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 "GrGLTypes.h"
13 #include "../private/SkTLogic.h"
14 
15 extern "C" {
16 
17 ///////////////////////////////////////////////////////////////////////////////
18 
19 typedef GrGLvoid (* GrGLActiveTextureProc)(GrGLenum texture);
20 typedef GrGLvoid (* GrGLAttachShaderProc)(GrGLuint program, GrGLuint shader);
21 typedef GrGLvoid (* GrGLBeginQueryProc)(GrGLenum target, GrGLuint id);
22 typedef GrGLvoid (* GrGLBindAttribLocationProc)(GrGLuint program, GrGLuint index, const char* name);
23 typedef GrGLvoid (* GrGLBindBufferProc)(GrGLenum target, GrGLuint buffer);
24 typedef GrGLvoid (* GrGLBindFramebufferProc)(GrGLenum target, GrGLuint framebuffer);
25 typedef GrGLvoid (* GrGLBindRenderbufferProc)(GrGLenum target, GrGLuint renderbuffer);
26 typedef GrGLvoid (* GrGLBindImageTextureProc)(GrGLuint unit, GrGLuint texture, GrGLint level, GrGLboolean layered, GrGLint layer, GrGLenum access, GrGLenum format);
27 typedef GrGLvoid (* GrGLBindTextureProc)(GrGLenum target, GrGLuint texture);
28 typedef GrGLvoid (* GrGLBindFragDataLocationProc)(GrGLuint program, GrGLuint colorNumber, const GrGLchar* name);
29 typedef GrGLvoid (* GrGLBindFragDataLocationIndexedProc)(GrGLuint program, GrGLuint colorNumber, GrGLuint index, const GrGLchar * name);
30 typedef GrGLvoid (* GrGLBindVertexArrayProc)(GrGLuint array);
31 typedef GrGLvoid (* GrGLBlendBarrierProc)();
32 typedef GrGLvoid (* GrGLBlendColorProc)(GrGLclampf red, GrGLclampf green, GrGLclampf blue, GrGLclampf alpha);
33 typedef GrGLvoid (* GrGLBlendEquationProc)(GrGLenum mode);
34 typedef GrGLvoid (* GrGLBlendFuncProc)(GrGLenum sfactor, GrGLenum dfactor);
35 typedef GrGLvoid (* GrGLBlitFramebufferProc)(GrGLint srcX0, GrGLint srcY0, GrGLint srcX1, GrGLint srcY1, GrGLint dstX0, GrGLint dstY0, GrGLint dstX1, GrGLint dstY1, GrGLbitfield mask, GrGLenum filter);
36 typedef GrGLvoid (* GrGLBufferDataProc)(GrGLenum target, GrGLsizeiptr size, const GrGLvoid* data, GrGLenum usage);
37 typedef GrGLvoid (* GrGLBufferSubDataProc)(GrGLenum target, GrGLintptr offset, GrGLsizeiptr size, const GrGLvoid* data);
38 typedef GrGLenum (* GrGLCheckFramebufferStatusProc)(GrGLenum target);
39 typedef GrGLvoid (* GrGLClearProc)(GrGLbitfield mask);
40 typedef GrGLvoid (* GrGLClearColorProc)(GrGLclampf red, GrGLclampf green, GrGLclampf blue, GrGLclampf alpha);
41 typedef GrGLvoid (* GrGLClearStencilProc)(GrGLint s);
42 typedef GrGLvoid (* GrGLClearTexImageProc)(GrGLuint texture, GrGLint level, GrGLenum format, GrGLenum type,const GrGLvoid * data);
43 typedef GrGLvoid (* GrGLClearTexSubImageProc)(GrGLuint texture, GrGLint level, GrGLint xoffset, GrGLint yoffset, GrGLint zoffset, GrGLsizei width, GrGLsizei height, GrGLsizei depth, GrGLenum format, GrGLenum type,const GrGLvoid * data);
44 typedef GrGLvoid (* GrGLColorMaskProc)(GrGLboolean red, GrGLboolean green, GrGLboolean blue, GrGLboolean alpha);
45 typedef GrGLvoid (* GrGLCompileShaderProc)(GrGLuint shader);
46 typedef GrGLvoid (* GrGLCompressedTexImage2DProc)(GrGLenum target, GrGLint level, GrGLenum internalformat, GrGLsizei width, GrGLsizei height, GrGLint border, GrGLsizei imageSize, const GrGLvoid* data);
47 typedef GrGLvoid (* GrGLCompressedTexSubImage2DProc)(GrGLenum target, GrGLint level, GrGLint xoffset, GrGLint yoffset, GrGLsizei width, GrGLsizei height, GrGLenum format, GrGLsizei imageSize, const GrGLvoid* data);
48 typedef GrGLvoid (* GrGLCopyTexSubImage2DProc)(GrGLenum target, GrGLint level, GrGLint xoffset, GrGLint yoffset, GrGLint x, GrGLint y, GrGLsizei width, GrGLsizei height);
49 typedef GrGLuint (* GrGLCreateProgramProc)();
50 typedef GrGLuint (* GrGLCreateShaderProc)(GrGLenum type);
51 typedef GrGLvoid (* GrGLCullFaceProc)(GrGLenum mode);
52 typedef GrGLvoid (* GrGLDeleteBuffersProc)(GrGLsizei n, const GrGLuint* buffers);
53 typedef GrGLvoid (* GrGLDeleteFramebuffersProc)(GrGLsizei n, const GrGLuint *framebuffers);
54 typedef GrGLvoid (* GrGLDeleteProgramProc)(GrGLuint program);
55 typedef GrGLvoid (* GrGLDeleteQueriesProc)(GrGLsizei n, const GrGLuint *ids);
56 typedef GrGLvoid (* GrGLDeleteRenderbuffersProc)(GrGLsizei n, const GrGLuint *renderbuffers);
57 typedef GrGLvoid (* GrGLDeleteShaderProc)(GrGLuint shader);
58 typedef GrGLvoid (* GrGLDeleteTexturesProc)(GrGLsizei n, const GrGLuint* textures);
59 typedef GrGLvoid (* GrGLDeleteVertexArraysProc)(GrGLsizei n, const GrGLuint *arrays);
60 typedef GrGLvoid (* GrGLDepthMaskProc)(GrGLboolean flag);
61 typedef GrGLvoid (* GrGLDisableProc)(GrGLenum cap);
62 typedef GrGLvoid (* GrGLDisableVertexAttribArrayProc)(GrGLuint index);
63 typedef GrGLvoid (* GrGLDrawArraysProc)(GrGLenum mode, GrGLint first, GrGLsizei count);
64 typedef GrGLvoid (* GrGLDrawArraysInstancedProc)(GrGLenum mode, GrGLint first, GrGLsizei count, GrGLsizei primcount);
65 typedef GrGLvoid (* GrGLDrawArraysIndirectProc)(GrGLenum mode, const GrGLvoid* indirect);
66 typedef GrGLvoid (* GrGLDrawBufferProc)(GrGLenum mode);
67 typedef GrGLvoid (* GrGLDrawBuffersProc)(GrGLsizei n, const GrGLenum* bufs);
68 typedef GrGLvoid (* GrGLDrawElementsProc)(GrGLenum mode, GrGLsizei count, GrGLenum type, const GrGLvoid* indices);
