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_ArbSamplerObject.hxx>
28 #include <OpenGl_ArbTexBindless.hxx>
29 #include <OpenGl_GlCore45.hxx>
30 #include <OpenGl_FrameBuffer.hxx>
31 #include <OpenGl_FrameStats.hxx>
32 #include <OpenGl_Sampler.hxx>
33 #include <OpenGl_ShaderManager.hxx>
34 #include <OpenGl_Workspace.hxx>
35 #include <OpenGl_Aspects.hxx>
36 #include <Graphic3d_TransformUtils.hxx>
37 #include <Graphic3d_RenderingParams.hxx>
39 #include <Message_Messenger.hxx>
41 #include <NCollection_Vector.hxx>
43 #include <Standard_ProgramError.hxx>
45 IMPLEMENT_STANDARD_RTTIEXT(OpenGl_Context,Standard_Transient)
50 #pragma comment(lib, "libEGL.lib")
54 #elif defined(__APPLE__) && !defined(MACOSX_USE_GLX)
56 #if defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE
59 #include <OpenGL/OpenGL.h>
60 #include <CoreGraphics/CoreGraphics.h>
63 #include <GL/glx.h> // glXGetProcAddress()
67 #include <emscripten/html5.h>
69 //! Check if WebGL extension is available and activate it
70 //! (usage of extension without activation will generate errors).
71 static bool checkEnableWebGlExtension (const OpenGl_Context& theCtx,
72 const char* theExtName)
74 if (!theCtx.CheckExtension (theExtName))
78 if (EMSCRIPTEN_WEBGL_CONTEXT_HANDLE aWebGlCtx = emscripten_webgl_get_current_context())
80 if (emscripten_webgl_enable_extension (aWebGlCtx, theExtName))
91 static const Handle(OpenGl_Resource) NULL_GL_RESOURCE;
92 static const OpenGl_Mat4 THE_IDENTITY_MATRIX;
94 //! Add key-value pair to the dictionary.
95 static void addInfo (TColStd_IndexedDataMapOfStringString& theDict,
96 const TCollection_AsciiString& theKey,
97 const TCollection_AsciiString& theValue)
99 theDict.ChangeFromIndex (theDict.Add (theKey, theValue)) = theValue;
102 //! Add key-value pair to the dictionary.
103 static void addInfo (TColStd_IndexedDataMapOfStringString& theDict,
104 const TCollection_AsciiString& theKey,
105 const char* theValue)
107 TCollection_AsciiString aValue (theValue != NULL ? theValue : "");
108 theDict.ChangeFromIndex (theDict.Add (theKey, aValue)) = aValue;
112 // =======================================================================
113 // function : OpenGl_Context
115 // =======================================================================
116 OpenGl_Context::OpenGl_Context (const Handle(OpenGl_Caps)& theCaps)
137 caps (!theCaps.IsNull() ? theCaps : new OpenGl_Caps()),
138 #if defined(GL_ES_VERSION_2_0)
139 hasHighp (Standard_False),
140 hasUintIndex(Standard_False),
141 hasTexRGBA8(Standard_False),
143 hasHighp (Standard_True),
144 hasUintIndex(Standard_True),
145 hasTexRGBA8(Standard_True),
147 hasTexFloatLinear (Standard_False),
148 hasTexSRGB (Standard_False),
149 hasFboSRGB (Standard_False),
150 hasSRGBControl (Standard_False),
151 #if defined(GL_ES_VERSION_2_0)
152 hasFlatShading (OpenGl_FeatureNotAvailable),
154 hasFlatShading (OpenGl_FeatureInCore),
156 hasGlslBitwiseOps (OpenGl_FeatureNotAvailable),
157 hasDrawBuffers (OpenGl_FeatureNotAvailable),
158 hasFloatBuffer (OpenGl_FeatureNotAvailable),
159 hasHalfFloatBuffer (OpenGl_FeatureNotAvailable),
160 hasSampleVariables (OpenGl_FeatureNotAvailable),
161 hasGeometryStage (OpenGl_FeatureNotAvailable),
162 arbDrawBuffers (Standard_False),
163 arbNPTW (Standard_False),
164 arbTexRG (Standard_False),
165 arbTexFloat (Standard_False),
166 arbSamplerObject (NULL),
167 arbTexBindless (NULL),
169 arbTboRGB32 (Standard_False),
174 arbSampleShading (Standard_False),
175 extFragDepth (Standard_False),
176 extDrawBuffers (Standard_False),
178 extBgra(Standard_False),
179 extAnis(Standard_False),
180 extPDS (Standard_False),
181 atiMem (Standard_False),
182 nvxMem (Standard_False),
183 oesSampleVariables (Standard_False),
184 oesStdDerivatives (Standard_False),
185 mySharedResources (new OpenGl_ResourcesMap()),
186 myDelayed (new OpenGl_DelayReleaseMap()),
187 myUnusedResources (new OpenGl_ResourcesStack()),
189 myGlLibHandle (NULL),
190 myFuncs (new OpenGl_GlFunctions()),
192 myTexClamp (GL_CLAMP_TO_EDGE),
194 myMaxTexCombined (1),
195 myMaxTexUnitsFFP (1),
196 myMaxDumpSizeX (1024),
197 myMaxDumpSizeY (1024),
200 myMaxDrawBuffers (1),
201 myMaxColorAttachments (1),
204 myIsInitialized (Standard_False),
205 myIsStereoBuffers (Standard_False),
206 myIsGlNormalizeEnabled (Standard_False),
207 mySpriteTexUnit (Graphic3d_TextureUnit_PointSprite),
208 myHasRayTracing (Standard_False),
209 myHasRayTracingTextures (Standard_False),
210 myHasRayTracingAdaptiveSampling (Standard_False),
211 myHasRayTracingAdaptiveSamplingAtomic (Standard_False),
212 myHasPBR (Standard_False),
213 myPBREnvLUTTexUnit (Graphic3d_TextureUnit_PbrEnvironmentLUT),
214 myPBRDiffIBLMapSHTexUnit (Graphic3d_TextureUnit_PbrIblDiffuseSH),
215 myPBRSpecIBLMapTexUnit (Graphic3d_TextureUnit_PbrIblSpecular),
216 myFrameStats (new OpenGl_FrameStats()),
217 myActiveMockTextures (0),
218 #if !defined(GL_ES_VERSION_2_0)
219 myPointSpriteOrig (GL_UPPER_LEFT),
220 myRenderMode (GL_RENDER),
221 myPolygonMode (GL_FILL),
223 myPointSpriteOrig (0),
227 myToCullBackFaces (false),
229 myDrawBuffers (0, 7),
232 myAlphaToCoverage (false),
233 myIsGlDebugCtx (false),
234 myIsSRgbWindow (false),
235 myResolution (Graphic3d_RenderingParams::THE_DEFAULT_RESOLUTION),
236 myResolutionRatio (1.0f),
237 myLineWidthScale (1.0f),
238 myLineFeather (1.0f),
239 myRenderScale (1.0f),
240 myRenderScaleInv (1.0f)
246 myViewportVirt[0] = 0;
247 myViewportVirt[1] = 0;
248 myViewportVirt[2] = 0;
249 myViewportVirt[3] = 0;
251 myPolygonOffset.Mode = Aspect_POM_Off;
252 myPolygonOffset.Factor = 0.0f;
253 myPolygonOffset.Units = 0.0f;
255 // system-dependent fields
256 #if defined(HAVE_EGL)
257 myDisplay = (Aspect_Display )EGL_NO_DISPLAY;
258 myWindow = (Aspect_Drawable )EGL_NO_SURFACE;
259 myGContext = (Aspect_RenderingContext )EGL_NO_CONTEXT;
260 #elif defined(_WIN32)
264 #elif defined(__APPLE__) && !defined(MACOSX_USE_GLX)
265 // Vendors can not extend functionality on this system
266 // and developers are limited to OpenGL support provided by Mac OS X SDK.
267 // We retrieve function pointers from system library
268 // to generalize extensions support on all platforms.
269 // In this way we also reach binary compatibility benefit between OS releases
270 // if some newest functionality is optionally used.
271 // Notice that GL version / extension availability checks are required
272 // because function pointers may be available but not functionality itself
273 // (depends on renderer).
274 #if defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE
276 myGlLibHandle = dlopen ("/System/Library/Frameworks/OpenGLES.framework/OpenGLES", RTLD_LAZY);
279 myGlLibHandle = dlopen ("/System/Library/Frameworks/OpenGL.framework/Versions/Current/OpenGL", RTLD_LAZY);
287 memset (myFuncs.operator->(), 0, sizeof(OpenGl_GlFunctions));
288 myShaderManager = new OpenGl_ShaderManager (this);
291 // =======================================================================
292 // function : ~OpenGl_Context
294 // =======================================================================
295 OpenGl_Context::~OpenGl_Context()
297 // release clean up queue
300 #if !defined(GL_ES_VERSION_2_0)
301 // release default VAO
302 if (myDefaultVao != 0
306 core32->glDeleteVertexArrays (1, &myDefaultVao);
311 // release mock textures
312 if (!myTextureRgbaBlack.IsNull())
314 myTextureRgbaBlack->Release (this);
315 myTextureRgbaBlack.Nullify();
317 if (!myTextureRgbaWhite.IsNull())
319 myTextureRgbaWhite->Release (this);
320 myTextureRgbaWhite.Nullify();
323 // release default FBO
324 if (!myDefaultFbo.IsNull())
326 myDefaultFbo->Release (this);
327 myDefaultFbo.Nullify();
330 // release shared resources if any
331 if (mySharedResources->GetRefCount() <= 1)
333 myShaderManager.Nullify();
334 for (NCollection_DataMap<TCollection_AsciiString, Handle(OpenGl_Resource)>::Iterator anIter (*mySharedResources);
335 anIter.More(); anIter.Next())
337 anIter.Value()->Release (this);
340 // release delayed resources added during deletion of shared resources
341 while (!myUnusedResources->IsEmpty())
343 myUnusedResources->First()->Release (this);
344 myUnusedResources->RemoveFirst();
347 else if (myShaderManager->IsSameContext (this))
349 myShaderManager->SetContext (NULL);
351 mySharedResources.Nullify();
359 #if !defined(GL_ES_VERSION_2_0)
361 glGetPointerv (GL_DEBUG_CALLBACK_USER_PARAM, &aPtr);
365 arbDbg->glDebugMessageCallback (NULL, NULL);
367 myIsGlDebugCtx = Standard_False;
371 // =======================================================================
372 // function : forcedRelease
374 // =======================================================================
375 void OpenGl_Context::forcedRelease()
378 for (NCollection_DataMap<TCollection_AsciiString, Handle(OpenGl_Resource)>::Iterator anIter (*mySharedResources);
379 anIter.More(); anIter.Next())
381 anIter.Value()->Release (this);
383 mySharedResources->Clear();
384 myShaderManager->clear();
385 myShaderManager->SetContext (NULL);
387 // release delayed resources added during deletion of shared resources
388 while (!myUnusedResources->IsEmpty())
390 myUnusedResources->First()->Release (this);
391 myUnusedResources->RemoveFirst();
395 // =======================================================================
396 // function : ResizeViewport
398 // =======================================================================
399 void OpenGl_Context::ResizeViewport (const Standard_Integer* theRect)
401 core11fwd->glViewport (theRect[0], theRect[1], theRect[2], theRect[3]);
402 myViewport[0] = theRect[0];
403 myViewport[1] = theRect[1];
404 myViewport[2] = theRect[2];
405 myViewport[3] = theRect[3];
406 if (HasRenderScale())
408 myViewportVirt[0] = Standard_Integer(theRect[0] * myRenderScaleInv);
409 myViewportVirt[1] = Standard_Integer(theRect[1] * myRenderScaleInv);
410 myViewportVirt[2] = Standard_Integer(theRect[2] * myRenderScaleInv);
411 myViewportVirt[3] = Standard_Integer(theRect[3] * myRenderScaleInv);
415 myViewportVirt[0] = theRect[0];
416 myViewportVirt[1] = theRect[1];
417 myViewportVirt[2] = theRect[2];
418 myViewportVirt[3] = theRect[3];
422 #if !defined(GL_ES_VERSION_2_0)
423 inline Standard_Integer stereoToMonoBuffer (const Standard_Integer theBuffer)
439 // =======================================================================
440 // function : SetReadBuffer
442 // =======================================================================
443 void OpenGl_Context::SetReadBuffer (const Standard_Integer theReadBuffer)
445 #if !defined(GL_ES_VERSION_2_0)
446 myReadBuffer = !myIsStereoBuffers ? stereoToMonoBuffer (theReadBuffer) : theReadBuffer;
447 if (myReadBuffer < GL_COLOR_ATTACHMENT0
450 arbFBO->glBindFramebuffer (GL_FRAMEBUFFER, OpenGl_FrameBuffer::NO_FRAMEBUFFER);
452 ::glReadBuffer (myReadBuffer);
454 (void )theReadBuffer;
458 // =======================================================================
459 // function : SetDrawBuffer
461 // =======================================================================
462 void OpenGl_Context::SetDrawBuffer (const Standard_Integer theDrawBuffer)
464 #if !defined(GL_ES_VERSION_2_0)
465 const Standard_Integer aDrawBuffer = !myIsStereoBuffers ? stereoToMonoBuffer (theDrawBuffer) : theDrawBuffer;
466 if (aDrawBuffer < GL_COLOR_ATTACHMENT0
469 arbFBO->glBindFramebuffer (GL_FRAMEBUFFER, OpenGl_FrameBuffer::NO_FRAMEBUFFER);
471 ::glDrawBuffer (aDrawBuffer);
473 myDrawBuffers.Init (GL_NONE);
474 myDrawBuffers.SetValue (0, aDrawBuffer);
476 (void )theDrawBuffer;
480 // =======================================================================
481 // function : SetDrawBuffers
483 // =======================================================================
484 void OpenGl_Context::SetDrawBuffers (const Standard_Integer theNb, const Standard_Integer* theDrawBuffers)
486 Standard_ASSERT_RETURN (hasDrawBuffers, "Multiple draw buffers feature is not supported by the context", Standard_ASSERT_DO_NOTHING());
488 if (myDrawBuffers.Length() < theNb)
490 // should actually never happen here
491 myDrawBuffers.Resize (0, theNb - 1, false);
493 myDrawBuffers.Init (GL_NONE);
495 Standard_Boolean useDefaultFbo = Standard_False;
496 for (Standard_Integer anI = 0; anI < theNb; ++anI)
498 if (theDrawBuffers[anI] < GL_COLOR_ATTACHMENT0 && theDrawBuffers[anI] != GL_NONE)
500 useDefaultFbo = Standard_True;
504 myDrawBuffers.SetValue (anI, theDrawBuffers[anI]);
507 if (arbFBO != NULL && useDefaultFbo)
509 arbFBO->glBindFramebuffer (GL_FRAMEBUFFER, OpenGl_FrameBuffer::NO_FRAMEBUFFER);
512 myFuncs->glDrawBuffers (theNb, (const GLenum*)theDrawBuffers);
515 // =======================================================================
516 // function : SetFrameBufferSRGB
518 // =======================================================================
519 void OpenGl_Context::SetFrameBufferSRGB (bool theIsFbo)
523 myIsSRgbActive = false;
526 myIsSRgbActive = ToRenderSRGB()
527 && (theIsFbo || myIsSRgbWindow);
535 core11fwd->glEnable (GL_FRAMEBUFFER_SRGB);
539 core11fwd->glDisable (GL_FRAMEBUFFER_SRGB);
543 // =======================================================================
544 // function : SetCullBackFaces
546 // =======================================================================
547 void OpenGl_Context::SetCullBackFaces (bool theToEnable)
549 if (myToCullBackFaces == theToEnable)
554 myToCullBackFaces = theToEnable;
557 //glCullFace (GL_BACK); GL_BACK by default
558 core11fwd->glEnable (GL_CULL_FACE);
562 core11fwd->glDisable (GL_CULL_FACE);
566 // =======================================================================
567 // function : FetchState
569 // =======================================================================
570 void OpenGl_Context::FetchState()
572 #if !defined(GL_ES_VERSION_2_0)
573 // cache feedback mode state
576 ::glGetIntegerv (GL_RENDER_MODE, &myRenderMode);
579 // cache read buffers state
580 ::glGetIntegerv (GL_READ_BUFFER, &myReadBuffer);
582 // cache draw buffers state
583 if (myDrawBuffers.Length() < myMaxDrawBuffers)
585 myDrawBuffers.Resize (0, myMaxDrawBuffers - 1, false);
587 myDrawBuffers.Init (GL_NONE);
589 Standard_Integer aDrawBuffer = GL_NONE;
590 if (myMaxDrawBuffers == 1)
592 ::glGetIntegerv (GL_DRAW_BUFFER, &aDrawBuffer);
593 myDrawBuffers.SetValue (0, aDrawBuffer);
597 for (Standard_Integer anI = 0; anI < myMaxDrawBuffers; ++anI)
599 ::glGetIntegerv (GL_DRAW_BUFFER0 + anI, &aDrawBuffer);
600 myDrawBuffers.SetValue (anI, aDrawBuffer);
606 // =======================================================================
609 // =======================================================================
610 void OpenGl_Context::Share (const Handle(OpenGl_Context)& theShareCtx)
612 if (!theShareCtx.IsNull())
614 mySharedResources = theShareCtx->mySharedResources;
615 myDelayed = theShareCtx->myDelayed;
616 myUnusedResources = theShareCtx->myUnusedResources;
617 myShaderManager = theShareCtx->myShaderManager;
621 #if !defined(__APPLE__) || defined(MACOSX_USE_GLX)
623 // =======================================================================
624 // function : IsCurrent
626 // =======================================================================
627 Standard_Boolean OpenGl_Context::IsCurrent() const
629 #if defined(HAVE_EGL)
630 if ((EGLDisplay )myDisplay == EGL_NO_DISPLAY
631 || (EGLContext )myGContext == EGL_NO_CONTEXT)
633 return Standard_False;
636 return (((EGLDisplay )myDisplay == eglGetCurrentDisplay())
637 && ((EGLContext )myGContext == eglGetCurrentContext())
638 && ((EGLSurface )myWindow == eglGetCurrentSurface (EGL_DRAW)));
639 #elif defined(_WIN32)
640 if (myWindowDC == NULL || myGContext == NULL)
642 return Standard_False;
644 return (( (HDC )myWindowDC == wglGetCurrentDC())
645 && ((HGLRC )myGContext == wglGetCurrentContext()));
647 if (myDisplay == NULL || myWindow == 0 || myGContext == 0)
649 return Standard_False;
652 return ( ((Display* )myDisplay == glXGetCurrentDisplay())
653 && ((GLXContext )myGContext == glXGetCurrentContext())
654 && ((GLXDrawable )myWindow == glXGetCurrentDrawable()));
658 // =======================================================================
659 // function : MakeCurrent
661 // =======================================================================
662 Standard_Boolean OpenGl_Context::MakeCurrent()
664 #if defined(HAVE_EGL)
665 if ((EGLDisplay )myDisplay == EGL_NO_DISPLAY
666 || (EGLContext )myGContext == EGL_NO_CONTEXT)
668 Standard_ProgramError_Raise_if (myIsInitialized, "OpenGl_Context::Init() should be called before!");
669 return Standard_False;
672 if (eglMakeCurrent ((EGLDisplay )myDisplay, (EGLSurface )myWindow, (EGLSurface )myWindow, (EGLContext )myGContext) != EGL_TRUE)
674 // if there is no current context it might be impossible to use glGetError() correctly
675 PushMessage (GL_DEBUG_SOURCE_WINDOW_SYSTEM, GL_DEBUG_TYPE_ERROR, 0, GL_DEBUG_SEVERITY_HIGH,
676 "eglMakeCurrent() has failed!");
677 myIsInitialized = Standard_False;
678 return Standard_False;
680 #elif defined(_WIN32)
681 if (myWindowDC == NULL || myGContext == NULL)
683 Standard_ProgramError_Raise_if (myIsInitialized, "OpenGl_Context::Init() should be called before!");
684 return Standard_False;
687 // technically it should be safe to activate already bound GL context
688 // however some drivers (Intel etc.) may FAIL doing this for unknown reason
691 myShaderManager->SetContext (this);
692 return Standard_True;
694 else if (wglMakeCurrent ((HDC )myWindowDC, (HGLRC )myGContext) != TRUE)
696 // notice that glGetError() couldn't be used here!
