d1e4335318
This never worked correctly. The texture loses multisample status when the resolve occurs. We never had code to re-establish it. Also, we'd have to handle the case where you resolve but then want to render to it again without clearing. Review URL: http://codereview.appspot.com/4274074/ git-svn-id: http://skia.googlecode.com/svn/trunk@974 2bbb7eff-a529-9590-31e7-b0007b416f81
294 lines
17 KiB
C
294 lines
17 KiB
C
/*
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Copyright 2011 Google Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#ifndef GrGLInterface_DEFINED
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#define GrGLInterface_DEFINED
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#include "GrGLPlatformIncludes.h"
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#include "GrTypes.h"
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#if !defined(GR_GL_FUNCTION_TYPE)
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#define GR_GL_FUNCTION_TYPE
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#endif
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////////////////////////////////////////////////////////////////////////////////
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/**
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* Helpers for glGetString()
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*/
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bool has_gl_extension(const char* ext);
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void gl_version(int* major, int* minor);
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////////////////////////////////////////////////////////////////////////////////
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/*
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* Routines managing the global interface used to invoke OpenGL calls.
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*/
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struct GrGLInterface;
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GR_API GrGLInterface* GrGLGetGLInterface();
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GR_API void GrGLSetGLInterface(GrGLInterface* gl_interface);
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/*
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* Populates the global GrGLInterface pointer with an instance pointing to the
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* GL implementation linked with the executable.
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*/
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extern void GrGLSetDefaultGLInterface();
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typedef unsigned int GrGLenum;
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typedef unsigned char GrGLboolean;
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typedef unsigned int GrGLbitfield;
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typedef signed char GrGLbyte;
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typedef short GrGLshort;
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typedef int GrGLint;
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typedef int GrGLsizei;
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typedef unsigned char GrGLubyte;
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typedef unsigned short GrGLushort;
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typedef unsigned int GrGLuint;
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typedef float GrGLfloat;
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typedef float GrGLclampf;
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typedef double GrGLdouble;
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typedef double GrGLclampd;
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typedef void GrGLvoid;
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enum GrGLBinding {
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kDesktop_GrGLBinding = 0x01,
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kES1_GrGLBinding = 0x02,
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kES2_GrGLBinding = 0x04
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};
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extern "C" {
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/*
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* The following interface exports the OpenGL entry points used by the system.
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* Use of OpenGL calls is disallowed. All calls should be invoked through
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* the global instance of this struct, defined above.
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*
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* IMPORTANT NOTE: The OpenGL entry points exposed here include both core GL
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* functions, and extensions. The system assumes that the address of the
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* extension pointer will be valid across contexts.
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*/
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struct GrGLInterface {
