProcShort (glVertexAttribP3ui)
1422 && FindProcShort (glVertexAttribP3uiv)
1423 && FindProcShort (glVertexAttribP4ui)
1424 && FindProcShort (glVertexAttribP4uiv);
1426 // load OpenGL 3.3 extra functions
1427 has33 = IsGlGreaterEqual (3, 3)
1428 && hasBlendFuncExtended
1429 && hasSamplerObjects
1431 && hasVertType21010101rev
1432 && FindProcShort (glVertexAttribDivisor);
1434 // load GL_ARB_draw_indirect (added to OpenGL 4.0 core)
1435 const bool hasDrawIndirect = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_draw_indirect"))
1436 && FindProcShort (glDrawArraysIndirect)
1437 && FindProcShort (glDrawElementsIndirect);
1439 // load GL_ARB_gpu_shader_fp64 (added to OpenGL 4.0 core)
1440 const bool hasShaderFP64 = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_gpu_shader_fp64"))
1441 && FindProcShort (glUniform1d)
1442 && FindProcShort (glUniform2d)
1443 && FindProcShort (glUniform3d)
1444 && FindProcShort (glUniform4d)
1445 && FindProcShort (glUniform1dv)
1446 && FindProcShort (glUniform2dv)
1447 && FindProcShort (glUniform3dv)
1448 && FindProcShort (glUniform4dv)
1449 && FindProcShort (glUniformMatrix2dv)
1450 && FindProcShort (glUniformMatrix3dv)
1451 && FindProcShort (glUniformMatrix4dv)
1452 && FindProcShort (glUniformMatrix2x3dv)
1453 && FindProcShort (glUniformMatrix2x4dv)
1454 && FindProcShort (glUniformMatrix3x2dv)
1455 && FindProcShort (glUniformMatrix3x4dv)
1456 && FindProcShort (glUniformMatrix4x2dv)
1457 && FindProcShort (glUniformMatrix4x3dv)
1458 && FindProcShort (glGetUniformdv);
1460 // load GL_ARB_shader_subroutine (added to OpenGL 4.0 core)
1461 const bool hasShaderSubroutine = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_shader_subroutine"))
1462 && FindProcShort (glGetSubroutineUniformLocation)
1463 && FindProcShort (glGetSubroutineIndex)
1464 && FindProcShort (glGetActiveSubroutineUniformiv)
1465 && FindProcShort (glGetActiveSubroutineUniformName)
1466 && FindProcShort (glGetActiveSubroutineName)
1467 && FindProcShort (glUniformSubroutinesuiv)
1468 && FindProcShort (glGetUniformSubroutineuiv)
1469 && FindProcShort (glGetProgramStageiv);
1471 // load GL_ARB_tessellation_shader (added to OpenGL 4.0 core)
1472 const bool hasTessellationShader = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_tessellation_shader"))
1473 && FindProcShort (glPatchParameteri)
1474 && FindProcShort (glPatchParameterfv);
1476 // load GL_ARB_transform_feedback2 (added to OpenGL 4.0 core)
1477 const bool hasTrsfFeedback2 = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_transform_feedback2"))
1478 && FindProcShort (glBindTransformFeedback)
1479 && FindProcShort (glDeleteTransformFeedbacks)
1480 && FindProcShort (glGenTransformFeedbacks)
1481 && FindProcShort (glIsTransformFeedback)
1482 && FindProcShort (glPauseTransformFeedback)
1483 && FindProcShort (glResumeTransformFeedback)
1484 && FindProcShort (glDrawTransformFeedback);
1486 // load GL_ARB_transform_feedback3 (added to OpenGL 4.0 core)
1487 const bool hasTrsfFeedback3 = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_transform_feedback3"))
1488 && FindProcShort (glDrawTransformFeedbackStream)
1489 && FindProcShort (glBeginQueryIndexed)
1490 && FindProcShort (glEndQueryIndexed)
1491 && FindProcShort (glGetQueryIndexediv);
1493 // load OpenGL 4.0 new functions
1494 has40 = IsGlGreaterEqual (4, 0)
1497 && hasShaderSubroutine