69 typedef GrGLvoid (* GrGLDrawElementsInstancedProc)(GrGLenum mode, GrGLsizei count, GrGLenum type, const GrGLvoid *indices, GrGLsizei primcount);
70 typedef GrGLvoid (* GrGLDrawElementsIndirectProc)(GrGLenum mode, GrGLenum type, const GrGLvoid* indirect);
71 typedef GrGLvoid (* GrGLDrawRangeElementsProc)(GrGLenum mode, GrGLuint start, GrGLuint end, GrGLsizei count, GrGLenum type, const GrGLvoid* indices);
72 typedef GrGLvoid (* GrGLEnableProc)(GrGLenum cap);
73 typedef GrGLvoid (* GrGLEnableVertexAttribArrayProc)(GrGLuint index);
74 typedef GrGLvoid (* GrGLEndQueryProc)(GrGLenum target);
75 typedef GrGLvoid (* GrGLFinishProc)();
76 typedef GrGLvoid (* GrGLFlushProc)();
77 typedef GrGLvoid (* GrGLFlushMappedBufferRangeProc)(GrGLenum target, GrGLintptr offset, GrGLsizeiptr length);
78 typedef GrGLvoid (* GrGLFramebufferRenderbufferProc)(GrGLenum target, GrGLenum attachment, GrGLenum renderbuffertarget, GrGLuint renderbuffer);
79 typedef GrGLvoid (* GrGLFramebufferTexture2DProc)(GrGLenum target, GrGLenum attachment, GrGLenum textarget, GrGLuint texture, GrGLint level);
80 typedef GrGLvoid (* GrGLFramebufferTexture2DMultisampleProc)(GrGLenum target, GrGLenum attachment, GrGLenum textarget, GrGLuint texture, GrGLint level, GrGLsizei samples);
81 typedef GrGLvoid (* GrGLFrontFaceProc)(GrGLenum mode);
82 typedef GrGLvoid (* GrGLGenBuffersProc)(GrGLsizei n, GrGLuint* buffers);
83 typedef GrGLvoid (* GrGLGenFramebuffersProc)(GrGLsizei n, GrGLuint *framebuffers);
84 typedef GrGLvoid (* GrGLGenerateMipmapProc)(GrGLenum target);
85 typedef GrGLvoid (* GrGLGenQueriesProc)(GrGLsizei n, GrGLuint *ids);
86 typedef GrGLvoid (* GrGLGenRenderbuffersProc)(GrGLsizei n, GrGLuint *renderbuffers);
87 typedef GrGLvoid (* GrGLGenTexturesProc)(GrGLsizei n, GrGLuint* textures);
88 typedef GrGLvoid (* GrGLGenVertexArraysProc)(GrGLsizei n, GrGLuint *arrays);
89 typedef GrGLvoid (* GrGLGetBufferParameterivProc)(GrGLenum target, GrGLenum pname, GrGLint* params);
90 typedef GrGLenum (* GrGLGetErrorProc)();
91 typedef GrGLvoid (* GrGLGetFramebufferAttachmentParameterivProc)(GrGLenum target, GrGLenum attachment, GrGLenum pname, GrGLint* params);
92 typedef GrGLvoid (* GrGLGetIntegervProc)(GrGLenum pname, GrGLint* params);
93 typedef GrGLvoid (* GrGLGetMultisamplefvProc)(GrGLenum pname, GrGLuint index, GrGLfloat* val);
94 typedef GrGLvoid (* GrGLGetProgramBinaryProc)(GrGLuint program, GrGLsizei bufsize, GrGLsizei* length, GrGLenum *binaryFormat, void *binary);
95 typedef GrGLvoid (* GrGLGetProgramInfoLogProc)(GrGLuint program, GrGLsizei bufsize, GrGLsizei* length, char* infolog);
96 typedef GrGLvoid (* GrGLGetProgramivProc)(GrGLuint program, GrGLenum pname, GrGLint* params);
97 typedef GrGLvoid (* GrGLGetQueryivProc)(GrGLenum GLtarget, GrGLenum pname, GrGLint *params);
98 typedef GrGLvoid (* GrGLGetQueryObjecti64vProc)(GrGLuint id, GrGLenum pname, GrGLint64 *params);
99 typedef GrGLvoid (* GrGLGetQueryObjectivProc)(GrGLuint id, GrGLenum pname, GrGLint *params);
100 typedef GrGLvoid (* GrGLGetQueryObjectui64vProc)(GrGLuint id, GrGLenum pname, GrGLuint64 *params);
101 typedef GrGLvoid (* GrGLGetQueryObjectuivProc)(GrGLuint id, GrGLenum pname, GrGLuint *params);
102 typedef GrGLvoid (* GrGLGetRenderbufferParameterivProc)(GrGLenum target, GrGLenum pname, GrGLint* params);
103 typedef GrGLvoid (* GrGLGetShaderInfoLogProc)(GrGLuint shader, GrGLsizei bufsize, GrGLsizei* length, char* infolog);
104 typedef GrGLvoid (* GrGLGetShaderivProc)(GrGLuint shader, GrGLenum pname, GrGLint* params);
105 typedef GrGLvoid (* GrGLGetShaderPrecisionFormatProc)(GrGLenum shadertype, GrGLenum precisiontype, GrGLint *range, GrGLint *precision);
106 typedef const GrGLubyte* (* GrGLGetStringProc)(GrGLenum name);
107 typedef const GrGLubyte* (* GrGLGetStringiProc)(GrGLenum name, GrGLuint index);
108 typedef GrGLvoid (* GrGLGetTexLevelParameterivProc)(GrGLenum target, GrGLint level, GrGLenum pname, GrGLint* params);
109 typedef GrGLint (* GrGLGetUniformLocationProc)(GrGLuint program, const char* name);
110 typedef GrGLvoid (* GrGLInsertEventMarkerProc)(GrGLsizei length, const char* marker);
111 typedef GrGLvoid (* GrGLInvalidateBufferDataProc)(GrGLuint buffer);
112 typedef GrGLvoid (* GrGLInvalidateBufferSubDataProc)(GrGLuint buffer, GrGLintptr offset, GrGLsizeiptr length);
113 typedef GrGLvoid (* GrGLInvalidateFramebufferProc)(GrGLenum target, GrGLsizei numAttachments,  const GrGLenum *attachments);
114 typedef GrGLvoid (* GrGLInvalidateSubFramebufferProc)(GrGLenum target, GrGLsizei numAttachments, const GrGLenum *attachments, GrGLint x, GrGLint y, GrGLsizei width, GrGLsizei height);
115 typedef GrGLvoid (* GrGLInvalidateTexImageProc)(GrGLuint texture, GrGLint level);
116 typedef GrGLvoid (* GrGLInvalidateTexSubImageProc)(GrGLuint texture, GrGLint level, GrGLint xoffset, GrGLint yoffset, GrGLint zoffset, GrGLsizei width, GrGLsizei height, GrGLsizei depth);
117 typedef GrGLboolean (* GrGLIsTextureProc)(GrGLuint texture);
118 typedef GrGLvoid (* GrGLLineWidthProc)(GrGLfloat width);
119 typedef GrGLvoid (* GrGLLinkProgramProc)(GrGLuint program);
