src/ui/gl/gl_implementation_win.cc

   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.
   4
   5 #include <vector>
   6
   7 #include "base/at_exit.h"
   8 #include "base/base_paths.h"
   9 #include "base/bind.h"
  10 #include "base/command_line.h"
  11 #include "base/debug/trace_event.h"
  12 #include "base/files/file_path.h"
  13 #include "base/logging.h"
  14 #include "base/native_library.h"
  15 #include "base/path_service.h"
  16 #include "base/strings/stringprintf.h"
  17 #include "base/threading/thread_restrictions.h"
  18 #include "base/win/windows_version.h"
  19 #include "ui/gl/gl_bindings.h"
  20 #include "ui/gl/gl_context_stub_with_extensions.h"
  21 #include "ui/gl/gl_egl_api_implementation.h"
  22 #include "ui/gl/gl_gl_api_implementation.h"
  23 #include "ui/gl/gl_implementation.h"
  24 #include "ui/gl/gl_osmesa_api_implementation.h"
  25 #include "ui/gl/gl_surface_wgl.h"
  26 #include "ui/gl/gl_wgl_api_implementation.h"
  27
  28 #if defined(ENABLE_SWIFTSHADER)
  29 #include "software_renderer.h"
  30 #endif
  31
  32 namespace gfx {
  33
  34 namespace {
  35
  36 const wchar_t kD3DCompiler[] = L"D3DCompiler_46.dll";
  37
  38 void GL_BINDING_CALL MarshalClearDepthToClearDepthf(GLclampd depth) {
  39   glClearDepthf(static_cast<GLclampf>(depth));
  40 }
  41
  42 void GL_BINDING_CALL MarshalDepthRangeToDepthRangef(GLclampd z_near,
  43                                                     GLclampd z_far) {
  44   glDepthRangef(static_cast<GLclampf>(z_near), static_cast<GLclampf>(z_far));
  45 }
  46
  47 bool LoadD3DXLibrary(const base::FilePath& module_path,
  48                      const base::FilePath::StringType& name) {
  49   base::NativeLibrary library =
  50       base::LoadNativeLibrary(base::FilePath(name), NULL);
  51   if (!library) {
  52     library = base::LoadNativeLibrary(module_path.Append(name), NULL);
  53     if (!library) {
  54       DVLOG(1) << name << " not found.";
  55       return false;
  56     }
  57   }
  58   return true;
  59 }
  60
  61 const unsigned char* AngleGetTraceCategoryEnabledFlag(const char* name) {
  62   return TRACE_EVENT_API_GET_CATEGORY_GROUP_ENABLED(name);
  63 }
  64
  65 void AngleAddTraceEvent(char phase,
  66                         const unsigned char* category_group_enabled,
  67                         const char* name,
  68                         unsigned long long id,
  69                         int num_args,
  70                         const char** arg_names,
  71                         const unsigned char* arg_types,
  72                         const unsigned long long* arg_values,
  73                         unsigned char flags) {
  74   TRACE_EVENT_API_ADD_TRACE_EVENT(phase,
  75                                   category_group_enabled,
  76                                   name,
  77                                   id,
  78                                   num_args,
  79                                   arg_names,
  80                                   arg_types,
  81                                   arg_values,
  82                                   NULL,
  83                                   flags);
  84 }
  85
  86 typedef const unsigned char* (*GetCategoryEnabledFlagFunc)(const char* name);
  87 typedef void (*AddTraceEventFunc)(char phase,
  88                                   const unsigned char* categoryGroupEnabled,
  89                                   const char* name,
  90                                   unsigned long long id,
  91                                   int numArgs,
  92                                   const char** argNames,
  93                                   const unsigned char* argTypes,
  94                                   const unsigned long long* argValues,
  95                                   unsigned char flags);
  96 typedef void (__stdcall *SetTraceFunctionPointersFunc)(
  97     GetCategoryEnabledFlagFunc get_category_enabled_flag,
  98     AddTraceEventFunc add_trace_event_func);
  99
 100 }  // namespace
 101
 102 void GetAllowedGLImplementations(std::vector<GLImplementation>* impls) {
 103   impls->push_back(kGLImplementationEGLGLES2);
 104   impls->push_back(kGLImplementationDesktopGL);
 105   impls->push_back(kGLImplementationOSMesaGL);
 106 }
 107
 108 bool InitializeStaticGLBindings(GLImplementation implementation) {
 109   // Prevent reinitialization with a different implementation. Once the gpu
 110   // unit tests have initialized with kGLImplementationMock, we don't want to
 111   // later switch to another GL implementation.
