1 // Created on: 2012-01-26
2 // Created by: Kirill GAVRILOV
3 // Copyright (c) 2012-2014 OPEN CASCADE SAS
5 // This file is part of Open CASCADE Technology software library.
7 // This library is free software; you can redistribute it and/or modify it under
8 // the terms of the GNU Lesser General Public License version 2.1 as published
9 // by the Free Software Foundation, with special exception defined in the file
10 // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
11 // distribution for complete text of the license and disclaimer of any warranty.
13 // Alternatively, this file may be used under the terms of Open CASCADE
14 // commercial license or contractual agreement.
20 #include <OpenGl_Context.hxx>
22 #include <OpenGl_ArbTBO.hxx>
23 #include <OpenGl_ArbIns.hxx>
24 #include <OpenGl_ArbDbg.hxx>
25 #include <OpenGl_ArbFBO.hxx>
26 #include <OpenGl_ExtGS.hxx>
27 #include <OpenGl_ArbTexBindless.hxx>
28 #include <OpenGl_GlCore44.hxx>
29 #include <OpenGl_Sampler.hxx>
30 #include <OpenGl_ShaderManager.hxx>
32 #include <Message_Messenger.hxx>
34 #include <NCollection_Vector.hxx>
36 #include <Standard_ProgramError.hxx>
41 #pragma comment(lib, "libEGL.lib")
45 #elif defined(__APPLE__) && !defined(MACOSX_USE_GLX)
48 #include <GL/glx.h> // glXGetProcAddress()
51 IMPLEMENT_STANDARD_HANDLE (OpenGl_Context, Standard_Transient)
52 IMPLEMENT_STANDARD_RTTIEXT(OpenGl_Context, Standard_Transient)
56 static const Handle(OpenGl_Resource) NULL_GL_RESOURCE;
59 // =======================================================================
60 // function : OpenGl_Context
62 // =======================================================================
63 OpenGl_Context::OpenGl_Context (const Handle(OpenGl_Caps)& theCaps)
82 caps (!theCaps.IsNull() ? theCaps : new OpenGl_Caps()),
83 #if defined(GL_ES_VERSION_2_0)
84 hasHighp (Standard_False),
85 hasTexRGBA8(Standard_False),
87 hasHighp (Standard_True),
88 hasTexRGBA8(Standard_True),
90 arbNPTW (Standard_False),
91 arbTexRG (Standard_False),
92 arbTexBindless (NULL),
94 arbTboRGB32 (Standard_False),
100 extBgra(Standard_False),
101 extAnis(Standard_False),
102 extPDS (Standard_False),
103 atiMem (Standard_False),
104 nvxMem (Standard_False),
105 mySharedResources (new OpenGl_ResourcesMap()),
106 myDelayed (new OpenGl_DelayReleaseMap()),
107 myUnusedResources (new OpenGl_ResourcesStack()),
109 myGlLibHandle (NULL),
110 myFuncs (new OpenGl_GlFunctions()),
112 myTexClamp (GL_CLAMP_TO_EDGE),
117 myIsInitialized (Standard_False),
118 myIsStereoBuffers (Standard_False),
119 myIsGlNormalizeEnabled (Standard_False),
120 #if !defined(GL_ES_VERSION_2_0)
121 myRenderMode (GL_RENDER),
127 myIsGlDebugCtx (Standard_False)
129 // system-dependent fields
130 #if defined(HAVE_EGL)
131 myDisplay = (Aspect_Display )EGL_NO_DISPLAY;
132 myWindow = (Aspect_Drawable )EGL_NO_SURFACE;
133 myGContext = (Aspect_RenderingContext )EGL_NO_CONTEXT);
134 #elif defined(_WIN32)
138 #elif defined(__APPLE__) && !defined(MACOSX_USE_GLX)
139 // Vendors can not extend functionality on this system
140 // and developers are limited to OpenGL support provided by Mac OS X SDK.
141 // We retrieve function pointers from system library
142 // to generalize extensions support on all platforms.
143 // In this way we also reach binary compatibility benefit between OS releases
144 // if some newest functionality is optionally used.
145 // Notice that GL version / extension availability checks are required
146 // because function pointers may be available but not functionality itself
147 // (depends on renderer).
149 myGlLibHandle = dlopen ("/System/Library/Frameworks/OpenGL.framework/Versions/Current/OpenGL", RTLD_LAZY);
155 memset (myFuncs.operator->(), 0, sizeof(OpenGl_GlFunctions));
156 myShaderManager = new OpenGl_ShaderManager (this);
159 // =======================================================================
160 // function : ~OpenGl_Context
162 // =======================================================================
163 OpenGl_Context::~OpenGl_Context()
165 // release clean up queue
168 #if !defined(GL_ES_VERSION_2_0)
169 // release default VAO
170 if (myDefaultVao != 0
174 core32->glDeleteVertexArrays (1, &myDefaultVao);
179 // release shared resources if any
180 if (((const Handle(Standard_Transient)& )mySharedResources)->GetRefCount() <= 1)
182 myShaderManager.Nullify();
183 for (NCollection_DataMap<TCollection_AsciiString, Handle(OpenGl_Resource)>::Iterator anIter (*mySharedResources);
184 anIter.More(); anIter.Next())
186 anIter.Value()->Release (this);
191 myShaderManager->SetContext (NULL);
193 mySharedResources.Nullify();
196 // release sampler object
197 if (!myTexSampler.IsNull())
199 myTexSampler->Release (this);
202 #if !defined(GL_ES_VERSION_2_0)
209 glGetPointerv (GL_DEBUG_CALLBACK_USER_PARAM_ARB, &aPtr);
212 arbDbg->glDebugMessageCallbackARB (NULL, NULL);
214 myIsGlDebugCtx = Standard_False;
219 // =======================================================================
220 // function : forcedRelease
222 // =======================================================================
223 void OpenGl_Context::forcedRelease()
226 for (NCollection_DataMap<TCollection_AsciiString, Handle(OpenGl_Resource)>::Iterator anIter (*mySharedResources);
227 anIter.More(); anIter.Next())
229 anIter.Value()->Release (this);
231 mySharedResources->Clear();
232 myShaderManager->clear();
233 myShaderManager->SetContext (NULL);
236 // =======================================================================
237 // function : MaxDegreeOfAnisotropy
239 // =======================================================================
240 Standard_Integer OpenGl_Context::MaxDegreeOfAnisotropy() const
245 // =======================================================================
246 // function : MaxTextureSize
248 // =======================================================================
249 Standard_Integer OpenGl_Context::MaxTextureSize() const
254 // =======================================================================
255 // function : MaxClipPlanes
257 // =======================================================================
258 Standard_Integer OpenGl_Context::MaxClipPlanes() const
260 return myMaxClipPlanes;
263 // =======================================================================
264 // function : SetDrawBufferLeft
266 // =======================================================================
267 void OpenGl_Context::SetDrawBufferLeft()
269 #if !defined(GL_ES_VERSION_2_0)
270 switch (myDrawBuffer)
274 glDrawBuffer (GL_BACK_LEFT);
275 myDrawBuffer = GL_BACK_LEFT;
278 case GL_FRONT_RIGHT :
280 glDrawBuffer (GL_FRONT_LEFT);
281 myDrawBuffer = GL_FRONT_LEFT;
284 case GL_FRONT_AND_BACK :
286 glDrawBuffer (GL_LEFT);
287 myDrawBuffer = GL_LEFT;
293 // =======================================================================
294 // function : SetDrawBufferRight
296 // =======================================================================
297 void OpenGl_Context::SetDrawBufferRight()
299 #if !defined(GL_ES_VERSION_2_0)
300 switch (myDrawBuffer)
304 glDrawBuffer (GL_BACK_RIGHT);
305 myDrawBuffer = GL_BACK_RIGHT;
310 glDrawBuffer (GL_FRONT_RIGHT);
311 myDrawBuffer = GL_FRONT_RIGHT;
314 case GL_FRONT_AND_BACK :
316 glDrawBuffer (GL_RIGHT);
317 myDrawBuffer = GL_RIGHT;
323 // =======================================================================
324 // function : SetDrawBufferMono
326 // =======================================================================
327 void OpenGl_Context::SetDrawBufferMono()
329 #if !defined(GL_ES_VERSION_2_0)
330 switch (myDrawBuffer)
334 glDrawBuffer (GL_BACK);
335 myDrawBuffer = GL_BACK;
339 case GL_FRONT_RIGHT :
340 glDrawBuffer (GL_FRONT);
341 myDrawBuffer = GL_FRONT;
346 glDrawBuffer (GL_FRONT_AND_BACK);
347 myDrawBuffer = GL_FRONT_AND_BACK;
353 // =======================================================================
354 // function : FetchState
356 // =======================================================================
357 void OpenGl_Context::FetchState()
359 #if !defined(GL_ES_VERSION_2_0)
360 // cache feedback mode state
363 ::glGetIntegerv (GL_RENDER_MODE, &myRenderMode);
366 // cache draw buffer state
367 glGetIntegerv (GL_DRAW_BUFFER, &myDrawBuffer);
371 // =======================================================================
374 // =======================================================================
375 void OpenGl_Context::Share (const Handle(OpenGl_Context)& theShareCtx)
377 if (!theShareCtx.IsNull())
379 mySharedResources = theShareCtx->mySharedResources;
380 myDelayed = theShareCtx->myDelayed;
381 myUnusedResources = theShareCtx->myUnusedResources;
382 myShaderManager = theShareCtx->myShaderManager;
386 #if !defined(__APPLE__) || defined(MACOSX_USE_GLX)
388 // =======================================================================
389 // function : IsCurrent
391 // =======================================================================
392 Standard_Boolean OpenGl_Context::IsCurrent() const
394 #if defined(HAVE_EGL)
395 if ((EGLDisplay )myDisplay == EGL_NO_DISPLAY
396 || (EGLSurface )myWindow == EGL_NO_SURFACE
397 || (EGLContext )myGContext == EGL_NO_CONTEXT)
399 return Standard_False;
402 return (((EGLDisplay )myDisplay == eglGetCurrentDisplay())
403 && ((EGLContext )myGContext == eglGetCurrentContext())
404 && ((EGLSurface )myWindow == eglGetCurrentSurface (EGL_DRAW)));
405 #elif defined(_WIN32)
406 if (myWindowDC == NULL || myGContext == NULL)
408 return Standard_False;
410 return (( (HDC )myWindowDC == wglGetCurrentDC())
411 && ((HGLRC )myGContext == wglGetCurrentContext()));
413 if (myDisplay == NULL || myWindow == 0 || myGContext == 0)
415 return Standard_False;
418 return ( ((Display* )myDisplay == glXGetCurrentDisplay())
419 && ((GLXContext )myGContext == glXGetCurrentContext())
420 && ((GLXDrawable )myWindow == glXGetCurrentDrawable()));
424 // =======================================================================
425 // function : MakeCurrent
427 // =======================================================================
428 Standard_Boolean OpenGl_Context::MakeCurrent()
430 #if defined(HAVE_EGL)
431 if ((EGLDisplay )myDisplay == EGL_NO_DISPLAY
432 || (EGLSurface )myWindow == EGL_NO_SURFACE
433 || (EGLContext )myGContext == EGL_NO_CONTEXT)
435 Standard_ProgramError_Raise_if (myIsInitialized, "OpenGl_Context::Init() should be called before!");
436 return Standard_False;
439 if (eglMakeCurrent ((EGLDisplay )myDisplay, (EGLSurface )myWindow, (EGLSurface )myWindow, (EGLContext )myGContext) != EGL_TRUE)
441 // if there is no current context it might be impossible to use glGetError() correctly
442 PushMessage (GL_DEBUG_SOURCE_WINDOW_SYSTEM_ARB, GL_DEBUG_TYPE_ERROR_ARB, 0, GL_DEBUG_SEVERITY_HIGH_ARB,
443 "eglMakeCurrent() has failed!");
444 myIsInitialized = Standard_False;
445 return Standard_False;
447 #elif defined(_WIN32)
448 if (myWindowDC == NULL || myGContext == NULL)
450 Standard_ProgramError_Raise_if (myIsInitialized, "OpenGl_Context::Init() should be called before!");
451 return Standard_False;
454 // technically it should be safe to activate already bound GL context
455 // however some drivers (Intel etc.) may FAIL doing this for unknown reason
458 myShaderManager->SetContext (this);
459 return Standard_True;
461 else if (wglMakeCurrent ((HDC )myWindowDC, (HGLRC )myGContext) != TRUE)
463 // notice that glGetError() couldn't be used here!
