GrGLInterface.h revision 202c4c75fb806f751cf796850bf67fe9793e0643 
1/*
2 * Copyright 2011 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8#ifndef GrGLInterface_DEFINED
9#define GrGLInterface_DEFINED
10
11#include "GrGLFunctions.h"
12#include "GrGLExtensions.h"
13#include "SkRefCnt.h"
14
15////////////////////////////////////////////////////////////////////////////////
16
17/**
18 * Rather than depend on platform-specific GL headers and libraries, we require
19 * the client to provide a struct of GL function pointers. This struct can be
20 * specified per-GrContext as a parameter to GrContext::Create. If NULL is
21 * passed to Create then a "default" GL interface is created. If the default is
22 * also NULL GrContext creation will fail.
23 *
24 * The default interface is returned by GrGLDefaultInterface. This function's
25 * implementation is platform-specific. Several have been provided, along with
26 * an implementation that simply returns NULL.
27 *
28 * By defining GR_GL_PER_GL_CALL_IFACE_CALLBACK to 1 the client can specify a
29 * callback function that will be called prior to each GL function call. See
30 * comments in GrGLConfig.h
31 */
32
33struct GrGLInterface;
34
35const GrGLInterface* GrGLDefaultInterface();
36
37/**
38 * Creates a GrGLInterface for a "native" GL context (e.g. WGL on windows,
39 * GLX on linux, AGL on Mac). The interface is only valid for the GL context
40 * that is current when the interface is created.
41 */
42const GrGLInterface* GrGLCreateNativeInterface();
43
44#if SK_MESA
45/**
46 * Creates a GrGLInterface for an OSMesa context.
47 */
48const GrGLInterface* GrGLCreateMesaInterface();
49#endif
50
51#if SK_ANGLE
52/**
53 * Creates a GrGLInterface for an ANGLE context.
54 */
55const GrGLInterface* GrGLCreateANGLEInterface();
56#endif
57
58/**
59 * Creates a null GrGLInterface that doesn't draw anything. Used for measuring
60 * CPU overhead.
61 */
62const SK_API GrGLInterface* GrGLCreateNullInterface();
63
64/**
65 * Creates a debugging GrGLInterface that doesn't draw anything. Used for
66 * finding memory leaks and invalid memory accesses.
67 */
68const GrGLInterface* GrGLCreateDebugInterface();
69
70#if GR_GL_PER_GL_FUNC_CALLBACK
71typedef void (*GrGLInterfaceCallbackProc)(const GrGLInterface*);
72typedef intptr_t GrGLInterfaceCallbackData;
73#endif
74
75/** Function that returns a new interface identical to "interface" but without support for
76    GL_NV_path_rendering. */
77const GrGLInterface* GrGLInterfaceRemoveNVPR(const GrGLInterface*);
78
79/** Function that returns a new interface identical to "interface" but with support for
80    test version of GL_EXT_debug_marker. */
81const GrGLInterface* GrGLInterfaceAddTestDebugMarker(const GrGLInterface*,
82                                                     GrGLInsertEventMarkerProc insertEventMarkerFn,
83                                                     GrGLPushGroupMarkerProc pushGroupMarkerFn,
84                                                     GrGLPopGroupMarkerProc popGroupMarkerFn);
85
86/**
87 * GrContext uses the following interface to make all calls into OpenGL. When a
88 * GrContext is created it is given a GrGLInterface. The interface's function
89 * pointers must be valid for the OpenGL context associated with the GrContext.
90 * On some platforms, such as Windows, function pointers for OpenGL extensions
91 * may vary between OpenGL contexts. So the caller must be careful to use a
92 * GrGLInterface initialized for the correct context. All functions that should
93 * be available based on the OpenGL's version and extension string must be
94 * non-NULL or GrContext creation will fail. This can be tested with the
95 * validate() method when the OpenGL context has been made current.
96 */
97struct SK_API GrGLInterface : public SkRefCnt {
98private:
99    // simple wrapper class that exists only to initialize a pointer to NULL
100    template <typename FNPTR_TYPE> class GLPtr {
101    public:
102        GLPtr() : fPtr(NULL) {}
103        GLPtr operator=(FNPTR_TYPE ptr) { fPtr = ptr; return *this; }
104        operator FNPTR_TYPE() const { return fPtr; }
105    private:
106        FNPTR_TYPE fPtr;
107    };
108
109    // This is a temporary workaround to keep Chromium's GrGLInterface factories compiling until
110    // they're updated to use the Functions struct.
