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 arbNPTW(Standard_False),
97 extBgra(Standard_False),
98 extAnis(Standard_False),
99 extPDS (Standard_False),
100 atiMem (Standard_False),
101 nvxMem (Standard_False),
102 mySharedResources (new OpenGl_ResourcesMap()),
103 myDelayed (new OpenGl_DelayReleaseMap()),
104 myUnusedResources (new OpenGl_ResourcesStack()),
106 myGlLibHandle (NULL),
107 myFuncs (new OpenGl_GlFunctions()),
113 myRenderMode (GL_RENDER),
114 myIsInitialized (Standard_False),
115 myIsStereoBuffers (Standard_False),
118 #if defined(MAC_OS_X_VERSION_10_3) && !defined(MACOSX_USE_GLX)
119 // Vendors can not extend functionality on this system
120 // and developers are limited to OpenGL support provided by Mac OS X SDK.
121 // We retrieve function pointers from system library
122 // to generalize extensions support on all platforms.
123 // In this way we also reach binary compatibility benefit between OS releases
124 // if some newest functionality is optionally used.
125 // Notice that GL version / extension availability checks are required
126 // because function pointers may be available but not functionality itself
127 // (depends on renderer).
128 myGlLibHandle = dlopen ("/System/Library/Frameworks/OpenGL.framework/Versions/Current/OpenGL", RTLD_LAZY);
130 memset (myFuncs.operator->(), 0, sizeof(OpenGl_GlFunctions));
131 myShaderManager = new OpenGl_ShaderManager (this);
134 // =======================================================================
135 // function : ~OpenGl_Context
137 // =======================================================================
138 OpenGl_Context::~OpenGl_Context()
140 // release clean up queue
143 // release shared resources if any
144 if (((const Handle(Standard_Transient)& )mySharedResources)->GetRefCount() <= 1)
146 myShaderManager.Nullify();
147 for (NCollection_DataMap<TCollection_AsciiString, Handle(OpenGl_Resource)>::Iterator anIter (*mySharedResources);
148 anIter.More(); anIter.Next())
150 anIter.Value()->Release (this);
155 myShaderManager->SetContext (NULL);
157 mySharedResources.Nullify();
161 && caps->contextDebug
166 glGetPointerv (GL_DEBUG_CALLBACK_USER_PARAM_ARB, &aPtr);
169 arbDbg->glDebugMessageCallbackARB (NULL, NULL);
174 // =======================================================================
175 // function : MaxDegreeOfAnisotropy
177 // =======================================================================
178 Standard_Integer OpenGl_Context::MaxDegreeOfAnisotropy() const
183 // =======================================================================
184 // function : MaxTextureSize
186 // =======================================================================
187 Standard_Integer OpenGl_Context::MaxTextureSize() const
192 // =======================================================================
193 // function : MaxClipPlanes
195 // =======================================================================
196 Standard_Integer OpenGl_Context::MaxClipPlanes() const
198 return myMaxClipPlanes;
201 // =======================================================================
202 // function : SetDrawBufferLeft
204 // =======================================================================
205 void OpenGl_Context::SetDrawBufferLeft()
207 switch (myDrawBuffer)
211 glDrawBuffer (GL_BACK_LEFT);
212 myDrawBuffer = GL_BACK_LEFT;
215 case GL_FRONT_RIGHT :
217 glDrawBuffer (GL_FRONT_LEFT);
218 myDrawBuffer = GL_FRONT_LEFT;
221 case GL_FRONT_AND_BACK :
223 glDrawBuffer (GL_LEFT);
224 myDrawBuffer = GL_LEFT;
229 // =======================================================================
230 // function : SetDrawBufferRight
232 // =======================================================================
233 void OpenGl_Context::SetDrawBufferRight()
235 switch (myDrawBuffer)
239 glDrawBuffer (GL_BACK_RIGHT);
240 myDrawBuffer = GL_BACK_RIGHT;
245 glDrawBuffer (GL_FRONT_RIGHT);
246 myDrawBuffer = GL_FRONT_RIGHT;
249 case GL_FRONT_AND_BACK :
251 glDrawBuffer (GL_RIGHT);
252 myDrawBuffer = GL_RIGHT;
257 // =======================================================================
258 // function : SetDrawBufferMono
260 // =======================================================================
261 void OpenGl_Context::SetDrawBufferMono()
263 switch (myDrawBuffer)
267 glDrawBuffer (GL_BACK);
268 myDrawBuffer = GL_BACK;
272 case GL_FRONT_RIGHT :
273 glDrawBuffer (GL_FRONT);
274 myDrawBuffer = GL_FRONT;
279 glDrawBuffer (GL_FRONT_AND_BACK);
280 myDrawBuffer = GL_FRONT_AND_BACK;
285 // =======================================================================
286 // function : FetchState
288 // =======================================================================
289 void OpenGl_Context::FetchState()
291 // cache feedback mode state
292 glGetIntegerv (GL_RENDER_MODE, &myRenderMode);
294 // cache draw buffer state
295 glGetIntegerv (GL_DRAW_BUFFER, &myDrawBuffer);
298 // =======================================================================
301 // =======================================================================
302 void OpenGl_Context::Share (const Handle(OpenGl_Context)& theShareCtx)
304 if (!theShareCtx.IsNull())
306 mySharedResources = theShareCtx->mySharedResources;
307 myDelayed = theShareCtx->myDelayed;
308 myUnusedResources = theShareCtx->myUnusedResources;
309 myShaderManager = theShareCtx->myShaderManager;
313 #if !defined(__APPLE__) || defined(MACOSX_USE_GLX)
315 // =======================================================================
316 // function : IsCurrent
318 // =======================================================================
319 Standard_Boolean OpenGl_Context::IsCurrent() const
321 #if defined(HAVE_EGL)
322 if ((EGLDisplay )myDisplay == EGL_NO_DISPLAY
323 || (EGLSurface )myWindow == EGL_NO_SURFACE
324 || (EGLContext )myGContext == EGL_NO_CONTEXT)
326 return Standard_False;
329 return (((EGLDisplay )myDisplay == eglGetCurrentDisplay())
330 && ((EGLContext )myGContext == eglGetCurrentContext())
331 && ((EGLSurface )myWindow == eglGetCurrentSurface (EGL_DRAW)));
332 #elif defined(_WIN32)
333 if (myWindowDC == NULL || myGContext == NULL)
335 return Standard_False;
337 return (( (HDC )myWindowDC == wglGetCurrentDC())
338 && ((HGLRC )myGContext == wglGetCurrentContext()));
340 if (myDisplay == NULL || myWindow == 0 || myGContext == 0)
342 return Standard_False;
345 return ( ((Display* )myDisplay == glXGetCurrentDisplay())
346 && ((GLXContext )myGContext == glXGetCurrentContext())
347 && ((GLXDrawable )myWindow == glXGetCurrentDrawable()));
351 // =======================================================================
352 // function : MakeCurrent
354 // =======================================================================
355 Standard_Boolean OpenGl_Context::MakeCurrent()
357 #if defined(HAVE_EGL)
358 if ((EGLDisplay )myDisplay == EGL_NO_DISPLAY
359 || (EGLSurface )myWindow == EGL_NO_SURFACE
360 || (EGLContext )myGContext == EGL_NO_CONTEXT)
362 Standard_ProgramError_Raise_if (myIsInitialized, "OpenGl_Context::Init() should be called before!");
363 return Standard_False;
366 if (eglMakeCurrent ((EGLDisplay )myDisplay, (EGLSurface )myWindow, (EGLSurface )myWindow, (EGLContext )myGContext) != EGL_TRUE)
368 // if there is no current context it might be impossible to use glGetError() correctly
369 PushMessage (GL_DEBUG_SOURCE_WINDOW_SYSTEM_ARB, GL_DEBUG_TYPE_ERROR_ARB, 0, GL_DEBUG_SEVERITY_HIGH_ARB,
370 "eglMakeCurrent() has failed!");
371 myIsInitialized = Standard_False;
372 return Standard_False;
374 #elif defined(_WIN32)
375 if (myWindowDC == NULL || myGContext == NULL)
377 Standard_ProgramError_Raise_if (myIsInitialized, "OpenGl_Context::Init() should be called before!");
378 return Standard_False;
381 // technically it should be safe to activate already bound GL context
382 // however some drivers (Intel etc.) may FAIL doing this for unknown reason
385 myShaderManager->SetContext (this);
386 return Standard_True;
388 else if (wglMakeCurrent ((HDC )myWindowDC, (HGLRC )myGContext) != TRUE)
390 // notice that glGetError() couldn't be used here!