120 typedef GrGLvoid* (* GrGLMapBufferProc)(GrGLenum target, GrGLenum access);
121 typedef GrGLvoid* (* GrGLMapBufferRangeProc)(GrGLenum target, GrGLintptr offset, GrGLsizeiptr length, GrGLbitfield access);
122 typedef GrGLvoid* (* GrGLMapBufferSubDataProc)(GrGLuint target, GrGLintptr offset, GrGLsizeiptr size, GrGLenum access);
123 typedef GrGLvoid* (* GrGLMapTexSubImage2DProc)(GrGLenum target, GrGLint level, GrGLint xoffset, GrGLint yoffset, GrGLsizei width, GrGLsizei height, GrGLenum format, GrGLenum type, GrGLenum access);
124 typedef GrGLvoid* (* GrGLMemoryBarrierProc)(GrGLbitfield barriers);
125 typedef GrGLvoid* (* GrGLMemoryBarrierByRegionProc)(GrGLbitfield barriers);
126 typedef GrGLvoid (* GrGLPixelStoreiProc)(GrGLenum pname, GrGLint param);
127 typedef GrGLvoid (* GrGLPolygonModeProc)(GrGLenum face, GrGLenum mode);
128 typedef GrGLvoid (* GrGLPopGroupMarkerProc)();
129 typedef GrGLvoid (* GrGLProgramBinaryProc)(GrGLuint program, GrGLenum binaryFormat, void *binary, GrGLsizei length);
130 typedef GrGLvoid (* GrGLProgramParameteriProc)(GrGLuint program, GrGLenum pname, GrGLint value);
131 typedef GrGLvoid (* GrGLPushGroupMarkerProc)(GrGLsizei length, const char* marker);
132 typedef GrGLvoid (* GrGLQueryCounterProc)(GrGLuint id, GrGLenum target);
133 typedef GrGLvoid (* GrGLRasterSamplesProc)(GrGLuint samples, GrGLboolean fixedsamplelocations);
134 typedef GrGLvoid (* GrGLReadBufferProc)(GrGLenum src);
135 typedef GrGLvoid (* GrGLReadPixelsProc)(GrGLint x, GrGLint y, GrGLsizei width, GrGLsizei height, GrGLenum format, GrGLenum type, GrGLvoid* pixels);
136 typedef GrGLvoid (* GrGLRenderbufferStorageProc)(GrGLenum target, GrGLenum internalformat, GrGLsizei width, GrGLsizei height);
137 typedef GrGLvoid (* GrGLRenderbufferStorageMultisampleProc)(GrGLenum target, GrGLsizei samples, GrGLenum internalformat, GrGLsizei width, GrGLsizei height);
138 typedef GrGLvoid (* GrGLResolveMultisampleFramebufferProc)();
139 typedef GrGLvoid (* GrGLScissorProc)(GrGLint x, GrGLint y, GrGLsizei width, GrGLsizei height);
140 // GL_CHROMIUM_bind_uniform_location
141 typedef GrGLvoid (* GrGLBindUniformLocationProc)(GrGLuint program, GrGLint location, const char* name);
142 
143 #if GR_GL_USE_NEW_SHADER_SOURCE_SIGNATURE
144 typedef GrGLvoid (* GrGLShaderSourceProc)(GrGLuint shader, GrGLsizei count, const char* const * str, const GrGLint* length);
145 #else
146 typedef GrGLvoid (* GrGLShaderSourceProc)(GrGLuint shader, GrGLsizei count, const char** str, const GrGLint* length);
147 #endif
148 typedef GrGLvoid (* GrGLStencilFuncProc)(GrGLenum func, GrGLint ref, GrGLuint mask);
149 typedef GrGLvoid (* GrGLStencilFuncSeparateProc)(GrGLenum face, GrGLenum func, GrGLint ref, GrGLuint mask);
150 typedef GrGLvoid (* GrGLStencilMaskProc)(GrGLuint mask);
151 typedef GrGLvoid (* GrGLStencilMaskSeparateProc)(GrGLenum face, GrGLuint mask);
152 typedef GrGLvoid (* GrGLStencilOpProc)(GrGLenum fail, GrGLenum zfail, GrGLenum zpass);
153 typedef GrGLvoid (* GrGLStencilOpSeparateProc)(GrGLenum face, GrGLenum fail, GrGLenum zfail, GrGLenum zpass);
154 typedef GrGLvoid (* GrGLTexBufferProc)(GrGLenum target, GrGLenum internalformat, GrGLuint buffer);
155 typedef GrGLvoid (* GrGLTexBufferRangeProc)(GrGLenum target, GrGLenum internalformat, GrGLuint buffer, GrGLintptr offset, GrGLsizeiptr size);
156 typedef GrGLvoid (* GrGLTexImage2DProc)(GrGLenum target, GrGLint level, GrGLint internalformat, GrGLsizei width, GrGLsizei height, GrGLint border, GrGLenum format, GrGLenum type, const GrGLvoid* pixels);
157 typedef GrGLvoid (* GrGLTexParameteriProc)(GrGLenum target, GrGLenum pname, GrGLint param);
158 typedef GrGLvoid (* GrGLTexParameterivProc)(GrGLenum target, GrGLenum pname, const GrGLint* params);
159 typedef GrGLvoid (* GrGLTexStorage2DProc)(GrGLenum target, GrGLsizei levels, GrGLenum internalformat, GrGLsizei width, GrGLsizei height);
160 typedef GrGLvoid (* GrGLDiscardFramebufferProc)(GrGLenum target, GrGLsizei numAttachments, const GrGLenum* attachments);
161 typedef GrGLvoid (* GrGLTexSubImage2DProc)(GrGLenum target, GrGLint level, GrGLint xoffset, GrGLint yoffset, GrGLsizei width, GrGLsizei height, GrGLenum format, GrGLenum type, const GrGLvoid* pixels);
162 typedef GrGLvoid (* GrGLTextureBarrierProc)();
163 typedef GrGLvoid (* GrGLUniform1fProc)(GrGLint location, GrGLfloat v0);
164 typedef GrGLvoid (* GrGLUniform1iProc)(GrGLint location, GrGLint v0);
165 typedef GrGLvoid (* GrGLUniform1fvProc)(GrGLint location, GrGLsizei count, const GrGLfloat* v);
166 typedef GrGLvoid (* GrGLUniform1ivProc)(GrGLint location, GrGLsizei count, const GrGLint* v);
167 typedef GrGLvoid (* GrGLUniform2fProc)(GrGLint location, GrGLfloat v0, GrGLfloat v1);
168 typedef GrGLvoid (* GrGLUniform2iProc)(GrGLint location, GrGLint v0, GrGLint v1);
169 typedef GrGLvoid (* GrGLUniform2fvProc)(GrGLint location, GrGLsizei count, const GrGLfloat* v);
170 typedef GrGLvoid (* GrGLUniform2ivProc)(GrGLint location, GrGLsizei count, const GrGLint* v);
171 typedef GrGLvoid (* GrGLUniform3fProc)(GrGLint location, GrGLfloat v0, GrGLfloat v1, GrGLfloat v2);
172 typedef GrGLvoid (* GrGLUniform3iProc)(GrGLint location, GrGLint v0, GrGLint v1, GrGLint v2);
