| // Copyright (c) 2012 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 <vector> |
| |
| #include "base/at_exit.h" |
| #include "base/base_paths.h" |
| #include "base/bind.h" |
| #include "base/command_line.h" |
| #include "base/file_path.h" |
| #include "base/logging.h" |
| #include "base/native_library.h" |
| #include "base/path_service.h" |
| #include "base/stringprintf.h" |
| #include "base/threading/thread_restrictions.h" |
| #include "ui/gl/gl_bindings.h" |
| #include "ui/gl/gl_implementation.h" |
| |
| #if defined(ENABLE_SWIFTSHADER) |
| #include "software_renderer.h" |
| #endif |
| |
| namespace gfx { |
| |
| namespace { |
| // This is the D3DX_SDK_VERSION for the last 'separate' DirectX SDK which |
| // is from June 2010. Since June 2012 Microsoft includes DirectX in the regular |
| // Windows SDK and the D3DX library has been deprecated. |
| const int kPinnedD3DXVersion = 43; |
| |
| void GL_BINDING_CALL MarshalClearDepthToClearDepthf(GLclampd depth) { |
| glClearDepthf(static_cast<GLclampf>(depth)); |
| } |
| |
| void GL_BINDING_CALL MarshalDepthRangeToDepthRangef(GLclampd z_near, |
| GLclampd z_far) { |
| glDepthRangef(static_cast<GLclampf>(z_near), static_cast<GLclampf>(z_far)); |
| } |
| |
| bool LoadD3DXLibrary(const FilePath& module_path, |
| const FilePath::StringType& name) { |
| base::NativeLibrary library = base::LoadNativeLibrary(FilePath(name), NULL); |
| if (!library) { |
| library = base::LoadNativeLibrary(module_path.Append(name), NULL); |
| if (!library) { |
| DVLOG(1) << name << " not found."; |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| } // namespace |
| |
| void GetAllowedGLImplementations(std::vector<GLImplementation>* impls) { |
| impls->push_back(kGLImplementationEGLGLES2); |
| impls->push_back(kGLImplementationDesktopGL); |
| impls->push_back(kGLImplementationOSMesaGL); |
| } |
| |
| bool InitializeGLBindings(GLImplementation implementation) { |
| // Prevent reinitialization with a different implementation. Once the gpu |
| // unit tests have initialized with kGLImplementationMock, we don't want to |
| // later switch to another GL implementation. |
| if (GetGLImplementation() != kGLImplementationNone) |
| return true; |
| |
| // Allow the main thread or another to initialize these bindings |
| // after instituting restrictions on I/O. Going forward they will |
| // likely be used in the browser process on most platforms. The |
| // one-time initialization cost is small, between 2 and 5 ms. |
| base::ThreadRestrictions::ScopedAllowIO allow_io; |
| |
| switch (implementation) { |
| case kGLImplementationOSMesaGL: { |
| FilePath module_path; |
| if (!PathService::Get(base::DIR_MODULE, &module_path)) { |
| LOG(ERROR) << "PathService::Get failed."; |
| return false; |
| } |
| |
| base::NativeLibrary library = base::LoadNativeLibrary( |
| module_path.Append(L"osmesa.dll"), NULL); |
| if (!library) { |
| DVLOG(1) << "osmesa.dll not found"; |
| return false; |
| } |
| |
| GLGetProcAddressProc get_proc_address = |
| reinterpret_cast<GLGetProcAddressProc>( |
| base::GetFunctionPointerFromNativeLibrary( |
| library, "OSMesaGetProcAddress")); |
| if (!get_proc_address) { |
| DLOG(ERROR) << "OSMesaGetProcAddress not found."; |
| base::UnloadNativeLibrary(library); |
| return false; |
| } |
| |
| SetGLGetProcAddressProc(get_proc_address); |
| AddGLNativeLibrary(library); |
| SetGLImplementation(kGLImplementationOSMesaGL); |
| |
| InitializeGLBindingsGL(); |
| InitializeGLBindingsOSMESA(); |
| break; |
| } |
| case kGLImplementationEGLGLES2: { |
| FilePath module_path; |
| if (!PathService::Get(base::DIR_MODULE, &module_path)) |
| return false; |
| |
| // Attempt to load D3DX and its dependencies using the default search path |
| // and if that fails, using an absolute path. This is to ensure these DLLs |
| // are loaded before ANGLE is loaded in case they are not in the default |
| // search path. |
| LoadD3DXLibrary(module_path, base::StringPrintf(L"d3dcompiler_%d.dll", |
| kPinnedD3DXVersion)); |
| LoadD3DXLibrary(module_path, base::StringPrintf(L"d3dx9_%d.dll", |
| kPinnedD3DXVersion)); |
| |
| FilePath gles_path; |
| const CommandLine* command_line = CommandLine::ForCurrentProcess(); |
| bool using_swift_shader = |
| command_line->GetSwitchValueASCII(switches::kUseGL) == "swiftshader"; |
