Common GrGLInterface OpenGL setup function.

src/gpu/gl/mac/GrGLCreateNativeInterface_mac.cpp

 
 /*
  * 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 "../GrGLUtil.h"
+#include "gl/GrGLAssembleInterface.h"
 
 #include <dlfcn.h>
 
-// We get the proc addresss of all GL functions dynamically because we sometimes link against
-// alternative GL implementations (e.g. MESA) in addition to the native GL implementation.
 class GLLoader {
 public:
     GLLoader() {
         fLibrary = dlopen(
                     "/System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGL.dylib",
                     RTLD_LAZY);
     }
+
     ~GLLoader() {
         if (NULL != fLibrary) {
             dlclose(fLibrary);
         }
     }
-    void* handle() {
+
+    void* handle() const {
         return NULL == fLibrary ? RTLD_DEFAULT : fLibrary;
     }
+
 private:
     void* fLibrary;
 };
 
-static void* GetProcAddress(const char* name) {
-    static GLLoader gLoader;
-    return dlsym(gLoader.handle(), name);
+class GLProcGetter {
+public:
+    GLProcGetter() {}
+    
+    GrGLFuncPtr getProc(const char name[]) const {
+        return (GrGLFuncPtr) dlsym(fLoader.handle(), name);
+    }
+
+private:
+    GLLoader fLoader;
+};
+
+static GrGLFuncPtr mac_get_gl_proc(void* ctx, const char name[]) {
+    SkASSERT(NULL != ctx);
+    const GLProcGetter* getter = (const GLProcGetter*) ctx;
+    return getter->getProc(name);
 }
 
