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)
500 std::cerr << "CheckExtension called with NULL string!\n";
501 return Standard_False;
504 // available since OpenGL 3.0
505 // and the ONLY way to check extensions with OpenGL 3.1+ core profile
506 /**if (IsGlGreaterEqual (3, 0))
509 glGetIntegerv (GL_NUM_EXTENSIONS, &anExtNb);
510 for (GLint anIter = 0; anIter < anExtNb; ++anIter)
512 const char* anExtension = (const char* )core30->glGetStringi (GL_EXTENSIONS, (GLuint )anIter);
513 if (anExtension[anExtNameLen] == '\0' &&
514 strncmp (anExtension, theExtName, anExtNameLen) == 0)
516 return Standard_True;
519 return Standard_False;
522 // use old way with huge string for all extensions
523 const char* anExtString = (const char* )glGetString (GL_EXTENSIONS);
524 if (anExtString == NULL)
526 Messenger()->Send ("TKOpenGL: glGetString (GL_EXTENSIONS) has returned NULL! No GL context?", Message_Warning);
527 return Standard_False;
529 return CheckExtension (anExtString, theExtName);
532 // =======================================================================
533 // function : CheckExtension
535 // =======================================================================
536 Standard_Boolean OpenGl_Context::CheckExtension (const char* theExtString,
537 const char* theExtName)
539 if (theExtString == NULL)
541 return Standard_False;
544 // Search for theExtName in the extensions string.
545 // Use of strstr() is not sufficient because extension names can be prefixes of other extension names.
546 char* aPtrIter = (char* )theExtString;
547 const char* aPtrEnd = aPtrIter + strlen (theExtString);
548 const size_t anExtNameLen = strlen (theExtName);
549 while (aPtrIter < aPtrEnd)
551 const size_t n = strcspn (aPtrIter, " ");
552 if ((n == anExtNameLen) && (strncmp (aPtrIter, theExtName, anExtNameLen) == 0))
554 return Standard_True;
558 return Standard_False;
561 #if !defined(__APPLE__) || defined(MACOSX_USE_GLX)
563 // =======================================================================
566 // =======================================================================
567 Standard_Boolean OpenGl_Context::Init()
571 return Standard_True;
574 #if defined(HAVE_EGL)
575 myDisplay = (Aspect_Display )eglGetCurrentDisplay();
576 myGContext = (Aspect_RenderingContext )eglGetCurrentContext();
577 myWindow = (Aspect_Drawable )eglGetCurrentSurface(EGL_DRAW);
578 #elif defined(_WIN32)
579 myWindowDC = (Aspect_Handle )wglGetCurrentDC();
580 myGContext = (Aspect_RenderingContext )wglGetCurrentContext();
582 myDisplay = (Aspect_Display )glXGetCurrentDisplay();
583 myGContext = (Aspect_RenderingContext )glXGetCurrentContext();
584 myWindow = (Aspect_Drawable )glXGetCurrentDrawable();
586 if (myGContext == NULL)
588 return Standard_False;
592 myIsInitialized = Standard_True;
593 return Standard_True;
598 // =======================================================================
601 // =======================================================================
602 #if defined(HAVE_EGL)
603 Standard_Boolean OpenGl_Context::Init (const Aspect_Drawable theEglSurface,
604 const Aspect_Display theEglDisplay,
605 const Aspect_RenderingContext theEglContext)
606 #elif defined(_WIN32)
607 Standard_Boolean OpenGl_Context::Init (const Aspect_Handle theWindow,
608 const Aspect_Handle theWindowDC,
609 const Aspect_RenderingContext theGContext)
610 #elif defined(__APPLE__) && !defined(MACOSX_USE_GLX)
611 Standard_Boolean OpenGl_Context::Init (const void* theGContext)
613 Standard_Boolean OpenGl_Context::Init (const Aspect_Drawable theWindow,
614 const Aspect_Display theDisplay,
615 const Aspect_RenderingContext theGContext)
618 Standard_ProgramError_Raise_if (myIsInitialized, "OpenGl_Context::Init() should be called only once!");
619 #if defined(HAVE_EGL)
620 myWindow = theEglSurface;
621 myGContext = theEglContext;
622 myDisplay = theEglDisplay;
623 #elif defined(_WIN32)
624 myWindow = theWindow;
625 myGContext = theGContext;
626 myWindowDC = theWindowDC;
627 #elif defined(__APPLE__) && !defined(MACOSX_USE_GLX)
628 myGContext = (void* )theGContext;
630 myWindow = theWindow;
631 myGContext = theGContext;
632 myDisplay = theDisplay;
634 if (myGContext == NULL || !MakeCurrent())
636 return Standard_False;
640 myIsInitialized = Standard_True;
641 return Standard_True;
644 // =======================================================================
645 // function : ResetErrors
647 // =======================================================================
648 void OpenGl_Context::ResetErrors()
650 while (glGetError() != GL_NO_ERROR)
656 // =======================================================================
657 // function : readGlVersion
659 // =======================================================================
660 void OpenGl_Context::readGlVersion()
666 #ifdef GL_MAJOR_VERSION
667 // available since OpenGL 3.0 and OpenGL 3.0 ES
668 GLint aMajor = 0, aMinor = 0;
669 glGetIntegerv (GL_MAJOR_VERSION, &aMajor);
670 glGetIntegerv (GL_MINOR_VERSION, &aMinor);
671 // glGetError() sometimes does not report an error here even if
672 // GL does not know GL_MAJOR_VERSION and GL_MINOR_VERSION constants.
673 // This happens on some renderers like e.g. Cygwin MESA.
674 // Thus checking additionally if GL has put anything to
675 // the output variables.
676 if (glGetError() == GL_NO_ERROR && aMajor != 0 && aMinor != 0)
678 myGlVerMajor = aMajor;
679 myGlVerMinor = aMinor;
685 // Read version string.
686 // Notice that only first two numbers split by point '2.1 XXXXX' are significant.
687 // Following trash (after space) is vendor-specific.
688 // New drivers also returns micro version of GL like '3.3.0' which has no meaning
689 // and should be considered as vendor-specific too.
