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/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "gl/GrGLInterface.h"
#include "gl/GrGLExtensions.h"
#include "GrGLUtil.h"
#include <OpenGL/gl.h>
#include <OpenGL/glext.h>
#include <dlfcn.h>
static void* GetProcAddress(const char* name) {
return dlsym(RTLD_DEFAULT, name);
}
#define GET_PROC(name) (interface->f ## name = ((GrGL ## name ## Proc) GetProcAddress("gl" #name)))
#define GET_PROC_SUFFIX(name, suffix) (interface->f ## name = ((GrGL ## name ## Proc) GetProcAddress("gl" #name #suffix)))
const GrGLInterface* GrGLCreateNativeInterface() {
// The gl functions are not context-specific so we create one global
// interface
static SkAutoTUnref<GrGLInterface> glInterface;
if (!glInterface.get()) {
GrGLInterface* interface = new GrGLInterface;
glInterface.reset(interface);
const char* verStr = (const char*) glGetString(GL_VERSION);
GrGLVersion ver = GrGLGetVersionFromString(verStr);
GrGLExtensions extensions;
GrGLGetStringiProc glGetStringi = (GrGLGetStringiProc) GetProcAddress("glGetStringi");
if (!extensions.init(kDesktop_GrGLBinding, glGetString, glGetStringi, glGetIntegerv)) {
glInterface.reset(NULL);
return NULL;
}
interface->fBindingsExported = kDesktop_GrGLBinding;
interface->fActiveTexture = glActiveTexture;
interface->fAttachShader = glAttachShader;
interface->fBeginQuery = glBeginQuery;
interface->fBindAttribLocation = glBindAttribLocation;
interface->fBindBuffer = glBindBuffer;
if (ver >= GR_GL_VER(3,0)) {
#if GL_VERSION_3_0
interface->fBindFragDataLocation = glBindFragDataLocation;
#else
GET_PROC(BindFragDataLocation);
#endif
}
interface->fBindTexture = glBindTexture;
interface->fBlendFunc = glBlendFunc;
if (ver >= GR_GL_VER(1,4)) {
interface->fBlendColor = glBlendColor;
} else if (extensions.has("GL_ARB_imaging") ||
extensions.has("GL_EXT_blend_color")) {
GET_PROC(BlendColor);
}
interface->fBufferData = glBufferData;
interface->fBufferSubData = glBufferSubData;
interface->fClear = glClear;
interface->fClearColor = glClearColor;
interface->fClearStencil = glClearStencil;
interface->fColorMask = glColorMask;
interface->fCompileShader = glCompileShader;
interface->fCompressedTexImage2D = glCompressedTexImage2D;
interface->fCreateProgram = glCreateProgram;
interface->fCreateShader = glCreateShader;
interface->fCullFace = glCullFace;
interface->fDeleteBuffers = glDeleteBuffers;
interface->fDeleteProgram = glDeleteProgram;
interface->fDeleteQueries = glDeleteQueries;
interface->fDeleteShader = glDeleteShader;
interface->fDeleteTextures = glDeleteTextures;
interface->fDepthMask = glDepthMask;
interface->fDisable = glDisable;
interface->fDisableVertexAttribArray = glDisableVertexAttribArray;
interface->fDrawArrays = glDrawArrays;
interface->fDrawBuffer = glDrawBuffer;
interface->fDrawBuffers = glDrawBuffers;
interface->fDrawElements = glDrawElements;
interface->fEnable = glEnable;
interface->fEnableVertexAttribArray = glEnableVertexAttribArray;
interface->fEndQuery = glEndQuery;
interface->fFinish = glFinish;
interface->fFlush = glFlush;
interface->fFrontFace = glFrontFace;
interface->fGenBuffers = glGenBuffers;
interface->fGenQueries = glGenQueries;
interface->fGetBufferParameteriv = glGetBufferParameteriv;
interface->fGetError = glGetError;
interface->fGetIntegerv = glGetIntegerv;
interface->fGetProgramInfoLog = glGetProgramInfoLog;
interface->fGetProgramiv = glGetProgramiv;
interface->fGetQueryiv = glGetQueryiv;
interface->fGetQueryObjectiv = glGetQueryObjectiv;
interface->fGetQueryObjectuiv = glGetQueryObjectuiv;
interface->fGetShaderInfoLog = glGetShaderInfoLog;
interface->fGetShaderiv = glGetShaderiv;
interface->fGetString = glGetString;
interface->fGetStringi = glGetStringi;
interface->fGetTexLevelParameteriv = glGetTexLevelParameteriv;
interface->fGenTextures = glGenTextures;
interface->fGetUniformLocation = glGetUniformLocation;
interface->fLineWidth = glLineWidth;
interface->fLinkProgram = glLinkProgram;
interface->fMapBuffer = glMapBuffer;
interface->fPixelStorei = glPixelStorei;
interface->fReadBuffer = glReadBuffer;
interface->fReadPixels = glReadPixels;
interface->fScissor = glScissor;
// The new OpenGLES2 header has an extra "const" in it. :(
#if GR_GL_USE_NEW_SHADER_SOURCE_SIGNATURE
interface->fShaderSource = (GrGLShaderSourceProc) glShaderSource;
#else
interface->fShaderSource = glShaderSource;
#endif
interface->fStencilFunc = glStencilFunc;
interface->fStencilFuncSeparate = glStencilFuncSeparate;
interface->fStencilMask = glStencilMask;
interface->fStencilMaskSeparate = glStencilMaskSeparate;
interface->fStencilOp = glStencilOp;
interface->fStencilOpSeparate = glStencilOpSeparate;
// mac uses GLenum for internalFormat param (non-standard)
// amounts to int vs. uint.
