skia WIPjarred/canvas

1 files changed, 304 insertions, 0 deletions

diff --git a/src/deps/skia/include/gpu/gl/GrGLFunctions.h b/src/deps/skia/include/gpu/gl/GrGLFunctions.h
new file mode 100644
index 000000000..aef61e065
--- /dev/null
+++ b/src/deps/skia/include/gpu/gl/GrGLFunctions.h
@@ -0,0 +1,304 @@
+
+/*
+ * Copyright 2012 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef GrGLFunctions_DEFINED
+#define GrGLFunctions_DEFINED
+
+#include <cstring>
+#include "include/gpu/gl/GrGLTypes.h"
+#include "include/private/SkTLogic.h"
+
+
+extern "C" {
+
+///////////////////////////////////////////////////////////////////////////////
+
+using GrGLActiveTextureFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum texture);
+using GrGLAttachShaderFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint program, GrGLuint shader);
+using GrGLBeginQueryFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLuint id);
+using GrGLBindAttribLocationFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint program, GrGLuint index, const char* name);
+using GrGLBindBufferFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLuint buffer);
+using GrGLBindFramebufferFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLuint framebuffer);
+using GrGLBindRenderbufferFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLuint renderbuffer);
+using GrGLBindTextureFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLuint texture);
+using GrGLBindFragDataLocationFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint program, GrGLuint colorNumber, const GrGLchar* name);
+using GrGLBindFragDataLocationIndexedFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint program, GrGLuint colorNumber, GrGLuint index, const GrGLchar* name);
+using GrGLBindSamplerFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint unit, GrGLuint sampler);
+using GrGLBindVertexArrayFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint array);
+using GrGLBlendBarrierFn = GrGLvoid GR_GL_FUNCTION_TYPE();
+using GrGLBlendColorFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLclampf red, GrGLclampf green, GrGLclampf blue, GrGLclampf alpha);
+using GrGLBlendEquationFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum mode);
+using GrGLBlendFuncFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum sfactor, GrGLenum dfactor);
+using GrGLBlitFramebufferFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLint srcX0, GrGLint srcY0, GrGLint srcX1, GrGLint srcY1, GrGLint dstX0, GrGLint dstY0, GrGLint dstX1, GrGLint dstY1, GrGLbitfield mask, GrGLenum filter);
+using GrGLBufferDataFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLsizeiptr size, const GrGLvoid* data, GrGLenum usage);
+using GrGLBufferSubDataFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLintptr offset, GrGLsizeiptr size, const GrGLvoid* data);
+using GrGLCheckFramebufferStatusFn = GrGLenum GR_GL_FUNCTION_TYPE(GrGLenum target);
+using GrGLClearFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLbitfield mask);
+using GrGLClearColorFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLclampf red, GrGLclampf green, GrGLclampf blue, GrGLclampf alpha);
+using GrGLClearStencilFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLint s);
+using GrGLClearTexImageFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint texture, GrGLint level, GrGLenum format, GrGLenum type, const GrGLvoid* data);
+using GrGLClearTexSubImageFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint texture, GrGLint level, GrGLint xoffset, GrGLint yoffset, GrGLint zoffset, GrGLsizei width, GrGLsizei height, GrGLsizei depth, GrGLenum format, GrGLenum type, const GrGLvoid* data);
+using GrGLColorMaskFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLboolean red, GrGLboolean green, GrGLboolean blue, GrGLboolean alpha);
+using GrGLCompileShaderFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint shader);
+using GrGLCompressedTexImage2DFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLint level, GrGLenum internalformat, GrGLsizei width, GrGLsizei height, GrGLint border, GrGLsizei imageSize, const GrGLvoid* data);
+using GrGLCompressedTexSubImage2DFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLint level, GrGLint xoffset, GrGLint yoffset, GrGLsizei width, GrGLsizei height, GrGLenum format, GrGLsizei imageSize, const GrGLvoid* data);
+using GrGLCopyTexSubImage2DFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLint level, GrGLint xoffset, GrGLint yoffset, GrGLint x, GrGLint y, GrGLsizei width, GrGLsizei height);
+using GrGLCreateProgramFn = GrGLuint GR_GL_FUNCTION_TYPE();
+using GrGLCreateShaderFn = GrGLuint GR_GL_FUNCTION_TYPE(GrGLenum type);
+using GrGLCullFaceFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum mode);
+using GrGLDeleteBuffersFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLsizei n, const GrGLuint* buffers);
+using GrGLDeleteFencesFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLsizei n, const GrGLuint* fences);
+using GrGLDeleteFramebuffersFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLsizei n, const GrGLuint* framebuffers);
+using GrGLDeleteProgramFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint program);
+using GrGLDeleteQueriesFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLsizei n, const GrGLuint* ids);
+using GrGLDeleteRenderbuffersFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLsizei n, const GrGLuint* renderbuffers);
+using GrGLDeleteSamplersFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLsizei count, const GrGLuint* samplers);
+using GrGLDeleteShaderFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint shader);
+using GrGLDeleteTexturesFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLsizei n, const GrGLuint* textures);
+using GrGLDeleteVertexArraysFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLsizei n, const GrGLuint* arrays);
+using GrGLDepthMaskFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLboolean flag);
+using GrGLDisableFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum cap);
+using GrGLDisableVertexAttribArrayFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint index);
+using GrGLDrawArraysFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum mode, GrGLint first, GrGLsizei count);
+using GrGLDrawArraysInstancedFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum mode, GrGLint first, GrGLsizei count, GrGLsizei primcount);
+using GrGLDrawArraysIndirectFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum mode, const GrGLvoid* indirect);
+using GrGLDrawBufferFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum mode);
+using GrGLDrawBuffersFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLsizei n, const GrGLenum* bufs);
+using GrGLDrawElementsFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum mode, GrGLsizei count, GrGLenum type, const GrGLvoid* indices);
+using GrGLDrawElementsInstancedFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum mode, GrGLsizei count, GrGLenum type, const GrGLvoid* indices, GrGLsizei primcount);
+using GrGLDrawElementsIndirectFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum mode, GrGLenum type, const GrGLvoid* indirect);
+using GrGLDrawRangeElementsFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum mode, GrGLuint start, GrGLuint end, GrGLsizei count, GrGLenum type, const GrGLvoid* indices);
+using GrGLEnableFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum cap);
+using GrGLEnableVertexAttribArrayFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint index);
+using GrGLEndQueryFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target);
+using GrGLFinishFn = GrGLvoid GR_GL_FUNCTION_TYPE();
+using GrGLFinishFenceFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint fence);
+using GrGLFlushFn = GrGLvoid GR_GL_FUNCTION_TYPE();
+using GrGLFlushMappedBufferRangeFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLintptr offset, GrGLsizeiptr length);
+using GrGLFramebufferRenderbufferFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLenum attachment, GrGLenum renderbuffertarget, GrGLuint renderbuffer);
+using GrGLFramebufferTexture2DFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLenum attachment, GrGLenum textarget, GrGLuint texture, GrGLint level);
+using GrGLFramebufferTexture2DMultisampleFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLenum attachment, GrGLenum textarget, GrGLuint texture, GrGLint level, GrGLsizei samples);
+using GrGLFrontFaceFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum mode);
+using GrGLGenBuffersFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLsizei n, GrGLuint* buffers);
+using GrGLGenFencesFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLsizei n, GrGLuint* fences);
+using GrGLGenFramebuffersFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLsizei n, GrGLuint* framebuffers);
+using GrGLGenerateMipmapFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target);
+using GrGLGenQueriesFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLsizei n, GrGLuint* ids);
+using GrGLGenRenderbuffersFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLsizei n, GrGLuint* renderbuffers);
+using GrGLGenSamplersFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLsizei count, GrGLuint* samplers);
+using GrGLGenTexturesFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLsizei n, GrGLuint* textures);
+using GrGLGenVertexArraysFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLsizei n, GrGLuint* arrays);
+using GrGLGetBufferParameterivFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLenum pname, GrGLint* params);