464 wchar_t* aMsgBuff = NULL;
465 DWORD anErrorCode = GetLastError();
466 FormatMessageW (FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
467 NULL, anErrorCode, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (wchar_t* )&aMsgBuff, 0, NULL);
468 TCollection_ExtendedString aMsg ("wglMakeCurrent() has failed. ");
469 if (aMsgBuff != NULL)
471 aMsg += (Standard_ExtString )aMsgBuff;
472 LocalFree (aMsgBuff);
474 PushMessage (GL_DEBUG_SOURCE_WINDOW_SYSTEM_ARB, GL_DEBUG_TYPE_ERROR_ARB, (unsigned int )anErrorCode, GL_DEBUG_SEVERITY_HIGH_ARB, aMsg);
475 myIsInitialized = Standard_False;
476 return Standard_False;
479 if (myDisplay == NULL || myWindow == 0 || myGContext == 0)
481 Standard_ProgramError_Raise_if (myIsInitialized, "OpenGl_Context::Init() should be called before!");
482 return Standard_False;
485 if (!glXMakeCurrent ((Display* )myDisplay, (GLXDrawable )myWindow, (GLXContext )myGContext))
487 // if there is no current context it might be impossible to use glGetError() correctly
488 PushMessage (GL_DEBUG_SOURCE_WINDOW_SYSTEM_ARB, GL_DEBUG_TYPE_ERROR_ARB, 0, GL_DEBUG_SEVERITY_HIGH_ARB,
489 "glXMakeCurrent() has failed!");
490 myIsInitialized = Standard_False;
491 return Standard_False;
494 myShaderManager->SetContext (this);
495 return Standard_True;
498 // =======================================================================
499 // function : SwapBuffers
501 // =======================================================================
502 void OpenGl_Context::SwapBuffers()
504 #if defined(HAVE_EGL)
505 if ((EGLSurface )myWindow != EGL_NO_SURFACE)
507 eglSwapBuffers ((EGLDisplay )myDisplay, (EGLSurface )myWindow);
509 #elif defined(_WIN32)
510 if ((HDC )myWindowDC != NULL)
512 ::SwapBuffers ((HDC )myWindowDC);
516 if ((Display* )myDisplay != NULL)
518 glXSwapBuffers ((Display* )myDisplay, (GLXDrawable )myWindow);
525 // =======================================================================
526 // function : findProc
528 // =======================================================================
529 void* OpenGl_Context::findProc (const char* theFuncName)
531 #if defined(HAVE_EGL)
532 return (void* )eglGetProcAddress (theFuncName);
533 #elif defined(_WIN32)
534 return wglGetProcAddress (theFuncName);
535 #elif defined(__APPLE__) && !defined(MACOSX_USE_GLX)
536 return (myGlLibHandle != NULL) ? dlsym (myGlLibHandle, theFuncName) : NULL;
538 return (void* )glXGetProcAddress ((const GLubyte* )theFuncName);
542 // =======================================================================
543 // function : CheckExtension
545 // =======================================================================
546 Standard_Boolean OpenGl_Context::CheckExtension (const char* theExtName) const
548 if (theExtName == NULL)
551 std::cerr << "CheckExtension called with NULL string!\n";
553 return Standard_False;
556 #if !defined(GL_ES_VERSION_2_0)
557 // available since OpenGL 3.0
558 // and the ONLY way to check extensions with OpenGL 3.1+ core profile
559 if (IsGlGreaterEqual (3, 0)
560 && myFuncs->glGetStringi != NULL)
563 ::glGetIntegerv (GL_NUM_EXTENSIONS, &anExtNb);
564 const size_t anExtNameLen = strlen (theExtName);
565 for (GLint anIter = 0; anIter < anExtNb; ++anIter)
567 const char* anExtension = (const char* )myFuncs->glGetStringi (GL_EXTENSIONS, (GLuint )anIter);
568 const size_t aTestExtNameLen = strlen (anExtension);
569 if (aTestExtNameLen == anExtNameLen
570 && strncmp (anExtension, theExtName, anExtNameLen) == 0)
572 return Standard_True;
575 return Standard_False;
579 // use old way with huge string for all extensions
580 const char* anExtString = (const char* )glGetString (GL_EXTENSIONS);
581 if (anExtString == NULL)
583 Messenger()->Send ("TKOpenGL: glGetString (GL_EXTENSIONS) has returned NULL! No GL context?", Message_Warning);
584 return Standard_False;
586 return CheckExtension (anExtString, theExtName);
589 // =======================================================================
590 // function : CheckExtension
592 // =======================================================================
593 Standard_Boolean OpenGl_Context::CheckExtension (const char* theExtString,
594 const char* theExtName)
596 if (theExtString == NULL)
598 return Standard_False;
601 // Search for theExtName in the extensions string.
602 // Use of strstr() is not sufficient because extension names can be prefixes of other extension names.
603 char* aPtrIter = (char* )theExtString;
604 const char* aPtrEnd = aPtrIter + strlen (theExtString);
605 const size_t anExtNameLen = strlen (theExtName);
606 while (aPtrIter < aPtrEnd)
608 const size_t n = strcspn (aPtrIter, " ");
609 if ((n == anExtNameLen) && (strncmp (aPtrIter, theExtName, anExtNameLen) == 0))
611 return Standard_True;
615 return Standard_False;
618 #if !defined(__APPLE__) || defined(MACOSX_USE_GLX)
620 // =======================================================================
623 // =======================================================================
624 Standard_Boolean OpenGl_Context::Init (const Standard_Boolean theIsCoreProfile)
628 return Standard_True;
631 #if defined(HAVE_EGL)
632 myDisplay = (Aspect_Display )eglGetCurrentDisplay();
633 myGContext = (Aspect_RenderingContext )eglGetCurrentContext();
634 myWindow = (Aspect_Drawable )eglGetCurrentSurface(EGL_DRAW);
635 #elif defined(_WIN32)
636 myWindowDC = (Aspect_Handle )wglGetCurrentDC();
637 myGContext = (Aspect_RenderingContext )wglGetCurrentContext();
639 myDisplay = (Aspect_Display )glXGetCurrentDisplay();
640 myGContext = (Aspect_RenderingContext )glXGetCurrentContext();
641 myWindow = (Aspect_Drawable )glXGetCurrentDrawable();
643 if (myGContext == NULL)
645 return Standard_False;
648 init (theIsCoreProfile);
649 myIsInitialized = Standard_True;
650 return Standard_True;
655 // =======================================================================
658 // =======================================================================
659 #if defined(HAVE_EGL)
660 Standard_Boolean OpenGl_Context::Init (const Aspect_Drawable theEglSurface,
661 const Aspect_Display theEglDisplay,
662 const Aspect_RenderingContext theEglContext,
663 const Standard_Boolean theIsCoreProfile)
664 #elif defined(_WIN32)
665 Standard_Boolean OpenGl_Context::Init (const Aspect_Handle theWindow,
666 const Aspect_Handle theWindowDC,
667 const Aspect_RenderingContext theGContext,
668 const Standard_Boolean theIsCoreProfile)
669 #elif defined(__APPLE__) && !defined(MACOSX_USE_GLX)
670 Standard_Boolean OpenGl_Context::Init (const void* theGContext,
671 const Standard_Boolean theIsCoreProfile)
673 Standard_Boolean OpenGl_Context::Init (const Aspect_Drawable theWindow,
674 const Aspect_Display theDisplay,
675 const Aspect_RenderingContext theGContext,
676 const Standard_Boolean theIsCoreProfile)
679 Standard_ProgramError_Raise_if (myIsInitialized, "OpenGl_Context::Init() should be called only once!");
680 #if defined(HAVE_EGL)
681 myWindow = theEglSurface;
682 myGContext = theEglContext;
683 myDisplay = theEglDisplay;
684 #elif defined(_WIN32)
685 myWindow = theWindow;
686 myGContext = theGContext;
687 myWindowDC = theWindowDC;
688 #elif defined(__APPLE__) && !defined(MACOSX_USE_GLX)
689 myGContext = (void* )theGContext;
691 myWindow = theWindow;
692 myGContext = theGContext;
693 myDisplay = theDisplay;
695 if (myGContext == NULL || !MakeCurrent())
697 return Standard_False;
700 init (theIsCoreProfile);
701 myIsInitialized = Standard_True;
702 return Standard_True;
705 // =======================================================================
706 // function : ResetErrors
708 // =======================================================================
709 void OpenGl_Context::ResetErrors()
711 while (glGetError() != GL_NO_ERROR)
717 // =======================================================================
718 // function : ReadGlVersion
720 // =======================================================================
721 void OpenGl_Context::ReadGlVersion (Standard_Integer& theGlVerMajor,
722 Standard_Integer& theGlVerMinor)
728 #ifdef GL_MAJOR_VERSION
729 // available since OpenGL 3.0 and OpenGL 3.0 ES
730 GLint aMajor = 0, aMinor = 0;
731 glGetIntegerv (GL_MAJOR_VERSION, &aMajor);
732 glGetIntegerv (GL_MINOR_VERSION, &aMinor);
733 // glGetError() sometimes does not report an error here even if
734 // GL does not know GL_MAJOR_VERSION and GL_MINOR_VERSION constants.
735 // This happens on some renderers like e.g. Cygwin MESA.
736 // Thus checking additionally if GL has put anything to
737 // the output variables.
738 if (::glGetError() == GL_NO_ERROR && aMajor != 0 && aMinor != 0)
740 theGlVerMajor = aMajor;
741 theGlVerMinor = aMinor;
744 for (GLenum anErr = ::glGetError(), aPrevErr = GL_NO_ERROR;; aPrevErr = anErr, anErr = ::glGetError())
746 if (anErr == GL_NO_ERROR
747 || anErr == aPrevErr)
754 // Read version string.
755 // Notice that only first two numbers split by point '2.1 XXXXX' are significant.
756 // Following trash (after space) is vendor-specific.
757 // New drivers also returns micro version of GL like '3.3.0' which has no meaning
758 // and should be considered as vendor-specific too.
