1// Modified from chromium/src/webkit/glue/gl_bindings_skia_cmd_buffer.cc
2
3// Copyright (c) 2011 The Chromium Authors. All rights reserved.
4// Use of this source code is governed by a BSD-style license that can be
5// found in the LICENSE file.
6
7#include "gl/GrGLExtensions.h"
8#include "gl/GrGLInterface.h"
9#include "gl/GrGLUtil.h"
10
11#ifndef GL_GLEXT_PROTOTYPES
12#define GL_GLEXT_PROTOTYPES
13#endif
14
15#include <GLES2/gl2.h>
16#include <GLES2/gl2ext.h>
17
18#include <EGL/egl.h>
19
20static const GrGLInterface* create_es_interface(GrGLVersion version,
21                                                const GrGLExtensions& extensions) {
22    if (version < GR_GL_VER(2,0)) {
23        return NULL;
24    }
25
26    GrGLInterface* interface = SkNEW(GrGLInterface);
27    interface->fBindingsExported = kES_GrGLBinding;
28
29    interface->fActiveTexture = glActiveTexture;
30    interface->fAttachShader = glAttachShader;
31    interface->fBindAttribLocation = glBindAttribLocation;
32    interface->fBindBuffer = glBindBuffer;
33    interface->fBindTexture = glBindTexture;
34    interface->fBindVertexArray = glBindVertexArrayOES;
35    interface->fBlendColor = glBlendColor;
36    interface->fBlendFunc = glBlendFunc;
37    interface->fBufferData = glBufferData;
38    interface->fBufferSubData = glBufferSubData;
39    interface->fClear = glClear;
40    interface->fClearColor = glClearColor;
41    interface->fClearStencil = glClearStencil;
42    interface->fColorMask = glColorMask;
43    interface->fCompileShader = glCompileShader;
44    interface->fCompressedTexImage2D = glCompressedTexImage2D;
45    interface->fCopyTexSubImage2D = glCopyTexSubImage2D;
46    interface->fCreateProgram = glCreateProgram;
47    interface->fCreateShader = glCreateShader;
48    interface->fCullFace = glCullFace;
49    interface->fDeleteBuffers = glDeleteBuffers;
50    interface->fDeleteProgram = glDeleteProgram;
51    interface->fDeleteShader = glDeleteShader;
52    interface->fDeleteTextures = glDeleteTextures;
53    interface->fDeleteVertexArrays = glDeleteVertexArraysOES;
54    interface->fDepthMask = glDepthMask;
55    interface->fDisable = glDisable;
56    interface->fDisableVertexAttribArray = glDisableVertexAttribArray;
57    interface->fDrawArrays = glDrawArrays;
58    interface->fDrawElements = glDrawElements;
59    interface->fEnable = glEnable;
60    interface->fEnableVertexAttribArray = glEnableVertexAttribArray;
61    interface->fFinish = glFinish;
62    interface->fFlush = glFlush;
63    interface->fFrontFace = glFrontFace;
64    interface->fGenBuffers = glGenBuffers;
65    interface->fGenerateMipmap = glGenerateMipmap;
66    interface->fGenTextures = glGenTextures;
67    interface->fGenVertexArrays = glGenVertexArraysOES;
68    interface->fGetBufferParameteriv = glGetBufferParameteriv;
69    interface->fGetError = glGetError;
70    interface->fGetIntegerv = glGetIntegerv;
71    interface->fGetProgramInfoLog = glGetProgramInfoLog;
72    interface->fGetProgramiv = glGetProgramiv;
73    interface->fGetShaderInfoLog = glGetShaderInfoLog;
74    interface->fGetShaderiv = glGetShaderiv;
75    interface->fGetString = glGetString;
76#if GL_ES_VERSION_30
77    interface->fGetStringi = glGetStringi;
78#else
79    interface->fGetStringi = (GrGLGetStringiProc) eglGetProcAddress("glGetStringi");
80#endif
81    interface->fGetUniformLocation = glGetUniformLocation;
82    interface->fLineWidth = glLineWidth;
83    interface->fLinkProgram = glLinkProgram;
84    interface->fPixelStorei = glPixelStorei;
85    interface->fReadPixels = glReadPixels;
