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      1 
      2 /*
      3  * Copyright 2012 Google Inc.
      4  *
      5  * Use of this source code is governed by a BSD-style license that can be
      6  * found in the LICENSE file.
      7  */
      8 
      9 #ifndef GrGLFunctions_DEFINED
     10 #define GrGLFunctions_DEFINED
     11 
     12 #include <functional>
     13 #include "GrGLTypes.h"
     14 #include "../private/SkTLogic.h"
     15 
     16 extern "C" {
     17 
     18 ///////////////////////////////////////////////////////////////////////////////
     19 
     20 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLActiveTextureProc)(GrGLenum texture);
     21 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLAttachShaderProc)(GrGLuint program, GrGLuint shader);
     22 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLBeginQueryProc)(GrGLenum target, GrGLuint id);
     23 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLBindAttribLocationProc)(GrGLuint program, GrGLuint index, const char* name);
     24 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLBindBufferProc)(GrGLenum target, GrGLuint buffer);
     25 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLBindFramebufferProc)(GrGLenum target, GrGLuint framebuffer);
     26 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLBindRenderbufferProc)(GrGLenum target, GrGLuint renderbuffer);
     27 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLBindImageTextureProc)(GrGLuint unit, GrGLuint texture, GrGLint level, GrGLboolean layered, GrGLint layer, GrGLenum access, GrGLenum format);
     28 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLBindTextureProc)(GrGLenum target, GrGLuint texture);
     29 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLBindFragDataLocationProc)(GrGLuint program, GrGLuint colorNumber, const GrGLchar* name);
     30 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLBindFragDataLocationIndexedProc)(GrGLuint program, GrGLuint colorNumber, GrGLuint index, const GrGLchar * name);
     31 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLBindVertexArrayProc)(GrGLuint array);
     32 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLBlendBarrierProc)();
     33 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLBlendColorProc)(GrGLclampf red, GrGLclampf green, GrGLclampf blue, GrGLclampf alpha);
     34 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLBlendEquationProc)(GrGLenum mode);
     35 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLBlendFuncProc)(GrGLenum sfactor, GrGLenum dfactor);
     36 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLBlitFramebufferProc)(GrGLint srcX0, GrGLint srcY0, GrGLint srcX1, GrGLint srcY1, GrGLint dstX0, GrGLint dstY0, GrGLint dstX1, GrGLint dstY1, GrGLbitfield mask, GrGLenum filter);
     37 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLBufferDataProc)(GrGLenum target, GrGLsizeiptr size, const GrGLvoid* data, GrGLenum usage);
     38 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLBufferSubDataProc)(GrGLenum target, GrGLintptr offset, GrGLsizeiptr size, const GrGLvoid* data);
     39 typedef GrGLenum (GR_GL_FUNCTION_TYPE* GrGLCheckFramebufferStatusProc)(GrGLenum target);
     40 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLClearProc)(GrGLbitfield mask);
     41 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLClearColorProc)(GrGLclampf red, GrGLclampf green, GrGLclampf blue, GrGLclampf alpha);
     42 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLClearStencilProc)(GrGLint s);
     43 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLClearTexImageProc)(GrGLuint texture, GrGLint level, GrGLenum format, GrGLenum type,const GrGLvoid * data);
     44 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLClearTexSubImageProc)(GrGLuint texture, GrGLint level, GrGLint xoffset, GrGLint yoffset, GrGLint zoffset, GrGLsizei width, GrGLsizei height, GrGLsizei depth, GrGLenum format, GrGLenum type,const GrGLvoid * data);
     45 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLColorMaskProc)(GrGLboolean red, GrGLboolean green, GrGLboolean blue, GrGLboolean alpha);
     46 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLCompileShaderProc)(GrGLuint shader);
     47 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLCompressedTexImage2DProc)(GrGLenum target, GrGLint level, GrGLenum internalformat, GrGLsizei width, GrGLsizei height, GrGLint border, GrGLsizei imageSize, const GrGLvoid* data);
     48 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLCompressedTexSubImage2DProc)(GrGLenum target, GrGLint level, GrGLint xoffset, GrGLint yoffset, GrGLsizei width, GrGLsizei height, GrGLenum format, GrGLsizei imageSize, const GrGLvoid* data);
     49 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLCopyTexSubImage2DProc)(GrGLenum target, GrGLint level, GrGLint xoffset, GrGLint yoffset, GrGLint x, GrGLint y, GrGLsizei width, GrGLsizei height);
     50 typedef GrGLuint (GR_GL_FUNCTION_TYPE* GrGLCreateProgramProc)();
     51 typedef GrGLuint (GR_GL_FUNCTION_TYPE* GrGLCreateShaderProc)(GrGLenum type);
     52 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLCullFaceProc)(GrGLenum mode);
     53 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLDeleteBuffersProc)(GrGLsizei n, const GrGLuint* buffers);
     54 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLDeleteFramebuffersProc)(GrGLsizei n, const GrGLuint *framebuffers);
     55 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLDeleteProgramProc)(GrGLuint program);
     56 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLDeleteQueriesProc)(GrGLsizei n, const GrGLuint *ids);
     57 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLDeleteRenderbuffersProc)(GrGLsizei n, const GrGLuint *renderbuffers);
     58 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLDeleteShaderProc)(GrGLuint shader);
     59 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLDeleteTexturesProc)(GrGLsizei n, const GrGLuint* textures);
     60 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLDeleteVertexArraysProc)(GrGLsizei n, const GrGLuint *arrays);
     61 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLDepthMaskProc)(GrGLboolean flag);
