src/ui/gl/gl_implementation_osmesa.cc

   1 // Copyright 2014 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 "ui/gl/gl_implementation_osmesa.h"
   6
   7 #include "base/files/file_path.h"
   8 #include "base/logging.h"
   9 #include "base/native_library.h"
  10 #include "base/path_service.h"
  11 #include "ui/gl/gl_bindings.h"
  12 #include "ui/gl/gl_gl_api_implementation.h"
  13 #include "ui/gl/gl_implementation.h"
  14 #include "ui/gl/gl_osmesa_api_implementation.h"
  15
  16 namespace gfx {
  17
  18 base::NativeLibrary LoadLibraryAndPrintError(const base::FilePath& filename) {
  19   base::NativeLibraryLoadError error;
  20   base::NativeLibrary library = base::LoadNativeLibrary(filename, &error);
  21   if (!library) {
  22     LOG(ERROR) << "Failed to load " << filename.MaybeAsASCII() << ": "
  23                << error.ToString();
  24     return NULL;
  25   }
  26   return library;
  27 }
  28
  29 base::NativeLibrary LoadLibraryAndPrintError(const char* filename) {
  30   return LoadLibraryAndPrintError(base::FilePath(filename));
  31 }
  32
  33 bool InitializeStaticGLBindingsOSMesaGL() {
  34   base::FilePath module_path;
  35   if (!PathService::Get(base::DIR_MODULE, &module_path)) {
  36     LOG(ERROR) << "PathService::Get failed.";
  37     return false;
  38   }
  39
  40   base::FilePath library_path = module_path.Append("libosmesa.so");
  41   base::NativeLibrary library = LoadLibraryAndPrintError(library_path);
  42   if (!library)
  43     return false;
  44
  45   GLGetProcAddressProc get_proc_address =
  46       reinterpret_cast<GLGetProcAddressProc>(
  47           base::GetFunctionPointerFromNativeLibrary(library,
  48                                                     "OSMesaGetProcAddress"));
  49   if (!get_proc_address) {
  50     LOG(ERROR) << "OSMesaGetProcAddress not found.";
  51     base::UnloadNativeLibrary(library);
  52     return false;
  53   }
  54
  55   SetGLGetProcAddressProc(get_proc_address);
  56   AddGLNativeLibrary(library);
  57   SetGLImplementation(kGLImplementationOSMesaGL);
  58
  59   InitializeStaticGLBindingsGL();
  60   InitializeStaticGLBindingsOSMESA();
  61   return true;
  62 }
  63
  64 }  // namespace gfx