86    interface->fScissor = glScissor;
87#if GR_GL_USE_NEW_SHADER_SOURCE_SIGNATURE
88    interface->fShaderSource = (GrGLShaderSourceProc) glShaderSource;
89#else
90    interface->fShaderSource = glShaderSource;
91#endif
92    interface->fStencilFunc = glStencilFunc;
93    interface->fStencilFuncSeparate = glStencilFuncSeparate;
94    interface->fStencilMask = glStencilMask;
95    interface->fStencilMaskSeparate = glStencilMaskSeparate;
96    interface->fStencilOp = glStencilOp;
97    interface->fStencilOpSeparate = glStencilOpSeparate;
98    interface->fTexImage2D = glTexImage2D;
99    interface->fTexParameteri = glTexParameteri;
100    interface->fTexParameteriv = glTexParameteriv;
101    interface->fTexSubImage2D = glTexSubImage2D;
102
103    if (version >= GR_GL_VER(3,0)) {
104#if GL_ES_VERSION_3_0
105        interface->fTexStorage2D = glTexStorage2D;
106#else
107        interface->fTexStorage2D = (GrGLTexStorage2DProc) eglGetProcAddress("glTexStorage2D");
108#endif
109    } else {
110#if GL_EXT_texture_storage
111        interface->fTexStorage2D = glTexStorage2DEXT;
112#else
113        interface->fTexStorage2D = (GrGLTexStorage2DProc) eglGetProcAddress("glTexStorage2DEXT");
114#endif
115    }
116
117#if GL_EXT_discard_framebuffer
118    interface->fDiscardFramebuffer = glDiscardFramebufferEXT;
119#endif
120    interface->fUniform1f = glUniform1f;
121    interface->fUniform1i = glUniform1i;
122    interface->fUniform1fv = glUniform1fv;
123    interface->fUniform1iv = glUniform1iv;
124    interface->fUniform2f = glUniform2f;
125    interface->fUniform2i = glUniform2i;
126    interface->fUniform2fv = glUniform2fv;
127    interface->fUniform2iv = glUniform2iv;
128    interface->fUniform3f = glUniform3f;
129    interface->fUniform3i = glUniform3i;
130    interface->fUniform3fv = glUniform3fv;
131    interface->fUniform3iv = glUniform3iv;
132    interface->fUniform4f = glUniform4f;
133    interface->fUniform4i = glUniform4i;
134    interface->fUniform4fv = glUniform4fv;
135    interface->fUniform4iv = glUniform4iv;
136    interface->fUniformMatrix2fv = glUniformMatrix2fv;
137    interface->fUniformMatrix3fv = glUniformMatrix3fv;
138    interface->fUniformMatrix4fv = glUniformMatrix4fv;
139    interface->fUseProgram = glUseProgram;
140    interface->fVertexAttrib4fv = glVertexAttrib4fv;
141    interface->fVertexAttribPointer = glVertexAttribPointer;
142    interface->fViewport = glViewport;
143    interface->fBindFramebuffer = glBindFramebuffer;
144    interface->fBindRenderbuffer = glBindRenderbuffer;
145    interface->fCheckFramebufferStatus = glCheckFramebufferStatus;
146    interface->fDeleteFramebuffers = glDeleteFramebuffers;
147    interface->fDeleteRenderbuffers = glDeleteRenderbuffers;
148    interface->fFramebufferRenderbuffer = glFramebufferRenderbuffer;
149    interface->fFramebufferTexture2D = glFramebufferTexture2D;
150#if GR_GL_IGNORE_ES3_MSAA
151
152    if (extensions.has("GL_EXT_multisampled_render_to_texture")) {
153#if GL_EXT_multisampled_render_to_texture
154        interface->fFramebufferTexture2DMultisample = glFramebufferTexture2DMultisampleEXT;
155        interface->fRenderbufferStorageMultisample = glRenderbufferStorageMultisampleEXT;
156#else
157        interface->fFramebufferTexture2DMultisample = (GrGLFramebufferTexture2DMultisampleProc) eglGetProcAddress("glFramebufferTexture2DMultisampleEXT");
158        interface->fRenderbufferStorageMultisample = (GrGLRenderbufferStorageMultisampleProc) eglGetProcAddress("glRenderbufferStorageMultisampleEXT");
159#endif
160    } else if (extensions.has("GL_IMG_multisampled_render_to_texture")) {
