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/ozone_switches.h"
  10 #include "ui/ozone/platform_list.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 (!CommandLine::ForCurrentProcess()->HasSwitch(switches::kOzonePlatform) &&
  20       kPlatformCount > 0)
  21     return kPlatformNames[0];
  22   return CommandLine::ForCurrentProcess()->GetSwitchValueASCII(
  23       switches::kOzonePlatform);
  24 }
  25
  26 int g_selected_platform = -1;
  27
  28 }  // namespace
  29
  30 int GetOzonePlatformId() {
  31   if (g_selected_platform >= 0)
  32     return g_selected_platform;
  33
  34   std::string platform_name = GetPlatformName();
  35
  36   // Search for a matching platform in the list.
  37   for (int platform_id = 0; platform_id < kPlatformCount; ++platform_id) {
  38     if (platform_name == kPlatformNames[platform_id]) {
  39       g_selected_platform = platform_id;
  40       return g_selected_platform;
  41     }
  42   }
  43
  44   LOG(FATAL) << "Invalid ozone platform: " << platform_name;
  45   return -1;  // not reached
  46 }
  47
  48 const char* GetOzonePlatformName() {
  49   return kPlatformNames[GetOzonePlatformId()];
  50 }
  51
  52 }  // namespace ui