| // 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/files/file_path.h" |
| #include "base/logging.h" |
| #include "base/native_library.h" |
| #include "base/path_service.h" |
| #include "base/strings/stringprintf.h" |
| #include "base/threading/thread_restrictions.h" |
| #include "base/trace_event/trace_event.h" |
| #include "base/win/windows_version.h" |
| #include "ui/gl/gl_bindings.h" |
| #include "ui/gl/gl_context_stub_with_extensions.h" |
| #include "ui/gl/gl_egl_api_implementation.h" |
| #include "ui/gl/gl_gl_api_implementation.h" |
| #include "ui/gl/gl_implementation.h" |
| #include "ui/gl/gl_osmesa_api_implementation.h" |
| #include "ui/gl/gl_surface_wgl.h" |
| #include "ui/gl/gl_wgl_api_implementation.h" |
| |
| #if defined(ENABLE_SWIFTSHADER) |
| #include "software_renderer.h" |
| #endif |
| |
| namespace gfx { |
| |
| namespace { |
| |
| const wchar_t kD3DCompiler[] = L"D3DCompiler_47.dll"; |
| |
| 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 base::FilePath& module_path, |
| const base::FilePath::StringType& name) { |
| base::NativeLibrary library = |
| base::LoadNativeLibrary(base::FilePath(name), NULL); |
| if (!library) { |
| library = base::LoadNativeLibrary(module_path.Append(name), NULL); |
| if (!library) { |
| DVLOG(1) << name << " not found."; |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| const unsigned char* AngleGetTraceCategoryEnabledFlag(const char* name) { |
| return TRACE_EVENT_API_GET_CATEGORY_GROUP_ENABLED(name); |
| } |
| |
| void AngleAddTraceEvent(char phase, |
| const unsigned char* category_group_enabled, |
| const char* name, |
| unsigned long long id, |
| int num_args, |
| const char** arg_names, |
| const unsigned char* arg_types, |
| const unsigned long long* arg_values, |
| unsigned char flags) { |
| TRACE_EVENT_API_ADD_TRACE_EVENT(phase, |
| category_group_enabled, |
| name, |
| id, |
| num_args, |
| arg_names, |
| arg_types, |
| arg_values, |
| NULL, |
| flags); |
| } |
| |
| typedef const unsigned char* (*GetCategoryEnabledFlagFunc)(const char* name); |
| typedef void (*AddTraceEventFunc)(char phase, |
| const unsigned char* categoryGroupEnabled, |
| const char* name, |
| unsigned long long id, |
| int numArgs, |
| const char** argNames, |
| const unsigned char* argTypes, |
| const unsigned long long* argValues, |
| unsigned char flags); |
| typedef void (__stdcall *SetTraceFunctionPointersFunc)( |
| GetCategoryEnabledFlagFunc get_category_enabled_flag, |
| AddTraceEventFunc add_trace_event_func); |
| |
| } // namespace |
| |
| void GetAllowedGLImplementations(std::vector<GLImplementation>* impls) { |
| impls->push_back(kGLImplementationEGLGLES2); |
| impls->push_back(kGLImplementationDesktopGL); |
| impls->push_back(kGLImplementationOSMesaGL); |
| } |
| |
| bool InitializeStaticGLBindings(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. |
| DCHECK_EQ(kGLImplementationNone, GetGLImplementation()); |
| |
| // 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: { |
| base::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); |
| |
| InitializeStaticGLBindingsGL(); |
| InitializeStaticGLBindingsOSMESA(); |
| break; |
| } |
| case kGLImplementationEGLGLES2: { |
| base::FilePath module_path; |
| if (!PathService::Get(base::DIR_MODULE, &module_path)) |
| return false; |
| |
| // Attempt to load the D3DX shader compiler 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, kD3DCompiler); |
| |
| base::FilePath gles_path; |
| const base::CommandLine* command_line = |
| base::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 |
| |
| if (!using_swift_shader) { |
| SetTraceFunctionPointersFunc set_trace_function_pointers = |
| reinterpret_cast<SetTraceFunctionPointersFunc>( |
| base::GetFunctionPointerFromNativeLibrary( |
| gles_library, "SetTraceFunctionPointers")); |
| if (set_trace_function_pointers) { |
| set_trace_function_pointers(&AngleGetTraceCategoryEnabledFlag, |
| &AngleAddTraceEvent); |
| } |
| } |
| |