161#if GL_IMG_multisampled_render_to_texture
162        interface->fFramebufferTexture2DMultisample = glFramebufferTexture2DMultisampleIMG;
163        interface->fRenderbufferStorageMultisample = glRenderbufferStorageMultisampleIMG;
164#else
165        interface->fFramebufferTexture2DMultisample = (GrGLFramebufferTexture2DMultisampleProc) eglGetProcAddress("glFramebufferTexture2DMultisampleIMG");
166        interface->fRenderbufferStorageMultisample = (GrGLRenderbufferStorageMultisampleProc) eglGetProcAddress("glRenderbufferStorageMultisampleIMG");
167#endif
168    }
169
170#else // GR_GL_IGNORE_ES3_MSAA
171
172        if (version >= GR_GL_VER(3,0)) {
173#if GL_ES_VERSION_3_0
174            interface->fRenderbufferStorageMultisample = glRenderbufferStorageMultisample;
175            interface->fBlitFramebuffer = glBlitFramebuffer;
176#else
177            interface->fRenderbufferStorageMultisample = (GrGLRenderbufferStorageMultisampleProc) eglGetProcAddress("glRenderbufferStorageMultisample");
178            interface->fBlitFramebuffer = (GrGLBlitFramebufferProc) eglGetProcAddress("glBlitFramebuffer");
179#endif
180        }
181        if (extensions.has("GL_EXT_multisampled_render_to_texture")) {
182#if GL_EXT_multisampled_render_to_texture
183            interface->fFramebufferTexture2DMultisample = glFramebufferTexture2DMultisampleEXT;
184            interface->fRenderbufferStorageMultisampleES2EXT = glRenderbufferStorageMultisampleEXT;
185#else
186            interface->fFramebufferTexture2DMultisample = (GrGLFramebufferTexture2DMultisampleProc) eglGetProcAddress("glFramebufferTexture2DMultisampleEXT");
187            interface->fRenderbufferStorageMultisampleES2EXT = (GrGLRenderbufferStorageMultisampleProc) eglGetProcAddress("glRenderbufferStorageMultisampleEXT");
188#endif
189        } else if (extensions.has("GL_IMG_multisampled_render_to_texture")) {
190#if GL_IMG_multisampled_render_to_texture
191            interface->fFramebufferTexture2DMultisample = glFramebufferTexture2DMultisampleIMG;
192            interface->fRenderbufferStorageMultisampleES2EXT = glRenderbufferStorageMultisampleIMG;
193#else
194            interface->fFramebufferTexture2DMultisample = (GrGLFramebufferTexture2DMultisampleProc) eglGetProcAddress("glFramebufferTexture2DMultisampleIMG");
195            interface->fRenderbufferStorageMultisampleES2EXT = (GrGLRenderbufferStorageMultisampleProc) eglGetProcAddress("glRenderbufferStorageMultisampleIMG");
196#endif
197        }
198
199#endif // GR_GL_IGNORE_ES3_MSAA
200    interface->fGenFramebuffers = glGenFramebuffers;
201    interface->fGenRenderbuffers = glGenRenderbuffers;
202    interface->fGetFramebufferAttachmentParameteriv = glGetFramebufferAttachmentParameteriv;
203    interface->fGetRenderbufferParameteriv = glGetRenderbufferParameteriv;
204    interface->fRenderbufferStorage = glRenderbufferStorage;
205#if GL_OES_mapbuffer
206    interface->fMapBuffer = glMapBufferOES;
207    interface->fUnmapBuffer = glUnmapBufferOES;
208#else
209    interface->fMapBuffer = (GrGLMapBufferProc) eglGetProcAddress("glMapBufferOES");
210    interface->fUnmapBuffer = (GrGLUnmapBufferProc) eglGetProcAddress("glUnmapBufferOES");
211#endif
212
213    return interface;
214}
215
216static const GrGLInterface* create_desktop_interface(GrGLVersion version,
217                                                     const GrGLExtensions& extensions) {
218    // Currently this assumes a 4.4 context or later. Supporting lower GL versions would require
219    // getting suffixed versions of pointers for supported extensions.