391 wchar_t* aMsgBuff = NULL;
392 DWORD anErrorCode = GetLastError();
393 FormatMessageW (FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
394 NULL, anErrorCode, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (wchar_t* )&aMsgBuff, 0, NULL);
395 TCollection_ExtendedString aMsg ("wglMakeCurrent() has failed. ");
396 if (aMsgBuff != NULL)
398 aMsg += (Standard_ExtString )aMsgBuff;
399 LocalFree (aMsgBuff);
401 PushMessage (GL_DEBUG_SOURCE_WINDOW_SYSTEM_ARB, GL_DEBUG_TYPE_ERROR_ARB, (unsigned int )anErrorCode, GL_DEBUG_SEVERITY_HIGH_ARB, aMsg);
402 myIsInitialized = Standard_False;
403 return Standard_False;
406 if (myDisplay == NULL || myWindow == 0 || myGContext == 0)
408 Standard_ProgramError_Raise_if (myIsInitialized, "OpenGl_Context::Init() should be called before!");
409 return Standard_False;
412 if (!glXMakeCurrent ((Display* )myDisplay, (GLXDrawable )myWindow, (GLXContext )myGContext))
414 // if there is no current context it might be impossible to use glGetError() correctly
415 PushMessage (GL_DEBUG_SOURCE_WINDOW_SYSTEM_ARB, GL_DEBUG_TYPE_ERROR_ARB, 0, GL_DEBUG_SEVERITY_HIGH_ARB,
416 "glXMakeCurrent() has failed!");
417 myIsInitialized = Standard_False;
418 return Standard_False;
421 myShaderManager->SetContext (this);
422 return Standard_True;
425 // =======================================================================
426 // function : SwapBuffers
428 // =======================================================================
429 void OpenGl_Context::SwapBuffers()
431 #if defined(HAVE_EGL)
432 if ((EGLSurface )myWindow != EGL_NO_SURFACE)
434 eglSwapBuffers ((EGLDisplay )myDisplay, (EGLSurface )myWindow);
436 #elif defined(_WIN32)
437 if ((HDC )myWindowDC != NULL)
439 ::SwapBuffers ((HDC )myWindowDC);
443 if ((Display* )myDisplay != NULL)
445 glXSwapBuffers ((Display* )myDisplay, (GLXDrawable )myWindow);
452 // =======================================================================
453 // function : findProc
455 // =======================================================================
456 void* OpenGl_Context::findProc (const char* theFuncName)
458 #if defined(HAVE_EGL)
459 return (void* )eglGetProcAddress (theFuncName);
460 #elif defined(_WIN32)
461 return wglGetProcAddress (theFuncName);
462 #elif defined(__APPLE__) && !defined(MACOSX_USE_GLX)
463 return (myGlLibHandle != NULL) ? dlsym (myGlLibHandle, theFuncName) : NULL;
465 return (void* )glXGetProcAddress ((const GLubyte* )theFuncName);
469 // =======================================================================
470 // function : CheckExtension
472 // =======================================================================
473 Standard_Boolean OpenGl_Context::CheckExtension (const char* theExtName) const
475 if (theExtName == NULL)
477 std::cerr << "CheckExtension called with NULL string!\n";
478 return Standard_False;
481 // available since OpenGL 3.0
482 // and the ONLY way to check extensions with OpenGL 3.1+ core profile
483 /**if (IsGlGreaterEqual (3, 0))
486 glGetIntegerv (GL_NUM_EXTENSIONS, &anExtNb);
487 for (GLint anIter = 0; anIter < anExtNb; ++anIter)
489 const char* anExtension = (const char* )core30->glGetStringi (GL_EXTENSIONS, (GLuint )anIter);
490 if (anExtension[anExtNameLen] == '\0' &&
491 strncmp (anExtension, theExtName, anExtNameLen) == 0)
493 return Standard_True;
496 return Standard_False;
499 // use old way with huge string for all extensions
500 const char* anExtString = (const char* )glGetString (GL_EXTENSIONS);
501 if (anExtString == NULL)
503 Messenger()->Send ("TKOpenGL: glGetString (GL_EXTENSIONS) has returned NULL! No GL context?", Message_Warning);
504 return Standard_False;
506 return CheckExtension (anExtString, theExtName);
509 // =======================================================================
510 // function : CheckExtension
512 // =======================================================================
513 Standard_Boolean OpenGl_Context::CheckExtension (const char* theExtString,
514 const char* theExtName)
516 if (theExtString == NULL)
518 return Standard_False;
521 // Search for theExtName in the extensions string.
522 // Use of strstr() is not sufficient because extension names can be prefixes of other extension names.
523 char* aPtrIter = (char* )theExtString;
524 const char* aPtrEnd = aPtrIter + strlen (theExtString);
525 const size_t anExtNameLen = strlen (theExtName);
526 while (aPtrIter < aPtrEnd)
528 const size_t n = strcspn (aPtrIter, " ");
529 if ((n == anExtNameLen) && (strncmp (aPtrIter, theExtName, anExtNameLen) == 0))
531 return Standard_True;
535 return Standard_False;
538 #if !defined(__APPLE__) || defined(MACOSX_USE_GLX)
540 // =======================================================================
543 // =======================================================================
544 Standard_Boolean OpenGl_Context::Init()
548 return Standard_True;
551 #if defined(HAVE_EGL)
552 myDisplay = (Aspect_Display )eglGetCurrentDisplay();
553 myGContext = (Aspect_RenderingContext )eglGetCurrentContext();
554 myWindow = (Aspect_Drawable )eglGetCurrentSurface(EGL_DRAW);
555 #elif defined(_WIN32)
556 myWindowDC = (Aspect_Handle )wglGetCurrentDC();
557 myGContext = (Aspect_RenderingContext )wglGetCurrentContext();
559 myDisplay = (Aspect_Display )glXGetCurrentDisplay();
560 myGContext = (Aspect_RenderingContext )glXGetCurrentContext();
561 myWindow = (Aspect_Drawable )glXGetCurrentDrawable();
563 if (myGContext == NULL)
565 return Standard_False;
569 myIsInitialized = Standard_True;
570 return Standard_True;
575 // =======================================================================
578 // =======================================================================
579 #if defined(HAVE_EGL)
580 Standard_Boolean OpenGl_Context::Init (const Aspect_Drawable theEglSurface,
581 const Aspect_Display theEglDisplay,
582 const Aspect_RenderingContext theEglContext)
583 #elif defined(_WIN32)
584 Standard_Boolean OpenGl_Context::Init (const Aspect_Handle theWindow,
585 const Aspect_Handle theWindowDC,
586 const Aspect_RenderingContext theGContext)
587 #elif defined(__APPLE__) && !defined(MACOSX_USE_GLX)
588 Standard_Boolean OpenGl_Context::Init (const void* theGContext)
590 Standard_Boolean OpenGl_Context::Init (const Aspect_Drawable theWindow,
591 const Aspect_Display theDisplay,
592 const Aspect_RenderingContext theGContext)
595 Standard_ProgramError_Raise_if (myIsInitialized, "OpenGl_Context::Init() should be called only once!");
596 #if defined(HAVE_EGL)
597 myWindow = theEglSurface;
598 myGContext = theEglContext;
599 myDisplay = theEglDisplay;
600 #elif defined(_WIN32)
601 myWindow = theWindow;
602 myGContext = theGContext;
603 myWindowDC = theWindowDC;
604 #elif defined(__APPLE__) && !defined(MACOSX_USE_GLX)
605 myGContext = (void* )theGContext;
607 myWindow = theWindow;
608 myGContext = theGContext;
609 myDisplay = theDisplay;
611 if (myGContext == NULL || !MakeCurrent())
613 return Standard_False;
617 myIsInitialized = Standard_True;
618 return Standard_True;
621 // =======================================================================
622 // function : ResetErrors
624 // =======================================================================
625 void OpenGl_Context::ResetErrors()
627 while (glGetError() != GL_NO_ERROR)
633 // =======================================================================
634 // function : readGlVersion
636 // =======================================================================
637 void OpenGl_Context::readGlVersion()
643 // available since OpenGL 3.0
644 GLint aMajor = 0, aMinor = 0;
645 glGetIntegerv (GL_MAJOR_VERSION, &aMajor);
646 glGetIntegerv (GL_MINOR_VERSION, &aMinor);
647 // glGetError() sometimes does not report an error here even if
648 // GL does not know GL_MAJOR_VERSION and GL_MINOR_VERSION constants.
649 // This happens on some rendereres like e.g. Cygwin MESA.
650 // Thus checking additionally if GL has put anything to
651 // the output variables.
652 if (glGetError() == GL_NO_ERROR && aMajor != 0 && aMinor != 0)
654 myGlVerMajor = aMajor;
655 myGlVerMinor = aMinor;
660 // Read version string.
661 // Notice that only first two numbers splitted by point '2.1 XXXXX' are significant.
662 // Following trash (after space) is vendor-specific.
663 // New drivers also returns micro version of GL like '3.3.0' which has no meaning
664 // and should be considered as vendor-specific too.