173 typedef GrGLvoid (* GrGLUniform3fvProc)(GrGLint location, GrGLsizei count, const GrGLfloat* v);
174 typedef GrGLvoid (* GrGLUniform3ivProc)(GrGLint location, GrGLsizei count, const GrGLint* v);
175 typedef GrGLvoid (* GrGLUniform4fProc)(GrGLint location, GrGLfloat v0, GrGLfloat v1, GrGLfloat v2, GrGLfloat v3);
176 typedef GrGLvoid (* GrGLUniform4iProc)(GrGLint location, GrGLint v0, GrGLint v1, GrGLint v2, GrGLint v3);
177 typedef GrGLvoid (* GrGLUniform4fvProc)(GrGLint location, GrGLsizei count, const GrGLfloat* v);
178 typedef GrGLvoid (* GrGLUniform4ivProc)(GrGLint location, GrGLsizei count, const GrGLint* v);
179 typedef GrGLvoid (* GrGLUniformMatrix2fvProc)(GrGLint location, GrGLsizei count, GrGLboolean transpose, const GrGLfloat* value);
180 typedef GrGLvoid (* GrGLUniformMatrix3fvProc)(GrGLint location, GrGLsizei count, GrGLboolean transpose, const GrGLfloat* value);
181 typedef GrGLvoid (* GrGLUniformMatrix4fvProc)(GrGLint location, GrGLsizei count, GrGLboolean transpose, const GrGLfloat* value);
182 typedef GrGLboolean (* GrGLUnmapBufferProc)(GrGLenum target);
183 typedef GrGLvoid (* GrGLUnmapBufferSubDataProc)(const GrGLvoid* mem);
184 typedef GrGLvoid (* GrGLUnmapTexSubImage2DProc)(const GrGLvoid* mem);
185 typedef GrGLvoid (* GrGLUseProgramProc)(GrGLuint program);
186 typedef GrGLvoid (* GrGLVertexAttrib1fProc)(GrGLuint indx, const GrGLfloat value);
187 typedef GrGLvoid (* GrGLVertexAttrib2fvProc)(GrGLuint indx, const GrGLfloat* values);
188 typedef GrGLvoid (* GrGLVertexAttrib3fvProc)(GrGLuint indx, const GrGLfloat* values);
189 typedef GrGLvoid (* GrGLVertexAttrib4fvProc)(GrGLuint indx, const GrGLfloat* values);
190 typedef GrGLvoid (* GrGLVertexAttribDivisorProc)(GrGLuint index, GrGLuint divisor);
191 typedef GrGLvoid (* GrGLVertexAttribIPointerProc)(GrGLuint indx, GrGLint size, GrGLenum type, GrGLsizei stride, const GrGLvoid* ptr);
192 typedef GrGLvoid (* GrGLVertexAttribPointerProc)(GrGLuint indx, GrGLint size, GrGLenum type, GrGLboolean normalized, GrGLsizei stride, const GrGLvoid* ptr);
193 typedef GrGLvoid (* GrGLViewportProc)(GrGLint x, GrGLint y, GrGLsizei width, GrGLsizei height);
194 
195 /* GL_NV_path_rendering */
196 typedef GrGLvoid (* GrGLMatrixLoadfProc)(GrGLenum matrixMode, const GrGLfloat* m);
197 typedef GrGLvoid (* GrGLMatrixLoadIdentityProc)(GrGLenum);
198 typedef GrGLvoid (* GrGLPathCommandsProc)(GrGLuint path, GrGLsizei numCommands, const GrGLubyte *commands, GrGLsizei numCoords, GrGLenum coordType, const GrGLvoid *coords);
199 typedef GrGLvoid (* GrGLPathParameteriProc)(GrGLuint path, GrGLenum pname, GrGLint value);
200 typedef GrGLvoid (* GrGLPathParameterfProc)(GrGLuint path, GrGLenum pname, GrGLfloat value);
201 typedef GrGLuint (* GrGLGenPathsProc)(GrGLsizei range);
202 typedef GrGLvoid (* GrGLDeletePathsProc)(GrGLuint path, GrGLsizei range);
203 typedef GrGLboolean (* GrGLIsPathProc)(GrGLuint path);
204 typedef GrGLvoid (* GrGLPathStencilFuncProc)(GrGLenum func, GrGLint ref, GrGLuint mask);
205 typedef GrGLvoid (* GrGLStencilFillPathProc)(GrGLuint path, GrGLenum fillMode, GrGLuint mask);
206 typedef GrGLvoid (* GrGLStencilStrokePathProc)(GrGLuint path, GrGLint reference, GrGLuint mask);
207 typedef GrGLvoid (* GrGLStencilFillPathInstancedProc)(GrGLsizei numPaths, GrGLenum pathNameType, const GrGLvoid *paths, GrGLuint pathBase, GrGLenum fillMode, GrGLuint mask, GrGLenum transformType, const GrGLfloat *transformValues);
208 typedef GrGLvoid (* GrGLStencilStrokePathInstancedProc)(GrGLsizei numPaths, GrGLenum pathNameType, const GrGLvoid *paths, GrGLuint pathBase, GrGLint reference, GrGLuint mask, GrGLenum transformType, const GrGLfloat *transformValues);
209 typedef GrGLvoid (* GrGLCoverFillPathProc)(GrGLuint path, GrGLenum coverMode);
210 typedef GrGLvoid (* GrGLCoverStrokePathProc)(GrGLuint name, GrGLenum coverMode);
211 typedef GrGLvoid (* GrGLCoverFillPathInstancedProc)(GrGLsizei numPaths, GrGLenum pathNameType, const GrGLvoid *paths, GrGLuint pathBase, GrGLenum coverMode, GrGLenum transformType, const GrGLfloat *transformValues);
212 typedef GrGLvoid (* GrGLCoverStrokePathInstancedProc)(GrGLsizei numPaths, GrGLenum pathNameType, const GrGLvoid *paths, GrGLuint pathBase, GrGLenum coverMode, GrGLenum transformType, const GrGLfloat* transformValues);
213 // NV_path_rendering v1.2
214 typedef GrGLvoid (* GrGLStencilThenCoverFillPathProc)(GrGLuint path, GrGLenum fillMode, GrGLuint mask, GrGLenum coverMode);
215 typedef GrGLvoid (* GrGLStencilThenCoverStrokePathProc)(GrGLuint path, GrGLint reference, GrGLuint mask, GrGLenum coverMode);
216 typedef GrGLvoid (* GrGLStencilThenCoverFillPathInstancedProc)(GrGLsizei numPaths, GrGLenum pathNameType, const GrGLvoid *paths, GrGLuint pathBase, GrGLenum fillMode, GrGLuint mask, GrGLenum coverMode, GrGLenum transformType, const GrGLfloat *transformValues);
217 typedef GrGLvoid (* GrGLStencilThenCoverStrokePathInstancedProc)(GrGLsizei numPaths, GrGLenum pathNameType, const GrGLvoid *paths, GrGLuint pathBase, GrGLint reference, GrGLuint mask, GrGLenum coverMode, GrGLenum transformType, const GrGLfloat *transformValues);