697 wchar_t* aMsgBuff = NULL;
698 DWORD anErrorCode = GetLastError();
699 FormatMessageW (FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
700 NULL, anErrorCode, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (wchar_t* )&aMsgBuff, 0, NULL);
701 TCollection_ExtendedString aMsg ("wglMakeCurrent() has failed. ");
702 if (aMsgBuff != NULL)
704 aMsg += (Standard_ExtString )aMsgBuff;
705 LocalFree (aMsgBuff);
707 PushMessage (GL_DEBUG_SOURCE_WINDOW_SYSTEM, GL_DEBUG_TYPE_ERROR, (unsigned int )anErrorCode, GL_DEBUG_SEVERITY_HIGH, aMsg);
708 myIsInitialized = Standard_False;
709 return Standard_False;
712 if (myDisplay == NULL || myWindow == 0 || myGContext == 0)
714 Standard_ProgramError_Raise_if (myIsInitialized, "OpenGl_Context::Init() should be called before!");
715 return Standard_False;
718 if (!glXMakeCurrent ((Display* )myDisplay, (GLXDrawable )myWindow, (GLXContext )myGContext))
720 // if there is no current context it might be impossible to use glGetError() correctly
721 PushMessage (GL_DEBUG_SOURCE_WINDOW_SYSTEM, GL_DEBUG_TYPE_ERROR, 0, GL_DEBUG_SEVERITY_HIGH,
722 "glXMakeCurrent() has failed!");
723 myIsInitialized = Standard_False;
724 return Standard_False;
727 myShaderManager->SetContext (this);
728 return Standard_True;
731 // =======================================================================
732 // function : SwapBuffers
734 // =======================================================================
735 void OpenGl_Context::SwapBuffers()
737 #if defined(HAVE_EGL)
738 if ((EGLSurface )myWindow != EGL_NO_SURFACE)
740 eglSwapBuffers ((EGLDisplay )myDisplay, (EGLSurface )myWindow);
742 #elif defined(_WIN32)
743 if ((HDC )myWindowDC != NULL)
745 ::SwapBuffers ((HDC )myWindowDC);
749 if ((Display* )myDisplay != NULL)
751 glXSwapBuffers ((Display* )myDisplay, (GLXDrawable )myWindow);
758 // =======================================================================
759 // function : SetSwapInterval
761 // =======================================================================
762 Standard_Boolean OpenGl_Context::SetSwapInterval (const Standard_Integer theInterval)
764 #if defined(HAVE_EGL)
765 if (::eglSwapInterval ((EGLDisplay )myDisplay, theInterval) == EGL_TRUE)
767 return Standard_True;
769 #elif defined(_WIN32)
770 if (myFuncs->wglSwapIntervalEXT != NULL)
772 myFuncs->wglSwapIntervalEXT (theInterval);
773 return Standard_True;
775 #elif defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE
777 #elif defined(__APPLE__)
778 if (::CGLSetParameter (CGLGetCurrentContext(), kCGLCPSwapInterval, &theInterval) == kCGLNoError)
780 return Standard_True;
783 if (theInterval == -1
784 && myFuncs->glXSwapIntervalEXT != NULL)
786 typedef int (*glXSwapIntervalEXT_t_x)(Display* theDisplay, GLXDrawable theDrawable, int theInterval);
787 glXSwapIntervalEXT_t_x aFuncPtr = (glXSwapIntervalEXT_t_x )myFuncs->glXSwapIntervalEXT;
788 aFuncPtr ((Display* )myDisplay, (GLXDrawable )myWindow, theInterval);
789 return Standard_True;
791 else if (myFuncs->glXSwapIntervalSGI != NULL)
793 myFuncs->glXSwapIntervalSGI (theInterval);
794 return Standard_True;
797 return Standard_False;
800 // =======================================================================
801 // function : findProc
803 // =======================================================================
804 void* OpenGl_Context::findProc (const char* theFuncName)
806 #if defined(HAVE_EGL)
807 return (void* )eglGetProcAddress (theFuncName);
808 #elif defined(_WIN32)
809 return (void* )wglGetProcAddress (theFuncName);
810 #elif defined(__APPLE__) && !defined(MACOSX_USE_GLX)
811 return (myGlLibHandle != NULL) ? dlsym (myGlLibHandle, theFuncName) : NULL;
813 return (void* )glXGetProcAddress ((const GLubyte* )theFuncName);
817 // =======================================================================
818 // function : CheckExtension
820 // =======================================================================
821 Standard_Boolean OpenGl_Context::CheckExtension (const char* theExtName) const
823 if (theExtName == NULL)
826 std::cerr << "CheckExtension called with NULL string!\n";
828 return Standard_False;
830 else if (caps->contextNoExtensions)
832 return Standard_False;
835 #if !defined(GL_ES_VERSION_2_0)
836 // available since OpenGL 3.0
837 // and the ONLY way to check extensions with OpenGL 3.1+ core profile
838 if (IsGlGreaterEqual (3, 0)
839 && myFuncs->glGetStringi != NULL)
842 ::glGetIntegerv (GL_NUM_EXTENSIONS, &anExtNb);
843 const size_t anExtNameLen = strlen (theExtName);
844 for (GLint anIter = 0; anIter < anExtNb; ++anIter)
846 const char* anExtension = (const char* )myFuncs->glGetStringi (GL_EXTENSIONS, (GLuint )anIter);
847 const size_t aTestExtNameLen = strlen (anExtension);
848 if (aTestExtNameLen == anExtNameLen
849 && strncmp (anExtension, theExtName, anExtNameLen) == 0)
851 return Standard_True;
854 return Standard_False;
858 // use old way with huge string for all extensions
859 const char* anExtString = (const char* )glGetString (GL_EXTENSIONS);
860 if (anExtString == NULL)
862 Messenger()->Send ("TKOpenGL: glGetString (GL_EXTENSIONS) has returned NULL! No GL context?", Message_Warning);
863 return Standard_False;
865 return CheckExtension (anExtString, theExtName);
868 // =======================================================================
869 // function : CheckExtension
871 // =======================================================================
872 Standard_Boolean OpenGl_Context::CheckExtension (const char* theExtString,
873 const char* theExtName)
875 if (theExtString == NULL)
877 return Standard_False;
880 // Search for theExtName in the extensions string.
881 // Use of strstr() is not sufficient because extension names can be prefixes of other extension names.
882 char* aPtrIter = (char* )theExtString;
883 const char* aPtrEnd = aPtrIter + strlen (theExtString);
884 const size_t anExtNameLen = strlen (theExtName);
885 while (aPtrIter < aPtrEnd)
887 const size_t n = strcspn (aPtrIter, " ");
888 if ((n == anExtNameLen) && (strncmp (aPtrIter, theExtName, anExtNameLen) == 0))
890 return Standard_True;
894 return Standard_False;
897 #if !defined(__APPLE__) || defined(MACOSX_USE_GLX)
899 // =======================================================================
902 // =======================================================================
903 Standard_Boolean OpenGl_Context::Init (const Standard_Boolean theIsCoreProfile)
907 return Standard_True;
910 #if defined(HAVE_EGL)
911 myDisplay = (Aspect_Display )eglGetCurrentDisplay();
912 myGContext = (Aspect_RenderingContext )eglGetCurrentContext();
913 myWindow = (Aspect_Drawable )eglGetCurrentSurface(EGL_DRAW);
914 #elif defined(_WIN32)
915 myWindowDC = (Aspect_Handle )wglGetCurrentDC();
916 myGContext = (Aspect_RenderingContext )wglGetCurrentContext();
918 myDisplay = (Aspect_Display )glXGetCurrentDisplay();
919 myGContext = (Aspect_RenderingContext )glXGetCurrentContext();
920 myWindow = (Aspect_Drawable )glXGetCurrentDrawable();
922 if (myGContext == NULL)
924 return Standard_False;
927 init (theIsCoreProfile);
928 myIsInitialized = Standard_True;
929 return Standard_True;
934 // =======================================================================
937 // =======================================================================
938 #if defined(HAVE_EGL)
939 Standard_Boolean OpenGl_Context::Init (const Aspect_Drawable theEglSurface,
940 const Aspect_Display theEglDisplay,
941 const Aspect_RenderingContext theEglContext,
942 const Standard_Boolean theIsCoreProfile)
943 #elif defined(_WIN32)
944 Standard_Boolean OpenGl_Context::Init (const Aspect_Handle theWindow,
945 const Aspect_Handle theWindowDC,
946 const Aspect_RenderingContext theGContext,
947 const Standard_Boolean theIsCoreProfile)
948 #elif defined(__APPLE__) && !defined(MACOSX_USE_GLX)
950 #if defined(TARGET_OS_IPHONE) && TARGET_OS_IPHONE
951 Standard_Boolean OpenGl_Context::Init (EAGLContext* theGContext,
952 const Standard_Boolean theIsCoreProfile)
954 Standard_Boolean OpenGl_Context::Init (NSOpenGLContext* theGContext,
955 const Standard_Boolean theIsCoreProfile)
959 Standard_Boolean OpenGl_Context::Init (const Aspect_Drawable theWindow,
960 const Aspect_Display theDisplay,
961 const Aspect_RenderingContext theGContext,
962 const Standard_Boolean theIsCoreProfile)
965 Standard_ProgramError_Raise_if (myIsInitialized, "OpenGl_Context::Init() should be called only once!");
966 #if defined(HAVE_EGL)
967 myWindow = theEglSurface;
968 myGContext = theEglContext;
969 myDisplay = theEglDisplay;
970 #elif defined(_WIN32)
971 myWindow = theWindow;
972 myGContext = theGContext;
973 myWindowDC = theWindowDC;
974 #elif defined(__APPLE__) && !defined(MACOSX_USE_GLX)
975 myGContext = theGContext;
977 myWindow = theWindow;
978 myGContext = theGContext;
979 myDisplay = theDisplay;
981 if (myGContext == NULL || !MakeCurrent())
983 return Standard_False;
986 init (theIsCoreProfile);
987 myIsInitialized = Standard_True;
988 return Standard_True;
991 // =======================================================================
992 // function : ResetErrors
994 // =======================================================================
995 bool OpenGl_Context::ResetErrors (const bool theToPrintErrors)
998 int anErr = ::glGetError();
999 const bool hasError = anErr != GL_NO_ERROR;
1000 if (!theToPrintErrors)
1002 for (; anErr != GL_NO_ERROR && aPrevErr != anErr; aPrevErr = anErr, anErr = ::glGetError())
1009 for (; anErr != GL_NO_ERROR && aPrevErr != anErr; aPrevErr = anErr, anErr = ::glGetError())
1011 TCollection_ExtendedString anErrId;
1014 case GL_INVALID_ENUM: anErrId = "GL_INVALID_ENUM"; break;
1015 case GL_INVALID_VALUE: anErrId = "GL_INVALID_VALUE"; break;
1016 case GL_INVALID_OPERATION: anErrId = "GL_INVALID_OPERATION"; break;
1017 #ifdef GL_STACK_OVERFLOW
1018 case GL_STACK_OVERFLOW: anErrId = "GL_STACK_OVERFLOW"; break;
1019 case GL_STACK_UNDERFLOW: anErrId = "GL_STACK_UNDERFLOW"; break;
1021 case GL_OUT_OF_MEMORY: anErrId = "GL_OUT_OF_MEMORY"; break;
1022 case GL_INVALID_FRAMEBUFFER_OPERATION:
1023 anErrId = "GL_INVALID_FRAMEBUFFER_OPERATION";
1026 anErrId = TCollection_ExtendedString("#") + anErr;
1030 const TCollection_ExtendedString aMsg = TCollection_ExtendedString ("Unhandled GL error: ") + anErrId;
1031 PushMessage (GL_DEBUG_SOURCE_APPLICATION, GL_DEBUG_TYPE_OTHER, 0, GL_DEBUG_SEVERITY_LOW, aMsg);
1036 // =======================================================================
1037 // function : ReadGlVersion
1039 // =======================================================================
1040 void OpenGl_Context::ReadGlVersion (Standard_Integer& theGlVerMajor,
1041 Standard_Integer& theGlVerMinor)
1047 bool toCheckVer3 = true;
1048 #if defined(__EMSCRIPTEN__)
1049 // WebGL 1.0 prints annoying invalid enumeration warnings to console.
1050 toCheckVer3 = false;
1051 if (EMSCRIPTEN_WEBGL_CONTEXT_HANDLE aWebGlCtx = emscripten_webgl_get_current_context())
1053 EmscriptenWebGLContextAttributes anAttribs = {};
1054 if (emscripten_webgl_get_context_attributes (aWebGlCtx, &anAttribs) == EMSCRIPTEN_RESULT_SUCCESS)
1056 toCheckVer3 = anAttribs.majorVersion >= 2;
1061 // Available since OpenGL 3.0 and OpenGL ES 3.0.
1064 GLint aMajor = 0, aMinor = 0;
1065 glGetIntegerv (GL_MAJOR_VERSION, &aMajor);
1066 glGetIntegerv (GL_MINOR_VERSION, &aMinor);
1067 // glGetError() sometimes does not report an error here even if
1068 // GL does not know GL_MAJOR_VERSION and GL_MINOR_VERSION constants.
1069 // This happens on some renderers like e.g. Cygwin MESA.
1070 // Thus checking additionally if GL has put anything to
1071 // the output variables.
1072 if (::glGetError() == GL_NO_ERROR && aMajor != 0 && aMinor != 0)
1074 theGlVerMajor = aMajor;
1075 theGlVerMinor = aMinor;
1078 for (GLenum anErr = ::glGetError(), aPrevErr = GL_NO_ERROR;; aPrevErr = anErr, anErr = ::glGetError())
1080 if (anErr == GL_NO_ERROR
1081 || anErr == aPrevErr)
1088 // Read version string.
1089 // Notice that only first two numbers split by point '2.1 XXXXX' are significant.
1090 // Following trash (after space) is vendor-specific.
1091 // New drivers also returns micro version of GL like '3.3.0' which has no meaning
1092 // and should be considered as vendor-specific too.
1093 const char* aVerStr = (const char* )glGetString (GL_VERSION);
1094 if (aVerStr == NULL || *aVerStr == '\0')
1096 // invalid GL context
1100 //#if defined(GL_ES_VERSION_2_0)
1101 // skip "OpenGL ES-** " section
1102 for (; *aVerStr != '\0'; ++aVerStr)
1104 if (*aVerStr >= '0' && *aVerStr <= '9')
1111 // parse string for major number
1114 size_t aMajIter = 0;
1115 while (aVerStr[aMajIter] >= '0' && aVerStr[aMajIter] <= '9')
1119 if (aMajIter == 0 || aMajIter >= sizeof(aMajorStr))
1123 memcpy (aMajorStr, aVerStr, aMajIter);
1124 aMajorStr[aMajIter] = '\0';
1126 // parse string for minor number
1127 aVerStr += aMajIter + 1;
1128 size_t aMinIter = 0;
1129 while (aVerStr[aMinIter] >= '0' && aVerStr[aMinIter] <= '9')
1133 if (aMinIter == 0 || aMinIter >= sizeof(aMinorStr))
1137 memcpy (aMinorStr, aVerStr, aMinIter);
1138 aMinorStr[aMinIter] = '\0';
1141 theGlVerMajor = atoi (aMajorStr);
1142 theGlVerMinor = atoi (aMinorStr);
1144 if (theGlVerMajor <= 0)
1151 static Standard_CString THE_DBGMSG_UNKNOWN = "UNKNOWN";
1152 static Standard_CString THE_DBGMSG_SOURCES[] =
1154 ".OpenGL", // GL_DEBUG_SOURCE_API
1155 ".WinSystem", // GL_DEBUG_SOURCE_WINDOW_SYSTEM
1156 ".GLSL", // GL_DEBUG_SOURCE_SHADER_COMPILER
1157 ".3rdParty", // GL_DEBUG_SOURCE_THIRD_PARTY
1158 "", // GL_DEBUG_SOURCE_APPLICATION
1159 ".Other" // GL_DEBUG_SOURCE_OTHER
1162 static Standard_CString THE_DBGMSG_TYPES[] =
1164 "Error", // GL_DEBUG_TYPE_ERROR
1165 "Deprecated", // GL_DEBUG_TYPE_DEPRECATED_BEHAVIOR
1166 "Undef. behavior", // GL_DEBUG_TYPE_UNDEFINED_BEHAVIOR
1167 "Portability", // GL_DEBUG_TYPE_PORTABILITY
1168 "Performance", // GL_DEBUG_TYPE_PERFORMANCE
1169 "Other" // GL_DEBUG_TYPE_OTHER
1172 static Standard_CString THE_DBGMSG_SEV_HIGH = "High"; // GL_DEBUG_SEVERITY_HIGH
1173 static Standard_CString THE_DBGMSG_SEV_MEDIUM = "Medium"; // GL_DEBUG_SEVERITY_MEDIUM
1174 static Standard_CString THE_DBGMSG_SEV_LOW = "Low"; // GL_DEBUG_SEVERITY_LOW
1176 //! Callback for GL_ARB_debug_output extension
1177 static void APIENTRY debugCallbackWrap(unsigned int theSource,
1178 unsigned int theType,
1180 unsigned int theSeverity,
1182 const char* theMessage,
1183 const void* theUserParam)
1185 OpenGl_Context* aCtx = (OpenGl_Context* )theUserParam;
1186 aCtx->PushMessage (theSource, theType, theId, theSeverity, theMessage);
1189 // =======================================================================
1190 // function : PushMessage
1192 // =======================================================================
1193 void OpenGl_Context::PushMessage (const unsigned int theSource,
1194 const unsigned int theType,
1195 const unsigned int theId,
1196 const unsigned int theSeverity,
1197 const TCollection_ExtendedString& theMessage)
1199 if (caps->suppressExtraMsg
1200 && theSource >= GL_DEBUG_SOURCE_API
1201 && theSource <= GL_DEBUG_SOURCE_OTHER
1202 && myFilters[theSource - GL_DEBUG_SOURCE_API].Contains (theId))
1207 Standard_CString& aSrc = (theSource >= GL_DEBUG_SOURCE_API
1208 && theSource <= GL_DEBUG_SOURCE_OTHER)
1209 ? THE_DBGMSG_SOURCES[theSource - GL_DEBUG_SOURCE_API]
1210 : THE_DBGMSG_UNKNOWN;
1211 Standard_CString& aType = (theType >= GL_DEBUG_TYPE_ERROR
1212 && theType <= GL_DEBUG_TYPE_OTHER)
1213 ? THE_DBGMSG_TYPES[theType - GL_DEBUG_TYPE_ERROR]
1214 : THE_DBGMSG_UNKNOWN;
1215 Standard_CString& aSev = theSeverity == GL_DEBUG_SEVERITY_HIGH
1216 ? THE_DBGMSG_SEV_HIGH
1217 : (theSeverity == GL_DEBUG_SEVERITY_MEDIUM
1218 ? THE_DBGMSG_SEV_MEDIUM
1219 : THE_DBGMSG_SEV_LOW);
1220 Message_Gravity aGrav = theSeverity == GL_DEBUG_SEVERITY_HIGH
1222 : (theSeverity == GL_DEBUG_SEVERITY_MEDIUM
1226 TCollection_ExtendedString aMsg;
1227 aMsg += "TKOpenGl"; aMsg += aSrc;
1228 aMsg += " | Type: "; aMsg += aType;
1229 aMsg += " | ID: "; aMsg += (Standard_Integer )theId;
1230 aMsg += " | Severity: "; aMsg += aSev;
1231 aMsg += " | Message:\n ";
1233 Messenger()->Send (aMsg, aGrav);
1236 // =======================================================================
1237 // function : ExcludeMessage
1239 // ======================================================================
1240 Standard_Boolean OpenGl_Context::ExcludeMessage (const unsigned int theSource,
1241 const unsigned int theId)
1243 return theSource >= GL_DEBUG_SOURCE_API
1244 && theSource <= GL_DEBUG_SOURCE_OTHER
1245 && myFilters[theSource - GL_DEBUG_SOURCE_API].Add (theId);
1248 // =======================================================================
1249 // function : IncludeMessage
1251 // ======================================================================
1252 Standard_Boolean OpenGl_Context::IncludeMessage (const unsigned int theSource,
1253 const unsigned int theId)
1255 return theSource >= GL_DEBUG_SOURCE_API
1256 && theSource <= GL_DEBUG_SOURCE_OTHER
1257 && myFilters[theSource - GL_DEBUG_SOURCE_API].Remove (theId);
1260 // =======================================================================
1261 // function : checkWrongVersion
1263 // ======================================================================
1264 void OpenGl_Context::checkWrongVersion (Standard_Integer theGlVerMajor, Standard_Integer theGlVerMinor,
1265 const char* theLastFailedProc)
1267 if (!IsGlGreaterEqual (theGlVerMajor, theGlVerMinor))
1272 PushMessage (GL_DEBUG_SOURCE_APPLICATION, GL_DEBUG_TYPE_ERROR, 0, GL_DEBUG_SEVERITY_HIGH,
1273 TCollection_AsciiString()
1274 + "Error! OpenGL context reports version "
1275 + myGlVerMajor + "." + myGlVerMinor
1276 + " but does not export required functions for " + theGlVerMajor + "." + theGlVerMinor
1277 + " (" + (theLastFailedProc != NULL ? theLastFailedProc : "") + ")\n"
1278 + "Please report this issue to OpenGL driver vendor '" + myVendor + "'");
1280 // lower internal version
1281 if (theGlVerMinor > 0)
1283 myGlVerMajor = theGlVerMajor;
1284 myGlVerMinor = theGlVerMinor - 1;
1287 #if defined(GL_ES_VERSION_2_0)
1288 switch (theGlVerMajor)
1290 case 3: myGlVerMajor = 2; myGlVerMinor = 0; return;
1293 switch (theGlVerMajor)
1295 case 2: myGlVerMajor = 1; myGlVerMinor = 5; return;
1296 case 3: myGlVerMajor = 2; myGlVerMinor = 1; return;
1297 case 4: myGlVerMajor = 3; myGlVerMinor = 3; return;
1302 // =======================================================================
1305 // =======================================================================
1306 void OpenGl_Context::init (const Standard_Boolean theIsCoreProfile)
1311 myMaxMsaaSamples = 0;
1312 myMaxDrawBuffers = 1;
1313 myMaxColorAttachments = 1;
1314 ReadGlVersion (myGlVerMajor, myGlVerMinor);
1315 myVendor = (const char* )::glGetString (GL_VENDOR);
1316 myVendor.LowerCase();
1318 if (caps->contextMajorVersionUpper != -1)
1320 // synthetically restrict OpenGL version for testing
1321 Standard_Integer aCtxVer[2] = { myGlVerMajor, myGlVerMinor };
1322 bool isLowered = false;
1323 if (myGlVerMajor > caps->contextMajorVersionUpper)
1326 myGlVerMajor = caps->contextMajorVersionUpper;
1327 #if defined(GL_ES_VERSION_2_0)
1328 switch (myGlVerMajor)
1330 case 2: myGlVerMinor = 0; break;
1333 switch (myGlVerMajor)
1335 case 1: myGlVerMinor = 5; break;
1336 case 2: myGlVerMinor = 1; break;
1337 case 3: myGlVerMinor = 3; break;
1341 if (caps->contextMinorVersionUpper != -1
1342 && myGlVerMinor > caps->contextMinorVersionUpper)
1345 myGlVerMinor = caps->contextMinorVersionUpper;
1349 PushMessage (GL_DEBUG_SOURCE_APPLICATION, GL_DEBUG_TYPE_PORTABILITY, 0, GL_DEBUG_SEVERITY_MEDIUM,
1350 TCollection_AsciiString ("OpenGL version ") + aCtxVer[0] + "." + aCtxVer[1]
1351 + " has been lowered to " + myGlVerMajor + "." + myGlVerMinor);
1355 if (!caps->ffpEnable
1356 && !IsGlGreaterEqual (2, 0))
1358 caps->ffpEnable = true;
1359 TCollection_ExtendedString aMsg =
1360 TCollection_ExtendedString("OpenGL driver is too old! Context info:\n")
1361 + " Vendor: " + (const char* )::glGetString (GL_VENDOR) + "\n"
1362 + " Renderer: " + (const char* )::glGetString (GL_RENDERER) + "\n"
1363 + " Version: " + (const char* )::glGetString (GL_VERSION) + "\n"
1364 + " Fallback using deprecated fixed-function pipeline.\n"
1365 + " Visualization might work incorrectly.\n"
1366 " Consider upgrading the graphics driver.";
1367 PushMessage (GL_DEBUG_SOURCE_APPLICATION, GL_DEBUG_TYPE_PORTABILITY, 0, GL_DEBUG_SEVERITY_HIGH, aMsg);
1370 #if defined(GL_ES_VERSION_2_0)
1371 (void )theIsCoreProfile;
1372 const bool isCoreProfile = false;
1375 if (myVendor.Search ("nvidia") != -1)
1377 // Buffer detailed info: Buffer object 1 (bound to GL_ARRAY_BUFFER_ARB, usage hint is GL_STATIC_DRAW)
1378 // will use VIDEO memory as the source for buffer object operations.
