michael@0: 
michael@0: /*
michael@0:  * Copyright 2011 Google Inc.
michael@0:  *
michael@0:  * Use of this source code is governed by a BSD-style license that can be
michael@0:  * found in the LICENSE file.
michael@0:  */
michael@0: 
michael@0: 
michael@0: #include "gl/GrGLInterface.h"
michael@0: #include "../GrGLUtil.h"
michael@0: 
michael@0: #include <dlfcn.h>
michael@0: 
michael@0: // We get the proc addresss of all GL functions dynamically because we sometimes link against
michael@0: // alternative GL implementations (e.g. MESA) in addition to the native GL implementation.
michael@0: class GLLoader {
michael@0: public:
michael@0:     GLLoader() {
michael@0:         fLibrary = dlopen(
michael@0:                     "/System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGL.dylib",
michael@0:                     RTLD_LAZY);
michael@0:     }
michael@0:     ~GLLoader() {
michael@0:         if (NULL != fLibrary) {
michael@0:             dlclose(fLibrary);
michael@0:         }
michael@0:     }
michael@0:     void* handle() {
michael@0:         return NULL == fLibrary ? RTLD_DEFAULT : fLibrary;
michael@0:     }
michael@0: private:
michael@0:     void* fLibrary;
michael@0: };
michael@0: 
michael@0: static void* GetProcAddress(const char* name) {
michael@0:     static GLLoader gLoader;
michael@0:     return dlsym(gLoader.handle(), name);
michael@0: }
michael@0: 
michael@0: #define GET_PROC(name) (interface->fFunctions.f ## name = ((GrGL ## name ## Proc) GetProcAddress("gl" #name)))
michael@0: #define GET_PROC_SUFFIX(name, suffix) (interface->fFunctions.f ## name = ((GrGL ## name ## Proc) GetProcAddress("gl" #name #suffix)))
michael@0: 
michael@0: const GrGLInterface* GrGLCreateNativeInterface() {
michael@0: 
michael@0:     GrGLGetStringProc glGetString = (GrGLGetStringProc) GetProcAddress("glGetString");
michael@0:     GrGLGetStringiProc glGetStringi = (GrGLGetStringiProc) GetProcAddress("glGetStringi");
michael@0:     GrGLGetIntegervProc glGetIntegerv = (GrGLGetIntegervProc) GetProcAddress("glGetIntegerv");
michael@0: 
michael@0:     const char* verStr = (const char*) glGetString(GR_GL_VERSION);
michael@0:     GrGLVersion ver = GrGLGetVersionFromString(verStr);
michael@0:     GrGLExtensions extensions;
michael@0:     if (!extensions.init(kGL_GrGLStandard, glGetString, glGetStringi, glGetIntegerv)) {
michael@0:         return NULL;
michael@0:     }
michael@0: 
michael@0:     GrGLInterface* interface = SkNEW(GrGLInterface);
michael@0:     interface->fStandard = kGL_GrGLStandard;
michael@0: 
michael@0:     GET_PROC(ActiveTexture);
michael@0:     GET_PROC(AttachShader);
michael@0:     GET_PROC(BeginQuery);
michael@0:     GET_PROC(BindAttribLocation);
michael@0:     GET_PROC(BindBuffer);
michael@0:     if (ver >= GR_GL_VER(3,0)) {
michael@0:         GET_PROC(BindFragDataLocation);
michael@0:     }
michael@0:     GET_PROC(BindTexture);
michael@0:     GET_PROC(BlendFunc);
michael@0: 
michael@0:     if (ver >= GR_GL_VER(1,4) ||
michael@0:         extensions.has("GL_ARB_imaging") ||
michael@0:         extensions.has("GL_EXT_blend_color")) {
michael@0:         GET_PROC(BlendColor);
michael@0:     }
michael@0: 
michael@0:     GET_PROC(BufferData);
michael@0:     GET_PROC(BufferSubData);
michael@0:     GET_PROC(Clear);
michael@0:     GET_PROC(ClearColor);
michael@0:     GET_PROC(ClearStencil);
michael@0:     GET_PROC(ColorMask);
michael@0:     GET_PROC(CompileShader);
michael@0:     GET_PROC(CompressedTexImage2D);
michael@0:     GET_PROC(CopyTexSubImage2D);
michael@0:     GET_PROC(CreateProgram);
michael@0:     GET_PROC(CreateShader);
michael@0:     GET_PROC(CullFace);