1498 && hasTessellationShader
1501 && FindProcShort (glMinSampleShading)
1502 && FindProcShort (glBlendEquationi)
1503 && FindProcShort (glBlendEquationSeparatei)
1504 && FindProcShort (glBlendFunci)
1505 && FindProcShort (glBlendFuncSeparatei);
1507 // load GL_ARB_ES2_compatibility (added to OpenGL 4.1 core)
1508 const bool hasES2Compatibility = (IsGlGreaterEqual (4, 1) || CheckExtension ("GL_ARB_ES2_compatibility"))
1509 && FindProcShort (glReleaseShaderCompiler)
1510 && FindProcShort (glShaderBinary)
1511 && FindProcShort (glGetShaderPrecisionFormat)
1512 && FindProcShort (glDepthRangef)
1513 && FindProcShort (glClearDepthf);
1515 // load GL_ARB_get_program_binary (added to OpenGL 4.1 core)
1516 const bool hasGetProgramBinary = (IsGlGreaterEqual (4, 1) || CheckExtension ("GL_ARB_get_program_binary"))
1517 && FindProcShort (glGetProgramBinary)
1518 && FindProcShort (glProgramBinary)
1519 && FindProcShort (glProgramParameteri);
1522 // load GL_ARB_separate_shader_objects (added to OpenGL 4.1 core)
1523 const bool hasSeparateShaderObjects = (IsGlGreaterEqual (4, 1) || CheckExtension ("GL_ARB_separate_shader_objects"))
1524 && FindProcShort (glUseProgramStages)
1525 && FindProcShort (glActiveShaderProgram)
1526 && FindProcShort (glCreateShaderProgramv)
1527 && FindProcShort (glBindProgramPipeline)
1528 && FindProcShort (glDeleteProgramPipelines)
1529 && FindProcShort (glGenProgramPipelines)
1530 && FindProcShort (glIsProgramPipeline)
1531 && FindProcShort (glGetProgramPipelineiv)
1532 && FindProcShort (glProgramUniform1i)
1533 && FindProcShort (glProgramUniform1iv)
1534 && FindProcShort (glProgramUniform1f)
1535 && FindProcShort (glProgramUniform1fv)
1536 && FindProcShort (glProgramUniform1d)
1537 && FindProcShort (glProgramUniform1dv)
1538 && FindProcShort (glProgramUniform1ui)
1539 && FindProcShort (glProgramUniform1uiv)
1540 && FindProcShort (glProgramUniform2i)
1541 && FindProcShort (glProgramUniform2iv)
1542 && FindProcShort (glProgramUniform2f)
1543 && FindProcShort (glProgramUniform2fv)
1544 && FindProcShort (glProgramUniform2d)
1545 && FindProcShort (glProgramUniform2dv)
1546 && FindProcShort (glProgramUniform2ui)
1547 && FindProcShort (glProgramUniform2uiv)
1548 && FindProcShort (glProgramUniform3i)
1549 && FindProcShort (glProgramUniform3iv)
1550 && FindProcShort (glProgramUniform3f)
1551 && FindProcShort (glProgramUniform3fv)
1552 && FindProcShort (glProgramUniform3d)
1553 && FindProcShort (glProgramUniform3dv)
1554 && FindProcShort (glProgramUniform3ui)
1555 && FindProcShort (glProgramUniform3uiv)
1556 && FindProcShort (glProgramUniform4i)
1557 && FindProcShort (glProgramUniform4iv)
1558 && FindProcShort (glProgramUniform4f)
1559 && FindProcShort (glProgramUniform4fv)
1560 && FindProcShort (glProgramUniform4d)
1561 && FindProcShort (glProgramUniform4dv)
1562 && FindProcShort (glProgramUniform4ui)
1563 && FindProcShort (glProgramUniform4uiv)
1564 && FindProcShort (glProgramUniformMatrix2fv)
1565 && FindProcShort (glProgramUniformMatrix3fv)
1566 && FindProcShort (glProgramUniformMatrix4fv)
1567 && FindProcShort (glProgramUniformMatrix2dv)
1568 && FindProcShort (glProgramUniformMatrix3dv)
1569 && FindProcShort (glProgramUniformMatrix4dv)
1570 && FindProcShort (glProgramUniformMatrix2x3fv)
1571 && FindProcShort (glProgramUniformMatrix3x2fv)
1572 && FindProcShort (glProgramUniformMatrix2x4fv)
1573 && FindProcShort (glProgramUniformMatrix4x2fv)