 112   DCHECK_EQ(kGLImplementationNone, GetGLImplementation());
 113
 114   // Allow the main thread or another to initialize these bindings
 115   // after instituting restrictions on I/O. Going forward they will
 116   // likely be used in the browser process on most platforms. The
 117   // one-time initialization cost is small, between 2 and 5 ms.
 118   base::ThreadRestrictions::ScopedAllowIO allow_io;
 119
 120   switch (implementation) {
 121     case kGLImplementationOSMesaGL: {
 122       base::FilePath module_path;
 123       if (!PathService::Get(base::DIR_MODULE, &module_path)) {
 124         LOG(ERROR) << "PathService::Get failed.";
 125         return false;
 126       }
 127
 128       base::NativeLibrary library = base::LoadNativeLibrary(
 129           module_path.Append(L"osmesa.dll"), NULL);
 130       if (!library) {
 131         DVLOG(1) << "osmesa.dll not found";
 132         return false;
 133       }
 134
 135       GLGetProcAddressProc get_proc_address =
 136           reinterpret_cast<GLGetProcAddressProc>(
 137               base::GetFunctionPointerFromNativeLibrary(
 138                   library, "OSMesaGetProcAddress"));
 139       if (!get_proc_address) {
 140         DLOG(ERROR) << "OSMesaGetProcAddress not found.";
 141         base::UnloadNativeLibrary(library);
 142         return false;
 143       }
 144
 145       SetGLGetProcAddressProc(get_proc_address);
 146       AddGLNativeLibrary(library);
 147       SetGLImplementation(kGLImplementationOSMesaGL);
 148
 149       InitializeStaticGLBindingsGL();
 150       InitializeStaticGLBindingsOSMESA();
 151       break;
 152     }
 153     case kGLImplementationEGLGLES2: {
 154       base::FilePath module_path;
 155       if (!PathService::Get(base::DIR_MODULE, &module_path))
 156         return false;
 157
 158       // Attempt to load the D3DX shader compiler using the default search path
 159       // and if that fails, using an absolute path. This is to ensure these DLLs
 160       // are loaded before ANGLE is loaded in case they are not in the default
 161       // search path.
 162       LoadD3DXLibrary(module_path, kD3DCompiler);
 163
 164       base::FilePath gles_path;
 165       const CommandLine* command_line = CommandLine::ForCurrentProcess();
 166       bool using_swift_shader =
 167           command_line->GetSwitchValueASCII(switches::kUseGL) == "swiftshader";
 168       if (using_swift_shader) {
 169         if (!command_line->HasSwitch(switches::kSwiftShaderPath))
 170           return false;
 171         gles_path =
 172             command_line->GetSwitchValuePath(switches::kSwiftShaderPath);
 173         // Preload library
 174         LoadLibrary(L"ddraw.dll");
 175       } else {
 176         gles_path = module_path;
 177       }
 178
 179       // Load libglesv2.dll before libegl.dll because the latter is dependent on
 180       // the former and if there is another version of libglesv2.dll in the dll
 181       // search path, it will get loaded instead.
 182       base::NativeLibrary gles_library = base::LoadNativeLibrary(
 183           gles_path.Append(L"libglesv2.dll"), NULL);
 184       if (!gles_library) {
 185         DVLOG(1) << "libglesv2.dll not found";
 186         return false;
 187       }
 188
 189       // When using EGL, first try eglGetProcAddress and then Windows
 190       // GetProcAddress on both the EGL and GLES2 DLLs.