218 // NV_path_rendering v1.3
219 typedef GrGLvoid (* GrGLProgramPathFragmentInputGenProc)(GrGLuint program, GrGLint location, GrGLenum genMode, GrGLint components,const GrGLfloat *coeffs);
220 // CHROMIUM_path_rendering
221 typedef GrGLvoid (* GrGLBindFragmentInputLocationProc)(GrGLuint program, GrGLint location, const GrGLchar* name);
222 
223 /* ARB_program_interface_query */
224 typedef GrGLint (* GrGLGetProgramResourceLocationProc)(GrGLuint program, GrGLenum programInterface, const GrGLchar *name);
225 
226 /* GL_NV_framebuffer_mixed_samples */
227 typedef GrGLvoid (* GrGLCoverageModulationProc)(GrGLenum components);
228 
229 /* EXT_multi_draw_indirect */
230 typedef GrGLvoid (* GrGLMultiDrawArraysIndirectProc)(GrGLenum mode, const GrGLvoid *indirect, GrGLsizei drawcount, GrGLsizei stride);
231 typedef GrGLvoid (* GrGLMultiDrawElementsIndirectProc)(GrGLenum mode, GrGLenum type, const GrGLvoid *indirect, GrGLsizei drawcount, GrGLsizei stride);
232 
233 /* NV_bindless_texture */
234 typedef GrGLuint64 (* GrGLGetTextureHandleProc)(GrGLuint texture);
235 typedef GrGLuint64 (* GrGLGetTextureSamplerHandleProc)(GrGLuint texture, GrGLuint sampler);
236 typedef GrGLvoid (* GrGLMakeTextureHandleResidentProc)(GrGLuint64 handle);
237 typedef GrGLvoid (* GrGLMakeTextureHandleNonResidentProc)(GrGLuint64 handle);
238 typedef GrGLuint64 (* GrGLGetImageHandleProc)(GrGLuint texture, GrGLint level, GrGLboolean layered, GrGLint layer, GrGLint format);
239 typedef GrGLvoid (* GrGLMakeImageHandleResidentProc)(GrGLuint64 handle, GrGLenum access);
240 typedef GrGLvoid (* GrGLMakeImageHandleNonResidentProc)(GrGLuint64 handle);
241 typedef GrGLboolean (* GrGLIsTextureHandleResidentProc)(GrGLuint64 handle);
242 typedef GrGLboolean (* GrGLIsImageHandleResidentProc)(GrGLuint64 handle);
243 typedef GrGLvoid (* GrGLUniformHandleui64Proc)(GrGLint location, GrGLuint64 v0);
244 typedef GrGLvoid (* GrGLUniformHandleui64vProc)(GrGLint location, GrGLsizei count, const GrGLuint64 *value);
245 typedef GrGLvoid (* GrGLProgramUniformHandleui64Proc)(GrGLuint program, GrGLint location, GrGLuint64 v0);
246 typedef GrGLvoid (* GrGLProgramUniformHandleui64vProc)(GrGLuint program, GrGLint location, GrGLsizei count, const GrGLuint64 *value);
247 
248 /* ARB_sample_shading */
249 typedef GrGLvoid (* GrGLMinSampleShadingProc)(GrGLfloat value);
250 
251 /* EXT_direct_state_access */
252 // (In the future some of these methods may be omitted)
253 typedef GrGLvoid (* GrGLTextureParameteriProc)(GrGLuint texture, GrGLenum target, GrGLenum pname, GrGLint param);
254 typedef GrGLvoid (* GrGLTextureParameterivProc)(GrGLuint texture, GrGLenum target, GrGLenum pname, const GrGLint *param);
255 typedef GrGLvoid (* GrGLTextureParameterfProc)(GrGLuint texture, GrGLenum target, GrGLenum pname, float param);
256 typedef GrGLvoid (* GrGLTextureParameterfvProc)(GrGLuint texture, GrGLenum target, GrGLenum pname, const float *param);
257 typedef GrGLvoid (* GrGLTextureImage1DProc)(GrGLuint texture, GrGLenum target, GrGLint level, GrGLint GrGLinternalformat, GrGLsizei width, GrGLint border, GrGLenum format, GrGLenum type, const GrGLvoid *pixels);
258 typedef GrGLvoid (* GrGLTextureImage2DProc)(GrGLuint texture, GrGLenum target, GrGLint level, GrGLint GrGLinternalformat, GrGLsizei width, GrGLsizei height, GrGLint border, GrGLenum format, GrGLenum type, const GrGLvoid *pixels);
259 typedef GrGLvoid (* GrGLTextureSubImage1DProc)(GrGLuint texture, GrGLenum target, GrGLint level, GrGLint xoffset, GrGLsizei width, GrGLenum format, GrGLenum type, const GrGLvoid *pixels);
260 typedef GrGLvoid (* GrGLTextureSubImage2DProc)(GrGLuint texture, GrGLenum target, GrGLint level, GrGLint xoffset, GrGLint yoffset, GrGLsizei width, GrGLsizei height, GrGLenum format, GrGLenum type, const GrGLvoid *pixels);
261 typedef GrGLvoid (* GrGLCopyTextureImage1DProc)(GrGLuint texture, GrGLenum target, GrGLint level, GrGLenum GrGLinternalformat, GrGLint x, GrGLint y, GrGLsizei width, GrGLint border);
262 typedef GrGLvoid (* GrGLCopyTextureImage2DProc)(GrGLuint texture, GrGLenum target, GrGLint level, GrGLenum GrGLinternalformat, GrGLint x, GrGLint y, GrGLsizei width, GrGLsizei height, GrGLint border);
263 typedef GrGLvoid (* GrGLCopyTextureSubImage1DProc)(GrGLuint texture, GrGLenum target, GrGLint level, GrGLint xoffset, GrGLint x, GrGLint y, GrGLsizei width);
264 typedef GrGLvoid (* GrGLCopyTextureSubImage2DProc)(GrGLuint texture, GrGLenum target, GrGLint level, GrGLint xoffset, GrGLint yoffset, GrGLint x, GrGLint y, GrGLsizei width, GrGLsizei height);
265 typedef GrGLvoid (* GrGLGetTextureImageProc)(GrGLuint texture, GrGLenum target, GrGLint level, GrGLenum format, GrGLenum type, GrGLvoid *pixels);
266 typedef GrGLvoid (* GrGLGetTextureParameterfvProc)(GrGLuint texture, GrGLenum target, GrGLenum pname, float *params);
267 typedef GrGLvoid (* GrGLGetTextureParameterivProc)(GrGLuint texture, GrGLenum target, GrGLenum pname, GrGLint *params);
268 typedef GrGLvoid (* GrGLGetTextureLevelParameterfvProc)(GrGLuint texture, GrGLenum target, GrGLint level, GrGLenum pname, float *params);