interface->fTexImage2D = (GrGLTexImage2DProc)glTexImage2D;
interface->fTexParameteri = glTexParameteri;
interface->fTexParameteriv = glTexParameteriv;
#if GL_ARB_texture_storage || GL_VERSION_4_2
interface->fTexStorage2D = glTexStorage2D
#elif GL_EXT_texture_storage
interface->fTexStorage2D = glTexStorage2DEXT;
#else
if (ver >= GR_GL_VER(4,2) || extensions.has("GL_ARB_texture_storage")) {
GET_PROC(TexStorage2D);
} else if (extensions.has("GL_EXT_texture_storage")) {
GET_PROC_SUFFIX(TexStorage2D, EXT);
}
#endif
interface->fTexSubImage2D = glTexSubImage2D;
interface->fUniform1f = glUniform1f;
interface->fUniform1i = glUniform1i;
interface->fUniform1fv = glUniform1fv;
interface->fUniform1iv = glUniform1iv;
interface->fUniform2f = glUniform2f;
interface->fUniform2i = glUniform2i;
interface->fUniform2fv = glUniform2fv;
interface->fUniform2iv = glUniform2iv;
interface->fUniform3f = glUniform3f;
interface->fUniform3i = glUniform3i;
interface->fUniform3fv = glUniform3fv;
interface->fUniform3iv = glUniform3iv;
interface->fUniform4f = glUniform4f;
interface->fUniform4i = glUniform4i;
interface->fUniform4fv = glUniform4fv;
interface->fUniform4iv = glUniform4iv;
interface->fUniform4fv = glUniform4fv;
interface->fUniformMatrix2fv = glUniformMatrix2fv;
interface->fUniformMatrix3fv = glUniformMatrix3fv;
interface->fUniformMatrix4fv = glUniformMatrix4fv;
interface->fUnmapBuffer = glUnmapBuffer;
interface->fUseProgram = glUseProgram;
interface->fVertexAttrib4fv = glVertexAttrib4fv;
interface->fVertexAttribPointer = glVertexAttribPointer;
interface->fViewport = glViewport;
if (ver >= GR_GL_VER(3,0) || extensions.has("GL_ARB_vertex_array_object")) {
// no ARB suffix for GL_ARB_vertex_array_object
#if GL_ARB_vertex_array_object || GL_VERSION_3_0
interface->fBindVertexArray = glBindVertexArray;
interface->fDeleteVertexArrays = glDeleteVertexArrays;
interface->fGenVertexArrays = glGenVertexArrays;
#else
GET_PROC(BindVertexArray);
GET_PROC(DeleteVertexArrays);
GET_PROC(GenVertexArrays);
#endif
}
if (ver >= GR_GL_VER(3,3) || extensions.has("GL_ARB_timer_query")) {
// ARB extension doesn't use the ARB suffix on the function name
#if GL_ARB_timer_query || GL_VERSION_3_3
interface->fQueryCounter = glQueryCounter;
interface->fGetQueryObjecti64v = glGetQueryObjecti64v;
interface->fGetQueryObjectui64v = glGetQueryObjectui64v;
#else
GET_PROC(QueryCounter);
GET_PROC(GetQueryObjecti64v);
GET_PROC(GetQueryObjectui64v);
#endif
} else if (extensions.has("GL_EXT_timer_query")) {
#if GL_EXT_timer_query
interface->fGetQueryObjecti64v = glGetQueryObjecti64vEXT;
interface->fGetQueryObjectui64v = glGetQueryObjectui64vEXT;
#else
GET_PROC_SUFFIX(GetQueryObjecti64v, EXT);
GET_PROC_SUFFIX(GetQueryObjectui64v, EXT);
#endif
}
if (ver >= GR_GL_VER(3,0) || extensions.has("GL_ARB_framebuffer_object")) {
// ARB extension doesn't use the ARB suffix on the function names
#if GL_VERSION_3_0 || GL_ARB_framebuffer_object
interface->fGenFramebuffers = glGenFramebuffers;
interface->fGetFramebufferAttachmentParameteriv = glGetFramebufferAttachmentParameteriv;
interface->fGetRenderbufferParameteriv = glGetRenderbufferParameteriv;
interface->fBindFramebuffer = glBindFramebuffer;
interface->fFramebufferTexture2D = glFramebufferTexture2D;