1574 && FindProcShort (glProgramUniformMatrix3x4fv)
1575 && FindProcShort (glProgramUniformMatrix4x3fv)
1576 && FindProcShort (glProgramUniformMatrix2x3dv)
1577 && FindProcShort (glProgramUniformMatrix3x2dv)
1578 && FindProcShort (glProgramUniformMatrix2x4dv)
1579 && FindProcShort (glProgramUniformMatrix4x2dv)
1580 && FindProcShort (glProgramUniformMatrix3x4dv)
1581 && FindProcShort (glProgramUniformMatrix4x3dv)
1582 && FindProcShort (glValidateProgramPipeline)
1583 && FindProcShort (glGetProgramPipelineInfoLog);
1585 // load GL_ARB_vertex_attrib_64bit (added to OpenGL 4.1 core)
1586 const bool hasVertAttrib64bit = (IsGlGreaterEqual (4, 1) || CheckExtension ("GL_ARB_vertex_attrib_64bit"))
1587 && FindProcShort (glVertexAttribL1d)
1588 && FindProcShort (glVertexAttribL2d)
1589 && FindProcShort (glVertexAttribL3d)
1590 && FindProcShort (glVertexAttribL4d)
1591 && FindProcShort (glVertexAttribL1dv)
1592 && FindProcShort (glVertexAttribL2dv)
1593 && FindProcShort (glVertexAttribL3dv)
1594 && FindProcShort (glVertexAttribL4dv)
1595 && FindProcShort (glVertexAttribLPointer)
1596 && FindProcShort (glGetVertexAttribLdv);
1598 // load GL_ARB_viewport_array (added to OpenGL 4.1 core)
1599 const bool hasViewportArray = (IsGlGreaterEqual (4, 1) || CheckExtension ("GL_ARB_viewport_array"))
1600 && FindProcShort (glViewportArrayv)
1601 && FindProcShort (glViewportIndexedf)
1602 && FindProcShort (glViewportIndexedfv)
1603 && FindProcShort (glScissorArrayv)
1604 && FindProcShort (glScissorIndexed)
1605 && FindProcShort (glScissorIndexedv)
1606 && FindProcShort (glDepthRangeArrayv)
1607 && FindProcShort (glDepthRangeIndexed)
1608 && FindProcShort (glGetFloati_v)
1609 && FindProcShort (glGetDoublei_v);
1611 has41 = IsGlGreaterEqual (4, 1)
1612 && hasES2Compatibility
1613 && hasGetProgramBinary
1614 && hasSeparateShaderObjects
1615 && hasVertAttrib64bit
1616 && hasViewportArray;
1618 // load GL_ARB_base_instance (added to OpenGL 4.2 core)
1619 const bool hasBaseInstance = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_base_instance"))
1620 && FindProcShort (glDrawArraysInstancedBaseInstance)
1621 && FindProcShort (glDrawElementsInstancedBaseInstance)
1622 && FindProcShort (glDrawElementsInstancedBaseVertexBaseInstance);
1624 // load GL_ARB_transform_feedback_instanced (added to OpenGL 4.2 core)
1625 const bool hasTrsfFeedbackInstanced = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_transform_feedback_instanced"))
1626 && FindProcShort (glDrawTransformFeedbackInstanced)
1627 && FindProcShort (glDrawTransformFeedbackStreamInstanced);
1629 // load GL_ARB_internalformat_query (added to OpenGL 4.2 core)
1630 const bool hasInternalFormatQuery = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_internalformat_query"))
1631 && FindProcShort (glGetInternalformativ);
1633 // load GL_ARB_shader_atomic_counters (added to OpenGL 4.2 core)
1634 const bool hasShaderAtomicCounters = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_shader_atomic_counters"))
1635 && FindProcShort (glGetActiveAtomicCounterBufferiv);
1637 // load GL_ARB_shader_image_load_store (added to OpenGL 4.2 core)
1638 const bool hasShaderImgLoadStore = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_shader_image_load_store"))
1639 && FindProcShort (glBindImageTexture)
1640 && FindProcShort (glMemoryBarrier);
