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// Modified from chromium/src/webkit/glue/gl_bindings_skia_cmd_buffer.cc
// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// 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/GrGLAssembleInterface.h"
#include "gl/GrGLExtensions.h"
#include "gl/GrGLUtil.h"
#ifndef GL_GLEXT_PROTOTYPES
#define GL_GLEXT_PROTOTYPES
#endif
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>
#include <EGL/egl.h>
static GrGLInterface* create_es_interface(GrGLVersion version,
GrGLExtensions* extensions) {
if (version < GR_GL_VER(2,0)) {
return NULL;
}
GrGLInterface* interface = SkNEW(GrGLInterface);
interface->fStandard = kGLES_GrGLStandard;
GrGLInterface::Functions* functions = &interface->fFunctions;
functions->fActiveTexture = glActiveTexture;
functions->fAttachShader = glAttachShader;
functions->fBindAttribLocation = glBindAttribLocation;
functions->fBindBuffer = glBindBuffer;
functions->fBindTexture = glBindTexture;
functions->fBindVertexArray = glBindVertexArrayOES;
functions->fBlendColor = glBlendColor;
functions->fBlendFunc = glBlendFunc;
functions->fBufferData = glBufferData;
functions->fBufferSubData = glBufferSubData;
functions->fClear = glClear;
functions->fClearColor = glClearColor;
functions->fClearStencil = glClearStencil;
functions->fColorMask = glColorMask;
functions->fCompileShader = glCompileShader;
functions->fCompressedTexImage2D = glCompressedTexImage2D;
functions->fCopyTexSubImage2D = glCopyTexSubImage2D;
functions->fCreateProgram = glCreateProgram;
functions->fCreateShader = glCreateShader;
functions->fCullFace = glCullFace;
functions->fDeleteBuffers = glDeleteBuffers;
functions->fDeleteProgram = glDeleteProgram;
functions->fDeleteShader = glDeleteShader;
functions->fDeleteTextures = glDeleteTextures;
functions->fDeleteVertexArrays = glDeleteVertexArraysOES;
functions->fDepthMask = glDepthMask;
functions->fDisable = glDisable;
functions->fDisableVertexAttribArray = glDisableVertexAttribArray;
functions->fDrawArrays = glDrawArrays;
functions->fDrawElements = glDrawElements;
functions->fEnable = glEnable;
functions->fEnableVertexAttribArray = glEnableVertexAttribArray;
functions->fFinish = glFinish;
functions->fFlush = glFlush;
functions->fFrontFace = glFrontFace;
functions->fGenBuffers = glGenBuffers;
functions->fGenerateMipmap = glGenerateMipmap;
functions->fGenTextures = glGenTextures;
functions->fGenVertexArrays = glGenVertexArraysOES;
functions->fGetBufferParameteriv = glGetBufferParameteriv;
functions->fGetError = glGetError;
functions->fGetIntegerv = glGetIntegerv;
functions->fGetProgramInfoLog = glGetProgramInfoLog;
functions->fGetProgramiv = glGetProgramiv;
functions->fGetShaderInfoLog = glGetShaderInfoLog;
functions->fGetShaderiv = glGetShaderiv;
functions->fGetString = glGetString;
#if GL_ES_VERSION_3_0
functions->fGetStringi = glGetStringi;
#else
functions->fGetStringi = (GrGLGetStringiProc) eglGetProcAddress("glGetStringi");
#endif
functions->fGetUniformLocation = glGetUniformLocation;
functions->fLineWidth = glLineWidth;
functions->fLinkProgram = glLinkProgram;
functions->fPixelStorei = glPixelStorei;
functions->fReadPixels = glReadPixels;
functions->fScissor = glScissor;
#if GR_GL_USE_NEW_SHADER_SOURCE_SIGNATURE
functions->fShaderSource = (GrGLShaderSourceProc) glShaderSource;
#else
functions->fShaderSource = glShaderSource;
#endif
functions->fStencilFunc = glStencilFunc;
functions->fStencilFuncSeparate = glStencilFuncSeparate;
functions->fStencilMask = glStencilMask;
functions->fStencilMaskSeparate = glStencilMaskSeparate;
functions->fStencilOp = glStencilOp;
functions->fStencilOpSeparate = glStencilOpSeparate;
functions->fTexImage2D = glTexImage2D;
functions->fTexParameteri = glTexParameteri;