220    if (version < GR_GL_VER(4,4)) {
221        return NULL;
222    }
223
224    GrGLInterface* interface = SkNEW(GrGLInterface);
225    interface->fBindingsExported = kDesktop_GrGLBinding;
226
227    interface->fActiveTexture = (GrGLActiveTextureProc) eglGetProcAddress("glActiveTexture");
228    interface->fAttachShader = (GrGLAttachShaderProc) eglGetProcAddress("glAttachShader");
229    interface->fBeginQuery = (GrGLBeginQueryProc) eglGetProcAddress("glBeginQuery");
230    interface->fBindAttribLocation = (GrGLBindAttribLocationProc) eglGetProcAddress("glBindAttribLocation");
231    interface->fBindBuffer = (GrGLBindBufferProc) eglGetProcAddress("glBindBuffer");
232    interface->fBindFragDataLocation = (GrGLBindFragDataLocationProc) eglGetProcAddress("glBindFragDataLocation");
233    interface->fBindFragDataLocationIndexed = (GrGLBindFragDataLocationIndexedProc) eglGetProcAddress("glBindFragDataLocationIndexed");
234    interface->fBindFramebuffer = (GrGLBindFramebufferProc) eglGetProcAddress("glBindFramebuffer");
235    interface->fBindRenderbuffer = (GrGLBindRenderbufferProc) eglGetProcAddress("glBindRenderbuffer");
236    interface->fBindTexture = (GrGLBindTextureProc) eglGetProcAddress("glBindTexture");
237    interface->fBindVertexArray = (GrGLBindVertexArrayProc) eglGetProcAddress("glBindVertexArray");
238    interface->fBlendColor = (GrGLBlendColorProc) eglGetProcAddress("glBlendColor");
239    interface->fBlendFunc = (GrGLBlendFuncProc) eglGetProcAddress("glBlendFunc");
240    interface->fBlitFramebuffer = (GrGLBlitFramebufferProc) eglGetProcAddress("glBlitFramebuffer");
241    interface->fBufferData = (GrGLBufferDataProc) eglGetProcAddress("glBufferData");
242    interface->fBufferSubData = (GrGLBufferSubDataProc) eglGetProcAddress("glBufferSubData");
243    interface->fCheckFramebufferStatus = (GrGLCheckFramebufferStatusProc) eglGetProcAddress("glCheckFramebufferStatus");
244    interface->fClear = (GrGLClearProc) eglGetProcAddress("glClear");
245    interface->fClearColor = (GrGLClearColorProc) eglGetProcAddress("glClearColor");
246    interface->fClearStencil = (GrGLClearStencilProc) eglGetProcAddress("glClearStencil");
247    interface->fClientActiveTexture = (GrGLClientActiveTextureProc) eglGetProcAddress("glClientActiveTexture");
248    interface->fColorMask = (GrGLColorMaskProc) eglGetProcAddress("glColorMask");
249    interface->fCompileShader = (GrGLCompileShaderProc) eglGetProcAddress("glCompileShader");
250    interface->fCompressedTexImage2D = (GrGLCompressedTexImage2DProc) eglGetProcAddress("glCompressedTexImage2D");
251    interface->fCopyTexSubImage2D = (GrGLCopyTexSubImage2DProc) eglGetProcAddress("glCopyTexSubImage2D");
252    interface->fCreateProgram = (GrGLCreateProgramProc) eglGetProcAddress("glCreateProgram");
253    interface->fCreateShader = (GrGLCreateShaderProc) eglGetProcAddress("glCreateShader");
254    interface->fCullFace = (GrGLCullFaceProc) eglGetProcAddress("glCullFace");
255    interface->fDeleteBuffers = (GrGLDeleteBuffersProc) eglGetProcAddress("glDeleteBuffers");
256    interface->fDeleteFramebuffers = (GrGLDeleteFramebuffersProc) eglGetProcAddress("glDeleteFramebuffers");
257    interface->fDeleteProgram = (GrGLDeleteProgramProc) eglGetProcAddress("glDeleteProgram");
258    interface->fDeleteQueries = (GrGLDeleteQueriesProc) eglGetProcAddress("glDeleteQueries");
259    interface->fDeleteRenderbuffers = (GrGLDeleteRenderbuffersProc) eglGetProcAddress("glDeleteRenderbuffers");
260    interface->fDeleteShader = (GrGLDeleteShaderProc) eglGetProcAddress("glDeleteShader");
261    interface->fDeleteTextures = (GrGLDeleteTexturesProc) eglGetProcAddress("glDeleteTextures");
262    interface->fDeleteVertexArrays = (GrGLDeleteVertexArraysProc) eglGetProcAddress("glDeleteVertexArrays");
263    interface->fDepthMask = (GrGLDepthMaskProc) eglGetProcAddress("glDepthMask");