690 const char* aVerStr = (const char* )glGetString (GL_VERSION);
691 if (aVerStr == NULL || *aVerStr == '\0')
693 // invalid GL context
697 //#if defined(GL_ES_VERSION_2_0)
698 // skip "OpenGL ES-** " section
699 for (; *aVerStr != '\0'; ++aVerStr)
701 if (*aVerStr >= '0' && *aVerStr <= '9')
708 // parse string for major number
712 while (aVerStr[aMajIter] >= '0' && aVerStr[aMajIter] <= '9')
716 if (aMajIter == 0 || aMajIter >= sizeof(aMajorStr))
720 memcpy (aMajorStr, aVerStr, aMajIter);
721 aMajorStr[aMajIter] = '\0';
723 // parse string for minor number
724 aVerStr += aMajIter + 1;
726 while (aVerStr[aMinIter] >= '0' && aVerStr[aMinIter] <= '9')
730 if (aMinIter == 0 || aMinIter >= sizeof(aMinorStr))
734 memcpy (aMinorStr, aVerStr, aMinIter);
735 aMinorStr[aMinIter] = '\0';
738 myGlVerMajor = atoi (aMajorStr);
739 myGlVerMinor = atoi (aMinorStr);
741 if (myGlVerMajor <= 0)
748 static Standard_CString THE_DBGMSG_UNKNOWN = "UNKNOWN";
749 static Standard_CString THE_DBGMSG_SOURCES[] =
751 ".OpenGL", // GL_DEBUG_SOURCE_API_ARB
752 ".WinSystem", // GL_DEBUG_SOURCE_WINDOW_SYSTEM_ARB
753 ".GLSL", // GL_DEBUG_SOURCE_SHADER_COMPILER_ARB
754 ".3rdParty", // GL_DEBUG_SOURCE_THIRD_PARTY_ARB
755 "", // GL_DEBUG_SOURCE_APPLICATION_ARB
756 ".Other" // GL_DEBUG_SOURCE_OTHER_ARB
759 static Standard_CString THE_DBGMSG_TYPES[] =
761 "Error", // GL_DEBUG_TYPE_ERROR_ARB
762 "Deprecated", // GL_DEBUG_TYPE_DEPRECATED_BEHAVIOR_ARB
763 "Undef. behavior", // GL_DEBUG_TYPE_UNDEFINED_BEHAVIOR_ARB
764 "Portability", // GL_DEBUG_TYPE_PORTABILITY_ARB
765 "Performance", // GL_DEBUG_TYPE_PERFORMANCE_ARB
766 "Other" // GL_DEBUG_TYPE_OTHER_ARB
769 static Standard_CString THE_DBGMSG_SEV_HIGH = "High"; // GL_DEBUG_SEVERITY_HIGH_ARB
770 static Standard_CString THE_DBGMSG_SEV_MEDIUM = "Medium"; // GL_DEBUG_SEVERITY_MEDIUM_ARB
771 static Standard_CString THE_DBGMSG_SEV_LOW = "Low"; // GL_DEBUG_SEVERITY_LOW_ARB
773 #if !defined(GL_ES_VERSION_2_0)
774 //! Callback for GL_ARB_debug_output extension
775 static void APIENTRY debugCallbackWrap(unsigned int theSource,
776 unsigned int theType,
778 unsigned int theSeverity,
780 const char* theMessage,
781 const void* theUserParam)
783 OpenGl_Context* aCtx = (OpenGl_Context* )theUserParam;
784 aCtx->PushMessage (theSource, theType, theId, theSeverity, theMessage);
788 // =======================================================================
789 // function : PushMessage
791 // =======================================================================
792 void OpenGl_Context::PushMessage (const unsigned int theSource,
793 const unsigned int theType,
794 const unsigned int theId,
795 const unsigned int theSeverity,
796 const TCollection_ExtendedString& theMessage)
798 //OpenGl_Context* aCtx = (OpenGl_Context* )theUserParam;
799 Standard_CString& aSrc = (theSource >= GL_DEBUG_SOURCE_API_ARB
800 && theSource <= GL_DEBUG_SOURCE_OTHER_ARB)
801 ? THE_DBGMSG_SOURCES[theSource - GL_DEBUG_SOURCE_API_ARB]
802 : THE_DBGMSG_UNKNOWN;
803 Standard_CString& aType = (theType >= GL_DEBUG_TYPE_ERROR_ARB
804 && theType <= GL_DEBUG_TYPE_OTHER_ARB)
805 ? THE_DBGMSG_TYPES[theType - GL_DEBUG_TYPE_ERROR_ARB]
806 : THE_DBGMSG_UNKNOWN;
807 Standard_CString& aSev = theSeverity == GL_DEBUG_SEVERITY_HIGH_ARB
808 ? THE_DBGMSG_SEV_HIGH
809 : (theSeverity == GL_DEBUG_SEVERITY_MEDIUM_ARB
810 ? THE_DBGMSG_SEV_MEDIUM
811 : THE_DBGMSG_SEV_LOW);
812 Message_Gravity aGrav = theSeverity == GL_DEBUG_SEVERITY_HIGH_ARB
814 : (theSeverity == GL_DEBUG_SEVERITY_MEDIUM_ARB
818 TCollection_ExtendedString aMsg;
819 aMsg += "TKOpenGl"; aMsg += aSrc;
820 aMsg += " | Type: "; aMsg += aType;
821 aMsg += " | ID: "; aMsg += (Standard_Integer )theId;
822 aMsg += " | Severity: "; aMsg += aSev;
823 aMsg += " | Message:\n ";
825 Messenger()->Send (aMsg, aGrav);
828 // =======================================================================
831 // =======================================================================
832 void OpenGl_Context::init()
837 core11 = (OpenGl_GlCore11* )(&(*myFuncs));
838 core11fwd = (OpenGl_GlCore11Fwd* )(&(*myFuncs));
859 #if defined(GL_ES_VERSION_2_0)
861 hasTexRGBA8 = IsGlGreaterEqual (3, 0)
862 || CheckExtension ("GL_OES_rgb8_rgba8");
863 arbNPTW = IsGlGreaterEqual (3, 0)
864 || CheckExtension ("GL_OES_texture_npot");
865 arbTexRG = IsGlGreaterEqual (3, 0)
866 || CheckExtension ("GL_EXT_texture_rg");
867 extBgra = CheckExtension ("GL_EXT_texture_format_BGRA8888");
868 extAnis = CheckExtension ("GL_EXT_texture_filter_anisotropic");
869 extPDS = CheckExtension ("GL_OES_packed_depth_stencil");
871 core11fwd = (OpenGl_GlCore11Fwd* )(&(*myFuncs));
872 if (IsGlGreaterEqual (2, 0))
874 // enable compatible functions
875 core20 = (OpenGl_GlCore20* )(&(*myFuncs));
876 core20fwd = (OpenGl_GlCore20Fwd* )(&(*myFuncs));
877 core15fwd = (OpenGl_GlCore15Fwd* )(&(*myFuncs));
878 arbFBO = (OpenGl_ArbFBO* )(&(*myFuncs));
881 hasHighp = CheckExtension ("OES_fragment_precision_high");
882 GLint aRange[2] = {0, 0};
883 GLint aPrec [2] = {0, 0};
884 ::glGetShaderPrecisionFormat (GL_FRAGMENT_SHADER, GL_HIGH_FLOAT, aRange, aPrec);
887 hasHighp = Standard_True;
891 myTexClamp = IsGlGreaterEqual (1, 2) ? GL_CLAMP_TO_EDGE : GL_CLAMP;
893 hasTexRGBA8 = Standard_True;
894 arbNPTW = CheckExtension ("GL_ARB_texture_non_power_of_two");
895 extBgra = CheckExtension ("GL_EXT_bgra");
896 extAnis = CheckExtension ("GL_EXT_texture_filter_anisotropic");
897 extPDS = CheckExtension ("GL_EXT_packed_depth_stencil");
898 atiMem = CheckExtension ("GL_ATI_meminfo");
899 nvxMem = CheckExtension ("GL_NVX_gpu_memory_info");
901 GLint aStereo = GL_FALSE;
902 glGetIntegerv (GL_STEREO, &aStereo);
903 myIsStereoBuffers = aStereo == 1;
905 // get number of maximum clipping planes
906 glGetIntegerv (GL_MAX_CLIP_PLANES, &myMaxClipPlanes);
909 glGetIntegerv (GL_MAX_TEXTURE_SIZE, &myMaxTexDim);
913 glGetIntegerv (GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &myAnisoMax);
916 myClippingState.Init (myMaxClipPlanes);
918 #if !defined(GL_ES_VERSION_2_0)
936 //! Make record shorter to retrieve function pointer using variable with same name
937 #define FindProcShort(theFunc) FindProc(#theFunc, myFuncs->theFunc)
939 // retrieve platform-dependent extensions
940 #if defined(_WIN32) && !defined(HAVE_EGL)
941 if (FindProcShort (wglGetExtensionsStringARB))
943 const char* aWglExts = myFuncs->wglGetExtensionsStringARB (wglGetCurrentDC());
944 if (CheckExtension (aWglExts, "WGL_EXT_swap_control"))
946 FindProcShort (wglSwapIntervalEXT);
948 if (CheckExtension (aWglExts, "WGL_ARB_pixel_format"))
950 FindProcShort (wglChoosePixelFormatARB);
952 if (CheckExtension (aWglExts, "WGL_ARB_create_context_profile"))
954 FindProcShort (wglCreateContextAttribsARB);
956 if (CheckExtension (aWglExts, "WGL_NV_DX_interop"))
958 FindProcShort (wglDXSetResourceShareHandleNV);
959 FindProcShort (wglDXOpenDeviceNV);