1379 ExcludeMessage (GL_DEBUG_SOURCE_API, 131185);
1381 if (IsGlGreaterEqual (3, 0))
1383 // retrieve auxiliary function in advance
1384 FindProc ("glGetStringi", myFuncs->glGetStringi);
1387 bool isCoreProfile = false;
1388 if (IsGlGreaterEqual (3, 2))
1390 isCoreProfile = (theIsCoreProfile == Standard_True);
1392 // detect Core profile
1396 ::glGetIntegerv (GL_CONTEXT_PROFILE_MASK, &aProfile);
1397 isCoreProfile = (aProfile & GL_CONTEXT_CORE_PROFILE_BIT) != 0;
1405 core11 = (OpenGl_GlCore11* )(&(*myFuncs));
1407 core11fwd = (OpenGl_GlCore11Fwd* )(&(*myFuncs));
1427 arbTboRGB32 = Standard_False;
1435 //! Make record shorter to retrieve function pointer using variable with same name
1436 const char* aLastFailedProc = NULL;
1437 #define FindProcShort(theFunc) FindProcVerbose(aLastFailedProc, #theFunc, myFuncs->theFunc)
1439 #if defined(GL_ES_VERSION_2_0)
1441 hasTexRGBA8 = IsGlGreaterEqual (3, 0)
1442 || CheckExtension ("GL_OES_rgb8_rgba8");
1443 hasTexSRGB = IsGlGreaterEqual (3, 0);
1444 hasFboSRGB = IsGlGreaterEqual (3, 0);
1445 hasSRGBControl = CheckExtension ("GL_EXT_sRGB_write_control");
1446 // NPOT textures has limited support within OpenGL ES 2.0
1447 // which are relaxed by OpenGL ES 3.0 or some extensions
1448 //arbNPTW = IsGlGreaterEqual (3, 0)
1449 // || CheckExtension ("GL_OES_texture_npot")
1450 // || CheckExtension ("GL_NV_texture_npot_2D_mipmap");
1451 arbNPTW = Standard_True;
1452 arbTexRG = IsGlGreaterEqual (3, 0)
1453 || CheckExtension ("GL_EXT_texture_rg");
1454 extBgra = CheckExtension ("GL_EXT_texture_format_BGRA8888");
1455 extAnis = CheckExtension ("GL_EXT_texture_filter_anisotropic");
1456 extPDS = IsGlGreaterEqual (3, 0)
1457 || CheckExtension ("GL_OES_packed_depth_stencil");
1458 #ifdef __EMSCRIPTEN__
1460 && checkEnableWebGlExtension (*this, "GL_WEBGL_depth_texture"))
1462 extPDS = true; // WebGL 1.0 extension (in WebGL 2.0 core)
1466 core11fwd = (OpenGl_GlCore11Fwd* )(&(*myFuncs));
1467 if (IsGlGreaterEqual (2, 0))
1469 // enable compatible functions
1470 core20 = (OpenGl_GlCore20* )(&(*myFuncs));
1471 core20fwd = (OpenGl_GlCore20Fwd* )(&(*myFuncs));
1472 core15fwd = (OpenGl_GlCore15Fwd* )(&(*myFuncs));
1473 arbFBO = (OpenGl_ArbFBO* )(&(*myFuncs));
1475 if (IsGlGreaterEqual (3, 0)
1476 && FindProcShort (glBlitFramebuffer))
1478 arbFBOBlit = (OpenGl_ArbFBOBlit* )(&(*myFuncs));
1480 if (IsGlGreaterEqual (3, 0)
1481 && FindProcShort (glGenSamplers)
1482 && FindProcShort (glDeleteSamplers)
1483 && FindProcShort (glIsSampler)
1484 && FindProcShort (glBindSampler)
1485 && FindProcShort (glSamplerParameteri)
1486 && FindProcShort (glSamplerParameteriv)
1487 && FindProcShort (glSamplerParameterf)
1488 && FindProcShort (glSamplerParameterfv)
1489 && FindProcShort (glGetSamplerParameteriv)
1490 && FindProcShort (glGetSamplerParameterfv))
1491 //&& FindProcShort (glSamplerParameterIiv) // only on Desktop or with extensions GL_OES_texture_border_clamp/GL_EXT_texture_border_clamp
1492 //&& FindProcShort (glSamplerParameterIuiv)
1493 //&& FindProcShort (glGetSamplerParameterIiv)
1494 //&& FindProcShort (glGetSamplerParameterIuiv))
1496 arbSamplerObject = (OpenGl_ArbSamplerObject* )(&(*myFuncs));
1498 extFragDepth = !IsGlGreaterEqual(3, 0)
1499 && CheckExtension ("GL_EXT_frag_depth");
1500 if (IsGlGreaterEqual (3, 1)
1501 && FindProcShort (glTexStorage2DMultisample))
1503 // MSAA RenderBuffers have been defined in OpenGL ES 3.0,
1504 // but MSAA Textures - only in OpenGL ES 3.1+
1505 ::glGetIntegerv (GL_MAX_SAMPLES, &myMaxMsaaSamples);
1508 hasUintIndex = IsGlGreaterEqual (3, 0)
1509 || CheckExtension ("GL_OES_element_index_uint");
1510 hasHighp = CheckExtension ("GL_OES_fragment_precision_high");
1511 GLint aRange[2] = {0, 0};
1513 ::glGetShaderPrecisionFormat (GL_FRAGMENT_SHADER, GL_HIGH_FLOAT, aRange, &aPrec);
1516 hasHighp = Standard_True;
1519 arbTexFloat = IsGlGreaterEqual (3, 0)
1520 && FindProcShort (glTexImage3D);
1521 hasTexFloatLinear = arbTexFloat
1522 && CheckExtension ("GL_OES_texture_float_linear");
1524 const Standard_Boolean hasTexBuffer32 = IsGlGreaterEqual (3, 2) && FindProcShort (glTexBuffer);
1525 const Standard_Boolean hasExtTexBuffer = CheckExtension ("GL_EXT_texture_buffer") && FindProc ("glTexBufferEXT", myFuncs->glTexBuffer);
1527 if (hasTexBuffer32 || hasExtTexBuffer)
1529 arbTBO = reinterpret_cast<OpenGl_ArbTBO*> (myFuncs.get());
1532 // initialize debug context extension
1533 if (CheckExtension ("GL_KHR_debug"))
1535 // this functionality become a part of OpenGL ES 3.2
1537 // According to GL_KHR_debug spec, all functions should have KHR suffix.
1538 // However, some implementations can export these functions without suffix.
1539 if (FindProc ("glDebugMessageControlKHR", myFuncs->glDebugMessageControl)
1540 && FindProc ("glDebugMessageInsertKHR", myFuncs->glDebugMessageInsert)
1541 && FindProc ("glDebugMessageCallbackKHR", myFuncs->glDebugMessageCallback)
1542 && FindProc ("glGetDebugMessageLogKHR", myFuncs->glGetDebugMessageLog))
1544 arbDbg = (OpenGl_ArbDbg* )(&(*myFuncs));
1548 && caps->contextDebug)
1550 // setup default callback
1551 myIsGlDebugCtx = Standard_True;
1552 arbDbg->glDebugMessageCallback (debugCallbackWrap, this);
1553 ::glEnable (GL_DEBUG_OUTPUT);
1554 if (caps->contextSyncDebug)
1556 // note that some broken implementations (e.g. simulators) might generate error message on this call
1557 ::glEnable (GL_DEBUG_OUTPUT_SYNCHRONOUS);
1562 extDrawBuffers = CheckExtension ("GL_EXT_draw_buffers") && FindProc ("glDrawBuffersEXT", myFuncs->glDrawBuffers);
1563 arbDrawBuffers = CheckExtension ("GL_ARB_draw_buffers") && FindProc ("glDrawBuffersARB", myFuncs->glDrawBuffers);
1565 if (IsGlGreaterEqual (3, 0) && FindProcShort (glDrawBuffers))
1567 hasDrawBuffers = OpenGl_FeatureInCore;
1569 else if (extDrawBuffers || arbDrawBuffers)
1571 hasDrawBuffers = OpenGl_FeatureInExtensions;
1574 hasFloatBuffer = IsGlGreaterEqual (3, 2) ? OpenGl_FeatureInCore :
1575 CheckExtension ("GL_EXT_color_buffer_float") ? OpenGl_FeatureInExtensions
1576 : OpenGl_FeatureNotAvailable;
1577 hasHalfFloatBuffer = IsGlGreaterEqual (3, 2) ? OpenGl_FeatureInCore :
1578 CheckExtension ("GL_EXT_color_buffer_half_float") ? OpenGl_FeatureInExtensions
1579 : OpenGl_FeatureNotAvailable;
1581 oesSampleVariables = CheckExtension ("GL_OES_sample_variables");
1582 oesStdDerivatives = CheckExtension ("GL_OES_standard_derivatives");
1583 hasSampleVariables = IsGlGreaterEqual (3, 2) ? OpenGl_FeatureInCore :
1584 oesSampleVariables ? OpenGl_FeatureInExtensions
1585 : OpenGl_FeatureNotAvailable;
1586 hasGlslBitwiseOps = IsGlGreaterEqual (3, 0)
1587 ? OpenGl_FeatureInCore
1588 : OpenGl_FeatureNotAvailable;
1589 // without hasHighp, dFdx/dFdy precision is considered too low for flat shading (visual artifacts)
1590 hasFlatShading = IsGlGreaterEqual (3, 0)
1591 ? OpenGl_FeatureInCore
1592 : (oesStdDerivatives && hasHighp
1593 ? OpenGl_FeatureInExtensions
1594 : OpenGl_FeatureNotAvailable);
1595 if (!IsGlGreaterEqual (3, 1)
1596 && myVendor.Search("qualcomm") != -1)
1598 // dFdx/dFdy are completely broken on tested Adreno devices with versions below OpenGl ES 3.1
1599 hasFlatShading = OpenGl_FeatureNotAvailable;
1602 hasGeometryStage = IsGlGreaterEqual (3, 2)
1603 ? OpenGl_FeatureInCore
1604 : (CheckExtension ("GL_EXT_geometry_shader") && CheckExtension ("GL_EXT_shader_io_blocks")
1605 ? OpenGl_FeatureInExtensions
1606 : OpenGl_FeatureNotAvailable);
1609 myTexClamp = IsGlGreaterEqual (1, 2) ? GL_CLAMP_TO_EDGE : GL_CLAMP;
1611 hasTexRGBA8 = Standard_True;
1612 hasTexSRGB = IsGlGreaterEqual (2, 0);
1613 hasFboSRGB = IsGlGreaterEqual (2, 1);
1614 hasSRGBControl = hasFboSRGB;
1615 arbDrawBuffers = CheckExtension ("GL_ARB_draw_buffers");
1616 arbNPTW = CheckExtension ("GL_ARB_texture_non_power_of_two");
1617 arbTexFloat = IsGlGreaterEqual (3, 0)
1618 || CheckExtension ("GL_ARB_texture_float");
1619 hasTexFloatLinear = arbTexFloat;
1620 arbSampleShading = CheckExtension ("GL_ARB_sample_shading");
1621 extBgra = CheckExtension ("GL_EXT_bgra");
1622 extAnis = CheckExtension ("GL_EXT_texture_filter_anisotropic");
1623 extPDS = CheckExtension ("GL_EXT_packed_depth_stencil");
1624 atiMem = CheckExtension ("GL_ATI_meminfo");
1625 nvxMem = CheckExtension ("GL_NVX_gpu_memory_info");
1627 hasDrawBuffers = IsGlGreaterEqual (2, 0) ? OpenGl_FeatureInCore :
1628 arbDrawBuffers ? OpenGl_FeatureInExtensions
1629 : OpenGl_FeatureNotAvailable;
1631 hasGlslBitwiseOps = IsGlGreaterEqual (3, 0)
1632 ? OpenGl_FeatureInCore
1633 : CheckExtension ("GL_EXT_gpu_shader4")
1634 ? OpenGl_FeatureInExtensions
1635 : OpenGl_FeatureNotAvailable;
1637 hasFloatBuffer = hasHalfFloatBuffer = IsGlGreaterEqual (3, 0) ? OpenGl_FeatureInCore :
1638 CheckExtension ("GL_ARB_color_buffer_float") ? OpenGl_FeatureInExtensions
1639 : OpenGl_FeatureNotAvailable;
1641 hasGeometryStage = IsGlGreaterEqual (3, 2)
1642 ? OpenGl_FeatureInCore
1643 : OpenGl_FeatureNotAvailable;
1645 hasSampleVariables = IsGlGreaterEqual (4, 0) ? OpenGl_FeatureInCore :
1646 arbSampleShading ? OpenGl_FeatureInExtensions
1647 : OpenGl_FeatureNotAvailable;
1649 GLint aStereo = GL_FALSE;
1650 glGetIntegerv (GL_STEREO, &aStereo);
1651 myIsStereoBuffers = aStereo == 1;
1653 // get number of maximum clipping planes
1654 glGetIntegerv (GL_MAX_CLIP_PLANES, &myMaxClipPlanes);
1659 glGetIntegerv (GL_MAX_DRAW_BUFFERS, &myMaxDrawBuffers);
1660 glGetIntegerv (GL_MAX_COLOR_ATTACHMENTS, &myMaxColorAttachments);
1661 if (myDrawBuffers.Length() < myMaxDrawBuffers)
1663 myDrawBuffers.Resize (0, myMaxDrawBuffers - 1, false);
1667 glGetIntegerv (GL_MAX_TEXTURE_SIZE, &myMaxTexDim);
1668 #if !defined(GL_ES_VERSION_2_0)
1669 if (IsGlGreaterEqual (1, 3) && core11 != NULL)
1671 // this is a maximum of texture units for FFP functionality,
1672 // usually smaller than combined texture units available for GLSL
1673 glGetIntegerv (GL_MAX_TEXTURE_UNITS, &myMaxTexUnitsFFP);
1674 myMaxTexCombined = myMaxTexUnitsFFP;
1677 if (IsGlGreaterEqual (2, 0))
1679 glGetIntegerv (GL_MAX_COMBINED_TEXTURE_IMAGE_UNITS, &myMaxTexCombined);
1681 mySpriteTexUnit = myMaxTexCombined >= 2
1682 ? Graphic3d_TextureUnit_PointSprite
1683 : Graphic3d_TextureUnit_0;
1685 GLint aMaxVPortSize[2] = {0, 0};
1686 glGetIntegerv (GL_MAX_VIEWPORT_DIMS, aMaxVPortSize);
1687 myMaxDumpSizeX = Min (aMaxVPortSize[0], myMaxTexDim);
1688 myMaxDumpSizeY = Min (aMaxVPortSize[1], myMaxTexDim);
1689 if (myVendor == "intel")
1691 // Intel drivers have known bug with empty dump for images with width>=5462
1692 myMaxDumpSizeX = Min (myMaxDumpSizeX, 4096);
1697 glGetIntegerv (GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, &myAnisoMax);
1700 myClippingState.Init();
1702 #if !defined(GL_ES_VERSION_2_0)
1721 // retrieve platform-dependent extensions
1722 #if defined(HAVE_EGL)
1724 #elif defined(_WIN32)
1725 if (FindProcShort (wglGetExtensionsStringARB))
1727 const char* aWglExts = myFuncs->wglGetExtensionsStringARB (wglGetCurrentDC());
1728 if (CheckExtension (aWglExts, "WGL_EXT_swap_control"))
1730 FindProcShort (wglSwapIntervalEXT);
1732 if (CheckExtension (aWglExts, "WGL_ARB_pixel_format"))
1734 FindProcShort (wglChoosePixelFormatARB);
1736 if (CheckExtension (aWglExts, "WGL_ARB_create_context_profile"))
1738 FindProcShort (wglCreateContextAttribsARB);
1740 if (CheckExtension (aWglExts, "WGL_NV_DX_interop"))
1742 FindProcShort (wglDXSetResourceShareHandleNV);
1743 FindProcShort (wglDXOpenDeviceNV);
1744 FindProcShort (wglDXCloseDeviceNV);
1745 FindProcShort (wglDXRegisterObjectNV);
1746 FindProcShort (wglDXUnregisterObjectNV);
1747 FindProcShort (wglDXObjectAccessNV);
1748 FindProcShort (wglDXLockObjectsNV);
1749 FindProcShort (wglDXUnlockObjectsNV);
1751 if (CheckExtension (aWglExts, "WGL_AMD_gpu_association"))
1753 FindProcShort (wglGetGPUIDsAMD);
1754 FindProcShort (wglGetGPUInfoAMD);
1755 FindProcShort (wglGetContextGPUIDAMD);
1758 #elif defined(__APPLE__)
1761 const char* aGlxExts = ::glXQueryExtensionsString ((Display* )myDisplay, DefaultScreen ((Display* )myDisplay));
1762 if (CheckExtension (aGlxExts, "GLX_EXT_swap_control"))
1764 FindProcShort (glXSwapIntervalEXT);
1766 if (CheckExtension (aGlxExts, "GLX_SGI_swap_control"))
1768 FindProcShort (glXSwapIntervalSGI);
1770 if (CheckExtension (aGlxExts, "GLX_MESA_query_renderer"))
1772 FindProcShort (glXQueryRendererIntegerMESA);
1773 FindProcShort (glXQueryCurrentRendererIntegerMESA);
1774 FindProcShort (glXQueryRendererStringMESA);
1775 FindProcShort (glXQueryCurrentRendererStringMESA);
1777 //extSwapTear = CheckExtension (aGlxExts, "GLX_EXT_swap_control_tear");
1780 // load OpenGL 1.2 new functions
1781 has12 = IsGlGreaterEqual (1, 2)
1782 && FindProcShort (glBlendColor)
1783 && FindProcShort (glBlendEquation)
1784 && FindProcShort (glDrawRangeElements)
1785 && FindProcShort (glTexImage3D)
1786 && FindProcShort (glTexSubImage3D)
1787 && FindProcShort (glCopyTexSubImage3D);
1790 checkWrongVersion (1, 2, aLastFailedProc);
1793 // load OpenGL 1.3 new functions
1794 has13 = IsGlGreaterEqual (1, 3)
1795 && FindProcShort (glActiveTexture)
1796 && FindProcShort (glSampleCoverage)
1797 && FindProcShort (glCompressedTexImage3D)
1798 && FindProcShort (glCompressedTexImage2D)
1799 && FindProcShort (glCompressedTexImage1D)
1800 && FindProcShort (glCompressedTexSubImage3D)