michael@0:     GET_PROC(DeleteBuffers);
michael@0:     GET_PROC(DeleteProgram);
michael@0:     GET_PROC(DeleteQueries);
michael@0:     GET_PROC(DeleteShader);
michael@0:     GET_PROC(DeleteTextures);
michael@0:     GET_PROC(DepthMask);
michael@0:     GET_PROC(Disable);
michael@0:     GET_PROC(DisableVertexAttribArray);
michael@0:     GET_PROC(DrawArrays);
michael@0:     GET_PROC(DrawBuffer);
michael@0:     GET_PROC(DrawBuffers);
michael@0:     GET_PROC(DrawElements);
michael@0:     GET_PROC(Enable);
michael@0:     GET_PROC(EnableVertexAttribArray);
michael@0:     GET_PROC(EndQuery);
michael@0:     GET_PROC(Finish);
michael@0:     GET_PROC(Flush);
michael@0:     GET_PROC(FrontFace);
michael@0:     GET_PROC(GenBuffers);
michael@0:     GET_PROC(GenerateMipmap);
michael@0:     GET_PROC(GenQueries);
michael@0:     GET_PROC(GetBufferParameteriv);
michael@0:     GET_PROC(GetError);
michael@0:     GET_PROC(GetIntegerv);
michael@0:     GET_PROC(GetProgramInfoLog);
michael@0:     GET_PROC(GetProgramiv);
michael@0:     GET_PROC(GetQueryiv);
michael@0:     GET_PROC(GetQueryObjectiv);
michael@0:     GET_PROC(GetQueryObjectuiv);
michael@0:     GET_PROC(GetShaderInfoLog);
michael@0:     GET_PROC(GetShaderiv);
michael@0:     GET_PROC(GetString);
michael@0:     GET_PROC(GetStringi);
michael@0:     GET_PROC(GetTexLevelParameteriv);
michael@0:     GET_PROC(GenTextures);
michael@0:     GET_PROC(GetUniformLocation);
michael@0:     GET_PROC(LineWidth);
michael@0:     GET_PROC(LinkProgram);
michael@0:     GET_PROC(LoadIdentity);
michael@0:     GET_PROC(LoadMatrixf);
michael@0:     GET_PROC(MapBuffer);
michael@0:     GET_PROC(MatrixMode);
michael@0:     GET_PROC(PixelStorei);
michael@0:     GET_PROC(ReadBuffer);
michael@0:     GET_PROC(ReadPixels);
michael@0:     GET_PROC(Scissor);
michael@0:     GET_PROC(ShaderSource);
michael@0:     GET_PROC(StencilFunc);
michael@0:     GET_PROC(StencilFuncSeparate);
michael@0:     GET_PROC(StencilMask);
michael@0:     GET_PROC(StencilMaskSeparate);
michael@0:     GET_PROC(StencilOp);
michael@0:     GET_PROC(StencilOpSeparate);
michael@0:     GET_PROC(TexGenfv);
michael@0:     GET_PROC(TexGeni);
michael@0:     GET_PROC(TexImage2D);
michael@0:     GET_PROC(TexParameteri);
michael@0:     GET_PROC(TexParameteriv);
michael@0:     if (ver >= GR_GL_VER(4,2) || extensions.has("GL_ARB_texture_storage")) {
michael@0:         GET_PROC(TexStorage2D);
michael@0:     } else if (extensions.has("GL_EXT_texture_storage")) {
michael@0:         GET_PROC_SUFFIX(TexStorage2D, EXT);
michael@0:     }
michael@0:     GET_PROC(TexSubImage2D);
michael@0:     GET_PROC(Uniform1f);
michael@0:     GET_PROC(Uniform1i);
michael@0:     GET_PROC(Uniform1fv);
michael@0:     GET_PROC(Uniform1iv);
michael@0:     GET_PROC(Uniform2f);
michael@0:     GET_PROC(Uniform2i);
michael@0:     GET_PROC(Uniform2fv);
michael@0:     GET_PROC(Uniform2iv);
michael@0:     GET_PROC(Uniform3f);
michael@0:     GET_PROC(Uniform3i);
michael@0:     GET_PROC(Uniform3fv);
michael@0:     GET_PROC(Uniform3iv);
michael@0:     GET_PROC(Uniform4f);
michael@0:     GET_PROC(Uniform4i);
michael@0:     GET_PROC(Uniform4fv);
michael@0:     GET_PROC(Uniform4iv);
michael@0:     GET_PROC(Uniform4fv);
michael@0:     GET_PROC(UniformMatrix2fv);
michael@0:     GET_PROC(UniformMatrix3fv);
michael@0:     GET_PROC(UniformMatrix4fv);
michael@0:     GET_PROC(UnmapBuffer);
michael@0:     GET_PROC(UseProgram);
michael@0:     GET_PROC(VertexAttrib4fv);
michael@0:     GET_PROC(VertexAttribPointer);
michael@0:     GET_PROC(Viewport);
michael@0: 
michael@0:     if (ver >= GR_GL_VER(3,0) || extensions.has("GL_ARB_vertex_array_object")) {