665 const char* aVerStr = (const char* )glGetString (GL_VERSION);
666 if (aVerStr == NULL || *aVerStr == '\0')
668 // invalid GL context
672 // parse string for major number
676 while (aVerStr[aMajIter] >= '0' && aVerStr[aMajIter] <= '9')
680 if (aMajIter == 0 || aMajIter >= sizeof(aMajorStr))
684 memcpy (aMajorStr, aVerStr, aMajIter);
685 aMajorStr[aMajIter] = '\0';
687 // parse string for minor number
688 aVerStr += aMajIter + 1;
690 while (aVerStr[aMinIter] >= '0' && aVerStr[aMinIter] <= '9')
694 if (aMinIter == 0 || aMinIter >= sizeof(aMinorStr))
698 memcpy (aMinorStr, aVerStr, aMinIter);
699 aMinorStr[aMinIter] = '\0';
702 myGlVerMajor = atoi (aMajorStr);
703 myGlVerMinor = atoi (aMinorStr);
705 if (myGlVerMajor <= 0)
712 static Standard_CString THE_DBGMSG_UNKNOWN = "UNKNOWN";
713 static Standard_CString THE_DBGMSG_SOURCES[] =
715 ".OpenGL", // GL_DEBUG_SOURCE_API_ARB
716 ".WinSystem", // GL_DEBUG_SOURCE_WINDOW_SYSTEM_ARB
717 ".GLSL", // GL_DEBUG_SOURCE_SHADER_COMPILER_ARB
718 ".3rdParty", // GL_DEBUG_SOURCE_THIRD_PARTY_ARB
719 "", // GL_DEBUG_SOURCE_APPLICATION_ARB
720 ".Other" // GL_DEBUG_SOURCE_OTHER_ARB
723 static Standard_CString THE_DBGMSG_TYPES[] =
725 "Error", // GL_DEBUG_TYPE_ERROR_ARB
726 "Deprecated", // GL_DEBUG_TYPE_DEPRECATED_BEHAVIOR_ARB
727 "Undef. behavior", // GL_DEBUG_TYPE_UNDEFINED_BEHAVIOR_ARB
728 "Portability", // GL_DEBUG_TYPE_PORTABILITY_ARB
729 "Performance", // GL_DEBUG_TYPE_PERFORMANCE_ARB
730 "Other" // GL_DEBUG_TYPE_OTHER_ARB
733 static Standard_CString THE_DBGMSG_SEV_HIGH = "High"; // GL_DEBUG_SEVERITY_HIGH_ARB
734 static Standard_CString THE_DBGMSG_SEV_MEDIUM = "Medium"; // GL_DEBUG_SEVERITY_MEDIUM_ARB
735 static Standard_CString THE_DBGMSG_SEV_LOW = "Low"; // GL_DEBUG_SEVERITY_LOW_ARB
737 //! Callback for GL_ARB_debug_output extension
738 static void APIENTRY debugCallbackWrap(unsigned int theSource,
739 unsigned int theType,
741 unsigned int theSeverity,
743 const char* theMessage,
744 const void* theUserParam)
746 OpenGl_Context* aCtx = (OpenGl_Context* )theUserParam;
747 aCtx->PushMessage (theSource, theType, theId, theSeverity, theMessage);
750 // =======================================================================
751 // function : PushMessage
753 // =======================================================================
754 void OpenGl_Context::PushMessage (const unsigned int theSource,
755 const unsigned int theType,
756 const unsigned int theId,
757 const unsigned int theSeverity,
758 const TCollection_ExtendedString& theMessage)
760 //OpenGl_Context* aCtx = (OpenGl_Context* )theUserParam;
761 Standard_CString& aSrc = (theSource >= GL_DEBUG_SOURCE_API_ARB
762 && theSource <= GL_DEBUG_SOURCE_OTHER_ARB)
763 ? THE_DBGMSG_SOURCES[theSource - GL_DEBUG_SOURCE_API_ARB]
764 : THE_DBGMSG_UNKNOWN;
765 Standard_CString& aType = (theType >= GL_DEBUG_TYPE_ERROR_ARB
766 && theType <= GL_DEBUG_TYPE_OTHER_ARB)
767 ? THE_DBGMSG_TYPES[theType - GL_DEBUG_TYPE_ERROR_ARB]
768 : THE_DBGMSG_UNKNOWN;
769 Standard_CString& aSev = theSeverity == GL_DEBUG_SEVERITY_HIGH_ARB
770 ? THE_DBGMSG_SEV_HIGH
771 : (theSeverity == GL_DEBUG_SEVERITY_MEDIUM_ARB
772 ? THE_DBGMSG_SEV_MEDIUM
773 : THE_DBGMSG_SEV_LOW);
774 Message_Gravity aGrav = theSeverity == GL_DEBUG_SEVERITY_HIGH_ARB
776 : (theSeverity == GL_DEBUG_SEVERITY_MEDIUM_ARB
780 TCollection_ExtendedString aMsg;
781 aMsg += "TKOpenGl"; aMsg += aSrc;
782 aMsg += " | Type: "; aMsg += aType;
783 aMsg += " | ID: "; aMsg += (Standard_Integer )theId;
784 aMsg += " | Severity: "; aMsg += aSev;
785 aMsg += " | Message:\n ";
788 Messenger()->Send (aMsg, aGrav);
791 // =======================================================================
794 // =======================================================================
795 void OpenGl_Context::init()
800 core11 = (OpenGl_GlCore11* )(&(*myFuncs));
801 core11fwd = (OpenGl_GlCore11Fwd* )(&(*myFuncs));
822 arbNPTW = CheckExtension ("GL_ARB_texture_non_power_of_two");
823 extBgra = CheckExtension ("GL_EXT_bgra");
824 extAnis = CheckExtension ("GL_EXT_texture_filter_anisotropic");
825 extPDS = CheckExtension ("GL_EXT_packed_depth_stencil");
826 atiMem = CheckExtension ("GL_ATI_meminfo");
827 nvxMem = CheckExtension ("GL_NVX_gpu_memory_info");
829 // get number of maximum clipping planes
830 glGetIntegerv (GL_MAX_CLIP_PLANES, &myMaxClipPlanes);
831 glGetIntegerv (GL_MAX_TEXTURE_SIZE, &myMaxTexDim);
834 glGetIntegerv (GL_STEREO, &aStereo);
835 myIsStereoBuffers = aStereo == 1;
839 glGetIntegerv (GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &myAnisoMax);
842 myClippingState.Init (myMaxClipPlanes);
860 //! Make record shorter to retrieve function pointer using variable with same name
861 #define FindProcShort(theFunc) FindProc(#theFunc, myFuncs->theFunc)
863 // retrieve platform-dependent extensions
864 #if defined(_WIN32) && !defined(HAVE_EGL)
865 if (FindProcShort (wglGetExtensionsStringARB))
867 const char* aWglExts = myFuncs->wglGetExtensionsStringARB (wglGetCurrentDC());
868 if (CheckExtension (aWglExts, "WGL_EXT_swap_control"))
870 FindProcShort (wglSwapIntervalEXT);
872 if (CheckExtension (aWglExts, "WGL_ARB_pixel_format"))
874 FindProcShort (wglChoosePixelFormatARB);
876 if (CheckExtension (aWglExts, "WGL_ARB_create_context_profile"))
878 FindProcShort (wglCreateContextAttribsARB);
880 if (CheckExtension (aWglExts, "WGL_NV_DX_interop"))
882 FindProcShort (wglDXSetResourceShareHandleNV);
883 FindProcShort (wglDXOpenDeviceNV);
884 FindProcShort (wglDXCloseDeviceNV);
885 FindProcShort (wglDXRegisterObjectNV);
886 FindProcShort (wglDXUnregisterObjectNV);
887 FindProcShort (wglDXObjectAccessNV);
888 FindProcShort (wglDXLockObjectsNV);
889 FindProcShort (wglDXUnlockObjectsNV);
894 // initialize debug context extension
895 if (CheckExtension ("GL_ARB_debug_output"))
898 if (FindProcShort (glDebugMessageControlARB)
899 && FindProcShort (glDebugMessageInsertARB)
900 && FindProcShort (glDebugMessageCallbackARB)
901 && FindProcShort (glGetDebugMessageLogARB))
903 arbDbg = (OpenGl_ArbDbg* )(&(*myFuncs));
906 && caps->contextDebug)
908 // setup default callback
909 arbDbg->glDebugMessageCallbackARB (debugCallbackWrap, this);
911 glEnable (GL_DEBUG_OUTPUT_SYNCHRONOUS_ARB);
916 // load OpenGL 1.2 new functions
917 has12 = IsGlGreaterEqual (1, 2)
918 && FindProcShort (glBlendColor)
919 && FindProcShort (glBlendEquation)
920 && FindProcShort (glDrawRangeElements)
921 && FindProcShort (glTexImage3D)
922 && FindProcShort (glTexSubImage3D)
923 && FindProcShort (glCopyTexSubImage3D);
925 // load OpenGL 1.3 new functions
926 has13 = IsGlGreaterEqual (1, 3)
927 && FindProcShort (glActiveTexture)
928 && FindProcShort (glSampleCoverage)
929 && FindProcShort (glCompressedTexImage3D)
930 && FindProcShort (glCompressedTexImage2D)
931 && FindProcShort (glCompressedTexImage1D)
932 && FindProcShort (glCompressedTexSubImage3D)
933 && FindProcShort (glCompressedTexSubImage2D)
934 && FindProcShort (glCompressedTexSubImage1D)
935 && FindProcShort (glGetCompressedTexImage)
936 && FindProcShort (glClientActiveTexture)
937 && FindProcShort (glMultiTexCoord1d)
938 && FindProcShort (glMultiTexCoord1dv)
939 && FindProcShort (glMultiTexCoord1f)
940 && FindProcShort (glMultiTexCoord1fv)
941 && FindProcShort (glMultiTexCoord1i)
942 && FindProcShort (glMultiTexCoord1iv)
943 && FindProcShort (glMultiTexCoord1s)
944 && FindProcShort (glMultiTexCoord1sv)
945 && FindProcShort (glMultiTexCoord2d)
946 && FindProcShort (glMultiTexCoord2dv)
947 && FindProcShort (glMultiTexCoord2f)
