| // 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/base_paths.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/threading/thread_restrictions.h" |
| #include "ui/gl/gl_bindings.h" |
| #include "ui/gl/gl_implementation.h" |
| #include "ui/gl/gl_switches.h" |
| |
| namespace gfx { |
| namespace { |
| |
| // TODO(piman): it should be Desktop GL marshalling from double to float. Today |
| // on native GLES, we do float->double->float. |
| 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)); |
| } |
| |
| // Load a library, printing an error message on failure. |
| base::NativeLibrary LoadLibrary(const FilePath& filename) { |
| std::string error; |
| base::NativeLibrary library = base::LoadNativeLibrary(filename, |
| &error); |
| if (!library) { |
| DVLOG(1) << "Failed to load " << filename.MaybeAsASCII() << ": " << error; |
| return NULL; |
| } |
| return library; |
| } |
| |
| base::NativeLibrary LoadLibrary(const char* filename) { |
| return LoadLibrary(FilePath(filename)); |
| } |
| |
| } // namespace |
| |
| void GetAllowedGLImplementations(std::vector<GLImplementation>* impls) { |
| impls->push_back(kGLImplementationDesktopGL); |
| impls->push_back(kGLImplementationEGLGLES2); |
| 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 = LoadLibrary( |
| module_path.Append("libosmesa.so")); |
| if (!library) |
| return false; |
| |
| GLGetProcAddressProc get_proc_address = |
| reinterpret_cast<GLGetProcAddressProc>( |
| base::GetFunctionPointerFromNativeLibrary( |
| library, "OSMesaGetProcAddress")); |
| if (!get_proc_address) { |
| LOG(ERROR) << "OSMesaGetProcAddress not found."; |
| base::UnloadNativeLibrary(library); |
| return false; |
| } |
| |
| SetGLGetProcAddressProc(get_proc_address); |
| AddGLNativeLibrary(library); |
| SetGLImplementation(kGLImplementationOSMesaGL); |
| |
| InitializeGLBindingsGL(); |
| InitializeGLBindingsOSMESA(); |
| break; |
| } |
| case kGLImplementationDesktopGL: { |
| base::NativeLibrary library = NULL; |
| const CommandLine* command_line = CommandLine::ForCurrentProcess(); |
| |
| if (command_line->HasSwitch(switches::kTestGLLib)) |
| library = LoadLibrary(command_line->GetSwitchValueASCII( |
| switches::kTestGLLib).c_str()); |
| |
| if (!library) { |
| #if defined(OS_OPENBSD) |
| library = LoadLibrary("libGL.so"); |
| #else |
| library = LoadLibrary("libGL.so.1"); |
| #endif |
| } |
| |
| if (!library) |
| return false; |
| |
| GLGetProcAddressProc get_proc_address = |
| reinterpret_cast<GLGetProcAddressProc>( |
| base::GetFunctionPointerFromNativeLibrary( |
| library, "glXGetProcAddress")); |
| if (!get_proc_address) { |
| LOG(ERROR) << "glxGetProcAddress not found."; |
| base::UnloadNativeLibrary(library); |
| return false; |
| } |
| |
| SetGLGetProcAddressProc(get_proc_address); |
| AddGLNativeLibrary(library); |
| SetGLImplementation(kGLImplementationDesktopGL); |
| |
| InitializeGLBindingsGL(); |
| InitializeGLBindingsGLX(); |
| break; |
| } |
| case kGLImplementationEGLGLES2: { |
| base::NativeLibrary gles_library = LoadLibrary("libGLESv2.so.2"); |
| if (!gles_library) |
| return false; |
| base::NativeLibrary egl_library = LoadLibrary("libEGL.so.1"); |
| if (!egl_library) { |
| base::UnloadNativeLibrary(gles_library); |
| return false; |
| } |
| |
| 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 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 kGLImplementationDesktopGL: |
| InitializeGLExtensionBindingsGL(context); |
| InitializeGLExtensionBindingsGLX(context); |
| break; |
| case kGLImplementationEGLGLES2: |
| InitializeGLExtensionBindingsGL(context); |
| InitializeGLExtensionBindingsEGL(context); |
| break; |
| case kGLImplementationMockGL: |
| InitializeGLExtensionBindingsGL(context); |
| break; |
| default: |
| return false; |
| } |
| |
| return true; |
| } |
| |
| void InitializeDebugGLBindings() { |
| InitializeDebugGLBindingsEGL(); |
| InitializeDebugGLBindingsGL(); |
| InitializeDebugGLBindingsGLX(); |
| InitializeDebugGLBindingsOSMESA(); |
| } |
| |
| void ClearGLBindings() { |
| ClearGLBindingsEGL(); |
| ClearGLBindingsGL(); |
| ClearGLBindingsGLX(); |
| ClearGLBindingsOSMESA(); |
| SetGLImplementation(kGLImplementationNone); |
| |
| UnloadGLNativeLibraries(); |
| } |
| |
| } // namespace gfx |