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLActiveTextureProc)(GrGLenum texture);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLAttachShaderProc)(GrGLuint program, GrGLuint shader);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLBindAttribLocationProc)(GrGLuint program, GrGLuint index, const char* name);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLBindBufferProc)(GrGLenum target, GrGLuint buffer);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLBindTextureProc)(GrGLenum target, GrGLuint texture);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLBlendColorProc)(GrGLclampf red, GrGLclampf green, GrGLclampf blue, GrGLclampf alpha);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLBlendFuncProc)(GrGLenum sfactor, GrGLenum dfactor);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLBufferDataProc)(GrGLenum target, GrGLsizei size, const GrGLvoid* data, GrGLenum usage);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLBufferSubDataProc)(GrGLenum target, GrGLint offset, GrGLsizei size, const GrGLvoid* data);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLClearProc)(GrGLbitfield mask);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLClearColorProc)(GrGLclampf red, GrGLclampf green, GrGLclampf blue, GrGLclampf alpha);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLClearStencilProc)(GrGLint s);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLClientActiveTextureProc)(GrGLenum texture);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLColor4ubProc)(GrGLubyte red, GrGLubyte green, GrGLubyte blue, GrGLubyte alpha);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLColorMaskProc)(GrGLboolean red, GrGLboolean green, GrGLboolean blue, GrGLboolean alpha);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLColorPointerProc)(GrGLint size, GrGLenum type, GrGLsizei stride, const GrGLvoid* pointer);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLCompileShaderProc)(GrGLuint shader);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLCompressedTexImage2DProc)(GrGLenum target, GrGLint level, GrGLenum internalformat, GrGLsizei width, GrGLsizei height, GrGLint border, GrGLsizei imageSize, const GrGLvoid* data);
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typedef GrGLuint (GR_GL_FUNCTION_TYPE *GrGLCreateProgramProc)(void);
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typedef GrGLuint (GR_GL_FUNCTION_TYPE *GrGLCreateShaderProc)(GrGLenum type);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLCullFaceProc)(GrGLenum mode);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLDeleteBuffersProc)(GrGLsizei n, const GrGLuint* buffers);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLDeleteProgramProc)(GrGLuint program);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLDeleteShaderProc)(GrGLuint shader);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLDeleteTexturesProc)(GrGLsizei n, const GrGLuint* textures);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLDepthMaskProc)(GrGLboolean flag);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLDisableProc)(GrGLenum cap);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLDisableClientStateProc)(GrGLenum array);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLDisableVertexAttribArrayProc)(GrGLuint index);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLDrawArraysProc)(GrGLenum mode, GrGLint first, GrGLsizei count);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLDrawElementsProc)(GrGLenum mode, GrGLsizei count, GrGLenum type, const GrGLvoid* indices);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLEnableProc)(GrGLenum cap);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLEnableClientStateProc)(GrGLenum cap);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLEnableVertexAttribArrayProc)(GrGLuint index);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLFrontFaceProc)(GrGLenum mode);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLGenBuffersProc)(GrGLsizei n, GrGLuint* buffers);
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typedef GrGLenum (GR_GL_FUNCTION_TYPE *GrGLGetErrorProc)(void);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLGenTexturesProc)(GrGLsizei n, GrGLuint* textures);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLGetBufferParameterivProc)(GrGLenum target, GrGLenum pname, GrGLint* params);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLGetIntegervProc)(GrGLenum pname, GrGLint* params);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLGetProgramInfoLogProc)(GrGLuint program, GrGLsizei bufsize, GrGLsizei* length, char* infolog);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLGetProgramivProc)(GrGLuint program, GrGLenum pname, GrGLint* params);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLGetShaderInfoLogProc)(GrGLuint shader, GrGLsizei bufsize, GrGLsizei* length, char* infolog);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLGetShaderivProc)(GrGLuint shader, GrGLenum pname, GrGLint* params);
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typedef const GrGLubyte* (GR_GL_FUNCTION_TYPE *GrGLGetStringProc)(GrGLenum name);
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typedef GrGLint (GR_GL_FUNCTION_TYPE *GrGLGetUniformLocationProc)(GrGLuint program, const char* name);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLLineWidthProc)(GrGLfloat width);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLLinkProgramProc)(GrGLuint program);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLLoadMatrixfProc)(const GrGLfloat* m);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLMatrixModeProc)(GrGLenum mode);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLPixelStoreiProc)(GrGLenum pname, GrGLint param);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLPointSizeProc)(GrGLfloat size);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLReadPixelsProc)(GrGLint x, GrGLint y, GrGLsizei width, GrGLsizei height, GrGLenum format, GrGLenum type, GrGLvoid* pixels);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLScissorProc)(GrGLint x, GrGLint y, GrGLsizei width, GrGLsizei height);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLShadeModelProc)(GrGLenum