948 && FindProcShort (glMultiTexCoord2fv)
949 && FindProcShort (glMultiTexCoord2i)
950 && FindProcShort (glMultiTexCoord2iv)
951 && FindProcShort (glMultiTexCoord2s)
952 && FindProcShort (glMultiTexCoord2sv)
953 && FindProcShort (glMultiTexCoord3d)
954 && FindProcShort (glMultiTexCoord3dv)
955 && FindProcShort (glMultiTexCoord3f)
956 && FindProcShort (glMultiTexCoord3fv)
957 && FindProcShort (glMultiTexCoord3i)
958 && FindProcShort (glMultiTexCoord3iv)
959 && FindProcShort (glMultiTexCoord3s)
960 && FindProcShort (glMultiTexCoord3sv)
961 && FindProcShort (glMultiTexCoord4d)
962 && FindProcShort (glMultiTexCoord4dv)
963 && FindProcShort (glMultiTexCoord4f)
964 && FindProcShort (glMultiTexCoord4fv)
965 && FindProcShort (glMultiTexCoord4i)
966 && FindProcShort (glMultiTexCoord4iv)
967 && FindProcShort (glMultiTexCoord4s)
968 && FindProcShort (glMultiTexCoord4sv)
969 && FindProcShort (glLoadTransposeMatrixf)
970 && FindProcShort (glLoadTransposeMatrixd)
971 && FindProcShort (glMultTransposeMatrixf)
972 && FindProcShort (glMultTransposeMatrixd);
974 // load OpenGL 1.4 new functions
975 has14 = IsGlGreaterEqual (1, 4)
976 && FindProcShort (glBlendFuncSeparate)
977 && FindProcShort (glMultiDrawArrays)
978 && FindProcShort (glMultiDrawElements)
979 && FindProcShort (glPointParameterf)
980 && FindProcShort (glPointParameterfv)
981 && FindProcShort (glPointParameteri)
982 && FindProcShort (glPointParameteriv);
984 // load OpenGL 1.5 new functions
985 has15 = IsGlGreaterEqual (1, 5)
986 && FindProcShort (glGenQueries)
987 && FindProcShort (glDeleteQueries)
988 && FindProcShort (glIsQuery)
989 && FindProcShort (glBeginQuery)
990 && FindProcShort (glEndQuery)
991 && FindProcShort (glGetQueryiv)
992 && FindProcShort (glGetQueryObjectiv)
993 && FindProcShort (glGetQueryObjectuiv)
994 && FindProcShort (glBindBuffer)
995 && FindProcShort (glDeleteBuffers)
996 && FindProcShort (glGenBuffers)
997 && FindProcShort (glIsBuffer)
998 && FindProcShort (glBufferData)
999 && FindProcShort (glBufferSubData)
1000 && FindProcShort (glGetBufferSubData)
1001 && FindProcShort (glMapBuffer)
1002 && FindProcShort (glUnmapBuffer)
1003 && FindProcShort (glGetBufferParameteriv)
1004 && FindProcShort (glGetBufferPointerv);
1006 // load OpenGL 2.0 new functions
1007 has20 = IsGlGreaterEqual (2, 0)
1008 && FindProcShort (glBlendEquationSeparate)
1009 && FindProcShort (glDrawBuffers)
1010 && FindProcShort (glStencilOpSeparate)
1011 && FindProcShort (glStencilFuncSeparate)
1012 && FindProcShort (glStencilMaskSeparate)
1013 && FindProcShort (glAttachShader)
1014 && FindProcShort (glBindAttribLocation)
1015 && FindProcShort (glCompileShader)
1016 && FindProcShort (glCreateProgram)
1017 && FindProcShort (glCreateShader)
1018 && FindProcShort (glDeleteProgram)
1019 && FindProcShort (glDeleteShader)
1020 && FindProcShort (glDetachShader)
1021 && FindProcShort (glDisableVertexAttribArray)
1022 && FindProcShort (glEnableVertexAttribArray)
1023 && FindProcShort (glGetActiveAttrib)
1024 && FindProcShort (glGetActiveUniform)
1025 && FindProcShort (glGetAttachedShaders)
1026 && FindProcShort (glGetAttribLocation)
1027 && FindProcShort (glGetProgramiv)
1028 && FindProcShort (glGetProgramInfoLog)
1029 && FindProcShort (glGetShaderiv)
1030 && FindProcShort (glGetShaderInfoLog)
1031 && FindProcShort (glGetShaderSource)
1032 && FindProcShort (glGetUniformLocation)
1033 && FindProcShort (glGetUniformfv)
1034 && FindProcShort (glGetUniformiv)
1035 && FindProcShort (glGetVertexAttribdv)
1036 && FindProcShort (glGetVertexAttribfv)
1037 && FindProcShort (glGetVertexAttribiv)
1038 && FindProcShort (glGetVertexAttribPointerv)
1039 && FindProcShort (glIsProgram)
1040 && FindProcShort (glIsShader)
1041 && FindProcShort (glLinkProgram)
1042 && FindProcShort (glShaderSource)
1043 && FindProcShort (glUseProgram)
1044 && FindProcShort (glUniform1f)
1045 && FindProcShort (glUniform2f)
1046 && FindProcShort (glUniform3f)
1047 && FindProcShort (glUniform4f)
1048 && FindProcShort (glUniform1i)
1049 && FindProcShort (glUniform2i)
1050 && FindProcShort (glUniform3i)
1051 && FindProcShort (glUniform4i)
1052 && FindProcShort (glUniform1fv)
1053 && FindProcShort (glUniform2fv)
1054 && FindProcShort (glUniform3fv)
1055 && FindProcShort (glUniform4fv)
1056 && FindProcShort (glUniform1iv)
1057 && FindProcShort (glUniform2iv)
1058 && FindProcShort (glUniform3iv)
1059 && FindProcShort (glUniform4iv)
1060 && FindProcShort (glUniformMatrix2fv)
1061 && FindProcShort (glUniformMatrix3fv)
1062 && FindProcShort (glUniformMatrix4fv)
1063 && FindProcShort (glValidateProgram)
1064 && FindProcShort (glVertexAttrib1d)
1065 && FindProcShort (glVertexAttrib1dv)
1066 && FindProcShort (glVertexAttrib1f)
1067 && FindProcShort (glVertexAttrib1fv)
1068 && FindProcShort (glVertexAttrib1s)
1069 && FindProcShort (glVertexAttrib1sv)
1070 && FindProcShort (glVertexAttrib2d)
1071 && FindProcShort (glVertexAttrib2dv)
1072 && FindProcShort (glVertexAttrib2f)
1073 && FindProcShort (glVertexAttrib2fv)
1074 && FindProcShort (glVertexAttrib2s)
1075 && FindProcShort (glVertexAttrib2sv)
1076 && FindProcShort (glVertexAttrib3d)
1077 && FindProcShort (glVertexAttrib3dv)
1078 && FindProcShort (glVertexAttrib3f)
1079 && FindProcShort (glVertexAttrib3fv)
1080 && FindProcShort (glVertexAttrib3s)
1081 && FindProcShort (glVertexAttrib3sv)
1082 && FindProcShort (glVertexAttrib4Nbv)
1083 && FindProcShort (glVertexAttrib4Niv)
1084 && FindProcShort (glVertexAttrib4Nsv)
1085 && FindProcShort (glVertexAttrib4Nub)
1086 && FindProcShort (glVertexAttrib4Nubv)
1087 && FindProcShort (glVertexAttrib4Nuiv)
1088 && FindProcShort (glVertexAttrib4Nusv)
1089 && FindProcShort (glVertexAttrib4bv)
1090 && FindProcShort (glVertexAttrib4d)
1091 && FindProcShort (glVertexAttrib4dv)
1092 && FindProcShort (glVertexAttrib4f)
1093 && FindProcShort (glVertexAttrib4fv)
1094 && FindProcShort (glVertexAttrib4iv)
1095 && FindProcShort (glVertexAttrib4s)
1096 && FindProcShort (glVertexAttrib4sv)
1097 && FindProcShort (glVertexAttrib4ubv)
1098 && FindProcShort (glVertexAttrib4uiv)
1099 && FindProcShort (glVertexAttrib4usv)
1100 && FindProcShort (glVertexAttribPointer);
1102 // load OpenGL 2.1 new functions
1103 has21 = IsGlGreaterEqual (2, 1)
1104 && FindProcShort (glUniformMatrix2x3fv)
1105 && FindProcShort (glUniformMatrix3x2fv)
1106 && FindProcShort (glUniformMatrix2x4fv)
1107 && FindProcShort (glUniformMatrix4x2fv)
1108 && FindProcShort (glUniformMatrix3x4fv)
1109 && FindProcShort (glUniformMatrix4x3fv);
1111 // load GL_ARB_framebuffer_object (added to OpenGL 3.0 core)
1112 const bool hasFBO = (IsGlGreaterEqual (3, 0) || CheckExtension ("GL_ARB_framebuffer_object"))
1113 && FindProcShort (glIsRenderbuffer)
1114 && FindProcShort (glBindRenderbuffer)
1115 && FindProcShort (glDeleteRenderbuffers)
1116 && FindProcShort (glGenRenderbuffers)
1117 && FindProcShort (glRenderbufferStorage)
1118 && FindProcShort (glGetRenderbufferParameteriv)
1119 && FindProcShort (glIsFramebuffer)
1120 && FindProcShort (glBindFramebuffer)
1121 && FindProcShort (glDeleteFramebuffers)
1122 && FindProcShort (glGenFramebuffers)
1123 && FindProcShort (glCheckFramebufferStatus)
1124 && FindProcShort (glFramebufferTexture1D)
1125 && FindProcShort (glFramebufferTexture2D)
1126 && FindProcShort (glFramebufferTexture3D)
1127 && FindProcShort (glFramebufferRenderbuffer)
1128 && FindProcShort (glGetFramebufferAttachmentParameteriv)
1129 && FindProcShort (glGenerateMipmap)
1130 && FindProcShort (glBlitFramebuffer)
