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
15extern "C" {
16
17///////////////////////////////////////////////////////////////////////////////
18
19typedef GrGLvoid (* GrGLActiveTextureProc)(GrGLenum texture);
20typedef GrGLvoid (* GrGLAttachShaderProc)(GrGLuint program, GrGLuint shader);
21typedef GrGLvoid (* GrGLBeginQueryProc)(GrGLenum target, GrGLuint id);
22typedef GrGLvoid (* GrGLBindAttribLocationProc)(GrGLuint program, GrGLuint index, const char* name);
23typedef GrGLvoid (* GrGLBindBufferProc)(GrGLenum target, GrGLuint buffer);
24typedef GrGLvoid (* GrGLBindFramebufferProc)(GrGLenum target, GrGLuint framebuffer);
25typedef GrGLvoid (* GrGLBindRenderbufferProc)(GrGLenum target, GrGLuint renderbuffer);
26typedef GrGLvoid (* GrGLBindTextureProc)(GrGLenum target, GrGLuint texture);
27typedef GrGLvoid (* GrGLBindFragDataLocationProc)(GrGLuint program, GrGLuint colorNumber, const GrGLchar* name);
28typedef GrGLvoid (* GrGLBindFragDataLocationIndexedProc)(GrGLuint program, GrGLuint colorNumber, GrGLuint index, const GrGLchar * name);
29typedef GrGLvoid (* GrGLBindVertexArrayProc)(GrGLuint array);
30typedef GrGLvoid (* GrGLBlendBarrierProc)();
31typedef GrGLvoid (* GrGLBlendColorProc)(GrGLclampf red, GrGLclampf green, GrGLclampf blue, GrGLclampf alpha);
32typedef GrGLvoid (* GrGLBlendEquationProc)(GrGLenum mode);
33typedef GrGLvoid (* GrGLBlendFuncProc)(GrGLenum sfactor, GrGLenum dfactor);
34typedef GrGLvoid (* GrGLBlitFramebufferProc)(GrGLint srcX0, GrGLint srcY0, GrGLint srcX1, GrGLint srcY1, GrGLint dstX0, GrGLint dstY0, GrGLint dstX1, GrGLint dstY1, GrGLbitfield mask, GrGLenum filter);
35typedef GrGLvoid (* GrGLBufferDataProc)(GrGLenum target, GrGLsizeiptr size, const GrGLvoid* data, GrGLenum usage);
36typedef GrGLvoid (* GrGLBufferSubDataProc)(GrGLenum target, GrGLintptr offset, GrGLsizeiptr size, const GrGLvoid* data);
37typedef GrGLenum (* GrGLCheckFramebufferStatusProc)(GrGLenum target);
38typedef GrGLvoid (* GrGLClearProc)(GrGLbitfield mask);
39typedef GrGLvoid (* GrGLClearColorProc)(GrGLclampf red, GrGLclampf green, GrGLclampf blue, GrGLclampf alpha);
40typedef GrGLvoid (* GrGLClearStencilProc)(GrGLint s);
41typedef GrGLvoid (* GrGLClearTexImageProc)(GrGLuint texture, GrGLint level, GrGLenum format, GrGLenum type,const GrGLvoid * data);
42typedef 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);
43typedef GrGLvoid (* GrGLColorMaskProc)(GrGLboolean red, GrGLboolean green, GrGLboolean blue, GrGLboolean alpha);
44typedef GrGLvoid (* GrGLCompileShaderProc)(GrGLuint shader);
45typedef GrGLvoid (* GrGLCompressedTexImage2DProc)(GrGLenum target, GrGLint level, GrGLenum internalformat, GrGLsizei width, GrGLsizei height, GrGLint border, GrGLsizei imageSize, const GrGLvoid* data);
46typedef GrGLvoid (* GrGLCompressedTexSubImage2DProc)(GrGLenum target, GrGLint level, GrGLint xoffset, GrGLint yoffset, GrGLsizei width, GrGLsizei height, GrGLenum format, GrGLsizei imageSize, const GrGLvoid* data);
47typedef GrGLvoid (* GrGLCopyTexSubImage2DProc)(GrGLenum target, GrGLint level, GrGLint xoffset, GrGLint yoffset, GrGLint x, GrGLint y, GrGLsizei width, GrGLsizei height);