1801 && FindProcShort (glCompressedTexSubImage2D)
1802 && FindProcShort (glCompressedTexSubImage1D)
1803 && FindProcShort (glGetCompressedTexImage);
1808 && FindProcShort (glClientActiveTexture)
1809 && FindProcShort (glMultiTexCoord1d)
1810 && FindProcShort (glMultiTexCoord1dv)
1811 && FindProcShort (glMultiTexCoord1f)
1812 && FindProcShort (glMultiTexCoord1fv)
1813 && FindProcShort (glMultiTexCoord1i)
1814 && FindProcShort (glMultiTexCoord1iv)
1815 && FindProcShort (glMultiTexCoord1s)
1816 && FindProcShort (glMultiTexCoord1sv)
1817 && FindProcShort (glMultiTexCoord2d)
1818 && FindProcShort (glMultiTexCoord2dv)
1819 && FindProcShort (glMultiTexCoord2f)
1820 && FindProcShort (glMultiTexCoord2fv)
1821 && FindProcShort (glMultiTexCoord2i)
1822 && FindProcShort (glMultiTexCoord2iv)
1823 && FindProcShort (glMultiTexCoord2s)
1824 && FindProcShort (glMultiTexCoord2sv)
1825 && FindProcShort (glMultiTexCoord3d)
1826 && FindProcShort (glMultiTexCoord3dv)
1827 && FindProcShort (glMultiTexCoord3f)
1828 && FindProcShort (glMultiTexCoord3fv)
1829 && FindProcShort (glMultiTexCoord3i)
1830 && FindProcShort (glMultiTexCoord3iv)
1831 && FindProcShort (glMultiTexCoord3s)
1832 && FindProcShort (glMultiTexCoord3sv)
1833 && FindProcShort (glMultiTexCoord4d)
1834 && FindProcShort (glMultiTexCoord4dv)
1835 && FindProcShort (glMultiTexCoord4f)
1836 && FindProcShort (glMultiTexCoord4fv)
1837 && FindProcShort (glMultiTexCoord4i)
1838 && FindProcShort (glMultiTexCoord4iv)
1839 && FindProcShort (glMultiTexCoord4s)
1840 && FindProcShort (glMultiTexCoord4sv)
1841 && FindProcShort (glLoadTransposeMatrixf)
1842 && FindProcShort (glLoadTransposeMatrixd)
1843 && FindProcShort (glMultTransposeMatrixf)
1844 && FindProcShort (glMultTransposeMatrixd);
1848 checkWrongVersion (1, 3, aLastFailedProc);
1851 // load OpenGL 1.4 new functions
1852 has14 = IsGlGreaterEqual (1, 4)
1853 && FindProcShort (glBlendFuncSeparate)
1854 && FindProcShort (glMultiDrawArrays)
1855 && FindProcShort (glMultiDrawElements)
1856 && FindProcShort (glPointParameterf)
1857 && FindProcShort (glPointParameterfv)
1858 && FindProcShort (glPointParameteri)
1859 && FindProcShort (glPointParameteriv);
1862 checkWrongVersion (1, 4, aLastFailedProc);
1865 // load OpenGL 1.5 new functions
1866 has15 = IsGlGreaterEqual (1, 5)
1867 && FindProcShort (glGenQueries)
1868 && FindProcShort (glDeleteQueries)
1869 && FindProcShort (glIsQuery)
1870 && FindProcShort (glBeginQuery)
1871 && FindProcShort (glEndQuery)
1872 && FindProcShort (glGetQueryiv)
1873 && FindProcShort (glGetQueryObjectiv)
1874 && FindProcShort (glGetQueryObjectuiv)
1875 && FindProcShort (glBindBuffer)
1876 && FindProcShort (glDeleteBuffers)
1877 && FindProcShort (glGenBuffers)
1878 && FindProcShort (glIsBuffer)
1879 && FindProcShort (glBufferData)
1880 && FindProcShort (glBufferSubData)
1881 && FindProcShort (glGetBufferSubData)
1882 && FindProcShort (glMapBuffer)
1883 && FindProcShort (glUnmapBuffer)
1884 && FindProcShort (glGetBufferParameteriv)
1885 && FindProcShort (glGetBufferPointerv);
1890 core15 = (OpenGl_GlCore15* )(&(*myFuncs));
1892 core15fwd = (OpenGl_GlCore15Fwd* )(&(*myFuncs));
1896 checkWrongVersion (1, 5, aLastFailedProc);
1899 // load OpenGL 2.0 new functions
1900 has20 = IsGlGreaterEqual (2, 0)
1901 && FindProcShort (glBlendEquationSeparate)
1902 && FindProcShort (glDrawBuffers)
1903 && FindProcShort (glStencilOpSeparate)
1904 && FindProcShort (glStencilFuncSeparate)
1905 && FindProcShort (glStencilMaskSeparate)
1906 && FindProcShort (glAttachShader)
1907 && FindProcShort (glBindAttribLocation)
1908 && FindProcShort (glCompileShader)
1909 && FindProcShort (glCreateProgram)
1910 && FindProcShort (glCreateShader)
1911 && FindProcShort (glDeleteProgram)
1912 && FindProcShort (glDeleteShader)
1913 && FindProcShort (glDetachShader)
1914 && FindProcShort (glDisableVertexAttribArray)
1915 && FindProcShort (glEnableVertexAttribArray)
1916 && FindProcShort (glGetActiveAttrib)
1917 && FindProcShort (glGetActiveUniform)
1918 && FindProcShort (glGetAttachedShaders)
1919 && FindProcShort (glGetAttribLocation)
1920 && FindProcShort (glGetProgramiv)
1921 && FindProcShort (glGetProgramInfoLog)
1922 && FindProcShort (glGetShaderiv)
1923 && FindProcShort (glGetShaderInfoLog)
1924 && FindProcShort (glGetShaderSource)
1925 && FindProcShort (glGetUniformLocation)
1926 && FindProcShort (glGetUniformfv)
1927 && FindProcShort (glGetUniformiv)
1928 && FindProcShort (glGetVertexAttribdv)
1929 && FindProcShort (glGetVertexAttribfv)
1930 && FindProcShort (glGetVertexAttribiv)
1931 && FindProcShort (glGetVertexAttribPointerv)
1932 && FindProcShort (glIsProgram)
1933 && FindProcShort (glIsShader)
1934 && FindProcShort (glLinkProgram)
1935 && FindProcShort (glShaderSource)
1936 && FindProcShort (glUseProgram)
1937 && FindProcShort (glUniform1f)
1938 && FindProcShort (glUniform2f)
1939 && FindProcShort (glUniform3f)
1940 && FindProcShort (glUniform4f)
1941 && FindProcShort (glUniform1i)
1942 && FindProcShort (glUniform2i)
1943 && FindProcShort (glUniform3i)
1944 && FindProcShort (glUniform4i)
1945 && FindProcShort (glUniform1fv)
1946 && FindProcShort (glUniform2fv)
1947 && FindProcShort (glUniform3fv)
1948 && FindProcShort (glUniform4fv)
1949 && FindProcShort (glUniform1iv)
1950 && FindProcShort (glUniform2iv)
1951 && FindProcShort (glUniform3iv)
1952 && FindProcShort (glUniform4iv)
1953 && FindProcShort (glUniformMatrix2fv)
1954 && FindProcShort (glUniformMatrix3fv)
1955 && FindProcShort (glUniformMatrix4fv)
1956 && FindProcShort (glValidateProgram)
1957 && FindProcShort (glVertexAttrib1d)
1958 && FindProcShort (glVertexAttrib1dv)
1959 && FindProcShort (glVertexAttrib1f)
1960 && FindProcShort (glVertexAttrib1fv)
1961 && FindProcShort (glVertexAttrib1s)
1962 && FindProcShort (glVertexAttrib1sv)
1963 && FindProcShort (glVertexAttrib2d)
1964 && FindProcShort (glVertexAttrib2dv)
1965 && FindProcShort (glVertexAttrib2f)
1966 && FindProcShort (glVertexAttrib2fv)
1967 && FindProcShort (glVertexAttrib2s)
1968 && FindProcShort (glVertexAttrib2sv)
1969 && FindProcShort (glVertexAttrib3d)
1970 && FindProcShort (glVertexAttrib3dv)
1971 && FindProcShort (glVertexAttrib3f)
1972 && FindProcShort (glVertexAttrib3fv)
1973 && FindProcShort (glVertexAttrib3s)
1974 && FindProcShort (glVertexAttrib3sv)
1975 && FindProcShort (glVertexAttrib4Nbv)
1976 && FindProcShort (glVertexAttrib4Niv)
1977 && FindProcShort (glVertexAttrib4Nsv)
1978 && FindProcShort (glVertexAttrib4Nub)
1979 && FindProcShort (glVertexAttrib4Nubv)
1980 && FindProcShort (glVertexAttrib4Nuiv)
1981 && FindProcShort (glVertexAttrib4Nusv)
1982 && FindProcShort (glVertexAttrib4bv)
1983 && FindProcShort (glVertexAttrib4d)
1984 && FindProcShort (glVertexAttrib4dv)
1985 && FindProcShort (glVertexAttrib4f)
1986 && FindProcShort (glVertexAttrib4fv)
1987 && FindProcShort (glVertexAttrib4iv)
1988 && FindProcShort (glVertexAttrib4s)
1989 && FindProcShort (glVertexAttrib4sv)
1990 && FindProcShort (glVertexAttrib4ubv)
1991 && FindProcShort (glVertexAttrib4uiv)
1992 && FindProcShort (glVertexAttrib4usv)
1993 && FindProcShort (glVertexAttribPointer);
1996 const char* aGlslVer = (const char* )::glGetString (GL_SHADING_LANGUAGE_VERSION);
1997 if (aGlslVer == NULL
1998 || *aGlslVer == '\0')
2000 // broken context has been detected
2001 PushMessage (GL_DEBUG_SOURCE_APPLICATION, GL_DEBUG_TYPE_ERROR, 0, GL_DEBUG_SEVERITY_HIGH,
2002 TCollection_AsciiString("Error! OpenGL context reports version ")
2003 + myGlVerMajor + "." + myGlVerMinor + " but reports wrong GLSL version");
2011 core20 = (OpenGl_GlCore20* )(&(*myFuncs));
2013 core20fwd = (OpenGl_GlCore20Fwd* )(&(*myFuncs));
2018 checkWrongVersion (2, 0, aLastFailedProc);
2021 // load OpenGL 2.1 new functions
2022 has21 = IsGlGreaterEqual (2, 1)
2023 && FindProcShort (glUniformMatrix2x3fv)
2024 && FindProcShort (glUniformMatrix3x2fv)
2025 && FindProcShort (glUniformMatrix2x4fv)
2026 && FindProcShort (glUniformMatrix4x2fv)
2027 && FindProcShort (glUniformMatrix3x4fv)
2028 && FindProcShort (glUniformMatrix4x3fv);
2031 checkWrongVersion (2, 1, aLastFailedProc);
2034 // load GL_ARB_framebuffer_object (added to OpenGL 3.0 core)
2035 const bool hasFBO = (IsGlGreaterEqual (3, 0) || CheckExtension ("GL_ARB_framebuffer_object"))
2036 && FindProcShort (glIsRenderbuffer)
2037 && FindProcShort (glBindRenderbuffer)
2038 && FindProcShort (glDeleteRenderbuffers)
2039 && FindProcShort (glGenRenderbuffers)
2040 && FindProcShort (glRenderbufferStorage)
2041 && FindProcShort (glGetRenderbufferParameteriv)
2042 && FindProcShort (glIsFramebuffer)
2043 && FindProcShort (glBindFramebuffer)
2044 && FindProcShort (glDeleteFramebuffers)
2045 && FindProcShort (glGenFramebuffers)
2046 && FindProcShort (glCheckFramebufferStatus)
2047 && FindProcShort (glFramebufferTexture1D)
2048 && FindProcShort (glFramebufferTexture2D)
2049 && FindProcShort (glFramebufferTexture3D)
2050 && FindProcShort (glFramebufferRenderbuffer)
2051 && FindProcShort (glGetFramebufferAttachmentParameteriv)
2052 && FindProcShort (glGenerateMipmap)
2053 && FindProcShort (glBlitFramebuffer)
2054 && FindProcShort (glRenderbufferStorageMultisample)
2055 && FindProcShort (glFramebufferTextureLayer);
2057 // load GL_ARB_vertex_array_object (added to OpenGL 3.0 core)
2058 const bool hasVAO = (IsGlGreaterEqual (3, 0) || CheckExtension ("GL_ARB_vertex_array_object"))
2059 && FindProcShort (glBindVertexArray)
2060 && FindProcShort (glDeleteVertexArrays)
2061 && FindProcShort (glGenVertexArrays)
2062 && FindProcShort (glIsVertexArray);
2064 // load GL_ARB_map_buffer_range (added to OpenGL 3.0 core)
2065 const bool hasMapBufferRange = (IsGlGreaterEqual (3, 0) || CheckExtension ("GL_ARB_map_buffer_range"))
2066 && FindProcShort (glMapBufferRange)
2067 && FindProcShort (glFlushMappedBufferRange);
2069 // load OpenGL 3.0 new functions
2070 has30 = IsGlGreaterEqual (3, 0)
2073 && hasMapBufferRange
2074 && FindProcShort (glColorMaski)
2075 && FindProcShort (glGetBooleani_v)
2076 && FindProcShort (glGetIntegeri_v)
2077 && FindProcShort (glEnablei)
2078 && FindProcShort (glDisablei)
2079 && FindProcShort (glIsEnabledi)
2080 && FindProcShort (glBeginTransformFeedback)
2081 && FindProcShort (glEndTransformFeedback)
2082 && FindProcShort (glBindBufferRange)
2083 && FindProcShort (glBindBufferBase)
2084 && FindProcShort (glTransformFeedbackVaryings)
2085 && FindProcShort (glGetTransformFeedbackVarying)
2086 && FindProcShort (glClampColor)
2087 && FindProcShort (glBeginConditionalRender)
2088 && FindProcShort (glEndConditionalRender)
2089 && FindProcShort (glVertexAttribIPointer)
2090 && FindProcShort (glGetVertexAttribIiv)
2091 && FindProcShort (glGetVertexAttribIuiv)
2092 && FindProcShort (glVertexAttribI1i)
2093 && FindProcShort (glVertexAttribI2i)
2094 && FindProcShort (glVertexAttribI3i)
2095 && FindProcShort (glVertexAttribI4i)
2096 && FindProcShort (glVertexAttribI1ui)
2097 && FindProcShort (glVertexAttribI2ui)
2098 && FindProcShort (glVertexAttribI3ui)
2099 && FindProcShort (glVertexAttribI4ui)
2100 && FindProcShort (glVertexAttribI1iv)
2101 && FindProcShort (glVertexAttribI2iv)
2102 && FindProcShort (glVertexAttribI3iv)
2103 && FindProcShort (glVertexAttribI4iv)
2104 && FindProcShort (glVertexAttribI1uiv)
2105 && FindProcShort (glVertexAttribI2uiv)
2106 && FindProcShort (glVertexAttribI3uiv)
2107 && FindProcShort (glVertexAttribI4uiv)
2108 && FindProcShort (glVertexAttribI4bv)
2109 && FindProcShort (glVertexAttribI4sv)
2110 && FindProcShort (glVertexAttribI4ubv)
2111 && FindProcShort (glVertexAttribI4usv)
2112 && FindProcShort (glGetUniformuiv)
2113 && FindProcShort (glBindFragDataLocation)
2114 && FindProcShort (glGetFragDataLocation)
2115 && FindProcShort (glUniform1ui)
2116 && FindProcShort (glUniform2ui)
2117 && FindProcShort (glUniform3ui)
2118 && FindProcShort (glUniform4ui)
2119 && FindProcShort (glUniform1uiv)
2120 && FindProcShort (glUniform2uiv)
2121 && FindProcShort (glUniform3uiv)
2122 && FindProcShort (glUniform4uiv)
2123 && FindProcShort (glTexParameterIiv)
2124 && FindProcShort (glTexParameterIuiv)
2125 && FindProcShort (glGetTexParameterIiv)
2126 && FindProcShort (glGetTexParameterIuiv)
2127 && FindProcShort (glClearBufferiv)
2128 && FindProcShort (glClearBufferuiv)
2129 && FindProcShort (glClearBufferfv)
2130 && FindProcShort (glClearBufferfi)
2131 && FindProcShort (glGetStringi);
2134 checkWrongVersion (3, 0, aLastFailedProc);
2137 // load GL_ARB_uniform_buffer_object (added to OpenGL 3.1 core)
2138 const bool hasUBO = (IsGlGreaterEqual (3, 1) || CheckExtension ("GL_ARB_uniform_buffer_object"))
2139 && FindProcShort (glGetUniformIndices)
2140 && FindProcShort (glGetActiveUniformsiv)
2141 && FindProcShort (glGetActiveUniformName)
2142 && FindProcShort (glGetUniformBlockIndex)
2143 && FindProcShort (glGetActiveUniformBlockiv)
2144 && FindProcShort (glGetActiveUniformBlockName)
2145 && FindProcShort (glUniformBlockBinding);
2147 // load GL_ARB_copy_buffer (added to OpenGL 3.1 core)
2148 const bool hasCopyBufSubData = (IsGlGreaterEqual (3, 1) || CheckExtension ("GL_ARB_copy_buffer"))
2149 && FindProcShort (glCopyBufferSubData);
2153 // NPOT textures are required by OpenGL 2.0 specifications
2154 // but doesn't hardware accelerated by some ancient OpenGL 2.1 hardware (GeForce FX, RadeOn 9700 etc.)