     62 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLDisableProc)(GrGLenum cap);
     63 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLDisableVertexAttribArrayProc)(GrGLuint index);
     64 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLDrawArraysProc)(GrGLenum mode, GrGLint first, GrGLsizei count);
     65 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLDrawArraysInstancedProc)(GrGLenum mode, GrGLint first, GrGLsizei count, GrGLsizei primcount);
     66 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLDrawArraysIndirectProc)(GrGLenum mode, const GrGLvoid* indirect);
     67 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLDrawBufferProc)(GrGLenum mode);
     68 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLDrawBuffersProc)(GrGLsizei n, const GrGLenum* bufs);
     69 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLDrawElementsProc)(GrGLenum mode, GrGLsizei count, GrGLenum type, const GrGLvoid* indices);
     70 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLDrawElementsInstancedProc)(GrGLenum mode, GrGLsizei count, GrGLenum type, const GrGLvoid *indices, GrGLsizei primcount);
     71 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLDrawElementsIndirectProc)(GrGLenum mode, GrGLenum type, const GrGLvoid* indirect);
     72 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLDrawRangeElementsProc)(GrGLenum mode, GrGLuint start, GrGLuint end, GrGLsizei count, GrGLenum type, const GrGLvoid* indices);
     73 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLEnableProc)(GrGLenum cap);
     74 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLEnableVertexAttribArrayProc)(GrGLuint index);
     75 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLEndQueryProc)(GrGLenum target);
     76 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLFinishProc)();
     77 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLFlushProc)();
     78 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLFlushMappedBufferRangeProc)(GrGLenum target, GrGLintptr offset, GrGLsizeiptr length);
     79 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLFramebufferRenderbufferProc)(GrGLenum target, GrGLenum attachment, GrGLenum renderbuffertarget, GrGLuint renderbuffer);
     80 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLFramebufferTexture2DProc)(GrGLenum target, GrGLenum attachment, GrGLenum textarget, GrGLuint texture, GrGLint level);
     81 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLFramebufferTexture2DMultisampleProc)(GrGLenum target, GrGLenum attachment, GrGLenum textarget, GrGLuint texture, GrGLint level, GrGLsizei samples);
     82 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLFrontFaceProc)(GrGLenum mode);
     83 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLGenBuffersProc)(GrGLsizei n, GrGLuint* buffers);
     84 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLGenFramebuffersProc)(GrGLsizei n, GrGLuint *framebuffers);
     85 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLGenerateMipmapProc)(GrGLenum target);
     86 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLGenQueriesProc)(GrGLsizei n, GrGLuint *ids);
     87 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLGenRenderbuffersProc)(GrGLsizei n, GrGLuint *renderbuffers);
     88 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLGenTexturesProc)(GrGLsizei n, GrGLuint* textures);
     89 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLGenVertexArraysProc)(GrGLsizei n, GrGLuint *arrays);
     90 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLGetBufferParameterivProc)(GrGLenum target, GrGLenum pname, GrGLint* params);
     91 typedef GrGLenum (GR_GL_FUNCTION_TYPE* GrGLGetErrorProc)();
     92 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLGetFramebufferAttachmentParameterivProc)(GrGLenum target, GrGLenum attachment, GrGLenum pname, GrGLint* params);
     93 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLGetIntegervProc)(GrGLenum pname, GrGLint* params);
     94 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLGetMultisamplefvProc)(GrGLenum pname, GrGLuint index, GrGLfloat* val);
     95 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLGetProgramInfoLogProc)(GrGLuint program, GrGLsizei bufsize, GrGLsizei* length, char* infolog);
     96 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLGetProgramivProc)(GrGLuint program, GrGLenum pname, GrGLint* params);
     97 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLGetQueryivProc)(GrGLenum GLtarget, GrGLenum pname, GrGLint *params);
     98 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLGetQueryObjecti64vProc)(GrGLuint id, GrGLenum pname, GrGLint64 *params);
     99 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLGetQueryObjectivProc)(GrGLuint id, GrGLenum pname, GrGLint *params);
    100 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLGetQueryObjectui64vProc)(GrGLuint id, GrGLenum pname, GrGLuint64 *params);
    101 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLGetQueryObjectuivProc)(GrGLuint id, GrGLenum pname, GrGLuint *params);
    102 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLGetRenderbufferParameterivProc)(GrGLenum target, GrGLenum pname, GrGLint* params);
    103 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLGetShaderInfoLogProc)(GrGLuint shader, GrGLsizei bufsize, GrGLsizei* length, char* infolog);
    104 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLGetShaderivProc)(GrGLuint shader, GrGLenum pname, GrGLint* params);
    105 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLGetShaderPrecisionFormatProc)(GrGLenum shadertype, GrGLenum precisiontype, GrGLint *range, GrGLint *precision);
    106 typedef const GrGLubyte* (GR_GL_FUNCTION_TYPE* GrGLGetStringProc)(GrGLenum name);
    107 typedef const GrGLubyte* (GR_GL_FUNCTION_TYPE* GrGLGetStringiProc)(GrGLenum name, GrGLuint index);
    108 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLGetTexLevelParameterivProc)(GrGLenum target, GrGLint level, GrGLenum pname, GrGLint* params);
    109 typedef GrGLint (GR_GL_FUNCTION_TYPE* GrGLGetUniformLocationProc)(GrGLuint program, const char* name);
    110 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLInsertEventMarkerProc)(GrGLsizei length, const char* marker);