48typedef GrGLuint (* GrGLCreateProgramProc)();
49typedef GrGLuint (* GrGLCreateShaderProc)(GrGLenum type);
50typedef GrGLvoid (* GrGLCullFaceProc)(GrGLenum mode);
51typedef GrGLvoid (* GrGLDeleteBuffersProc)(GrGLsizei n, const GrGLuint* buffers);
52typedef GrGLvoid (* GrGLDeleteFramebuffersProc)(GrGLsizei n, const GrGLuint *framebuffers);
53typedef GrGLvoid (* GrGLDeleteProgramProc)(GrGLuint program);
54typedef GrGLvoid (* GrGLDeleteQueriesProc)(GrGLsizei n, const GrGLuint *ids);
55typedef GrGLvoid (* GrGLDeleteRenderbuffersProc)(GrGLsizei n, const GrGLuint *renderbuffers);
56typedef GrGLvoid (* GrGLDeleteShaderProc)(GrGLuint shader);
57typedef GrGLvoid (* GrGLDeleteTexturesProc)(GrGLsizei n, const GrGLuint* textures);
58typedef GrGLvoid (* GrGLDeleteVertexArraysProc)(GrGLsizei n, const GrGLuint *arrays);
59typedef GrGLvoid (* GrGLDepthMaskProc)(GrGLboolean flag);
60typedef GrGLvoid (* GrGLDisableProc)(GrGLenum cap);
61typedef GrGLvoid (* GrGLDisableVertexAttribArrayProc)(GrGLuint index);
62typedef GrGLvoid (* GrGLDrawArraysProc)(GrGLenum mode, GrGLint first, GrGLsizei count);
63typedef GrGLvoid (* GrGLDrawArraysInstancedProc)(GrGLenum mode, GrGLint first, GrGLsizei count, GrGLsizei primcount);
64typedef GrGLvoid (* GrGLDrawArraysIndirectProc)(GrGLenum mode, const GrGLvoid* indirect);
65typedef GrGLvoid (* GrGLDrawBufferProc)(GrGLenum mode);
66typedef GrGLvoid (* GrGLDrawBuffersProc)(GrGLsizei n, const GrGLenum* bufs);
67typedef GrGLvoid (* GrGLDrawElementsProc)(GrGLenum mode, GrGLsizei count, GrGLenum type, const GrGLvoid* indices);
68typedef GrGLvoid (* GrGLDrawElementsInstancedProc)(GrGLenum mode, GrGLsizei count, GrGLenum type, const GrGLvoid *indices, GrGLsizei primcount);
69typedef GrGLvoid (* GrGLDrawElementsIndirectProc)(GrGLenum mode, GrGLenum type, const GrGLvoid* indirect);
70typedef GrGLvoid (* GrGLDrawRangeElementsProc)(GrGLenum mode, GrGLuint start, GrGLuint end, GrGLsizei count, GrGLenum type, const GrGLvoid* indices);
71typedef GrGLvoid (* GrGLEnableProc)(GrGLenum cap);
72typedef GrGLvoid (* GrGLEnableVertexAttribArrayProc)(GrGLuint index);
73typedef GrGLvoid (* GrGLEndQueryProc)(GrGLenum target);
74typedef GrGLvoid (* GrGLFinishProc)();
75typedef GrGLvoid (* GrGLFlushProc)();
76typedef GrGLvoid (* GrGLFlushMappedBufferRangeProc)(GrGLenum target, GrGLintptr offset, GrGLsizeiptr length);
77typedef GrGLvoid (* GrGLFramebufferRenderbufferProc)(GrGLenum target, GrGLenum attachment, GrGLenum renderbuffertarget, GrGLuint renderbuffer);
78typedef GrGLvoid (* GrGLFramebufferTexture2DProc)(GrGLenum target, GrGLenum attachment, GrGLenum textarget, GrGLuint texture, GrGLint level);
79typedef GrGLvoid (* GrGLFramebufferTexture2DMultisampleProc)(GrGLenum target, GrGLenum attachment, GrGLenum textarget, GrGLuint texture, GrGLint level, GrGLsizei samples);
80typedef GrGLvoid (* GrGLFrontFaceProc)(GrGLenum mode);
81typedef GrGLvoid (* GrGLGenBuffersProc)(GrGLsizei n, GrGLuint* buffers);
82typedef GrGLvoid (* GrGLGenFramebuffersProc)(GrGLsizei n, GrGLuint *framebuffers);
83typedef GrGLvoid (* GrGLGenerateMipmapProc)(GrGLenum target);