| 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); |
| |
| InitializeStaticGLBindingsGL(); |
| InitializeStaticGLBindingsEGL(); |
| |
| // These two functions take single precision float rather than double |
| // precision float parameters in GLES. |
| ::gfx::g_driver_gl.fn.glClearDepthFn = MarshalClearDepthToClearDepthf; |
| ::gfx::g_driver_gl.fn.glDepthRangeFn = MarshalDepthRangeToDepthRangef; |
| break; |
| } |
| case kGLImplementationDesktopGL: { |
| base::NativeLibrary library = base::LoadNativeLibrary( |
| base::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); |
| |
| // Initialize GL surface and get some functions needed for the context |
| // creation below. |
| if (!GLSurfaceWGL::InitializeOneOff()) { |
| LOG(ERROR) << "GLSurfaceWGL::InitializeOneOff failed."; |
| return false; |
| } |
| wglCreateContextProc wglCreateContextFn = |
| reinterpret_cast<wglCreateContextProc>( |
| GetGLProcAddress("wglCreateContext")); |
| wglDeleteContextProc wglDeleteContextFn = |
| reinterpret_cast<wglDeleteContextProc>( |
| GetGLProcAddress("wglDeleteContext")); |
| wglMakeCurrentProc wglMakeCurrentFn = |
| reinterpret_cast<wglMakeCurrentProc>( |
| GetGLProcAddress("wglMakeCurrent")); |
| |
| // Create a temporary GL context to bind to entry points. This is needed |
| // because wglGetProcAddress is specified to return NULL for all queries |
| // if a context is not current in MSDN documentation, and the static |
| // bindings may contain functions that need to be queried with |
| // wglGetProcAddress. OpenGL wiki further warns that other error values |
| // than NULL could also be returned from wglGetProcAddress on some |
| // implementations, so we need to clear the WGL bindings and reinitialize |
| // them after the context creation. |
| HGLRC gl_context = wglCreateContextFn(GLSurfaceWGL::GetDisplayDC()); |
| if (!gl_context) { |
| LOG(ERROR) << "Failed to create temporary context."; |
| return false; |
| } |
| if (!wglMakeCurrentFn(GLSurfaceWGL::GetDisplayDC(), gl_context)) { |
| LOG(ERROR) << "Failed to make temporary GL context current."; |
| wglDeleteContextFn(gl_context); |
| return false; |
| } |
| |
| InitializeStaticGLBindingsGL(); |
| InitializeStaticGLBindingsWGL(); |
| |
| wglMakeCurrent(NULL, NULL); |
| wglDeleteContext(gl_context); |
| |
| break; |
| } |
| case kGLImplementationMockGL: { |
| SetGLImplementation(kGLImplementationMockGL); |
| InitializeStaticGLBindingsGL(); |
| break; |
| } |
| default: |
| return false; |
| } |
| |
| return true; |
| } |
| |
| bool InitializeDynamicGLBindings(GLImplementation implementation, |
| GLContext* context) { |
| switch (implementation) { |
| case kGLImplementationOSMesaGL: |
| case kGLImplementationEGLGLES2: |
| case kGLImplementationDesktopGL: |
| InitializeDynamicGLBindingsGL(context); |
| break; |
| case kGLImplementationMockGL: |
| if (!context) { |
| scoped_refptr<GLContextStubWithExtensions> mock_context( |
| new GLContextStubWithExtensions()); |
| mock_context->SetGLVersionString("3.0"); |
| InitializeDynamicGLBindingsGL(mock_context.get()); |
| } else |
| InitializeDynamicGLBindingsGL(context); |
| break; |
| default: |
| return false; |
| } |
| |
| return true; |
| } |
| |
| void InitializeDebugGLBindings() { |
| InitializeDebugGLBindingsEGL(); |
| InitializeDebugGLBindingsGL(); |
| InitializeDebugGLBindingsOSMESA(); |
| InitializeDebugGLBindingsWGL(); |
| } |
| |
| void ClearGLBindings() { |
| ClearGLBindingsEGL(); |
| ClearGLBindingsGL(); |
| ClearGLBindingsOSMESA(); |
| ClearGLBindingsWGL(); |
| SetGLImplementation(kGLImplementationNone); |
| UnloadGLNativeLibraries(); |
| } |
| |
| bool GetGLWindowSystemBindingInfo(GLWindowSystemBindingInfo* info) { |
| switch (GetGLImplementation()) { |
| case kGLImplementationDesktopGL: |
| return GetGLWindowSystemBindingInfoWGL(info); |
| case kGLImplementationEGLGLES2: |
| return GetGLWindowSystemBindingInfoEGL(info); |
| default: |
| return false; |
| } |
| } |
| |
| } // namespace gfx |