+using GrGLGetErrorFn = GrGLenum GR_GL_FUNCTION_TYPE();
+using GrGLGetFramebufferAttachmentParameterivFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLenum attachment, GrGLenum pname, GrGLint* params);
+using GrGLGetIntegervFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum pname, GrGLint* params);
+using GrGLGetMultisamplefvFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum pname, GrGLuint index, GrGLfloat* val);
+using GrGLGetProgramBinaryFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint program, GrGLsizei bufsize, GrGLsizei* length, GrGLenum* binaryFormat, void* binary);
+using GrGLGetProgramInfoLogFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint program, GrGLsizei bufsize, GrGLsizei* length, char* infolog);
+using GrGLGetProgramivFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint program, GrGLenum pname, GrGLint* params);
+using GrGLGetQueryivFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum GLtarget, GrGLenum pname, GrGLint* params);
+using GrGLGetQueryObjecti64vFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint id, GrGLenum pname, GrGLint64* params);
+using GrGLGetQueryObjectivFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint id, GrGLenum pname, GrGLint* params);
+using GrGLGetQueryObjectui64vFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint id, GrGLenum pname, GrGLuint64* params);
+using GrGLGetQueryObjectuivFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint id, GrGLenum pname, GrGLuint* params);
+using GrGLGetRenderbufferParameterivFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLenum pname, GrGLint* params);
+using GrGLGetShaderInfoLogFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint shader, GrGLsizei bufsize, GrGLsizei* length, char* infolog);
+using GrGLGetShaderivFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint shader, GrGLenum pname, GrGLint* params);
+using GrGLGetShaderPrecisionFormatFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum shadertype, GrGLenum precisiontype, GrGLint* range, GrGLint* precision);
+using GrGLGetStringFn = const GrGLubyte* GR_GL_FUNCTION_TYPE(GrGLenum name);
+using GrGLGetStringiFn = const GrGLubyte* GR_GL_FUNCTION_TYPE(GrGLenum name, GrGLuint index);
+using GrGLGetTexLevelParameterivFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLint level, GrGLenum pname, GrGLint* params);
+using GrGLGetUniformLocationFn = GrGLint GR_GL_FUNCTION_TYPE(GrGLuint program, const char* name);
+using GrGLInsertEventMarkerFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLsizei length, const char* marker);
+using GrGLInvalidateBufferDataFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint buffer);
+using GrGLInvalidateBufferSubDataFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint buffer, GrGLintptr offset, GrGLsizeiptr length);
+using GrGLInvalidateFramebufferFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLsizei numAttachments, const GrGLenum* attachments);
+using GrGLInvalidateSubFramebufferFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLsizei numAttachments, const GrGLenum* attachments, GrGLint x, GrGLint y, GrGLsizei width, GrGLsizei height);
+using GrGLInvalidateTexImageFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint texture, GrGLint level);
+using GrGLInvalidateTexSubImageFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint texture, GrGLint level, GrGLint xoffset, GrGLint yoffset, GrGLint zoffset, GrGLsizei width, GrGLsizei height, GrGLsizei depth);
+using GrGLIsTextureFn = GrGLboolean GR_GL_FUNCTION_TYPE(GrGLuint texture);
+using GrGLLineWidthFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLfloat width);
+using GrGLLinkProgramFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint program);
+using GrGLMapBufferFn = GrGLvoid* GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLenum access);
+using GrGLMapBufferRangeFn = GrGLvoid* GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLintptr offset, GrGLsizeiptr length, GrGLbitfield access);
+using GrGLMapBufferSubDataFn = GrGLvoid* GR_GL_FUNCTION_TYPE(GrGLuint target, GrGLintptr offset, GrGLsizeiptr size, GrGLenum access);
+using GrGLMapTexSubImage2DFn = GrGLvoid* GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLint level, GrGLint xoffset, GrGLint yoffset, GrGLsizei width, GrGLsizei height, GrGLenum format, GrGLenum type, GrGLenum access);
+using GrGLMemoryBarrierFn = GrGLvoid* GR_GL_FUNCTION_TYPE(GrGLbitfield barriers);
+using GrGLPatchParameteriFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum pname, GrGLint value);
+using GrGLPixelStoreiFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum pname, GrGLint param);
+using GrGLPolygonModeFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum face, GrGLenum mode);