84typedef GrGLvoid (* GrGLGenQueriesProc)(GrGLsizei n, GrGLuint *ids);
85typedef GrGLvoid (* GrGLGenRenderbuffersProc)(GrGLsizei n, GrGLuint *renderbuffers);
86typedef GrGLvoid (* GrGLGenTexturesProc)(GrGLsizei n, GrGLuint* textures);
87typedef GrGLvoid (* GrGLGenVertexArraysProc)(GrGLsizei n, GrGLuint *arrays);
88typedef GrGLvoid (* GrGLGetBufferParameterivProc)(GrGLenum target, GrGLenum pname, GrGLint* params);
89typedef GrGLenum (* GrGLGetErrorProc)();
90typedef GrGLvoid (* GrGLGetFramebufferAttachmentParameterivProc)(GrGLenum target, GrGLenum attachment, GrGLenum pname, GrGLint* params);
91typedef GrGLvoid (* GrGLGetIntegervProc)(GrGLenum pname, GrGLint* params);
92typedef GrGLvoid (* GrGLGetMultisamplefvProc)(GrGLenum pname, GrGLuint index, GrGLfloat* val);
93typedef GrGLvoid (* GrGLGetProgramBinaryProc)(GrGLuint program, GrGLsizei bufsize, GrGLsizei* length, GrGLenum *binaryFormat, void *binary);
94typedef GrGLvoid (* GrGLGetProgramInfoLogProc)(GrGLuint program, GrGLsizei bufsize, GrGLsizei* length, char* infolog);
95typedef GrGLvoid (* GrGLGetProgramivProc)(GrGLuint program, GrGLenum pname, GrGLint* params);
96typedef GrGLvoid (* GrGLGetQueryivProc)(GrGLenum GLtarget, GrGLenum pname, GrGLint *params);
97typedef GrGLvoid (* GrGLGetQueryObjecti64vProc)(GrGLuint id, GrGLenum pname, GrGLint64 *params);
98typedef GrGLvoid (* GrGLGetQueryObjectivProc)(GrGLuint id, GrGLenum pname, GrGLint *params);
99typedef GrGLvoid (* GrGLGetQueryObjectui64vProc)(GrGLuint id, GrGLenum pname, GrGLuint64 *params);
100typedef GrGLvoid (* GrGLGetQueryObjectuivProc)(GrGLuint id, GrGLenum pname, GrGLuint *params);
101typedef GrGLvoid (* GrGLGetRenderbufferParameterivProc)(GrGLenum target, GrGLenum pname, GrGLint* params);
102typedef GrGLvoid (* GrGLGetShaderInfoLogProc)(GrGLuint shader, GrGLsizei bufsize, GrGLsizei* length, char* infolog);
103typedef GrGLvoid (* GrGLGetShaderivProc)(GrGLuint shader, GrGLenum pname, GrGLint* params);
104typedef GrGLvoid (* GrGLGetShaderPrecisionFormatProc)(GrGLenum shadertype, GrGLenum precisiontype, GrGLint *range, GrGLint *precision);
105typedef const GrGLubyte* (* GrGLGetStringProc)(GrGLenum name);
106typedef const GrGLubyte* (* GrGLGetStringiProc)(GrGLenum name, GrGLuint index);
107typedef GrGLvoid (* GrGLGetTexLevelParameterivProc)(GrGLenum target, GrGLint level, GrGLenum pname, GrGLint* params);
108typedef GrGLint (* GrGLGetUniformLocationProc)(GrGLuint program, const char* name);
109typedef GrGLvoid (* GrGLInsertEventMarkerProc)(GrGLsizei length, const char* marker);
110typedef GrGLvoid (* GrGLInvalidateBufferDataProc)(GrGLuint buffer);
111typedef GrGLvoid (* GrGLInvalidateBufferSubDataProc)(GrGLuint buffer, GrGLintptr offset, GrGLsizeiptr length);
112typedef GrGLvoid (* GrGLInvalidateFramebufferProc)(GrGLenum target, GrGLsizei numAttachments,  const GrGLenum *attachments);
113typedef GrGLvoid (* GrGLInvalidateSubFramebufferProc)(GrGLenum target, GrGLsizei numAttachments, const GrGLenum *attachments, GrGLint x, GrGLint y, GrGLsizei width, GrGLsizei height);