960 FindProcShort (wglDXCloseDeviceNV);
961 FindProcShort (wglDXRegisterObjectNV);
962 FindProcShort (wglDXUnregisterObjectNV);
963 FindProcShort (wglDXObjectAccessNV);
964 FindProcShort (wglDXLockObjectsNV);
965 FindProcShort (wglDXUnlockObjectsNV);
970 // initialize debug context extension
971 if (CheckExtension ("GL_ARB_debug_output"))
974 if (FindProcShort (glDebugMessageControlARB)
975 && FindProcShort (glDebugMessageInsertARB)
976 && FindProcShort (glDebugMessageCallbackARB)
977 && FindProcShort (glGetDebugMessageLogARB))
979 arbDbg = (OpenGl_ArbDbg* )(&(*myFuncs));
982 && caps->contextDebug)
984 // setup default callback
985 arbDbg->glDebugMessageCallbackARB (debugCallbackWrap, this);
987 glEnable (GL_DEBUG_OUTPUT_SYNCHRONOUS_ARB);
992 // load OpenGL 1.2 new functions
993 has12 = IsGlGreaterEqual (1, 2)
994 && FindProcShort (glBlendColor)
995 && FindProcShort (glBlendEquation)
996 && FindProcShort (glDrawRangeElements)
997 && FindProcShort (glTexImage3D)
998 && FindProcShort (glTexSubImage3D)
999 && FindProcShort (glCopyTexSubImage3D);
1001 // load OpenGL 1.3 new functions
1002 has13 = IsGlGreaterEqual (1, 3)
1003 && FindProcShort (glActiveTexture)
1004 && FindProcShort (glSampleCoverage)
1005 && FindProcShort (glCompressedTexImage3D)
1006 && FindProcShort (glCompressedTexImage2D)
1007 && FindProcShort (glCompressedTexImage1D)
1008 && FindProcShort (glCompressedTexSubImage3D)
1009 && FindProcShort (glCompressedTexSubImage2D)
1010 && FindProcShort (glCompressedTexSubImage1D)
1011 && FindProcShort (glGetCompressedTexImage)
1012 && FindProcShort (glClientActiveTexture)
1013 && FindProcShort (glMultiTexCoord1d)
1014 && FindProcShort (glMultiTexCoord1dv)
1015 && FindProcShort (glMultiTexCoord1f)
1016 && FindProcShort (glMultiTexCoord1fv)
1017 && FindProcShort (glMultiTexCoord1i)
1018 && FindProcShort (glMultiTexCoord1iv)
1019 && FindProcShort (glMultiTexCoord1s)
1020 && FindProcShort (glMultiTexCoord1sv)
1021 && FindProcShort (glMultiTexCoord2d)
1022 && FindProcShort (glMultiTexCoord2dv)
1023 && FindProcShort (glMultiTexCoord2f)
1024 && FindProcShort (glMultiTexCoord2fv)
1025 && FindProcShort (glMultiTexCoord2i)
1026 && FindProcShort (glMultiTexCoord2iv)
1027 && FindProcShort (glMultiTexCoord2s)
1028 && FindProcShort (glMultiTexCoord2sv)
1029 && FindProcShort (glMultiTexCoord3d)
1030 && FindProcShort (glMultiTexCoord3dv)
1031 && FindProcShort (glMultiTexCoord3f)
1032 && FindProcShort (glMultiTexCoord3fv)
1033 && FindProcShort (glMultiTexCoord3i)
1034 && FindProcShort (glMultiTexCoord3iv)
1035 && FindProcShort (glMultiTexCoord3s)
1036 && FindProcShort (glMultiTexCoord3sv)
1037 && FindProcShort (glMultiTexCoord4d)
1038 && FindProcShort (glMultiTexCoord4dv)
1039 && FindProcShort (glMultiTexCoord4f)
1040 && FindProcShort (glMultiTexCoord4fv)
1041 && FindProcShort (glMultiTexCoord4i)
1042 && FindProcShort (glMultiTexCoord4iv)
1043 && FindProcShort (glMultiTexCoord4s)
1044 && FindProcShort (glMultiTexCoord4sv)
1045 && FindProcShort (glLoadTransposeMatrixf)
1046 && FindProcShort (glLoadTransposeMatrixd)
1047 && FindProcShort (glMultTransposeMatrixf)
1048 && FindProcShort (glMultTransposeMatrixd);
1050 // load OpenGL 1.4 new functions
1051 has14 = IsGlGreaterEqual (1, 4)
1052 && FindProcShort (glBlendFuncSeparate)
1053 && FindProcShort (glMultiDrawArrays)
1054 && FindProcShort (glMultiDrawElements)
1055 && FindProcShort (glPointParameterf)
1056 && FindProcShort (glPointParameterfv)
1057 && FindProcShort (glPointParameteri)
1058 && FindProcShort (glPointParameteriv);
1060 // load OpenGL 1.5 new functions
1061 has15 = IsGlGreaterEqual (1, 5)
1062 && FindProcShort (glGenQueries)
1063 && FindProcShort (glDeleteQueries)
1064 && FindProcShort (glIsQuery)
1065 && FindProcShort (glBeginQuery)
1066 && FindProcShort (glEndQuery)
1067 && FindProcShort (glGetQueryiv)
1068 && FindProcShort (glGetQueryObjectiv)
1069 && FindProcShort (glGetQueryObjectuiv)
1070 && FindProcShort (glBindBuffer)
1071 && FindProcShort (glDeleteBuffers)
1072 && FindProcShort (glGenBuffers)
1073 && FindProcShort (glIsBuffer)
1074 && FindProcShort (glBufferData)
1075 && FindProcShort (glBufferSubData)
1076 && FindProcShort (glGetBufferSubData)
1077 && FindProcShort (glMapBuffer)
1078 && FindProcShort (glUnmapBuffer)
1079 && FindProcShort (glGetBufferParameteriv)
1080 && FindProcShort (glGetBufferPointerv);
1082 // load OpenGL 2.0 new functions
1083 has20 = IsGlGreaterEqual (2, 0)
1084 && FindProcShort (glBlendEquationSeparate)
1085 && FindProcShort (glDrawBuffers)
1086 && FindProcShort (glStencilOpSeparate)
1087 && FindProcShort (glStencilFuncSeparate)
1088 && FindProcShort (glStencilMaskSeparate)
1089 && FindProcShort (glAttachShader)
1090 && FindProcShort (glBindAttribLocation)
1091 && FindProcShort (glCompileShader)
1092 && FindProcShort (glCreateProgram)
1093 && FindProcShort (glCreateShader)
1094 && FindProcShort (glDeleteProgram)
1095 && FindProcShort (glDeleteShader)
1096 && FindProcShort (glDetachShader)
1097 && FindProcShort (glDisableVertexAttribArray)
1098 && FindProcShort (glEnableVertexAttribArray)
1099 && FindProcShort (glGetActiveAttrib)
1100 && FindProcShort (glGetActiveUniform)
1101 && FindProcShort (glGetAttachedShaders)
1102 && FindProcShort (glGetAttribLocation)
1103 && FindProcShort (glGetProgramiv)
1104 && FindProcShort (glGetProgramInfoLog)
1105 && FindProcShort (glGetShaderiv)
1106 && FindProcShort (glGetShaderInfoLog)
1107 && FindProcShort (glGetShaderSource)
1108 && FindProcShort (glGetUniformLocation)
1109 && FindProcShort (glGetUniformfv)
1110 && FindProcShort (glGetUniformiv)
1111 && FindProcShort (glGetVertexAttribdv)
1112 && FindProcShort (glGetVertexAttribfv)
1113 && FindProcShort (glGetVertexAttribiv)
1114 && FindProcShort (glGetVertexAttribPointerv)
1115 && FindProcShort (glIsProgram)
1116 && FindProcShort (glIsShader)
1117 && FindProcShort (glLinkProgram)
1118 && FindProcShort (glShaderSource)
1119 && FindProcShort (glUseProgram)
1120 && FindProcShort (glUniform1f)
1121 && FindProcShort (glUniform2f)
1122 && FindProcShort (glUniform3f)
1123 && FindProcShort (glUniform4f)
1124 && FindProcShort (glUniform1i)
1125 && FindProcShort (glUniform2i)
1126 && FindProcShort (glUniform3i)
1127 && FindProcShort (glUniform4i)
1128 && FindProcShort (glUniform1fv)
1129 && FindProcShort (glUniform2fv)
1130 && FindProcShort (glUniform3fv)
1131 && FindProcShort (glUniform4fv)
1132 && FindProcShort (glUniform1iv)
1133 && FindProcShort (glUniform2iv)
1134 && FindProcShort (glUniform3iv)
1135 && FindProcShort (glUniform4iv)
1136 && FindProcShort (glUniformMatrix2fv)
1137 && FindProcShort (glUniformMatrix3fv)
1138 && FindProcShort (glUniformMatrix4fv)
1139 && FindProcShort (glValidateProgram)
1140 && FindProcShort (glVertexAttrib1d)
1141 && FindProcShort (glVertexAttrib1dv)
1142 && FindProcShort (glVertexAttrib1f)
1143 && FindProcShort (glVertexAttrib1fv)