111    template <typename FNPTR_TYPE> class GLPtrAlias {
112    public:
113        GLPtrAlias(GLPtr<FNPTR_TYPE>* base) : fBase(base) {}
114        void operator=(FNPTR_TYPE ptr) { *fBase = ptr; }
115    private:
116        GLPtr<FNPTR_TYPE>* fBase;
117    };
118
119    typedef SkRefCnt INHERITED;
120
121public:
122    SK_DECLARE_INST_COUNT(GrGLInterface)
123
124    GrGLInterface();
125
126    static GrGLInterface* NewClone(const GrGLInterface*);
127
128    // Validates that the GrGLInterface supports its advertised standard. This means the necessary
129    // function pointers have been initialized for both the GL version and any advertised
130    // extensions.
131    bool validate() const;
132
133    // Indicates the type of GL implementation
134    union {
135        GrGLStandard fStandard;
136        GrGLStandard fBindingsExported; // Legacy name, will be remove when Chromium is updated.
137    };
138
139    GrGLExtensions fExtensions;
140
141    bool hasExtension(const char ext[]) const { return fExtensions.has(ext); }
142
143    /**
144     * The function pointers are in a struct so that we can have a compiler generated assignment
145     * operator.
146     */
147    struct Functions {
148        GLPtr<GrGLActiveTextureProc> fActiveTexture;
149        GLPtr<GrGLAttachShaderProc> fAttachShader;
150        GLPtr<GrGLBeginQueryProc> fBeginQuery;
151        GLPtr<GrGLBindAttribLocationProc> fBindAttribLocation;
152        GLPtr<GrGLBindBufferProc> fBindBuffer;
153        GLPtr<GrGLBindFragDataLocationProc> fBindFragDataLocation;
154        GLPtr<GrGLBindFragDataLocationIndexedProc> fBindFragDataLocationIndexed;
155        GLPtr<GrGLBindFramebufferProc> fBindFramebuffer;
156        GLPtr<GrGLBindRenderbufferProc> fBindRenderbuffer;
157        GLPtr<GrGLBindTextureProc> fBindTexture;
158        GLPtr<GrGLBindVertexArrayProc> fBindVertexArray;
159        GLPtr<GrGLBlendBarrierProc> fBlendBarrier;
160        GLPtr<GrGLBlendColorProc> fBlendColor;
161        GLPtr<GrGLBlendEquationProc> fBlendEquation;
162        GLPtr<GrGLBlendFuncProc> fBlendFunc;
163        GLPtr<GrGLBlitFramebufferProc> fBlitFramebuffer;
164        GLPtr<GrGLBufferDataProc> fBufferData;
165        GLPtr<GrGLBufferSubDataProc> fBufferSubData;
166        GLPtr<GrGLCheckFramebufferStatusProc> fCheckFramebufferStatus;
167        GLPtr<GrGLClearProc> fClear;
168        GLPtr<GrGLClearColorProc> fClearColor;
169        GLPtr<GrGLClearStencilProc> fClearStencil;
170        GLPtr<GrGLColorMaskProc> fColorMask;
171        GLPtr<GrGLCompileShaderProc> fCompileShader;
172        GLPtr<GrGLCompressedTexImage2DProc> fCompressedTexImage2D;
173        GLPtr<GrGLCompressedTexSubImage2DProc> fCompressedTexSubImage2D;
174        GLPtr<GrGLCopyTexSubImage2DProc> fCopyTexSubImage2D;
175        GLPtr<GrGLCopyTextureCHROMIUMProc> fCopyTextureCHROMIUM;
176        GLPtr<GrGLCreateProgramProc> fCreateProgram;
177        GLPtr<GrGLCreateShaderProc> fCreateShader;
178        GLPtr<GrGLCullFaceProc> fCullFace;
179        GLPtr<GrGLDeleteBuffersProc> fDeleteBuffers;
180        GLPtr<GrGLDeleteFramebuffersProc> fDeleteFramebuffers;
181        GLPtr<GrGLDeleteProgramProc> fDeleteProgram;
182        GLPtr<GrGLDeleteQueriesProc> fDeleteQueries;
183        GLPtr<GrGLDeleteRenderbuffersProc> fDeleteRenderbuffers;
184        GLPtr<GrGLDeleteShaderProc> fDeleteShader;
185        GLPtr<GrGLDeleteTexturesProc> fDeleteTextures;
186        GLPtr<GrGLDeleteVertexArraysProc> fDeleteVertexArrays;
187        GLPtr<GrGLDepthMaskProc> fDepthMask;
188        GLPtr<GrGLDisableProc> fDisable;