759 const char* aVerStr = (const char* )glGetString (GL_VERSION);
760 if (aVerStr == NULL || *aVerStr == '\0')
762 // invalid GL context
766 //#if defined(GL_ES_VERSION_2_0)
767 // skip "OpenGL ES-** " section
768 for (; *aVerStr != '\0'; ++aVerStr)
770 if (*aVerStr >= '0' && *aVerStr <= '9')
777 // parse string for major number
781 while (aVerStr[aMajIter] >= '0' && aVerStr[aMajIter] <= '9')
785 if (aMajIter == 0 || aMajIter >= sizeof(aMajorStr))
789 memcpy (aMajorStr, aVerStr, aMajIter);
790 aMajorStr[aMajIter] = '\0';
792 // parse string for minor number
793 aVerStr += aMajIter + 1;
795 while (aVerStr[aMinIter] >= '0' && aVerStr[aMinIter] <= '9')
799 if (aMinIter == 0 || aMinIter >= sizeof(aMinorStr))
803 memcpy (aMinorStr, aVerStr, aMinIter);
804 aMinorStr[aMinIter] = '\0';
807 theGlVerMajor = atoi (aMajorStr);
808 theGlVerMinor = atoi (aMinorStr);
810 if (theGlVerMajor <= 0)
817 static Standard_CString THE_DBGMSG_UNKNOWN = "UNKNOWN";
818 static Standard_CString THE_DBGMSG_SOURCES[] =
820 ".OpenGL", // GL_DEBUG_SOURCE_API_ARB
821 ".WinSystem", // GL_DEBUG_SOURCE_WINDOW_SYSTEM_ARB
822 ".GLSL", // GL_DEBUG_SOURCE_SHADER_COMPILER_ARB
823 ".3rdParty", // GL_DEBUG_SOURCE_THIRD_PARTY_ARB
824 "", // GL_DEBUG_SOURCE_APPLICATION_ARB
825 ".Other" // GL_DEBUG_SOURCE_OTHER_ARB
828 static Standard_CString THE_DBGMSG_TYPES[] =
830 "Error", // GL_DEBUG_TYPE_ERROR_ARB
831 "Deprecated", // GL_DEBUG_TYPE_DEPRECATED_BEHAVIOR_ARB
832 "Undef. behavior", // GL_DEBUG_TYPE_UNDEFINED_BEHAVIOR_ARB
833 "Portability", // GL_DEBUG_TYPE_PORTABILITY_ARB
834 "Performance", // GL_DEBUG_TYPE_PERFORMANCE_ARB
835 "Other" // GL_DEBUG_TYPE_OTHER_ARB
838 static Standard_CString THE_DBGMSG_SEV_HIGH = "High"; // GL_DEBUG_SEVERITY_HIGH_ARB
839 static Standard_CString THE_DBGMSG_SEV_MEDIUM = "Medium"; // GL_DEBUG_SEVERITY_MEDIUM_ARB
840 static Standard_CString THE_DBGMSG_SEV_LOW = "Low"; // GL_DEBUG_SEVERITY_LOW_ARB
842 #if !defined(GL_ES_VERSION_2_0)
843 //! Callback for GL_ARB_debug_output extension
844 static void APIENTRY debugCallbackWrap(unsigned int theSource,
845 unsigned int theType,
847 unsigned int theSeverity,
849 const char* theMessage,
850 const void* theUserParam)
852 OpenGl_Context* aCtx = (OpenGl_Context* )theUserParam;
853 aCtx->PushMessage (theSource, theType, theId, theSeverity, theMessage);
857 // =======================================================================
858 // function : PushMessage
860 // =======================================================================
861 void OpenGl_Context::PushMessage (const unsigned int theSource,
862 const unsigned int theType,
863 const unsigned int theId,
864 const unsigned int theSeverity,
865 const TCollection_ExtendedString& theMessage)
867 //OpenGl_Context* aCtx = (OpenGl_Context* )theUserParam;
868 Standard_CString& aSrc = (theSource >= GL_DEBUG_SOURCE_API_ARB
869 && theSource <= GL_DEBUG_SOURCE_OTHER_ARB)
870 ? THE_DBGMSG_SOURCES[theSource - GL_DEBUG_SOURCE_API_ARB]
871 : THE_DBGMSG_UNKNOWN;
872 Standard_CString& aType = (theType >= GL_DEBUG_TYPE_ERROR_ARB
873 && theType <= GL_DEBUG_TYPE_OTHER_ARB)
874 ? THE_DBGMSG_TYPES[theType - GL_DEBUG_TYPE_ERROR_ARB]
875 : THE_DBGMSG_UNKNOWN;
876 Standard_CString& aSev = theSeverity == GL_DEBUG_SEVERITY_HIGH_ARB
877 ? THE_DBGMSG_SEV_HIGH
878 : (theSeverity == GL_DEBUG_SEVERITY_MEDIUM_ARB
879 ? THE_DBGMSG_SEV_MEDIUM
880 : THE_DBGMSG_SEV_LOW);
881 Message_Gravity aGrav = theSeverity == GL_DEBUG_SEVERITY_HIGH_ARB
883 : (theSeverity == GL_DEBUG_SEVERITY_MEDIUM_ARB
887 TCollection_ExtendedString aMsg;
888 aMsg += "TKOpenGl"; aMsg += aSrc;
889 aMsg += " | Type: "; aMsg += aType;
890 aMsg += " | ID: "; aMsg += (Standard_Integer )theId;
891 aMsg += " | Severity: "; aMsg += aSev;
892 aMsg += " | Message:\n ";
894 Messenger()->Send (aMsg, aGrav);
897 // =======================================================================
900 // =======================================================================
901 void OpenGl_Context::init (const Standard_Boolean theIsCoreProfile)
906 ReadGlVersion (myGlVerMajor, myGlVerMinor);
908 #if defined(GL_ES_VERSION_2_0)
909 (void )theIsCoreProfile;
910 const bool isCoreProfile = false;
912 if (IsGlGreaterEqual (3, 0))
914 // retrieve auxiliary function in advance
915 FindProc ("glGetStringi", myFuncs->glGetStringi);
918 // this check would not work well due to buggy NVIDIA drivers!
919 /*GLint aProfile = 0;
920 if (IsGlGreaterEqual (3, 2))
922 ::glGetIntegerv (GL_CONTEXT_PROFILE_MASK, &aProfile);
924 const bool isCoreProfile = (aProfile & GL_CONTEXT_CORE_PROFILE_BIT) != 0;*/
926 // detect Core profile
927 /*for (int anErr = glGetError(), aPrevErr = GL_NO_ERROR;; aPrevErr = anErr, anErr = glGetError())
929 if (anErr == aPrevErr)
934 const char* anExtString = (const char* )::glGetString (GL_EXTENSIONS);
935 const bool isCoreProfile = IsGlGreaterEqual (3, 2) && (glGetError() != GL_NO_ERROR);*/
937 const bool isCoreProfile = IsGlGreaterEqual (3, 2) && theIsCoreProfile;
943 core11 = (OpenGl_GlCore11* )(&(*myFuncs));
945 core11fwd = (OpenGl_GlCore11Fwd* )(&(*myFuncs));
963 arbTboRGB32 = Standard_False;
971 #if defined(GL_ES_VERSION_2_0)
973 hasTexRGBA8 = IsGlGreaterEqual (3, 0)
974 || CheckExtension ("GL_OES_rgb8_rgba8");
975 // NPOT textures has limited support within OpenGL ES 2.0
976 // which are relaxed by OpenGL ES 3.0 or some extensions
977 //arbNPTW = IsGlGreaterEqual (3, 0)
978 // || CheckExtension ("GL_OES_texture_npot")
979 // || CheckExtension ("GL_NV_texture_npot_2D_mipmap");
980 arbNPTW = Standard_True;
981 arbTexRG = IsGlGreaterEqual (3, 0)
982 || CheckExtension ("GL_EXT_texture_rg");
983 extBgra = CheckExtension ("GL_EXT_texture_format_BGRA8888");
984 extAnis = CheckExtension ("GL_EXT_texture_filter_anisotropic");
985 extPDS = CheckExtension ("GL_OES_packed_depth_stencil");
987 core11fwd = (OpenGl_GlCore11Fwd* )(&(*myFuncs));
988 if (IsGlGreaterEqual (2, 0))
990 // enable compatible functions
991 core20 = (OpenGl_GlCore20* )(&(*myFuncs));
992 core20fwd = (OpenGl_GlCore20Fwd* )(&(*myFuncs));
993 core15fwd = (OpenGl_GlCore15Fwd* )(&(*myFuncs));
994 arbFBO = (OpenGl_ArbFBO* )(&(*myFuncs));
996 if (IsGlGreaterEqual (3, 0)
997 && FindProc ("glBlitFramebuffer", myFuncs->glBlitFramebuffer))
999 arbFBOBlit = (OpenGl_ArbFBOBlit* )(&(*myFuncs));
1002 hasHighp = CheckExtension ("OES_fragment_precision_high");
1003 GLint aRange[2] = {0, 0};
1004 GLint aPrec [2] = {0, 0};
1005 ::glGetShaderPrecisionFormat (GL_FRAGMENT_SHADER, GL_HIGH_FLOAT, aRange, aPrec);
1008 hasHighp = Standard_True;
1012 myTexClamp = IsGlGreaterEqual (1, 2) ? GL_CLAMP_TO_EDGE : GL_CLAMP;
1014 hasTexRGBA8 = Standard_True;
1015 arbNPTW = CheckExtension ("GL_ARB_texture_non_power_of_two");
1016 extBgra = CheckExtension ("GL_EXT_bgra");
1017 extAnis = CheckExtension ("GL_EXT_texture_filter_anisotropic");
1018 extPDS = CheckExtension ("GL_EXT_packed_depth_stencil");
1019 atiMem = CheckExtension ("GL_ATI_meminfo");
1020 nvxMem = CheckExtension ("GL_NVX_gpu_memory_info");
1022 GLint aStereo = GL_FALSE;
1023 glGetIntegerv (GL_STEREO, &aStereo);
1024 myIsStereoBuffers = aStereo == 1;
1026 // get number of maximum clipping planes
1027 glGetIntegerv (GL_MAX_CLIP_PLANES, &myMaxClipPlanes);
1030 glGetIntegerv (GL_MAX_TEXTURE_SIZE, &myMaxTexDim);
1034 glGetIntegerv (GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &myAnisoMax);
1037 myClippingState.Init (myMaxClipPlanes);
1039 #if !defined(GL_ES_VERSION_2_0)
1057 //! Make record shorter to retrieve function pointer using variable with same name
1058 #define FindProcShort(theFunc) FindProc(#theFunc, myFuncs->theFunc)
1060 // retrieve platform-dependent extensions
1061 #if defined(_WIN32) && !defined(HAVE_EGL)
1062 if (FindProcShort (wglGetExtensionsStringARB))
1064 const char* aWglExts = myFuncs->wglGetExtensionsStringARB (wglGetCurrentDC());
1065 if (CheckExtension (aWglExts, "WGL_EXT_swap_control"))
1067 FindProcShort (wglSwapIntervalEXT);
1069 if (CheckExtension (aWglExts, "WGL_ARB_pixel_format"))
1071 FindProcShort (wglChoosePixelFormatARB);
1073 if (CheckExtension (aWglExts, "WGL_ARB_create_context_profile"))
1075 FindProcShort (wglCreateContextAttribsARB);
1077 if (CheckExtension (aWglExts, "WGL_NV_DX_interop"))
1079 FindProcShort (wglDXSetResourceShareHandleNV);
1080 FindProcShort (wglDXOpenDeviceNV);
1081 FindProcShort (wglDXCloseDeviceNV);
1082 FindProcShort (wglDXRegisterObjectNV);
1083 FindProcShort (wglDXUnregisterObjectNV);
1084 FindProcShort (wglDXObjectAccessNV);
1085 FindProcShort (wglDXLockObjectsNV);
1086 FindProcShort (wglDXUnlockObjectsNV);
1091 // initialize debug context extension
1092 if (CheckExtension ("GL_ARB_debug_output"))
1095 if (FindProcShort (glDebugMessageControlARB)
1096 && FindProcShort (glDebugMessageInsertARB)
1097 && FindProcShort (glDebugMessageCallbackARB)
1098 && FindProcShort (glGetDebugMessageLogARB))
1100 arbDbg = (OpenGl_ArbDbg* )(&(*myFuncs));
1103 && caps->contextDebug)
1105 // setup default callback
1106 myIsGlDebugCtx = Standard_True;
1107 arbDbg->glDebugMessageCallbackARB (debugCallbackWrap, this);