269 typedef GrGLvoid (* GrGLGetTextureLevelParameterivProc)(GrGLuint texture, GrGLenum target, GrGLint level, GrGLenum pname, GrGLint *params);
270 // OpenGL 1.2
271 typedef GrGLvoid (* GrGLTextureImage3DProc)(GrGLuint texture, GrGLenum target, GrGLint level, GrGLint GrGLinternalformat, GrGLsizei width, GrGLsizei height, GrGLsizei depth, GrGLint border, GrGLenum format, GrGLenum type, const GrGLvoid *pixels);
272 typedef GrGLvoid (* 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);
273 typedef GrGLvoid (* GrGLCopyTextureSubImage3DProc)(GrGLuint texture, GrGLenum target, GrGLint level, GrGLint xoffset, GrGLint yoffset, GrGLint zoffset, GrGLint x, GrGLint y, GrGLsizei width, GrGLsizei height);
274 typedef GrGLvoid (* GrGLCompressedTextureImage3DProc)(GrGLuint texture, GrGLenum target, GrGLint level, GrGLenum GrGLinternalformat, GrGLsizei width, GrGLsizei height, GrGLsizei depth, GrGLint border, GrGLsizei imageSize, const GrGLvoid *data);
275 typedef GrGLvoid (* GrGLCompressedTextureImage2DProc)(GrGLuint texture, GrGLenum target, GrGLint level, GrGLenum GrGLinternalformat, GrGLsizei width, GrGLsizei height, GrGLint border, GrGLsizei imageSize, const GrGLvoid *data);
276 typedef GrGLvoid (* GrGLCompressedTextureImage1DProc)(GrGLuint texture, GrGLenum target, GrGLint level, GrGLenum GrGLinternalformat, GrGLsizei width, GrGLint border, GrGLsizei imageSize, const GrGLvoid *data);
277 typedef GrGLvoid (* 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);
278 typedef GrGLvoid (* GrGLCompressedTextureSubImage2DProc)(GrGLuint texture, GrGLenum target, GrGLint level, GrGLint xoffset, GrGLint yoffset, GrGLsizei width, GrGLsizei height, GrGLenum format, GrGLsizei imageSize, const GrGLvoid *data);
279 typedef GrGLvoid (* GrGLCompressedTextureSubImage1DProc)(GrGLuint texture, GrGLenum target, GrGLint level, GrGLint xoffset, GrGLsizei width, GrGLenum format, GrGLsizei imageSize, const GrGLvoid *data);
280 typedef GrGLvoid (* GrGLGetCompressedTextureImageProc)(GrGLuint texture, GrGLenum target, GrGLint level, GrGLvoid *img);
281 // OpenGL 1.5
282 typedef GrGLvoid (* GrGLNamedBufferDataProc)(GrGLuint buffer, GrGLsizeiptr size, const GrGLvoid *data, GrGLenum usage);
283 typedef GrGLvoid (* GrGLNamedBufferSubDataProc)(GrGLuint buffer, GrGLintptr offset, GrGLsizeiptr size, const GrGLvoid *data);
284 typedef GrGLvoid* (* GrGLMapNamedBufferProc)(GrGLuint buffer, GrGLenum access);
285 typedef GrGLboolean (* GrGLUnmapNamedBufferProc)(GrGLuint buffer);
286 typedef GrGLvoid (* GrGLGetNamedBufferParameterivProc)(GrGLuint buffer, GrGLenum pname, GrGLint *params);
287 typedef GrGLvoid (* GrGLGetNamedBufferPointervProc)(GrGLuint buffer, GrGLenum pname, GrGLvoid* *params);
288 typedef GrGLvoid (* GrGLGetNamedBufferSubDataProc)(GrGLuint buffer, GrGLintptr offset, GrGLsizeiptr size, GrGLvoid *data);
289 // OpenGL 2.0
290 typedef GrGLvoid (* GrGLProgramUniform1fProc)(GrGLuint program, GrGLint location, float v0);
291 typedef GrGLvoid (* GrGLProgramUniform2fProc)(GrGLuint program, GrGLint location, float v0, float v1);
292 typedef GrGLvoid (* GrGLProgramUniform3fProc)(GrGLuint program, GrGLint location, float v0, float v1, float v2);
293 typedef GrGLvoid (* GrGLProgramUniform4fProc)(GrGLuint program, GrGLint location, float v0, float v1, float v2, float v3);
294 typedef GrGLvoid (* GrGLProgramUniform1iProc)(GrGLuint program, GrGLint location, GrGLint v0);
295 typedef GrGLvoid (* GrGLProgramUniform2iProc)(GrGLuint program, GrGLint location, GrGLint v0, GrGLint v1);
296 typedef GrGLvoid (* GrGLProgramUniform3iProc)(GrGLuint program, GrGLint location, GrGLint v0, GrGLint v1, GrGLint v2);
297 typedef GrGLvoid (* GrGLProgramUniform4iProc)(GrGLuint program, GrGLint location, GrGLint v0, GrGLint v1, GrGLint v2, GrGLint v3);
298 typedef GrGLvoid (* GrGLProgramUniform1fvProc)(GrGLuint program, GrGLint location, GrGLsizei count, const float *value);
299 typedef GrGLvoid (* GrGLProgramUniform2fvProc)(GrGLuint program, GrGLint location, GrGLsizei count, const float *value);
300 typedef GrGLvoid (* GrGLProgramUniform3fvProc)(GrGLuint program, GrGLint location, GrGLsizei count, const float *value);
301 typedef GrGLvoid (* GrGLProgramUniform4fvProc)(GrGLuint program, GrGLint location, GrGLsizei count, const float *value);
302 typedef GrGLvoid (* GrGLProgramUniform1ivProc)(GrGLuint program, GrGLint location, GrGLsizei count, const GrGLint *value);
303 typedef GrGLvoid (* GrGLProgramUniform2ivProc)(GrGLuint program, GrGLint location, GrGLsizei count, const GrGLint *value);
304 typedef GrGLvoid (* GrGLProgramUniform3ivProc)(GrGLuint program, GrGLint location, GrGLsizei count, const GrGLint *value);
305 typedef GrGLvoid (* GrGLProgramUniform4ivProc)(GrGLuint program, GrGLint location, GrGLsizei count, const GrGLint *value);
306 typedef GrGLvoid (* GrGLProgramUniformMatrix2fvProc)(GrGLuint program, GrGLint location, GrGLsizei count, GrGLboolean transpose, const float *value);
307 typedef GrGLvoid (* GrGLProgramUniformMatrix3fvProc)(GrGLuint program, GrGLint location, GrGLsizei count, GrGLboolean transpose, const float *value);
308 typedef GrGLvoid (* GrGLProgramUniformMatrix4fvProc)(GrGLuint program, GrGLint location, GrGLsizei count, GrGLboolean transpose, const float *value);