264    interface->fDisable = (GrGLDisableProc) eglGetProcAddress("glDisable");
265    interface->fDisableClientState = (GrGLDisableClientStateProc) eglGetProcAddress("glDisableClientState");
266    interface->fDisableVertexAttribArray = (GrGLDisableVertexAttribArrayProc) eglGetProcAddress("glDisableVertexAttribArray");
267    interface->fDrawArrays = (GrGLDrawArraysProc) eglGetProcAddress("glDrawArrays");
268    interface->fDrawBuffer = (GrGLDrawBufferProc) eglGetProcAddress("glDrawBuffer");
269    interface->fDrawBuffers = (GrGLDrawBuffersProc) eglGetProcAddress("glDrawBuffers");
270    interface->fDrawElements = (GrGLDrawElementsProc) eglGetProcAddress("glDrawElements");
271    interface->fEnable = (GrGLEnableProc) eglGetProcAddress("glEnable");
272    interface->fEnableClientState = (GrGLEnableClientStateProc) eglGetProcAddress("glEnableClientState");
273    interface->fEnableVertexAttribArray = (GrGLEnableVertexAttribArrayProc) eglGetProcAddress("glEnableVertexAttribArray");
274    interface->fEndQuery = (GrGLEndQueryProc) eglGetProcAddress("glEndQuery");
275    interface->fFinish = (GrGLFinishProc) eglGetProcAddress("glFinish");
276    interface->fFlush = (GrGLFlushProc) eglGetProcAddress("glFlush");
277    interface->fFramebufferRenderbuffer = (GrGLFramebufferRenderbufferProc) eglGetProcAddress("glFramebufferRenderbuffer");
278    interface->fFramebufferTexture2D = (GrGLFramebufferTexture2DProc) eglGetProcAddress("glFramebufferTexture2D");
279    interface->fFrontFace = (GrGLFrontFaceProc) eglGetProcAddress("glFrontFace");
280    interface->fGenBuffers = (GrGLGenBuffersProc) eglGetProcAddress("glGenBuffers");
281    interface->fGenFramebuffers = (GrGLGenFramebuffersProc) eglGetProcAddress("glGenFramebuffers");
282    interface->fGenerateMipmap = (GrGLGenerateMipmapProc) eglGetProcAddress("glGenerateMipmap");
283    interface->fGenQueries = (GrGLGenQueriesProc) eglGetProcAddress("glGenQueries");
284    interface->fGenRenderbuffers = (GrGLGenRenderbuffersProc) eglGetProcAddress("glGenRenderbuffers");
285    interface->fGenTextures = (GrGLGenTexturesProc) eglGetProcAddress("glGenTextures");
286    interface->fGenVertexArrays = (GrGLGenVertexArraysProc) eglGetProcAddress("glGenVertexArrays");
287    interface->fGetBufferParameteriv = (GrGLGetBufferParameterivProc) eglGetProcAddress("glGetBufferParameteriv");
288    interface->fGetError = (GrGLGetErrorProc) eglGetProcAddress("glGetError");
289    interface->fGetFramebufferAttachmentParameteriv = (GrGLGetFramebufferAttachmentParameterivProc) eglGetProcAddress("glGetFramebufferAttachmentParameteriv");
290    interface->fGetIntegerv = (GrGLGetIntegervProc) eglGetProcAddress("glGetIntegerv");
291    interface->fGetQueryObjecti64v = (GrGLGetQueryObjecti64vProc) eglGetProcAddress("glGetQueryObjecti64v");
292    interface->fGetQueryObjectiv = (GrGLGetQueryObjectivProc) eglGetProcAddress("glGetQueryObjectiv");
293    interface->fGetQueryObjectui64v = (GrGLGetQueryObjectui64vProc) eglGetProcAddress("glGetQueryObjectui64v");
294    interface->fGetQueryObjectuiv = (GrGLGetQueryObjectuivProc) eglGetProcAddress("glGetQueryObjectuiv");
295    interface->fGetQueryiv = (GrGLGetQueryivProc) eglGetProcAddress("glGetQueryiv");
296    interface->fGetProgramInfoLog = (GrGLGetProgramInfoLogProc) eglGetProcAddress("glGetProgramInfoLog");
297    interface->fGetProgramiv = (GrGLGetProgramivProc) eglGetProcAddress("glGetProgramiv");
298    interface->fGetRenderbufferParameteriv = (GrGLGetRenderbufferParameterivProc) eglGetProcAddress("glGetRenderbufferParameteriv");
299    interface->fGetShaderInfoLog = (GrGLGetShaderInfoLogProc) eglGetProcAddress("glGetShaderInfoLog");
300    interface->fGetShaderiv = (GrGLGetShaderivProc) eglGetProcAddress("glGetShaderiv");