1131 && FindProcShort (glRenderbufferStorageMultisample)
1132 && FindProcShort (glFramebufferTextureLayer);
1134 // load GL_ARB_vertex_array_object (added to OpenGL 3.0 core)
1135 const bool hasVAO = (IsGlGreaterEqual (3, 0) || CheckExtension ("GL_ARB_vertex_array_object"))
1136 && FindProcShort (glBindVertexArray)
1137 && FindProcShort (glDeleteVertexArrays)
1138 && FindProcShort (glGenVertexArrays)
1139 && FindProcShort (glIsVertexArray);
1141 // load GL_ARB_map_buffer_range (added to OpenGL 3.0 core)
1142 const bool hasMapBufferRange = (IsGlGreaterEqual (3, 0) || CheckExtension ("GL_ARB_map_buffer_range"))
1143 && FindProcShort (glMapBufferRange)
1144 && FindProcShort (glFlushMappedBufferRange);
1146 // load OpenGL 3.0 new functions
1147 has30 = IsGlGreaterEqual (3, 0)
1150 && hasMapBufferRange
1151 && FindProcShort (glColorMaski)
1152 && FindProcShort (glGetBooleani_v)
1153 && FindProcShort (glGetIntegeri_v)
1154 && FindProcShort (glEnablei)
1155 && FindProcShort (glDisablei)
1156 && FindProcShort (glIsEnabledi)
1157 && FindProcShort (glBeginTransformFeedback)
1158 && FindProcShort (glEndTransformFeedback)
1159 && FindProcShort (glBindBufferRange)
1160 && FindProcShort (glBindBufferBase)
1161 && FindProcShort (glTransformFeedbackVaryings)
1162 && FindProcShort (glGetTransformFeedbackVarying)
1163 && FindProcShort (glClampColor)
1164 && FindProcShort (glBeginConditionalRender)
1165 && FindProcShort (glEndConditionalRender)
1166 && FindProcShort (glVertexAttribIPointer)
1167 && FindProcShort (glGetVertexAttribIiv)
1168 && FindProcShort (glGetVertexAttribIuiv)
1169 && FindProcShort (glVertexAttribI1i)
1170 && FindProcShort (glVertexAttribI2i)
1171 && FindProcShort (glVertexAttribI3i)
1172 && FindProcShort (glVertexAttribI4i)
1173 && FindProcShort (glVertexAttribI1ui)
1174 && FindProcShort (glVertexAttribI2ui)
1175 && FindProcShort (glVertexAttribI3ui)
1176 && FindProcShort (glVertexAttribI4ui)
1177 && FindProcShort (glVertexAttribI1iv)
1178 && FindProcShort (glVertexAttribI2iv)
1179 && FindProcShort (glVertexAttribI3iv)
1180 && FindProcShort (glVertexAttribI4iv)
1181 && FindProcShort (glVertexAttribI1uiv)
1182 && FindProcShort (glVertexAttribI2uiv)
1183 && FindProcShort (glVertexAttribI3uiv)
1184 && FindProcShort (glVertexAttribI4uiv)
1185 && FindProcShort (glVertexAttribI4bv)
1186 && FindProcShort (glVertexAttribI4sv)
1187 && FindProcShort (glVertexAttribI4ubv)
1188 && FindProcShort (glVertexAttribI4usv)
1189 && FindProcShort (glGetUniformuiv)
1190 && FindProcShort (glBindFragDataLocation)
1191 && FindProcShort (glGetFragDataLocation)
1192 && FindProcShort (glUniform1ui)
1193 && FindProcShort (glUniform2ui)
1194 && FindProcShort (glUniform3ui)
1195 && FindProcShort (glUniform4ui)
1196 && FindProcShort (glUniform1uiv)
1197 && FindProcShort (glUniform2uiv)
1198 && FindProcShort (glUniform3uiv)
1199 && FindProcShort (glUniform4uiv)
1200 && FindProcShort (glTexParameterIiv)
1201 && FindProcShort (glTexParameterIuiv)
1202 && FindProcShort (glGetTexParameterIiv)
1203 && FindProcShort (glGetTexParameterIuiv)
1204 && FindProcShort (glClearBufferiv)
1205 && FindProcShort (glClearBufferuiv)
1206 && FindProcShort (glClearBufferfv)
1207 && FindProcShort (glClearBufferfi)
1208 && FindProcShort (glGetStringi);
1210 // load GL_ARB_uniform_buffer_object (added to OpenGL 3.1 core)
1211 const bool hasUBO = (IsGlGreaterEqual (3, 1) || CheckExtension ("GL_ARB_uniform_buffer_object"))
1212 && FindProcShort (glGetUniformIndices)
1213 && FindProcShort (glGetActiveUniformsiv)
1214 && FindProcShort (glGetActiveUniformName)
1215 && FindProcShort (glGetUniformBlockIndex)
1216 && FindProcShort (glGetActiveUniformBlockiv)
1217 && FindProcShort (glGetActiveUniformBlockName)
1218 && FindProcShort (glUniformBlockBinding);
1220 // load GL_ARB_copy_buffer (added to OpenGL 3.1 core)
1221 const bool hasCopyBufSubData = (IsGlGreaterEqual (3, 1) || CheckExtension ("GL_ARB_copy_buffer"))
1222 && FindProcShort (glCopyBufferSubData);
1226 // NPOT textures are required by OpenGL 2.0 specifications
1227 // but doesn't hardware accelerated by some ancient OpenGL 2.1 hardware (GeForce FX, RadeOn 9700 etc.)
1228 arbNPTW = Standard_True;
1229 arbTexRG = Standard_True;
1232 // load OpenGL 3.1 new functions
1233 has31 = IsGlGreaterEqual (3, 1)
1235 && hasCopyBufSubData
1236 && FindProcShort (glDrawArraysInstanced)
1237 && FindProcShort (glDrawElementsInstanced)
1238 && FindProcShort (glTexBuffer)
1239 && FindProcShort (glPrimitiveRestartIndex);
1241 // load GL_ARB_draw_elements_base_vertex (added to OpenGL 3.2 core)
1242 const bool hasDrawElemsBaseVert = (IsGlGreaterEqual (3, 2) || CheckExtension ("GL_ARB_draw_elements_base_vertex"))
1243 && FindProcShort (glDrawElementsBaseVertex)
1244 && FindProcShort (glDrawRangeElementsBaseVertex)
1245 && FindProcShort (glDrawElementsInstancedBaseVertex)
1246 && FindProcShort (glMultiDrawElementsBaseVertex);
1248 // load GL_ARB_provoking_vertex (added to OpenGL 3.2 core)
1249 const bool hasProvokingVert = (IsGlGreaterEqual (3, 2) || CheckExtension ("GL_ARB_provoking_vertex"))
1250 && FindProcShort (glProvokingVertex);
1252 // load GL_ARB_sync (added to OpenGL 3.2 core)
1253 const bool hasSync = (IsGlGreaterEqual (3, 2) || CheckExtension ("GL_ARB_sync"))
1254 && FindProcShort (glFenceSync)
1255 && FindProcShort (glIsSync)
1256 && FindProcShort (glDeleteSync)
1257 && FindProcShort (glClientWaitSync)
1258 && FindProcShort (glWaitSync)
1259 && FindProcShort (glGetInteger64v)
1260 && FindProcShort (glGetSynciv);
1262 // load GL_ARB_texture_multisample (added to OpenGL 3.2 core)
1263 const bool hasTextureMultisample = (IsGlGreaterEqual (3, 2) || CheckExtension ("GL_ARB_texture_multisample"))
1264 && FindProcShort (glTexImage2DMultisample)
1265 && FindProcShort (glTexImage3DMultisample)
1266 && FindProcShort (glGetMultisamplefv)
1267 && FindProcShort (glSampleMaski);
1269 // load OpenGL 3.2 new functions
1270 has32 = IsGlGreaterEqual (3, 2)
1271 && hasDrawElemsBaseVert
1274 && hasTextureMultisample
1275 && FindProcShort (glGetInteger64i_v)
1276 && FindProcShort (glGetBufferParameteri64v)
1277 && FindProcShort (glFramebufferTexture);
1279 // load GL_ARB_blend_func_extended (added to OpenGL 3.3 core)
1280 const bool hasBlendFuncExtended = (IsGlGreaterEqual (3, 3) || CheckExtension ("GL_ARB_blend_func_extended"))
1281 && FindProcShort (glBindFragDataLocationIndexed)
1282 && FindProcShort (glGetFragDataIndex);
1284 // load GL_ARB_sampler_objects (added to OpenGL 3.3 core)
1285 const bool hasSamplerObjects = (IsGlGreaterEqual (3, 3) || CheckExtension ("GL_ARB_sampler_objects"))
1286 && FindProcShort (glGenSamplers)
1287 && FindProcShort (glDeleteSamplers)
1288 && FindProcShort (glIsSampler)
1289 && FindProcShort (glBindSampler)
1290 && FindProcShort (glSamplerParameteri)
1291 && FindProcShort (glSamplerParameteriv)
1292 && FindProcShort (glSamplerParameterf)
1293 && FindProcShort (glSamplerParameterfv)
1294 && FindProcShort (glSamplerParameterIiv)
1295 && FindProcShort (glSamplerParameterIuiv)
1296 && FindProcShort (glGetSamplerParameteriv)
1297 && FindProcShort (glGetSamplerParameterIiv)
1298 && FindProcShort (glGetSamplerParameterfv)
1299 && FindProcShort (glGetSamplerParameterIuiv);
1301 // load GL_ARB_timer_query (added to OpenGL 3.3 core)
1302 const bool hasTimerQuery = (IsGlGreaterEqual (3, 3) || CheckExtension ("GL_ARB_timer_query"))
1303 && FindProcShort (glQueryCounter)
1304 && FindProcShort (glGetQueryObjecti64v)