    111 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLInvalidateBufferDataProc)(GrGLuint buffer);
    112 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLInvalidateBufferSubDataProc)(GrGLuint buffer, GrGLintptr offset, GrGLsizeiptr length);
    113 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLInvalidateFramebufferProc)(GrGLenum target, GrGLsizei numAttachments,  const GrGLenum *attachments);
    114 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLInvalidateSubFramebufferProc)(GrGLenum target, GrGLsizei numAttachments, const GrGLenum *attachments, GrGLint x, GrGLint y, GrGLsizei width, GrGLsizei height);
    115 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLInvalidateTexImageProc)(GrGLuint texture, GrGLint level);
    116 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLInvalidateTexSubImageProc)(GrGLuint texture, GrGLint level, GrGLint xoffset, GrGLint yoffset, GrGLint zoffset, GrGLsizei width, GrGLsizei height, GrGLsizei depth);
    117 typedef GrGLboolean (GR_GL_FUNCTION_TYPE* GrGLIsTextureProc)(GrGLuint texture);
    118 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLLineWidthProc)(GrGLfloat width);
    119 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLLinkProgramProc)(GrGLuint program);
    120 typedef GrGLvoid* (GR_GL_FUNCTION_TYPE* GrGLMapBufferProc)(GrGLenum target, GrGLenum access);
    121 typedef GrGLvoid* (GR_GL_FUNCTION_TYPE* GrGLMapBufferRangeProc)(GrGLenum target, GrGLintptr offset, GrGLsizeiptr length, GrGLbitfield access);
    122 typedef GrGLvoid* (GR_GL_FUNCTION_TYPE* GrGLMapBufferSubDataProc)(GrGLuint target, GrGLintptr offset, GrGLsizeiptr size, GrGLenum access);
    123 typedef GrGLvoid* (GR_GL_FUNCTION_TYPE* GrGLMapTexSubImage2DProc)(GrGLenum target, GrGLint level, GrGLint xoffset, GrGLint yoffset, GrGLsizei width, GrGLsizei height, GrGLenum format, GrGLenum type, GrGLenum access);
    124 typedef GrGLvoid* (GR_GL_FUNCTION_TYPE* GrGLMemoryBarrierProc)(GrGLbitfield barriers);
    125 typedef GrGLvoid* (GR_GL_FUNCTION_TYPE* GrGLMemoryBarrierByRegionProc)(GrGLbitfield barriers);
    126 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLPixelStoreiProc)(GrGLenum pname, GrGLint param);
    127 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLPolygonModeProc)(GrGLenum face, GrGLenum mode);
    128 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLPopGroupMarkerProc)();
    129 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLPushGroupMarkerProc)(GrGLsizei length, const char* marker);
    130 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLQueryCounterProc)(GrGLuint id, GrGLenum target);
    131 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLRasterSamplesProc)(GrGLuint samples, GrGLboolean fixedsamplelocations);
    132 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLReadBufferProc)(GrGLenum src);
    133 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLReadPixelsProc)(GrGLint x, GrGLint y, GrGLsizei width, GrGLsizei height, GrGLenum format, GrGLenum type, GrGLvoid* pixels);
    134 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLRenderbufferStorageProc)(GrGLenum target, GrGLenum internalformat, GrGLsizei width, GrGLsizei height);
    135 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLRenderbufferStorageMultisampleProc)(GrGLenum target, GrGLsizei samples, GrGLenum internalformat, GrGLsizei width, GrGLsizei height);
    136 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLResolveMultisampleFramebufferProc)();
    137 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLScissorProc)(GrGLint x, GrGLint y, GrGLsizei width, GrGLsizei height);
    138 // GL_CHROMIUM_bind_uniform_location
    139 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLBindUniformLocationProc)(GrGLuint program, GrGLint location, const char* name);
    140 
    141 #if GR_GL_USE_NEW_SHADER_SOURCE_SIGNATURE
    142 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLShaderSourceProc)(GrGLuint shader, GrGLsizei count, const char* const * str, const GrGLint* length);
    143 #else
    144 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLShaderSourceProc)(GrGLuint shader, GrGLsizei count, const char** str, const GrGLint* length);
    145 #endif
    146 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLStencilFuncProc)(GrGLenum func, GrGLint ref, GrGLuint mask);
    147 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLStencilFuncSeparateProc)(GrGLenum face, GrGLenum func, GrGLint ref, GrGLuint mask);
    148 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLStencilMaskProc)(GrGLuint mask);
    149 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLStencilMaskSeparateProc)(GrGLenum face, GrGLuint mask);
    150 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLStencilOpProc)(GrGLenum fail, GrGLenum zfail, GrGLenum zpass);
    151 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLStencilOpSeparateProc)(GrGLenum face, GrGLenum fail, GrGLenum zfail, GrGLenum zpass);
    152 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLTexBufferProc)(GrGLenum target, GrGLenum internalformat, GrGLuint buffer);
    153 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLTexBufferRangeProc)(GrGLenum target, GrGLenum internalformat, GrGLuint buffer, GrGLintptr offset, GrGLsizeiptr size);
    154 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLTexImage2DProc)(GrGLenum target, GrGLint level, GrGLint internalformat, GrGLsizei width, GrGLsizei height, GrGLint border, GrGLenum format, GrGLenum type, const GrGLvoid* pixels);
    155 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLTexParameteriProc)(GrGLenum target, GrGLenum pname, GrGLint param);
    156 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLTexParameterivProc)(GrGLenum target, GrGLenum pname, const GrGLint* params);
    157 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLTexStorage2DProc)(GrGLenum target, GrGLsizei levels, GrGLenum internalformat, GrGLsizei width, GrGLsizei height);
    158 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLDiscardFramebufferProc)(GrGLenum target, GrGLsizei numAttachments, const GrGLenum* attachments);