+using GrGLPopGroupMarkerFn = GrGLvoid GR_GL_FUNCTION_TYPE();
+using GrGLProgramBinaryFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint program, GrGLenum binaryFormat, void* binary, GrGLsizei length);
+using GrGLProgramParameteriFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint program, GrGLenum pname, GrGLint value);
+using GrGLPushGroupMarkerFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLsizei length, const char* marker);
+using GrGLQueryCounterFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint id, GrGLenum target);
+using GrGLReadBufferFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum src);
+using GrGLReadPixelsFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLint x, GrGLint y, GrGLsizei width, GrGLsizei height, GrGLenum format, GrGLenum type, GrGLvoid* pixels);
+using GrGLRenderbufferStorageFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLenum internalformat, GrGLsizei width, GrGLsizei height);
+using GrGLRenderbufferStorageMultisampleFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLsizei samples, GrGLenum internalformat, GrGLsizei width, GrGLsizei height);
+using GrGLResolveMultisampleFramebufferFn = GrGLvoid GR_GL_FUNCTION_TYPE();
+using GrGLSamplerParameteriFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint sampler, GrGLenum pname, GrGLint params);
+using GrGLSamplerParameterivFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint sampler, GrGLenum pname, const GrGLint* params);
+using GrGLScissorFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLint x, GrGLint y, GrGLsizei width, GrGLsizei height);
+// GL_CHROMIUM_bind_uniform_location
+using GrGLBindUniformLocationFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint program, GrGLint location, const char* name);
+using GrGLSetFenceFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint fence, GrGLenum condition);
+using GrGLShaderSourceFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint shader, GrGLsizei count, const char* const* str, const GrGLint* length);
+using GrGLStencilFuncFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum func, GrGLint ref, GrGLuint mask);
+using GrGLStencilFuncSeparateFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum face, GrGLenum func, GrGLint ref, GrGLuint mask);
+using GrGLStencilMaskFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint mask);
+using GrGLStencilMaskSeparateFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum face, GrGLuint mask);
+using GrGLStencilOpFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum fail, GrGLenum zfail, GrGLenum zpass);
+using GrGLStencilOpSeparateFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum face, GrGLenum fail, GrGLenum zfail, GrGLenum zpass);
+using GrGLTexBufferFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLenum internalformat, GrGLuint buffer);
+using GrGLTexBufferRangeFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLenum internalformat, GrGLuint buffer, GrGLintptr offset, GrGLsizeiptr size);
+using GrGLTexImage2DFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLint level, GrGLint internalformat, GrGLsizei width, GrGLsizei height, GrGLint border, GrGLenum format, GrGLenum type, const GrGLvoid* pixels);
+using GrGLTexParameterfFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLenum pname, GrGLfloat param);
+using GrGLTexParameterfvFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLenum pname, const GrGLfloat* params);
+using GrGLTexParameteriFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLenum pname, GrGLint param);
+using GrGLTexParameterivFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLenum pname, const GrGLint* params);
+using GrGLTexStorage2DFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLsizei levels, GrGLenum internalformat, GrGLsizei width, GrGLsizei height);
+using GrGLDiscardFramebufferFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLsizei numAttachments, const GrGLenum* attachments);
+using GrGLTestFenceFn = GrGLboolean GR_GL_FUNCTION_TYPE(GrGLuint fence);
+using GrGLTexSubImage2DFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLint level, GrGLint xoffset, GrGLint yoffset, GrGLsizei width, GrGLsizei height, GrGLenum format, GrGLenum type, const GrGLvoid* pixels);
+using GrGLTextureBarrierFn = GrGLvoid GR_GL_FUNCTION_TYPE();
+using GrGLUniform1fFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLint location, GrGLfloat v0);
+using GrGLUniform1iFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLint location, GrGLint v0);
+using GrGLUniform1fvFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLint location, GrGLsizei count, const GrGLfloat* v);
+using GrGLUniform1ivFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLint location, GrGLsizei count, const GrGLint* v);