114typedef GrGLvoid (* GrGLInvalidateTexImageProc)(GrGLuint texture, GrGLint level);
115typedef GrGLvoid (* GrGLInvalidateTexSubImageProc)(GrGLuint texture, GrGLint level, GrGLint xoffset, GrGLint yoffset, GrGLint zoffset, GrGLsizei width, GrGLsizei height, GrGLsizei depth);
116typedef GrGLboolean (* GrGLIsTextureProc)(GrGLuint texture);
117typedef GrGLvoid (* GrGLLineWidthProc)(GrGLfloat width);
118typedef GrGLvoid (* GrGLLinkProgramProc)(GrGLuint program);
119typedef GrGLvoid* (* GrGLMapBufferProc)(GrGLenum target, GrGLenum access);
120typedef GrGLvoid* (* GrGLMapBufferRangeProc)(GrGLenum target, GrGLintptr offset, GrGLsizeiptr length, GrGLbitfield access);
121typedef GrGLvoid* (* GrGLMapBufferSubDataProc)(GrGLuint target, GrGLintptr offset, GrGLsizeiptr size, GrGLenum access);
122typedef GrGLvoid* (* GrGLMapTexSubImage2DProc)(GrGLenum target, GrGLint level, GrGLint xoffset, GrGLint yoffset, GrGLsizei width, GrGLsizei height, GrGLenum format, GrGLenum type, GrGLenum access);
123typedef GrGLvoid (* GrGLPixelStoreiProc)(GrGLenum pname, GrGLint param);
124typedef GrGLvoid (* GrGLPolygonModeProc)(GrGLenum face, GrGLenum mode);
125typedef GrGLvoid (* GrGLPopGroupMarkerProc)();
126typedef GrGLvoid (* GrGLProgramBinaryProc)(GrGLuint program, GrGLenum binaryFormat, void *binary, GrGLsizei length);
127typedef GrGLvoid (* GrGLProgramParameteriProc)(GrGLuint program, GrGLenum pname, GrGLint value);
128typedef GrGLvoid (* GrGLPushGroupMarkerProc)(GrGLsizei length, const char* marker);
129typedef GrGLvoid (* GrGLQueryCounterProc)(GrGLuint id, GrGLenum target);
130typedef GrGLvoid (* GrGLRasterSamplesProc)(GrGLuint samples, GrGLboolean fixedsamplelocations);
131typedef GrGLvoid (* GrGLReadBufferProc)(GrGLenum src);
132typedef GrGLvoid (* GrGLReadPixelsProc)(GrGLint x, GrGLint y, GrGLsizei width, GrGLsizei height, GrGLenum format, GrGLenum type, GrGLvoid* pixels);
133typedef GrGLvoid (* GrGLRenderbufferStorageProc)(GrGLenum target, GrGLenum internalformat, GrGLsizei width, GrGLsizei height);
134typedef GrGLvoid (* GrGLRenderbufferStorageMultisampleProc)(GrGLenum target, GrGLsizei samples, GrGLenum internalformat, GrGLsizei width, GrGLsizei height);
135typedef GrGLvoid (* GrGLResolveMultisampleFramebufferProc)();
136typedef GrGLvoid (* GrGLScissorProc)(GrGLint x, GrGLint y, GrGLsizei width, GrGLsizei height);
137// GL_CHROMIUM_bind_uniform_location
138typedef GrGLvoid (* GrGLBindUniformLocationProc)(GrGLuint program, GrGLint location, const char* name);
139
140#if GR_GL_USE_NEW_SHADER_SOURCE_SIGNATURE
141typedef GrGLvoid (* GrGLShaderSourceProc)(GrGLuint shader, GrGLsizei count, const char* const * str, const GrGLint* length);
142#else
143typedef GrGLvoid (* GrGLShaderSourceProc)(GrGLuint shader, GrGLsizei count, const char** str, const GrGLint* length);
144#endif
145typedef GrGLvoid (* GrGLStencilFuncProc)(GrGLenum func, GrGLint ref, GrGLuint mask);
146typedef GrGLvoid (* GrGLStencilFuncSeparateProc)(GrGLenum face, GrGLenum func, GrGLint ref, GrGLuint mask);
147typedef GrGLvoid (* GrGLStencilMaskProc)(GrGLuint mask);
148typedef GrGLvoid (* GrGLStencilMaskSeparateProc)(GrGLenum face, GrGLuint mask);