michael@0:         // no ARB suffix for GL_ARB_vertex_array_object
michael@0:         GET_PROC(BindVertexArray);
michael@0:         GET_PROC(DeleteVertexArrays);
michael@0:         GET_PROC(GenVertexArrays);
michael@0:     }
michael@0: 
michael@0:     if (ver >= GR_GL_VER(3,3) || extensions.has("GL_ARB_timer_query")) {
michael@0:         // ARB extension doesn't use the ARB suffix on the function name
michael@0:         GET_PROC(QueryCounter);
michael@0:         GET_PROC(GetQueryObjecti64v);
michael@0:         GET_PROC(GetQueryObjectui64v);
michael@0:     } else if (extensions.has("GL_EXT_timer_query")) {
michael@0:         GET_PROC_SUFFIX(GetQueryObjecti64v, EXT);
michael@0:         GET_PROC_SUFFIX(GetQueryObjectui64v, EXT);
michael@0:     }
michael@0: 
michael@0:     if (ver >= GR_GL_VER(3,0) || extensions.has("GL_ARB_framebuffer_object")) {
michael@0:         // ARB extension doesn't use the ARB suffix on the function names
michael@0:             GET_PROC(GenFramebuffers);
michael@0:             GET_PROC(GetFramebufferAttachmentParameteriv);
michael@0:             GET_PROC(GetRenderbufferParameteriv);
michael@0:             GET_PROC(BindFramebuffer);
michael@0:             GET_PROC(FramebufferTexture2D);
michael@0:             GET_PROC(CheckFramebufferStatus);
michael@0:             GET_PROC(DeleteFramebuffers);
michael@0:             GET_PROC(RenderbufferStorage);
michael@0:             GET_PROC(GenRenderbuffers);
michael@0:             GET_PROC(DeleteRenderbuffers);
michael@0:             GET_PROC(FramebufferRenderbuffer);
michael@0:             GET_PROC(BindRenderbuffer);
michael@0:             GET_PROC(RenderbufferStorageMultisample);
michael@0:             GET_PROC(BlitFramebuffer);
michael@0:     } else {
michael@0:         if (extensions.has("GL_EXT_framebuffer_object")) {
michael@0:             GET_PROC_SUFFIX(GenFramebuffers, EXT);
michael@0:             GET_PROC_SUFFIX(GetFramebufferAttachmentParameteriv, EXT);
michael@0:             GET_PROC_SUFFIX(GetRenderbufferParameteriv, EXT);
michael@0:             GET_PROC_SUFFIX(BindFramebuffer, EXT);
michael@0:             GET_PROC_SUFFIX(FramebufferTexture2D, EXT);
michael@0:             GET_PROC_SUFFIX(CheckFramebufferStatus, EXT);
michael@0:             GET_PROC_SUFFIX(DeleteFramebuffers, EXT);
michael@0:             GET_PROC_SUFFIX(RenderbufferStorage, EXT);
michael@0:             GET_PROC_SUFFIX(GenRenderbuffers, EXT);
michael@0:             GET_PROC_SUFFIX(DeleteRenderbuffers, EXT);
michael@0:             GET_PROC_SUFFIX(FramebufferRenderbuffer, EXT);
michael@0:             GET_PROC_SUFFIX(BindRenderbuffer, EXT);
michael@0:         }
michael@0:         if (extensions.has("GL_EXT_framebuffer_multisample")) {
michael@0:             GET_PROC_SUFFIX(RenderbufferStorageMultisample, EXT);
michael@0:         }
michael@0:         if (extensions.has("GL_EXT_framebuffer_blit")) {
michael@0:             GET_PROC_SUFFIX(BlitFramebuffer, EXT);
michael@0:         }
michael@0:     }
michael@0:     if (ver >= GR_GL_VER(3,3) || extensions.has("GL_ARB_blend_func_extended")) {
michael@0:         // ARB extension doesn't use the ARB suffix on the function name
michael@0:         GET_PROC(BindFragDataLocationIndexed);
michael@0:     }
michael@0: 
michael@0:     if (extensions.has("GL_EXT_debug_marker")) {
michael@0:         GET_PROC_SUFFIX(InsertEventMarker, EXT);
michael@0:         GET_PROC_SUFFIX(PushGroupMarker, EXT);
michael@0:         GET_PROC_SUFFIX(PopGroupMarker, EXT);
michael@0:     }
michael@0: 
michael@0:     interface->fExtensions.swap(&extensions);
michael@0:     return interface;
michael@0: }