1109 glEnable (GL_DEBUG_OUTPUT_SYNCHRONOUS_ARB);
1114 // load OpenGL 1.2 new functions
1115 has12 = IsGlGreaterEqual (1, 2)
1116 && FindProcShort (glBlendColor)
1117 && FindProcShort (glBlendEquation)
1118 && FindProcShort (glDrawRangeElements)
1119 && FindProcShort (glTexImage3D)
1120 && FindProcShort (glTexSubImage3D)
1121 && FindProcShort (glCopyTexSubImage3D);
1123 // load OpenGL 1.3 new functions
1124 has13 = IsGlGreaterEqual (1, 3)
1125 && FindProcShort (glActiveTexture)
1126 && FindProcShort (glSampleCoverage)
1127 && FindProcShort (glCompressedTexImage3D)
1128 && FindProcShort (glCompressedTexImage2D)
1129 && FindProcShort (glCompressedTexImage1D)
1130 && FindProcShort (glCompressedTexSubImage3D)
1131 && FindProcShort (glCompressedTexSubImage2D)
1132 && FindProcShort (glCompressedTexSubImage1D)
1133 && FindProcShort (glGetCompressedTexImage);
1138 && FindProcShort (glClientActiveTexture)
1139 && FindProcShort (glMultiTexCoord1d)
1140 && FindProcShort (glMultiTexCoord1dv)
1141 && FindProcShort (glMultiTexCoord1f)
1142 && FindProcShort (glMultiTexCoord1fv)
1143 && FindProcShort (glMultiTexCoord1i)
1144 && FindProcShort (glMultiTexCoord1iv)
1145 && FindProcShort (glMultiTexCoord1s)
1146 && FindProcShort (glMultiTexCoord1sv)
1147 && FindProcShort (glMultiTexCoord2d)
1148 && FindProcShort (glMultiTexCoord2dv)
1149 && FindProcShort (glMultiTexCoord2f)
1150 && FindProcShort (glMultiTexCoord2fv)
1151 && FindProcShort (glMultiTexCoord2i)
1152 && FindProcShort (glMultiTexCoord2iv)
1153 && FindProcShort (glMultiTexCoord2s)
1154 && FindProcShort (glMultiTexCoord2sv)
1155 && FindProcShort (glMultiTexCoord3d)
1156 && FindProcShort (glMultiTexCoord3dv)
1157 && FindProcShort (glMultiTexCoord3f)
1158 && FindProcShort (glMultiTexCoord3fv)
1159 && FindProcShort (glMultiTexCoord3i)
1160 && FindProcShort (glMultiTexCoord3iv)
1161 && FindProcShort (glMultiTexCoord3s)
1162 && FindProcShort (glMultiTexCoord3sv)
1163 && FindProcShort (glMultiTexCoord4d)
1164 && FindProcShort (glMultiTexCoord4dv)
1165 && FindProcShort (glMultiTexCoord4f)
1166 && FindProcShort (glMultiTexCoord4fv)
1167 && FindProcShort (glMultiTexCoord4i)
1168 && FindProcShort (glMultiTexCoord4iv)
1169 && FindProcShort (glMultiTexCoord4s)
1170 && FindProcShort (glMultiTexCoord4sv)
1171 && FindProcShort (glLoadTransposeMatrixf)
1172 && FindProcShort (glLoadTransposeMatrixd)
1173 && FindProcShort (glMultTransposeMatrixf)
1174 && FindProcShort (glMultTransposeMatrixd);
1177 // load OpenGL 1.4 new functions
1178 has14 = IsGlGreaterEqual (1, 4)
1179 && FindProcShort (glBlendFuncSeparate)
1180 && FindProcShort (glMultiDrawArrays)
1181 && FindProcShort (glMultiDrawElements)
1182 && FindProcShort (glPointParameterf)
1183 && FindProcShort (glPointParameterfv)
1184 && FindProcShort (glPointParameteri)
1185 && FindProcShort (glPointParameteriv);
1187 // load OpenGL 1.5 new functions
1188 has15 = IsGlGreaterEqual (1, 5)
1189 && FindProcShort (glGenQueries)
1190 && FindProcShort (glDeleteQueries)
1191 && FindProcShort (glIsQuery)
1192 && FindProcShort (glBeginQuery)
1193 && FindProcShort (glEndQuery)
1194 && FindProcShort (glGetQueryiv)
1195 && FindProcShort (glGetQueryObjectiv)
1196 && FindProcShort (glGetQueryObjectuiv)
1197 && FindProcShort (glBindBuffer)
1198 && FindProcShort (glDeleteBuffers)
1199 && FindProcShort (glGenBuffers)
1200 && FindProcShort (glIsBuffer)
1201 && FindProcShort (glBufferData)
1202 && FindProcShort (glBufferSubData)
1203 && FindProcShort (glGetBufferSubData)
1204 && FindProcShort (glMapBuffer)
1205 && FindProcShort (glUnmapBuffer)
1206 && FindProcShort (glGetBufferParameteriv)
1207 && FindProcShort (glGetBufferPointerv);
1209 // load OpenGL 2.0 new functions
1210 has20 = IsGlGreaterEqual (2, 0)
1211 && FindProcShort (glBlendEquationSeparate)
1212 && FindProcShort (glDrawBuffers)
1213 && FindProcShort (glStencilOpSeparate)
1214 && FindProcShort (glStencilFuncSeparate)
1215 && FindProcShort (glStencilMaskSeparate)
1216 && FindProcShort (glAttachShader)
1217 && FindProcShort (glBindAttribLocation)
1218 && FindProcShort (glCompileShader)
1219 && FindProcShort (glCreateProgram)
1220 && FindProcShort (glCreateShader)
1221 && FindProcShort (glDeleteProgram)
1222 && FindProcShort (glDeleteShader)
1223 && FindProcShort (glDetachShader)
1224 && FindProcShort (glDisableVertexAttribArray)
1225 && FindProcShort (glEnableVertexAttribArray)
1226 && FindProcShort (glGetActiveAttrib)
1227 && FindProcShort (glGetActiveUniform)
1228 && FindProcShort (glGetAttachedShaders)
1229 && FindProcShort (glGetAttribLocation)
1230 && FindProcShort (glGetProgramiv)
1231 && FindProcShort (glGetProgramInfoLog)
1232 && FindProcShort (glGetShaderiv)
1233 && FindProcShort (glGetShaderInfoLog)
1234 && FindProcShort (glGetShaderSource)
1235 && FindProcShort (glGetUniformLocation)
1236 && FindProcShort (glGetUniformfv)
1237 && FindProcShort (glGetUniformiv)
1238 && FindProcShort (glGetVertexAttribdv)
1239 && FindProcShort (glGetVertexAttribfv)
1240 && FindProcShort (glGetVertexAttribiv)
1241 && FindProcShort (glGetVertexAttribPointerv)
1242 && FindProcShort (glIsProgram)
1243 && FindProcShort (glIsShader)
1244 && FindProcShort (glLinkProgram)
1245 && FindProcShort (glShaderSource)
1246 && FindProcShort (glUseProgram)
1247 && FindProcShort (glUniform1f)
1248 && FindProcShort (glUniform2f)
1249 && FindProcShort (glUniform3f)
1250 && FindProcShort (glUniform4f)
1251 && FindProcShort (glUniform1i)
1252 && FindProcShort (glUniform2i)
1253 && FindProcShort (glUniform3i)
1254 && FindProcShort (glUniform4i)
1255 && FindProcShort (glUniform1fv)
1256 && FindProcShort (glUniform2fv)
1257 && FindProcShort (glUniform3fv)
1258 && FindProcShort (glUniform4fv)
1259 && FindProcShort (glUniform1iv)
1260 && FindProcShort (glUniform2iv)
1261 && FindProcShort (glUniform3iv)
1262 && FindProcShort (glUniform4iv)
1263 && FindProcShort (glUniformMatrix2fv)
1264 && FindProcShort (glUniformMatrix3fv)
1265 && FindProcShort (glUniformMatrix4fv)
1266 && FindProcShort (glValidateProgram)
1267 && FindProcShort (glVertexAttrib1d)
1268 && FindProcShort (glVertexAttrib1dv)
1269 && FindProcShort (glVertexAttrib1f)
1270 && FindProcShort (glVertexAttrib1fv)
1271 && FindProcShort (glVertexAttrib1s)
1272 && FindProcShort (glVertexAttrib1sv)
1273 && FindProcShort (glVertexAttrib2d)
1274 && FindProcShort (glVertexAttrib2dv)
1275 && FindProcShort (glVertexAttrib2f)
1276 && FindProcShort (glVertexAttrib2fv)
1277 && FindProcShort (glVertexAttrib2s)
1278 && FindProcShort (glVertexAttrib2sv)
1279 && FindProcShort (glVertexAttrib3d)
1280 && FindProcShort (glVertexAttrib3dv)
1281 && FindProcShort (glVertexAttrib3f)
1282 && FindProcShort (glVertexAttrib3fv)
1283 && FindProcShort (glVertexAttrib3s)
1284 && FindProcShort (glVertexAttrib3sv)
1285 && FindProcShort (glVertexAttrib4Nbv)
1286 && FindProcShort (glVertexAttrib4Niv)
1287 && FindProcShort (glVertexAttrib4Nsv)
1288 && FindProcShort (glVertexAttrib4Nub)
1289 && FindProcShort (glVertexAttrib4Nubv)
1290 && FindProcShort (glVertexAttrib4Nuiv)
1291 && FindProcShort (glVertexAttrib4Nusv)
1292 && FindProcShort (glVertexAttrib4bv)
1293 && FindProcShort (glVertexAttrib4d)
1294 && FindProcShort (glVertexAttrib4dv)
1295 && FindProcShort (glVertexAttrib4f)
1296 && FindProcShort (glVertexAttrib4fv)
1297 && FindProcShort (glVertexAttrib4iv)
1298 && FindProcShort (glVertexAttrib4s)
1299 && FindProcShort (glVertexAttrib4sv)
1300 && FindProcShort (glVertexAttrib4ubv)
1301 && FindProcShort (glVertexAttrib4uiv)
1302 && FindProcShort (glVertexAttrib4usv)
1303 && FindProcShort (glVertexAttribPointer);
1305 // load OpenGL 2.1 new functions
1306 has21 = IsGlGreaterEqual (2, 1)
1307 && FindProcShort (glUniformMatrix2x3fv)
1308 && FindProcShort (glUniformMatrix3x2fv)
1309 && FindProcShort (glUniformMatrix2x4fv)
1310 && FindProcShort (glUniformMatrix4x2fv)
1311 && FindProcShort (glUniformMatrix3x4fv)
1312 && FindProcShort (glUniformMatrix4x3fv);
1314 // load GL_ARB_framebuffer_object (added to OpenGL 3.0 core)
1315 const bool hasFBO = (IsGlGreaterEqual (3, 0) || CheckExtension ("GL_ARB_framebuffer_object"))
1316 && FindProcShort (glIsRenderbuffer)
1317 && FindProcShort (glBindRenderbuffer)
1318 && FindProcShort (glDeleteRenderbuffers)
1319 && FindProcShort (glGenRenderbuffers)
1320 && FindProcShort (glRenderbufferStorage)
1321 && FindProcShort (glGetRenderbufferParameteriv)
1322 && FindProcShort (glIsFramebuffer)
1323 && FindProcShort (glBindFramebuffer)
1324 && FindProcShort (glDeleteFramebuffers)
1325 && FindProcShort (glGenFramebuffers)
1326 && FindProcShort (glCheckFramebufferStatus)
1327 && FindProcShort (glFramebufferTexture1D)
1328 && FindProcShort (glFramebufferTexture2D)
1329 && FindProcShort (glFramebufferTexture3D)
1330 && FindProcShort (glFramebufferRenderbuffer)
1331 && FindProcShort (glGetFramebufferAttachmentParameteriv)
1332 && FindProcShort (glGenerateMipmap)
1333 && FindProcShort (glBlitFramebuffer)
1334 && FindProcShort (glRenderbufferStorageMultisample)
1335 && FindProcShort (glFramebufferTextureLayer);
1337 // load GL_ARB_vertex_array_object (added to OpenGL 3.0 core)