301    interface->fGetString = (GrGLGetStringProc) eglGetProcAddress("glGetString");
302    interface->fGetStringi = (GrGLGetStringiProc) eglGetProcAddress("glGetStringi");
303    interface->fGetTexLevelParameteriv = (GrGLGetTexLevelParameterivProc) eglGetProcAddress("glGetTexLevelParameteriv");
304    interface->fGetUniformLocation = (GrGLGetUniformLocationProc) eglGetProcAddress("glGetUniformLocation");
305    interface->fLineWidth = (GrGLLineWidthProc) eglGetProcAddress("glLineWidth");
306    interface->fLinkProgram = (GrGLLinkProgramProc) eglGetProcAddress("glLinkProgram");
307    interface->fLoadIdentity = (GrGLLoadIdentityProc) eglGetProcAddress("glLoadIdentity");
308    interface->fLoadMatrixf = (GrGLLoadMatrixfProc) eglGetProcAddress("glLoadMatrixf");
309    interface->fMapBuffer = (GrGLMapBufferProc) eglGetProcAddress("glMapBuffer");
310    interface->fMatrixMode = (GrGLMatrixModeProc) eglGetProcAddress("glMatrixMode");
311    interface->fPixelStorei = (GrGLPixelStoreiProc) eglGetProcAddress("glPixelStorei");
312    interface->fQueryCounter = (GrGLQueryCounterProc) eglGetProcAddress("glQueryCounter");
313    interface->fReadBuffer = (GrGLReadBufferProc) eglGetProcAddress("glReadBuffer");
314    interface->fReadPixels = (GrGLReadPixelsProc) eglGetProcAddress("glReadPixels");
315    interface->fRenderbufferStorage = (GrGLRenderbufferStorageProc) eglGetProcAddress("glRenderbufferStorage");
316    interface->fRenderbufferStorageMultisample = (GrGLRenderbufferStorageMultisampleProc) eglGetProcAddress("glRenderbufferStorageMultisample");
317    interface->fScissor = (GrGLScissorProc) eglGetProcAddress("glScissor");
318    interface->fShaderSource = (GrGLShaderSourceProc) eglGetProcAddress("glShaderSource");
319    interface->fStencilFunc = (GrGLStencilFuncProc) eglGetProcAddress("glStencilFunc");
320    interface->fStencilFuncSeparate = (GrGLStencilFuncSeparateProc) eglGetProcAddress("glStencilFuncSeparate");
321    interface->fStencilMask = (GrGLStencilMaskProc) eglGetProcAddress("glStencilMask");
322    interface->fStencilMaskSeparate = (GrGLStencilMaskSeparateProc) eglGetProcAddress("glStencilMaskSeparate");
323    interface->fStencilOp = (GrGLStencilOpProc) eglGetProcAddress("glStencilOp");
324    interface->fStencilOpSeparate = (GrGLStencilOpSeparateProc) eglGetProcAddress("glStencilOpSeparate");
325    interface->fTexGenf = (GrGLTexGenfProc) eglGetProcAddress("glTexGenf");
326    interface->fTexGenfv = (GrGLTexGenfvProc) eglGetProcAddress("glTexGenfv");
327    interface->fTexGeni = (GrGLTexGeniProc) eglGetProcAddress("glTexGeni");
328    interface->fTexImage2D = (GrGLTexImage2DProc) eglGetProcAddress("glTexImage2D");
329    interface->fTexParameteri = (GrGLTexParameteriProc) eglGetProcAddress("glTexParameteri");
330    interface->fTexParameteriv = (GrGLTexParameterivProc) eglGetProcAddress("glTexParameteriv");
331    interface->fTexSubImage2D = (GrGLTexSubImage2DProc) eglGetProcAddress("glTexSubImage2D");
332    interface->fTexStorage2D = (GrGLTexStorage2DProc) eglGetProcAddress("glTexStorage2D");
333    interface->fUniform1f = (GrGLUniform1fProc) eglGetProcAddress("glUniform1f");
334    interface->fUniform1i = (GrGLUniform1iProc) eglGetProcAddress("glUniform1i");
335    interface->fUniform1fv = (GrGLUniform1fvProc) eglGetProcAddress("glUniform1fv");
336    interface->fUniform1iv = (GrGLUniform1ivProc) eglGetProcAddress("glUniform1iv");
337    interface->fUniform2f = (GrGLUniform2fProc) eglGetProcAddress("glUniform2f");
338    interface->fUniform2i = (GrGLUniform2iProc) eglGetProcAddress("glUniform2i");
339    interface->fUniform2fv = (GrGLUniform2fvProc) eglGetProcAddress("glUniform2fv");
340    interface->fUniform2iv = (GrGLUniform2ivProc) eglGetProcAddress("glUniform2iv");
341    interface->fUniform3f = (GrGLUniform3fProc) eglGetProcAddress("glUniform3f");