-#define GET_PROC(name) (interface->fFunctions.f ## name = ((GrGL ## name ## Proc) GetProcAddress("gl" #name)))
-#define GET_PROC_SUFFIX(name, suffix) (interface->fFunctions.f ## name = ((GrGL ## name ## Proc) GetProcAddress("gl" #name #suffix)))
-
 const GrGLInterface* GrGLCreateNativeInterface() {
-
-    GrGLGetStringProc glGetString = (GrGLGetStringProc) GetProcAddress("glGetString");
-    GrGLGetStringiProc glGetStringi = (GrGLGetStringiProc) GetProcAddress("glGetStringi");
-    GrGLGetIntegervProc glGetIntegerv = (GrGLGetIntegervProc) GetProcAddress("glGetIntegerv");
-
-    const char* verStr = (const char*) glGetString(GR_GL_VERSION);
-    GrGLVersion ver = GrGLGetVersionFromString(verStr);
-    GrGLExtensions extensions;
-    if (!extensions.init(kGL_GrGLStandard, glGetString, glGetStringi, glGetIntegerv)) {
-        return NULL;
-    }
-
-    GrGLInterface* interface = SkNEW(GrGLInterface);
-    interface->fStandard = kGL_GrGLStandard;
-
-    GET_PROC(ActiveTexture);
-    GET_PROC(AttachShader);
-    GET_PROC(BeginQuery);
-    GET_PROC(BindAttribLocation);
-    GET_PROC(BindBuffer);
-    if (ver >= GR_GL_VER(3,0)) {
-        GET_PROC(BindFragDataLocation);
-    }
-    GET_PROC(BindTexture);
-    GET_PROC(BlendFunc);
-
-    if (ver >= GR_GL_VER(1,4) ||
-        extensions.has("GL_ARB_imaging") ||
-        extensions.has("GL_EXT_blend_color")) {
-        GET_PROC(BlendColor);
-    }
-
-    GET_PROC(BufferData);
-    GET_PROC(BufferSubData);
-    GET_PROC(Clear);
-    GET_PROC(ClearColor);
-    GET_PROC(ClearStencil);
-    GET_PROC(ColorMask);
-    GET_PROC(CompileShader);
-    GET_PROC(CompressedTexImage2D);
-    GET_PROC(CopyTexSubImage2D);
-    GET_PROC(CreateProgram);
-    GET_PROC(CreateShader);
-    GET_PROC(CullFace);
-    GET_PROC(DeleteBuffers);
-    GET_PROC(DeleteProgram);
-    GET_PROC(DeleteQueries);
-    GET_PROC(DeleteShader);
-    GET_PROC(DeleteTextures);
-    GET_PROC(DepthMask);
-    GET_PROC(Disable);
-    GET_PROC(DisableVertexAttribArray);
-    GET_PROC(DrawArrays);
-    GET_PROC(DrawBuffer);
-    GET_PROC(DrawBuffers);
-    GET_PROC(DrawElements);
-    GET_PROC(Enable);
-    GET_PROC(EnableVertexAttribArray);
-    GET_PROC(EndQuery);
-    GET_PROC(Finish);
-    GET_PROC(Flush);
-    GET_PROC(FrontFace);
-    GET_PROC(GenBuffers);
-    GET_PROC(GenerateMipmap);
-    GET_PROC(GenQueries);
-    GET_PROC(GetBufferParameteriv);
-    GET_PROC(GetError);
-    GET_PROC(GetIntegerv);
-    GET_PROC(GetProgramInfoLog);
-    GET_PROC(GetProgramiv);
-    GET_PROC(GetQueryiv);
-    GET_PROC(GetQueryObjectiv);
-    GET_PROC(GetQueryObjectuiv);
-    GET_PROC(GetShaderInfoLog);
-    GET_PROC(GetShaderiv);
-    GET_PROC(GetString);
-    GET_PROC(GetStringi);
-    GET_PROC(GetTexLevelParameteriv);
-    GET_PROC(GenTextures);
-    GET_PROC(GetUniformLocation);
-    GET_PROC(LineWidth);
-    GET_PROC(LinkProgram);
-    GET_PROC(MapBuffer);
-    if (extensions.has("GL_EXT_direct_state_access")) {
-        GET_PROC_SUFFIX(MatrixLoadf, EXT);
-        GET_PROC_SUFFIX(MatrixLoadIdentity, EXT);
-    }
-    GET_PROC(PixelStorei);
-    GET_PROC(ReadBuffer);
-    GET_PROC(ReadPixels);
-    GET_PROC(Scissor);
-    GET_PROC(ShaderSource);
-    GET_PROC(StencilFunc);
-    GET_PROC(StencilFuncSeparate);
-    GET_PROC(StencilMask);
-    GET_PROC(StencilMaskSeparate);
-    GET_PROC(StencilOp);
-    GET_PROC(StencilOpSeparate);
-    GET_PROC(TexImage2D);
-    GET_PROC(TexParameteri);
-    GET_PROC(TexParameteriv);
-    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);
-    }
-    GET_PROC(TexSubImage2D);
-    GET_PROC(Uniform1f);
-    GET_PROC(Uniform1i);
-    GET_PROC(Uniform1fv);
-    GET_PROC(Uniform1iv);
-    GET_PROC(Uniform2f);
-    GET_PROC(Uniform2i);
-    GET_PROC(Uniform2fv);
-    GET_PROC(Uniform2iv);
-    GET_PROC(Uniform3f);
-    GET_PROC(Uniform3i);
-    GET_PROC(Uniform3fv);
-    GET_PROC(Uniform3iv);
-    GET_PROC(Uniform4f);
-    GET_PROC(Uniform4i);
-    GET_PROC(Uniform4fv);
-    GET_PROC(Uniform4iv);
-    GET_PROC(Uniform4fv);
-    GET_PROC(UniformMatrix2fv);
-    GET_PROC(UniformMatrix3fv);
-    GET_PROC(UniformMatrix4fv);
-    GET_PROC(UnmapBuffer);
-    GET_PROC(UseProgram);
-    GET_PROC(VertexAttrib4fv);
-    GET_PROC(VertexAttribPointer);
-    GET_PROC(Viewport);
-
-    if (ver >= GR_GL_VER(3,0) || extensions.has("GL_ARB_vertex_array_object")) {
-        // no ARB suffix for GL_ARB_vertex_array_object
-        GET_PROC(BindVertexArray);
-        GET_PROC(DeleteVertexArrays);
-        GET_PROC(GenVertexArrays);
-    }
-
-    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
-        GET_PROC(QueryCounter);
-        GET_PROC(GetQueryObjecti64v);
-        GET_PROC(GetQueryObjectui64v);
-    } else if (extensions.has("GL_EXT_timer_query")) {
-        GET_PROC_SUFFIX(GetQueryObjecti64v, EXT);
-        GET_PROC_SUFFIX(GetQueryObjectui64v, EXT);
-    }
-
-    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
-            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);
-    } else {
-        if (extensions.has("GL_EXT_framebuffer_object")) {
-            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);
-        }
-        if (extensions.has("GL_EXT_framebuffer_multisample")) {
-            GET_PROC_SUFFIX(RenderbufferStorageMultisample, EXT);
-        }
-        if (extensions.has("GL_EXT_framebuffer_blit")) {
-            GET_PROC_SUFFIX(BlitFramebuffer, EXT);
-        }
-    }
-    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
-        GET_PROC(BindFragDataLocationIndexed);
-    }
-
-    if (extensions.has("GL_EXT_debug_marker")) {
-        GET_PROC_SUFFIX(InsertEventMarker, EXT);
-        GET_PROC_SUFFIX(PushGroupMarker, EXT);
-        GET_PROC_SUFFIX(PopGroupMarker, EXT);
-    }
-
-    if (ver >= GR_GL_VER(4,3) || extensions.has("GL_ARB_invalidate_subdata")) {
-        GET_PROC(InvalidateBufferData);
-        GET_PROC(InvalidateBufferSubData);
-        GET_PROC(InvalidateFramebuffer);
-        GET_PROC(InvalidateSubFramebuffer);
-        GET_PROC(InvalidateTexImage);
-        GET_PROC(InvalidateTexSubImage);
-    }
-
-    interface->fExtensions.swap(&extensions);
-    return interface;
+    GLProcGetter getter;
+    return GrGLAssembleGLInterface(&getter, mac_get_gl_proc);
 }