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 // Load a library, printing an error message on failure.
  19 base::NativeLibrary LoadLibrary(const base::FilePath& filename) {
  20   base::NativeLibraryLoadError error;
  21   base::NativeLibrary library = base::LoadNativeLibrary(filename, &error);
  22   if (!library) {
  23     DVLOG(1) << "Failed to load " << filename.MaybeAsASCII() << ": "
  24              << error.ToString();
  25     return NULL;
  26   }
  27   return library;
  28 }
  29
  30 base::NativeLibrary LoadLibrary(const char* filename) {
  31   return LoadLibrary(base::FilePath(filename));
  32 }
  33
  34 bool InitializeStaticGLBindingsOSMesaGL() {
  35   base::FilePath module_path;
  36   if (!PathService::Get(base::DIR_MODULE, &module_path)) {
  37     LOG(ERROR) << "PathService::Get failed.";
  38     return false;
  39   }
  40
  41   base::FilePath library_path = module_path.Append("libosmesa.so");
  42   base::NativeLibrary library = LoadLibrary(library_path);
  43   if (!library) {
  44     LOG(ERROR) << "Failed to load " << library_path.value() << ".";
  45     return false;
  46   }
  47
  48   GLGetProcAddressProc get_proc_address =
  49       reinterpret_cast<GLGetProcAddressProc>(
  50           base::GetFunctionPointerFromNativeLibrary(library,
  51                                                     "OSMesaGetProcAddress"));
  52   if (!get_proc_address) {
  53     LOG(ERROR) << "OSMesaGetProcAddress not found.";
  54     base::UnloadNativeLibrary(library);
  55     return false;
  56   }
  57
  58   SetGLGetProcAddressProc(get_proc_address);
  59   AddGLNativeLibrary(library);
  60   SetGLImplementation(kGLImplementationOSMesaGL);
  61
  62   InitializeStaticGLBindingsGL();
  63   InitializeStaticGLBindingsOSMESA();
  64   return true;
  65 }
  66
  67 }  // namespace gfx