    159 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLTexSubImage2DProc)(GrGLenum target, GrGLint level, GrGLint xoffset, GrGLint yoffset, GrGLsizei width, GrGLsizei height, GrGLenum format, GrGLenum type, const GrGLvoid* pixels);
    160 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLTextureBarrierProc)();
    161 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLUniform1fProc)(GrGLint location, GrGLfloat v0);
    162 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLUniform1iProc)(GrGLint location, GrGLint v0);
    163 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLUniform1fvProc)(GrGLint location, GrGLsizei count, const GrGLfloat* v);
    164 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLUniform1ivProc)(GrGLint location, GrGLsizei count, const GrGLint* v);
    165 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLUniform2fProc)(GrGLint location, GrGLfloat v0, GrGLfloat v1);
    166 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLUniform2iProc)(GrGLint location, GrGLint v0, GrGLint v1);
    167 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLUniform2fvProc)(GrGLint location, GrGLsizei count, const GrGLfloat* v);
    168 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLUniform2ivProc)(GrGLint location, GrGLsizei count, const GrGLint* v);
    169 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLUniform3fProc)(GrGLint location, GrGLfloat v0, GrGLfloat v1, GrGLfloat v2);
    170 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLUniform3iProc)(GrGLint location, GrGLint v0, GrGLint v1, GrGLint v2);
    171 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLUniform3fvProc)(GrGLint location, GrGLsizei count, const GrGLfloat* v);
    172 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLUniform3ivProc)(GrGLint location, GrGLsizei count, const GrGLint* v);
    173 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLUniform4fProc)(GrGLint location, GrGLfloat v0, GrGLfloat v1, GrGLfloat v2, GrGLfloat v3);
    174 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLUniform4iProc)(GrGLint location, GrGLint v0, GrGLint v1, GrGLint v2, GrGLint v3);
    175 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLUniform4fvProc)(GrGLint location, GrGLsizei count, const GrGLfloat* v);
    176 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLUniform4ivProc)(GrGLint location, GrGLsizei count, const GrGLint* v);
    177 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLUniformMatrix2fvProc)(GrGLint location, GrGLsizei count, GrGLboolean transpose, const GrGLfloat* value);
    178 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLUniformMatrix3fvProc)(GrGLint location, GrGLsizei count, GrGLboolean transpose, const GrGLfloat* value);
    179 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLUniformMatrix4fvProc)(GrGLint location, GrGLsizei count, GrGLboolean transpose, const GrGLfloat* value);
    180 typedef GrGLboolean (GR_GL_FUNCTION_TYPE* GrGLUnmapBufferProc)(GrGLenum target);
    181 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLUnmapBufferSubDataProc)(const GrGLvoid* mem);
    182 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLUnmapTexSubImage2DProc)(const GrGLvoid* mem);
    183 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLUseProgramProc)(GrGLuint program);
    184 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLVertexAttrib1fProc)(GrGLuint indx, const GrGLfloat value);
    185 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLVertexAttrib2fvProc)(GrGLuint indx, const GrGLfloat* values);
    186 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLVertexAttrib3fvProc)(GrGLuint indx, const GrGLfloat* values);
    187 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLVertexAttrib4fvProc)(GrGLuint indx, const GrGLfloat* values);
    188 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLVertexAttribDivisorProc)(GrGLuint index, GrGLuint divisor);
    189 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLVertexAttribIPointerProc)(GrGLuint indx, GrGLint size, GrGLenum type, GrGLsizei stride, const GrGLvoid* ptr);
    190 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLVertexAttribPointerProc)(GrGLuint indx, GrGLint size, GrGLenum type, GrGLboolean normalized, GrGLsizei stride, const GrGLvoid* ptr);
    191 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLViewportProc)(GrGLint x, GrGLint y, GrGLsizei width, GrGLsizei height);
    192 
    193 /* GL_NV_path_rendering */
    194 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLMatrixLoadfProc)(GrGLenum matrixMode, const GrGLfloat* m);
    195 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLMatrixLoadIdentityProc)(GrGLenum);
    196 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLPathCommandsProc)(GrGLuint path, GrGLsizei numCommands, const GrGLubyte *commands, GrGLsizei numCoords, GrGLenum coordType, const GrGLvoid *coords);
    197 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLPathParameteriProc)(GrGLuint path, GrGLenum pname, GrGLint value);
    198 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLPathParameterfProc)(GrGLuint path, GrGLenum pname, GrGLfloat value);
    199 typedef GrGLuint (GR_GL_FUNCTION_TYPE* GrGLGenPathsProc)(GrGLsizei range);
    200 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLDeletePathsProc)(GrGLuint path, GrGLsizei range);
    201 typedef GrGLboolean (GR_GL_FUNCTION_TYPE* GrGLIsPathProc)(GrGLuint path);
    202 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLPathStencilFuncProc)(GrGLenum func, GrGLint ref, GrGLuint mask);
    203 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLStencilFillPathProc)(GrGLuint path, GrGLenum fillMode, GrGLuint mask);
    204 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLStencilStrokePathProc)(GrGLuint path, GrGLint reference, GrGLuint mask);
    205 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLStencilFillPathInstancedProc)(GrGLsizei numPaths, GrGLenum pathNameType, const GrGLvoid *paths, GrGLuint pathBase, GrGLenum fillMode, GrGLuint mask, GrGLenum transformType, const GrGLfloat *transformValues);
    206 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLStencilStrokePathInstancedProc)(GrGLsizei numPaths, GrGLenum pathNameType, const GrGLvoid *paths, GrGLuint pathBase, GrGLint reference, GrGLuint mask, GrGLenum transformType, const GrGLfloat *transformValues);
