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
12namespace ui {
13
14namespace {
15
16// Returns the name of the platform to use (value of --ozone-platform flag).
17std::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
26int g_selected_platform = -1;
27
28}  // namespace
29
30int 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
48const char* GetOzonePlatformName() {
49  return kPlatformNames[GetOzonePlatformId()];
50}
51
52}  // namespace ui
53