1338 const bool hasVAO = (IsGlGreaterEqual (3, 0) || CheckExtension ("GL_ARB_vertex_array_object"))
1339 && FindProcShort (glBindVertexArray)
1340 && FindProcShort (glDeleteVertexArrays)
1341 && FindProcShort (glGenVertexArrays)
1342 && FindProcShort (glIsVertexArray);
1344 // load GL_ARB_map_buffer_range (added to OpenGL 3.0 core)
1345 const bool hasMapBufferRange = (IsGlGreaterEqual (3, 0) || CheckExtension ("GL_ARB_map_buffer_range"))
1346 && FindProcShort (glMapBufferRange)
1347 && FindProcShort (glFlushMappedBufferRange);
1349 // load OpenGL 3.0 new functions
1350 has30 = IsGlGreaterEqual (3, 0)
1353 && hasMapBufferRange
1354 && FindProcShort (glColorMaski)
1355 && FindProcShort (glGetBooleani_v)
1356 && FindProcShort (glGetIntegeri_v)
1357 && FindProcShort (glEnablei)
1358 && FindProcShort (glDisablei)
1359 && FindProcShort (glIsEnabledi)
1360 && FindProcShort (glBeginTransformFeedback)
1361 && FindProcShort (glEndTransformFeedback)
1362 && FindProcShort (glBindBufferRange)
1363 && FindProcShort (glBindBufferBase)
1364 && FindProcShort (glTransformFeedbackVaryings)
1365 && FindProcShort (glGetTransformFeedbackVarying)
1366 && FindProcShort (glClampColor)
1367 && FindProcShort (glBeginConditionalRender)
1368 && FindProcShort (glEndConditionalRender)
1369 && FindProcShort (glVertexAttribIPointer)
1370 && FindProcShort (glGetVertexAttribIiv)
1371 && FindProcShort (glGetVertexAttribIuiv)
1372 && FindProcShort (glVertexAttribI1i)
1373 && FindProcShort (glVertexAttribI2i)
1374 && FindProcShort (glVertexAttribI3i)
1375 && FindProcShort (glVertexAttribI4i)
1376 && FindProcShort (glVertexAttribI1ui)
1377 && FindProcShort (glVertexAttribI2ui)
1378 && FindProcShort (glVertexAttribI3ui)
1379 && FindProcShort (glVertexAttribI4ui)
1380 && FindProcShort (glVertexAttribI1iv)
1381 && FindProcShort (glVertexAttribI2iv)
1382 && FindProcShort (glVertexAttribI3iv)
1383 && FindProcShort (glVertexAttribI4iv)
1384 && FindProcShort (glVertexAttribI1uiv)
1385 && FindProcShort (glVertexAttribI2uiv)
1386 && FindProcShort (glVertexAttribI3uiv)
1387 && FindProcShort (glVertexAttribI4uiv)
1388 && FindProcShort (glVertexAttribI4bv)
1389 && FindProcShort (glVertexAttribI4sv)
1390 && FindProcShort (glVertexAttribI4ubv)
1391 && FindProcShort (glVertexAttribI4usv)
1392 && FindProcShort (glGetUniformuiv)
1393 && FindProcShort (glBindFragDataLocation)
1394 && FindProcShort (glGetFragDataLocation)
1395 && FindProcShort (glUniform1ui)
1396 && FindProcShort (glUniform2ui)
1397 && FindProcShort (glUniform3ui)
1398 && FindProcShort (glUniform4ui)
1399 && FindProcShort (glUniform1uiv)
1400 && FindProcShort (glUniform2uiv)
1401 && FindProcShort (glUniform3uiv)
1402 && FindProcShort (glUniform4uiv)
1403 && FindProcShort (glTexParameterIiv)
1404 && FindProcShort (glTexParameterIuiv)
1405 && FindProcShort (glGetTexParameterIiv)
1406 && FindProcShort (glGetTexParameterIuiv)
1407 && FindProcShort (glClearBufferiv)
1408 && FindProcShort (glClearBufferuiv)
1409 && FindProcShort (glClearBufferfv)
1410 && FindProcShort (glClearBufferfi)
1411 && FindProcShort (glGetStringi);
1413 // load GL_ARB_uniform_buffer_object (added to OpenGL 3.1 core)
1414 const bool hasUBO = (IsGlGreaterEqual (3, 1) || CheckExtension ("GL_ARB_uniform_buffer_object"))
1415 && FindProcShort (glGetUniformIndices)
1416 && FindProcShort (glGetActiveUniformsiv)
1417 && FindProcShort (glGetActiveUniformName)
1418 && FindProcShort (glGetUniformBlockIndex)
1419 && FindProcShort (glGetActiveUniformBlockiv)
1420 && FindProcShort (glGetActiveUniformBlockName)
1421 && FindProcShort (glUniformBlockBinding);
1423 // load GL_ARB_copy_buffer (added to OpenGL 3.1 core)
1424 const bool hasCopyBufSubData = (IsGlGreaterEqual (3, 1) || CheckExtension ("GL_ARB_copy_buffer"))
1425 && FindProcShort (glCopyBufferSubData);
1429 // NPOT textures are required by OpenGL 2.0 specifications
1430 // but doesn't hardware accelerated by some ancient OpenGL 2.1 hardware (GeForce FX, RadeOn 9700 etc.)
1431 arbNPTW = Standard_True;
1432 arbTexRG = Standard_True;
1435 // load OpenGL 3.1 new functions
1436 has31 = IsGlGreaterEqual (3, 1)
1438 && hasCopyBufSubData
1439 && FindProcShort (glDrawArraysInstanced)
1440 && FindProcShort (glDrawElementsInstanced)
1441 && FindProcShort (glTexBuffer)
1442 && FindProcShort (glPrimitiveRestartIndex);
1444 // load GL_ARB_draw_elements_base_vertex (added to OpenGL 3.2 core)
1445 const bool hasDrawElemsBaseVert = (IsGlGreaterEqual (3, 2) || CheckExtension ("GL_ARB_draw_elements_base_vertex"))
1446 && FindProcShort (glDrawElementsBaseVertex)
1447 && FindProcShort (glDrawRangeElementsBaseVertex)
1448 && FindProcShort (glDrawElementsInstancedBaseVertex)
1449 && FindProcShort (glMultiDrawElementsBaseVertex);
1451 // load GL_ARB_provoking_vertex (added to OpenGL 3.2 core)
1452 const bool hasProvokingVert = (IsGlGreaterEqual (3, 2) || CheckExtension ("GL_ARB_provoking_vertex"))
1453 && FindProcShort (glProvokingVertex);
1455 // load GL_ARB_sync (added to OpenGL 3.2 core)
1456 const bool hasSync = (IsGlGreaterEqual (3, 2) || CheckExtension ("GL_ARB_sync"))
1457 && FindProcShort (glFenceSync)
1458 && FindProcShort (glIsSync)
1459 && FindProcShort (glDeleteSync)
1460 && FindProcShort (glClientWaitSync)
1461 && FindProcShort (glWaitSync)
1462 && FindProcShort (glGetInteger64v)
1463 && FindProcShort (glGetSynciv);
1465 // load GL_ARB_texture_multisample (added to OpenGL 3.2 core)
1466 const bool hasTextureMultisample = (IsGlGreaterEqual (3, 2) || CheckExtension ("GL_ARB_texture_multisample"))
1467 && FindProcShort (glTexImage2DMultisample)
1468 && FindProcShort (glTexImage3DMultisample)
1469 && FindProcShort (glGetMultisamplefv)
1470 && FindProcShort (glSampleMaski);
1472 // load OpenGL 3.2 new functions
1473 has32 = IsGlGreaterEqual (3, 2)
1474 && hasDrawElemsBaseVert
1477 && hasTextureMultisample
1478 && FindProcShort (glGetInteger64i_v)
1479 && FindProcShort (glGetBufferParameteri64v)
1480 && FindProcShort (glFramebufferTexture);
1482 // load GL_ARB_blend_func_extended (added to OpenGL 3.3 core)
1483 const bool hasBlendFuncExtended = (IsGlGreaterEqual (3, 3) || CheckExtension ("GL_ARB_blend_func_extended"))
1484 && FindProcShort (glBindFragDataLocationIndexed)
1485 && FindProcShort (glGetFragDataIndex);
1487 // load GL_ARB_sampler_objects (added to OpenGL 3.3 core)
1488 const bool hasSamplerObjects = (IsGlGreaterEqual (3, 3) || CheckExtension ("GL_ARB_sampler_objects"))
1489 && FindProcShort (glGenSamplers)
1490 && FindProcShort (glDeleteSamplers)
1491 && FindProcShort (glIsSampler)
1492 && FindProcShort (glBindSampler)
1493 && FindProcShort (glSamplerParameteri)
1494 && FindProcShort (glSamplerParameteriv)
1495 && FindProcShort (glSamplerParameterf)
1496 && FindProcShort (glSamplerParameterfv)
1497 && FindProcShort (glSamplerParameterIiv)
1498 && FindProcShort (glSamplerParameterIuiv)
1499 && FindProcShort (glGetSamplerParameteriv)
1500 && FindProcShort (glGetSamplerParameterIiv)
1501 && FindProcShort (glGetSamplerParameterfv)
1502 && FindProcShort (glGetSamplerParameterIuiv);
1504 // load GL_ARB_timer_query (added to OpenGL 3.3 core)
1505 const bool hasTimerQuery = (IsGlGreaterEqual (3, 3) || CheckExtension ("GL_ARB_timer_query"))
1506 && FindProcShort (glQueryCounter)
1507 && FindProcShort (glGetQueryObjecti64v)
1508 && FindProcShort (glGetQueryObjectui64v);
1510 // load GL_ARB_vertex_type_2_10_10_10_rev (added to OpenGL 3.3 core)
1511 const bool hasVertType21010101rev = (IsGlGreaterEqual (3, 3) || CheckExtension ("GL_ARB_vertex_type_2_10_10_10_rev"))
1512 && FindProcShort (glVertexP2ui)
1513 && FindProcShort (glVertexP2uiv)
1514 && FindProcShort (glVertexP3ui)
1515 && FindProcShort (glVertexP3uiv)
1516 && FindProcShort (glVertexP4ui)
1517 && FindProcShort (glVertexP4uiv)
1518 && FindProcShort (glTexCoordP1ui)
1519 && FindProcShort (glTexCoordP1uiv)
1520 && FindProcShort (glTexCoordP2ui)
1521 && FindProcShort (glTexCoordP2uiv)
1522 && FindProcShort (glTexCoordP3ui)
1523 && FindProcShort (glTexCoordP3uiv)
1524 && FindProcShort (glTexCoordP4ui)
1525 && FindProcShort (glTexCoordP4uiv)
1526 && FindProcShort (glMultiTexCoordP1ui)
1527 && FindProcShort (glMultiTexCoordP1uiv)
1528 && FindProcShort (glMultiTexCoordP2ui)
1529 && FindProcShort (glMultiTexCoordP2uiv)
1530 && FindProcShort (glMultiTexCoordP3ui)
1531 && FindProcShort (glMultiTexCoordP3uiv)
1532 && FindProcShort (glMultiTexCoordP4ui)
1533 && FindProcShort (glMultiTexCoordP4uiv)
1534 && FindProcShort (glNormalP3ui)
1535 && FindProcShort (glNormalP3uiv)
1536 && FindProcShort (glColorP3ui)
1537 && FindProcShort (glColorP3uiv)
1538 && FindProcShort (glColorP4ui)
1539 && FindProcShort (glColorP4uiv)
1540 && FindProcShort (glSecondaryColorP3ui)
1541 && FindProcShort (glSecondaryColorP3uiv)
1542 && FindProcShort (glVertexAttribP1ui)
1543 && FindProcShort (glVertexAttribP1uiv)
1544 && FindProcShort (glVertexAttribP2ui)
1545 && FindProcShort (glVertexAttribP2uiv)
1546 && FindProcShort (glVertexAttribP3ui)
1547 && FindProcShort (glVertexAttribP3uiv)
1548 && FindProcShort (glVertexAttribP4ui)