    207 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLCoverFillPathProc)(GrGLuint path, GrGLenum coverMode);
    208 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLCoverStrokePathProc)(GrGLuint name, GrGLenum coverMode);
    209 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLCoverFillPathInstancedProc)(GrGLsizei numPaths, GrGLenum pathNameType, const GrGLvoid *paths, GrGLuint pathBase, GrGLenum coverMode, GrGLenum transformType, const GrGLfloat *transformValues);
    210 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLCoverStrokePathInstancedProc)(GrGLsizei numPaths, GrGLenum pathNameType, const GrGLvoid *paths, GrGLuint pathBase, GrGLenum coverMode, GrGLenum transformType, const GrGLfloat* transformValues);
    211 // NV_path_rendering v1.2
    212 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLStencilThenCoverFillPathProc)(GrGLuint path, GrGLenum fillMode, GrGLuint mask, GrGLenum coverMode);
    213 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLStencilThenCoverStrokePathProc)(GrGLuint path, GrGLint reference, GrGLuint mask, GrGLenum coverMode);
    214 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLStencilThenCoverFillPathInstancedProc)(GrGLsizei numPaths, GrGLenum pathNameType, const GrGLvoid *paths, GrGLuint pathBase, GrGLenum fillMode, GrGLuint mask, GrGLenum coverMode, GrGLenum transformType, const GrGLfloat *transformValues);
    215 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLStencilThenCoverStrokePathInstancedProc)(GrGLsizei numPaths, GrGLenum pathNameType, const GrGLvoid *paths, GrGLuint pathBase, GrGLint reference, GrGLuint mask, GrGLenum coverMode, GrGLenum transformType, const GrGLfloat *transformValues);
    216 // NV_path_rendering v1.3
    217 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLProgramPathFragmentInputGenProc)(GrGLuint program, GrGLint location, GrGLenum genMode, GrGLint components,const GrGLfloat *coeffs);
    218 // CHROMIUM_path_rendering
    219 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLBindFragmentInputLocationProc)(GrGLuint program, GrGLint location, const GrGLchar* name);
    220 
    221 /* ARB_program_interface_query */
    222 typedef GrGLint (GR_GL_FUNCTION_TYPE* GrGLGetProgramResourceLocationProc)(GrGLuint program, GrGLenum programInterface, const GrGLchar *name);
    223 
    224 /* GL_NV_framebuffer_mixed_samples */
    225 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLCoverageModulationProc)(GrGLenum components);
    226 
    227 /* EXT_multi_draw_indirect */
    228 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLMultiDrawArraysIndirectProc)(GrGLenum mode, const GrGLvoid *indirect, GrGLsizei drawcount, GrGLsizei stride);
    229 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLMultiDrawElementsIndirectProc)(GrGLenum mode, GrGLenum type, const GrGLvoid *indirect, GrGLsizei drawcount, GrGLsizei stride);
    230 
    231 /* NV_bindless_texture */
    232 typedef GrGLuint64 (GR_GL_FUNCTION_TYPE* GrGLGetTextureHandleProc)(GrGLuint texture);
    233 typedef GrGLuint64 (GR_GL_FUNCTION_TYPE* GrGLGetTextureSamplerHandleProc)(GrGLuint texture, GrGLuint sampler);
    234 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLMakeTextureHandleResidentProc)(GrGLuint64 handle);
    235 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLMakeTextureHandleNonResidentProc)(GrGLuint64 handle);
    236 typedef GrGLuint64 (GR_GL_FUNCTION_TYPE* GrGLGetImageHandleProc)(GrGLuint texture, GrGLint level, GrGLboolean layered, GrGLint layer, GrGLint format);
    237 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLMakeImageHandleResidentProc)(GrGLuint64 handle, GrGLenum access);
    238 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLMakeImageHandleNonResidentProc)(GrGLuint64 handle);
    239 typedef GrGLboolean (GR_GL_FUNCTION_TYPE* GrGLIsTextureHandleResidentProc)(GrGLuint64 handle);
    240 typedef GrGLboolean (GR_GL_FUNCTION_TYPE* GrGLIsImageHandleResidentProc)(GrGLuint64 handle);
    241 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLUniformHandleui64Proc)(GrGLint location, GrGLuint64 v0);
    242 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLUniformHandleui64vProc)(GrGLint location, GrGLsizei count, const GrGLuint64 *value);
    243 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLProgramUniformHandleui64Proc)(GrGLuint program, GrGLint location, GrGLuint64 v0);
    244 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLProgramUniformHandleui64vProc)(GrGLuint program, GrGLint location, GrGLsizei count, const GrGLuint64 *value);
    245 
    246 /* ARB_sample_shading */
    247 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLMinSampleShadingProc)(GrGLfloat value);
    248 
    249 /* EXT_direct_state_access */
    250 // (In the future some of these methods may be omitted)
    251 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLTextureParameteriProc)(GrGLuint texture, GrGLenum target, GrGLenum pname, GrGLint param);
    252 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLTextureParameterivProc)(GrGLuint texture, GrGLenum target, GrGLenum pname, const GrGLint *param);
    253 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLTextureParameterfProc)(GrGLuint texture, GrGLenum target, GrGLenum pname, float param);
    254 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLTextureParameterfvProc)(GrGLuint texture, GrGLenum target, GrGLenum pname, const float *param);
    255 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLTextureImage1DProc)(GrGLuint texture, GrGLenum target, GrGLint level, GrGLint GrGLinternalformat, GrGLsizei width, GrGLint border, GrGLenum format, GrGLenum type, const GrGLvoid *pixels);
    256 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLTextureImage2DProc)(GrGLuint texture, GrGLenum target, GrGLint level, GrGLint GrGLinternalformat, GrGLsizei width, GrGLsizei height, GrGLint border, GrGLenum format, GrGLenum type, const GrGLvoid *pixels);
    257 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLTextureSubImage1DProc)(GrGLuint texture, GrGLenum target, GrGLint level, GrGLint xoffset, GrGLsizei width, GrGLenum format, GrGLenum type, const GrGLvoid *pixels);