1305 && FindProcShort (glGetQueryObjectui64v);
1307 // load GL_ARB_vertex_type_2_10_10_10_rev (added to OpenGL 3.3 core)
1308 const bool hasVertType21010101rev = (IsGlGreaterEqual (3, 3) || CheckExtension ("GL_ARB_vertex_type_2_10_10_10_rev"))
1309 && FindProcShort (glVertexP2ui)
1310 && FindProcShort (glVertexP2uiv)
1311 && FindProcShort (glVertexP3ui)
1312 && FindProcShort (glVertexP3uiv)
1313 && FindProcShort (glVertexP4ui)
1314 && FindProcShort (glVertexP4uiv)
1315 && FindProcShort (glTexCoordP1ui)
1316 && FindProcShort (glTexCoordP1uiv)
1317 && FindProcShort (glTexCoordP2ui)
1318 && FindProcShort (glTexCoordP2uiv)
1319 && FindProcShort (glTexCoordP3ui)
1320 && FindProcShort (glTexCoordP3uiv)
1321 && FindProcShort (glTexCoordP4ui)
1322 && FindProcShort (glTexCoordP4uiv)
1323 && FindProcShort (glMultiTexCoordP1ui)
1324 && FindProcShort (glMultiTexCoordP1uiv)
1325 && FindProcShort (glMultiTexCoordP2ui)
1326 && FindProcShort (glMultiTexCoordP2uiv)
1327 && FindProcShort (glMultiTexCoordP3ui)
1328 && FindProcShort (glMultiTexCoordP3uiv)
1329 && FindProcShort (glMultiTexCoordP4ui)
1330 && FindProcShort (glMultiTexCoordP4uiv)
1331 && FindProcShort (glNormalP3ui)
1332 && FindProcShort (glNormalP3uiv)
1333 && FindProcShort (glColorP3ui)
1334 && FindProcShort (glColorP3uiv)
1335 && FindProcShort (glColorP4ui)
1336 && FindProcShort (glColorP4uiv)
1337 && FindProcShort (glSecondaryColorP3ui)
1338 && FindProcShort (glSecondaryColorP3uiv)
1339 && FindProcShort (glVertexAttribP1ui)
1340 && FindProcShort (glVertexAttribP1uiv)
1341 && FindProcShort (glVertexAttribP2ui)
1342 && FindProcShort (glVertexAttribP2uiv)
1343 && FindProcShort (glVertexAttribP3ui)
1344 && FindProcShort (glVertexAttribP3uiv)
1345 && FindProcShort (glVertexAttribP4ui)
1346 && FindProcShort (glVertexAttribP4uiv);
1348 // load OpenGL 3.3 extra functions
1349 has33 = IsGlGreaterEqual (3, 3)
1350 && hasBlendFuncExtended
1351 && hasSamplerObjects
1353 && hasVertType21010101rev
1354 && FindProcShort (glVertexAttribDivisor);
1356 // load GL_ARB_draw_indirect (added to OpenGL 4.0 core)
1357 const bool hasDrawIndirect = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_draw_indirect"))
1358 && FindProcShort (glDrawArraysIndirect)
1359 && FindProcShort (glDrawElementsIndirect);
1361 // load GL_ARB_gpu_shader_fp64 (added to OpenGL 4.0 core)
1362 const bool hasShaderFP64 = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_gpu_shader_fp64"))
1363 && FindProcShort (glUniform1d)
1364 && FindProcShort (glUniform2d)
1365 && FindProcShort (glUniform3d)
1366 && FindProcShort (glUniform4d)
1367 && FindProcShort (glUniform1dv)
1368 && FindProcShort (glUniform2dv)
1369 && FindProcShort (glUniform3dv)
1370 && FindProcShort (glUniform4dv)
1371 && FindProcShort (glUniformMatrix2dv)
1372 && FindProcShort (glUniformMatrix3dv)
1373 && FindProcShort (glUniformMatrix4dv)
1374 && FindProcShort (glUniformMatrix2x3dv)
1375 && FindProcShort (glUniformMatrix2x4dv)
1376 && FindProcShort (glUniformMatrix3x2dv)
1377 && FindProcShort (glUniformMatrix3x4dv)
1378 && FindProcShort (glUniformMatrix4x2dv)
1379 && FindProcShort (glUniformMatrix4x3dv)
1380 && FindProcShort (glGetUniformdv);
1382 // load GL_ARB_shader_subroutine (added to OpenGL 4.0 core)
1383 const bool hasShaderSubroutine = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_shader_subroutine"))
1384 && FindProcShort (glGetSubroutineUniformLocation)
1385 && FindProcShort (glGetSubroutineIndex)
1386 && FindProcShort (glGetActiveSubroutineUniformiv)
1387 && FindProcShort (glGetActiveSubroutineUniformName)
1388 && FindProcShort (glGetActiveSubroutineName)
1389 && FindProcShort (glUniformSubroutinesuiv)
1390 && FindProcShort (glGetUniformSubroutineuiv)
1391 && FindProcShort (glGetProgramStageiv);
1393 // load GL_ARB_tessellation_shader (added to OpenGL 4.0 core)
1394 const bool hasTessellationShader = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_tessellation_shader"))
1395 && FindProcShort (glPatchParameteri)
1396 && FindProcShort (glPatchParameterfv);
1398 // load GL_ARB_transform_feedback2 (added to OpenGL 4.0 core)
1399 const bool hasTrsfFeedback2 = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_transform_feedback2"))
1400 && FindProcShort (glBindTransformFeedback)
1401 && FindProcShort (glDeleteTransformFeedbacks)
1402 && FindProcShort (glGenTransformFeedbacks)
1403 && FindProcShort (glIsTransformFeedback)
1404 && FindProcShort (glPauseTransformFeedback)
1405 && FindProcShort (glResumeTransformFeedback)
1406 && FindProcShort (glDrawTransformFeedback);
1408 // load GL_ARB_transform_feedback3 (added to OpenGL 4.0 core)
1409 const bool hasTrsfFeedback3 = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_transform_feedback3"))
1410 && FindProcShort (glDrawTransformFeedbackStream)
1411 && FindProcShort (glBeginQueryIndexed)
1412 && FindProcShort (glEndQueryIndexed)
1413 && FindProcShort (glGetQueryIndexediv);
1415 // load OpenGL 4.0 new functions
1416 has40 = IsGlGreaterEqual (4, 0)
1419 && hasShaderSubroutine
1420 && hasTessellationShader
1423 && FindProcShort (glMinSampleShading)
1424 && FindProcShort (glBlendEquationi)
1425 && FindProcShort (glBlendEquationSeparatei)
1426 && FindProcShort (glBlendFunci)
1427 && FindProcShort (glBlendFuncSeparatei);
1429 // load GL_ARB_ES2_compatibility (added to OpenGL 4.1 core)
1430 const bool hasES2Compatibility = (IsGlGreaterEqual (4, 1) || CheckExtension ("GL_ARB_ES2_compatibility"))
1431 && FindProcShort (glReleaseShaderCompiler)
1432 && FindProcShort (glShaderBinary)
1433 && FindProcShort (glGetShaderPrecisionFormat)
1434 && FindProcShort (glDepthRangef)
1435 && FindProcShort (glClearDepthf);
1437 // load GL_ARB_get_program_binary (added to OpenGL 4.1 core)
1438 const bool hasGetProgramBinary = (IsGlGreaterEqual (4, 1) || CheckExtension ("GL_ARB_get_program_binary"))
1439 && FindProcShort (glGetProgramBinary)
1440 && FindProcShort (glProgramBinary)
1441 && FindProcShort (glProgramParameteri);
1444 // load GL_ARB_separate_shader_objects (added to OpenGL 4.1 core)
1445 const bool hasSeparateShaderObjects = (IsGlGreaterEqual (4, 1) || CheckExtension ("GL_ARB_separate_shader_objects"))
1446 && FindProcShort (glUseProgramStages)
1447 && FindProcShort (glActiveShaderProgram)
1448 && FindProcShort (glCreateShaderProgramv)
1449 && FindProcShort (glBindProgramPipeline)
1450 && FindProcShort (glDeleteProgramPipelines)
1451 && FindProcShort (glGenProgramPipelines)
1452 && FindProcShort (glIsProgramPipeline)
1453 && FindProcShort (glGetProgramPipelineiv)
1454 && FindProcShort (glProgramUniform1i)
1455 && FindProcShort (glProgramUniform1iv)
1456 && FindProcShort (glProgramUniform1f)
1457 && FindProcShort (glProgramUniform1fv)
1458 && FindProcShort (glProgramUniform1d)
1459 && FindProcShort (glProgramUniform1dv)
1460 && FindProcShort (glProgramUniform1ui)
1461 && FindProcShort (glProgramUniform1uiv)
1462 && FindProcShort (glProgramUniform2i)
1463 && FindProcShort (glProgramUniform2iv)
1464 && FindProcShort (glProgramUniform2f)
1465 && FindProcShort (glProgramUniform2fv)
1466 && FindProcShort (glProgramUniform2d)
1467 && FindProcShort (glProgramUniform2dv)
1468 && FindProcShort (glProgramUniform2ui)
1469 && FindProcShort (glProgramUniform2uiv)
1470 && FindProcShort (glProgramUniform3i)
1471 && FindProcShort (glProgramUniform3iv)
1472 && FindProcShort (glProgramUniform3f)
1473 && FindProcShort (glProgramUniform3fv)
1474 && FindProcShort (glProgramUniform3d)
1475 && FindProcShort (glProgramUniform3dv)