interface->fCheckFramebufferStatus = glCheckFramebufferStatus;
interface->fDeleteFramebuffers = glDeleteFramebuffers;
interface->fRenderbufferStorage = glRenderbufferStorage;
interface->fGenRenderbuffers = glGenRenderbuffers;
interface->fDeleteRenderbuffers = glDeleteRenderbuffers;
interface->fFramebufferRenderbuffer = glFramebufferRenderbuffer;
interface->fBindRenderbuffer = glBindRenderbuffer;
interface->fRenderbufferStorageMultisample = glRenderbufferStorageMultisample;
interface->fBlitFramebuffer = glBlitFramebuffer;
#else
GET_PROC(GenFramebuffers);
GET_PROC(GetFramebufferAttachmentParameteriv);
GET_PROC(GetRenderbufferParameteriv);
GET_PROC(BindFramebuffer);
GET_PROC(FramebufferTexture2D);
GET_PROC(CheckFramebufferStatus);
GET_PROC(DeleteFramebuffers);
GET_PROC(RenderbufferStorage);
GET_PROC(GenRenderbuffers);
GET_PROC(DeleteRenderbuffers);
GET_PROC(FramebufferRenderbuffer);
GET_PROC(BindRenderbuffer);
GET_PROC(RenderbufferStorageMultisample);
GET_PROC(BlitFramebuffer);
#endif
} else {
if (extensions.has("GL_EXT_framebuffer_object")) {
#if GL_EXT_framebuffer_object
interface->fGenFramebuffers = glGenFramebuffersEXT;
interface->fGetFramebufferAttachmentParameteriv = glGetFramebufferAttachmentParameterivEXT;
interface->fGetRenderbufferParameteriv = glGetRenderbufferParameterivEXT;
interface->fBindFramebuffer = glBindFramebufferEXT;
interface->fFramebufferTexture2D = glFramebufferTexture2DEXT;
interface->fCheckFramebufferStatus = glCheckFramebufferStatusEXT;
interface->fDeleteFramebuffers = glDeleteFramebuffersEXT;
interface->fRenderbufferStorage = glRenderbufferStorageEXT;
interface->fGenRenderbuffers = glGenRenderbuffersEXT;
interface->fDeleteRenderbuffers = glDeleteRenderbuffersEXT;
interface->fFramebufferRenderbuffer = glFramebufferRenderbufferEXT;
interface->fBindRenderbuffer = glBindRenderbufferEXT;
#else
GET_PROC_SUFFIX(GenFramebuffers, EXT);
GET_PROC_SUFFIX(GetFramebufferAttachmentParameteriv, EXT);
GET_PROC_SUFFIX(GetRenderbufferParameteriv, EXT);
GET_PROC_SUFFIX(BindFramebuffer, EXT);
GET_PROC_SUFFIX(FramebufferTexture2D, EXT);
GET_PROC_SUFFIX(CheckFramebufferStatus, EXT);
GET_PROC_SUFFIX(DeleteFramebuffers, EXT);
GET_PROC_SUFFIX(RenderbufferStorage, EXT);
GET_PROC_SUFFIX(GenRenderbuffers, EXT);
GET_PROC_SUFFIX(DeleteRenderbuffers, EXT);
GET_PROC_SUFFIX(FramebufferRenderbuffer, EXT);
GET_PROC_SUFFIX(BindRenderbuffer, EXT);
#endif
}
if (extensions.has("GL_EXT_framebuffer_multisample")) {
#if GL_EXT_framebuffer_multisample
interface->fRenderbufferStorageMultisample = glRenderbufferStorageMultisampleEXT;
#else
GET_PROC_SUFFIX(RenderbufferStorageMultisample, EXT);
#endif
}
if (extensions.has("GL_EXT_framebuffer_blit")) {
#if GL_EXT_framebuffer_blit
interface->fBlitFramebuffer = glBlitFramebufferEXT;
#else
GET_PROC_SUFFIX(BlitFramebuffer, EXT);
#endif
}
}
if (ver >= GR_GL_VER(3,3) || extensions.has("GL_ARB_blend_func_extended")) {
// ARB extension doesn't use the ARB suffix on the function name
#if GL_VERSION_3_3 || GL_ARB_blend_func_extended
interface->fBindFragDataLocationIndexed = glBindFragDataLocationIndexed;
#else
GET_PROC(BindFragDataLocationIndexed);
#endif
}
}
glInterface.get()->ref();
return glInterface.get();
}
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