149typedef GrGLvoid (* GrGLStencilOpProc)(GrGLenum fail, GrGLenum zfail, GrGLenum zpass);
150typedef GrGLvoid (* GrGLStencilOpSeparateProc)(GrGLenum face, GrGLenum fail, GrGLenum zfail, GrGLenum zpass);
151typedef GrGLvoid (* GrGLTexBufferProc)(GrGLenum target, GrGLenum internalformat, GrGLuint buffer);
152typedef GrGLvoid (* GrGLTexBufferRangeProc)(GrGLenum target, GrGLenum internalformat, GrGLuint buffer, GrGLintptr offset, GrGLsizeiptr size);
153typedef GrGLvoid (* GrGLTexImage2DProc)(GrGLenum target, GrGLint level, GrGLint internalformat, GrGLsizei width, GrGLsizei height, GrGLint border, GrGLenum format, GrGLenum type, const GrGLvoid* pixels);
154typedef GrGLvoid (* GrGLTexParameteriProc)(GrGLenum target, GrGLenum pname, GrGLint param);
155typedef GrGLvoid (* GrGLTexParameterivProc)(GrGLenum target, GrGLenum pname, const GrGLint* params);
156typedef GrGLvoid (* GrGLTexStorage2DProc)(GrGLenum target, GrGLsizei levels, GrGLenum internalformat, GrGLsizei width, GrGLsizei height);
157typedef GrGLvoid (* GrGLDiscardFramebufferProc)(GrGLenum target, GrGLsizei numAttachments, const GrGLenum* attachments);
158typedef GrGLvoid (* GrGLTexSubImage2DProc)(GrGLenum target, GrGLint level, GrGLint xoffset, GrGLint yoffset, GrGLsizei width, GrGLsizei height, GrGLenum format, GrGLenum type, const GrGLvoid* pixels);
159typedef GrGLvoid (* GrGLTextureBarrierProc)();
160typedef GrGLvoid (* GrGLUniform1fProc)(GrGLint location, GrGLfloat v0);
161typedef GrGLvoid (* GrGLUniform1iProc)(GrGLint location, GrGLint v0);
162typedef GrGLvoid (* GrGLUniform1fvProc)(GrGLint location, GrGLsizei count, const GrGLfloat* v);
163typedef GrGLvoid (* GrGLUniform1ivProc)(GrGLint location, GrGLsizei count, const GrGLint* v);
164typedef GrGLvoid (* GrGLUniform2fProc)(GrGLint location, GrGLfloat v0, GrGLfloat v1);
165typedef GrGLvoid (* GrGLUniform2iProc)(GrGLint location, GrGLint v0, GrGLint v1);
166typedef GrGLvoid (* GrGLUniform2fvProc)(GrGLint location, GrGLsizei count, const GrGLfloat* v);
167typedef GrGLvoid (* GrGLUniform2ivProc)(GrGLint location, GrGLsizei count, const GrGLint* v);
168typedef GrGLvoid (* GrGLUniform3fProc)(GrGLint location, GrGLfloat v0, GrGLfloat v1, GrGLfloat v2);
169typedef GrGLvoid (* GrGLUniform3iProc)(GrGLint location, GrGLint v0, GrGLint v1, GrGLint v2);
170typedef GrGLvoid (* GrGLUniform3fvProc)(GrGLint location, GrGLsizei count, const GrGLfloat* v);
171typedef GrGLvoid (* GrGLUniform3ivProc)(GrGLint location, GrGLsizei count, const GrGLint* v);
172typedef GrGLvoid (* GrGLUniform4fProc)(GrGLint location, GrGLfloat v0, GrGLfloat v1, GrGLfloat v2, GrGLfloat v3);
173typedef GrGLvoid (* GrGLUniform4iProc)(GrGLint location, GrGLint v0, GrGLint v1, GrGLint v2, GrGLint v3);
174typedef GrGLvoid (* GrGLUniform4fvProc)(GrGLint location, GrGLsizei count, const GrGLfloat* v);
175typedef GrGLvoid (* GrGLUniform4ivProc)(GrGLint location, GrGLsizei count, const GrGLint* v);
176typedef GrGLvoid (* GrGLUniformMatrix2fvProc)(GrGLint location, GrGLsizei count, GrGLboolean transpose, const GrGLfloat* value);