1642 // load GL_ARB_texture_storage (added to OpenGL 4.2 core)
1643 const bool hasTextureStorage = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_texture_storage"))
1644 && FindProcShort (glTexStorage1D)
1645 && FindProcShort (glTexStorage2D)
1646 && FindProcShort (glTexStorage3D)
1647 && FindProcShort (glTextureStorage1DEXT)
1648 && FindProcShort (glTextureStorage2DEXT)
1649 && FindProcShort (glTextureStorage3DEXT);
1651 has42 = IsGlGreaterEqual (4, 2)
1653 && hasTrsfFeedbackInstanced
1654 && hasInternalFormatQuery
1655 && hasShaderAtomicCounters
1656 && hasShaderImgLoadStore
1657 && hasTextureStorage;
1659 has43 = IsGlGreaterEqual (4, 3)
1660 && FindProcShort (glClearBufferData)
1661 && FindProcShort (glClearBufferSubData)
1662 && FindProcShort (glDispatchCompute)
1663 && FindProcShort (glDispatchComputeIndirect)
1664 && FindProcShort (glCopyImageSubData)
1665 && FindProcShort (glFramebufferParameteri)
1666 && FindProcShort (glGetFramebufferParameteriv)
1667 && FindProcShort (glGetInternalformati64v)
1668 && FindProcShort (glInvalidateTexSubImage)
1669 && FindProcShort (glInvalidateTexImage)
1670 && FindProcShort (glInvalidateBufferSubData)
1671 && FindProcShort (glInvalidateBufferData)
1672 && FindProcShort (glInvalidateFramebuffer)
1673 && FindProcShort (glInvalidateSubFramebuffer)
1674 && FindProcShort (glMultiDrawArraysIndirect)
1675 && FindProcShort (glMultiDrawElementsIndirect)
1676 && FindProcShort (glGetProgramInterfaceiv)
1677 && FindProcShort (glGetProgramResourceIndex)
1678 && FindProcShort (glGetProgramResourceName)
1679 && FindProcShort (glGetProgramResourceiv)
1680 && FindProcShort (glGetProgramResourceLocation)
1681 && FindProcShort (glGetProgramResourceLocationIndex)
1682 && FindProcShort (glShaderStorageBlockBinding)
1683 && FindProcShort (glTexBufferRange)
1684 && FindProcShort (glTexStorage2DMultisample)
1685 && FindProcShort (glTexStorage3DMultisample)
1686 && FindProcShort (glTextureView)
1687 && FindProcShort (glBindVertexBuffer)
1688 && FindProcShort (glVertexAttribFormat)
1689 && FindProcShort (glVertexAttribIFormat)
1690 && FindProcShort (glVertexAttribLFormat)
1691 && FindProcShort (glVertexAttribBinding)
1692 && FindProcShort (glVertexBindingDivisor)
1693 && FindProcShort (glDebugMessageControl)
1694 && FindProcShort (glDebugMessageInsert)
1695 && FindProcShort (glDebugMessageCallback)
1696 && FindProcShort (glGetDebugMessageLog)
1697 && FindProcShort (glPushDebugGroup)
1698 && FindProcShort (glPopDebugGroup)
1699 && FindProcShort (glObjectLabel)
1700 && FindProcShort (glGetObjectLabel)
1701 && FindProcShort (glObjectPtrLabel)
1702 && FindProcShort (glGetObjectPtrLabel);
1704 // load GL_ARB_clear_texture (added to OpenGL 4.4 core)
1705 bool arbTexClear = (IsGlGreaterEqual (4, 4) || CheckExtension ("GL_ARB_clear_texture"))
1706 && FindProcShort (glClearTexImage)
1707 && FindProcShort (glClearTexSubImage);
1709 has44 = IsGlGreaterEqual (4, 4)
1711 && FindProcShort (glBufferStorage)
1712 && FindProcShort (glBindBuffersBase)
1713 && FindProcShort (glBindBuffersRange)
1714 && FindProcShort (glBindTextures)
1715 && FindProcShort (glBindSamplers)
1716 && FindProcShort (glBindImageTextures)
1717 && FindProcShort (glBindVertexBuffers);
1719 // initialize TBO extension (ARB)
1721 && CheckExtension ("GL_ARB_texture_buffer_object")
1722 && FindProc ("glTexBufferARB", myFuncs->glTexBuffer))
1724 arbTBO = (OpenGl_ArbTBO* )(&(*myFuncs));