2155 arbNPTW = Standard_True;
2156 arbTexRG = Standard_True;
2159 // load OpenGL 3.1 new functions
2160 has31 = IsGlGreaterEqual (3, 1)
2162 && hasCopyBufSubData
2163 && FindProcShort (glDrawArraysInstanced)
2164 && FindProcShort (glDrawElementsInstanced)
2165 && FindProcShort (glTexBuffer)
2166 && FindProcShort (glPrimitiveRestartIndex);
2169 arbTBO = (OpenGl_ArbTBO* )(&(*myFuncs));
2170 arbIns = (OpenGl_ArbIns* )(&(*myFuncs));
2174 checkWrongVersion (3, 1, aLastFailedProc);
2176 // initialize TBO extension (ARB)
2177 if (CheckExtension ("GL_ARB_texture_buffer_object")
2178 && FindProc ("glTexBufferARB", myFuncs->glTexBuffer))
2180 arbTBO = (OpenGl_ArbTBO* )(&(*myFuncs));
2183 // initialize hardware instancing extension (ARB)
2184 if (CheckExtension ("GL_ARB_draw_instanced")
2185 && FindProc ("glDrawArraysInstancedARB", myFuncs->glDrawArraysInstanced)
2186 && FindProc ("glDrawElementsInstancedARB", myFuncs->glDrawElementsInstanced))
2188 arbIns = (OpenGl_ArbIns* )(&(*myFuncs));
2192 arbTboRGB32 = CheckExtension ("GL_ARB_texture_buffer_object_rgb32");
2194 // load GL_ARB_draw_elements_base_vertex (added to OpenGL 3.2 core)
2195 const bool hasDrawElemsBaseVert = (IsGlGreaterEqual (3, 2) || CheckExtension ("GL_ARB_draw_elements_base_vertex"))
2196 && FindProcShort (glDrawElementsBaseVertex)
2197 && FindProcShort (glDrawRangeElementsBaseVertex)
2198 && FindProcShort (glDrawElementsInstancedBaseVertex)
2199 && FindProcShort (glMultiDrawElementsBaseVertex);
2201 // load GL_ARB_provoking_vertex (added to OpenGL 3.2 core)
2202 const bool hasProvokingVert = (IsGlGreaterEqual (3, 2) || CheckExtension ("GL_ARB_provoking_vertex"))
2203 && FindProcShort (glProvokingVertex);
2205 // load GL_ARB_sync (added to OpenGL 3.2 core)
2206 const bool hasSync = (IsGlGreaterEqual (3, 2) || CheckExtension ("GL_ARB_sync"))
2207 && FindProcShort (glFenceSync)
2208 && FindProcShort (glIsSync)
2209 && FindProcShort (glDeleteSync)
2210 && FindProcShort (glClientWaitSync)
2211 && FindProcShort (glWaitSync)
2212 && FindProcShort (glGetInteger64v)
2213 && FindProcShort (glGetSynciv);
2215 // load GL_ARB_texture_multisample (added to OpenGL 3.2 core)
2216 const bool hasTextureMultisample = (IsGlGreaterEqual (3, 2) || CheckExtension ("GL_ARB_texture_multisample"))
2217 && FindProcShort (glTexImage2DMultisample)
2218 && FindProcShort (glTexImage3DMultisample)
2219 && FindProcShort (glGetMultisamplefv)
2220 && FindProcShort (glSampleMaski);
2222 // load OpenGL 3.2 new functions
2223 has32 = IsGlGreaterEqual (3, 2)
2224 && hasDrawElemsBaseVert
2227 && hasTextureMultisample
2228 && FindProcShort (glGetInteger64i_v)
2229 && FindProcShort (glGetBufferParameteri64v)
2230 && FindProcShort (glFramebufferTexture);
2233 core32 = (OpenGl_GlCore32* )(&(*myFuncs));
2236 core32->glGenVertexArrays (1, &myDefaultVao);
2240 core32back = (OpenGl_GlCore32Back* )(&(*myFuncs));
2242 ::glGetIntegerv (GL_MAX_SAMPLES, &myMaxMsaaSamples);
2246 checkWrongVersion (3, 2, aLastFailedProc);
2249 // load GL_ARB_blend_func_extended (added to OpenGL 3.3 core)
2250 const bool hasBlendFuncExtended = (IsGlGreaterEqual (3, 3) || CheckExtension ("GL_ARB_blend_func_extended"))
2251 && FindProcShort (glBindFragDataLocationIndexed)
2252 && FindProcShort (glGetFragDataIndex);
2254 // load GL_ARB_sampler_objects (added to OpenGL 3.3 core)
2255 const bool hasSamplerObjects = (IsGlGreaterEqual (3, 3) || CheckExtension ("GL_ARB_sampler_objects"))
2256 && FindProcShort (glGenSamplers)
2257 && FindProcShort (glDeleteSamplers)
2258 && FindProcShort (glIsSampler)
2259 && FindProcShort (glBindSampler)
2260 && FindProcShort (glSamplerParameteri)
2261 && FindProcShort (glSamplerParameteriv)
2262 && FindProcShort (glSamplerParameterf)
2263 && FindProcShort (glSamplerParameterfv)
2264 && FindProcShort (glSamplerParameterIiv)
2265 && FindProcShort (glSamplerParameterIuiv)
2266 && FindProcShort (glGetSamplerParameteriv)
2267 && FindProcShort (glGetSamplerParameterIiv)
2268 && FindProcShort (glGetSamplerParameterfv)
2269 && FindProcShort (glGetSamplerParameterIuiv);
2270 if (hasSamplerObjects)
2272 arbSamplerObject = (OpenGl_ArbSamplerObject* )(&(*myFuncs));
2275 // load GL_ARB_timer_query (added to OpenGL 3.3 core)
2276 const bool hasTimerQuery = (IsGlGreaterEqual (3, 3) || CheckExtension ("GL_ARB_timer_query"))
2277 && FindProcShort (glQueryCounter)
2278 && FindProcShort (glGetQueryObjecti64v)
2279 && FindProcShort (glGetQueryObjectui64v);
2281 // load GL_ARB_vertex_type_2_10_10_10_rev (added to OpenGL 3.3 core)
2282 const bool hasVertType21010101rev = (IsGlGreaterEqual (3, 3) || CheckExtension ("GL_ARB_vertex_type_2_10_10_10_rev"))
2283 && FindProcShort (glVertexAttribP1ui)
2284 && FindProcShort (glVertexAttribP1uiv)
2285 && FindProcShort (glVertexAttribP2ui)
2286 && FindProcShort (glVertexAttribP2uiv)
2287 && FindProcShort (glVertexAttribP3ui)
2288 && FindProcShort (glVertexAttribP3uiv)
2289 && FindProcShort (glVertexAttribP4ui)
2290 && FindProcShort (glVertexAttribP4uiv);
2292 if ( hasVertType21010101rev
2295 // load deprecated functions
2296 const bool hasVertType21010101revExt =
2297 FindProcShort (glVertexP2ui)
2298 && FindProcShort (glVertexP2uiv)
2299 && FindProcShort (glVertexP3ui)
2300 && FindProcShort (glVertexP3uiv)
2301 && FindProcShort (glVertexP4ui)
2302 && FindProcShort (glVertexP4uiv)
2303 && FindProcShort (glTexCoordP1ui)
2304 && FindProcShort (glTexCoordP1uiv)
2305 && FindProcShort (glTexCoordP2ui)
2306 && FindProcShort (glTexCoordP2uiv)
2307 && FindProcShort (glTexCoordP3ui)
2308 && FindProcShort (glTexCoordP3uiv)
2309 && FindProcShort (glTexCoordP4ui)
2310 && FindProcShort (glTexCoordP4uiv)
2311 && FindProcShort (glMultiTexCoordP1ui)
2312 && FindProcShort (glMultiTexCoordP1uiv)
2313 && FindProcShort (glMultiTexCoordP2ui)
2314 && FindProcShort (glMultiTexCoordP2uiv)
2315 && FindProcShort (glMultiTexCoordP3ui)
2316 && FindProcShort (glMultiTexCoordP3uiv)
2317 && FindProcShort (glMultiTexCoordP4ui)
2318 && FindProcShort (glMultiTexCoordP4uiv)
2319 && FindProcShort (glNormalP3ui)
2320 && FindProcShort (glNormalP3uiv)
2321 && FindProcShort (glColorP3ui)
2322 && FindProcShort (glColorP3uiv)
2323 && FindProcShort (glColorP4ui)
2324 && FindProcShort (glColorP4uiv)
2325 && FindProcShort (glSecondaryColorP3ui)
2326 && FindProcShort (glSecondaryColorP3uiv);
2327 (void )hasVertType21010101revExt;
2330 // load OpenGL 3.3 extra functions
2331 has33 = IsGlGreaterEqual (3, 3)
2332 && hasBlendFuncExtended
2333 && hasSamplerObjects
2335 && hasVertType21010101rev
2336 && FindProcShort (glVertexAttribDivisor);
2339 core33 = (OpenGl_GlCore33* )(&(*myFuncs));
2342 core33back = (OpenGl_GlCore33Back* )(&(*myFuncs));
2347 checkWrongVersion (3, 3, aLastFailedProc);
2350 // load GL_ARB_draw_indirect (added to OpenGL 4.0 core)
2351 const bool hasDrawIndirect = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_draw_indirect"))
2352 && FindProcShort (glDrawArraysIndirect)
2353 && FindProcShort (glDrawElementsIndirect);
2355 // load GL_ARB_gpu_shader_fp64 (added to OpenGL 4.0 core)
2356 const bool hasShaderFP64 = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_gpu_shader_fp64"))
2357 && FindProcShort (glUniform1d)
2358 && FindProcShort (glUniform2d)
2359 && FindProcShort (glUniform3d)
2360 && FindProcShort (glUniform4d)
2361 && FindProcShort (glUniform1dv)
2362 && FindProcShort (glUniform2dv)
2363 && FindProcShort (glUniform3dv)
2364 && FindProcShort (glUniform4dv)
2365 && FindProcShort (glUniformMatrix2dv)
2366 && FindProcShort (glUniformMatrix3dv)
2367 && FindProcShort (glUniformMatrix4dv)
2368 && FindProcShort (glUniformMatrix2x3dv)
2369 && FindProcShort (glUniformMatrix2x4dv)
2370 && FindProcShort (glUniformMatrix3x2dv)
2371 && FindProcShort (glUniformMatrix3x4dv)
2372 && FindProcShort (glUniformMatrix4x2dv)
2373 && FindProcShort (glUniformMatrix4x3dv)
2374 && FindProcShort (glGetUniformdv);
2376 // load GL_ARB_shader_subroutine (added to OpenGL 4.0 core)
2377 const bool hasShaderSubroutine = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_shader_subroutine"))
2378 && FindProcShort (glGetSubroutineUniformLocation)
2379 && FindProcShort (glGetSubroutineIndex)
2380 && FindProcShort (glGetActiveSubroutineUniformiv)
2381 && FindProcShort (glGetActiveSubroutineUniformName)
2382 && FindProcShort (glGetActiveSubroutineName)
2383 && FindProcShort (glUniformSubroutinesuiv)
2384 && FindProcShort (glGetUniformSubroutineuiv)
2385 && FindProcShort (glGetProgramStageiv);
2387 // load GL_ARB_tessellation_shader (added to OpenGL 4.0 core)
2388 const bool hasTessellationShader = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_tessellation_shader"))
2389 && FindProcShort (glPatchParameteri)
2390 && FindProcShort (glPatchParameterfv);
2392 // load GL_ARB_transform_feedback2 (added to OpenGL 4.0 core)
2393 const bool hasTrsfFeedback2 = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_transform_feedback2"))
2394 && FindProcShort (glBindTransformFeedback)
2395 && FindProcShort (glDeleteTransformFeedbacks)
2396 && FindProcShort (glGenTransformFeedbacks)
2397 && FindProcShort (glIsTransformFeedback)
2398 && FindProcShort (glPauseTransformFeedback)
2399 && FindProcShort (glResumeTransformFeedback)
2400 && FindProcShort (glDrawTransformFeedback);
2402 // load GL_ARB_transform_feedback3 (added to OpenGL 4.0 core)
2403 const bool hasTrsfFeedback3 = (IsGlGreaterEqual (4, 0) || CheckExtension ("GL_ARB_transform_feedback3"))
2404 && FindProcShort (glDrawTransformFeedbackStream)
2405 && FindProcShort (glBeginQueryIndexed)
2406 && FindProcShort (glEndQueryIndexed)
2407 && FindProcShort (glGetQueryIndexediv);
2409 // load OpenGL 4.0 new functions
2410 has40 = IsGlGreaterEqual (4, 0)
2413 && hasShaderSubroutine
2414 && hasTessellationShader
2417 && FindProcShort (glMinSampleShading)
2418 && FindProcShort (glBlendEquationi)
2419 && FindProcShort (glBlendEquationSeparatei)
2420 && FindProcShort (glBlendFunci)
2421 && FindProcShort (glBlendFuncSeparatei);
2424 arbTboRGB32 = Standard_True; // in core since OpenGL 4.0
2428 checkWrongVersion (4, 0, aLastFailedProc);
2431 // load GL_ARB_ES2_compatibility (added to OpenGL 4.1 core)
2432 const bool hasES2Compatibility = (IsGlGreaterEqual (4, 1) || CheckExtension ("GL_ARB_ES2_compatibility"))
2433 && FindProcShort (glReleaseShaderCompiler)
2434 && FindProcShort (glShaderBinary)
2435 && FindProcShort (glGetShaderPrecisionFormat)
2436 && FindProcShort (glDepthRangef)
2437 && FindProcShort (glClearDepthf);
2439 // load GL_ARB_get_program_binary (added to OpenGL 4.1 core)
2440 const bool hasGetProgramBinary = (IsGlGreaterEqual (4, 1) || CheckExtension ("GL_ARB_get_program_binary"))
2441 && FindProcShort (glGetProgramBinary)
2442 && FindProcShort (glProgramBinary)
2443 && FindProcShort (glProgramParameteri);
2446 // load GL_ARB_separate_shader_objects (added to OpenGL 4.1 core)
2447 const bool hasSeparateShaderObjects = (IsGlGreaterEqual (4, 1) || CheckExtension ("GL_ARB_separate_shader_objects"))
2448 && FindProcShort (glUseProgramStages)
2449 && FindProcShort (glActiveShaderProgram)
2450 && FindProcShort (glCreateShaderProgramv)
2451 && FindProcShort (glBindProgramPipeline)
2452 && FindProcShort (glDeleteProgramPipelines)
2453 && FindProcShort (glGenProgramPipelines)
2454 && FindProcShort (glIsProgramPipeline)
2455 && FindProcShort (glGetProgramPipelineiv)
2456 && FindProcShort (glProgramUniform1i)
2457 && FindProcShort (glProgramUniform1iv)
2458 && FindProcShort (glProgramUniform1f)
2459 && FindProcShort (glProgramUniform1fv)
2460 && FindProcShort (glProgramUniform1d)
2461 && FindProcShort (glProgramUniform1dv)
2462 && FindProcShort (glProgramUniform1ui)
2463 && FindProcShort (glProgramUniform1uiv)
2464 && FindProcShort (glProgramUniform2i)
2465 && FindProcShort (glProgramUniform2iv)
2466 && FindProcShort (glProgramUniform2f)
2467 && FindProcShort (glProgramUniform2fv)
2468 && FindProcShort (glProgramUniform2d)
2469 && FindProcShort (glProgramUniform2dv)
2470 && FindProcShort (glProgramUniform2ui)
2471 && FindProcShort (glProgramUniform2uiv)
2472 && FindProcShort (glProgramUniform3i)
2473 && FindProcShort (glProgramUniform3iv)
2474 && FindProcShort (glProgramUniform3f)
2475 && FindProcShort (glProgramUniform3fv)
2476 && FindProcShort (glProgramUniform3d)
2477 && FindProcShort (glProgramUniform3dv)
2478 && FindProcShort (glProgramUniform3ui)
2479 && FindProcShort (glProgramUniform3uiv)
2480 && FindProcShort (glProgramUniform4i)
2481 && FindProcShort (glProgramUniform4iv)
2482 && FindProcShort (glProgramUniform4f)
2483 && FindProcShort (glProgramUniform4fv)
2484 && FindProcShort (glProgramUniform4d)
2485 && FindProcShort (glProgramUniform4dv)
2486 && FindProcShort (glProgramUniform4ui)
2487 && FindProcShort (glProgramUniform4uiv)
2488 && FindProcShort (glProgramUniformMatrix2fv)
2489 && FindProcShort (glProgramUniformMatrix3fv)
2490 && FindProcShort (glProgramUniformMatrix4fv)
2491 && FindProcShort (glProgramUniformMatrix2dv)
2492 && FindProcShort (glProgramUniformMatrix3dv)
2493 && FindProcShort (glProgramUniformMatrix4dv)
2494 && FindProcShort (glProgramUniformMatrix2x3fv)
2495 && FindProcShort (glProgramUniformMatrix3x2fv)
2496 && FindProcShort (glProgramUniformMatrix2x4fv)
2497 && FindProcShort (glProgramUniformMatrix4x2fv)
2498 && FindProcShort (glProgramUniformMatrix3x4fv)
2499 && FindProcShort (glProgramUniformMatrix4x3fv)
2500 && FindProcShort (glProgramUniformMatrix2x3dv)
2501 && FindProcShort (glProgramUniformMatrix3x2dv)
2502 && FindProcShort (glProgramUniformMatrix2x4dv)
2503 && FindProcShort (glProgramUniformMatrix4x2dv)
2504 && FindProcShort (glProgramUniformMatrix3x4dv)
2505 && FindProcShort (glProgramUniformMatrix4x3dv)
2506 && FindProcShort (glValidateProgramPipeline)
2507 && FindProcShort (glGetProgramPipelineInfoLog);
2509 // load GL_ARB_vertex_attrib_64bit (added to OpenGL 4.1 core)
2510 const bool hasVertAttrib64bit = (IsGlGreaterEqual (4, 1) || CheckExtension ("GL_ARB_vertex_attrib_64bit"))
2511 && FindProcShort (glVertexAttribL1d)
2512 && FindProcShort (glVertexAttribL2d)
2513 && FindProcShort (glVertexAttribL3d)
2514 && FindProcShort (glVertexAttribL4d)
2515 && FindProcShort (glVertexAttribL1dv)
2516 && FindProcShort (glVertexAttribL2dv)
2517 && FindProcShort (glVertexAttribL3dv)
2518 && FindProcShort (glVertexAttribL4dv)
2519 && FindProcShort (glVertexAttribLPointer)
2520 && FindProcShort (glGetVertexAttribLdv);
2522 // load GL_ARB_viewport_array (added to OpenGL 4.1 core)
2523 const bool hasViewportArray = (IsGlGreaterEqual (4, 1) || CheckExtension ("GL_ARB_viewport_array"))
2524 && FindProcShort (glViewportArrayv)
2525 && FindProcShort (glViewportIndexedf)
2526 && FindProcShort (glViewportIndexedfv)
2527 && FindProcShort (glScissorArrayv)
2528 && FindProcShort (glScissorIndexed)
2529 && FindProcShort (glScissorIndexedv)
2530 && FindProcShort (glDepthRangeArrayv)
2531 && FindProcShort (glDepthRangeIndexed)
2532 && FindProcShort (glGetFloati_v)
2533 && FindProcShort (glGetDoublei_v);
2535 has41 = IsGlGreaterEqual (4, 1)
2536 && hasES2Compatibility
2537 && hasGetProgramBinary
2538 && hasSeparateShaderObjects
2539 && hasVertAttrib64bit
2540 && hasViewportArray;
2543 core41 = (OpenGl_GlCore41* )(&(*myFuncs));
2546 core41back = (OpenGl_GlCore41Back* )(&(*myFuncs));
2551 checkWrongVersion (4, 1, aLastFailedProc);
2554 // load GL_ARB_base_instance (added to OpenGL 4.2 core)
2555 const bool hasBaseInstance = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_base_instance"))
2556 && FindProcShort (glDrawArraysInstancedBaseInstance)
2557 && FindProcShort (glDrawElementsInstancedBaseInstance)
2558 && FindProcShort (glDrawElementsInstancedBaseVertexBaseInstance);
2560 // load GL_ARB_transform_feedback_instanced (added to OpenGL 4.2 core)
2561 const bool hasTrsfFeedbackInstanced = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_transform_feedback_instanced"))
2562 && FindProcShort (glDrawTransformFeedbackInstanced)
2563 && FindProcShort (glDrawTransformFeedbackStreamInstanced);
2565 // load GL_ARB_internalformat_query (added to OpenGL 4.2 core)
2566 const bool hasInternalFormatQuery = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_internalformat_query"))
2567 && FindProcShort (glGetInternalformativ);
2569 // load GL_ARB_shader_atomic_counters (added to OpenGL 4.2 core)
2570 const bool hasShaderAtomicCounters = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_shader_atomic_counters"))
2571 && FindProcShort (glGetActiveAtomicCounterBufferiv);
2573 // load GL_ARB_shader_image_load_store (added to OpenGL 4.2 core)
2574 const bool hasShaderImgLoadStore = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_shader_image_load_store"))
2575 && FindProcShort (glBindImageTexture)
2576 && FindProcShort (glMemoryBarrier);
2578 // load GL_ARB_texture_storage (added to OpenGL 4.2 core)
2579 const bool hasTextureStorage = (IsGlGreaterEqual (4, 2) || CheckExtension ("GL_ARB_texture_storage"))
2580 && FindProcShort (glTexStorage1D)
2581 && FindProcShort (glTexStorage2D)
2582 && FindProcShort (glTexStorage3D);
2584 has42 = IsGlGreaterEqual (4, 2)
2586 && hasTrsfFeedbackInstanced
2587 && hasInternalFormatQuery
2588 && hasShaderAtomicCounters
2589 && hasShaderImgLoadStore
2590 && hasTextureStorage;
2593 core42 = (OpenGl_GlCore42* )(&(*myFuncs));
2596 core42back = (OpenGl_GlCore42Back* )(&(*myFuncs));
2601 checkWrongVersion (4, 2, aLastFailedProc);
2604 has43 = IsGlGreaterEqual (4, 3)
2605 && FindProcShort (glClearBufferData)
2606 && FindProcShort (glClearBufferSubData)
2607 && FindProcShort (glDispatchCompute)
2608 && FindProcShort (glDispatchComputeIndirect)