| if (using_swift_shader) { |
| if (!command_line->HasSwitch(switches::kSwiftShaderPath)) |
| return false; |
| gles_path = |
| command_line->GetSwitchValuePath(switches::kSwiftShaderPath); |
| // Preload library |
| LoadLibrary(L"ddraw.dll"); |
| } else { |
| gles_path = module_path; |
| } |
| |
| // Load libglesv2.dll before libegl.dll because the latter is dependent on |
| // the former and if there is another version of libglesv2.dll in the dll |
| // search path, it will get loaded instead. |
| base::NativeLibrary gles_library = base::LoadNativeLibrary( |
| gles_path.Append(L"libglesv2.dll"), NULL); |
| if (!gles_library) { |
| DVLOG(1) << "libglesv2.dll not found"; |
| return false; |
| } |
| |
| // When using EGL, first try eglGetProcAddress and then Windows |
| // GetProcAddress on both the EGL and GLES2 DLLs. |
| base::NativeLibrary egl_library = base::LoadNativeLibrary( |
| gles_path.Append(L"libegl.dll"), NULL); |
| if (!egl_library) { |
| DVLOG(1) << "libegl.dll not found."; |
| base::UnloadNativeLibrary(gles_library); |
| return false; |
| } |
| |
| #if defined(ENABLE_SWIFTSHADER) |
| if (using_swift_shader) { |
| SetupSoftwareRenderer(gles_library); |
| } |
| #endif |
| |
| GLGetProcAddressProc get_proc_address = |
| reinterpret_cast<GLGetProcAddressProc>( |
| base::GetFunctionPointerFromNativeLibrary( |
| egl_library, "eglGetProcAddress")); |
| if (!get_proc_address) { |
| LOG(ERROR) << "eglGetProcAddress not found."; |
| base::UnloadNativeLibrary(egl_library); |
| base::UnloadNativeLibrary(gles_library); |
| return false; |
| } |
| |
| SetGLGetProcAddressProc(get_proc_address); |
| AddGLNativeLibrary(egl_library); |
| AddGLNativeLibrary(gles_library); |
| SetGLImplementation(kGLImplementationEGLGLES2); |
| |
| InitializeGLBindingsGL(); |
| InitializeGLBindingsEGL(); |
| |
| // These two functions take single precision float rather than double |
| // precision float parameters in GLES. |
| ::gfx::g_glClearDepth = MarshalClearDepthToClearDepthf; |
| ::gfx::g_glDepthRange = MarshalDepthRangeToDepthRangef; |
| break; |
| } |
| case kGLImplementationDesktopGL: { |
| // When using Windows OpenGL, first try wglGetProcAddress and then |
| // Windows GetProcAddress. |
| base::NativeLibrary library = base::LoadNativeLibrary( |
| FilePath(L"opengl32.dll"), NULL); |
| if (!library) { |
| DVLOG(1) << "opengl32.dll not found"; |
| return false; |
| } |
| |
| GLGetProcAddressProc get_proc_address = |
| reinterpret_cast<GLGetProcAddressProc>( |
| base::GetFunctionPointerFromNativeLibrary( |
| library, "wglGetProcAddress")); |
| if (!get_proc_address) { |
| LOG(ERROR) << "wglGetProcAddress not found."; |
| base::UnloadNativeLibrary(library); |
| return false; |
| } |
| |
| SetGLGetProcAddressProc(get_proc_address); |
| AddGLNativeLibrary(library); |
| SetGLImplementation(kGLImplementationDesktopGL); |
| |
| InitializeGLBindingsGL(); |
| InitializeGLBindingsWGL(); |
| break; |
| } |
| case kGLImplementationMockGL: { |
| SetGLGetProcAddressProc(GetMockGLProcAddress); |
| SetGLImplementation(kGLImplementationMockGL); |
| InitializeGLBindingsGL(); |
| break; |
| } |
| default: |
| return false; |
| } |
| |
| return true; |
| } |
| |
| bool InitializeGLExtensionBindings(GLImplementation implementation, |
| GLContext* context) { |
| switch (implementation) { |
| case kGLImplementationOSMesaGL: |
| InitializeGLExtensionBindingsGL(context); |
| InitializeGLExtensionBindingsOSMESA(context); |
| break; |
| case kGLImplementationEGLGLES2: |
| InitializeGLExtensionBindingsGL(context); |
| InitializeGLExtensionBindingsEGL(context); |
| break; |
| case kGLImplementationDesktopGL: |
| InitializeGLExtensionBindingsGL(context); |
| InitializeGLExtensionBindingsWGL(context); |
| break; |
| case kGLImplementationMockGL: |
| InitializeGLExtensionBindingsGL(context); |
| break; |
| default: |
| return false; |
| } |
| |
| return true; |
| } |
| |
| void InitializeDebugGLBindings() { |
| InitializeDebugGLBindingsEGL(); |
| InitializeDebugGLBindingsGL(); |
| InitializeDebugGLBindingsOSMESA(); |
| InitializeDebugGLBindingsWGL(); |
| } |
| |
| void ClearGLBindings() { |
| ClearGLBindingsEGL(); |
| ClearGLBindingsGL(); |
| ClearGLBindingsOSMESA(); |
| ClearGLBindingsWGL(); |
| SetGLImplementation(kGLImplementationNone); |
| UnloadGLNativeLibraries(); |
| } |
| |
| } // namespace gfx |