functions->fTexParameteriv = glTexParameteriv;
functions->fTexSubImage2D = glTexSubImage2D;
if (version >= GR_GL_VER(3,0)) {
#if GL_ES_VERSION_3_0
functions->fTexStorage2D = glTexStorage2D;
#else
functions->fTexStorage2D = (GrGLTexStorage2DProc) eglGetProcAddress("glTexStorage2D");
#endif
} else {
#if GL_EXT_texture_storage
functions->fTexStorage2D = glTexStorage2DEXT;
#else
functions->fTexStorage2D = (GrGLTexStorage2DProc) eglGetProcAddress("glTexStorage2DEXT");
#endif
}
#if GL_EXT_discard_framebuffer
functions->fDiscardFramebuffer = glDiscardFramebufferEXT;
#endif
functions->fUniform1f = glUniform1f;
functions->fUniform1i = glUniform1i;
functions->fUniform1fv = glUniform1fv;
functions->fUniform1iv = glUniform1iv;
functions->fUniform2f = glUniform2f;
functions->fUniform2i = glUniform2i;
functions->fUniform2fv = glUniform2fv;
functions->fUniform2iv = glUniform2iv;
functions->fUniform3f = glUniform3f;
functions->fUniform3i = glUniform3i;
functions->fUniform3fv = glUniform3fv;
functions->fUniform3iv = glUniform3iv;
functions->fUniform4f = glUniform4f;
functions->fUniform4i = glUniform4i;
functions->fUniform4fv = glUniform4fv;
functions->fUniform4iv = glUniform4iv;
functions->fUniformMatrix2fv = glUniformMatrix2fv;
functions->fUniformMatrix3fv = glUniformMatrix3fv;
functions->fUniformMatrix4fv = glUniformMatrix4fv;
functions->fUseProgram = glUseProgram;
functions->fVertexAttrib4fv = glVertexAttrib4fv;
functions->fVertexAttribPointer = glVertexAttribPointer;
functions->fViewport = glViewport;
functions->fBindFramebuffer = glBindFramebuffer;
functions->fBindRenderbuffer = glBindRenderbuffer;
functions->fCheckFramebufferStatus = glCheckFramebufferStatus;
functions->fDeleteFramebuffers = glDeleteFramebuffers;
functions->fDeleteRenderbuffers = glDeleteRenderbuffers;
functions->fFramebufferRenderbuffer = glFramebufferRenderbuffer;
functions->fFramebufferTexture2D = glFramebufferTexture2D;
if (version >= GR_GL_VER(3,0)) {
#if GL_ES_VERSION_3_0
functions->fRenderbufferStorageMultisample = glRenderbufferStorageMultisample;
functions->fBlitFramebuffer = glBlitFramebuffer;
#else
functions->fRenderbufferStorageMultisample = (GrGLRenderbufferStorageMultisampleProc) eglGetProcAddress("glRenderbufferStorageMultisample");
functions->fBlitFramebuffer = (GrGLBlitFramebufferProc) eglGetProcAddress("glBlitFramebuffer");
#endif
}
if (extensions->has("GL_EXT_multisampled_render_to_texture")) {
#if GL_EXT_multisampled_render_to_texture
functions->fFramebufferTexture2DMultisample = glFramebufferTexture2DMultisampleEXT;
functions->fRenderbufferStorageMultisampleES2EXT = glRenderbufferStorageMultisampleEXT;
#else
functions->fFramebufferTexture2DMultisample = (GrGLFramebufferTexture2DMultisampleProc) eglGetProcAddress("glFramebufferTexture2DMultisampleEXT");
functions->fRenderbufferStorageMultisampleES2EXT = (GrGLRenderbufferStorageMultisampleProc) eglGetProcAddress("glRenderbufferStorageMultisampleEXT");
#endif
} else if (extensions->has("GL_IMG_multisampled_render_to_texture")) {
#if GL_IMG_multisampled_render_to_texture
functions->fFramebufferTexture2DMultisample = glFramebufferTexture2DMultisampleIMG;
functions->fRenderbufferStorageMultisampleES2EXT = glRenderbufferStorageMultisampleIMG;
#else
functions->fFramebufferTexture2DMultisample = (GrGLFramebufferTexture2DMultisampleProc) eglGetProcAddress("glFramebufferTexture2DMultisampleIMG");
functions->fRenderbufferStorageMultisampleES2EXT = (GrGLRenderbufferStorageMultisampleProc) eglGetProcAddress("glRenderbufferStorageMultisampleIMG");
#endif
}
functions->fGenFramebuffers = glGenFramebuffers;
functions->fGenRenderbuffers = glGenRenderbuffers;
functions->fGetFramebufferAttachmentParameteriv = glGetFramebufferAttachmentParameteriv;
functions->fGetRenderbufferParameteriv = glGetRenderbufferParameteriv;