mode);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLShaderSourceProc)(GrGLuint shader, GrGLsizei count, const char** str, const GrGLint* length);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLStencilFuncProc)(GrGLenum func, GrGLint ref, GrGLuint mask);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLStencilFuncSeparateProc)(GrGLenum face, GrGLenum func, GrGLint ref, GrGLuint mask);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLStencilMaskProc)(GrGLuint mask);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLStencilMaskSeparateProc)(GrGLenum face, GrGLuint mask);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLStencilOpProc)(GrGLenum fail, GrGLenum zfail, GrGLenum zpass);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLStencilOpSeparateProc)(GrGLenum face, GrGLenum fail, GrGLenum zfail, GrGLenum zpass);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLTexCoordPointerProc)(GrGLint size, GrGLenum type, GrGLsizei stride, const GrGLvoid* pointer);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLTexEnviProc)(GrGLenum target, GrGLenum pname, GrGLint param);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLTexImage2DProc)(GrGLenum target, GrGLint level, GrGLint internalformat, GrGLsizei width, GrGLsizei height, GrGLint border, GrGLenum format, GrGLenum type, const GrGLvoid* pixels);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLTexParameteriProc)(GrGLenum target, GrGLenum pname, GrGLint param);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLTexSubImage2DProc)(GrGLenum target, GrGLint level, GrGLint xoffset, GrGLint yoffset, GrGLsizei width, GrGLsizei height, GrGLenum format, GrGLenum type, const GrGLvoid* pixels);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLUniform1fvProc)(GrGLint location, GrGLsizei count, const GrGLfloat* v);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLUniform1iProc)(GrGLint location, GrGLint x);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLUniform4fvProc)(GrGLint location, GrGLsizei count, const GrGLfloat* v);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLUniformMatrix3fvProc)(GrGLint location, GrGLsizei count, GrGLboolean transpose, const GrGLfloat* value);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLUseProgramProc)(GrGLuint program);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLVertexAttrib4fvProc)(GrGLuint indx, const GrGLfloat* values);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLVertexAttribPointerProc)(GrGLuint indx, GrGLint size, GrGLenum type, GrGLboolean normalized, GrGLsizei stride, const GrGLvoid* ptr);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLVertexPointerProc)(GrGLint size, GrGLenum type, GrGLsizei stride, const GrGLvoid* pointer);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLViewportProc)(GrGLint x, GrGLint y, GrGLsizei width, GrGLsizei height);
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// FBO Extension Functions
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLBindFramebufferProc)(GrGLenum target, GrGLuint framebuffer);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLBindRenderbufferProc)(GrGLenum target, GrGLuint renderbuffer);
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typedef GrGLenum (GR_GL_FUNCTION_TYPE *GrGLCheckFramebufferStatusProc)(GrGLenum target);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLDeleteFramebuffersProc)(GrGLsizei n, const GrGLuint *framebuffers);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLDeleteRenderbuffersProc)(GrGLsizei n, const GrGLuint *renderbuffers);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLFramebufferRenderbufferProc)(GrGLenum target, GrGLenum attachment, GrGLenum renderbuffertarget, GrGLuint renderbuffer);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLFramebufferTexture2DProc)(GrGLenum target, GrGLenum attachment, GrGLenum textarget, GrGLuint texture, GrGLint level);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLGenFramebuffersProc)(GrGLsizei n, GrGLuint *framebuffers);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLGenRenderbuffersProc)(GrGLsizei n, GrGLuint *renderbuffers);
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLRenderbufferStorageProc)(GrGLenum target, GrGLenum internalformat, GrGLsizei width, GrGLsizei height);
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// Multisampling Extension Functions
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// same prototype for ARB_FBO, EXT_FBO, GL 3.0, & Apple ES extension
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLRenderbufferStorageMultisampleProc)(GrGLenum target, GrGLsizei samples, GrGLenum internalformat, GrGLsizei width, GrGLsizei height);
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// desktop: ext_fbo_blit, arb_fbo, gl 3.0
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLBlitFramebufferProc)(GrGLint srcX0, GrGLint srcY0, GrGLint srcX1, GrGLint srcY1, GrGLint dstX0, GrGLint dstY0, GrGLint dstX1, GrGLint dstY1, GrGLbitfield mask, GrGLenum filter);
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// apple's es extension
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typedef GrGLvoid (GR_GL_FUNCTION_TYPE *GrGLResolveMultisampleFramebufferProc)();
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// Buffer mapping (extension in ES).
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typedef GrGLvoid* (GR_GL_FUNCTION_TYPE *GrGLMapBufferProc)(GrGLenum target, GrGLenum access);
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typedef GrGLboolean (GR_GL_FUNCTION_TYPE *GrGLUnmapBufferProc)(GrGLenum target);
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// Indicator variable specifying the type of GL implementation
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// exported: GLES{1|2} or Desktop.