309 // OpenGL 2.1
310 typedef GrGLvoid (* GrGLProgramUniformMatrix2x3fvProc)(GrGLuint program, GrGLint location, GrGLsizei count, GrGLboolean transpose, const float *value);
311 typedef GrGLvoid (* GrGLProgramUniformMatrix3x2fvProc)(GrGLuint program, GrGLint location, GrGLsizei count, GrGLboolean transpose, const float *value);
312 typedef GrGLvoid (* GrGLProgramUniformMatrix2x4fvProc)(GrGLuint program, GrGLint location, GrGLsizei count, GrGLboolean transpose, const float *value);
313 typedef GrGLvoid (* GrGLProgramUniformMatrix4x2fvProc)(GrGLuint program, GrGLint location, GrGLsizei count, GrGLboolean transpose, const float *value);
314 typedef GrGLvoid (* GrGLProgramUniformMatrix3x4fvProc)(GrGLuint program, GrGLint location, GrGLsizei count, GrGLboolean transpose, const float *value);
315 typedef GrGLvoid (* GrGLProgramUniformMatrix4x3fvProc)(GrGLuint program, GrGLint location, GrGLsizei count, GrGLboolean transpose, const float *value);
316 // OpenGL 3.0
317 typedef GrGLvoid (* GrGLNamedRenderbufferStorageProc)(GrGLuint renderbuffer, GrGLenum GrGLinternalformat, GrGLsizei width, GrGLsizei height);
318 typedef GrGLvoid (* GrGLGetNamedRenderbufferParameterivProc)(GrGLuint renderbuffer, GrGLenum pname, GrGLint *params);
319 typedef GrGLvoid (* GrGLNamedRenderbufferStorageMultisampleProc)(GrGLuint renderbuffer, GrGLsizei samples, GrGLenum GrGLinternalformat, GrGLsizei width, GrGLsizei height);
320 typedef GrGLenum (* GrGLCheckNamedFramebufferStatusProc)(GrGLuint framebuffer, GrGLenum target);
321 typedef GrGLvoid (* GrGLNamedFramebufferTexture1DProc)(GrGLuint framebuffer, GrGLenum attachment, GrGLenum textarget, GrGLuint texture, GrGLint level);
322 typedef GrGLvoid (* GrGLNamedFramebufferTexture2DProc)(GrGLuint framebuffer, GrGLenum attachment, GrGLenum textarget, GrGLuint texture, GrGLint level);
323 typedef GrGLvoid (* GrGLNamedFramebufferTexture3DProc)(GrGLuint framebuffer, GrGLenum attachment, GrGLenum textarget, GrGLuint texture, GrGLint level, GrGLint zoffset);
324 typedef GrGLvoid (* GrGLNamedFramebufferRenderbufferProc)(GrGLuint framebuffer, GrGLenum attachment, GrGLenum renderbuffertarget, GrGLuint renderbuffer);
325 typedef GrGLvoid (* GrGLGetNamedFramebufferAttachmentParameterivProc)(GrGLuint framebuffer, GrGLenum attachment, GrGLenum pname, GrGLint *params);
326 typedef GrGLvoid (* GrGLGenerateTextureMipmapProc)(GrGLuint texture, GrGLenum target);
327 typedef GrGLvoid (* GrGLFramebufferDrawBufferProc)(GrGLuint framebuffer, GrGLenum mode);
328 typedef GrGLvoid (* GrGLFramebufferDrawBuffersProc)(GrGLuint framebuffer, GrGLsizei n, const GrGLenum *bufs);
329 typedef GrGLvoid (* GrGLFramebufferReadBufferProc)(GrGLuint framebuffer, GrGLenum mode);
330 typedef GrGLvoid (* GrGLGetFramebufferParameterivProc)(GrGLuint framebuffer, GrGLenum pname, GrGLint *param);
331 typedef GrGLvoid (* GrGLNamedCopyBufferSubDataProc)(GrGLuint readBuffer, GrGLuint writeBuffer, GrGLintptr readOffset, GrGLintptr writeOffset, GrGLsizeiptr size);
332 typedef GrGLvoid (* GrGLVertexArrayVertexOffsetProc)(GrGLuint vaobj, GrGLuint buffer, GrGLint size, GrGLenum type, GrGLsizei stride, GrGLintptr offset);
333 typedef GrGLvoid (* GrGLVertexArrayColorOffsetProc)(GrGLuint vaobj, GrGLuint buffer, GrGLint size, GrGLenum type, GrGLsizei stride, GrGLintptr offset);
334 typedef GrGLvoid (* GrGLVertexArrayEdgeFlagOffsetProc)(GrGLuint vaobj, GrGLuint buffer, GrGLsizei stride, GrGLintptr offset);
335 typedef GrGLvoid (* GrGLVertexArrayIndexOffsetProc)(GrGLuint vaobj, GrGLuint buffer, GrGLenum type, GrGLsizei stride, GrGLintptr offset);
336 typedef GrGLvoid (* GrGLVertexArrayNormalOffsetProc)(GrGLuint vaobj, GrGLuint buffer, GrGLenum type, GrGLsizei stride, GrGLintptr offset);
337 typedef GrGLvoid (* GrGLVertexArrayTexCoordOffsetProc)(GrGLuint vaobj, GrGLuint buffer, GrGLint size, GrGLenum type, GrGLsizei stride, GrGLintptr offset);
338 typedef GrGLvoid (* GrGLVertexArrayMultiTexCoordOffsetProc)(GrGLuint vaobj, GrGLuint buffer, GrGLenum texunit, GrGLint size, GrGLenum type, GrGLsizei stride, GrGLintptr offset);
339 typedef GrGLvoid (* GrGLVertexArrayFogCoordOffsetProc)(GrGLuint vaobj, GrGLuint buffer, GrGLenum type, GrGLsizei stride, GrGLintptr offset);
340 typedef GrGLvoid (* GrGLVertexArraySecondaryColorOffsetProc)(GrGLuint vaobj, GrGLuint buffer, GrGLint size, GrGLenum type, GrGLsizei stride, GrGLintptr offset);
341 typedef GrGLvoid (* GrGLVertexArrayVertexAttribOffsetProc)(GrGLuint vaobj, GrGLuint buffer, GrGLuint index, GrGLint size, GrGLenum type, GrGLboolean normalized, GrGLsizei stride, GrGLintptr offset);
342 typedef GrGLvoid (* GrGLVertexArrayVertexAttribIOffsetProc)(GrGLuint vaobj, GrGLuint buffer, GrGLuint index, GrGLint size, GrGLenum type, GrGLsizei stride, GrGLintptr offset);
343 typedef GrGLvoid (* GrGLEnableVertexArrayProc)(GrGLuint vaobj, GrGLenum array);
344 typedef GrGLvoid (* GrGLDisableVertexArrayProc)(GrGLuint vaobj, GrGLenum array);
345 typedef GrGLvoid (* GrGLEnableVertexArrayAttribProc)(GrGLuint vaobj, GrGLuint index);