    258 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLTextureSubImage2DProc)(GrGLuint texture, GrGLenum target, GrGLint level, GrGLint xoffset, GrGLint yoffset, GrGLsizei width, GrGLsizei height, GrGLenum format, GrGLenum type, const GrGLvoid *pixels);
    259 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLCopyTextureImage1DProc)(GrGLuint texture, GrGLenum target, GrGLint level, GrGLenum GrGLinternalformat, GrGLint x, GrGLint y, GrGLsizei width, GrGLint border);
    260 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLCopyTextureImage2DProc)(GrGLuint texture, GrGLenum target, GrGLint level, GrGLenum GrGLinternalformat, GrGLint x, GrGLint y, GrGLsizei width, GrGLsizei height, GrGLint border);
    261 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLCopyTextureSubImage1DProc)(GrGLuint texture, GrGLenum target, GrGLint level, GrGLint xoffset, GrGLint x, GrGLint y, GrGLsizei width);
    262 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLCopyTextureSubImage2DProc)(GrGLuint texture, GrGLenum target, GrGLint level, GrGLint xoffset, GrGLint yoffset, GrGLint x, GrGLint y, GrGLsizei width, GrGLsizei height);
    263 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLGetTextureImageProc)(GrGLuint texture, GrGLenum target, GrGLint level, GrGLenum format, GrGLenum type, GrGLvoid *pixels);
    264 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLGetTextureParameterfvProc)(GrGLuint texture, GrGLenum target, GrGLenum pname, float *params);
    265 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLGetTextureParameterivProc)(GrGLuint texture, GrGLenum target, GrGLenum pname, GrGLint *params);
    266 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLGetTextureLevelParameterfvProc)(GrGLuint texture, GrGLenum target, GrGLint level, GrGLenum pname, float *params);
    267 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLGetTextureLevelParameterivProc)(GrGLuint texture, GrGLenum target, GrGLint level, GrGLenum pname, GrGLint *params);
    268 // OpenGL 1.2
    269 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLTextureImage3DProc)(GrGLuint texture, GrGLenum target, GrGLint level, GrGLint GrGLinternalformat, GrGLsizei width, GrGLsizei height, GrGLsizei depth, GrGLint border, GrGLenum format, GrGLenum type, const GrGLvoid *pixels);
    270 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLTextureSubImage3DProc)(GrGLuint texture, GrGLenum target, GrGLint level, GrGLint xoffset, GrGLint yoffset, GrGLint zoffset, GrGLsizei width, GrGLsizei height, GrGLsizei depth, GrGLenum format, GrGLenum type, const GrGLvoid *pixels);
    271 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLCopyTextureSubImage3DProc)(GrGLuint texture, GrGLenum target, GrGLint level, GrGLint xoffset, GrGLint yoffset, GrGLint zoffset, GrGLint x, GrGLint y, GrGLsizei width, GrGLsizei height);
    272 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLCompressedTextureImage3DProc)(GrGLuint texture, GrGLenum target, GrGLint level, GrGLenum GrGLinternalformat, GrGLsizei width, GrGLsizei height, GrGLsizei depth, GrGLint border, GrGLsizei imageSize, const GrGLvoid *data);
    273 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLCompressedTextureImage2DProc)(GrGLuint texture, GrGLenum target, GrGLint level, GrGLenum GrGLinternalformat, GrGLsizei width, GrGLsizei height, GrGLint border, GrGLsizei imageSize, const GrGLvoid *data);
    274 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLCompressedTextureImage1DProc)(GrGLuint texture, GrGLenum target, GrGLint level, GrGLenum GrGLinternalformat, GrGLsizei width, GrGLint border, GrGLsizei imageSize, const GrGLvoid *data);
    275 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLCompressedTextureSubImage3DProc)(GrGLuint texture, GrGLenum target, GrGLint level, GrGLint xoffset, GrGLint yoffset, GrGLint zoffset, GrGLsizei width, GrGLsizei height, GrGLsizei depth, GrGLenum format, GrGLsizei imageSize, const GrGLvoid *data);
    276 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLCompressedTextureSubImage2DProc)(GrGLuint texture, GrGLenum target, GrGLint level, GrGLint xoffset, GrGLint yoffset, GrGLsizei width, GrGLsizei height, GrGLenum format, GrGLsizei imageSize, const GrGLvoid *data);
    277 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLCompressedTextureSubImage1DProc)(GrGLuint texture, GrGLenum target, GrGLint level, GrGLint xoffset, GrGLsizei width, GrGLenum format, GrGLsizei imageSize, const GrGLvoid *data);
    278 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLGetCompressedTextureImageProc)(GrGLuint texture, GrGLenum target, GrGLint level, GrGLvoid *img);
    279 // OpenGL 1.5
    280 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLNamedBufferDataProc)(GrGLuint buffer, GrGLsizeiptr size, const GrGLvoid *data, GrGLenum usage);
    281 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLNamedBufferSubDataProc)(GrGLuint buffer, GrGLintptr offset, GrGLsizeiptr size, const GrGLvoid *data);
    282 typedef GrGLvoid* (GR_GL_FUNCTION_TYPE* GrGLMapNamedBufferProc)(GrGLuint buffer, GrGLenum access);
    283 typedef GrGLboolean (GR_GL_FUNCTION_TYPE* GrGLUnmapNamedBufferProc)(GrGLuint buffer);
    284 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLGetNamedBufferParameterivProc)(GrGLuint buffer, GrGLenum pname, GrGLint *params);
    285 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLGetNamedBufferPointervProc)(GrGLuint buffer, GrGLenum pname, GrGLvoid* *params);
    286 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLGetNamedBufferSubDataProc)(GrGLuint buffer, GrGLintptr offset, GrGLsizeiptr size, GrGLvoid *data);
    287 // OpenGL 2.0
    288 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLProgramUniform1fProc)(GrGLuint program, GrGLint location, float v0);
    289 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLProgramUniform2fProc)(GrGLuint program, GrGLint location, float v0, float v1);
    290 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLProgramUniform3fProc)(GrGLuint program, GrGLint location, float v0, float v1, float v2);
    291 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLProgramUniform4fProc)(GrGLuint program, GrGLint location, float v0, float v1, float v2, float v3);
    292 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLProgramUniform1iProc)(GrGLuint program, GrGLint location, GrGLint v0);
