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      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
     53