189        GLPtr<GrGLDisableVertexAttribArrayProc> fDisableVertexAttribArray;
190        GLPtr<GrGLDrawArraysProc> fDrawArrays;
191        GLPtr<GrGLDrawBufferProc> fDrawBuffer;
192        GLPtr<GrGLDrawBuffersProc> fDrawBuffers;
193        GLPtr<GrGLDrawElementsProc> fDrawElements;
194        GLPtr<GrGLEnableProc> fEnable;
195        GLPtr<GrGLEnableVertexAttribArrayProc> fEnableVertexAttribArray;
196        GLPtr<GrGLEndQueryProc> fEndQuery;
197        GLPtr<GrGLFinishProc> fFinish;
198        GLPtr<GrGLFlushProc> fFlush;
199        GLPtr<GrGLFlushMappedBufferRangeProc> fFlushMappedBufferRange;
200        GLPtr<GrGLFramebufferRenderbufferProc> fFramebufferRenderbuffer;
201        GLPtr<GrGLFramebufferTexture2DProc> fFramebufferTexture2D;
202        GLPtr<GrGLFramebufferTexture2DMultisampleProc> fFramebufferTexture2DMultisample;
203        GLPtr<GrGLFrontFaceProc> fFrontFace;
204        GLPtr<GrGLGenBuffersProc> fGenBuffers;
205        GLPtr<GrGLGenFramebuffersProc> fGenFramebuffers;
206        GLPtr<GrGLGenerateMipmapProc> fGenerateMipmap;
207        GLPtr<GrGLGenQueriesProc> fGenQueries;
208        GLPtr<GrGLGenRenderbuffersProc> fGenRenderbuffers;
209        GLPtr<GrGLGenTexturesProc> fGenTextures;
210        GLPtr<GrGLGenVertexArraysProc> fGenVertexArrays;
211        GLPtr<GrGLGetBufferParameterivProc> fGetBufferParameteriv;
212        GLPtr<GrGLGetErrorProc> fGetError;
213        GLPtr<GrGLGetFramebufferAttachmentParameterivProc> fGetFramebufferAttachmentParameteriv;
214        GLPtr<GrGLGetIntegervProc> fGetIntegerv;
215        GLPtr<GrGLGetQueryObjecti64vProc> fGetQueryObjecti64v;
216        GLPtr<GrGLGetQueryObjectivProc> fGetQueryObjectiv;
217        GLPtr<GrGLGetQueryObjectui64vProc> fGetQueryObjectui64v;
218        GLPtr<GrGLGetQueryObjectuivProc> fGetQueryObjectuiv;
219        GLPtr<GrGLGetQueryivProc> fGetQueryiv;
220        GLPtr<GrGLGetProgramInfoLogProc> fGetProgramInfoLog;
221        GLPtr<GrGLGetProgramivProc> fGetProgramiv;
222        GLPtr<GrGLGetRenderbufferParameterivProc> fGetRenderbufferParameteriv;
223        GLPtr<GrGLGetShaderInfoLogProc> fGetShaderInfoLog;
224        GLPtr<GrGLGetShaderivProc> fGetShaderiv;
225        GLPtr<GrGLGetShaderPrecisionFormatProc> fGetShaderPrecisionFormat;
226        GLPtr<GrGLGetStringProc> fGetString;
227        GLPtr<GrGLGetStringiProc> fGetStringi;
228        GLPtr<GrGLGetTexLevelParameterivProc> fGetTexLevelParameteriv;
229        GLPtr<GrGLGetUniformLocationProc> fGetUniformLocation;
230        GLPtr<GrGLInsertEventMarkerProc> fInsertEventMarker;
231        GLPtr<GrGLInvalidateBufferDataProc> fInvalidateBufferData;
232        GLPtr<GrGLInvalidateBufferSubDataProc> fInvalidateBufferSubData;
233        GLPtr<GrGLInvalidateFramebufferProc> fInvalidateFramebuffer;
234        GLPtr<GrGLInvalidateSubFramebufferProc> fInvalidateSubFramebuffer;
235        GLPtr<GrGLInvalidateTexImageProc> fInvalidateTexImage;
236        GLPtr<GrGLInvalidateTexSubImageProc> fInvalidateTexSubImage;
237        GLPtr<GrGLLineWidthProc> fLineWidth;
238        GLPtr<GrGLLinkProgramProc> fLinkProgram;
239        GLPtr<GrGLMapBufferProc> fMapBuffer;
240        GLPtr<GrGLMapBufferRangeProc> fMapBufferRange;
241        GLPtr<GrGLMapBufferSubDataProc> fMapBufferSubData;
242        GLPtr<GrGLMapTexSubImage2DProc> fMapTexSubImage2D;
243        GLPtr<GrGLPixelStoreiProc> fPixelStorei;
244        GLPtr<GrGLPopGroupMarkerProc> fPopGroupMarker;
245        GLPtr<GrGLPushGroupMarkerProc> fPushGroupMarker;
246        GLPtr<GrGLQueryCounterProc> fQueryCounter;