    293 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLProgramUniform2iProc)(GrGLuint program, GrGLint location, GrGLint v0, GrGLint v1);
    294 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLProgramUniform3iProc)(GrGLuint program, GrGLint location, GrGLint v0, GrGLint v1, GrGLint v2);
    295 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLProgramUniform4iProc)(GrGLuint program, GrGLint location, GrGLint v0, GrGLint v1, GrGLint v2, GrGLint v3);
    296 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLProgramUniform1fvProc)(GrGLuint program, GrGLint location, GrGLsizei count, const float *value);
    297 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLProgramUniform2fvProc)(GrGLuint program, GrGLint location, GrGLsizei count, const float *value);
    298 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLProgramUniform3fvProc)(GrGLuint program, GrGLint location, GrGLsizei count, const float *value);
    299 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLProgramUniform4fvProc)(GrGLuint program, GrGLint location, GrGLsizei count, const float *value);
    300 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLProgramUniform1ivProc)(GrGLuint program, GrGLint location, GrGLsizei count, const GrGLint *value);
    301 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLProgramUniform2ivProc)(GrGLuint program, GrGLint location, GrGLsizei count, const GrGLint *value);
    302 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLProgramUniform3ivProc)(GrGLuint program, GrGLint location, GrGLsizei count, const GrGLint *value);
    303 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLProgramUniform4ivProc)(GrGLuint program, GrGLint location, GrGLsizei count, const GrGLint *value);
    304 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLProgramUniformMatrix2fvProc)(GrGLuint program, GrGLint location, GrGLsizei count, GrGLboolean transpose, const float *value);
    305 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLProgramUniformMatrix3fvProc)(GrGLuint program, GrGLint location, GrGLsizei count, GrGLboolean transpose, const float *value);
    306 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLProgramUniformMatrix4fvProc)(GrGLuint program, GrGLint location, GrGLsizei count, GrGLboolean transpose, const float *value);
    307 // OpenGL 2.1
    308 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLProgramUniformMatrix2x3fvProc)(GrGLuint program, GrGLint location, GrGLsizei count, GrGLboolean transpose, const float *value);
    309 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLProgramUniformMatrix3x2fvProc)(GrGLuint program, GrGLint location, GrGLsizei count, GrGLboolean transpose, const float *value);
    310 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLProgramUniformMatrix2x4fvProc)(GrGLuint program, GrGLint location, GrGLsizei count, GrGLboolean transpose, const float *value);
    311 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLProgramUniformMatrix4x2fvProc)(GrGLuint program, GrGLint location, GrGLsizei count, GrGLboolean transpose, const float *value);
    312 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLProgramUniformMatrix3x4fvProc)(GrGLuint program, GrGLint location, GrGLsizei count, GrGLboolean transpose, const float *value);
    313 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLProgramUniformMatrix4x3fvProc)(GrGLuint program, GrGLint location, GrGLsizei count, GrGLboolean transpose, const float *value);
    314 // OpenGL 3.0
    315 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLNamedRenderbufferStorageProc)(GrGLuint renderbuffer, GrGLenum GrGLinternalformat, GrGLsizei width, GrGLsizei height);
    316 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLGetNamedRenderbufferParameterivProc)(GrGLuint renderbuffer, GrGLenum pname, GrGLint *params);
    317 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLNamedRenderbufferStorageMultisampleProc)(GrGLuint renderbuffer, GrGLsizei samples, GrGLenum GrGLinternalformat, GrGLsizei width, GrGLsizei height);
    318 typedef GrGLenum (GR_GL_FUNCTION_TYPE* GrGLCheckNamedFramebufferStatusProc)(GrGLuint framebuffer, GrGLenum target);
    319 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLNamedFramebufferTexture1DProc)(GrGLuint framebuffer, GrGLenum attachment, GrGLenum textarget, GrGLuint texture, GrGLint level);
    320 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLNamedFramebufferTexture2DProc)(GrGLuint framebuffer, GrGLenum attachment, GrGLenum textarget, GrGLuint texture, GrGLint level);
    321 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLNamedFramebufferTexture3DProc)(GrGLuint framebuffer, GrGLenum attachment, GrGLenum textarget, GrGLuint texture, GrGLint level, GrGLint zoffset);
    322 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLNamedFramebufferRenderbufferProc)(GrGLuint framebuffer, GrGLenum attachment, GrGLenum renderbuffertarget, GrGLuint renderbuffer);
    323 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLGetNamedFramebufferAttachmentParameterivProc)(GrGLuint framebuffer, GrGLenum attachment, GrGLenum pname, GrGLint *params);
    324 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLGenerateTextureMipmapProc)(GrGLuint texture, GrGLenum target);
    325 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLFramebufferDrawBufferProc)(GrGLuint framebuffer, GrGLenum mode);
    326 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLFramebufferDrawBuffersProc)(GrGLuint framebuffer, GrGLsizei n, const GrGLenum *bufs);
    327 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLFramebufferReadBufferProc)(GrGLuint framebuffer, GrGLenum mode);
    328 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLGetFramebufferParameterivProc)(GrGLuint framebuffer, GrGLenum pname, GrGLint *param);
    329 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLNamedCopyBufferSubDataProc)(GrGLuint readBuffer, GrGLuint writeBuffer, GrGLintptr readOffset, GrGLintptr writeOffset, GrGLsizeiptr size);
    330 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLVertexArrayVertexOffsetProc)(GrGLuint vaobj, GrGLuint buffer, GrGLint size, GrGLenum type, GrGLsizei stride, GrGLintptr offset);