1549 && FindProcShort (glVertexAttribP4uiv);
1551 // load OpenGL 3.3 extra functions
1552 has33 = IsGlGreaterEqual (3, 3)
1553 && hasBlendFuncExtended
1554 && hasSamplerObjects
1556 && hasVertType21010101rev
1557 && FindProcShort (glVertexAttribDivisor);
1559 // load GL_ARB_draw_indirect (added to OpenGL 4.0 core)
1560 const bool hasDrawIndirect = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_draw_indirect"))
1561 && FindProcShort (glDrawArraysIndirect)
1562 && FindProcShort (glDrawElementsIndirect);
1564 // load GL_ARB_gpu_shader_fp64 (added to OpenGL 4.0 core)
1565 const bool hasShaderFP64 = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_gpu_shader_fp64"))
1566 && FindProcShort (glUniform1d)
1567 && FindProcShort (glUniform2d)
1568 && FindProcShort (glUniform3d)
1569 && FindProcShort (glUniform4d)
1570 && FindProcShort (glUniform1dv)
1571 && FindProcShort (glUniform2dv)
1572 && FindProcShort (glUniform3dv)
1573 && FindProcShort (glUniform4dv)
1574 && FindProcShort (glUniformMatrix2dv)
1575 && FindProcShort (glUniformMatrix3dv)
1576 && FindProcShort (glUniformMatrix4dv)
1577 && FindProcShort (glUniformMatrix2x3dv)
1578 && FindProcShort (glUniformMatrix2x4dv)
1579 && FindProcShort (glUniformMatrix3x2dv)
1580 && FindProcShort (glUniformMatrix3x4dv)
1581 && FindProcShort (glUniformMatrix4x2dv)
1582 && FindProcShort (glUniformMatrix4x3dv)
1583 && FindProcShort (glGetUniformdv);
1585 // load GL_ARB_shader_subroutine (added to OpenGL 4.0 core)
1586 const bool hasShaderSubroutine = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_shader_subroutine"))
1587 && FindProcShort (glGetSubroutineUniformLocation)
1588 && FindProcShort (glGetSubroutineIndex)
1589 && FindProcShort (glGetActiveSubroutineUniformiv)
1590 && FindProcShort (glGetActiveSubroutineUniformName)
1591 && FindProcShort (glGetActiveSubroutineName)
1592 && FindProcShort (glUniformSubroutinesuiv)
1593 && FindProcShort (glGetUniformSubroutineuiv)
1594 && FindProcShort (glGetProgramStageiv);
1596 // load GL_ARB_tessellation_shader (added to OpenGL 4.0 core)
1597 const bool hasTessellationShader = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_tessellation_shader"))
1598 && FindProcShort (glPatchParameteri)
1599 && FindProcShort (glPatchParameterfv);
1601 // load GL_ARB_transform_feedback2 (added to OpenGL 4.0 core)
1602 const bool hasTrsfFeedback2 = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_transform_feedback2"))
1603 && FindProcShort (glBindTransformFeedback)
1604 && FindProcShort (glDeleteTransformFeedbacks)
1605 && FindProcShort (glGenTransformFeedbacks)
1606 && FindProcShort (glIsTransformFeedback)
1607 && FindProcShort (glPauseTransformFeedback)
1608 && FindProcShort (glResumeTransformFeedback)
1609 && FindProcShort (glDrawTransformFeedback);
1611 // load GL_ARB_transform_feedback3 (added to OpenGL 4.0 core)
1612 const bool hasTrsfFeedback3 = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_transform_feedback3"))
1613 && FindProcShort (glDrawTransformFeedbackStream)
1614 && FindProcShort (glBeginQueryIndexed)
1615 && FindProcShort (glEndQueryIndexed)
1616 && FindProcShort (glGetQueryIndexediv);
1618 // load OpenGL 4.0 new functions
1619 has40 = IsGlGreaterEqual (4, 0)
1622 && hasShaderSubroutine
1623 && hasTessellationShader
1626 && FindProcShort (glMinSampleShading)
1627 && FindProcShort (glBlendEquationi)
1628 && FindProcShort (glBlendEquationSeparatei)
1629 && FindProcShort (glBlendFunci)
1630 && FindProcShort (glBlendFuncSeparatei);
1632 // load GL_ARB_ES2_compatibility (added to OpenGL 4.1 core)
1633 const bool hasES2Compatibility = (IsGlGreaterEqual (4, 1) || CheckExtension ("GL_ARB_ES2_compatibility"))
1634 && FindProcShort (glReleaseShaderCompiler)
1635 && FindProcShort (glShaderBinary)
1636 && FindProcShort (glGetShaderPrecisionFormat)
1637 && FindProcShort (glDepthRangef)
1638 && FindProcShort (glClearDepthf);
1640 // load GL_ARB_get_program_binary (added to OpenGL 4.1 core)
1641 const bool hasGetProgramBinary = (IsGlGreaterEqual (4, 1) || CheckExtension ("GL_ARB_get_program_binary"))
1642 && FindProcShort (glGetProgramBinary)
1643 && FindProcShort (glProgramBinary)
1644 && FindProcShort (glProgramParameteri);
1647 // load GL_ARB_separate_shader_objects (added to OpenGL 4.1 core)
1648 const bool hasSeparateShaderObjects = (IsGlGreaterEqual (4, 1) || CheckExtension ("GL_ARB_separate_shader_objects"))
1649 && FindProcShort (glUseProgramStages)
1650 && FindProcShort (glActiveShaderProgram)
1651 && FindProcShort (glCreateShaderProgramv)
1652 && FindProcShort (glBindProgramPipeline)
1653 && FindProcShort (glDeleteProgramPipelines)
1654 && FindProcShort (glGenProgramPipelines)
1655 && FindProcShort (glIsProgramPipeline)
1656 && FindProcShort (glGetProgramPipelineiv)
1657 && FindProcShort (glProgramUniform1i)
1658 && FindProcShort (glProgramUniform1iv)
1659 && FindProcShort (glProgramUniform1f)
1660 && FindProcShort (glProgramUniform1fv)
1661 && FindProcShort (glProgramUniform1d)
1662 && FindProcShort (glProgramUniform1dv)
1663 && FindProcShort (glProgramUniform1ui)
1664 && FindProcShort (glProgramUniform1uiv)
1665 && FindProcShort (glProgramUniform2i)
1666 && FindProcShort (glProgramUniform2iv)
1667 && FindProcShort (glProgramUniform2f)
1668 && FindProcShort (glProgramUniform2fv)
1669 && FindProcShort (glProgramUniform2d)
1670 && FindProcShort (glProgramUniform2dv)
1671 && FindProcShort (glProgramUniform2ui)
1672 && FindProcShort (glProgramUniform2uiv)
1673 && FindProcShort (glProgramUniform3i)
1674 && FindProcShort (glProgramUniform3iv)
1675 && FindProcShort (glProgramUniform3f)
1676 && FindProcShort (glProgramUniform3fv)
1677 && FindProcShort (glProgramUniform3d)
1678 && FindProcShort (glProgramUniform3dv)
1679 && FindProcShort (glProgramUniform3ui)
1680 && FindProcShort (glProgramUniform3uiv)
1681 && FindProcShort (glProgramUniform4i)
1682 && FindProcShort (glProgramUniform4iv)
1683 && FindProcShort (glProgramUniform4f)
1684 && FindProcShort (glProgramUniform4fv)
1685 && FindProcShort (glProgramUniform4d)
1686 && FindProcShort (glProgramUniform4dv)
1687 && FindProcShort (glProgramUniform4ui)
1688 && FindProcShort (glProgramUniform4uiv)
1689 && FindProcShort (glProgramUniformMatrix2fv)
1690 && FindProcShort (glProgramUniformMatrix3fv)
1691 && FindProcShort (glProgramUniformMatrix4fv)
1692 && FindProcShort (glProgramUniformMatrix2dv)
1693 && FindProcShort (glProgramUniformMatrix3dv)
1694 && FindProcShort (glProgramUniformMatrix4dv)
1695 && FindProcShort (glProgramUniformMatrix2x3fv)
1696 && FindProcShort (glProgramUniformMatrix3x2fv)
1697 && FindProcShort (glProgramUniformMatrix2x4fv)
1698 && FindProcShort (glProgramUniformMatrix4x2fv)
1699 && FindProcShort (glProgramUniformMatrix3x4fv)
1700 && FindProcShort (glProgramUniformMatrix4x3fv)
1701 && FindProcShort (glProgramUniformMatrix2x3dv)
1702 && FindProcShort (glProgramUniformMatrix3x2dv)
1703 && FindProcShort (glProgramUniformMatrix2x4dv)
1704 && FindProcShort (glProgramUniformMatrix4x2dv)
1705 && FindProcShort (glProgramUniformMatrix3x4dv)
1706 && FindProcShort (glProgramUniformMatrix4x3dv)
1707 && FindProcShort (glValidateProgramPipeline)
1708 && FindProcShort (glGetProgramPipelineInfoLog);
1710 // load GL_ARB_vertex_attrib_64bit (added to OpenGL 4.1 core)
1711 const bool hasVertAttrib64bit = (IsGlGreaterEqual (4, 1) || CheckExtension ("GL_ARB_vertex_attrib_64bit"))
1712 && FindProcShort (glVertexAttribL1d)
1713 && FindProcShort (glVertexAttribL2d)
1714 && FindProcShort (glVertexAttribL3d)
1715 && FindProcShort (glVertexAttribL4d)
1716 && FindProcShort (glVertexAttribL1dv)
1717 && FindProcShort (glVertexAttribL2dv)
1718 && FindProcShort (glVertexAttribL3dv)
1719 && FindProcShort (glVertexAttribL4dv)
1720 && FindProcShort (glVertexAttribLPointer)
1721 && FindProcShort (glGetVertexAttribLdv);
1723 // load GL_ARB_viewport_array (added to OpenGL 4.1 core)
1724 const bool hasViewportArray = (IsGlGreaterEqual (4, 1) || CheckExtension ("GL_ARB_viewport_array"))
1725 && FindProcShort (glViewportArrayv)
1726 && FindProcShort (glViewportIndexedf)
1727 && FindProcShort (glViewportIndexedfv)
1728 && FindProcShort (glScissorArrayv)
1729 && FindProcShort (glScissorIndexed)
1730 && FindProcShort (glScissorIndexedv)
1731 && FindProcShort (glDepthRangeArrayv)
1732 && FindProcShort (glDepthRangeIndexed)
1733 && FindProcShort (glGetFloati_v)
1734 && FindProcShort (glGetDoublei_v);
1736 has41 = IsGlGreaterEqual (4, 1)
1737 && hasES2Compatibility
1738 && hasGetProgramBinary
1739 && hasSeparateShaderObjects
1740 && hasVertAttrib64bit
1741 && hasViewportArray;
1743 // load GL_ARB_base_instance (added to OpenGL 4.2 core)
1744 const bool hasBaseInstance = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_base_instance"))
1745 && FindProcShort (glDrawArraysInstancedBaseInstance)
1746 && FindProcShort (glDrawElementsInstancedBaseInstance)
1747 && FindProcShort (glDrawElementsInstancedBaseVertexBaseInstance);
1749 // load GL_ARB_transform_feedback_instanced (added to OpenGL 4.2 core)
1750 const bool hasTrsfFeedbackInstanced = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_transform_feedback_instanced"))