 191       base::NativeLibrary egl_library = base::LoadNativeLibrary(
 192           gles_path.Append(L"libegl.dll"), NULL);
 193       if (!egl_library) {
 194         DVLOG(1) << "libegl.dll not found.";
 195         base::UnloadNativeLibrary(gles_library);
 196         return false;
 197       }
 198
 199 #if defined(ENABLE_SWIFTSHADER)
 200       if (using_swift_shader) {
 201         SetupSoftwareRenderer(gles_library);
 202       }
 203 #endif
 204
 205       if (!using_swift_shader) {
 206         SetTraceFunctionPointersFunc set_trace_function_pointers =
 207             reinterpret_cast<SetTraceFunctionPointersFunc>(
 208                 base::GetFunctionPointerFromNativeLibrary(
 209                     gles_library, "SetTraceFunctionPointers"));
 210         if (set_trace_function_pointers) {
 211           set_trace_function_pointers(&AngleGetTraceCategoryEnabledFlag,
 212                                       &AngleAddTraceEvent);
 213         }
 214       }
 215
 216       GLGetProcAddressProc get_proc_address =
 217           reinterpret_cast<GLGetProcAddressProc>(
 218               base::GetFunctionPointerFromNativeLibrary(
 219                   egl_library, "eglGetProcAddress"));
 220       if (!get_proc_address) {
 221         LOG(ERROR) << "eglGetProcAddress not found.";
 222         base::UnloadNativeLibrary(egl_library);
 223         base::UnloadNativeLibrary(gles_library);
 224         return false;
 225       }
 226
 227       SetGLGetProcAddressProc(get_proc_address);
 228       AddGLNativeLibrary(egl_library);
 229       AddGLNativeLibrary(gles_library);
 230       SetGLImplementation(kGLImplementationEGLGLES2);
 231
 232       InitializeStaticGLBindingsGL();
 233       InitializeStaticGLBindingsEGL();
 234
 235       // These two functions take single precision float rather than double
 236       // precision float parameters in GLES.
 237       ::gfx::g_driver_gl.fn.glClearDepthFn = MarshalClearDepthToClearDepthf;
 238       ::gfx::g_driver_gl.fn.glDepthRangeFn = MarshalDepthRangeToDepthRangef;
 239       break;
 240     }
 241     case kGLImplementationDesktopGL: {
 242       base::NativeLibrary library = base::LoadNativeLibrary(
 243           base::FilePath(L"opengl32.dll"), NULL);
 244       if (!library) {
 245         DVLOG(1) << "opengl32.dll not found";
 246         return false;
 247       }
 248
 249       GLGetProcAddressProc get_proc_address =
 250           reinterpret_cast<GLGetProcAddressProc>(
 251               base::GetFunctionPointerFromNativeLibrary(
 252                   library, "wglGetProcAddress"));
 253       if (!get_proc_address) {
 254         LOG(ERROR) << "wglGetProcAddress not found.";
 255         base::UnloadNativeLibrary(library);
 256         return false;
 257       }
 258
 259       SetGLGetProcAddressProc(get_proc_address);
 260       AddGLNativeLibrary(library);
 261       SetGLImplementation(kGLImplementationDesktopGL);
 262
 263       // Initialize GL surface and get some functions needed for the context
 264       // creation below.