    331 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLVertexArrayColorOffsetProc)(GrGLuint vaobj, GrGLuint buffer, GrGLint size, GrGLenum type, GrGLsizei stride, GrGLintptr offset);
    332 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLVertexArrayEdgeFlagOffsetProc)(GrGLuint vaobj, GrGLuint buffer, GrGLsizei stride, GrGLintptr offset);
    333 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLVertexArrayIndexOffsetProc)(GrGLuint vaobj, GrGLuint buffer, GrGLenum type, GrGLsizei stride, GrGLintptr offset);
    334 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLVertexArrayNormalOffsetProc)(GrGLuint vaobj, GrGLuint buffer, GrGLenum type, GrGLsizei stride, GrGLintptr offset);
    335 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLVertexArrayTexCoordOffsetProc)(GrGLuint vaobj, GrGLuint buffer, GrGLint size, GrGLenum type, GrGLsizei stride, GrGLintptr offset);
    336 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLVertexArrayMultiTexCoordOffsetProc)(GrGLuint vaobj, GrGLuint buffer, GrGLenum texunit, GrGLint size, GrGLenum type, GrGLsizei stride, GrGLintptr offset);
    337 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLVertexArrayFogCoordOffsetProc)(GrGLuint vaobj, GrGLuint buffer, GrGLenum type, GrGLsizei stride, GrGLintptr offset);
    338 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLVertexArraySecondaryColorOffsetProc)(GrGLuint vaobj, GrGLuint buffer, GrGLint size, GrGLenum type, GrGLsizei stride, GrGLintptr offset);
    339 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLVertexArrayVertexAttribOffsetProc)(GrGLuint vaobj, GrGLuint buffer, GrGLuint index, GrGLint size, GrGLenum type, GrGLboolean normalized, GrGLsizei stride, GrGLintptr offset);
    340 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLVertexArrayVertexAttribIOffsetProc)(GrGLuint vaobj, GrGLuint buffer, GrGLuint index, GrGLint size, GrGLenum type, GrGLsizei stride, GrGLintptr offset);
    341 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLEnableVertexArrayProc)(GrGLuint vaobj, GrGLenum array);
    342 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLDisableVertexArrayProc)(GrGLuint vaobj, GrGLenum array);
    343 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLEnableVertexArrayAttribProc)(GrGLuint vaobj, GrGLuint index);
    344 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLDisableVertexArrayAttribProc)(GrGLuint vaobj, GrGLuint index);
    345 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLGetVertexArrayIntegervProc)(GrGLuint vaobj, GrGLenum pname, GrGLint *param);
    346 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLGetVertexArrayPointervProc)(GrGLuint vaobj, GrGLenum pname, GrGLvoid **param);
    347 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLGetVertexArrayIntegeri_vProc)(GrGLuint vaobj, GrGLuint index, GrGLenum pname, GrGLint *param);
    348 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLGetVertexArrayPointeri_vProc)(GrGLuint vaobj, GrGLuint index, GrGLenum pname, GrGLvoid **param);
    349 typedef GrGLvoid* (GR_GL_FUNCTION_TYPE* GrGLMapNamedBufferRangeProc)(GrGLuint buffer, GrGLintptr offset, GrGLsizeiptr length, GrGLbitfield access);
    350 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLFlushMappedNamedBufferRangeProc)(GrGLuint buffer, GrGLintptr offset, GrGLsizeiptr length);
    351 // OpenGL 3.1
    352 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLTextureBufferProc)(GrGLuint texture, GrGLenum target, GrGLenum internalformat, GrGLuint buffer);
    353 
    354 /* ARB_sync */
    355 typedef GrGLsync (GR_GL_FUNCTION_TYPE* GrGLFenceSyncProc)(GrGLenum condition, GrGLbitfield flags);
    356 typedef GrGLenum (GR_GL_FUNCTION_TYPE* GrGLClientWaitSyncProc)(GrGLsync sync, GrGLbitfield flags, GrGLuint64 timeout);
    357 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLWaitSyncProc)(GrGLsync sync, GrGLbitfield flags, GrGLuint64 timeout);
    358 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLDeleteSyncProc)(GrGLsync sync);
    359 
    360 /* ARB_internalformat_query */
    361 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLGetInternalformativProc)(GrGLenum target, GrGLenum internalformat, GrGLenum pname, GrGLsizei bufSize, GrGLint *params);
    362 
    363 /* KHR_debug */
    364 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLDebugMessageControlProc)(GrGLenum source, GrGLenum type, GrGLenum severity, GrGLsizei count, const GrGLuint* ids, GrGLboolean enabled);
    365 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLDebugMessageInsertProc)(GrGLenum source, GrGLenum type, GrGLuint id, GrGLenum severity, GrGLsizei length,  const GrGLchar* buf);
    366 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLDebugMessageCallbackProc)(GRGLDEBUGPROC callback, const GrGLvoid* userParam);
    367 typedef GrGLuint (GR_GL_FUNCTION_TYPE* GrGLGetDebugMessageLogProc)(GrGLuint count, GrGLsizei bufSize, GrGLenum* sources, GrGLenum* types, GrGLuint* ids, GrGLenum* severities, GrGLsizei* lengths,  GrGLchar* messageLog);
    368 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLPushDebugGroupProc)(GrGLenum source, GrGLuint id, GrGLsizei length,  const GrGLchar * message);
    369 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLPopDebugGroupProc)();
    370 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLObjectLabelProc)(GrGLenum identifier, GrGLuint name, GrGLsizei length, const GrGLchar *label);
    371 
    372 /** EXT_window_rectangles */
    373 typedef GrGLvoid (GR_GL_FUNCTION_TYPE* GrGLWindowRectanglesProc)(GrGLenum mode, GrGLsizei count, const GrGLint box[]);
    374 
    375 /** EGL functions */
    376 typedef const char* (GR_GL_FUNCTION_TYPE* GrEGLQueryStringProc)(GrEGLDisplay dpy, GrEGLint name);
    377 typedef GrEGLDisplay (GR_GL_FUNCTION_TYPE* GrEGLGetCurrentDisplayProc)();
    378 typedef GrEGLImage (GR_GL_FUNCTION_TYPE* GrEGLCreateImageProc)(GrEGLDisplay dpy, GrEGLContext ctx, GrEGLenum target, GrEGLClientBuffer buffer, const GrEGLint *attrib_list);
    379 typedef GrEGLBoolean (GR_GL_FUNCTION_TYPE* GrEGLDestroyImageProc)(GrEGLDisplay dpy, GrEGLImage image);
    380 }  // extern "C"
    381 
    382 template <typename GLPTR> using GrGLFunction = std::function<skstd::remove_pointer_t<GLPTR>>;
    383 
    384 #endif
    385