346 typedef GrGLvoid (* GrGLDisableVertexArrayAttribProc)(GrGLuint vaobj, GrGLuint index);
347 typedef GrGLvoid (* GrGLGetVertexArrayIntegervProc)(GrGLuint vaobj, GrGLenum pname, GrGLint *param);
348 typedef GrGLvoid (* GrGLGetVertexArrayPointervProc)(GrGLuint vaobj, GrGLenum pname, GrGLvoid **param);
349 typedef GrGLvoid (* GrGLGetVertexArrayIntegeri_vProc)(GrGLuint vaobj, GrGLuint index, GrGLenum pname, GrGLint *param);
350 typedef GrGLvoid (* GrGLGetVertexArrayPointeri_vProc)(GrGLuint vaobj, GrGLuint index, GrGLenum pname, GrGLvoid **param);
351 typedef GrGLvoid* (* GrGLMapNamedBufferRangeProc)(GrGLuint buffer, GrGLintptr offset, GrGLsizeiptr length, GrGLbitfield access);
352 typedef GrGLvoid (* GrGLFlushMappedNamedBufferRangeProc)(GrGLuint buffer, GrGLintptr offset, GrGLsizeiptr length);
353 // OpenGL 3.1
354 typedef GrGLvoid (* GrGLTextureBufferProc)(GrGLuint texture, GrGLenum target, GrGLenum internalformat, GrGLuint buffer);
355 
356 /* ARB_sync */
357 typedef GrGLsync (* GrGLFenceSyncProc)(GrGLenum condition, GrGLbitfield flags);
358 typedef GrGLboolean (* GrGLIsSyncProc)(GrGLsync sync);
359 typedef GrGLenum (* GrGLClientWaitSyncProc)(GrGLsync sync, GrGLbitfield flags, GrGLuint64 timeout);
360 typedef GrGLvoid (* GrGLWaitSyncProc)(GrGLsync sync, GrGLbitfield flags, GrGLuint64 timeout);
361 typedef GrGLvoid (* GrGLDeleteSyncProc)(GrGLsync sync);
362 
363 /* ARB_internalformat_query */
364 typedef GrGLvoid (* GrGLGetInternalformativProc)(GrGLenum target, GrGLenum internalformat, GrGLenum pname, GrGLsizei bufSize, GrGLint *params);
365 
366 /* KHR_debug */
367 typedef GrGLvoid (* GrGLDebugMessageControlProc)(GrGLenum source, GrGLenum type, GrGLenum severity, GrGLsizei count, const GrGLuint* ids, GrGLboolean enabled);
368 typedef GrGLvoid (* GrGLDebugMessageInsertProc)(GrGLenum source, GrGLenum type, GrGLuint id, GrGLenum severity, GrGLsizei length,  const GrGLchar* buf);
369 typedef GrGLvoid (* GrGLDebugMessageCallbackProc)(GRGLDEBUGPROC callback, const GrGLvoid* userParam);
370 typedef GrGLuint (* GrGLGetDebugMessageLogProc)(GrGLuint count, GrGLsizei bufSize, GrGLenum* sources, GrGLenum* types, GrGLuint* ids, GrGLenum* severities, GrGLsizei* lengths,  GrGLchar* messageLog);
371 typedef GrGLvoid (* GrGLPushDebugGroupProc)(GrGLenum source, GrGLuint id, GrGLsizei length,  const GrGLchar * message);
372 typedef GrGLvoid (* GrGLPopDebugGroupProc)();
373 typedef GrGLvoid (* GrGLObjectLabelProc)(GrGLenum identifier, GrGLuint name, GrGLsizei length, const GrGLchar *label);
374 
375 /** EXT_window_rectangles */
376 typedef GrGLvoid (* GrGLWindowRectanglesProc)(GrGLenum mode, GrGLsizei count, const GrGLint box[]);
377 
378 /** EGL functions */
379 typedef const char* (* GrEGLQueryStringProc)(GrEGLDisplay dpy, GrEGLint name);
380 typedef GrEGLDisplay (* GrEGLGetCurrentDisplayProc)();
381 typedef GrEGLImage (* GrEGLCreateImageProc)(GrEGLDisplay dpy, GrEGLContext ctx, GrEGLenum target, GrEGLClientBuffer buffer, const GrEGLint *attrib_list);
382 typedef GrEGLBoolean (* GrEGLDestroyImageProc)(GrEGLDisplay dpy, GrEGLImage image);
383 }  // extern "C"
384 
385 // This is a lighter-weight std::function, trying to reduce code size and compile time
386 // by only supporting the exact use cases we require.
387 template <typename T> class GrGLFunction;
388 
389 template <typename R, typename... Args>
390 class GrGLFunction<R(*)(Args...)>{
391 public:
392     // Construct empty.
GrGLFunction()393     GrGLFunction() : fCall(nullptr) {}
GrGLFunction(std::nullptr_t)394     GrGLFunction(std::nullptr_t) : GrGLFunction() {}
395 
396     // Construct from a simple function pointer.
GrGLFunction(R (GR_GL_FUNCTION_TYPE * fn_ptr)(Args...))397     GrGLFunction(R (GR_GL_FUNCTION_TYPE* fn_ptr)(Args...)) : GrGLFunction() {
398         if (fn_ptr) {
399             memcpy(fBuf, &fn_ptr, sizeof(fn_ptr));
400             fCall = [](const void* buf, Args... args) {
401                 auto fn_ptr = *(R (GR_GL_FUNCTION_TYPE**)(Args...))buf;
402                 return fn_ptr(args...);
403             };
404         }
405     }
406 
407     // Construct from a small closure.
408     template <typename Closure>
GrGLFunction(Closure closure)409     GrGLFunction(Closure closure) : GrGLFunction() {
410         static_assert(sizeof(Closure) <= sizeof(fBuf), "fBuf is too small");
411     #if defined(__APPLE__)   // I am having serious trouble getting these to work with all STLs...
412         static_assert(std::is_trivially_copyable<Closure>::value, "");
413         static_assert(std::is_trivially_destructible<Closure>::value, "");
414     #endif
415 
416         memcpy(fBuf, &closure, sizeof(closure));
417         fCall = [](const void* buf, Args... args) {
418             auto closure = (const Closure*)buf;
419             return (*closure)(args...);
420         };
421     }
422 
operator()423     R operator()(Args... args) const {
424         SkASSERT(fCall);
425         return fCall(fBuf, args...);
426     }
427 
428     explicit operator bool() const {
429         return fCall != nullptr;
430     }
431 
432 private:
433     R (*fCall)(const void*, Args...);
434     size_t fBuf[4];
435 };
436 
437 #endif
438