2609 && FindProcShort (glCopyImageSubData)
2610 && FindProcShort (glFramebufferParameteri)
2611 && FindProcShort (glGetFramebufferParameteriv)
2612 && FindProcShort (glGetInternalformati64v)
2613 && FindProcShort (glInvalidateTexSubImage)
2614 && FindProcShort (glInvalidateTexImage)
2615 && FindProcShort (glInvalidateBufferSubData)
2616 && FindProcShort (glInvalidateBufferData)
2617 && FindProcShort (glInvalidateFramebuffer)
2618 && FindProcShort (glInvalidateSubFramebuffer)
2619 && FindProcShort (glMultiDrawArraysIndirect)
2620 && FindProcShort (glMultiDrawElementsIndirect)
2621 && FindProcShort (glGetProgramInterfaceiv)
2622 && FindProcShort (glGetProgramResourceIndex)
2623 && FindProcShort (glGetProgramResourceName)
2624 && FindProcShort (glGetProgramResourceiv)
2625 && FindProcShort (glGetProgramResourceLocation)
2626 && FindProcShort (glGetProgramResourceLocationIndex)
2627 && FindProcShort (glShaderStorageBlockBinding)
2628 && FindProcShort (glTexBufferRange)
2629 && FindProcShort (glTexStorage2DMultisample)
2630 && FindProcShort (glTexStorage3DMultisample)
2631 && FindProcShort (glTextureView)
2632 && FindProcShort (glBindVertexBuffer)
2633 && FindProcShort (glVertexAttribFormat)
2634 && FindProcShort (glVertexAttribIFormat)
2635 && FindProcShort (glVertexAttribLFormat)
2636 && FindProcShort (glVertexAttribBinding)
2637 && FindProcShort (glVertexBindingDivisor)
2638 && FindProcShort (glDebugMessageControl)
2639 && FindProcShort (glDebugMessageInsert)
2640 && FindProcShort (glDebugMessageCallback)
2641 && FindProcShort (glGetDebugMessageLog)
2642 && FindProcShort (glPushDebugGroup)
2643 && FindProcShort (glPopDebugGroup)
2644 && FindProcShort (glObjectLabel)
2645 && FindProcShort (glGetObjectLabel)
2646 && FindProcShort (glObjectPtrLabel)
2647 && FindProcShort (glGetObjectPtrLabel);
2650 core43 = (OpenGl_GlCore43* )(&(*myFuncs));
2653 core43back = (OpenGl_GlCore43Back* )(&(*myFuncs));
2658 checkWrongVersion (4, 3, aLastFailedProc);
2661 // load GL_ARB_clear_texture (added to OpenGL 4.4 core)
2662 bool arbTexClear = (IsGlGreaterEqual (4, 4) || CheckExtension ("GL_ARB_clear_texture"))
2663 && FindProcShort (glClearTexImage)
2664 && FindProcShort (glClearTexSubImage);
2666 has44 = IsGlGreaterEqual (4, 4)
2668 && FindProcShort (glBufferStorage)
2669 && FindProcShort (glBindBuffersBase)
2670 && FindProcShort (glBindBuffersRange)
2671 && FindProcShort (glBindTextures)
2672 && FindProcShort (glBindSamplers)
2673 && FindProcShort (glBindImageTextures)
2674 && FindProcShort (glBindVertexBuffers);
2677 core44 = (OpenGl_GlCore44* )(&(*myFuncs));
2680 core44back = (OpenGl_GlCore44Back* )(&(*myFuncs));
2685 checkWrongVersion (4, 4, aLastFailedProc);
2688 has45 = IsGlGreaterEqual (4, 5)
2689 && FindProcShort (glBindVertexBuffers)
2690 && FindProcShort (glClipControl)
2691 && FindProcShort (glCreateTransformFeedbacks)
2692 && FindProcShort (glTransformFeedbackBufferBase)
2693 && FindProcShort (glTransformFeedbackBufferRange)
2694 && FindProcShort (glGetTransformFeedbackiv)
2695 && FindProcShort (glGetTransformFeedbacki_v)
2696 && FindProcShort (glGetTransformFeedbacki64_v)
2697 && FindProcShort (glCreateBuffers)
2698 && FindProcShort (glNamedBufferStorage)
2699 && FindProcShort (glNamedBufferData)
2700 && FindProcShort (glNamedBufferSubData)
2701 && FindProcShort (glCopyNamedBufferSubData)
2702 && FindProcShort (glClearNamedBufferData)
2703 && FindProcShort (glClearNamedBufferSubData)
2704 && FindProcShort (glMapNamedBuffer)
2705 && FindProcShort (glMapNamedBufferRange)
2706 && FindProcShort (glUnmapNamedBuffer)
2707 && FindProcShort (glFlushMappedNamedBufferRange)
2708 && FindProcShort (glGetNamedBufferParameteriv)
2709 && FindProcShort (glGetNamedBufferParameteri64v)
2710 && FindProcShort (glGetNamedBufferPointerv)
2711 && FindProcShort (glGetNamedBufferSubData)
2712 && FindProcShort (glCreateFramebuffers)
2713 && FindProcShort (glNamedFramebufferRenderbuffer)
2714 && FindProcShort (glNamedFramebufferParameteri)
2715 && FindProcShort (glNamedFramebufferTexture)
2716 && FindProcShort (glNamedFramebufferTextureLayer)
2717 && FindProcShort (glNamedFramebufferDrawBuffer)
2718 && FindProcShort (glNamedFramebufferDrawBuffers)
2719 && FindProcShort (glNamedFramebufferReadBuffer)
2720 && FindProcShort (glInvalidateNamedFramebufferData)
2721 && FindProcShort (glInvalidateNamedFramebufferSubData)
2722 && FindProcShort (glClearNamedFramebufferiv)
2723 && FindProcShort (glClearNamedFramebufferuiv)
2724 && FindProcShort (glClearNamedFramebufferfv)
2725 && FindProcShort (glClearNamedFramebufferfi)
2726 && FindProcShort (glBlitNamedFramebuffer)
2727 && FindProcShort (glCheckNamedFramebufferStatus)
2728 && FindProcShort (glGetNamedFramebufferParameteriv)
2729 && FindProcShort (glGetNamedFramebufferAttachmentParameteriv)
2730 && FindProcShort (glCreateRenderbuffers)
2731 && FindProcShort (glNamedRenderbufferStorage)
2732 && FindProcShort (glNamedRenderbufferStorageMultisample)
2733 && FindProcShort (glGetNamedRenderbufferParameteriv)
2734 && FindProcShort (glCreateTextures)
2735 && FindProcShort (glTextureBuffer)
2736 && FindProcShort (glTextureBufferRange)
2737 && FindProcShort (glTextureStorage1D)
2738 && FindProcShort (glTextureStorage2D)
2739 && FindProcShort (glTextureStorage3D)
2740 && FindProcShort (glTextureStorage2DMultisample)
2741 && FindProcShort (glTextureStorage3DMultisample)
2742 && FindProcShort (glTextureSubImage1D)
2743 && FindProcShort (glTextureSubImage2D)
2744 && FindProcShort (glTextureSubImage3D)
2745 && FindProcShort (glCompressedTextureSubImage1D)
2746 && FindProcShort (glCompressedTextureSubImage2D)
2747 && FindProcShort (glCompressedTextureSubImage3D)
2748 && FindProcShort (glCopyTextureSubImage1D)
2749 && FindProcShort (glCopyTextureSubImage2D)
2750 && FindProcShort (glCopyTextureSubImage3D)
2751 && FindProcShort (glTextureParameterf)
2752 && FindProcShort (glTextureParameterfv)
2753 && FindProcShort (glTextureParameteri)
2754 && FindProcShort (glTextureParameterIiv)
2755 && FindProcShort (glTextureParameterIuiv)
2756 && FindProcShort (glTextureParameteriv)
2757 && FindProcShort (glGenerateTextureMipmap)
2758 && FindProcShort (glBindTextureUnit)
2759 && FindProcShort (glGetTextureImage)
2760 && FindProcShort (glGetCompressedTextureImage)
2761 && FindProcShort (glGetTextureLevelParameterfv)
2762 && FindProcShort (glGetTextureLevelParameteriv)
2763 && FindProcShort (glGetTextureParameterfv)
2764 && FindProcShort (glGetTextureParameterIiv)
2765 && FindProcShort (glGetTextureParameterIuiv)
2766 && FindProcShort (glGetTextureParameteriv)
2767 && FindProcShort (glCreateVertexArrays)
2768 && FindProcShort (glDisableVertexArrayAttrib)
2769 && FindProcShort (glEnableVertexArrayAttrib)
2770 && FindProcShort (glVertexArrayElementBuffer)
2771 && FindProcShort (glVertexArrayVertexBuffer)
2772 && FindProcShort (glVertexArrayVertexBuffers)
2773 && FindProcShort (glVertexArrayAttribBinding)
2774 && FindProcShort (glVertexArrayAttribFormat)
2775 && FindProcShort (glVertexArrayAttribIFormat)
2776 && FindProcShort (glVertexArrayAttribLFormat)
2777 && FindProcShort (glVertexArrayBindingDivisor)
2778 && FindProcShort (glGetVertexArrayiv)
2779 && FindProcShort (glGetVertexArrayIndexediv)
2780 && FindProcShort (glGetVertexArrayIndexed64iv)
2781 && FindProcShort (glCreateSamplers)
2782 && FindProcShort (glCreateProgramPipelines)
2783 && FindProcShort (glCreateQueries)
2784 && FindProcShort (glGetQueryBufferObjecti64v)
2785 && FindProcShort (glGetQueryBufferObjectiv)
2786 && FindProcShort (glGetQueryBufferObjectui64v)
2787 && FindProcShort (glGetQueryBufferObjectuiv)
2788 && FindProcShort (glMemoryBarrierByRegion)
2789 && FindProcShort (glGetTextureSubImage)
2790 && FindProcShort (glGetCompressedTextureSubImage)
2791 && FindProcShort (glGetGraphicsResetStatus)
2792 && FindProcShort (glGetnCompressedTexImage)
2793 && FindProcShort (glGetnTexImage)
2794 && FindProcShort (glGetnUniformdv)
2795 && FindProcShort (glGetnUniformfv)
2796 && FindProcShort (glGetnUniformiv)
2797 && FindProcShort (glGetnUniformuiv)
2798 && FindProcShort (glReadnPixels)
2799 && FindProcShort (glGetnMapdv)
2800 && FindProcShort (glGetnMapfv)
2801 && FindProcShort (glGetnMapiv)
2802 && FindProcShort (glGetnPixelMapfv)
2803 && FindProcShort (glGetnPixelMapuiv)
2804 && FindProcShort (glGetnPixelMapusv)
2805 && FindProcShort (glGetnPolygonStipple)
2806 && FindProcShort (glGetnColorTable)
2807 && FindProcShort (glGetnConvolutionFilter)
2808 && FindProcShort (glGetnSeparableFilter)
2809 && FindProcShort (glGetnHistogram)
2810 && FindProcShort (glGetnMinmax)
2811 && FindProcShort (glTextureBarrier);
2814 core45 = (OpenGl_GlCore45* )(&(*myFuncs));
2817 core45back = (OpenGl_GlCore45Back* )(&(*myFuncs));
2822 checkWrongVersion (4, 5, aLastFailedProc);
2825 // initialize debug context extension
2826 if (CheckExtension ("GL_ARB_debug_output"))
2831 arbDbg = (OpenGl_ArbDbg* )(&(*myFuncs));
2833 else if (FindProc ("glDebugMessageControlARB", myFuncs->glDebugMessageControl)
2834 && FindProc ("glDebugMessageInsertARB", myFuncs->glDebugMessageInsert)
2835 && FindProc ("glDebugMessageCallbackARB", myFuncs->glDebugMessageCallback)
2836 && FindProc ("glGetDebugMessageLogARB", myFuncs->glGetDebugMessageLog))
2838 arbDbg = (OpenGl_ArbDbg* )(&(*myFuncs));
2842 && caps->contextDebug)
2844 // setup default callback
2845 myIsGlDebugCtx = Standard_True;
2846 arbDbg->glDebugMessageCallback (debugCallbackWrap, this);
2849 ::glEnable (GL_DEBUG_OUTPUT);
2851 if (caps->contextSyncDebug)
2853 ::glEnable (GL_DEBUG_OUTPUT_SYNCHRONOUS);
2858 // initialize FBO extension (ARB)
2861 arbFBO = (OpenGl_ArbFBO* )(&(*myFuncs));
2862 arbFBOBlit = (OpenGl_ArbFBOBlit* )(&(*myFuncs));
2863 extPDS = Standard_True; // extension for EXT, but part of ARB
2866 // initialize GS extension (EXT)
2867 if (CheckExtension ("GL_EXT_geometry_shader4")
2868 && FindProcShort (glProgramParameteriEXT))
2870 extGS = (OpenGl_ExtGS* )(&(*myFuncs));
2873 // initialize bindless texture extension (ARB)
2874 if (CheckExtension ("GL_ARB_bindless_texture")
2875 && FindProcShort (glGetTextureHandleARB)
2876 && FindProcShort (glGetTextureSamplerHandleARB)
2877 && FindProcShort (glMakeTextureHandleResidentARB)
2878 && FindProcShort (glMakeTextureHandleNonResidentARB)
2879 && FindProcShort (glGetImageHandleARB)
2880 && FindProcShort (glMakeImageHandleResidentARB)
2881 && FindProcShort (glMakeImageHandleNonResidentARB)
2882 && FindProcShort (glUniformHandleui64ARB)
2883 && FindProcShort (glUniformHandleui64vARB)
2884 && FindProcShort (glProgramUniformHandleui64ARB)
2885 && FindProcShort (glProgramUniformHandleui64vARB)
2886 && FindProcShort (glIsTextureHandleResidentARB)
2887 && FindProcShort (glIsImageHandleResidentARB)
2888 && FindProcShort (glVertexAttribL1ui64ARB)
2889 && FindProcShort (glVertexAttribL1ui64vARB)
2890 && FindProcShort (glGetVertexAttribLui64vARB))
2892 arbTexBindless = (OpenGl_ArbTexBindless* )(&(*myFuncs));
2897 // MSAA RenderBuffers have been defined in OpenGL 3.0,
2898 // but MSAA Textures - only in OpenGL 3.2+
2900 && CheckExtension ("GL_ARB_texture_multisample")
2901 && FindProcShort (glTexImage2DMultisample))
2903 GLint aNbColorSamples = 0, aNbDepthSamples = 0;
2904 ::glGetIntegerv (GL_MAX_COLOR_TEXTURE_SAMPLES, &aNbColorSamples);
2905 ::glGetIntegerv (GL_MAX_DEPTH_TEXTURE_SAMPLES, &aNbDepthSamples);
2906 myMaxMsaaSamples = Min (aNbColorSamples, aNbDepthSamples);
2909 && CheckExtension ("GL_ARB_texture_storage_multisample")
2910 && FindProcShort (glTexStorage2DMultisample))
2916 // check whether ray tracing mode is supported
2917 myHasRayTracing = has31
2919 && arbFBOBlit != NULL;
2921 // check whether textures in ray tracing mode are supported
2922 myHasRayTracingTextures = myHasRayTracing
2923 && arbTexBindless != NULL;
2925 // check whether adaptive screen sampling in ray tracing mode is supported
2926 myHasRayTracingAdaptiveSampling = myHasRayTracing
2928 myHasRayTracingAdaptiveSamplingAtomic = myHasRayTracingAdaptiveSampling
2929 && CheckExtension ("GL_NV_shader_atomic_float");
2935 // Detect if window buffer is considered by OpenGL as sRGB-ready
2936 // (linear RGB color written by shader is automatically converted into sRGB)
2937 // or not (offscreen FBO should be blit into window buffer with gamma correction).
2938 const GLenum aDefWinBuffer =
2939 #if !defined(GL_ES_VERSION_2_0)
2944 GLint aWinColorEncoding = 0; // GL_LINEAR
2945 arbFBO->glGetFramebufferAttachmentParameteriv (GL_FRAMEBUFFER, aDefWinBuffer, GL_FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING, &aWinColorEncoding);
2947 myIsSRgbWindow = aWinColorEncoding == GL_SRGB;
2949 // On desktop OpenGL, pixel formats are almost always sRGB-ready, even when not requested;
2950 // it is safe behavior on desktop where GL_FRAMEBUFFER_SRGB is disabled by default
2951 // (contrary to OpenGL ES, where it is enabled by default).
2952 // NVIDIA drivers, however, always return GL_LINEAR even for sRGB-ready pixel formats on Windows platform,
2953 // while AMD and Intel report GL_SRGB as expected.
2954 // macOS drivers seems to be also report GL_LINEAR even for [NSColorSpace sRGBColorSpace].
2955 #if !defined(GL_ES_VERSION_2_0)
2957 myIsSRgbWindow = true;
2960 && myVendor.Search ("nvidia") != -1)
2962 myIsSRgbWindow = true;
2966 if (!myIsSRgbWindow)
2968 Message::DefaultMessenger()->Send ("OpenGl_Context, warning: window buffer is not sRGB-ready.\n"
2969 "Check OpenGL window creation parameters for optimal performance.", Message_Trace);
2973 // check whether PBR shading model is supported
2974 myHasPBR = arbFBO != NULL
2975 && myMaxTexCombined >= 4
2978 && (IsGlGreaterEqual (3, 0)
2979 #if !defined(GL_ES_VERSION_2_0)
2980 || (IsGlGreaterEqual (2, 1) && CheckExtension ("GL_EXT_gpu_shader4"))
2985 myPBREnvLUTTexUnit = static_cast<Graphic3d_TextureUnit>(myMaxTexCombined + Graphic3d_TextureUnit_PbrEnvironmentLUT);
2986 myPBRDiffIBLMapSHTexUnit = static_cast<Graphic3d_TextureUnit>(myMaxTexCombined + Graphic3d_TextureUnit_PbrIblDiffuseSH);
2987 myPBRSpecIBLMapTexUnit = static_cast<Graphic3d_TextureUnit>(myMaxTexCombined + Graphic3d_TextureUnit_PbrIblSpecular);
2991 // =======================================================================
2992 // function : MemoryInfo
2994 // =======================================================================
2995 Standard_Size OpenGl_Context::AvailableMemory() const
2997 #if !defined(GL_ES_VERSION_2_0)
3000 // this is actually information for VBO pool
3001 // however because pools are mostly shared
3002 // it can be used for total GPU memory estimations
3005 glGetIntegerv (GL_VBO_FREE_MEMORY_ATI, aMemInfo);
3006 // returned value is in KiB, however this maybe changed in future
3007 return Standard_Size(aMemInfo[0]) * 1024;
3011 // current available dedicated video memory (in KiB), currently unused GPU memory
3013 glGetIntegerv (GL_GPU_MEMORY_INFO_CURRENT_AVAILABLE_VIDMEM_NVX, &aMemInfo);
3014 return Standard_Size(aMemInfo) * 1024;
3020 // =======================================================================
3021 // function : MemoryInfo
3023 // =======================================================================
3024 TCollection_AsciiString OpenGl_Context::MemoryInfo() const
3026 TColStd_IndexedDataMapOfStringString aDict;
3029 TCollection_AsciiString aText;
3030 for (TColStd_IndexedDataMapOfStringString::Iterator anIter (aDict); anIter.More(); anIter.Next())
3032 if (!aText.IsEmpty())
3036 aText += TCollection_AsciiString(" ") + anIter.Key() + ": " + anIter.Value();
3041 // =======================================================================
3042 // function : MemoryInfo
3044 // =======================================================================
3045 void OpenGl_Context::MemoryInfo (TColStd_IndexedDataMapOfStringString& theDict) const
3047 #if defined(GL_ES_VERSION_2_0)
3049 #elif defined(__APPLE__) && !defined(MACOSX_USE_GLX)
3050 GLint aGlRendId = 0;
3051 CGLGetParameter (CGLGetCurrentContext(), kCGLCPCurrentRendererID, &aGlRendId);
3053 CGLRendererInfoObj aRendObj = NULL;
3054 CGOpenGLDisplayMask aDispMask = CGDisplayIDToOpenGLDisplayMask (kCGDirectMainDisplay);
3056 CGLQueryRendererInfo (aDispMask, &aRendObj, &aRendNb);
3057 for (GLint aRendIter = 0; aRendIter < aRendNb; ++aRendIter)
3060 if (CGLDescribeRenderer (aRendObj, aRendIter, kCGLRPRendererID, &aRendId) != kCGLNoError
3061 || aRendId != aGlRendId)
3066 //kCGLRPVideoMemoryMegabytes = 131;
3067 //kCGLRPTextureMemoryMegabytes = 132;
3069 #if MAC_OS_X_VERSION_MIN_REQUIRED >= 1070
3070 if (CGLDescribeRenderer(aRendObj, aRendIter, kCGLRPVideoMemoryMegabytes, &aVMem) == kCGLNoError)
3072 addInfo (theDict, "GPU memory", TCollection_AsciiString() + aVMem + " MiB");
3074 if (CGLDescribeRenderer(aRendObj, aRendIter, kCGLRPTextureMemoryMegabytes, &aVMem) == kCGLNoError)
3076 addInfo (theDict, "GPU Texture memory", TCollection_AsciiString() + aVMem + " MiB");
3079 if (CGLDescribeRenderer(aRendObj, aRendIter, kCGLRPVideoMemory, &aVMem) == kCGLNoError)
3081 addInfo (theDict, "GPU memory", TCollection_AsciiString() + (aVMem / (1024 * 1024)) + " MiB");
3083 if (CGLDescribeRenderer(aRendObj, aRendIter, kCGLRPTextureMemory, &aVMem) == kCGLNoError)
3085 addInfo (theDict, "GPU Texture memory", TCollection_AsciiString() + (aVMem / (1024 * 1024)) + " MiB");
3091 #if !defined(GL_ES_VERSION_2_0)
3095 memset (aValues, 0, sizeof(aValues));
3096 glGetIntegerv (GL_VBO_FREE_MEMORY_ATI, aValues);
3098 // total memory free in the pool
3099 addInfo (theDict, "GPU free memory", TCollection_AsciiString() + (aValues[0] / 1024) + " MiB");
