ui/gl/gl_implementation_linux.cc

   1 // Copyright 2013 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_linux.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   std::string error;
  21   base::NativeLibrary library = base::LoadNativeLibrary(filename, &error);
  22   if (!library) {
  23     DVLOG(1) << "Failed to load " << filename.MaybeAsASCII() << ": " << error;
  24     return NULL;
  25   }
  26   return library;
  27 }
  28
  29 base::NativeLibrary LoadLibrary(const char* filename) {
  30   return LoadLibrary(base::FilePath(filename));
  31 }
  32
  33 bool InitializeGLBindingsOSMesaGL() {
  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::NativeLibrary library = LoadLibrary(module_path.Append("libosmesa.so"));
  41   if (!library)
  42     return false;
  43
  44   GLGetProcAddressProc get_proc_address =
  45       reinterpret_cast<GLGetProcAddressProc>(
  46           base::GetFunctionPointerFromNativeLibrary(library,
  47                                                     "OSMesaGetProcAddress"));
  48   if (!get_proc_address) {
  49     LOG(ERROR) << "OSMesaGetProcAddress not found.";
  50     base::UnloadNativeLibrary(library);
  51     return false;
  52   }
  53
  54   SetGLGetProcAddressProc(get_proc_address);
  55   AddGLNativeLibrary(library);
  56   SetGLImplementation(kGLImplementationOSMesaGL);
  57
  58   InitializeGLBindingsGL();
  59   InitializeGLBindingsOSMESA();
  60   return true;
  61 }
  62
  63 }  // namespace gfx