+using GrGLUniform2fFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLint location, GrGLfloat v0, GrGLfloat v1);
+using GrGLUniform2iFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLint location, GrGLint v0, GrGLint v1);
+using GrGLUniform2fvFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLint location, GrGLsizei count, const GrGLfloat* v);
+using GrGLUniform2ivFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLint location, GrGLsizei count, const GrGLint* v);
+using GrGLUniform3fFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLint location, GrGLfloat v0, GrGLfloat v1, GrGLfloat v2);
+using GrGLUniform3iFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLint location, GrGLint v0, GrGLint v1, GrGLint v2);
+using GrGLUniform3fvFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLint location, GrGLsizei count, const GrGLfloat* v);
+using GrGLUniform3ivFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLint location, GrGLsizei count, const GrGLint* v);
+using GrGLUniform4fFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLint location, GrGLfloat v0, GrGLfloat v1, GrGLfloat v2, GrGLfloat v3);
+using GrGLUniform4iFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLint location, GrGLint v0, GrGLint v1, GrGLint v2, GrGLint v3);
+using GrGLUniform4fvFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLint location, GrGLsizei count, const GrGLfloat* v);
+using GrGLUniform4ivFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLint location, GrGLsizei count, const GrGLint* v);
+using GrGLUniformMatrix2fvFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLint location, GrGLsizei count, GrGLboolean transpose, const GrGLfloat* value);
+using GrGLUniformMatrix3fvFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLint location, GrGLsizei count, GrGLboolean transpose, const GrGLfloat* value);
+using GrGLUniformMatrix4fvFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLint location, GrGLsizei count, GrGLboolean transpose, const GrGLfloat* value);
+using GrGLUnmapBufferFn = GrGLboolean GR_GL_FUNCTION_TYPE(GrGLenum target);
+using GrGLUnmapBufferSubDataFn = GrGLvoid GR_GL_FUNCTION_TYPE(const GrGLvoid* mem);
+using GrGLUnmapTexSubImage2DFn = GrGLvoid GR_GL_FUNCTION_TYPE(const GrGLvoid* mem);
+using GrGLUseProgramFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint program);
+using GrGLVertexAttrib1fFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint indx, const GrGLfloat value);
+using GrGLVertexAttrib2fvFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint indx, const GrGLfloat* values);
+using GrGLVertexAttrib3fvFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint indx, const GrGLfloat* values);
+using GrGLVertexAttrib4fvFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint indx, const GrGLfloat* values);
+using GrGLVertexAttribDivisorFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint index, GrGLuint divisor);
+using GrGLVertexAttribIPointerFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint indx, GrGLint size, GrGLenum type, GrGLsizei stride, const GrGLvoid* ptr);
+using GrGLVertexAttribPointerFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint indx, GrGLint size, GrGLenum type, GrGLboolean normalized, GrGLsizei stride, const GrGLvoid* ptr);
+using GrGLViewportFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLint x, GrGLint y, GrGLsizei width, GrGLsizei height);
+
+/* GL_NV_framebuffer_mixed_samples */
+using GrGLCoverageModulationFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum components);
+
+/* EXT_base_instance */
+using GrGLDrawArraysInstancedBaseInstanceFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum mode, GrGLint first, GrGLsizei count, GrGLsizei instancecount, GrGLuint baseinstance);
+using GrGLDrawElementsInstancedBaseVertexBaseInstanceFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum mode, GrGLsizei count, GrGLenum type, const void *indices, GrGLsizei instancecount, GrGLint basevertex, GrGLuint baseinstance);
+
+/* EXT_multi_draw_indirect */
+using GrGLMultiDrawArraysIndirectFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum mode, const GrGLvoid* indirect, GrGLsizei drawcount, GrGLsizei stride);
+using GrGLMultiDrawElementsIndirectFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum mode, GrGLenum type, const GrGLvoid* indirect, GrGLsizei drawcount, GrGLsizei stride);
+
+/* ANGLE_base_vertex_base_instance */
+using GrGLMultiDrawArraysInstancedBaseInstanceFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum mode, const GrGLint* firsts, const GrGLsizei* counts, const GrGLsizei* instanceCounts, const GrGLuint* baseInstances, const GrGLsizei drawcount);
