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      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 
     20 static 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 
    216 static 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 
    414 const 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