247        GLPtr<GrGLRasterSamplesProc> fRasterSamples;
248        GLPtr<GrGLReadBufferProc> fReadBuffer;
249        GLPtr<GrGLReadPixelsProc> fReadPixels;
250        GLPtr<GrGLRenderbufferStorageProc> fRenderbufferStorage;
251
252        //  On OpenGL ES there are multiple incompatible extensions that add support for MSAA
253        //  and ES3 adds MSAA support to the standard. On an ES3 driver we may still use the
254        //  older extensions for performance reasons or due to ES3 driver bugs. We want the function
255        //  that creates the GrGLInterface to provide all available functions and internally
256        //  we will select among them. They all have a method called glRenderbufferStorageMultisample*.
257        //  So we have separate function pointers for GL_IMG/EXT_multisampled_to_texture,
258        //  GL_CHROMIUM/ANGLE_framebuffer_multisample/ES3, and GL_APPLE_framebuffer_multisample
259        //  variations.
260        //
261        //  If a driver supports multiple GL_ARB_framebuffer_multisample-style extensions then we will
262        //  assume the function pointers for the standard (or equivalent GL_ARB) version have
263        //  been preferred over GL_EXT, GL_CHROMIUM, or GL_ANGLE variations that have reduced
264        //  functionality.
265
266        //  GL_EXT_multisampled_render_to_texture (preferred) or GL_IMG_multisampled_render_to_texture
267        GLPtr<GrGLRenderbufferStorageMultisampleProc> fRenderbufferStorageMultisampleES2EXT;
268        //  GL_APPLE_framebuffer_multisample
269        GLPtr<GrGLRenderbufferStorageMultisampleProc> fRenderbufferStorageMultisampleES2APPLE;
270
271        //  This is used to store the pointer for GL_ARB/EXT/ANGLE/CHROMIUM_framebuffer_multisample or
272        //  the standard function in ES3+ or GL 3.0+.
273        GLPtr<GrGLRenderbufferStorageMultisampleProc> fRenderbufferStorageMultisample;
274
275        // Pointer to BindUniformLocationCHROMIUM from the GL_CHROMIUM_bind_uniform_location extension.
276        GLPtr<GrGLBindUniformLocation> fBindUniformLocation;
277
278        GLPtr<GrGLResolveMultisampleFramebufferProc> fResolveMultisampleFramebuffer;
279        GLPtr<GrGLScissorProc> fScissor;
280        GLPtr<GrGLShaderSourceProc> fShaderSource;
281        GLPtr<GrGLStencilFuncProc> fStencilFunc;
282        GLPtr<GrGLStencilFuncSeparateProc> fStencilFuncSeparate;
283        GLPtr<GrGLStencilMaskProc> fStencilMask;
284        GLPtr<GrGLStencilMaskSeparateProc> fStencilMaskSeparate;
285        GLPtr<GrGLStencilOpProc> fStencilOp;
286        GLPtr<GrGLStencilOpSeparateProc> fStencilOpSeparate;
287        GLPtr<GrGLTexImage2DProc> fTexImage2D;
288        GLPtr<GrGLTexParameteriProc> fTexParameteri;
289        GLPtr<GrGLTexParameterivProc> fTexParameteriv;
290        GLPtr<GrGLTexSubImage2DProc> fTexSubImage2D;
291        GLPtr<GrGLTexStorage2DProc> fTexStorage2D;
292        GLPtr<GrGLTextureBarrierProc> fTextureBarrier;
293        GLPtr<GrGLDiscardFramebufferProc> fDiscardFramebuffer;
294        GLPtr<GrGLUniform1fProc> fUniform1f;
295        GLPtr<GrGLUniform1iProc> fUniform1i;
296        GLPtr<GrGLUniform1fvProc> fUniform1fv;
297        GLPtr<GrGLUniform1ivProc> fUniform1iv;
298        GLPtr<GrGLUniform2fProc> fUniform2f;
299        GLPtr<GrGLUniform2iProc> fUniform2i;
300        GLPtr<GrGLUniform2fvProc> fUniform2fv;
301        GLPtr<GrGLUniform2ivProc> fUniform2iv;
302        GLPtr<GrGLUniform3fProc> fUniform3f;
303        GLPtr<GrGLUniform3iProc> fUniform3i;
304        GLPtr<GrGLUniform3fvProc> fUniform3fv;