177typedef GrGLvoid (* GrGLUniformMatrix3fvProc)(GrGLint location, GrGLsizei count, GrGLboolean transpose, const GrGLfloat* value);
178typedef GrGLvoid (* GrGLUniformMatrix4fvProc)(GrGLint location, GrGLsizei count, GrGLboolean transpose, const GrGLfloat* value);
179typedef GrGLboolean (* GrGLUnmapBufferProc)(GrGLenum target);
180typedef GrGLvoid (* GrGLUnmapBufferSubDataProc)(const GrGLvoid* mem);
181typedef GrGLvoid (* GrGLUnmapTexSubImage2DProc)(const GrGLvoid* mem);
182typedef GrGLvoid (* GrGLUseProgramProc)(GrGLuint program);
183typedef GrGLvoid (* GrGLVertexAttrib1fProc)(GrGLuint indx, const GrGLfloat value);
184typedef GrGLvoid (* GrGLVertexAttrib2fvProc)(GrGLuint indx, const GrGLfloat* values);
185typedef GrGLvoid (* GrGLVertexAttrib3fvProc)(GrGLuint indx, const GrGLfloat* values);
186typedef GrGLvoid (* GrGLVertexAttrib4fvProc)(GrGLuint indx, const GrGLfloat* values);
187typedef GrGLvoid (* GrGLVertexAttribDivisorProc)(GrGLuint index, GrGLuint divisor);
188typedef GrGLvoid (* GrGLVertexAttribIPointerProc)(GrGLuint indx, GrGLint size, GrGLenum type, GrGLsizei stride, const GrGLvoid* ptr);
189typedef GrGLvoid (* GrGLVertexAttribPointerProc)(GrGLuint indx, GrGLint size, GrGLenum type, GrGLboolean normalized, GrGLsizei stride, const GrGLvoid* ptr);
190typedef GrGLvoid (* GrGLViewportProc)(GrGLint x, GrGLint y, GrGLsizei width, GrGLsizei height);
191
192/* GL_NV_path_rendering */
193typedef GrGLvoid (* GrGLMatrixLoadfProc)(GrGLenum matrixMode, const GrGLfloat* m);
194typedef GrGLvoid (* GrGLMatrixLoadIdentityProc)(GrGLenum);
195typedef GrGLvoid (* GrGLPathCommandsProc)(GrGLuint path, GrGLsizei numCommands, const GrGLubyte *commands, GrGLsizei numCoords, GrGLenum coordType, const GrGLvoid *coords);
196typedef GrGLvoid (* GrGLPathParameteriProc)(GrGLuint path, GrGLenum pname, GrGLint value);
197typedef GrGLvoid (* GrGLPathParameterfProc)(GrGLuint path, GrGLenum pname, GrGLfloat value);
198typedef GrGLuint (* GrGLGenPathsProc)(GrGLsizei range);
199typedef GrGLvoid (* GrGLDeletePathsProc)(GrGLuint path, GrGLsizei range);
200typedef GrGLboolean (* GrGLIsPathProc)(GrGLuint path);
201typedef GrGLvoid (* GrGLPathStencilFuncProc)(GrGLenum func, GrGLint ref, GrGLuint mask);
202typedef GrGLvoid (* GrGLStencilFillPathProc)(GrGLuint path, GrGLenum fillMode, GrGLuint mask);
203typedef GrGLvoid (* GrGLStencilStrokePathProc)(GrGLuint path, GrGLint reference, GrGLuint mask);
204typedef GrGLvoid (* GrGLStencilFillPathInstancedProc)(GrGLsizei numPaths, GrGLenum pathNameType, const GrGLvoid *paths, GrGLuint pathBase, GrGLenum fillMode, GrGLuint mask, GrGLenum transformType, const GrGLfloat *transformValues);
205typedef GrGLvoid (* GrGLStencilStrokePathInstancedProc)(GrGLsizei numPaths, GrGLenum pathNameType, const GrGLvoid *paths, GrGLuint pathBase, GrGLint reference, GrGLuint mask, GrGLenum transformType, const GrGLfloat *transformValues);
206typedef GrGLvoid (* GrGLCoverFillPathProc)(GrGLuint path, GrGLenum coverMode);
207typedef GrGLvoid (* GrGLCoverStrokePathProc)(GrGLuint name, GrGLenum coverMode);