3101 if (aValues[1] != aValues[0])
3103 // largest available free block in the pool
3104 addInfo (theDict, "Largest free block", TCollection_AsciiString() + (aValues[1] / 1024) + " MiB");
3106 if (aValues[2] != aValues[0])
3108 // total auxiliary memory free
3109 addInfo (theDict, "Free auxiliary memory", TCollection_AsciiString() + (aValues[2] / 1024) + " MiB");
3114 //current available dedicated video memory (in KiB), currently unused GPU memory
3116 glGetIntegerv (GL_GPU_MEMORY_INFO_CURRENT_AVAILABLE_VIDMEM_NVX, &aValue);
3117 addInfo (theDict, "GPU free memory", TCollection_AsciiString() + (aValue / 1024) + " MiB");
3119 // dedicated video memory, total size (in KiB) of the GPU memory
3120 GLint aDedicated = 0;
3121 glGetIntegerv (GL_GPU_MEMORY_INFO_DEDICATED_VIDMEM_NVX, &aDedicated);
3122 addInfo (theDict, "GPU memory", TCollection_AsciiString() + (aDedicated / 1024) + " MiB");
3124 // total available memory, total size (in KiB) of the memory available for allocations
3125 glGetIntegerv (GL_GPU_MEMORY_INFO_TOTAL_AVAILABLE_MEMORY_NVX, &aValue);
3126 if (aValue != aDedicated)
3128 // different only for special configurations
3129 addInfo (theDict, "Total memory", TCollection_AsciiString() + (aValue / 1024) + " MiB");
3133 else if (myFuncs->wglGetGPUInfoAMD != NULL
3134 && myFuncs->wglGetContextGPUIDAMD != NULL)
3136 GLuint aTotalMemMiB = 0;
3137 UINT anAmdId = myFuncs->wglGetContextGPUIDAMD ((HGLRC )myGContext);
3140 if (myFuncs->wglGetGPUInfoAMD (anAmdId, WGL_GPU_RAM_AMD, GL_UNSIGNED_INT, sizeof(aTotalMemMiB), &aTotalMemMiB) > 0)
3142 addInfo (theDict, "GPU memory", TCollection_AsciiString() + (int )aTotalMemMiB + " MiB");
3149 #if !defined(GL_ES_VERSION_2_0) && !defined(__APPLE__) && !defined(_WIN32)
3150 // GLX_RENDERER_VENDOR_ID_MESA
3151 if (myFuncs->glXQueryCurrentRendererIntegerMESA != NULL)
3153 unsigned int aVMemMiB = 0;
3154 if (myFuncs->glXQueryCurrentRendererIntegerMESA (GLX_RENDERER_VIDEO_MEMORY_MESA, &aVMemMiB) != False)
3156 addInfo (theDict, "GPU memory", TCollection_AsciiString() + int(aVMemMiB) + " MiB");
3162 // =======================================================================
3163 // function : DiagnosticInfo
3165 // =======================================================================
3166 void OpenGl_Context::DiagnosticInformation (TColStd_IndexedDataMapOfStringString& theDict,
3167 Graphic3d_DiagnosticInfo theFlags) const
3169 if ((theFlags & Graphic3d_DiagnosticInfo_NativePlatform) != 0)
3171 #if defined(HAVE_EGL)
3172 addInfo (theDict, "EGLVersion", ::eglQueryString ((EGLDisplay )myDisplay, EGL_VERSION));
3173 addInfo (theDict, "EGLVendor", ::eglQueryString ((EGLDisplay )myDisplay, EGL_VENDOR));
3174 addInfo (theDict, "EGLClientAPIs", ::eglQueryString ((EGLDisplay )myDisplay, EGL_CLIENT_APIS));
3175 if ((theFlags & Graphic3d_DiagnosticInfo_Extensions) != 0)
3177 addInfo (theDict, "EGLExtensions", ::eglQueryString ((EGLDisplay )myDisplay, EGL_EXTENSIONS));
3179 #elif defined(_WIN32)
3180 if ((theFlags & Graphic3d_DiagnosticInfo_Extensions) != 0
3181 && myFuncs->wglGetExtensionsStringARB != NULL)
3183 const char* aWglExts = myFuncs->wglGetExtensionsStringARB ((HDC )myWindowDC);
3184 addInfo (theDict, "WGLExtensions", aWglExts);
3186 #elif defined(__APPLE__)
3189 Display* aDisplay = (Display*)myDisplay;
3190 const int aScreen = DefaultScreen(aDisplay);
3191 addInfo (theDict, "GLXDirectRendering", ::glXIsDirect (aDisplay, (GLXContext )myGContext) ? "Yes" : "No");
3192 addInfo (theDict, "GLXVendor", ::glXQueryServerString (aDisplay, aScreen, GLX_VENDOR));
3193 addInfo (theDict, "GLXVersion", ::glXQueryServerString (aDisplay, aScreen, GLX_VERSION));
3194 if ((theFlags & Graphic3d_DiagnosticInfo_Extensions) != 0)
3196 const char* aGlxExts = ::glXQueryExtensionsString (aDisplay, aScreen);
3197 addInfo(theDict, "GLXExtensions", aGlxExts);
3200 addInfo (theDict, "GLXClientVendor", ::glXGetClientString (aDisplay, GLX_VENDOR));
3201 addInfo (theDict, "GLXClientVersion", ::glXGetClientString (aDisplay, GLX_VERSION));
3202 if ((theFlags & Graphic3d_DiagnosticInfo_Extensions) != 0)
3204 addInfo (theDict, "GLXClientExtensions", ::glXGetClientString (aDisplay, GLX_EXTENSIONS));
3209 if ((theFlags & Graphic3d_DiagnosticInfo_Device) != 0)
3211 Standard_Integer aDriverVer[2] = {};
3212 ReadGlVersion (aDriverVer[0], aDriverVer[1]);
3213 addInfo (theDict, "GLvendor", (const char*)::glGetString (GL_VENDOR));
3214 addInfo (theDict, "GLdevice", (const char*)::glGetString (GL_RENDERER));
3215 #ifdef __EMSCRIPTEN__
3216 if (checkEnableWebGlExtension (*this, "GL_WEBGL_debug_renderer_info"))
3218 if (const char* aVendor = (const char*)::glGetString (0x9245))
3220 addInfo (theDict, "GLunmaskedVendor", aVendor);
3222 if (const char* aDevice = (const char*)::glGetString (0x9246))
3224 addInfo (theDict, "GLunmaskedDevice", aDevice);
3229 addInfo (theDict, "GLversion", (const char*)::glGetString (GL_VERSION));
3230 if (myGlVerMajor != aDriverVer[0]
3231 || myGlVerMinor != aDriverVer[1])
3233 addInfo (theDict, "GLversionOcct", TCollection_AsciiString (myGlVerMajor) + "." + TCollection_AsciiString (myGlVerMinor));
3235 if (IsGlGreaterEqual (2, 0))
3237 addInfo (theDict, "GLSLversion", (const char*)::glGetString (GL_SHADING_LANGUAGE_VERSION));
3241 addInfo (theDict, "GLdebug", "ON");
3245 if ((theFlags & Graphic3d_DiagnosticInfo_Limits) != 0)
3247 addInfo (theDict, "Max texture size", TCollection_AsciiString(myMaxTexDim));
3248 addInfo (theDict, "Max FBO dump size", TCollection_AsciiString() + myMaxDumpSizeX + "x" + myMaxDumpSizeY);
3249 addInfo (theDict, "Max combined texture units", TCollection_AsciiString(myMaxTexCombined));
3250 addInfo (theDict, "Max MSAA samples", TCollection_AsciiString(myMaxMsaaSamples));
3253 if ((theFlags & Graphic3d_DiagnosticInfo_FrameBuffer) != 0)
3255 GLint aViewport[4] = {};
3256 ::glGetIntegerv (GL_VIEWPORT, aViewport);
3257 addInfo (theDict, "Viewport", TCollection_AsciiString() + aViewport[2] + "x" + aViewport[3]);
3260 if ((theFlags & Graphic3d_DiagnosticInfo_Memory) != 0)
3262 MemoryInfo (theDict);
3265 if ((theFlags & Graphic3d_DiagnosticInfo_Extensions) != 0)
3267 #if !defined(GL_ES_VERSION_2_0)
3268 if (IsGlGreaterEqual (3, 0)
3269 && myFuncs->glGetStringi != NULL)
3271 TCollection_AsciiString anExtList;
3273 ::glGetIntegerv (GL_NUM_EXTENSIONS, &anExtNb);
3274 for (GLint anIter = 0; anIter < anExtNb; ++anIter)
3276 const char* anExtension = (const char*)myFuncs->glGetStringi (GL_EXTENSIONS, (GLuint)anIter);
3277 if (!anExtList.IsEmpty())
3281 anExtList += anExtension;
3283 addInfo(theDict, "GLextensions", anExtList);
3288 addInfo (theDict, "GLextensions", (const char*)::glGetString (GL_EXTENSIONS));
3293 // =======================================================================
3294 // function : GetResource
3296 // =======================================================================
3297 const Handle(OpenGl_Resource)& OpenGl_Context::GetResource (const TCollection_AsciiString& theKey) const
3299 return mySharedResources->IsBound (theKey) ? mySharedResources->Find (theKey) : NULL_GL_RESOURCE;
3302 // =======================================================================
3303 // function : ShareResource
3305 // =======================================================================
3306 Standard_Boolean OpenGl_Context::ShareResource (const TCollection_AsciiString& theKey,
3307 const Handle(OpenGl_Resource)& theResource)
3309 if (theKey.IsEmpty() || theResource.IsNull())
3311 return Standard_False;
3313 return mySharedResources->Bind (theKey, theResource);
3316 // =======================================================================
3317 // function : ReleaseResource
3319 // =======================================================================
3320 void OpenGl_Context::ReleaseResource (const TCollection_AsciiString& theKey,
3321 const Standard_Boolean theToDelay)
3323 if (!mySharedResources->IsBound (theKey))
3327 const Handle(OpenGl_Resource)& aRes = mySharedResources->Find (theKey);
3328 if (aRes->GetRefCount() > 1)
3335 myDelayed->Bind (theKey, 1);
3339 aRes->Release (this);
3340 mySharedResources->UnBind (theKey);
3344 // =======================================================================
3345 // function : ReleaseDelayed
3347 // =======================================================================
3348 void OpenGl_Context::ReleaseDelayed()
3350 // release queued elements
3351 while (!myUnusedResources->IsEmpty())
3353 myUnusedResources->First()->Release (this);
3354 myUnusedResources->RemoveFirst();
3357 // release delayed shared resources
3358 NCollection_Vector<TCollection_AsciiString> aDeadList;
3359 for (NCollection_DataMap<TCollection_AsciiString, Standard_Integer>::Iterator anIter (*myDelayed);
3360 anIter.More(); anIter.Next())
3362 if (++anIter.ChangeValue() <= 2)
3364 continue; // postpone release one more frame to ensure noone use it periodically
3367 const TCollection_AsciiString& aKey = anIter.Key();
3368 if (!mySharedResources->IsBound (aKey))
3370 // mixed unshared strategy delayed/undelayed was used!
3371 aDeadList.Append (aKey);
3375 const Handle(OpenGl_Resource)& aRes = mySharedResources->ChangeFind (aKey);
3376 if (aRes->GetRefCount() > 1)
3378 // should be only 1 instance in mySharedResources
3379 // if not - resource was reused again
3380 aDeadList.Append (aKey);
3384 // release resource if no one requiested it more than 2 redraw calls
3385 aRes->Release (this);
3386 mySharedResources->UnBind (aKey);
3387 aDeadList.Append (aKey);
3390 for (Standard_Integer anIter = 0; anIter < aDeadList.Length(); ++anIter)
3392 myDelayed->UnBind (aDeadList.Value (anIter));
3396 // =======================================================================
3397 // function : BindTextures
3399 // =======================================================================
3400 Handle(OpenGl_TextureSet) OpenGl_Context::BindTextures (const Handle(OpenGl_TextureSet)& theTextures,
3401 const Handle(OpenGl_ShaderProgram)& theProgram)
3403 const Standard_Integer aTextureSetBits = !theTextures.IsNull() ? theTextures->TextureSetBits() : 0;
3404 const Standard_Integer aProgramBits = !theProgram.IsNull() ? theProgram->TextureSetBits() : 0;
3405 Standard_Integer aMissingBits = aProgramBits & ~aTextureSetBits;
3406 if (aMissingBits != 0
3407 && myTextureRgbaBlack.IsNull())
3409 // allocate mock textures
3410 myTextureRgbaBlack = new OpenGl_Texture();
3411 myTextureRgbaWhite = new OpenGl_Texture();
3412 Image_PixMap anImage;
3413 anImage.InitZero (Image_Format_RGBA, 2, 2, 0, (Standard_Byte )0);
3414 if (!myTextureRgbaBlack->Init (this, OpenGl_TextureFormat::Create<GLubyte, 4>(), Graphic3d_Vec2i (2, 2), Graphic3d_TOT_2D, &anImage))
3416 PushMessage (GL_DEBUG_SOURCE_APPLICATION, GL_DEBUG_TYPE_PORTABILITY, 0, GL_DEBUG_SEVERITY_HIGH,
3417 "Error: unable to create unit mock PBR texture map.");
3419 anImage.InitZero (Image_Format_RGBA, 2, 2, 0, (Standard_Byte )255);
3420 if (!myTextureRgbaWhite->Init (this, OpenGl_TextureFormat::Create<GLubyte, 4>(), Graphic3d_Vec2i (2, 2), Graphic3d_TOT_2D, &anImage))
3422 PushMessage (GL_DEBUG_SOURCE_APPLICATION, GL_DEBUG_TYPE_PORTABILITY, 0, GL_DEBUG_SEVERITY_HIGH,
3423 "Error: unable to create normal mock PBR texture map.");
3427 Handle(OpenGl_TextureSet) anOldTextures = myActiveTextures;
3428 if (myActiveTextures != theTextures)
3430 Handle(OpenGl_Context) aThisCtx (this);
3431 OpenGl_TextureSet::Iterator aTextureIterOld (myActiveTextures), aTextureIterNew (theTextures);
3434 if (!aTextureIterNew.More())
3436 for (; aTextureIterOld.More(); aTextureIterOld.Next())
3438 if (const Handle(OpenGl_Texture)& aTextureOld = aTextureIterOld.Value())
3440 aTextureOld->Unbind (aThisCtx, aTextureIterOld.Unit());
3441 #if !defined(GL_ES_VERSION_2_0)
3444 OpenGl_Sampler::resetGlobalTextureParams (aThisCtx, *aTextureOld, aTextureOld->Sampler()->Parameters());
3452 const Handle(OpenGl_Texture)& aTextureNew = aTextureIterNew.Value();
3453 if (aTextureIterOld.More())
3455 const Handle(OpenGl_Texture)& aTextureOld = aTextureIterOld.Value();
3456 if (aTextureNew == aTextureOld
3457 && aTextureIterNew.Unit() == aTextureIterOld.Unit())
3459 aTextureIterNew.Next();
3460 aTextureIterOld.Next();
3463 else if (aTextureNew.IsNull()
3464 || !aTextureNew->IsValid())
3466 if (!aTextureOld.IsNull())
3468 aTextureOld->Unbind (aThisCtx, aTextureIterOld.Unit());
3469 #if !defined(GL_ES_VERSION_2_0)
3472 OpenGl_Sampler::resetGlobalTextureParams (aThisCtx, *aTextureOld, aTextureOld->Sampler()->Parameters());
3477 aTextureIterNew.Next();
3478 aTextureIterOld.Next();
3482 aTextureIterOld.Next();
3484 if (aTextureNew.IsNull())
3486 aTextureIterNew.Next();
3490 const Graphic3d_TextureUnit aTexUnit = aTextureIterNew.Unit();
3491 if (aTexUnit >= myMaxTexCombined)
3493 PushMessage (GL_DEBUG_SOURCE_APPLICATION, GL_DEBUG_TYPE_ERROR, 0, GL_DEBUG_SEVERITY_HIGH,
3494 TCollection_AsciiString("Texture unit ") + aTexUnit + " for " + aTextureNew->ResourceId() + " exceeds hardware limit " + myMaxTexCombined);
3495 aTextureIterNew.Next();
3499 aTextureNew->Bind (aThisCtx, aTexUnit);
3500 if (aTextureNew->Sampler()->ToUpdateParameters())
3502 if (aTextureNew->Sampler()->IsImmutable())
3504 aTextureNew->Sampler()->Init (aThisCtx, *aTextureNew);
3508 OpenGl_Sampler::applySamplerParams (aThisCtx, aTextureNew->Sampler()->Parameters(), aTextureNew->Sampler().get(), aTextureNew->GetTarget(), aTextureNew->HasMipmaps());
3511 #if !defined(GL_ES_VERSION_2_0)
3514 OpenGl_Sampler::applyGlobalTextureParams (aThisCtx, *aTextureNew, aTextureNew->Sampler()->Parameters());
3517 aTextureIterNew.Next();
3519 myActiveTextures = theTextures;
3522 if (myActiveMockTextures != aMissingBits)
3524 myActiveMockTextures = aMissingBits;
3525 for (Standard_Integer aBitIter = 0; aMissingBits != 0; ++aBitIter)
3527 Standard_Integer aUnitMask = 1 << aBitIter;
3528 if ((aUnitMask & aMissingBits) != 0)
3530 aMissingBits = aMissingBits & ~aUnitMask;
3531 if (aBitIter == Graphic3d_TextureUnit_Normal)
3533 myTextureRgbaBlack->Bind (this, static_cast<Graphic3d_TextureUnit>(aBitIter));
3537 myTextureRgbaWhite->Bind (this, static_cast<Graphic3d_TextureUnit>(aBitIter));
3543 return anOldTextures;
3546 // =======================================================================
3547 // function : BindProgram
3549 // =======================================================================
3550 Standard_Boolean OpenGl_Context::BindProgram (const Handle(OpenGl_ShaderProgram)& theProgram)
3552 if (core20fwd == NULL)
3554 return Standard_False;
3556 else if (myActiveProgram == theProgram)
3558 return Standard_True;
3561 if (theProgram.IsNull()
3562 || !theProgram->IsValid())
3564 if (!myActiveProgram.IsNull())
3566 core20fwd->glUseProgram (OpenGl_ShaderProgram::NO_PROGRAM);
3567 myActiveProgram.Nullify();
3569 return Standard_False;
3572 myActiveProgram = theProgram;
3573 core20fwd->glUseProgram (theProgram->ProgramId());
3574 return Standard_True;
3577 // =======================================================================
3578 // function : BindDefaultVao
3580 // =======================================================================
3581 void OpenGl_Context::BindDefaultVao()
3583 #if !defined(GL_ES_VERSION_2_0)
3584 if (myDefaultVao == 0
3590 core32->glBindVertexArray (myDefaultVao);
3594 // =======================================================================
3595 // function : SetDefaultFrameBuffer
3597 // =======================================================================
3598 Handle(OpenGl_FrameBuffer) OpenGl_Context::SetDefaultFrameBuffer (const Handle(OpenGl_FrameBuffer)& theFbo)
3600 Handle(OpenGl_FrameBuffer) aFbo = myDefaultFbo;
3601 myDefaultFbo = theFbo;
3605 // =======================================================================
3606 // function : SetShadingMaterial
3608 // =======================================================================
3609 void OpenGl_Context::SetShadingMaterial (const OpenGl_Aspects* theAspect,
3610 const Handle(Graphic3d_PresentationAttributes)& theHighlight)
3612 const Handle(Graphic3d_Aspects)& anAspect = (!theHighlight.IsNull() && !theHighlight->BasicFillAreaAspect().IsNull())
3613 ? (const Handle(Graphic3d_Aspects)& )theHighlight->BasicFillAreaAspect()
3614 : theAspect->Aspect();
3616 const bool toDistinguish = anAspect->Distinguish();
3617 const bool toMapTexture = anAspect->ToMapTexture();
3618 const Graphic3d_MaterialAspect& aMatFrontSrc = anAspect->FrontMaterial();
3619 const Graphic3d_MaterialAspect& aMatBackSrc = toDistinguish
3620 ? anAspect->BackMaterial()
3622 const Quantity_Color& aFrontIntColor = anAspect->InteriorColor();
3623 const Quantity_Color& aBackIntColor = toDistinguish
3624 ? anAspect->BackInteriorColor()
3627 myMatFront.Init (*this, aMatFrontSrc, aFrontIntColor);
3630 myMatBack.Init (*this, aMatBackSrc, aBackIntColor);
3634 myMatBack = myMatFront;
3637 if (!theHighlight.IsNull()
3638 && theHighlight->BasicFillAreaAspect().IsNull())
3640 myMatFront.SetColor (theHighlight->ColorRGBA());
3641 myMatBack .SetColor (theHighlight->ColorRGBA());
3644 Standard_ShortReal anAlphaFront = 1.0f;
3645 Standard_ShortReal anAlphaBack = 1.0f;
3646 if (CheckIsTransparent (theAspect, theHighlight, anAlphaFront, anAlphaBack))
3648 myMatFront.Common.Diffuse.a() = anAlphaFront;
3649 myMatBack .Common.Diffuse.a() = anAlphaBack;
3651 myMatFront.Pbr.BaseColor.a() = anAlphaFront;
3652 myMatBack .Pbr.BaseColor.a() = anAlphaBack;
3655 // do not update material properties in case of zero reflection mode,
3656 // because GL lighting will be disabled by OpenGl_PrimitiveArray::DrawArray() anyway.