1144 && FindProcShort (glVertexAttrib1s)
1145 && FindProcShort (glVertexAttrib1sv)
1146 && FindProcShort (glVertexAttrib2d)
1147 && FindProcShort (glVertexAttrib2dv)
1148 && FindProcShort (glVertexAttrib2f)
1149 && FindProcShort (glVertexAttrib2fv)
1150 && FindProcShort (glVertexAttrib2s)
1151 && FindProcShort (glVertexAttrib2sv)
1152 && FindProcShort (glVertexAttrib3d)
1153 && FindProcShort (glVertexAttrib3dv)
1154 && FindProcShort (glVertexAttrib3f)
1155 && FindProcShort (glVertexAttrib3fv)
1156 && FindProcShort (glVertexAttrib3s)
1157 && FindProcShort (glVertexAttrib3sv)
1158 && FindProcShort (glVertexAttrib4Nbv)
1159 && FindProcShort (glVertexAttrib4Niv)
1160 && FindProcShort (glVertexAttrib4Nsv)
1161 && FindProcShort (glVertexAttrib4Nub)
1162 && FindProcShort (glVertexAttrib4Nubv)
1163 && FindProcShort (glVertexAttrib4Nuiv)
1164 && FindProcShort (glVertexAttrib4Nusv)
1165 && FindProcShort (glVertexAttrib4bv)
1166 && FindProcShort (glVertexAttrib4d)
1167 && FindProcShort (glVertexAttrib4dv)
1168 && FindProcShort (glVertexAttrib4f)
1169 && FindProcShort (glVertexAttrib4fv)
1170 && FindProcShort (glVertexAttrib4iv)
1171 && FindProcShort (glVertexAttrib4s)
1172 && FindProcShort (glVertexAttrib4sv)
1173 && FindProcShort (glVertexAttrib4ubv)
1174 && FindProcShort (glVertexAttrib4uiv)
1175 && FindProcShort (glVertexAttrib4usv)
1176 && FindProcShort (glVertexAttribPointer);
1178 // load OpenGL 2.1 new functions
1179 has21 = IsGlGreaterEqual (2, 1)
1180 && FindProcShort (glUniformMatrix2x3fv)
1181 && FindProcShort (glUniformMatrix3x2fv)
1182 && FindProcShort (glUniformMatrix2x4fv)
1183 && FindProcShort (glUniformMatrix4x2fv)
1184 && FindProcShort (glUniformMatrix3x4fv)
1185 && FindProcShort (glUniformMatrix4x3fv);
1187 // load GL_ARB_framebuffer_object (added to OpenGL 3.0 core)
1188 const bool hasFBO = (IsGlGreaterEqual (3, 0) || CheckExtension ("GL_ARB_framebuffer_object"))
1189 && FindProcShort (glIsRenderbuffer)
1190 && FindProcShort (glBindRenderbuffer)
1191 && FindProcShort (glDeleteRenderbuffers)
1192 && FindProcShort (glGenRenderbuffers)
1193 && FindProcShort (glRenderbufferStorage)
1194 && FindProcShort (glGetRenderbufferParameteriv)
1195 && FindProcShort (glIsFramebuffer)
1196 && FindProcShort (glBindFramebuffer)
1197 && FindProcShort (glDeleteFramebuffers)
1198 && FindProcShort (glGenFramebuffers)
1199 && FindProcShort (glCheckFramebufferStatus)
1200 && FindProcShort (glFramebufferTexture1D)
1201 && FindProcShort (glFramebufferTexture2D)
1202 && FindProcShort (glFramebufferTexture3D)
1203 && FindProcShort (glFramebufferRenderbuffer)
1204 && FindProcShort (glGetFramebufferAttachmentParameteriv)
1205 && FindProcShort (glGenerateMipmap)
1206 && FindProcShort (glBlitFramebuffer)
1207 && FindProcShort (glRenderbufferStorageMultisample)
1208 && FindProcShort (glFramebufferTextureLayer);
1210 // load GL_ARB_vertex_array_object (added to OpenGL 3.0 core)
1211 const bool hasVAO = (IsGlGreaterEqual (3, 0) || CheckExtension ("GL_ARB_vertex_array_object"))
1212 && FindProcShort (glBindVertexArray)
1213 && FindProcShort (glDeleteVertexArrays)
1214 && FindProcShort (glGenVertexArrays)
1215 && FindProcShort (glIsVertexArray);
1217 // load GL_ARB_map_buffer_range (added to OpenGL 3.0 core)
1218 const bool hasMapBufferRange = (IsGlGreaterEqual (3, 0) || CheckExtension ("GL_ARB_map_buffer_range"))
1219 && FindProcShort (glMapBufferRange)
1220 && FindProcShort (glFlushMappedBufferRange);
1222 // load OpenGL 3.0 new functions
1223 has30 = IsGlGreaterEqual (3, 0)
1226 && hasMapBufferRange
1227 && FindProcShort (glColorMaski)
1228 && FindProcShort (glGetBooleani_v)
1229 && FindProcShort (glGetIntegeri_v)
1230 && FindProcShort (glEnablei)
1231 && FindProcShort (glDisablei)
1232 && FindProcShort (glIsEnabledi)
1233 && FindProcShort (glBeginTransformFeedback)
1234 && FindProcShort (glEndTransformFeedback)
1235 && FindProcShort (glBindBufferRange)
1236 && FindProcShort (glBindBufferBase)
1237 && FindProcShort (glTransformFeedbackVaryings)
1238 && FindProcShort (glGetTransformFeedbackVarying)
1239 && FindProcShort (glClampColor)
1240 && FindProcShort (glBeginConditionalRender)
1241 && FindProcShort (glEndConditionalRender)
1242 && FindProcShort (glVertexAttribIPointer)
1243 && FindProcShort (glGetVertexAttribIiv)
1244 && FindProcShort (glGetVertexAttribIuiv)
1245 && FindProcShort (glVertexAttribI1i)
1246 && FindProcShort (glVertexAttribI2i)
1247 && FindProcShort (glVertexAttribI3i)
1248 && FindProcShort (glVertexAttribI4i)
1249 && FindProcShort (glVertexAttribI1ui)
1250 && FindProcShort (glVertexAttribI2ui)
1251 && FindProcShort (glVertexAttribI3ui)
1252 && FindProcShort (glVertexAttribI4ui)
1253 && FindProcShort (glVertexAttribI1iv)
1254 && FindProcShort (glVertexAttribI2iv)
1255 && FindProcShort (glVertexAttribI3iv)
1256 && FindProcShort (glVertexAttribI4iv)
1257 && FindProcShort (glVertexAttribI1uiv)
1258 && FindProcShort (glVertexAttribI2uiv)
1259 && FindProcShort (glVertexAttribI3uiv)
1260 && FindProcShort (glVertexAttribI4uiv)
1261 && FindProcShort (glVertexAttribI4bv)
1262 && FindProcShort (glVertexAttribI4sv)
1263 && FindProcShort (glVertexAttribI4ubv)
1264 && FindProcShort (glVertexAttribI4usv)
1265 && FindProcShort (glGetUniformuiv)
1266 && FindProcShort (glBindFragDataLocation)
1267 && FindProcShort (glGetFragDataLocation)
1268 && FindProcShort (glUniform1ui)
1269 && FindProcShort (glUniform2ui)
1270 && FindProcShort (glUniform3ui)
1271 && FindProcShort (glUniform4ui)
1272 && FindProcShort (glUniform1uiv)
1273 && FindProcShort (glUniform2uiv)
1274 && FindProcShort (glUniform3uiv)
1275 && FindProcShort (glUniform4uiv)
1276 && FindProcShort (glTexParameterIiv)
1277 && FindProcShort (glTexParameterIuiv)
1278 && FindProcShort (glGetTexParameterIiv)
1279 && FindProcShort (glGetTexParameterIuiv)
1280 && FindProcShort (glClearBufferiv)
1281 && FindProcShort (glClearBufferuiv)
1282 && FindProcShort (glClearBufferfv)
1283 && FindProcShort (glClearBufferfi)
1284 && FindProcShort (glGetStringi);
1286 // load GL_ARB_uniform_buffer_object (added to OpenGL 3.1 core)
1287 const bool hasUBO = (IsGlGreaterEqual (3, 1) || CheckExtension ("GL_ARB_uniform_buffer_object"))
1288 && FindProcShort (glGetUniformIndices)
1289 && FindProcShort (glGetActiveUniformsiv)
1290 && FindProcShort (glGetActiveUniformName)
1291 && FindProcShort (glGetUniformBlockIndex)
1292 && FindProcShort (glGetActiveUniformBlockiv)
1293 && FindProcShort (glGetActiveUniformBlockName)
1294 && FindProcShort (glUniformBlockBinding);
1296 // load GL_ARB_copy_buffer (added to OpenGL 3.1 core)
1297 const bool hasCopyBufSubData = (IsGlGreaterEqual (3, 1) || CheckExtension ("GL_ARB_copy_buffer"))
1298 && FindProcShort (glCopyBufferSubData);
1302 // NPOT textures are required by OpenGL 2.0 specifications
1303 // but doesn't hardware accelerated by some ancient OpenGL 2.1 hardware (GeForce FX, RadeOn 9700 etc.)
