1 /*
2  * Copyright 2011 Google Inc.
3  *
4  * Use of this source code is governed by a BSD-style license that can be
5  * found in the LICENSE file.
6  */
7 #include "SkTypes.h"
8 #if defined(SK_BUILD_FOR_MAC)
9 
10 
11 #include "gl/GrGLInterface.h"
12 #include "gl/GrGLAssembleInterface.h"
13 
14 #include <dlfcn.h>
15 
16 class GLLoader {
17 public:
GLLoader()18     GLLoader() {
19         fLibrary = dlopen(
20                     "/System/Library/Frameworks/OpenGL.framework/Versions/A/Libraries/libGL.dylib",
21                     RTLD_LAZY);
22     }
23 
~GLLoader()24     ~GLLoader() {
25         if (fLibrary) {
26             dlclose(fLibrary);
27         }
28     }
29 
handle() const30     void* handle() const {
31         return nullptr == fLibrary ? RTLD_DEFAULT : fLibrary;
32     }
33 
34 private:
35     void* fLibrary;
36 };
37 
38 class GLProcGetter {
39 public:
GLProcGetter()40     GLProcGetter() {}
41 
getProc(const char name[]) const42     GrGLFuncPtr getProc(const char name[]) const {
43         return (GrGLFuncPtr) dlsym(fLoader.handle(), name);
44     }
45 
46 private:
47     GLLoader fLoader;
48 };
49 
mac_get_gl_proc(void * ctx,const char name[])50 static GrGLFuncPtr mac_get_gl_proc(void* ctx, const char name[]) {
51     SkASSERT(ctx);
52     const GLProcGetter* getter = (const GLProcGetter*) ctx;
53     return getter->getProc(name);
54 }
55 
GrGLMakeNativeInterface()56 sk_sp<const GrGLInterface> GrGLMakeNativeInterface() {
57     GLProcGetter getter;
58     return GrGLMakeAssembledGLInterface(&getter, mac_get_gl_proc);
59 }
60 
GrGLCreateNativeInterface()61 const GrGLInterface* GrGLCreateNativeInterface() { return GrGLMakeNativeInterface().release(); }
62 
63 #endif//defined(SK_BUILD_FOR_MAC)
64