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GrGLBinding fBindingsExported;
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GrGLActiveTextureProc fActiveTexture;
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GrGLAttachShaderProc fAttachShader;
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GrGLBindAttribLocationProc fBindAttribLocation;
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GrGLBindBufferProc fBindBuffer;
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GrGLBindTextureProc fBindTexture;
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GrGLBlendFuncProc fBlendFunc;
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GrGLBlendColorProc fBlendColor;
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GrGLBufferDataProc fBufferData;
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GrGLBufferSubDataProc fBufferSubData;
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GrGLClearProc fClear;
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GrGLClearColorProc fClearColor;
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GrGLClearStencilProc fClearStencil;
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GrGLClientActiveTextureProc fClientActiveTexture;
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GrGLColor4ubProc fColor4ub;
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GrGLColorMaskProc fColorMask;
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GrGLColorPointerProc fColorPointer;
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GrGLCompileShaderProc fCompileShader;
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GrGLCompressedTexImage2DProc fCompressedTexImage2D;
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GrGLCreateProgramProc fCreateProgram;
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GrGLCreateShaderProc fCreateShader;
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GrGLCullFaceProc fCullFace;
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GrGLDeleteBuffersProc fDeleteBuffers;
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GrGLDeleteProgramProc fDeleteProgram;
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GrGLDeleteShaderProc fDeleteShader;
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GrGLDeleteTexturesProc fDeleteTextures;
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GrGLDepthMaskProc fDepthMask;
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GrGLDisableProc fDisable;
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GrGLDisableClientStateProc fDisableClientState;
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GrGLDisableVertexAttribArrayProc fDisableVertexAttribArray;
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GrGLDrawArraysProc fDrawArrays;
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GrGLDrawElementsProc fDrawElements;
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GrGLEnableProc fEnable;
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GrGLEnableClientStateProc fEnableClientState;
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GrGLEnableVertexAttribArrayProc fEnableVertexAttribArray;
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GrGLFrontFaceProc fFrontFace;
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GrGLGenBuffersProc fGenBuffers;
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GrGLGenTexturesProc fGenTextures;
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GrGLGetBufferParameterivProc fGetBufferParameteriv;
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GrGLGetErrorProc fGetError;
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GrGLGetIntegervProc fGetIntegerv;
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GrGLGetProgramInfoLogProc fGetProgramInfoLog;
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GrGLGetProgramivProc fGetProgramiv;
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GrGLGetShaderInfoLogProc fGetShaderInfoLog;
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GrGLGetShaderivProc fGetShaderiv;
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GrGLGetStringProc fGetString;
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GrGLGetUniformLocationProc fGetUniformLocation;
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GrGLLineWidthProc fLineWidth;
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GrGLLinkProgramProc fLinkProgram;
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GrGLLoadMatrixfProc fLoadMatrixf;
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GrGLMatrixModeProc fMatrixMode;
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GrGLPixelStoreiProc fPixelStorei;
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GrGLPointSizeProc fPointSize;
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GrGLReadPixelsProc fReadPixels;
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GrGLScissorProc fScissor;
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GrGLShadeModelProc fShadeModel;
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GrGLShaderSourceProc fShaderSource;
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GrGLStencilFuncProc fStencilFunc;
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GrGLStencilFuncSeparateProc fStencilFuncSeparate;
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GrGLStencilMaskProc fStencilMask;
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GrGLStencilMaskSeparateProc fStencilMaskSeparate;
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GrGLStencilOpProc fStencilOp;
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GrGLStencilOpSeparateProc fStencilOpSeparate;
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GrGLTexCoordPointerProc fTexCoordPointer;
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GrGLTexEnviProc fTexEnvi;
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GrGLTexImage2DProc fTexImage2D;
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GrGLTexParameteriProc fTexParameteri;
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GrGLTexSubImage2DProc fTexSubImage2D;
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GrGLUniform1fvProc fUniform1fv;
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GrGLUniform1iProc fUniform1i;
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GrGLUniform4fvProc fUniform4fv;
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GrGLUniformMatrix3fvProc fUniformMatrix3fv;
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GrGLUseProgramProc fUseProgram;
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GrGLVertexAttrib4fvProc fVertexAttrib4fv;
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GrGLVertexAttribPointerProc fVertexAttribPointer;
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GrGLVertexPointerProc fVertexPointer;
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GrGLViewportProc fViewport;
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// FBO Extension Functions
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GrGLBindFramebufferProc fBindFramebuffer;
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GrGLBindRenderbufferProc fBindRenderbuffer;
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GrGLCheckFramebufferStatusProc fCheckFramebufferStatus;
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GrGLDeleteFramebuffersProc fDeleteFramebuffers;
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GrGLDeleteRenderbuffersProc fDeleteRenderbuffers;
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GrGLFramebufferRenderbufferProc fFramebufferRenderbuffer;
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GrGLFramebufferTexture2DProc fFramebufferTexture2D;
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GrGLGenFramebuffersProc fGenFramebuffers;
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GrGLGenRenderbuffersProc fGenRenderbuffers;
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GrGLRenderbufferStorageProc fRenderbufferStorage;
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// Multisampling Extension Functions
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// same prototype for ARB_FBO, EXT_FBO, GL 3.0, & Apple ES extension
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GrGLRenderbufferStorageMultisampleProc fRenderbufferStorageMultisample;
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// desktop: ext_fbo_blit, arb_fbo, gl 3.0
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GrGLBlitFramebufferProc fBlitFramebuffer;
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// apple's es extension
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GrGLResolveMultisampleFramebufferProc fResolveMultisampleFramebuffer;
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// Buffer mapping (extension in ES).
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GrGLMapBufferProc fMapBuffer;
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GrGLUnmapBufferProc fUnmapBuffer;
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};
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} // extern "C"
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#endif
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