1476 && FindProcShort (glProgramUniform3ui)
1477 && FindProcShort (glProgramUniform3uiv)
1478 && FindProcShort (glProgramUniform4i)
1479 && FindProcShort (glProgramUniform4iv)
1480 && FindProcShort (glProgramUniform4f)
1481 && FindProcShort (glProgramUniform4fv)
1482 && FindProcShort (glProgramUniform4d)
1483 && FindProcShort (glProgramUniform4dv)
1484 && FindProcShort (glProgramUniform4ui)
1485 && FindProcShort (glProgramUniform4uiv)
1486 && FindProcShort (glProgramUniformMatrix2fv)
1487 && FindProcShort (glProgramUniformMatrix3fv)
1488 && FindProcShort (glProgramUniformMatrix4fv)
1489 && FindProcShort (glProgramUniformMatrix2dv)
1490 && FindProcShort (glProgramUniformMatrix3dv)
1491 && FindProcShort (glProgramUniformMatrix4dv)
1492 && FindProcShort (glProgramUniformMatrix2x3fv)
1493 && FindProcShort (glProgramUniformMatrix3x2fv)
1494 && FindProcShort (glProgramUniformMatrix2x4fv)
1495 && FindProcShort (glProgramUniformMatrix4x2fv)
1496 && FindProcShort (glProgramUniformMatrix3x4fv)
1497 && FindProcShort (glProgramUniformMatrix4x3fv)
1498 && FindProcShort (glProgramUniformMatrix2x3dv)
1499 && FindProcShort (glProgramUniformMatrix3x2dv)
1500 && FindProcShort (glProgramUniformMatrix2x4dv)
1501 && FindProcShort (glProgramUniformMatrix4x2dv)
1502 && FindProcShort (glProgramUniformMatrix3x4dv)
1503 && FindProcShort (glProgramUniformMatrix4x3dv)
1504 && FindProcShort (glValidateProgramPipeline)
1505 && FindProcShort (glGetProgramPipelineInfoLog);
1507 // load GL_ARB_vertex_attrib_64bit (added to OpenGL 4.1 core)
1508 const bool hasVertAttrib64bit = (IsGlGreaterEqual (4, 1) || CheckExtension ("GL_ARB_vertex_attrib_64bit"))
1509 && FindProcShort (glVertexAttribL1d)
1510 && FindProcShort (glVertexAttribL2d)
1511 && FindProcShort (glVertexAttribL3d)
1512 && FindProcShort (glVertexAttribL4d)
1513 && FindProcShort (glVertexAttribL1dv)
1514 && FindProcShort (glVertexAttribL2dv)
1515 && FindProcShort (glVertexAttribL3dv)
1516 && FindProcShort (glVertexAttribL4dv)
1517 && FindProcShort (glVertexAttribLPointer)
1518 && FindProcShort (glGetVertexAttribLdv);
1520 // load GL_ARB_viewport_array (added to OpenGL 4.1 core)
1521 const bool hasViewportArray = (IsGlGreaterEqual (4, 1) || CheckExtension ("GL_ARB_viewport_array"))
1522 && FindProcShort (glViewportArrayv)
1523 && FindProcShort (glViewportIndexedf)
1524 && FindProcShort (glViewportIndexedfv)
1525 && FindProcShort (glScissorArrayv)
1526 && FindProcShort (glScissorIndexed)
1527 && FindProcShort (glScissorIndexedv)
1528 && FindProcShort (glDepthRangeArrayv)
1529 && FindProcShort (glDepthRangeIndexed)
1530 && FindProcShort (glGetFloati_v)
1531 && FindProcShort (glGetDoublei_v);
1533 has41 = IsGlGreaterEqual (4, 1)
1534 && hasES2Compatibility
1535 && hasGetProgramBinary
1536 && hasSeparateShaderObjects
1537 && hasVertAttrib64bit
1538 && hasViewportArray;
1540 // load GL_ARB_base_instance (added to OpenGL 4.2 core)
1541 const bool hasBaseInstance = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_base_instance"))
1542 && FindProcShort (glDrawArraysInstancedBaseInstance)
1543 && FindProcShort (glDrawElementsInstancedBaseInstance)
1544 && FindProcShort (glDrawElementsInstancedBaseVertexBaseInstance);
1546 // load GL_ARB_transform_feedback_instanced (added to OpenGL 4.2 core)
1547 const bool hasTrsfFeedbackInstanced = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_transform_feedback_instanced"))
1548 && FindProcShort (glDrawTransformFeedbackInstanced)
1549 && FindProcShort (glDrawTransformFeedbackStreamInstanced);
1551 // load GL_ARB_internalformat_query (added to OpenGL 4.2 core)
1552 const bool hasInternalFormatQuery = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_internalformat_query"))
1553 && FindProcShort (glGetInternalformativ);
1555 // load GL_ARB_shader_atomic_counters (added to OpenGL 4.2 core)
1556 const bool hasShaderAtomicCounters = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_shader_atomic_counters"))
1557 && FindProcShort (glGetActiveAtomicCounterBufferiv);
1559 // load GL_ARB_shader_image_load_store (added to OpenGL 4.2 core)
1560 const bool hasShaderImgLoadStore = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_shader_image_load_store"))
1561 && FindProcShort (glBindImageTexture)
1562 && FindProcShort (glMemoryBarrier);
1564 // load GL_ARB_texture_storage (added to OpenGL 4.2 core)
1565 const bool hasTextureStorage = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_texture_storage"))
1566 && FindProcShort (glTexStorage1D)
1567 && FindProcShort (glTexStorage2D)
1568 && FindProcShort (glTexStorage3D)
1569 && FindProcShort (glTextureStorage1DEXT)
1570 && FindProcShort (glTextureStorage2DEXT)
1571 && FindProcShort (glTextureStorage3DEXT);
1573 has42 = IsGlGreaterEqual (4, 2)
1575 && hasTrsfFeedbackInstanced
1576 && hasInternalFormatQuery
1577 && hasShaderAtomicCounters
1578 && hasShaderImgLoadStore
1579 && hasTextureStorage;
1581 has43 = IsGlGreaterEqual (4, 3)
1582 && FindProcShort (glClearBufferData)
1583 && FindProcShort (glClearBufferSubData)
1584 && FindProcShort (glDispatchCompute)
1585 && FindProcShort (glDispatchComputeIndirect)
1586 && FindProcShort (glCopyImageSubData)
1587 && FindProcShort (glFramebufferParameteri)
1588 && FindProcShort (glGetFramebufferParameteriv)
1589 && FindProcShort (glGetInternalformati64v)
1590 && FindProcShort (glInvalidateTexSubImage)
1591 && FindProcShort (glInvalidateTexImage)
1592 && FindProcShort (glInvalidateBufferSubData)
1593 && FindProcShort (glInvalidateBufferData)
1594 && FindProcShort (glInvalidateFramebuffer)
1595 && FindProcShort (glInvalidateSubFramebuffer)
1596 && FindProcShort (glMultiDrawArraysIndirect)
1597 && FindProcShort (glMultiDrawElementsIndirect)
1598 && FindProcShort (glGetProgramInterfaceiv)
1599 && FindProcShort (glGetProgramResourceIndex)
1600 && FindProcShort (glGetProgramResourceName)
1601 && FindProcShort (glGetProgramResourceiv)
1602 && FindProcShort (glGetProgramResourceLocation)
1603 && FindProcShort (glGetProgramResourceLocationIndex)
1604 && FindProcShort (glShaderStorageBlockBinding)
1605 && FindProcShort (glTexBufferRange)
1606 && FindProcShort (glTexStorage2DMultisample)
1607 && FindProcShort (glTexStorage3DMultisample)
1608 && FindProcShort (glTextureView)
1609 && FindProcShort (glBindVertexBuffer)
1610 && FindProcShort (glVertexAttribFormat)
1611 && FindProcShort (glVertexAttribIFormat)
1612 && FindProcShort (glVertexAttribLFormat)
1613 && FindProcShort (glVertexAttribBinding)
1614 && FindProcShort (glVertexBindingDivisor)
1615 && FindProcShort (glDebugMessageControl)
1616 && FindProcShort (glDebugMessageInsert)
1617 && FindProcShort (glDebugMessageCallback)
1618 && FindProcShort (glGetDebugMessageLog)
1619 && FindProcShort (glPushDebugGroup)
1620 && FindProcShort (glPopDebugGroup)
1621 && FindProcShort (glObjectLabel)
1622 && FindProcShort (glGetObjectLabel)
1623 && FindProcShort (glObjectPtrLabel)
1624 && FindProcShort (glGetObjectPtrLabel);
1626 // load GL_ARB_clear_texture (added to OpenGL 4.4 core)
1627 bool arbTexClear = (IsGlGreaterEqual (4, 4) || CheckExtension ("GL_ARB_clear_texture"))
1628 && FindProcShort (glClearTexImage)
1629 && FindProcShort (glClearTexSubImage);
1631 has44 = IsGlGreaterEqual (4, 4)
1633 && FindProcShort (glBufferStorage)
1634 && FindProcShort (glBindBuffersBase)
1635 && FindProcShort (glBindBuffersRange)
1636 && FindProcShort (glBindTextures)
1637 && FindProcShort (glBindSamplers)
1638 && FindProcShort (glBindImageTextures)