342    interface->fUniform3i = (GrGLUniform3iProc) eglGetProcAddress("glUniform3i");
343    interface->fUniform3fv = (GrGLUniform3fvProc) eglGetProcAddress("glUniform3fv");
344    interface->fUniform3iv = (GrGLUniform3ivProc) eglGetProcAddress("glUniform3iv");
345    interface->fUniform4f = (GrGLUniform4fProc) eglGetProcAddress("glUniform4f");
346    interface->fUniform4i = (GrGLUniform4iProc) eglGetProcAddress("glUniform4i");
347    interface->fUniform4fv = (GrGLUniform4fvProc) eglGetProcAddress("glUniform4fv");
348    interface->fUniform4iv = (GrGLUniform4ivProc) eglGetProcAddress("glUniform4iv");
349    interface->fUniformMatrix2fv = (GrGLUniformMatrix2fvProc) eglGetProcAddress("glUniformMatrix2fv");
350    interface->fUniformMatrix3fv = (GrGLUniformMatrix3fvProc) eglGetProcAddress("glUniformMatrix3fv");
351    interface->fUniformMatrix4fv = (GrGLUniformMatrix4fvProc) eglGetProcAddress("glUniformMatrix4fv");
352    interface->fUnmapBuffer = (GrGLUnmapBufferProc) eglGetProcAddress("glUnmapBuffer");
353    interface->fUseProgram = (GrGLUseProgramProc) eglGetProcAddress("glUseProgram");
354    interface->fVertexAttrib4fv = (GrGLVertexAttrib4fvProc) eglGetProcAddress("glVertexAttrib4fv");
355    interface->fVertexAttribPointer = (GrGLVertexAttribPointerProc) eglGetProcAddress("glVertexAttribPointer");
356    interface->fVertexPointer = (GrGLVertexPointerProc) eglGetProcAddress("glVertexPointer");
357    interface->fViewport = (GrGLViewportProc) eglGetProcAddress("glViewport");
358
359    if (extensions.has("GL_NV_path_rendering")) {
360        interface->fPathCommands = (GrGLPathCommandsProc) eglGetProcAddress("glPathCommandsNV");
361        interface->fPathCoords = (GrGLPathCoordsProc) eglGetProcAddress("glPathCoordsNV");
362        interface->fPathSubCommands = (GrGLPathSubCommandsProc) eglGetProcAddress("glPathSubCommandsNV");
363        interface->fPathSubCoords = (GrGLPathSubCoordsProc) eglGetProcAddress("glPathSubCoordsNV");
364        interface->fPathString = (GrGLPathStringProc) eglGetProcAddress("glPathStringNV");
365        interface->fPathGlyphs = (GrGLPathGlyphsProc) eglGetProcAddress("glPathGlyphsNV");
366        interface->fPathGlyphRange = (GrGLPathGlyphRangeProc) eglGetProcAddress("glPathGlyphRangeNV");
367        interface->fWeightPaths = (GrGLWeightPathsProc) eglGetProcAddress("glWeightPathsNV");
368        interface->fCopyPath = (GrGLCopyPathProc) eglGetProcAddress("glCopyPathNV");
369        interface->fInterpolatePaths = (GrGLInterpolatePathsProc) eglGetProcAddress("glInterpolatePathsNV");
370        interface->fTransformPath = (GrGLTransformPathProc) eglGetProcAddress("glTransformPathNV");
371        interface->fPathParameteriv = (GrGLPathParameterivProc) eglGetProcAddress("glPathParameterivNV");
372        interface->fPathParameteri = (GrGLPathParameteriProc) eglGetProcAddress("glPathParameteriNV");
373        interface->fPathParameterfv = (GrGLPathParameterfvProc) eglGetProcAddress("glPathParameterfvNV");
374        interface->fPathParameterf = (GrGLPathParameterfProc) eglGetProcAddress("glPathParameterfNV");
375        interface->fPathDashArray = (GrGLPathDashArrayProc) eglGetProcAddress("glPathDashArrayNV");
376        interface->fGenPaths = (GrGLGenPathsProc) eglGetProcAddress("glGenPathsNV");
377        interface->fDeletePaths = (GrGLDeletePathsProc) eglGetProcAddress("glDeletePathsNV");
378        interface->fIsPath = (GrGLIsPathProc) eglGetProcAddress("glIsPathNV");
379        interface->fPathStencilFunc = (GrGLPathStencilFuncProc) eglGetProcAddress("glPathStencilFuncNV");
380        interface->fPathStencilDepthOffset = (GrGLPathStencilDepthOffsetProc) eglGetProcAddress("glPathStencilDepthOffsetNV");
381        interface->fStencilFillPath = (GrGLStencilFillPathProc) eglGetProcAddress("glStencilFillPathNV");
382        interface->fStencilStrokePath = (GrGLStencilStrokePathProc) eglGetProcAddress("glStencilStrokePathNV");