1727 // initialize hardware instancing extension (ARB)
1729 && CheckExtension ("GL_ARB_draw_instanced")
1730 && FindProc ("glDrawArraysInstancedARB", myFuncs->glDrawArraysInstanced)
1731 && FindProc ("glDrawElementsInstancedARB", myFuncs->glDrawElementsInstanced))
1733 arbIns = (OpenGl_ArbIns* )(&(*myFuncs));
1736 // initialize FBO extension (ARB)
1739 arbFBO = (OpenGl_ArbFBO* )(&(*myFuncs));
1740 extPDS = Standard_True; // extension for EXT, but part of ARB
1743 // initialize GS extension (EXT)
1744 if (CheckExtension ("GL_EXT_geometry_shader4")
1745 && FindProcShort (glProgramParameteriEXT))
1747 extGS = (OpenGl_ExtGS* )(&(*myFuncs));
1774 core15 = (OpenGl_GlCore15* )(&(*myFuncs));
1775 core15fwd = (OpenGl_GlCore15Fwd* )(&(*myFuncs));
1784 core20 = (OpenGl_GlCore20* )(&(*myFuncs));
1785 core20fwd = (OpenGl_GlCore20Fwd* )(&(*myFuncs));
1807 arbTBO = (OpenGl_ArbTBO* )(&(*myFuncs));
1808 arbIns = (OpenGl_ArbIns* )(&(*myFuncs));
1816 core32 = (OpenGl_GlCore32* )(&(*myFuncs));
1817 core32back = (OpenGl_GlCore32Back* )(&(*myFuncs));
1839 core41 = (OpenGl_GlCore41* )(&(*myFuncs));
1840 core41back = (OpenGl_GlCore41Back* )(&(*myFuncs));
1848 core42 = (OpenGl_GlCore42* )(&(*myFuncs));
1849 core42back = (OpenGl_GlCore42Back* )(&(*myFuncs));
1857 core43 = (OpenGl_GlCore43* )(&(*myFuncs));
1858 core43back = (OpenGl_GlCore43Back* )(&(*myFuncs));
1866 core44 = (OpenGl_GlCore44* )(&(*myFuncs));
1867 core44back = (OpenGl_GlCore44Back* )(&(*myFuncs));
1871 // =======================================================================
1872 // function : MemoryInfo
1874 // =======================================================================
1875 Standard_Size OpenGl_Context::AvailableMemory() const
1877 #if !defined(GL_ES_VERSION_2_0)
1880 // this is actually information for VBO pool
1881 // however because pools are mostly shared
1882 // it can be used for total GPU memory estimations
1885 glGetIntegerv (GL_VBO_FREE_MEMORY_ATI, aMemInfo);
1886 // returned value is in KiB, however this maybe changed in future
1887 return Standard_Size(aMemInfo[0]) * 1024;
1891 // current available dedicated video memory (in KiB), currently unused GPU memory
1893 glGetIntegerv (GL_GPU_MEMORY_INFO_CURRENT_AVAILABLE_VIDMEM_NVX, &aMemInfo);
1894 return Standard_Size(aMemInfo) * 1024;
1900 // =======================================================================
1901 // function : MemoryInfo
1903 // =======================================================================
1904 TCollection_AsciiString OpenGl_Context::MemoryInfo() const
1906 TCollection_AsciiString anInfo;
1907 #if !defined(GL_ES_VERSION_2_0)
1911 memset (aValues, 0, sizeof(aValues));
1912 glGetIntegerv (GL_VBO_FREE_MEMORY_ATI, aValues);
1914 // total memory free in the pool
1915 anInfo += TCollection_AsciiString (" GPU free memory: ") + (aValues[0] / 1024) + " MiB\n";
1917 // largest available free block in the pool
1918 anInfo += TCollection_AsciiString (" Largest free block: ") + (aValues[1] / 1024) + " MiB\n";
1919 if (aValues[2] != aValues[0])
1921 // total auxiliary memory free
1922 anInfo += TCollection_AsciiString (" Free memory: ") + (aValues[2] / 1024) + " MiB\n";
1927 //current available dedicated video memory (in KiB), currently unused GPU memory
1929 glGetIntegerv (GL_GPU_MEMORY_INFO_CURRENT_AVAILABLE_VIDMEM_NVX, &aValue);