+using GrGLMultiDrawElementsInstancedBaseVertexBaseInstanceFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum mode, const GrGLint* counts, GrGLenum type, const GrGLvoid* const* indices, const GrGLsizei* instanceCounts, const GrGLint* baseVertices, const GrGLuint* baseInstances, const GrGLsizei drawcount);
+
+/* ARB_sync */
+using GrGLFenceSyncFn = GrGLsync GR_GL_FUNCTION_TYPE(GrGLenum condition, GrGLbitfield flags);
+using GrGLIsSyncFn = GrGLboolean GR_GL_FUNCTION_TYPE(GrGLsync sync);
+using GrGLClientWaitSyncFn = GrGLenum GR_GL_FUNCTION_TYPE(GrGLsync sync, GrGLbitfield flags, GrGLuint64 timeout);
+using GrGLWaitSyncFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLsync sync, GrGLbitfield flags, GrGLuint64 timeout);
+using GrGLDeleteSyncFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLsync sync);
+
+/* ARB_internalformat_query */
+using GrGLGetInternalformativFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum target, GrGLenum internalformat, GrGLenum pname, GrGLsizei bufSize, GrGLint* params);
+
+/* KHR_debug */
+using GrGLDebugMessageControlFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum source, GrGLenum type, GrGLenum severity, GrGLsizei count, const GrGLuint* ids, GrGLboolean enabled);
+using GrGLDebugMessageInsertFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum source, GrGLenum type, GrGLuint id, GrGLenum severity, GrGLsizei length, const GrGLchar* buf);
+using GrGLDebugMessageCallbackFn = GrGLvoid GR_GL_FUNCTION_TYPE(GRGLDEBUGPROC callback, const GrGLvoid* userParam);
+using GrGLGetDebugMessageLogFn = GrGLuint GR_GL_FUNCTION_TYPE(GrGLuint count, GrGLsizei bufSize, GrGLenum* sources, GrGLenum* types, GrGLuint* ids, GrGLenum* severities, GrGLsizei* lengths, GrGLchar* messageLog);
+using GrGLPushDebugGroupFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum source, GrGLuint id, GrGLsizei length, const GrGLchar* message);
+using GrGLPopDebugGroupFn = GrGLvoid GR_GL_FUNCTION_TYPE();
+using GrGLObjectLabelFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum identifier, GrGLuint name, GrGLsizei length, const GrGLchar* label);
+
+/** EXT_window_rectangles */
+using GrGLWindowRectanglesFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLenum mode, GrGLsizei count, const GrGLint box[]);
+
+/** GL_QCOM_tiled_rendering */
+using GrGLStartTilingFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLuint x, GrGLuint y, GrGLuint width, GrGLuint height, GrGLbitfield preserveMask);
+using GrGLEndTilingFn = GrGLvoid GR_GL_FUNCTION_TYPE(GrGLbitfield preserveMask);
+
+/** EGL functions */
+using GrEGLQueryStringFn = const char* GR_GL_FUNCTION_TYPE(GrEGLDisplay dpy, GrEGLint name);
+using GrEGLGetCurrentDisplayFn = GrEGLDisplay GR_GL_FUNCTION_TYPE();
+using GrEGLCreateImageFn = GrEGLImage GR_GL_FUNCTION_TYPE(GrEGLDisplay dpy, GrEGLContext ctx, GrEGLenum target, GrEGLClientBuffer buffer, const GrEGLint* attrib_list);
+using GrEGLDestroyImageFn = GrEGLBoolean GR_GL_FUNCTION_TYPE(GrEGLDisplay dpy, GrEGLImage image);
+}  // extern "C"
+
+// This is a lighter-weight std::function, trying to reduce code size and compile time
+// by only supporting the exact use cases we require.
+template <typename T> class GrGLFunction;
+
+template <typename R, typename... Args>
+class GrGLFunction<R GR_GL_FUNCTION_TYPE(Args...)> {
+public:
+    using Fn = R GR_GL_FUNCTION_TYPE(Args...);
+    // Construct empty.
+    GrGLFunction() = default;
+    GrGLFunction(std::nullptr_t) {}
+
+    // Construct from a simple function pointer.
+    GrGLFunction(Fn* fn_ptr) {
+        static_assert(sizeof(fn_ptr) <= sizeof(fBuf), "fBuf is too small");
+        if (fn_ptr) {
+            memcpy(fBuf, &fn_ptr, sizeof(fn_ptr));
+            fCall = [](const void* buf, Args... args) {
+                return (*(Fn**)buf)(std::forward<Args>(args)...);
+            };
+        }
+    }
+
+    // Construct from a small closure.
+    template <typename Closure>
+    GrGLFunction(Closure closure) : GrGLFunction() {
+        static_assert(sizeof(Closure) <= sizeof(fBuf), "fBuf is too small");
+#if defined(__APPLE__)  // I am having serious trouble getting these to work with all STLs...
+        static_assert(std::is_trivially_copyable<Closure>::value, "");
+        static_assert(std::is_trivially_destructible<Closure>::value, "");
+#endif
+
+        memcpy(fBuf, &closure, sizeof(closure));
+        fCall = [](const void* buf, Args... args) {
+            auto closure = (const Closure*)buf;
+            return (*closure)(args...);
+        };
+    }
+
+    R operator()(Args... args) const {
+        SkASSERT(fCall);
+        return fCall(fBuf, std::forward<Args>(args)...);
+    }
+
+    explicit operator bool() const { return fCall != nullptr; }
+
+    void reset() { fCall = nullptr; }
+
+private:
+    using Call = R(const void* buf, Args...);
+    Call* fCall = nullptr;
+    size_t fBuf[4];
+};
+
+#endif