3657 const OpenGl_MaterialState& aMatState = myShaderManager->MaterialState();
3658 float anAlphaCutoff = anAspect->AlphaMode() == Graphic3d_AlphaMode_Mask
3659 ? anAspect->AlphaCutoff()
3661 if (anAspect->ToDrawEdges())
3663 if (anAspect->InteriorStyle() == Aspect_IS_EMPTY
3664 || (anAspect->InteriorStyle() == Aspect_IS_SOLID
3665 && anAspect->EdgeColorRGBA().Alpha() < 1.0f))
3667 anAlphaCutoff = 0.285f;
3670 if (theAspect->ShadingModel() == Graphic3d_TOSM_UNLIT)
3672 if (anAlphaCutoff == aMatState.AlphaCutoff())
3677 else if (myMatFront == aMatState.FrontMaterial()
3678 && myMatBack == aMatState.BackMaterial()
3679 && toDistinguish == aMatState.ToDistinguish()
3680 && toMapTexture == aMatState.ToMapTexture()
3681 && anAlphaCutoff == aMatState.AlphaCutoff())
3686 myShaderManager->UpdateMaterialStateTo (myMatFront, myMatBack, anAlphaCutoff, toDistinguish, toMapTexture);
3689 // =======================================================================
3690 // function : CheckIsTransparent
3692 // =======================================================================
3693 Standard_Boolean OpenGl_Context::CheckIsTransparent (const OpenGl_Aspects* theAspect,
3694 const Handle(Graphic3d_PresentationAttributes)& theHighlight,
3695 Standard_ShortReal& theAlphaFront,
3696 Standard_ShortReal& theAlphaBack)
3698 const Handle(Graphic3d_Aspects)& anAspect = (!theHighlight.IsNull() && !theHighlight->BasicFillAreaAspect().IsNull())
3699 ? (const Handle(Graphic3d_Aspects)& )theHighlight->BasicFillAreaAspect()
3700 : theAspect->Aspect();
3702 const bool toDistinguish = anAspect->Distinguish();
3703 const Graphic3d_MaterialAspect& aMatFrontSrc = anAspect->FrontMaterial();
3704 const Graphic3d_MaterialAspect& aMatBackSrc = toDistinguish
3705 ? anAspect->BackMaterial()
3708 // handling transparency
3709 if (!theHighlight.IsNull()
3710 && theHighlight->BasicFillAreaAspect().IsNull())
3712 theAlphaFront = theHighlight->ColorRGBA().Alpha();
3713 theAlphaBack = theHighlight->ColorRGBA().Alpha();
3717 theAlphaFront = aMatFrontSrc.Alpha();
3718 theAlphaBack = aMatBackSrc .Alpha();
3721 if (anAspect->AlphaMode() == Graphic3d_AlphaMode_BlendAuto)
3723 return theAlphaFront < 1.0f
3724 || theAlphaBack < 1.0f;
3726 return anAspect->AlphaMode() == Graphic3d_AlphaMode_Blend;
3729 // =======================================================================
3730 // function : SetColor4fv
3732 // =======================================================================
3733 void OpenGl_Context::SetColor4fv (const OpenGl_Vec4& theColor)
3735 if (!myActiveProgram.IsNull())
3737 if (const OpenGl_ShaderUniformLocation& aLoc = myActiveProgram->GetStateLocation (OpenGl_OCCT_COLOR))
3739 myActiveProgram->SetUniform (this, aLoc, Vec4FromQuantityColor (theColor));
3742 #if !defined(GL_ES_VERSION_2_0)
3743 else if (core11 != NULL)
3745 core11->glColor4fv (theColor.GetData());
3750 // =======================================================================
3751 // function : SetTypeOfLine
3753 // =======================================================================
3754 void OpenGl_Context::SetTypeOfLine (const Aspect_TypeOfLine theType,
3755 const Standard_ShortReal theFactor)
3757 SetLineStipple (theFactor, Graphic3d_Aspects::DefaultLinePatternForType (theType));
3760 // =======================================================================
3761 // function : SetLineStipple
3763 // =======================================================================
3764 void OpenGl_Context::SetLineStipple (const Standard_ShortReal theFactor,
3765 const uint16_t thePattern)
3767 if (!myActiveProgram.IsNull())
3769 if (const OpenGl_ShaderUniformLocation aPatternLoc = myActiveProgram->GetStateLocation (OpenGl_OCCT_LINE_STIPPLE_PATTERN))
3771 if (hasGlslBitwiseOps != OpenGl_FeatureNotAvailable)
3773 myActiveProgram->SetUniform (this, aPatternLoc, (Standard_Integer )thePattern);
3777 Standard_Integer aPatArr[16] = {};
3778 for (unsigned int aBit = 0; aBit < 16; ++aBit)
3780 aPatArr[aBit] = ((unsigned int)(thePattern) & (1U << aBit)) != 0 ? 1 : 0;
3782 myActiveProgram->SetUniform (this, aPatternLoc, 16, aPatArr);
3784 myActiveProgram->SetUniform (this, myActiveProgram->GetStateLocation (OpenGl_OCCT_LINE_STIPPLE_FACTOR), theFactor);
3789 #if !defined(GL_ES_VERSION_2_0)
3790 if (thePattern != 0xFFFF)
3794 core11fwd->glEnable (GL_LINE_STIPPLE);
3796 core11->glLineStipple (static_cast<GLint> (theFactor),
3797 static_cast<GLushort> (thePattern));
3804 core11fwd->glDisable (GL_LINE_STIPPLE);
3810 // =======================================================================
3811 // function : SetLineWidth
3813 // =======================================================================
3814 void OpenGl_Context::SetLineWidth (const Standard_ShortReal theWidth)
3818 // glLineWidth() is still defined within Core Profile, but has no effect with values != 1.0f
3819 core11fwd->glLineWidth (theWidth * myLineWidthScale);
3823 // =======================================================================
3824 // function : SetTextureMatrix
3826 // =======================================================================
3827 void OpenGl_Context::SetTextureMatrix (const Handle(Graphic3d_TextureParams)& theParams)
3829 if (theParams.IsNull())
3833 else if (!myActiveProgram.IsNull())
3835 const GLint aUniLoc = myActiveProgram->GetStateLocation (OpenGl_OCCT_TEXTURE_TRSF2D);
3836 if (aUniLoc == OpenGl_ShaderProgram::INVALID_LOCATION)
3841 // pack transformation parameters
3842 OpenGl_Vec4 aTrsf[2] =
3844 OpenGl_Vec4 (-theParams->Translation().x(),
3845 -theParams->Translation().y(),
3846 theParams->Scale().x(),
3847 theParams->Scale().y()),
3848 OpenGl_Vec4 (static_cast<float> (std::sin (-theParams->Rotation() * M_PI / 180.0)),
3849 static_cast<float> (std::cos (-theParams->Rotation() * M_PI / 180.0)),
3852 myActiveProgram->SetUniform (this, aUniLoc, 2, aTrsf);
3856 #if !defined(GL_ES_VERSION_2_0)
3859 GLint aMatrixMode = GL_TEXTURE;
3860 ::glGetIntegerv (GL_MATRIX_MODE, &aMatrixMode);
3862 core11->glMatrixMode (GL_TEXTURE);
3863 OpenGl_Mat4 aTextureMat;
3864 const Graphic3d_Vec2& aScale = theParams->Scale();
3865 const Graphic3d_Vec2& aTrans = theParams->Translation();
3866 Graphic3d_TransformUtils::Scale (aTextureMat, aScale.x(), aScale.y(), 1.0f);
3867 Graphic3d_TransformUtils::Translate (aTextureMat, -aTrans.x(), -aTrans.y(), 0.0f);
3868 Graphic3d_TransformUtils::Rotate (aTextureMat, -theParams->Rotation(), 0.0f, 0.0f, 1.0f);
3869 core11->glLoadMatrixf (aTextureMat);
3870 core11->glMatrixMode (aMatrixMode);
3875 // =======================================================================
3876 // function : SetPointSize
3878 // =======================================================================
3879 void OpenGl_Context::SetPointSize (const Standard_ShortReal theSize)
3881 if (!myActiveProgram.IsNull())
3883 myActiveProgram->SetUniform (this, myActiveProgram->GetStateLocation (OpenGl_OCCT_POINT_SIZE), theSize);
3884 #if !defined(GL_ES_VERSION_2_0)
3885 //myContext->core11fwd->glEnable (GL_VERTEX_PROGRAM_POINT_SIZE);
3888 #if !defined(GL_ES_VERSION_2_0)
3891 core11fwd->glPointSize (theSize);
3892 if (core20fwd != NULL)
3894 //myContext->core11fwd->glDisable (GL_VERTEX_PROGRAM_POINT_SIZE);
3900 // =======================================================================
3901 // function : SetPointSpriteOrigin
3903 // =======================================================================
3904 void OpenGl_Context::SetPointSpriteOrigin()
3906 #if !defined(GL_ES_VERSION_2_0)
3907 if (core15fwd == NULL)
3912 const int aNewState = !myActiveProgram.IsNull() ? GL_UPPER_LEFT : GL_LOWER_LEFT;
3913 if (myPointSpriteOrig != aNewState)
3915 myPointSpriteOrig = aNewState;
3916 core15fwd->glPointParameteri (GL_POINT_SPRITE_COORD_ORIGIN, aNewState);
3921 // =======================================================================
3922 // function : SetGlNormalizeEnabled
3924 // =======================================================================
3925 Standard_Boolean OpenGl_Context::SetGlNormalizeEnabled (Standard_Boolean isEnabled)
3927 if (isEnabled == myIsGlNormalizeEnabled)
3929 return myIsGlNormalizeEnabled;
3932 Standard_Boolean anOldGlNormalize = myIsGlNormalizeEnabled;
3934 myIsGlNormalizeEnabled = isEnabled;
3936 #if !defined(GL_ES_VERSION_2_0)
3941 ::glEnable (GL_NORMALIZE);
3945 ::glDisable (GL_NORMALIZE);
3950 return anOldGlNormalize;
3953 // =======================================================================
3954 // function : SetPolygonMode
3956 // =======================================================================
3957 Standard_Integer OpenGl_Context::SetPolygonMode (const Standard_Integer theMode)
3959 if (myPolygonMode == theMode)
3961 return myPolygonMode;
3964 const Standard_Integer anOldPolygonMode = myPolygonMode;
3966 myPolygonMode = theMode;
3968 #if !defined(GL_ES_VERSION_2_0)
3969 ::glPolygonMode (GL_FRONT_AND_BACK, (GLenum)theMode);
3972 return anOldPolygonMode;
3975 // =======================================================================
3976 // function : SetPolygonHatchEnabled
3978 // =======================================================================
3979 bool OpenGl_Context::SetPolygonHatchEnabled (const bool theIsEnabled)
3981 if (myHatchStyles.IsNull())
3985 else if (myHatchStyles->IsEnabled() == theIsEnabled)
3987 return theIsEnabled;
3990 return myHatchStyles->SetEnabled (this, theIsEnabled);
3993 // =======================================================================
3994 // function : SetPolygonHatchStyle
3996 // =======================================================================
3997 Standard_Integer OpenGl_Context::SetPolygonHatchStyle (const Handle(Graphic3d_HatchStyle)& theStyle)
3999 if (theStyle.IsNull())
4004 if (myHatchStyles.IsNull())
4006 if (!GetResource ("OpenGl_LineAttributes", myHatchStyles))
4008 // share and register for release once the resource is no longer used
4009 myHatchStyles = new OpenGl_LineAttributes();
4010 ShareResource ("OpenGl_LineAttributes", myHatchStyles);
4013 if (myHatchStyles->TypeOfHatch() == theStyle->HatchType())
4015 return theStyle->HatchType();
4018 return myHatchStyles->SetTypeOfHatch (this, theStyle);
4021 // =======================================================================
4022 // function : SetPolygonOffset
4024 // =======================================================================
4025 void OpenGl_Context::SetPolygonOffset (const Graphic3d_PolygonOffset& theOffset)
4027 const bool toFillOld = (myPolygonOffset.Mode & Aspect_POM_Fill) == Aspect_POM_Fill;
4028 const bool toFillNew = (theOffset.Mode & Aspect_POM_Fill) == Aspect_POM_Fill;
4029 if (toFillNew != toFillOld)
4033 glEnable (GL_POLYGON_OFFSET_FILL);
4037 glDisable (GL_POLYGON_OFFSET_FILL);
4041 #if !defined(GL_ES_VERSION_2_0)
4042 const bool toLineOld = (myPolygonOffset.Mode & Aspect_POM_Line) == Aspect_POM_Line;
4043 const bool toLineNew = (theOffset.Mode & Aspect_POM_Line) == Aspect_POM_Line;
4044 if (toLineNew != toLineOld)
4048 glEnable (GL_POLYGON_OFFSET_LINE);
4052 glDisable (GL_POLYGON_OFFSET_LINE);
4056 const bool toPointOld = (myPolygonOffset.Mode & Aspect_POM_Point) == Aspect_POM_Point;
4057 const bool toPointNew = (theOffset.Mode & Aspect_POM_Point) == Aspect_POM_Point;
4058 if (toPointNew != toPointOld)
4062 glEnable (GL_POLYGON_OFFSET_POINT);
4066 glDisable (GL_POLYGON_OFFSET_POINT);
4071 if (myPolygonOffset.Factor != theOffset.Factor
4072 || myPolygonOffset.Units != theOffset.Units)
4074 glPolygonOffset (theOffset.Factor, theOffset.Units);
4076 myPolygonOffset = theOffset;
4079 // =======================================================================
4080 // function : ApplyModelWorldMatrix
4082 // =======================================================================
4083 void OpenGl_Context::ApplyModelWorldMatrix()
4085 if (myShaderManager->ModelWorldState().ModelWorldMatrix() != ModelWorldState.Current())
4087 myShaderManager->UpdateModelWorldStateTo (ModelWorldState.Current());
4091 // =======================================================================
4092 // function : ApplyWorldViewMatrix
4094 // =======================================================================
4095 void OpenGl_Context::ApplyWorldViewMatrix()
4097 if (myShaderManager->ModelWorldState().ModelWorldMatrix() != THE_IDENTITY_MATRIX)
4099 myShaderManager->UpdateModelWorldStateTo (THE_IDENTITY_MATRIX);
4101 if (myShaderManager->WorldViewState().WorldViewMatrix() != WorldViewState.Current())
4103 myShaderManager->UpdateWorldViewStateTo (WorldViewState.Current());
4107 // =======================================================================
4108 // function : ApplyModelViewMatrix
4110 // =======================================================================
4111 void OpenGl_Context::ApplyModelViewMatrix()
4113 if (myShaderManager->ModelWorldState().ModelWorldMatrix() != ModelWorldState.Current())
4115 myShaderManager->UpdateModelWorldStateTo (ModelWorldState.Current());
4117 if (myShaderManager->WorldViewState().WorldViewMatrix() != WorldViewState.Current())
4119 myShaderManager->UpdateWorldViewStateTo (WorldViewState.Current());
4123 // =======================================================================
4124 // function : ApplyProjectionMatrix
4126 // =======================================================================
4127 void OpenGl_Context::ApplyProjectionMatrix()
4129 if (myShaderManager->ProjectionState().ProjectionMatrix() != ProjectionState.Current())
4131 myShaderManager->UpdateProjectionStateTo (ProjectionState.Current());
4135 // =======================================================================
4136 // function : EnableFeatures
4138 // =======================================================================
4139 void OpenGl_Context::EnableFeatures() const
4144 // =======================================================================
4145 // function : DisableFeatures
4147 // =======================================================================
4148 void OpenGl_Context::DisableFeatures() const
4150 // Disable stuff that's likely to slow down glDrawPixels.
4151 glDisable(GL_DITHER);
4152 glDisable(GL_BLEND);
4153 glDisable(GL_DEPTH_TEST);
4154 glDisable(GL_STENCIL_TEST);
4156 #if !defined(GL_ES_VERSION_2_0)
4162 glDisable(GL_TEXTURE_1D);
4163 glDisable(GL_TEXTURE_2D);
4165 glDisable(GL_LIGHTING);
4166 glDisable(GL_ALPHA_TEST);
4168 glDisable(GL_LOGIC_OP);
4170 glPixelTransferi(GL_MAP_COLOR, GL_FALSE);
4171 glPixelTransferi(GL_RED_SCALE, 1);
4172 glPixelTransferi(GL_RED_BIAS, 0);
4173 glPixelTransferi(GL_GREEN_SCALE, 1);
4174 glPixelTransferi(GL_GREEN_BIAS, 0);
4175 glPixelTransferi(GL_BLUE_SCALE, 1);
4176 glPixelTransferi(GL_BLUE_BIAS, 0);
4177 glPixelTransferi(GL_ALPHA_SCALE, 1);
4178 glPixelTransferi(GL_ALPHA_BIAS, 0);
4180 if ((myGlVerMajor >= 1) && (myGlVerMinor >= 2))
4182 if (CheckExtension ("GL_CONVOLUTION_1D_EXT"))
4183 glDisable(GL_CONVOLUTION_1D_EXT);
4185 if (CheckExtension ("GL_CONVOLUTION_2D_EXT"))
4186 glDisable(GL_CONVOLUTION_2D_EXT);
4188 if (CheckExtension ("GL_SEPARABLE_2D_EXT"))
4189 glDisable(GL_SEPARABLE_2D_EXT);
4191 if (CheckExtension ("GL_SEPARABLE_2D_EXT"))
4192 glDisable(GL_HISTOGRAM_EXT);
4194 if (CheckExtension ("GL_MINMAX_EXT"))
4195 glDisable(GL_MINMAX_EXT);
4197 if (CheckExtension ("GL_TEXTURE_3D_EXT"))
4198 glDisable(GL_TEXTURE_3D_EXT);
4203 // =======================================================================
4204 // function : SetColorMask
4206 // =======================================================================
4207 bool OpenGl_Context::SetColorMask (bool theToWriteColor)
4209 const GLboolean toWrite = theToWriteColor ? GL_TRUE : GL_FALSE;
4210 glColorMask (toWrite, toWrite, toWrite, toWrite);
4212 const bool anOldValue = myColorMask;
4213 myColorMask = theToWriteColor;
4217 // =======================================================================
4218 // function : SetSampleAlphaToCoverage
4220 // =======================================================================
4221 bool OpenGl_Context::SetSampleAlphaToCoverage (bool theToEnable)
4223 bool toEnable = myAllowAlphaToCov && theToEnable;
4224 if (myAlphaToCoverage == toEnable)
4226 return myAlphaToCoverage;
4229 if (core15fwd != NULL)
4233 //core15fwd->core15fwd->glSampleCoverage (1.0f, GL_FALSE);
4234 core15fwd->glEnable (GL_SAMPLE_ALPHA_TO_COVERAGE);
4238 core15fwd->glDisable (GL_SAMPLE_ALPHA_TO_COVERAGE);
4242 const bool anOldValue = myAlphaToCoverage;
4243 myAlphaToCoverage = toEnable;
4247 // =======================================================================
4248 // function : DumpJson
4250 // =======================================================================
4251 void OpenGl_Context::DumpJson (Standard_OStream& theOStream, Standard_Integer theDepth) const
4253 OCCT_DUMP_TRANSIENT_CLASS_BEGIN (theOStream)
4255 OCCT_DUMP_FIELD_VALUE_NUMERICAL (theOStream, myAnisoMax)
4256 OCCT_DUMP_FIELD_VALUE_NUMERICAL (theOStream, myTexClamp)
4257 OCCT_DUMP_FIELD_VALUE_NUMERICAL (theOStream, myMaxTexDim)
4258 OCCT_DUMP_FIELD_VALUE_NUMERICAL (theOStream, myMaxTexCombined)
4259 OCCT_DUMP_FIELD_VALUE_NUMERICAL (theOStream, myMaxDumpSizeX)
4260 OCCT_DUMP_FIELD_VALUE_NUMERICAL (theOStream, myMaxDumpSizeY)
4261 OCCT_DUMP_FIELD_VALUE_NUMERICAL (theOStream, myMaxClipPlanes)
4262 OCCT_DUMP_FIELD_VALUE_NUMERICAL (theOStream, myMaxMsaaSamples)
4263 OCCT_DUMP_FIELD_VALUE_NUMERICAL (theOStream, myMaxDrawBuffers)
4264 OCCT_DUMP_FIELD_VALUE_NUMERICAL (theOStream, myMaxColorAttachments)
4265 OCCT_DUMP_FIELD_VALUE_NUMERICAL (theOStream, myGlVerMajor)
4266 OCCT_DUMP_FIELD_VALUE_NUMERICAL (theOStream, myGlVerMinor)
4267 OCCT_DUMP_FIELD_VALUE_NUMERICAL (theOStream, myIsInitialized)
4268 OCCT_DUMP_FIELD_VALUE_NUMERICAL (theOStream, myIsStereoBuffers)
4269 OCCT_DUMP_FIELD_VALUE_NUMERICAL (theOStream, myIsGlNormalizeEnabled)
4271 OCCT_DUMP_FIELD_VALUE_NUMERICAL (theOStream, myHasRayTracing)
4272 OCCT_DUMP_FIELD_VALUE_NUMERICAL (theOStream, myHasRayTracingTextures)
4273 OCCT_DUMP_FIELD_VALUE_NUMERICAL (theOStream, myHasRayTracingAdaptiveSampling)
4274 OCCT_DUMP_FIELD_VALUE_NUMERICAL (theOStream, myHasRayTracingAdaptiveSamplingAtomic)
4276 for (int i = 0; i < 4; i++)
4278 OCCT_DUMP_FIELD_VALUE_NUMERICAL (theOStream, myViewport[i])
4281 for (int i = 0; i < 4; i++)
4283 OCCT_DUMP_FIELD_VALUE_NUMERICAL (theOStream, myViewportVirt[i])
4286 OCCT_DUMP_FIELD_VALUE_NUMERICAL (theOStream, myPointSpriteOrig)
4287 OCCT_DUMP_FIELD_VALUE_NUMERICAL (theOStream, myRenderMode)
4288 OCCT_DUMP_FIELD_VALUE_NUMERICAL (theOStream, myPolygonMode)
4289 OCCT_DUMP_FIELD_VALUES_DUMPED (theOStream, theDepth, &myPolygonOffset)
4290 OCCT_DUMP_FIELD_VALUE_NUMERICAL (theOStream, myToCullBackFaces)
4291 OCCT_DUMP_FIELD_VALUE_NUMERICAL (theOStream, myReadBuffer)
4293 OCCT_DUMP_FIELD_VALUE_NUMERICAL (theOStream, myDefaultVao)
4294 OCCT_DUMP_FIELD_VALUE_NUMERICAL (theOStream, myColorMask)
4295 OCCT_DUMP_FIELD_VALUE_NUMERICAL (theOStream, myAllowAlphaToCov)
4296 OCCT_DUMP_FIELD_VALUE_NUMERICAL (theOStream, myAlphaToCoverage)
4297 OCCT_DUMP_FIELD_VALUE_NUMERICAL (theOStream, myIsGlDebugCtx)
4299 OCCT_DUMP_FIELD_VALUE_NUMERICAL (theOStream, myResolution)
4300 OCCT_DUMP_FIELD_VALUE_NUMERICAL (theOStream, myResolutionRatio)
4302 OCCT_DUMP_FIELD_VALUE_NUMERICAL (theOStream, myLineWidthScale)
4303 OCCT_DUMP_FIELD_VALUE_NUMERICAL (theOStream, myLineFeather)
4304 OCCT_DUMP_FIELD_VALUE_NUMERICAL (theOStream, myRenderScale)
4305 OCCT_DUMP_FIELD_VALUE_NUMERICAL (theOStream, myRenderScaleInv)
4307 OCCT_DUMP_FIELD_VALUES_DUMPED (theOStream, theDepth, &ModelWorldState)
4308 OCCT_DUMP_FIELD_VALUES_DUMPED (theOStream, theDepth, &WorldViewState)
4309 OCCT_DUMP_FIELD_VALUES_DUMPED (theOStream, theDepth, &ProjectionState)
4312 // =======================================================================
4313 // function : DumpJsonOpenGlState
4315 // =======================================================================
4316 void OpenGl_Context::DumpJsonOpenGlState (Standard_OStream& theOStream, Standard_Integer)
4318 GLboolean isEnableBlend = glIsEnabled (GL_BLEND);
4319 GLboolean isEnableCullFace = glIsEnabled (GL_CULL_FACE);
4320 GLboolean isEnableDepthTest = glIsEnabled (GL_DEPTH_TEST);
4322 OCCT_DUMP_FIELD_VALUE_NUMERICAL (theOStream, isEnableBlend)
4323 OCCT_DUMP_FIELD_VALUE_NUMERICAL (theOStream, isEnableCullFace)
4324 OCCT_DUMP_FIELD_VALUE_NUMERICAL (theOStream, isEnableDepthTest)