305        GLPtr<GrGLUniform3ivProc> fUniform3iv;
306        GLPtr<GrGLUniform4fProc> fUniform4f;
307        GLPtr<GrGLUniform4iProc> fUniform4i;
308        GLPtr<GrGLUniform4fvProc> fUniform4fv;
309        GLPtr<GrGLUniform4ivProc> fUniform4iv;
310        GLPtr<GrGLUniformMatrix2fvProc> fUniformMatrix2fv;
311        GLPtr<GrGLUniformMatrix3fvProc> fUniformMatrix3fv;
312        GLPtr<GrGLUniformMatrix4fvProc> fUniformMatrix4fv;
313        GLPtr<GrGLUnmapBufferProc> fUnmapBuffer;
314        GLPtr<GrGLUnmapBufferSubDataProc> fUnmapBufferSubData;
315        GLPtr<GrGLUnmapTexSubImage2DProc> fUnmapTexSubImage2D;
316        GLPtr<GrGLUseProgramProc> fUseProgram;
317        GLPtr<GrGLVertexAttrib1fProc> fVertexAttrib1f;
318        GLPtr<GrGLVertexAttrib2fvProc> fVertexAttrib2fv;
319        GLPtr<GrGLVertexAttrib3fvProc> fVertexAttrib3fv;
320        GLPtr<GrGLVertexAttrib4fvProc> fVertexAttrib4fv;
321        GLPtr<GrGLVertexAttribPointerProc> fVertexAttribPointer;
322        GLPtr<GrGLViewportProc> fViewport;
323
324        /* GL_NV_path_rendering */
325        GLPtr<GrGLMatrixLoadfProc> fMatrixLoadf;
326        GLPtr<GrGLMatrixLoadIdentityProc> fMatrixLoadIdentity;
327        GLPtr<GrGLGetProgramResourceLocationProc> fGetProgramResourceLocation;
328        GLPtr<GrGLPathCommandsProc> fPathCommands;
329        GLPtr<GrGLPathCoordsProc> fPathCoords;
330        GLPtr<GrGLPathParameteriProc> fPathParameteri;
331        GLPtr<GrGLPathParameterfProc> fPathParameterf;
332        GLPtr<GrGLGenPathsProc> fGenPaths;
333        GLPtr<GrGLDeletePathsProc> fDeletePaths;
334        GLPtr<GrGLIsPathProc> fIsPath;
335        GLPtr<GrGLPathStencilFuncProc> fPathStencilFunc;
336        GLPtr<GrGLStencilFillPathProc> fStencilFillPath;
337        GLPtr<GrGLStencilStrokePathProc> fStencilStrokePath;
338        GLPtr<GrGLStencilFillPathInstancedProc> fStencilFillPathInstanced;
339        GLPtr<GrGLStencilStrokePathInstancedProc> fStencilStrokePathInstanced;
340        GLPtr<GrGLPathTexGenProc> fPathTexGen;
341        GLPtr<GrGLCoverFillPathProc> fCoverFillPath;
342        GLPtr<GrGLCoverStrokePathProc> fCoverStrokePath;
343        GLPtr<GrGLCoverFillPathInstancedProc> fCoverFillPathInstanced;
344        GLPtr<GrGLCoverStrokePathInstancedProc> fCoverStrokePathInstanced;
345        // NV_path_rendering v1.2
346        GLPtr<GrGLStencilThenCoverFillPathProc> fStencilThenCoverFillPath;
347        GLPtr<GrGLStencilThenCoverStrokePathProc> fStencilThenCoverStrokePath;
348        GLPtr<GrGLStencilThenCoverFillPathInstancedProc> fStencilThenCoverFillPathInstanced;
349        GLPtr<GrGLStencilThenCoverStrokePathInstancedProc> fStencilThenCoverStrokePathInstanced;
350        // NV_path_rendering v1.3
351        GLPtr<GrGLProgramPathFragmentInputGenProc> fProgramPathFragmentInputGen;
352        GLPtr<GrGLPathMemoryGlyphIndexArrayProc> fPathMemoryGlyphIndexArray;
353
354        /* NV_framebuffer_mixed_samples */
355        GLPtr<GrGLCoverageModulationProc> fCoverageModulation;
356
357        /* ARB_draw_instanced */
358        GLPtr<GrGLDrawArraysInstancedProc> fDrawArraysInstanced;
359        GLPtr<GrGLDrawElementsInstancedProc> fDrawElementsInstanced;
360
361        /* ARB_instanced_arrays */
362        GLPtr<GrGLVertexAttribDivisorProc> fVertexAttribDivisor;
363        // EXT_direct_state_access
364        GLPtr<GrGLVertexArrayVertexAttribDivisorProc> fVertexArrayVertexAttribDivisor;
365
366        /* NV_bindless_texture */
367        // We use the NVIDIA verson for now because it does not require dynamically uniform handles.