1304 arbNPTW = Standard_True;
1305 arbTexRG = Standard_True;
1308 // load OpenGL 3.1 new functions
1309 has31 = IsGlGreaterEqual (3, 1)
1311 && hasCopyBufSubData
1312 && FindProcShort (glDrawArraysInstanced)
1313 && FindProcShort (glDrawElementsInstanced)
1314 && FindProcShort (glTexBuffer)
1315 && FindProcShort (glPrimitiveRestartIndex);
1317 // load GL_ARB_draw_elements_base_vertex (added to OpenGL 3.2 core)
1318 const bool hasDrawElemsBaseVert = (IsGlGreaterEqual (3, 2) || CheckExtension ("GL_ARB_draw_elements_base_vertex"))
1319 && FindProcShort (glDrawElementsBaseVertex)
1320 && FindProcShort (glDrawRangeElementsBaseVertex)
1321 && FindProcShort (glDrawElementsInstancedBaseVertex)
1322 && FindProcShort (glMultiDrawElementsBaseVertex);
1324 // load GL_ARB_provoking_vertex (added to OpenGL 3.2 core)
1325 const bool hasProvokingVert = (IsGlGreaterEqual (3, 2) || CheckExtension ("GL_ARB_provoking_vertex"))
1326 && FindProcShort (glProvokingVertex);
1328 // load GL_ARB_sync (added to OpenGL 3.2 core)
1329 const bool hasSync = (IsGlGreaterEqual (3, 2) || CheckExtension ("GL_ARB_sync"))
1330 && FindProcShort (glFenceSync)
1331 && FindProcShort (glIsSync)
1332 && FindProcShort (glDeleteSync)
1333 && FindProcShort (glClientWaitSync)
1334 && FindProcShort (glWaitSync)
1335 && FindProcShort (glGetInteger64v)
1336 && FindProcShort (glGetSynciv);
1338 // load GL_ARB_texture_multisample (added to OpenGL 3.2 core)
1339 const bool hasTextureMultisample = (IsGlGreaterEqual (3, 2) || CheckExtension ("GL_ARB_texture_multisample"))
1340 && FindProcShort (glTexImage2DMultisample)
1341 && FindProcShort (glTexImage3DMultisample)
1342 && FindProcShort (glGetMultisamplefv)
1343 && FindProcShort (glSampleMaski);
1345 // load OpenGL 3.2 new functions
1346 has32 = IsGlGreaterEqual (3, 2)
1347 && hasDrawElemsBaseVert
1350 && hasTextureMultisample
1351 && FindProcShort (glGetInteger64i_v)
1352 && FindProcShort (glGetBufferParameteri64v)
1353 && FindProcShort (glFramebufferTexture);
1355 // load GL_ARB_blend_func_extended (added to OpenGL 3.3 core)
1356 const bool hasBlendFuncExtended = (IsGlGreaterEqual (3, 3) || CheckExtension ("GL_ARB_blend_func_extended"))
1357 && FindProcShort (glBindFragDataLocationIndexed)
1358 && FindProcShort (glGetFragDataIndex);
1360 // load GL_ARB_sampler_objects (added to OpenGL 3.3 core)
1361 const bool hasSamplerObjects = (IsGlGreaterEqual (3, 3) || CheckExtension ("GL_ARB_sampler_objects"))
1362 && FindProcShort (glGenSamplers)
1363 && FindProcShort (glDeleteSamplers)
1364 && FindProcShort (glIsSampler)
1365 && FindProcShort (glBindSampler)
1366 && FindProcShort (glSamplerParameteri)
1367 && FindProcShort (glSamplerParameteriv)
1368 && FindProcShort (glSamplerParameterf)
1369 && FindProcShort (glSamplerParameterfv)
1370 && FindProcShort (glSamplerParameterIiv)
1371 && FindProcShort (glSamplerParameterIuiv)
1372 && FindProcShort (glGetSamplerParameteriv)
1373 && FindProcShort (glGetSamplerParameterIiv)
1374 && FindProcShort (glGetSamplerParameterfv)
1375 && FindProcShort (glGetSamplerParameterIuiv);
1377 // load GL_ARB_timer_query (added to OpenGL 3.3 core)
1378 const bool hasTimerQuery = (IsGlGreaterEqual (3, 3) || CheckExtension ("GL_ARB_timer_query"))
1379 && FindProcShort (glQueryCounter)
1380 && FindProcShort (glGetQueryObjecti64v)
1381 && FindProcShort (glGetQueryObjectui64v);
1383 // load GL_ARB_vertex_type_2_10_10_10_rev (added to OpenGL 3.3 core)
1384 const bool hasVertType21010101rev = (IsGlGreaterEqual (3, 3) || CheckExtension ("GL_ARB_vertex_type_2_10_10_10_rev"))
1385 && FindProcShort (glVertexP2ui)
1386 && FindProcShort (glVertexP2uiv)
1387 && FindProcShort (glVertexP3ui)
1388 && FindProcShort (glVertexP3uiv)
1389 && FindProcShort (glVertexP4ui)
1390 && FindProcShort (glVertexP4uiv)
1391 && FindProcShort (glTexCoordP1ui)
1392 && FindProcShort (glTexCoordP1uiv)
1393 && FindProcShort (glTexCoordP2ui)
1394 && FindProcShort (glTexCoordP2uiv)
1395 && FindProcShort (glTexCoordP3ui)
1396 && FindProcShort (glTexCoordP3uiv)
1397 && FindProcShort (glTexCoordP4ui)
1398 && FindProcShort (glTexCoordP4uiv)
1399 && FindProcShort (glMultiTexCoordP1ui)
1400 && FindProcShort (glMultiTexCoordP1uiv)
1401 && FindProcShort (glMultiTexCoordP2ui)
1402 && FindProcShort (glMultiTexCoordP2uiv)
1403 && FindProcShort (glMultiTexCoordP3ui)
1404 && FindProcShort (glMultiTexCoordP3uiv)
1405 && FindProcShort (glMultiTexCoordP4ui)
1406 && FindProcShort (glMultiTexCoordP4uiv)
1407 && FindProcShort (glNormalP3ui)
1408 && FindProcShort (glNormalP3uiv)
1409 && FindProcShort (glColorP3ui)
1410 && FindProcShort (glColorP3uiv)
1411 && FindProcShort (glColorP4ui)
1412 && FindProcShort (glColorP4uiv)
1413 && FindProcShort (glSecondaryColorP3ui)
1414 && FindProcShort (glSecondaryColorP3uiv)
1415 && FindProcShort (glVertexAttribP1ui)
1416 && FindProcShort (glVertexAttribP1uiv)
1417 && FindProcShort (glVertexAttribP2ui)
1418 && FindProcShort (glVertexAttribP2uiv)
1419 && FindProcShort (glVertexAttribP3ui)
1420 && FindProcShort (glVertexAttribP3uiv)
1421 && FindProcShort (glVertexAttribP4ui)
1422 && FindProcShort (glVertexAttribP4uiv);
1424 // load OpenGL 3.3 extra functions
1425 has33 = IsGlGreaterEqual (3, 3)
1426 && hasBlendFuncExtended
1427 && hasSamplerObjects
1429 && hasVertType21010101rev
1430 && FindProcShort (glVertexAttribDivisor);
1432 // load GL_ARB_draw_indirect (added to OpenGL 4.0 core)
1433 const bool hasDrawIndirect = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_draw_indirect"))
1434 && FindProcShort (glDrawArraysIndirect)
1435 && FindProcShort (glDrawElementsIndirect);
1437 // load GL_ARB_gpu_shader_fp64 (added to OpenGL 4.0 core)
1438 const bool hasShaderFP64 = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_gpu_shader_fp64"))
1439 && FindProcShort (glUniform1d)
1440 && FindProcShort (glUniform2d)
1441 && FindProcShort (glUniform3d)
1442 && FindProcShort (glUniform4d)
1443 && FindProcShort (glUniform1dv)
1444 && FindProcShort (glUniform2dv)
1445 && FindProcShort (glUniform3dv)
1446 && FindProcShort (glUniform4dv)
1447 && FindProcShort (glUniformMatrix2dv)
1448 && FindProcShort (glUniformMatrix3dv)
1449 && FindProcShort (glUniformMatrix4dv)
1450 && FindProcShort (glUniformMatrix2x3dv)
1451 && FindProcShort (glUniformMatrix2x4dv)
1452 && FindProcShort (glUniformMatrix3x2dv)
1453 && FindProcShort (glUniformMatrix3x4dv)
1454 && FindProcShort (glUniformMatrix4x2dv)
1455 && FindProcShort (glUniformMatrix4x3dv)
1456 && FindProcShort (glGetUniformdv);
1458 // load GL_ARB_shader_subroutine (added to OpenGL 4.0 core)
1459 const bool hasShaderSubroutine = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_shader_subroutine"))
1460 && FindProcShort (glGetSubroutineUniformLocation)
1461 && FindProcShort (glGetSubroutineIndex)
1462 && FindProcShort (glGetActiveSubroutineUniformiv)
1463 && FindProcShort (glGetActiveSubroutineUniformName)
1464 && FindProcShort (glGetActiveSubroutineName)
1465 && FindProcShort (glUniformSubroutinesuiv)
1466 && FindProcShort (glGetUniformSubroutineuiv)
1467 && FindProcShort (glGetProgramStageiv);
