ui/ozone/platform_selection.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/ozone/platform_selection.h"
   6
   7 #include "base/command_line.h"
   8 #include "base/logging.h"
   9 #include "ui/ozone/platform_list.h"
  10 #include "ui/ozone/public/ozone_switches.h"
  11
  12 namespace ui {
  13
  14 namespace {
  15
  16 // Returns the name of the platform to use (value of --ozone-platform flag).
  17 std::string GetPlatformName() {
  18   // The first platform is the default.
  19   if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
  20           switches::kOzonePlatform) &&
  21       kPlatformCount > 0)
  22     return kPlatformNames[0];
  23   return base::CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
  24       switches::kOzonePlatform);
  25 }
  26
  27 int g_selected_platform = -1;
  28
  29 }  // namespace
  30
  31 int GetOzonePlatformId() {
  32   if (g_selected_platform >= 0)
  33     return g_selected_platform;
  34
  35   std::string platform_name = GetPlatformName();
  36
  37   // Search for a matching platform in the list.
  38   for (int platform_id = 0; platform_id < kPlatformCount; ++platform_id) {
  39     if (platform_name == kPlatformNames[platform_id]) {
  40       g_selected_platform = platform_id;
  41       return g_selected_platform;
  42     }
  43   }
  44
  45   LOG(FATAL) << "Invalid ozone platform: " << platform_name;
  46   return -1;  // not reached
  47 }
  48
  49 const char* GetOzonePlatformName() {
  50   return kPlatformNames[GetOzonePlatformId()];
  51 }
  52
  53 }  // namespace ui