368        // We may switch the the ARB version and/or omit methods in the future.
369        GLPtr<GrGLGetTextureHandleProc> fGetTextureHandle;
370        GLPtr<GrGLGetTextureSamplerHandleProc> fGetTextureSamplerHandle;
371        GLPtr<GrGLMakeTextureHandleResidentProc> fMakeTextureHandleResident;
372        GLPtr<GrGLMakeTextureHandleNonResidentProc> fMakeTextureHandleNonResident;
373        GLPtr<GrGLGetImageHandleProc> fGetImageHandle;
374        GLPtr<GrGLMakeImageHandleResidentProc> fMakeImageHandleResident;
375        GLPtr<GrGLMakeImageHandleNonResidentProc> fMakeImageHandleNonResident;
376        GLPtr<GrGLIsTextureHandleResidentProc> fIsTextureHandleResident;
377        GLPtr<GrGLIsImageHandleResidentProc> fIsImageHandleResident;
378        GLPtr<GrGLUniformHandleui64Proc> fUniformHandleui64;
379        GLPtr<GrGLUniformHandleui64vProc> fUniformHandleui64v;
380        GLPtr<GrGLProgramUniformHandleui64Proc> fProgramUniformHandleui64;
381        GLPtr<GrGLProgramUniformHandleui64vProc> fProgramUniformHandleui64v;
382
383        /* EXT_direct_state_access */
384        // We use the EXT verson because it is more expansive and interacts with more extensions
385        // than the ARB or core (4.5) versions. We may switch and/or omit methods in the future.
386        GLPtr<GrGLTextureParameteriProc> fTextureParameteri;
387        GLPtr<GrGLTextureParameterivProc> fTextureParameteriv;
388        GLPtr<GrGLTextureParameterfProc> fTextureParameterf;
389        GLPtr<GrGLTextureParameterfvProc> fTextureParameterfv;
390        GLPtr<GrGLTextureImage1DProc> fTextureImage1D;
391        GLPtr<GrGLTextureImage2DProc> fTextureImage2D;
392        GLPtr<GrGLTextureSubImage1DProc> fTextureSubImage1D;
393        GLPtr<GrGLTextureSubImage2DProc> fTextureSubImage2D;
394        GLPtr<GrGLCopyTextureImage1DProc> fCopyTextureImage1D;
395        GLPtr<GrGLCopyTextureImage2DProc> fCopyTextureImage2D;
396        GLPtr<GrGLCopyTextureSubImage1DProc> fCopyTextureSubImage1D;
397        GLPtr<GrGLCopyTextureSubImage2DProc> fCopyTextureSubImage2D;
398        GLPtr<GrGLGetTextureImageProc> fGetTextureImage;
399        GLPtr<GrGLGetTextureParameterfvProc> fGetTextureParameterfv;
400        GLPtr<GrGLGetTextureParameterivProc> fGetTextureParameteriv;
401        GLPtr<GrGLGetTextureLevelParameterfvProc> fGetTextureLevelParameterfv;
402        GLPtr<GrGLGetTextureLevelParameterivProc> fGetTextureLevelParameteriv;
403        // OpenGL 1.2
404        GLPtr<GrGLTextureImage3DProc> fTextureImage3D;
405        GLPtr<GrGLTextureSubImage3DProc> fTextureSubImage3D;
406        GLPtr<GrGLCopyTextureSubImage3DProc> fCopyTextureSubImage3D;
407        GLPtr<GrGLCompressedTextureImage3DProc> fCompressedTextureImage3D;
408        GLPtr<GrGLCompressedTextureImage2DProc> fCompressedTextureImage2D;
409        GLPtr<GrGLCompressedTextureImage1DProc> fCompressedTextureImage1D;
410        GLPtr<GrGLCompressedTextureSubImage3DProc> fCompressedTextureSubImage3D;
411        GLPtr<GrGLCompressedTextureSubImage2DProc> fCompressedTextureSubImage2D;