1469 // load GL_ARB_tessellation_shader (added to OpenGL 4.0 core)
1470 const bool hasTessellationShader = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_tessellation_shader"))
1471 && FindProcShort (glPatchParameteri)
1472 && FindProcShort (glPatchParameterfv);
1474 // load GL_ARB_transform_feedback2 (added to OpenGL 4.0 core)
1475 const bool hasTrsfFeedback2 = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_transform_feedback2"))
1476 && FindProcShort (glBindTransformFeedback)
1477 && FindProcShort (glDeleteTransformFeedbacks)
1478 && FindProcShort (glGenTransformFeedbacks)
1479 && FindProcShort (glIsTransformFeedback)
1480 && FindProcShort (glPauseTransformFeedback)
1481 && FindProcShort (glResumeTransformFeedback)
1482 && FindProcShort (glDrawTransformFeedback);
1484 // load GL_ARB_transform_feedback3 (added to OpenGL 4.0 core)
1485 const bool hasTrsfFeedback3 = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_transform_feedback3"))
1486 && FindProcShort (glDrawTransformFeedbackStream)
1487 && FindProcShort (glBeginQueryIndexed)
1488 && FindProcShort (glEndQueryIndexed)
1489 && FindProcShort (glGetQueryIndexediv);
1491 // load OpenGL 4.0 new functions
1492 has40 = IsGlGreaterEqual (4, 0)
1495 && hasShaderSubroutine
1496 && hasTessellationShader
1499 && FindProcShort (glMinSampleShading)
1500 && FindProcShort (glBlendEquationi)
1501 && FindProcShort (glBlendEquationSeparatei)
1502 && FindProcShort (glBlendFunci)
1503 && FindProcShort (glBlendFuncSeparatei);
1505 // load GL_ARB_ES2_compatibility (added to OpenGL 4.1 core)
1506 const bool hasES2Compatibility = (IsGlGreaterEqual (4, 1) || CheckExtension ("GL_ARB_ES2_compatibility"))
1507 && FindProcShort (glReleaseShaderCompiler)
1508 && FindProcShort (glShaderBinary)
1509 && FindProcShort (glGetShaderPrecisionFormat)
1510 && FindProcShort (glDepthRangef)
1511 && FindProcShort (glClearDepthf);
1513 // load GL_ARB_get_program_binary (added to OpenGL 4.1 core)
1514 const bool hasGetProgramBinary = (IsGlGreaterEqual (4, 1) || CheckExtension ("GL_ARB_get_program_binary"))
1515 && FindProcShort (glGetProgramBinary)
1516 && FindProcShort (glProgramBinary)
1517 && FindProcShort (glProgramParameteri);
1520 // load GL_ARB_separate_shader_objects (added to OpenGL 4.1 core)
1521 const bool hasSeparateShaderObjects = (IsGlGreaterEqual (4, 1) || CheckExtension ("GL_ARB_separate_shader_objects"))
1522 && FindProcShort (glUseProgramStages)
1523 && FindProcShort (glActiveShaderProgram)
1524 && FindProcShort (glCreateShaderProgramv)
1525 && FindProcShort (glBindProgramPipeline)
1526 && FindProcShort (glDeleteProgramPipelines)
1527 && FindProcShort (glGenProgramPipelines)
1528 && FindProcShort (glIsProgramPipeline)
1529 && FindProcShort (glGetProgramPipelineiv)
1530 && FindProcShort (glProgramUniform1i)
1531 && FindProcShort (glProgramUniform1iv)
1532 && FindProcShort (glProgramUniform1f)
1533 && FindProcShort (glProgramUniform1fv)
1534 && FindProcShort (glProgramUniform1d)
1535 && FindProcShort (glProgramUniform1dv)
1536 && FindProcShort (glProgramUniform1ui)
1537 && FindProcShort (glProgramUniform1uiv)
1538 && FindProcShort (glProgramUniform2i)
1539 && FindProcShort (glProgramUniform2iv)
1540 && FindProcShort (glProgramUniform2f)
1541 && FindProcShort (glProgramUniform2fv)
1542 && FindProcShort (glProgramUniform2d)
1543 && FindProcShort (glProgramUniform2dv)
1544 && FindProcShort (glProgramUniform2ui)
1545 && FindProcShort (glProgramUniform2uiv)
1546 && FindProcShort (glProgramUniform3i)
1547 && FindProcShort (glProgramUniform3iv)
1548 && FindProcShort (glProgramUniform3f)
1549 && FindProcShort (glProgramUniform3fv)
1550 && FindProcShort (glProgramUniform3d)
1551 && FindProcShort (glProgramUniform3dv)
1552 && FindProcShort (glProgramUniform3ui)
1553 && FindProcShort (glProgramUniform3uiv)
1554 && FindProcShort (glProgramUniform4i)
1555 && FindProcShort (glProgramUniform4iv)
1556 && FindProcShort (glProgramUniform4f)
1557 && FindProcShort (glProgramUniform4fv)
1558 && FindProcShort (glProgramUniform4d)
1559 && FindProcShort (glProgramUniform4dv)
1560 && FindProcShort (glProgramUniform4ui)
1561 && FindProcShort (glProgramUniform4uiv)
1562 && FindProcShort (glProgramUniformMatrix2fv)
1563 && FindProcShort (glProgramUniformMatrix3fv)
1564 && FindProcShort (glProgramUniformMatrix4fv)
1565 && FindProcShort (glProgramUniformMatrix2dv)
1566 && FindProcShort (glProgramUniformMatrix3dv)
1567 && FindProcShort (glProgramUniformMatrix4dv)
1568 && FindProcShort (glProgramUniformMatrix2x3fv)
1569 && FindProcShort (glProgramUniformMatrix3x2fv)
1570 && FindProcShort (glProgramUniformMatrix2x4fv)
1571 && FindProcShort (glProgramUniformMatrix4x2fv)
1572 && FindProcShort (glProgramUniformMatrix3x4fv)
1573 && FindProcShort (glProgramUniformMatrix4x3fv)
1574 && FindProcShort (glProgramUniformMatrix2x3dv)
1575 && FindProcShort (glProgramUniformMatrix3x2dv)
1576 && FindProcShort (glProgramUniformMatrix2x4dv)
1577 && FindProcShort (glProgramUniformMatrix4x2dv)
1578 && FindProcShort (glProgramUniformMatrix3x4dv)
1579 && FindProcShort (glProgramUniformMatrix4x3dv)
1580 && FindProcShort (glValidateProgramPipeline)
1581 && FindProcShort (glGetProgramPipelineInfoLog);
1583 // load GL_ARB_vertex_attrib_64bit (added to OpenGL 4.1 core)
1584 const bool hasVertAttrib64bit = (IsGlGreaterEqual (4, 1) || CheckExtension ("GL_ARB_vertex_attrib_64bit"))
1585 && FindProcShort (glVertexAttribL1d)
1586 && FindProcShort (glVertexAttribL2d)
1587 && FindProcShort (glVertexAttribL3d)
1588 && FindProcShort (glVertexAttribL4d)
1589 && FindProcShort (glVertexAttribL1dv)
1590 && FindProcShort (glVertexAttribL2dv)
1591 && FindProcShort (glVertexAttribL3dv)
1592 && FindProcShort (glVertexAttribL4dv)
1593 && FindProcShort (glVertexAttribLPointer)
1594 && FindProcShort (glGetVertexAttribLdv);
1596 // load GL_ARB_viewport_array (added to OpenGL 4.1 core)
1597 const bool hasViewportArray = (IsGlGreaterEqual (4, 1) || CheckExtension ("GL_ARB_viewport_array"))
1598 && FindProcShort (glViewportArrayv)
1599 && FindProcShort (glViewportIndexedf)
1600 && FindProcShort (glViewportIndexedfv)
1601 && FindProcShort (glScissorArrayv)
1602 && FindProcShort (glScissorIndexed)
1603 && FindProcShort (glScissorIndexedv)
1604 && FindProcShort (glDepthRangeArrayv)
1605 && FindProcShort (glDepthRangeIndexed)
1606 && FindProcShort (glGetFloati_v)
1607 && FindProcShort (glGetDoublei_v);
1609 has41 = IsGlGreaterEqual (4, 1)
1610 && hasES2Compatibility
1611 && hasGetProgramBinary
1612 && hasSeparateShaderObjects
1613 && hasVertAttrib64bit
1614 && hasViewportArray;
1616 // load GL_ARB_base_instance (added to OpenGL 4.2 core)
1617 const bool hasBaseInstance = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_base_instance"))
1618 && FindProcShort (glDrawArraysInstancedBaseInstance)
1619 && FindProcShort (glDrawElementsInstancedBaseInstance)
1620 && FindProcShort (glDrawElementsInstancedBaseVertexBaseInstance);
1622 // load GL_ARB_transform_feedback_instanced (added to OpenGL 4.2 core)
1623 const bool hasTrsfFeedbackInstanced = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_transform_feedback_instanced"))