1751 && FindProcShort (glDrawTransformFeedbackInstanced)
1752 && FindProcShort (glDrawTransformFeedbackStreamInstanced);
1754 // load GL_ARB_internalformat_query (added to OpenGL 4.2 core)
1755 const bool hasInternalFormatQuery = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_internalformat_query"))
1756 && FindProcShort (glGetInternalformativ);
1758 // load GL_ARB_shader_atomic_counters (added to OpenGL 4.2 core)
1759 const bool hasShaderAtomicCounters = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_shader_atomic_counters"))
1760 && FindProcShort (glGetActiveAtomicCounterBufferiv);
1762 // load GL_ARB_shader_image_load_store (added to OpenGL 4.2 core)
1763 const bool hasShaderImgLoadStore = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_shader_image_load_store"))
1764 && FindProcShort (glBindImageTexture)
1765 && FindProcShort (glMemoryBarrier);
1767 // load GL_ARB_texture_storage (added to OpenGL 4.2 core)
1768 const bool hasTextureStorage = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_texture_storage"))
1769 && FindProcShort (glTexStorage1D)
1770 && FindProcShort (glTexStorage2D)
1771 && FindProcShort (glTexStorage3D)
1772 && FindProcShort (glTextureStorage1DEXT)
1773 && FindProcShort (glTextureStorage2DEXT)
1774 && FindProcShort (glTextureStorage3DEXT);
1776 has42 = IsGlGreaterEqual (4, 2)
1778 && hasTrsfFeedbackInstanced
1779 && hasInternalFormatQuery
1780 && hasShaderAtomicCounters
1781 && hasShaderImgLoadStore
1782 && hasTextureStorage;
1784 has43 = IsGlGreaterEqual (4, 3)
1785 && FindProcShort (glClearBufferData)
1786 && FindProcShort (glClearBufferSubData)
1787 && FindProcShort (glDispatchCompute)
1788 && FindProcShort (glDispatchComputeIndirect)
1789 && FindProcShort (glCopyImageSubData)
1790 && FindProcShort (glFramebufferParameteri)
1791 && FindProcShort (glGetFramebufferParameteriv)
1792 && FindProcShort (glGetInternalformati64v)
1793 && FindProcShort (glInvalidateTexSubImage)
1794 && FindProcShort (glInvalidateTexImage)
1795 && FindProcShort (glInvalidateBufferSubData)
1796 && FindProcShort (glInvalidateBufferData)
1797 && FindProcShort (glInvalidateFramebuffer)
1798 && FindProcShort (glInvalidateSubFramebuffer)
1799 && FindProcShort (glMultiDrawArraysIndirect)
1800 && FindProcShort (glMultiDrawElementsIndirect)
1801 && FindProcShort (glGetProgramInterfaceiv)
1802 && FindProcShort (glGetProgramResourceIndex)
1803 && FindProcShort (glGetProgramResourceName)
1804 && FindProcShort (glGetProgramResourceiv)
1805 && FindProcShort (glGetProgramResourceLocation)
1806 && FindProcShort (glGetProgramResourceLocationIndex)
1807 && FindProcShort (glShaderStorageBlockBinding)
1808 && FindProcShort (glTexBufferRange)
1809 && FindProcShort (glTexStorage2DMultisample)
1810 && FindProcShort (glTexStorage3DMultisample)
1811 && FindProcShort (glTextureView)
1812 && FindProcShort (glBindVertexBuffer)
1813 && FindProcShort (glVertexAttribFormat)
1814 && FindProcShort (glVertexAttribIFormat)
1815 && FindProcShort (glVertexAttribLFormat)
1816 && FindProcShort (glVertexAttribBinding)
1817 && FindProcShort (glVertexBindingDivisor)
1818 && FindProcShort (glDebugMessageControl)
1819 && FindProcShort (glDebugMessageInsert)
1820 && FindProcShort (glDebugMessageCallback)
1821 && FindProcShort (glGetDebugMessageLog)
1822 && FindProcShort (glPushDebugGroup)
1823 && FindProcShort (glPopDebugGroup)
1824 && FindProcShort (glObjectLabel)
1825 && FindProcShort (glGetObjectLabel)
1826 && FindProcShort (glObjectPtrLabel)
1827 && FindProcShort (glGetObjectPtrLabel);
1829 // load GL_ARB_clear_texture (added to OpenGL 4.4 core)
1830 bool arbTexClear = (IsGlGreaterEqual (4, 4) || CheckExtension ("GL_ARB_clear_texture"))
1831 && FindProcShort (glClearTexImage)
1832 && FindProcShort (glClearTexSubImage);
1834 has44 = IsGlGreaterEqual (4, 4)
1836 && FindProcShort (glBufferStorage)
1837 && FindProcShort (glBindBuffersBase)
1838 && FindProcShort (glBindBuffersRange)
1839 && FindProcShort (glBindTextures)
1840 && FindProcShort (glBindSamplers)
1841 && FindProcShort (glBindImageTextures)
1842 && FindProcShort (glBindVertexBuffers);
1844 // initialize TBO extension (ARB)
1846 && CheckExtension ("GL_ARB_texture_buffer_object")
1847 && FindProc ("glTexBufferARB", myFuncs->glTexBuffer))
1849 arbTBO = (OpenGl_ArbTBO* )(&(*myFuncs));
1851 arbTboRGB32 = CheckExtension ("GL_ARB_texture_buffer_object_rgb32");
1853 // initialize hardware instancing extension (ARB)
1855 && CheckExtension ("GL_ARB_draw_instanced")
1856 && FindProc ("glDrawArraysInstancedARB", myFuncs->glDrawArraysInstanced)
1857 && FindProc ("glDrawElementsInstancedARB", myFuncs->glDrawElementsInstanced))
1859 arbIns = (OpenGl_ArbIns* )(&(*myFuncs));
1862 // initialize FBO extension (ARB)
1865 arbFBO = (OpenGl_ArbFBO* )(&(*myFuncs));
1866 arbFBOBlit = (OpenGl_ArbFBOBlit* )(&(*myFuncs));
1867 extPDS = Standard_True; // extension for EXT, but part of ARB
1870 // initialize GS extension (EXT)
1871 if (CheckExtension ("GL_EXT_geometry_shader4")
1872 && FindProcShort (glProgramParameteriEXT))
1874 extGS = (OpenGl_ExtGS* )(&(*myFuncs));
1877 // initialize bindless texture extension (ARB)
1878 if (CheckExtension ("GL_ARB_bindless_texture")
1879 && FindProcShort (glGetTextureHandleARB)
1880 && FindProcShort (glGetTextureSamplerHandleARB)
1881 && FindProcShort (glMakeTextureHandleResidentARB)
1882 && FindProcShort (glMakeTextureHandleNonResidentARB)
1883 && FindProcShort (glGetImageHandleARB)
1884 && FindProcShort (glMakeImageHandleResidentARB)
1885 && FindProcShort (glMakeImageHandleNonResidentARB)
1886 && FindProcShort (glUniformHandleui64ARB)
1887 && FindProcShort (glUniformHandleui64vARB)
1888 && FindProcShort (glProgramUniformHandleui64ARB)
1889 && FindProcShort (glProgramUniformHandleui64vARB)
1890 && FindProcShort (glIsTextureHandleResidentARB)
1891 && FindProcShort (glIsImageHandleResidentARB)
1892 && FindProcShort (glVertexAttribL1ui64ARB)
1893 && FindProcShort (glVertexAttribL1ui64vARB)
1894 && FindProcShort (glGetVertexAttribLui64vARB))
1896 arbTexBindless = (OpenGl_ArbTexBindless* )(&(*myFuncs));
1925 core15 = (OpenGl_GlCore15* )(&(*myFuncs));
1927 core15fwd = (OpenGl_GlCore15Fwd* )(&(*myFuncs));
1938 core20 = (OpenGl_GlCore20* )(&(*myFuncs));
1940 core20fwd = (OpenGl_GlCore20Fwd* )(&(*myFuncs));
1962 arbTBO = (OpenGl_ArbTBO* )(&(*myFuncs));
1963 arbIns = (OpenGl_ArbIns* )(&(*myFuncs));
1971 core32 = (OpenGl_GlCore32* )(&(*myFuncs));
1974 core32->glGenVertexArrays (1, &myDefaultVao);
1978 core32back = (OpenGl_GlCore32Back* )(&(*myFuncs));
1987 core33 = (OpenGl_GlCore33* )(&(*myFuncs));
1990 core33back = (OpenGl_GlCore33Back* )(&(*myFuncs));
1993 // initialize sampler object
1994 myTexSampler = new OpenGl_Sampler();
1995 myTexSampler->Init (*this);
2003 arbTboRGB32 = Standard_True; // in core since OpenGL 4.0
2011 core41 = (OpenGl_GlCore41* )(&(*myFuncs));
2014 core41back = (OpenGl_GlCore41Back* )(&(*myFuncs));
2023 core42 = (OpenGl_GlCore42* )(&(*myFuncs));
2026 core42back = (OpenGl_GlCore42Back* )(&(*myFuncs));
2035 core43 = (OpenGl_GlCore43* )(&(*myFuncs));
2038 core43back = (OpenGl_GlCore43Back* )(&(*myFuncs));
2047 core44 = (OpenGl_GlCore44* )(&(*myFuncs));
2050 core44back = (OpenGl_GlCore44Back* )(&(*myFuncs));
2055 // =======================================================================
2056 // function : MemoryInfo
2058 // =======================================================================
2059 Standard_Size OpenGl_Context::AvailableMemory() const
2061 #if !defined(GL_ES_VERSION_2_0)
2064 // this is actually information for VBO pool
2065 // however because pools are mostly shared
2066 // it can be used for total GPU memory estimations
2069 glGetIntegerv (GL_VBO_FREE_MEMORY_ATI, aMemInfo);
2070 // returned value is in KiB, however this maybe changed in future
2071 return Standard_Size(aMemInfo[0]) * 1024;
2075 // current available dedicated video memory (in KiB), currently unused GPU memory
2077 glGetIntegerv (GL_GPU_MEMORY_INFO_CURRENT_AVAILABLE_VIDMEM_NVX, &aMemInfo);
2078 return Standard_Size(aMemInfo) * 1024;
2084 // =======================================================================
2085 // function : MemoryInfo
2087 // =======================================================================
2088 TCollection_AsciiString OpenGl_Context::MemoryInfo() const
2090 TCollection_AsciiString anInfo;
2091 #if !defined(GL_ES_VERSION_2_0)
2095 memset (aValues, 0, sizeof(aValues));
2096 glGetIntegerv (GL_VBO_FREE_MEMORY_ATI, aValues);
2098 // total memory free in the pool
2099 anInfo += TCollection_AsciiString (" GPU free memory: ") + (aValues[0] / 1024) + " MiB\n";
2101 // largest available free block in the pool
2102 anInfo += TCollection_AsciiString (" Largest free block: ") + (aValues[1] / 1024) + " MiB\n";
2103 if (aValues[2] != aValues[0])
2105 // total auxiliary memory free
2106 anInfo += TCollection_AsciiString (" Free memory: ") + (aValues[2] / 1024) + " MiB\n";
2111 //current available dedicated video memory (in KiB), currently unused GPU memory