208typedef GrGLvoid (* GrGLCoverFillPathInstancedProc)(GrGLsizei numPaths, GrGLenum pathNameType, const GrGLvoid *paths, GrGLuint pathBase, GrGLenum coverMode, GrGLenum transformType, const GrGLfloat *transformValues);
209typedef GrGLvoid (* GrGLCoverStrokePathInstancedProc)(GrGLsizei numPaths, GrGLenum pathNameType, const GrGLvoid *paths, GrGLuint pathBase, GrGLenum coverMode, GrGLenum transformType, const GrGLfloat* transformValues);
210// NV_path_rendering v1.2
211typedef GrGLvoid (* GrGLStencilThenCoverFillPathProc)(GrGLuint path, GrGLenum fillMode, GrGLuint mask, GrGLenum coverMode);
212typedef GrGLvoid (* GrGLStencilThenCoverStrokePathProc)(GrGLuint path, GrGLint reference, GrGLuint mask, GrGLenum coverMode);
213typedef GrGLvoid (* GrGLStencilThenCoverFillPathInstancedProc)(GrGLsizei numPaths, GrGLenum pathNameType, const GrGLvoid *paths, GrGLuint pathBase, GrGLenum fillMode, GrGLuint mask, GrGLenum coverMode, GrGLenum transformType, const GrGLfloat *transformValues);
214typedef GrGLvoid (* GrGLStencilThenCoverStrokePathInstancedProc)(GrGLsizei numPaths, GrGLenum pathNameType, const GrGLvoid *paths, GrGLuint pathBase, GrGLint reference, GrGLuint mask, GrGLenum coverMode, GrGLenum transformType, const GrGLfloat *transformValues);
215// NV_path_rendering v1.3
216typedef GrGLvoid (* GrGLProgramPathFragmentInputGenProc)(GrGLuint program, GrGLint location, GrGLenum genMode, GrGLint components,const GrGLfloat *coeffs);
217// CHROMIUM_path_rendering
218typedef GrGLvoid (* GrGLBindFragmentInputLocationProc)(GrGLuint program, GrGLint location, const GrGLchar* name);
219
220/* ARB_program_interface_query */
221typedef GrGLint (* GrGLGetProgramResourceLocationProc)(GrGLuint program, GrGLenum programInterface, const GrGLchar *name);
222
223/* GL_NV_framebuffer_mixed_samples */
224typedef GrGLvoid (* GrGLCoverageModulationProc)(GrGLenum components);
225
226/* EXT_multi_draw_indirect */
227typedef GrGLvoid (* GrGLMultiDrawArraysIndirectProc)(GrGLenum mode, const GrGLvoid *indirect, GrGLsizei drawcount, GrGLsizei stride);
228typedef GrGLvoid (* GrGLMultiDrawElementsIndirectProc)(GrGLenum mode, GrGLenum type, const GrGLvoid *indirect, GrGLsizei drawcount, GrGLsizei stride);
229
230/* ARB_sample_shading */
231typedef GrGLvoid (* GrGLMinSampleShadingProc)(GrGLfloat value);
232
233/* ARB_sync */
234typedef GrGLsync (* GrGLFenceSyncProc)(GrGLenum condition, GrGLbitfield flags);
235typedef GrGLboolean (* GrGLIsSyncProc)(GrGLsync sync);
236typedef GrGLenum (* GrGLClientWaitSyncProc)(GrGLsync sync, GrGLbitfield flags, GrGLuint64 timeout);
237typedef GrGLvoid (* GrGLWaitSyncProc)(GrGLsync sync, GrGLbitfield flags, GrGLuint64 timeout);
238typedef GrGLvoid (* GrGLDeleteSyncProc)(GrGLsync sync);
239
240/* ARB_internalformat_query */
241typedef GrGLvoid (* GrGLGetInternalformativProc)(GrGLenum target, GrGLenum internalformat, GrGLenum pname, GrGLsizei bufSize, GrGLint *params);
242
243/* KHR_debug */
244typedef GrGLvoid (* GrGLDebugMessageControlProc)(GrGLenum source, GrGLenum type, GrGLenum severity, GrGLsizei count, const GrGLuint* ids, GrGLboolean enabled);
245typedef GrGLvoid (* GrGLDebugMessageInsertProc)(GrGLenum source, GrGLenum type, GrGLuint id, GrGLenum severity, GrGLsizei length,  const GrGLchar* buf);