1930 anInfo += TCollection_AsciiString (" GPU free memory: ") + (aValue / 1024) + " MiB\n";
1932 // dedicated video memory, total size (in KiB) of the GPU memory
1933 GLint aDedicated = 0;
1934 glGetIntegerv (GL_GPU_MEMORY_INFO_DEDICATED_VIDMEM_NVX, &aDedicated);
1935 anInfo += TCollection_AsciiString (" GPU memory: ") + (aDedicated / 1024) + " MiB\n";
1937 // total available memory, total size (in KiB) of the memory available for allocations
1938 glGetIntegerv (GL_GPU_MEMORY_INFO_TOTAL_AVAILABLE_MEMORY_NVX, &aValue);
1939 if (aValue != aDedicated)
1941 // different only for special configurations
1942 anInfo += TCollection_AsciiString (" Total memory: ") + (aValue / 1024) + " MiB\n";
1950 // =======================================================================
1951 // function : GetResource
1953 // =======================================================================
1954 const Handle(OpenGl_Resource)& OpenGl_Context::GetResource (const TCollection_AsciiString& theKey) const
1956 return mySharedResources->IsBound (theKey) ? mySharedResources->Find (theKey) : NULL_GL_RESOURCE;
1959 // =======================================================================
1960 // function : ShareResource
1962 // =======================================================================
1963 Standard_Boolean OpenGl_Context::ShareResource (const TCollection_AsciiString& theKey,
1964 const Handle(OpenGl_Resource)& theResource)
1966 if (theKey.IsEmpty() || theResource.IsNull())
1968 return Standard_False;
1970 return mySharedResources->Bind (theKey, theResource);
1973 // =======================================================================
1974 // function : ReleaseResource
1976 // =======================================================================
1977 void OpenGl_Context::ReleaseResource (const TCollection_AsciiString& theKey,
1978 const Standard_Boolean theToDelay)
1980 if (!mySharedResources->IsBound (theKey))
1984 const Handle(OpenGl_Resource)& aRes = mySharedResources->Find (theKey);
1985 if (aRes->GetRefCount() > 1)
1992 myDelayed->Bind (theKey, 1);
1996 aRes->Release (this);
1997 mySharedResources->UnBind (theKey);
2001 // =======================================================================
2002 // function : DelayedRelease
2004 // =======================================================================
2005 void OpenGl_Context::DelayedRelease (Handle(OpenGl_Resource)& theResource)
2007 myUnusedResources->Prepend (theResource);
2008 theResource.Nullify();
2011 // =======================================================================
2012 // function : ReleaseDelayed
2014 // =======================================================================
2015 void OpenGl_Context::ReleaseDelayed()
2017 // release queued elements
2018 while (!myUnusedResources->IsEmpty())
2020 myUnusedResources->First()->Release (this);
2021 myUnusedResources->RemoveFirst();
2024 // release delayed shared resources
2025 NCollection_Vector<TCollection_AsciiString> aDeadList;
2026 for (NCollection_DataMap<TCollection_AsciiString, Standard_Integer>::Iterator anIter (*myDelayed);
2027 anIter.More(); anIter.Next())
2029 if (++anIter.ChangeValue() <= 2)
2031 continue; // postpone release one more frame to ensure noone use it periodically
2034 const TCollection_AsciiString& aKey = anIter.Key();
2035 if (!mySharedResources->IsBound (aKey))
2037 // mixed unshared strategy delayed/undelayed was used!