2113 glGetIntegerv (GL_GPU_MEMORY_INFO_CURRENT_AVAILABLE_VIDMEM_NVX, &aValue);
2114 anInfo += TCollection_AsciiString (" GPU free memory: ") + (aValue / 1024) + " MiB\n";
2116 // dedicated video memory, total size (in KiB) of the GPU memory
2117 GLint aDedicated = 0;
2118 glGetIntegerv (GL_GPU_MEMORY_INFO_DEDICATED_VIDMEM_NVX, &aDedicated);
2119 anInfo += TCollection_AsciiString (" GPU memory: ") + (aDedicated / 1024) + " MiB\n";
2121 // total available memory, total size (in KiB) of the memory available for allocations
2122 glGetIntegerv (GL_GPU_MEMORY_INFO_TOTAL_AVAILABLE_MEMORY_NVX, &aValue);
2123 if (aValue != aDedicated)
2125 // different only for special configurations
2126 anInfo += TCollection_AsciiString (" Total memory: ") + (aValue / 1024) + " MiB\n";
2134 // =======================================================================
2135 // function : GetResource
2137 // =======================================================================
2138 const Handle(OpenGl_Resource)& OpenGl_Context::GetResource (const TCollection_AsciiString& theKey) const
2140 return mySharedResources->IsBound (theKey) ? mySharedResources->Find (theKey) : NULL_GL_RESOURCE;
2143 // =======================================================================
2144 // function : ShareResource
2146 // =======================================================================
2147 Standard_Boolean OpenGl_Context::ShareResource (const TCollection_AsciiString& theKey,
2148 const Handle(OpenGl_Resource)& theResource)
2150 if (theKey.IsEmpty() || theResource.IsNull())
2152 return Standard_False;
2154 return mySharedResources->Bind (theKey, theResource);
2157 // =======================================================================
2158 // function : ReleaseResource
2160 // =======================================================================
2161 void OpenGl_Context::ReleaseResource (const TCollection_AsciiString& theKey,
2162 const Standard_Boolean theToDelay)
2164 if (!mySharedResources->IsBound (theKey))
2168 const Handle(OpenGl_Resource)& aRes = mySharedResources->Find (theKey);
2169 if (aRes->GetRefCount() > 1)
2176 myDelayed->Bind (theKey, 1);
2180 aRes->Release (this);
2181 mySharedResources->UnBind (theKey);
2185 // =======================================================================
2186 // function : DelayedRelease
2188 // =======================================================================
2189 void OpenGl_Context::DelayedRelease (Handle(OpenGl_Resource)& theResource)
2191 myUnusedResources->Prepend (theResource);
2192 theResource.Nullify();
2195 // =======================================================================
2196 // function : ReleaseDelayed
2198 // =======================================================================
2199 void OpenGl_Context::ReleaseDelayed()
2201 // release queued elements
2202 while (!myUnusedResources->IsEmpty())
2204 myUnusedResources->First()->Release (this);
2205 myUnusedResources->RemoveFirst();
2208 // release delayed shared resources
2209 NCollection_Vector<TCollection_AsciiString> aDeadList;
2210 for (NCollection_DataMap<TCollection_AsciiString, Standard_Integer>::Iterator anIter (*myDelayed);
2211 anIter.More(); anIter.Next())
2213 if (++anIter.ChangeValue() <= 2)
2215 continue; // postpone release one more frame to ensure noone use it periodically
2218 const TCollection_AsciiString& aKey = anIter.Key();
2219 if (!mySharedResources->IsBound (aKey))
2221 // mixed unshared strategy delayed/undelayed was used!
2222 aDeadList.Append (aKey);
2226 Handle(OpenGl_Resource)& aRes = mySharedResources->ChangeFind (aKey);
2227 if (aRes->GetRefCount() > 1)
2229 // should be only 1 instance in mySharedResources
2230 // if not - resource was reused again
2231 aDeadList.Append (aKey);
2235 // release resource if no one requiested it more than 2 redraw calls
2236 aRes->Release (this);
2237 mySharedResources->UnBind (aKey);
2238 aDeadList.Append (aKey);
2241 for (Standard_Integer anIter = 0; anIter < aDeadList.Length(); ++anIter)
2243 myDelayed->UnBind (aDeadList.Value (anIter));
2247 // =======================================================================
2248 // function : BindProgram
2250 // =======================================================================
2251 Standard_Boolean OpenGl_Context::BindProgram (const Handle(OpenGl_ShaderProgram)& theProgram)
2253 if (core20fwd == NULL)
2255 return Standard_False;
2258 if (theProgram.IsNull()
2259 || !theProgram->IsValid())
2261 if (!myActiveProgram.IsNull())
2263 core20fwd->glUseProgram (OpenGl_ShaderProgram::NO_PROGRAM);
2264 myActiveProgram.Nullify();
2266 return Standard_False;
2269 myActiveProgram = theProgram;
2270 core20fwd->glUseProgram (theProgram->ProgramId());
2271 return Standard_True;
2274 // =======================================================================
2275 // function : BindDefaultVao
2277 // =======================================================================
2278 void OpenGl_Context::BindDefaultVao()
2280 #if !defined(GL_ES_VERSION_2_0)
2281 if (myDefaultVao == 0
2287 core32->glBindVertexArray (myDefaultVao);
2291 // =======================================================================
2292 // function : SetColor4fv
2294 // =======================================================================
2295 void OpenGl_Context::SetColor4fv (const OpenGl_Vec4& theColor)
2297 if (!myActiveProgram.IsNull())
2299 myActiveProgram->SetUniform (this, myActiveProgram->GetStateLocation (OpenGl_OCCT_COLOR), theColor);
2301 #if !defined(GL_ES_VERSION_2_0)
2302 else if (core11 != NULL)
2304 core11->glColor4fv (theColor.GetData());
2309 // =======================================================================
2310 // function : SetPointSize
2312 // =======================================================================
2313 void OpenGl_Context::SetPointSize (const Standard_ShortReal theSize)
2315 if (!myActiveProgram.IsNull())
2317 myActiveProgram->SetUniform (this, myActiveProgram->GetStateLocation (OpenGl_OCCT_POINT_SIZE), theSize);
2318 #if !defined(GL_ES_VERSION_2_0)
2319 //myContext->core11fwd->glEnable (GL_VERTEX_PROGRAM_POINT_SIZE);
2322 #if !defined(GL_ES_VERSION_2_0)
2325 core11fwd->glPointSize (theSize);
2326 if (core20fwd != NULL)
2328 //myContext->core11fwd->glDisable (GL_VERTEX_PROGRAM_POINT_SIZE);
2334 // =======================================================================
2335 // function : SetGlNormalizeEnabled
2337 // =======================================================================
2338 Standard_Boolean OpenGl_Context::SetGlNormalizeEnabled (Standard_Boolean isEnabled)
2340 if (isEnabled == myIsGlNormalizeEnabled)
2342 return myIsGlNormalizeEnabled;
2345 Standard_Boolean anOldGlNormalize = myIsGlNormalizeEnabled;
2347 myIsGlNormalizeEnabled = isEnabled;
2349 #if !defined(GL_ES_VERSION_2_0)
2352 glEnable (GL_NORMALIZE);
2356 glDisable (GL_NORMALIZE);
2360 return anOldGlNormalize;
2363 // =======================================================================
2364 // function : ApplyModelWorldMatrix
2366 // =======================================================================
2367 void OpenGl_Context::ApplyModelWorldMatrix()
2369 #if !defined(GL_ES_VERSION_2_0)
2372 core11->glMatrixMode (GL_MODELVIEW);
2373 core11->glLoadMatrixf (ModelWorldState.Current());
2377 if (!myShaderManager->IsEmpty())
2379 myShaderManager->UpdateModelWorldStateTo (ModelWorldState.Current());
2383 // =======================================================================
2384 // function : ApplyWorldViewMatrix
2386 // =======================================================================
2387 void OpenGl_Context::ApplyWorldViewMatrix()
2389 #if !defined(GL_ES_VERSION_2_0)
2392 core11->glMatrixMode (GL_MODELVIEW);
2393 core11->glLoadMatrixf (WorldViewState.Current());
2397 if (!myShaderManager->IsEmpty())
2399 myShaderManager->UpdateWorldViewStateTo (WorldViewState.Current());
2403 // =======================================================================
2404 // function : ApplyModelViewMatrix
2406 // =======================================================================
2407 void OpenGl_Context::ApplyModelViewMatrix()
2409 #if !defined(GL_ES_VERSION_2_0)
2412 OpenGl_Mat4 aModelView = WorldViewState.Current() * ModelWorldState.Current();
2413 core11->glMatrixMode (GL_MODELVIEW);
2414 core11->glLoadMatrixf (aModelView.GetData());
2418 if (!myShaderManager->IsEmpty())
2420 myShaderManager->UpdateModelWorldStateTo (ModelWorldState.Current());
2421 myShaderManager->UpdateWorldViewStateTo (WorldViewState.Current());
2425 // =======================================================================
2426 // function : ApplyProjectionMatrix
2428 // =======================================================================
2429 void OpenGl_Context::ApplyProjectionMatrix()
2431 #if !defined(GL_ES_VERSION_2_0)
2434 core11->glMatrixMode (GL_PROJECTION);
2435 core11->glLoadMatrixf (ProjectionState.Current().GetData());
2439 if (!myShaderManager->IsEmpty())
2441 myShaderManager->UpdateProjectionStateTo (ProjectionState.Current());