1624 && FindProcShort (glDrawTransformFeedbackInstanced)
1625 && FindProcShort (glDrawTransformFeedbackStreamInstanced);
1627 // load GL_ARB_internalformat_query (added to OpenGL 4.2 core)
1628 const bool hasInternalFormatQuery = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_internalformat_query"))
1629 && FindProcShort (glGetInternalformativ);
1631 // load GL_ARB_shader_atomic_counters (added to OpenGL 4.2 core)
1632 const bool hasShaderAtomicCounters = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_shader_atomic_counters"))
1633 && FindProcShort (glGetActiveAtomicCounterBufferiv);
1635 // load GL_ARB_shader_image_load_store (added to OpenGL 4.2 core)
1636 const bool hasShaderImgLoadStore = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_shader_image_load_store"))
1637 && FindProcShort (glBindImageTexture)
1638 && FindProcShort (glMemoryBarrier);
1640 // load GL_ARB_texture_storage (added to OpenGL 4.2 core)
1641 const bool hasTextureStorage = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_texture_storage"))
1642 && FindProcShort (glTexStorage1D)
1643 && FindProcShort (glTexStorage2D)
1644 && FindProcShort (glTexStorage3D)
1645 && FindProcShort (glTextureStorage1DEXT)
1646 && FindProcShort (glTextureStorage2DEXT)
1647 && FindProcShort (glTextureStorage3DEXT);
1649 has42 = IsGlGreaterEqual (4, 2)
1651 && hasTrsfFeedbackInstanced
1652 && hasInternalFormatQuery
1653 && hasShaderAtomicCounters
1654 && hasShaderImgLoadStore
1655 && hasTextureStorage;
1657 has43 = IsGlGreaterEqual (4, 3)
1658 && FindProcShort (glClearBufferData)
1659 && FindProcShort (glClearBufferSubData)
1660 && FindProcShort (glDispatchCompute)
1661 && FindProcShort (glDispatchComputeIndirect)
1662 && FindProcShort (glCopyImageSubData)
1663 && FindProcShort (glFramebufferParameteri)
1664 && FindProcShort (glGetFramebufferParameteriv)
1665 && FindProcShort (glGetInternalformati64v)
1666 && FindProcShort (glInvalidateTexSubImage)
1667 && FindProcShort (glInvalidateTexImage)
1668 && FindProcShort (glInvalidateBufferSubData)
1669 && FindProcShort (glInvalidateBufferData)
1670 && FindProcShort (glInvalidateFramebuffer)
1671 && FindProcShort (glInvalidateSubFramebuffer)
1672 && FindProcShort (glMultiDrawArraysIndirect)
1673 && FindProcShort (glMultiDrawElementsIndirect)
1674 && FindProcShort (glGetProgramInterfaceiv)
1675 && FindProcShort (glGetProgramResourceIndex)
1676 && FindProcShort (glGetProgramResourceName)
1677 && FindProcShort (glGetProgramResourceiv)
1678 && FindProcShort (glGetProgramResourceLocation)
1679 && FindProcShort (glGetProgramResourceLocationIndex)
1680 && FindProcShort (glShaderStorageBlockBinding)
1681 && FindProcShort (glTexBufferRange)
1682 && FindProcShort (glTexStorage2DMultisample)
1683 && FindProcShort (glTexStorage3DMultisample)
1684 && FindProcShort (glTextureView)
1685 && FindProcShort (glBindVertexBuffer)
1686 && FindProcShort (glVertexAttribFormat)
1687 && FindProcShort (glVertexAttribIFormat)
1688 && FindProcShort (glVertexAttribLFormat)
1689 && FindProcShort (glVertexAttribBinding)
1690 && FindProcShort (glVertexBindingDivisor)
1691 && FindProcShort (glDebugMessageControl)
1692 && FindProcShort (glDebugMessageInsert)
1693 && FindProcShort (glDebugMessageCallback)
1694 && FindProcShort (glGetDebugMessageLog)
1695 && FindProcShort (glPushDebugGroup)
1696 && FindProcShort (glPopDebugGroup)
1697 && FindProcShort (glObjectLabel)
1698 && FindProcShort (glGetObjectLabel)
1699 && FindProcShort (glObjectPtrLabel)
1700 && FindProcShort (glGetObjectPtrLabel);
1702 // load GL_ARB_clear_texture (added to OpenGL 4.4 core)
1703 bool arbTexClear = (IsGlGreaterEqual (4, 4) || CheckExtension ("GL_ARB_clear_texture"))
1704 && FindProcShort (glClearTexImage)
1705 && FindProcShort (glClearTexSubImage);
1707 has44 = IsGlGreaterEqual (4, 4)
1709 && FindProcShort (glBufferStorage)
1710 && FindProcShort (glBindBuffersBase)
1711 && FindProcShort (glBindBuffersRange)
1712 && FindProcShort (glBindTextures)
1713 && FindProcShort (glBindSamplers)
1714 && FindProcShort (glBindImageTextures)
1715 && FindProcShort (glBindVertexBuffers);
1717 // initialize TBO extension (ARB)
1719 && CheckExtension ("GL_ARB_texture_buffer_object")
1720 && FindProc ("glTexBufferARB", myFuncs->glTexBuffer))
1722 arbTBO = (OpenGl_ArbTBO* )(&(*myFuncs));
1725 // initialize hardware instancing extension (ARB)
1727 && CheckExtension ("GL_ARB_draw_instanced")
1728 && FindProc ("glDrawArraysInstancedARB", myFuncs->glDrawArraysInstanced)
1729 && FindProc ("glDrawElementsInstancedARB", myFuncs->glDrawElementsInstanced))
1731 arbIns = (OpenGl_ArbIns* )(&(*myFuncs));
1734 // initialize FBO extension (ARB)
1737 arbFBO = (OpenGl_ArbFBO* )(&(*myFuncs));
1738 extPDS = Standard_True; // extension for EXT, but part of ARB
1741 // initialize GS extension (EXT)
1742 if (CheckExtension ("GL_EXT_geometry_shader4")
1743 && FindProcShort (glProgramParameteriEXT))
1745 extGS = (OpenGl_ExtGS* )(&(*myFuncs));
1772 core15 = (OpenGl_GlCore15* )(&(*myFuncs));
1773 core15fwd = (OpenGl_GlCore15Fwd* )(&(*myFuncs));
1782 core20 = (OpenGl_GlCore20* )(&(*myFuncs));
1783 core20fwd = (OpenGl_GlCore20Fwd* )(&(*myFuncs));
1805 arbTBO = (OpenGl_ArbTBO* )(&(*myFuncs));
1806 arbIns = (OpenGl_ArbIns* )(&(*myFuncs));
1814 core32 = (OpenGl_GlCore32* )(&(*myFuncs));
1815 core32back = (OpenGl_GlCore32Back* )(&(*myFuncs));
1837 core41 = (OpenGl_GlCore41* )(&(*myFuncs));
1838 core41back = (OpenGl_GlCore41Back* )(&(*myFuncs));
1846 core42 = (OpenGl_GlCore42* )(&(*myFuncs));
1847 core42back = (OpenGl_GlCore42Back* )(&(*myFuncs));
1855 core43 = (OpenGl_GlCore43* )(&(*myFuncs));
1856 core43back = (OpenGl_GlCore43Back* )(&(*myFuncs));
1864 core44 = (OpenGl_GlCore44* )(&(*myFuncs));
1865 core44back = (OpenGl_GlCore44Back* )(&(*myFuncs));
1869 // =======================================================================
1870 // function : MemoryInfo
1872 // =======================================================================
1873 Standard_Size OpenGl_Context::AvailableMemory() const
1875 #if !defined(GL_ES_VERSION_2_0)
1878 // this is actually information for VBO pool
1879 // however because pools are mostly shared
1880 // it can be used for total GPU memory estimations
1883 glGetIntegerv (GL_VBO_FREE_MEMORY_ATI, aMemInfo);
1884 // returned value is in KiB, however this maybe changed in future
1885 return Standard_Size(aMemInfo[0]) * 1024;
1889 // current available dedicated video memory (in KiB), currently unused GPU memory
1891 glGetIntegerv (GL_GPU_MEMORY_INFO_CURRENT_AVAILABLE_VIDMEM_NVX, &aMemInfo);
1892 return Standard_Size(aMemInfo) * 1024;
1898 // =======================================================================
1899 // function : MemoryInfo
1901 // =======================================================================
1902 TCollection_AsciiString OpenGl_Context::MemoryInfo() const
1904 TCollection_AsciiString anInfo;
1905 #if !defined(GL_ES_VERSION_2_0)
1909 memset (aValues, 0, sizeof(aValues));
1910 glGetIntegerv (GL_VBO_FREE_MEMORY_ATI, aValues);
1912 // total memory free in the pool