412        GLPtr<GrGLCompressedTextureSubImage1DProc> fCompressedTextureSubImage1D;
413        GLPtr<GrGLGetCompressedTextureImageProc> fGetCompressedTextureImage;
414        // OpenGL 1.5
415        GLPtr<GrGLNamedBufferDataProc> fNamedBufferData;
416        GLPtr<GrGLNamedBufferSubDataProc> fNamedBufferSubData;
417        GLPtr<GrGLMapNamedBufferProc> fMapNamedBuffer;
418        GLPtr<GrGLUnmapNamedBufferProc> fUnmapNamedBuffer;
419        GLPtr<GrGLGetNamedBufferParameterivProc> fGetNamedBufferParameteriv;
420        GLPtr<GrGLGetNamedBufferPointervProc> fGetNamedBufferPointerv;
421        GLPtr<GrGLGetNamedBufferSubDataProc> fGetNamedBufferSubData;
422        // OpenGL 2.0
423        GLPtr<GrGLProgramUniform1fProc> fProgramUniform1f;
424        GLPtr<GrGLProgramUniform2fProc> fProgramUniform2f;
425        GLPtr<GrGLProgramUniform3fProc> fProgramUniform3f;
426        GLPtr<GrGLProgramUniform4fProc> fProgramUniform4f;
427        GLPtr<GrGLProgramUniform1iProc> fProgramUniform1i;
428        GLPtr<GrGLProgramUniform2iProc> fProgramUniform2i;
429        GLPtr<GrGLProgramUniform3iProc> fProgramUniform3i;
430        GLPtr<GrGLProgramUniform4iProc> fProgramUniform4i;
431        GLPtr<GrGLProgramUniform1fvProc> fProgramUniform1fv;
432        GLPtr<GrGLProgramUniform2fvProc> fProgramUniform2fv;
433        GLPtr<GrGLProgramUniform3fvProc> fProgramUniform3fv;
434        GLPtr<GrGLProgramUniform4fvProc> fProgramUniform4fv;
435        GLPtr<GrGLProgramUniform1ivProc> fProgramUniform1iv;
436        GLPtr<GrGLProgramUniform2ivProc> fProgramUniform2iv;
437        GLPtr<GrGLProgramUniform3ivProc> fProgramUniform3iv;
438        GLPtr<GrGLProgramUniform4ivProc> fProgramUniform4iv;
439        GLPtr<GrGLProgramUniformMatrix2fvProc> fProgramUniformMatrix2fv;
440        GLPtr<GrGLProgramUniformMatrix3fvProc> fProgramUniformMatrix3fv;
441        GLPtr<GrGLProgramUniformMatrix4fvProc> fProgramUniformMatrix4fv;
442        // OpenGL 2.1
443        GLPtr<GrGLProgramUniformMatrix2x3fvProc> fProgramUniformMatrix2x3fv;
444        GLPtr<GrGLProgramUniformMatrix3x2fvProc> fProgramUniformMatrix3x2fv;
445        GLPtr<GrGLProgramUniformMatrix2x4fvProc> fProgramUniformMatrix2x4fv;
446        GLPtr<GrGLProgramUniformMatrix4x2fvProc> fProgramUniformMatrix4x2fv;
447        GLPtr<GrGLProgramUniformMatrix3x4fvProc> fProgramUniformMatrix3x4fv;
448        GLPtr<GrGLProgramUniformMatrix4x3fvProc> fProgramUniformMatrix4x3fv;
449        // OpenGL 3.0
450        GLPtr<GrGLNamedRenderbufferStorageProc> fNamedRenderbufferStorage;
451        GLPtr<GrGLGetNamedRenderbufferParameterivProc> fGetNamedRenderbufferParameteriv;
452        GLPtr<GrGLNamedRenderbufferStorageMultisampleProc> fNamedRenderbufferStorageMultisample;
453        GLPtr<GrGLCheckNamedFramebufferStatusProc> fCheckNamedFramebufferStatus;
454        GLPtr<GrGLNamedFramebufferTexture1DProc> fNamedFramebufferTexture1D;
455        GLPtr<GrGLNamedFramebufferTexture2DProc> fNamedFramebufferTexture2D;
456        GLPtr<GrGLNamedFramebufferTexture3DProc> fNamedFramebufferTexture3D;