2038 aDeadList.Append (aKey);
2042 Handle(OpenGl_Resource)& aRes = mySharedResources->ChangeFind (aKey);
2043 if (aRes->GetRefCount() > 1)
2045 // should be only 1 instance in mySharedResources
2046 // if not - resource was reused again
2047 aDeadList.Append (aKey);
2051 // release resource if no one requiested it more than 2 redraw calls
2052 aRes->Release (this);
2053 mySharedResources->UnBind (aKey);
2054 aDeadList.Append (aKey);
2057 for (Standard_Integer anIter = 0; anIter < aDeadList.Length(); ++anIter)
2059 myDelayed->UnBind (aDeadList.Value (anIter));
2063 // =======================================================================
2064 // function : BindProgram
2066 // =======================================================================
2067 Standard_Boolean OpenGl_Context::BindProgram (const Handle(OpenGl_ShaderProgram)& theProgram)
2069 if (core20fwd == NULL)
2071 return Standard_False;
2074 if (theProgram.IsNull()
2075 || !theProgram->IsValid())
2077 if (!myActiveProgram.IsNull())
2079 core20fwd->glUseProgram (OpenGl_ShaderProgram::NO_PROGRAM);
2080 myActiveProgram.Nullify();
2082 return Standard_False;
2085 myActiveProgram = theProgram;
2086 core20fwd->glUseProgram (theProgram->ProgramId());
2087 return Standard_True;
2090 // =======================================================================
2091 // function : SetColor4fv
2093 // =======================================================================
2094 void OpenGl_Context::SetColor4fv (const OpenGl_Vec4& theColor)
2096 if (!myActiveProgram.IsNull())
2098 myActiveProgram->SetUniform (this, myActiveProgram->GetStateLocation (OpenGl_OCCT_COLOR), theColor);
2100 #if !defined(GL_ES_VERSION_2_0)
2101 else if (core11 != NULL)
2103 core11->glColor4fv (theColor.GetData());
2108 // =======================================================================
2109 // function : SetPointSize
2111 // =======================================================================
2112 void OpenGl_Context::SetPointSize (const Standard_ShortReal theSize)
2114 if (!myActiveProgram.IsNull())
2116 myActiveProgram->SetUniform (this, myActiveProgram->GetStateLocation (OpenGl_OCCT_POINT_SIZE), theSize);
2117 #if !defined(GL_ES_VERSION_2_0)
2118 //myContext->core11fwd->glEnable (GL_VERTEX_PROGRAM_POINT_SIZE);
2121 #if !defined(GL_ES_VERSION_2_0)
2124 core11fwd->glPointSize (theSize);
2125 if (core20fwd != NULL)
2127 //myContext->core11fwd->glDisable (GL_VERTEX_PROGRAM_POINT_SIZE);
2133 // =======================================================================
2134 // function : SetGlNormalizeEnabled
2136 // =======================================================================
2137 Standard_Boolean OpenGl_Context::SetGlNormalizeEnabled (Standard_Boolean isEnabled)
2139 if (isEnabled == myIsGlNormalizeEnabled)
2141 return myIsGlNormalizeEnabled;
2144 Standard_Boolean anOldGlNormalize = myIsGlNormalizeEnabled;
2146 myIsGlNormalizeEnabled = isEnabled;
2148 #if !defined(GL_ES_VERSION_2_0)
2151 glEnable (GL_NORMALIZE);
2155 glDisable (GL_NORMALIZE);
2159 return anOldGlNormalize;