1913 anInfo += TCollection_AsciiString (" GPU free memory: ") + (aValues[0] / 1024) + " MiB\n";
1915 // largest available free block in the pool
1916 anInfo += TCollection_AsciiString (" Largest free block: ") + (aValues[1] / 1024) + " MiB\n";
1917 if (aValues[2] != aValues[0])
1919 // total auxiliary memory free
1920 anInfo += TCollection_AsciiString (" Free memory: ") + (aValues[2] / 1024) + " MiB\n";
1925 //current available dedicated video memory (in KiB), currently unused GPU memory
1927 glGetIntegerv (GL_GPU_MEMORY_INFO_CURRENT_AVAILABLE_VIDMEM_NVX, &aValue);
1928 anInfo += TCollection_AsciiString (" GPU free memory: ") + (aValue / 1024) + " MiB\n";
1930 // dedicated video memory, total size (in KiB) of the GPU memory
1931 GLint aDedicated = 0;
1932 glGetIntegerv (GL_GPU_MEMORY_INFO_DEDICATED_VIDMEM_NVX, &aDedicated);
1933 anInfo += TCollection_AsciiString (" GPU memory: ") + (aDedicated / 1024) + " MiB\n";
1935 // total available memory, total size (in KiB) of the memory available for allocations
1936 glGetIntegerv (GL_GPU_MEMORY_INFO_TOTAL_AVAILABLE_MEMORY_NVX, &aValue);
1937 if (aValue != aDedicated)
1939 // different only for special configurations
1940 anInfo += TCollection_AsciiString (" Total memory: ") + (aValue / 1024) + " MiB\n";
1948 // =======================================================================
1949 // function : GetResource
1951 // =======================================================================
1952 const Handle(OpenGl_Resource)& OpenGl_Context::GetResource (const TCollection_AsciiString& theKey) const
1954 return mySharedResources->IsBound (theKey) ? mySharedResources->Find (theKey) : NULL_GL_RESOURCE;
1957 // =======================================================================
1958 // function : ShareResource
1960 // =======================================================================
1961 Standard_Boolean OpenGl_Context::ShareResource (const TCollection_AsciiString& theKey,
1962 const Handle(OpenGl_Resource)& theResource)
1964 if (theKey.IsEmpty() || theResource.IsNull())
1966 return Standard_False;
1968 return mySharedResources->Bind (theKey, theResource);
1971 // =======================================================================
1972 // function : ReleaseResource
1974 // =======================================================================
1975 void OpenGl_Context::ReleaseResource (const TCollection_AsciiString& theKey,
1976 const Standard_Boolean theToDelay)
1978 if (!mySharedResources->IsBound (theKey))
1982 const Handle(OpenGl_Resource)& aRes = mySharedResources->Find (theKey);
1983 if (aRes->GetRefCount() > 1)
1990 myDelayed->Bind (theKey, 1);
1994 aRes->Release (this);
1995 mySharedResources->UnBind (theKey);
1999 // =======================================================================
2000 // function : DelayedRelease
2002 // =======================================================================
2003 void OpenGl_Context::DelayedRelease (Handle(OpenGl_Resource)& theResource)
2005 myUnusedResources->Prepend (theResource);
2006 theResource.Nullify();
2009 // =======================================================================
2010 // function : ReleaseDelayed
2012 // =======================================================================
2013 void OpenGl_Context::ReleaseDelayed()
2015 // release queued elements
2016 while (!myUnusedResources->IsEmpty())
2018 myUnusedResources->First()->Release (this);
2019 myUnusedResources->RemoveFirst();
2022 // release delayed shared resources
2023 NCollection_Vector<TCollection_AsciiString> aDeadList;
2024 for (NCollection_DataMap<TCollection_AsciiString, Standard_Integer>::Iterator anIter (*myDelayed);
2025 anIter.More(); anIter.Next())
2027 if (++anIter.ChangeValue() <= 2)
2029 continue; // postpone release one more frame to ensure noone use it periodically
2032 const TCollection_AsciiString& aKey = anIter.Key();
2033 if (!mySharedResources->IsBound (aKey))
2035 // mixed unshared strategy delayed/undelayed was used!
2036 aDeadList.Append (aKey);
2040 Handle(OpenGl_Resource)& aRes = mySharedResources->ChangeFind (aKey);
2041 if (aRes->GetRefCount() > 1)
2043 // should be only 1 instance in mySharedResources
2044 // if not - resource was reused again
2045 aDeadList.Append (aKey);
2049 // release resource if no one requiested it more than 2 redraw calls
2050 aRes->Release (this);
2051 mySharedResources->UnBind (aKey);
2052 aDeadList.Append (aKey);
2055 for (Standard_Integer anIter = 0; anIter < aDeadList.Length(); ++anIter)
2057 myDelayed->UnBind (aDeadList.Value (anIter));
2061 // =======================================================================
2062 // function : BindProgram
2064 // =======================================================================
2065 Standard_Boolean OpenGl_Context::BindProgram (const Handle(OpenGl_ShaderProgram)& theProgram)
2067 if (core20fwd == NULL)
2069 return Standard_False;
2072 if (theProgram.IsNull()
2073 || !theProgram->IsValid())
2075 if (!myActiveProgram.IsNull())
2077 core20fwd->glUseProgram (OpenGl_ShaderProgram::NO_PROGRAM);
2078 myActiveProgram.Nullify();
2080 return Standard_False;
2083 myActiveProgram = theProgram;
2084 core20fwd->glUseProgram (theProgram->ProgramId());
2085 return Standard_True;
2088 // =======================================================================
2089 // function : SetColor4fv
2091 // =======================================================================
2092 void OpenGl_Context::SetColor4fv (const OpenGl_Vec4& theColor)
2094 if (!myActiveProgram.IsNull())
2096 myActiveProgram->SetUniform (this, myActiveProgram->GetStateLocation (OpenGl_OCCT_COLOR), theColor);
2098 #if !defined(GL_ES_VERSION_2_0)
2099 else if (core11 != NULL)
2101 core11->glColor4fv (theColor.GetData());
2106 // =======================================================================
2107 // function : SetPointSize
2109 // =======================================================================
2110 void OpenGl_Context::SetPointSize (const Standard_ShortReal theSize)
2112 if (!myActiveProgram.IsNull())
2114 myActiveProgram->SetUniform (this, myActiveProgram->GetStateLocation (OpenGl_OCCT_POINT_SIZE), theSize);
2115 #if !defined(GL_ES_VERSION_2_0)
2116 //myContext->core11fwd->glEnable (GL_VERTEX_PROGRAM_POINT_SIZE);
2119 #if !defined(GL_ES_VERSION_2_0)
2122 core11fwd->glPointSize (theSize);
2123 if (core20fwd != NULL)
2125 //myContext->core11fwd->glDisable (GL_VERTEX_PROGRAM_POINT_SIZE);
2131 // =======================================================================
2132 // function : SetGlNormalizeEnabled
2134 // =======================================================================
2135 Standard_Boolean OpenGl_Context::SetGlNormalizeEnabled (Standard_Boolean isEnabled)
2137 if (isEnabled == myIsGlNormalizeEnabled)
2139 return myIsGlNormalizeEnabled;
2142 Standard_Boolean anOldGlNormalize = myIsGlNormalizeEnabled;
2144 myIsGlNormalizeEnabled = isEnabled;
2146 #if !defined(GL_ES_VERSION_2_0)
2149 glEnable (GL_NORMALIZE);
2153 glDisable (GL_NORMALIZE);
2157 return anOldGlNormalize;