457        GLPtr<GrGLNamedFramebufferRenderbufferProc> fNamedFramebufferRenderbuffer;
458        GLPtr<GrGLGetNamedFramebufferAttachmentParameterivProc> fGetNamedFramebufferAttachmentParameteriv;
459        GLPtr<GrGLGenerateTextureMipmapProc> fGenerateTextureMipmap;
460        GLPtr<GrGLFramebufferDrawBufferProc> fFramebufferDrawBuffer;
461        GLPtr<GrGLFramebufferDrawBuffersProc> fFramebufferDrawBuffers;
462        GLPtr<GrGLFramebufferReadBufferProc> fFramebufferReadBuffer;
463        GLPtr<GrGLGetFramebufferParameterivProc> fGetFramebufferParameteriv;
464        GLPtr<GrGLNamedCopyBufferSubDataProc> fNamedCopyBufferSubData;
465        GLPtr<GrGLVertexArrayVertexOffsetProc> fVertexArrayVertexOffset;
466        GLPtr<GrGLVertexArrayColorOffsetProc> fVertexArrayColorOffset;
467        GLPtr<GrGLVertexArrayEdgeFlagOffsetProc> fVertexArrayEdgeFlagOffset;
468        GLPtr<GrGLVertexArrayIndexOffsetProc> fVertexArrayIndexOffset;
469        GLPtr<GrGLVertexArrayNormalOffsetProc> fVertexArrayNormalOffset;
470        GLPtr<GrGLVertexArrayTexCoordOffsetProc> fVertexArrayTexCoordOffset;
471        GLPtr<GrGLVertexArrayMultiTexCoordOffsetProc> fVertexArrayMultiTexCoordOffset;
472        GLPtr<GrGLVertexArrayFogCoordOffsetProc> fVertexArrayFogCoordOffset;
473        GLPtr<GrGLVertexArraySecondaryColorOffsetProc> fVertexArraySecondaryColorOffset;
474        GLPtr<GrGLVertexArrayVertexAttribOffsetProc> fVertexArrayVertexAttribOffset;
475        GLPtr<GrGLVertexArrayVertexAttribIOffsetProc> fVertexArrayVertexAttribIOffset;
476        GLPtr<GrGLEnableVertexArrayProc> fEnableVertexArray;
477        GLPtr<GrGLDisableVertexArrayProc> fDisableVertexArray;
478        GLPtr<GrGLEnableVertexArrayAttribProc> fEnableVertexArrayAttrib;
479        GLPtr<GrGLDisableVertexArrayAttribProc> fDisableVertexArrayAttrib;
480        GLPtr<GrGLGetVertexArrayIntegervProc> fGetVertexArrayIntegerv;
481        GLPtr<GrGLGetVertexArrayPointervProc> fGetVertexArrayPointerv;
482        GLPtr<GrGLGetVertexArrayIntegeri_vProc> fGetVertexArrayIntegeri_v;
483        GLPtr<GrGLGetVertexArrayPointeri_vProc> fGetVertexArrayPointeri_v;
484        GLPtr<GrGLMapNamedBufferRangeProc> fMapNamedBufferRange;
485        GLPtr<GrGLFlushMappedNamedBufferRangeProc> fFlushMappedNamedBufferRange;
486
487        /* KHR_debug */
488        GLPtr<GrGLDebugMessageControlProc> fDebugMessageControl;
489        GLPtr<GrGLDebugMessageInsertProc> fDebugMessageInsert;
490        GLPtr<GrGLDebugMessageCallbackProc> fDebugMessageCallback;
491        GLPtr<GrGLGetDebugMessageLogProc> fGetDebugMessageLog;
492        GLPtr<GrGLPushDebugGroupProc> fPushDebugGroup;
493        GLPtr<GrGLPopDebugGroupProc> fPopDebugGroup;
494        GLPtr<GrGLObjectLabelProc> fObjectLabel;
495    } fFunctions;
496
497    // Per-GL func callback
498#if GR_GL_PER_GL_FUNC_CALLBACK
499    GrGLInterfaceCallbackProc fCallback;
500    GrGLInterfaceCallbackData fCallbackData;
501#endif
502
503    // This exists for internal testing.
504    virtual void abandon() const {}
505};
506
507#endif
508