246typedef GrGLvoid (* GrGLDebugMessageCallbackProc)(GRGLDEBUGPROC callback, const GrGLvoid* userParam);
247typedef GrGLuint (* GrGLGetDebugMessageLogProc)(GrGLuint count, GrGLsizei bufSize, GrGLenum* sources, GrGLenum* types, GrGLuint* ids, GrGLenum* severities, GrGLsizei* lengths,  GrGLchar* messageLog);
248typedef GrGLvoid (* GrGLPushDebugGroupProc)(GrGLenum source, GrGLuint id, GrGLsizei length,  const GrGLchar * message);
249typedef GrGLvoid (* GrGLPopDebugGroupProc)();
250typedef GrGLvoid (* GrGLObjectLabelProc)(GrGLenum identifier, GrGLuint name, GrGLsizei length, const GrGLchar *label);
251
252/** EXT_window_rectangles */
253typedef GrGLvoid (* GrGLWindowRectanglesProc)(GrGLenum mode, GrGLsizei count, const GrGLint box[]);
254
255/** EGL functions */
256typedef const char* (* GrEGLQueryStringProc)(GrEGLDisplay dpy, GrEGLint name);
257typedef GrEGLDisplay (* GrEGLGetCurrentDisplayProc)();
258typedef GrEGLImage (* GrEGLCreateImageProc)(GrEGLDisplay dpy, GrEGLContext ctx, GrEGLenum target, GrEGLClientBuffer buffer, const GrEGLint *attrib_list);
259typedef GrEGLBoolean (* GrEGLDestroyImageProc)(GrEGLDisplay dpy, GrEGLImage image);
260}  // extern "C"
261
262// This is a lighter-weight std::function, trying to reduce code size and compile time
263// by only supporting the exact use cases we require.
264template <typename T> class GrGLFunction;
265
266template <typename R, typename... Args>
267class GrGLFunction<R(*)(Args...)>{
268public:
269    // Construct empty.
270    GrGLFunction() : fCall(nullptr) {}
271    GrGLFunction(std::nullptr_t) : GrGLFunction() {}
272
273    // Construct from a simple function pointer.
274    GrGLFunction(R (GR_GL_FUNCTION_TYPE* fn_ptr)(Args...)) : GrGLFunction() {
275        if (fn_ptr) {
276            memcpy(fBuf, &fn_ptr, sizeof(fn_ptr));
277            fCall = [](const void* buf, Args... args) {
278                auto fn_ptr = *(R (GR_GL_FUNCTION_TYPE**)(Args...))buf;
279                return fn_ptr(args...);
280            };
281        }
282    }
283
284    // Construct from a small closure.
285    template <typename Closure>
286    GrGLFunction(Closure closure) : GrGLFunction() {
287        static_assert(sizeof(Closure) <= sizeof(fBuf), "fBuf is too small");
288    #if defined(__APPLE__)   // I am having serious trouble getting these to work with all STLs...
289        static_assert(std::is_trivially_copyable<Closure>::value, "");
290        static_assert(std::is_trivially_destructible<Closure>::value, "");
291    #endif
292
293        memcpy(fBuf, &closure, sizeof(closure));
294        fCall = [](const void* buf, Args... args) {
295            auto closure = (const Closure*)buf;
296            return (*closure)(args...);
297        };
298    }
299
300    R operator()(Args... args) const {
301        SkASSERT(fCall);
302        return fCall(fBuf, args...);
303    }
304
305    explicit operator bool() const {
306        return fCall != nullptr;
307    }
308
309private:
310    R (*fCall)(const void*, Args...);
311    size_t fBuf[4];
312};
313
314#endif
315