1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #include "base/base_paths.h"
6 #include "base/files/file_path.h"
7 #include "base/logging.h"
8 #include "base/mac/foundation_util.h"
9 #include "base/native_library.h"
10 #include "base/path_service.h"
11 #include "base/threading/thread_restrictions.h"
12 #include "ui/gl/gl_bindings.h"
13 #include "ui/gl/gl_context_stub_with_extensions.h"
14 #include "ui/gl/gl_gl_api_implementation.h"
15 #include "ui/gl/gl_implementation.h"
16 #include "ui/gl/gl_osmesa_api_implementation.h"
20 const char kOpenGLFrameworkPath[] =
21 "/System/Library/Frameworks/OpenGL.framework/Versions/Current/OpenGL";
24 void GetAllowedGLImplementations(std::vector<GLImplementation>* impls) {
25 impls->push_back(kGLImplementationDesktopGL);
26 impls->push_back(kGLImplementationAppleGL);
27 impls->push_back(kGLImplementationOSMesaGL);
30 bool InitializeStaticGLBindings(GLImplementation implementation) {
31 // Prevent reinitialization with a different implementation. Once the gpu
32 // unit tests have initialized with kGLImplementationMock, we don't want to
33 // later switch to another GL implementation.
34 if (GetGLImplementation() != kGLImplementationNone)
37 // Allow the main thread or another to initialize these bindings
38 // after instituting restrictions on I/O. Going forward they will
39 // likely be used in the browser process on most platforms. The
40 // one-time initialization cost is small, between 2 and 5 ms.
41 base::ThreadRestrictions::ScopedAllowIO allow_io;
43 switch (implementation) {
44 case kGLImplementationOSMesaGL: {
45 // osmesa.so is located in the build directory. This code path is only
46 // valid in a developer build environment.
47 base::FilePath exe_path;
48 if (!PathService::Get(base::FILE_EXE, &exe_path)) {
49 LOG(ERROR) << "PathService::Get failed.";
52 base::FilePath bundle_path = base::mac::GetAppBundlePath(exe_path);
53 // Some unit test targets depend on osmesa but aren't built as app
54 // bundles. In that case, the .so is next to the executable.
55 if (bundle_path.empty())
56 bundle_path = exe_path;
57 base::FilePath build_dir_path = bundle_path.DirName();
58 base::FilePath osmesa_path = build_dir_path.Append("osmesa.so");
60 // When using OSMesa, just use OSMesaGetProcAddress to find entry points.
61 base::NativeLibrary library = base::LoadNativeLibrary(osmesa_path, NULL);
63 LOG(ERROR) << "osmesa.so not found at " << osmesa_path.value();
67 GLGetProcAddressProc get_proc_address =
68 reinterpret_cast<GLGetProcAddressProc>(
69 base::GetFunctionPointerFromNativeLibrary(
70 library, "OSMesaGetProcAddress"));
71 if (!get_proc_address) {
72 LOG(ERROR) << "OSMesaGetProcAddress not found.";
73 base::UnloadNativeLibrary(library);
77 SetGLGetProcAddressProc(get_proc_address);
78 AddGLNativeLibrary(library);
79 SetGLImplementation(kGLImplementationOSMesaGL);
81 InitializeStaticGLBindingsGL();
82 InitializeStaticGLBindingsOSMESA();
85 case kGLImplementationDesktopGL:
86 case kGLImplementationAppleGL: {
87 base::NativeLibrary library = base::LoadNativeLibrary(
88 base::FilePath(kOpenGLFrameworkPath), NULL);
90 LOG(ERROR) << "OpenGL framework not found";
94 AddGLNativeLibrary(library);
95 SetGLImplementation(implementation);
97 InitializeStaticGLBindingsGL();
100 case kGLImplementationMockGL: {
101 SetGLImplementation(kGLImplementationMockGL);
102 InitializeStaticGLBindingsGL();
112 bool InitializeDynamicGLBindings(GLImplementation implementation,
113 GLContext* context) {
114 switch (implementation) {
115 case kGLImplementationOSMesaGL:
116 InitializeDynamicGLBindingsGL(context);
117 InitializeDynamicGLBindingsOSMESA(context);
119 case kGLImplementationDesktopGL:
120 case kGLImplementationAppleGL:
121 InitializeDynamicGLBindingsGL(context);
123 case kGLImplementationMockGL:
125 scoped_refptr<GLContextStubWithExtensions> mock_context(
126 new GLContextStubWithExtensions());
127 mock_context->SetGLVersionString("3.0");
128 InitializeDynamicGLBindingsGL(mock_context.get());
130 InitializeDynamicGLBindingsGL(context);
139 void InitializeDebugGLBindings() {
140 InitializeDebugGLBindingsGL();
141 InitializeDebugGLBindingsOSMESA();
144 void ClearGLBindings() {
146 ClearGLBindingsOSMESA();
147 SetGLImplementation(kGLImplementationNone);
149 UnloadGLNativeLibraries();
152 bool GetGLWindowSystemBindingInfo(GLWindowSystemBindingInfo* info) {