1639 && FindProcShort (glBindVertexBuffers);
1641 // initialize TBO extension (ARB)
1643 && CheckExtension ("GL_ARB_texture_buffer_object")
1644 && FindProc ("glTexBufferARB", myFuncs->glTexBuffer))
1646 arbTBO = (OpenGl_ArbTBO* )(&(*myFuncs));
1649 // initialize hardware instancing extension (ARB)
1651 && CheckExtension ("GL_ARB_draw_instanced")
1652 && FindProc ("glDrawArraysInstancedARB", myFuncs->glDrawArraysInstanced)
1653 && FindProc ("glDrawElementsInstancedARB", myFuncs->glDrawElementsInstanced))
1655 arbIns = (OpenGl_ArbIns* )(&(*myFuncs));
1658 // initialize FBO extension (ARB)
1661 arbFBO = (OpenGl_ArbFBO* )(&(*myFuncs));
1662 extPDS = Standard_True; // extension for EXT, but part of ARB
1665 // initialize GS extension (EXT)
1666 if (CheckExtension ("GL_EXT_geometry_shader4")
1667 && FindProcShort (glProgramParameteriEXT))
1669 extGS = (OpenGl_ExtGS* )(&(*myFuncs));
1696 core15 = (OpenGl_GlCore15* )(&(*myFuncs));
1697 core15fwd = (OpenGl_GlCore15Fwd* )(&(*myFuncs));
1706 core20 = (OpenGl_GlCore20* )(&(*myFuncs));
1707 core20fwd = (OpenGl_GlCore20Fwd* )(&(*myFuncs));
1729 arbTBO = (OpenGl_ArbTBO* )(&(*myFuncs));
1730 arbIns = (OpenGl_ArbIns* )(&(*myFuncs));
1738 core32 = (OpenGl_GlCore32* )(&(*myFuncs));
1739 core32back = (OpenGl_GlCore32Back* )(&(*myFuncs));
1761 core41 = (OpenGl_GlCore41* )(&(*myFuncs));
1762 core41back = (OpenGl_GlCore41Back* )(&(*myFuncs));
1770 core42 = (OpenGl_GlCore42* )(&(*myFuncs));
1771 core42back = (OpenGl_GlCore42Back* )(&(*myFuncs));
1779 core43 = (OpenGl_GlCore43* )(&(*myFuncs));
1780 core43back = (OpenGl_GlCore43Back* )(&(*myFuncs));
1788 core44 = (OpenGl_GlCore44* )(&(*myFuncs));
1789 core44back = (OpenGl_GlCore44Back* )(&(*myFuncs));
1792 // =======================================================================
1793 // function : MemoryInfo
1795 // =======================================================================
1796 Standard_Size OpenGl_Context::AvailableMemory() const
1800 // this is actually information for VBO pool
1801 // however because pools are mostly shared
1802 // it can be used for total GPU memory estimations
1805 glGetIntegerv (GL_VBO_FREE_MEMORY_ATI, aMemInfo);
1806 // returned value is in KiB, however this maybe changed in future
1807 return Standard_Size(aMemInfo[0]) * 1024;
1811 // current available dedicated video memory (in KiB), currently unused GPU memory
1813 glGetIntegerv (GL_GPU_MEMORY_INFO_CURRENT_AVAILABLE_VIDMEM_NVX, &aMemInfo);
1814 return Standard_Size(aMemInfo) * 1024;
1819 // =======================================================================
1820 // function : MemoryInfo
1822 // =======================================================================
1823 TCollection_AsciiString OpenGl_Context::MemoryInfo() const
1825 TCollection_AsciiString anInfo;
1829 memset (aValues, 0, sizeof(aValues));
1830 glGetIntegerv (GL_VBO_FREE_MEMORY_ATI, aValues);
1832 // total memory free in the pool
1833 anInfo += TCollection_AsciiString (" GPU free memory: ") + (aValues[0] / 1024) + " MiB\n";
1835 // largest available free block in the pool
1836 anInfo += TCollection_AsciiString (" Largest free block: ") + (aValues[1] / 1024) + " MiB\n";
1837 if (aValues[2] != aValues[0])
1839 // total auxiliary memory free
1840 anInfo += TCollection_AsciiString (" Free memory: ") + (aValues[2] / 1024) + " MiB\n";
1845 //current available dedicated video memory (in KiB), currently unused GPU memory
1847 glGetIntegerv (GL_GPU_MEMORY_INFO_CURRENT_AVAILABLE_VIDMEM_NVX, &aValue);
1848 anInfo += TCollection_AsciiString (" GPU free memory: ") + (aValue / 1024) + " MiB\n";
1850 // dedicated video memory, total size (in KiB) of the GPU memory
1851 GLint aDedicated = 0;
1852 glGetIntegerv (GL_GPU_MEMORY_INFO_DEDICATED_VIDMEM_NVX, &aDedicated);
1853 anInfo += TCollection_AsciiString (" GPU memory: ") + (aDedicated / 1024) + " MiB\n";
1855 // total available memory, total size (in KiB) of the memory available for allocations
1856 glGetIntegerv (GL_GPU_MEMORY_INFO_TOTAL_AVAILABLE_MEMORY_NVX, &aValue);
1857 if (aValue != aDedicated)
1859 // different only for special configurations
1860 anInfo += TCollection_AsciiString (" Total memory: ") + (aValue / 1024) + " MiB\n";
1867 // =======================================================================
1868 // function : GetResource
1870 // =======================================================================
1871 const Handle(OpenGl_Resource)& OpenGl_Context::GetResource (const TCollection_AsciiString& theKey) const
1873 return mySharedResources->IsBound (theKey) ? mySharedResources->Find (theKey) : NULL_GL_RESOURCE;
1876 // =======================================================================
1877 // function : ShareResource
1879 // =======================================================================
1880 Standard_Boolean OpenGl_Context::ShareResource (const TCollection_AsciiString& theKey,
1881 const Handle(OpenGl_Resource)& theResource)
1883 if (theKey.IsEmpty() || theResource.IsNull())
1885 return Standard_False;
1887 return mySharedResources->Bind (theKey, theResource);
1890 // =======================================================================
1891 // function : ReleaseResource
1893 // =======================================================================
1894 void OpenGl_Context::ReleaseResource (const TCollection_AsciiString& theKey,
1895 const Standard_Boolean theToDelay)
1897 if (!mySharedResources->IsBound (theKey))
1901 const Handle(OpenGl_Resource)& aRes = mySharedResources->Find (theKey);
1902 if (aRes->GetRefCount() > 1)
1909 myDelayed->Bind (theKey, 1);
1913 aRes->Release (this);
1914 mySharedResources->UnBind (theKey);
1918 // =======================================================================
1919 // function : DelayedRelease
1921 // =======================================================================
1922 void OpenGl_Context::DelayedRelease (Handle(OpenGl_Resource)& theResource)
1924 myUnusedResources->Prepend (theResource);
1925 theResource.Nullify();
1928 // =======================================================================
1929 // function : ReleaseDelayed
1931 // =======================================================================
1932 void OpenGl_Context::ReleaseDelayed()
1934 // release queued elements
1935 while (!myUnusedResources->IsEmpty())
1937 myUnusedResources->First()->Release (this);
1938 myUnusedResources->RemoveFirst();
1941 // release delayed shared resources
1942 NCollection_Vector<TCollection_AsciiString> aDeadList;
1943 for (NCollection_DataMap<TCollection_AsciiString, Standard_Integer>::Iterator anIter (*myDelayed);
1944 anIter.More(); anIter.Next())
1946 if (++anIter.ChangeValue() <= 2)
1948 continue; // postpone release one more frame to ensure noone use it periodically
1951 const TCollection_AsciiString& aKey = anIter.Key();
1952 if (!mySharedResources->IsBound (aKey))
1954 // mixed unshared strategy delayed/undelayed was used!
1955 aDeadList.Append (aKey);
1959 Handle(OpenGl_Resource)& aRes = mySharedResources->ChangeFind (aKey);
1960 if (aRes->GetRefCount() > 1)
1962 // should be only 1 instance in mySharedResources
1963 // if not - resource was reused again
1964 aDeadList.Append (aKey);
1968 // release resource if no one requiested it more than 2 redraw calls
1969 aRes->Release (this);
1970 mySharedResources->UnBind (aKey);
1971 aDeadList.Append (aKey);
1974 for (Standard_Integer anIter = 0; anIter < aDeadList.Length(); ++anIter)
1976 myDelayed->UnBind (aDeadList.Value (anIter));