 265       if (!GLSurfaceWGL::InitializeOneOff()) {
 266         LOG(ERROR) << "GLSurfaceWGL::InitializeOneOff failed.";
 267         return false;
 268       }
 269       wglCreateContextProc wglCreateContextFn =
 270           reinterpret_cast<wglCreateContextProc>(
 271               GetGLProcAddress("wglCreateContext"));
 272       wglDeleteContextProc wglDeleteContextFn =
 273           reinterpret_cast<wglDeleteContextProc>(
 274               GetGLProcAddress("wglDeleteContext"));
 275       wglMakeCurrentProc wglMakeCurrentFn =
 276           reinterpret_cast<wglMakeCurrentProc>(
 277               GetGLProcAddress("wglMakeCurrent"));
 278
 279       // Create a temporary GL context to bind to entry points. This is needed
 280       // because wglGetProcAddress is specified to return NULL for all queries
 281       // if a context is not current in MSDN documentation, and the static
 282       // bindings may contain functions that need to be queried with
 283       // wglGetProcAddress. OpenGL wiki further warns that other error values
 284       // than NULL could also be returned from wglGetProcAddress on some
 285       // implementations, so we need to clear the WGL bindings and reinitialize
 286       // them after the context creation.
 287       HGLRC gl_context = wglCreateContextFn(GLSurfaceWGL::GetDisplayDC());
 288       if (!gl_context) {
 289         LOG(ERROR) << "Failed to create temporary context.";
 290         return false;
 291       }
 292       if (!wglMakeCurrentFn(GLSurfaceWGL::GetDisplayDC(), gl_context)) {
 293         LOG(ERROR) << "Failed to make temporary GL context current.";
 294         wglDeleteContextFn(gl_context);
 295         return false;
 296       }
 297
 298       InitializeStaticGLBindingsGL();
 299       InitializeStaticGLBindingsWGL();
 300
 301       wglMakeCurrent(NULL, NULL);
 302       wglDeleteContext(gl_context);
 303
 304       break;
 305     }
 306     case kGLImplementationMockGL: {
 307       SetGLImplementation(kGLImplementationMockGL);
 308       InitializeStaticGLBindingsGL();
 309       break;
 310     }
 311     default:
 312       return false;
 313   }
 314
 315   return true;
 316 }
 317
 318 bool InitializeDynamicGLBindings(GLImplementation implementation,
 319     GLContext* context) {
 320   switch (implementation) {
 321     case kGLImplementationOSMesaGL:
 322       InitializeDynamicGLBindingsGL(context);
 323       InitializeDynamicGLBindingsOSMESA(context);
 324       break;
 325     case kGLImplementationEGLGLES2:
 326       InitializeDynamicGLBindingsGL(context);
 327       InitializeDynamicGLBindingsEGL(context);
 328       break;
 329     case kGLImplementationDesktopGL:
 330       InitializeDynamicGLBindingsGL(context);
 331       InitializeDynamicGLBindingsWGL(context);
 332       break;
 333     case kGLImplementationMockGL:
 334       if (!context) {
 335         scoped_refptr<GLContextStubWithExtensions> mock_context(
 336             new GLContextStubWithExtensions());
 337         mock_context->SetGLVersionString("3.0");
 338         InitializeDynamicGLBindingsGL(mock_context.get());
 339       } else
 340         InitializeDynamicGLBindingsGL(context);
 341       break;
 342     default:
 343       return false;
 344   }
 345
 346   return true;
 347 }
 348
 349 void InitializeDebugGLBindings() {
 350   InitializeDebugGLBindingsEGL();
 351   InitializeDebugGLBindingsGL();
 352   InitializeDebugGLBindingsOSMESA();
 353   InitializeDebugGLBindingsWGL();
 354 }
 355
 356 void ClearGLBindings() {
 357   ClearGLBindingsEGL();
 358   ClearGLBindingsGL();
 359   ClearGLBindingsOSMESA();
 360   ClearGLBindingsWGL();
 361   SetGLImplementation(kGLImplementationNone);
 362   UnloadGLNativeLibraries();
 363 }
 364
 365 bool GetGLWindowSystemBindingInfo(GLWindowSystemBindingInfo* info) {
 366   switch (GetGLImplementation()) {
 367     case kGLImplementationDesktopGL:
 368       return GetGLWindowSystemBindingInfoWGL(info);
 369     case kGLImplementationEGLGLES2:
 370       return GetGLWindowSystemBindingInfoEGL(info);
 371     default:
 372       return false;
 373   }
 374 }
 375
 376 }  // namespace gfx