Move static GL binding initialization to //ui/gl/init.

ui/gl/gl_implementation_win.cc

 // 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 "ui/gl/gl_implementation.h"
 
-#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/lazy_instance.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"
-// TODO(jmadill): Apply to all platforms eventually
-#include "ui/gl/angle_platform_impl.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 gl {
 
-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;
-}
-
-// TODO(jmadill): Apply to all platforms eventually
-base::LazyInstance<ANGLEPlatformImpl> g_angle_platform_impl =
-    LAZY_INSTANCE_INITIALIZER;
-
-ANGLEPlatformShutdownFunc g_angle_platform_shutdown = nullptr;
-
-}  // 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;
-      PathService::Get(base::DIR_MODULE, &module_path);
-      base::NativeLibrary library = base::LoadNativeLibrary(
-          module_path.Append(L"osmesa.dll"), NULL);
-      if (!library) {
-        PathService::Get(base::DIR_EXE, &module_path);
-        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) ==
-          kGLImplementationSwiftShaderName;
-      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) {
-        // Init ANGLE platform here, before we call GetPlatformDisplay().
-        // TODO(jmadill): Apply to all platforms eventually
-        ANGLEPlatformInitializeFunc angle_platform_init =
-            reinterpret_cast<ANGLEPlatformInitializeFunc>(
-                base::GetFunctionPointerFromNativeLibrary(
-                    gles_library,
-                    "ANGLEPlatformInitialize"));
-        if (angle_platform_init) {
-          angle_platform_init(&g_angle_platform_impl.Get());
-
-          g_angle_platform_shutdown =
-              reinterpret_cast<ANGLEPlatformShutdownFunc>(
-                  base::GetFunctionPointerFromNativeLibrary(
-                      gles_library,
-                      "ANGLEPlatformShutdown"));
-        }
-      }
-
-      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.
-      ::gl::g_driver_gl.fn.glClearDepthFn = MarshalClearDepthToClearDepthf;
-      ::gl::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
+      } else {
         InitializeDynamicGLBindingsGL(context);
+      }
       break;
     default:
       return false;
   }
 
   return true;
 }
 
-void InitializeDebugGLBindings() {
-  InitializeDebugGLBindingsEGL();
-  InitializeDebugGLBindingsGL();
-  InitializeDebugGLBindingsOSMESA();
-  InitializeDebugGLBindingsWGL();
-}
-
-void ClearGLBindings() {
-  // TODO(jmadill): Apply to all platforms eventually
-  if (g_angle_platform_shutdown) {
-    g_angle_platform_shutdown();
-  }
-
-  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 gl