functions->fRenderbufferStorage = glRenderbufferStorage;
#if GL_OES_mapbuffer
functions->fMapBuffer = glMapBufferOES;
functions->fUnmapBuffer = glUnmapBufferOES;
#else
functions->fMapBuffer = (GrGLMapBufferProc) eglGetProcAddress("glMapBufferOES");
functions->fUnmapBuffer = (GrGLUnmapBufferProc) eglGetProcAddress("glUnmapBufferOES");
#endif
if (version >= GR_GL_VER(3,0)) {
#if GL_ES_VERSION_3_0
functions->fMapBufferRange = glMapBufferRange;
functions->fFlushMappedBufferRange = glFlushMappedBufferRange;
#else
functions->fMapBufferRange = (GrGLMapBufferRangeProc) eglGetProcAddress("glMapBufferRange");
functions->fFlushMappedBufferRange = (GrGLFlushMappedBufferRangeProc) eglGetProcAddress("glFlushMappedBufferRange");
#endif
} else if (extensions->has("GL_EXT_map_buffer_range")) {
#if GL_EXT_map_buffer_range
functions->fMapBufferRange = glMapBufferRangeEXT;
functions->fFlushMappedBufferRange = glFlushMappedBufferRangeEXT;
#else
functions->fMapBufferRange = (GrGLMapBufferRangeProc) eglGetProcAddress("glMapBufferRangeEXT");
functions->fFlushMappedBufferRange = (GrGLFlushMappedBufferRangeProc) eglGetProcAddress("glFlushMappedBufferRangeEXT");
#endif
}
if (extensions->has("GL_EXT_debug_marker")) {
functions->fInsertEventMarker = (GrGLInsertEventMarkerProc) eglGetProcAddress("glInsertEventMarker");
functions->fPushGroupMarker = (GrGLInsertEventMarkerProc) eglGetProcAddress("glPushGroupMarker");
functions->fPopGroupMarker = (GrGLPopGroupMarkerProc) eglGetProcAddress("glPopGroupMarker");
// The below check is here because a device has been found that has the extension string but
// returns NULL from the eglGetProcAddress for the functions
if (NULL == functions->fInsertEventMarker ||
NULL == functions->fPushGroupMarker ||
NULL == functions->fPopGroupMarker) {
extensions->remove("GL_EXT_debug_marker");
}
}
#if GL_ES_VERSION_3_0
functions->fInvalidateFramebuffer = glInvalidateFramebuffer;
functions->fInvalidateSubFramebuffer = glInvalidateSubFramebuffer;
#else
functions->fInvalidateFramebuffer = (GrGLInvalidateFramebufferProc) eglGetProcAddress("glInvalidateFramebuffer");
functions->fInvalidateSubFramebuffer = (GrGLInvalidateSubFramebufferProc) eglGetProcAddress("glInvalidateSubFramebuffer");
#endif
functions->fInvalidateBufferData = (GrGLInvalidateBufferDataProc) eglGetProcAddress("glInvalidateBufferData");
functions->fInvalidateBufferSubData = (GrGLInvalidateBufferSubDataProc) eglGetProcAddress("glInvalidateBufferSubData");
functions->fInvalidateTexImage = (GrGLInvalidateTexImageProc) eglGetProcAddress("glInvalidateTexImage");
functions->fInvalidateTexSubImage = (GrGLInvalidateTexSubImageProc) eglGetProcAddress("glInvalidateTexSubImage");
return interface;
}
static GrGLFuncPtr android_get_gl_proc(void* ctx, const char name[]) {
SkASSERT(NULL == ctx);
return eglGetProcAddress(name);
}
static const GrGLInterface* create_desktop_interface() {
return GrGLAssembleGLInterface(NULL, android_get_gl_proc);
}
const GrGLInterface* GrGLCreateNativeInterface() {
const char* verStr = reinterpret_cast<const char*>(glGetString(GR_GL_VERSION));
GrGLStandard standard = GrGLGetStandardInUseFromString(verStr);
if (kGLES_GrGLStandard == standard) {
GrGLVersion version = GrGLGetVersionFromString(verStr);
GrGLExtensions extensions;
GrGLGetStringiProc getStringi = (GrGLGetStringiProc) eglGetProcAddress("glGetStringi");
if (!extensions.init(standard, glGetString, getStringi, glGetIntegerv)) {
return NULL;
}
GrGLInterface* interface = create_es_interface(version, &extensions);
if (NULL != interface) {
interface->fExtensions.swap(&extensions);
}
return interface;
} else if (kGL_GrGLStandard == standard) {
return create_desktop_interface();
}
return NULL;
}
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