383        interface->fStencilFillPathInstanced = (GrGLStencilFillPathInstancedProc) eglGetProcAddress("glStencilFillPathInstancedNV");
384        interface->fStencilStrokePathInstanced = (GrGLStencilStrokePathInstancedProc) eglGetProcAddress("glStencilStrokePathInstancedNV");
385        interface->fPathCoverDepthFunc = (GrGLPathCoverDepthFuncProc) eglGetProcAddress("glPathCoverDepthFuncNV");
386        interface->fPathColorGen = (GrGLPathColorGenProc) eglGetProcAddress("glPathColorGenNV");
387        interface->fPathTexGen = (GrGLPathTexGenProc) eglGetProcAddress("glPathTexGenNV");
388        interface->fPathFogGen = (GrGLPathFogGenProc) eglGetProcAddress("glPathFogGenNV");
389        interface->fCoverFillPath = (GrGLCoverFillPathProc) eglGetProcAddress("glCoverFillPathNV");
390        interface->fCoverStrokePath = (GrGLCoverStrokePathProc) eglGetProcAddress("glCoverStrokePathNV");
391        interface->fCoverFillPathInstanced = (GrGLCoverFillPathInstancedProc) eglGetProcAddress("glCoverFillPathInstancedNV");
392        interface->fCoverStrokePathInstanced = (GrGLCoverStrokePathInstancedProc) eglGetProcAddress("glCoverStrokePathInstancedNV");
393        interface->fGetPathParameteriv = (GrGLGetPathParameterivProc) eglGetProcAddress("glGetPathParameterivNV");
394        interface->fGetPathParameterfv = (GrGLGetPathParameterfvProc) eglGetProcAddress("glGetPathParameterfvNV");
395        interface->fGetPathCommands = (GrGLGetPathCommandsProc) eglGetProcAddress("glGetPathCommandsNV");
396        interface->fGetPathCoords = (GrGLGetPathCoordsProc) eglGetProcAddress("glGetPathCoordsNV");
397        interface->fGetPathDashArray = (GrGLGetPathDashArrayProc) eglGetProcAddress("glGetPathDashArrayNV");
398        interface->fGetPathMetrics = (GrGLGetPathMetricsProc) eglGetProcAddress("glGetPathMetricsNV");
399        interface->fGetPathMetricRange = (GrGLGetPathMetricRangeProc) eglGetProcAddress("glGetPathMetricRangeNV");
400        interface->fGetPathSpacing = (GrGLGetPathSpacingProc) eglGetProcAddress("glGetPathSpacingNV");
401        interface->fGetPathColorGeniv = (GrGLGetPathColorGenivProc) eglGetProcAddress("glGetPathColorGenivNV");
402        interface->fGetPathColorGenfv = (GrGLGetPathColorGenfvProc) eglGetProcAddress("glGetPathColorGenfvNV");
403        interface->fGetPathTexGeniv = (GrGLGetPathTexGenivProc) eglGetProcAddress("glGetPathTexGenivNV");
404        interface->fGetPathTexGenfv = (GrGLGetPathTexGenfvProc) eglGetProcAddress("glGetPathTexGenfvNV");
405        interface->fIsPointInFillPath = (GrGLIsPointInFillPathProc) eglGetProcAddress("glIsPointInFillPathNV");
406        interface->fIsPointInStrokePath = (GrGLIsPointInStrokePathProc) eglGetProcAddress("glIsPointInStrokePathNV");
407        interface->fGetPathLength = (GrGLGetPathLengthProc) eglGetProcAddress("glGetPathLengthNV");
408        interface->fPointAlongPath = (GrGLPointAlongPathProc) eglGetProcAddress("glPointAlongPathNV");
409    }
410
411    return interface;
412}
413
414const GrGLInterface* GrGLCreateNativeInterface() {
415
416    GrGLGetStringiProc getStringi = (GrGLGetStringiProc) eglGetProcAddress("glGetStringi");
417
418    const char* verStr = reinterpret_cast<const char*>(glGetString(GR_GL_VERSION));
419    GrGLVersion version = GrGLGetVersionFromString(verStr);
420    GrGLBinding binding = GrGLGetBindingInUseFromString(verStr);
421
422    GrGLExtensions extensions;
423    if (!extensions.init(binding, glGetString, getStringi, glGetIntegerv)) {
424        return NULL;
425    }
426
427    if (kES_GrGLBinding == binding) {
428        return create_es_interface(version, extensions);
429    } else if (kDesktop_GrGLBinding == binding) {
430        return create_desktop_interface(version, extensions);
431    } else {
432        return NULL;
433    }
434}
435