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| 1 // Copyright (c) 2012 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 "chrome/browser/chrome_gpu_util.h" |
| 6 |
| 7 #include "base/command_line.h" |
| 8 #include "base/metrics/field_trial.h" |
| 9 #include "base/metrics/histogram.h" |
| 10 #include "base/version.h" |
| 11 #if defined(OS_WIN) |
| 12 #include "base/win/windows_version.h" |
| 13 #endif |
| 14 #include "chrome/common/chrome_switches.h" |
| 15 #include "chrome/common/chrome_version_info.h" |
| 16 #include "content/public/browser/gpu_data_manager.h" |
| 17 #include "content/public/common/content_constants.h" |
| 18 #include "content/public/common/content_switches.h" |
| 19 #include "grit/browser_resources.h" |
| 20 #include "ui/base/resource/resource_bundle.h" |
| 21 |
| 22 using content::GpuDataManager; |
| 23 |
| 24 namespace gpu_util { |
| 25 |
| 26 void InitializeCompositingFieldTrial() { |
| 27 // Enable the field trial only on desktop OS's. |
| 28 #if !(defined(OS_WIN) || defined(OS_MACOSX) || defined(OS_LINUX)) |
| 29 return; |
| 30 #endif |
| 31 #if defined(OS_WIN) |
| 32 // Don't run the trial on Windows XP. |
| 33 if (base::win::GetVersion() < base::win::VERSION_VISTA) |
| 34 return; |
| 35 #endif |
| 36 |
| 37 // The performance of accelerated compositing is too low with software |
| 38 // rendering. |
| 39 if (content::GpuDataManager::GetInstance()->ShouldUseSoftwareRendering()) |
| 40 return; |
| 41 |
| 42 // Don't activate the field trial if force-compositing-mode has been |
| 43 // explicitly disabled from the command line. |
| 44 if (CommandLine::ForCurrentProcess()->HasSwitch( |
| 45 switches::kDisableForceCompositingMode)) |
| 46 return; |
| 47 |
| 48 const base::FieldTrial::Probability kDivisor = 3; |
| 49 scoped_refptr<base::FieldTrial> trial( |
| 50 base::FieldTrialList::FactoryGetFieldTrial( |
| 51 content::kGpuCompositingFieldTrialName, kDivisor, |
| 52 "disable", 2012, 12, 31, NULL)); |
| 53 |
| 54 // Produce the same result on every run of this client. |
| 55 trial->UseOneTimeRandomization(); |
| 56 |
| 57 base::FieldTrial::Probability force_compositing_mode_probability = 0; |
| 58 base::FieldTrial::Probability threaded_compositing_probability = 0; |
| 59 |
| 60 chrome::VersionInfo::Channel channel = chrome::VersionInfo::GetChannel(); |
| 61 if (channel == chrome::VersionInfo::CHANNEL_STABLE || |
| 62 channel == chrome::VersionInfo::CHANNEL_BETA) { |
| 63 // Stable and Beta channels: Non-threaded force-compositing-mode on by |
| 64 // default (mac and windows only). |
| 65 #if defined(OS_WIN) || defined(OS_MACOSX) |
| 66 force_compositing_mode_probability = 3; |
| 67 #endif |
| 68 } else if (channel == chrome::VersionInfo::CHANNEL_DEV || |
| 69 channel == chrome::VersionInfo::CHANNEL_CANARY) { |
| 70 // Dev and Canary channels: force-compositing-mode and |
| 71 // threaded-compositing on with 1/3 probability each. |
| 72 force_compositing_mode_probability = 1; |
| 73 |
| 74 #if defined(OS_MACOSX) || defined(OS_LINUX) |
| 75 // Threaded compositing mode isn't feature complete on mac or linux yet: |
| 76 // http://crbug.com/133602 for mac |
| 77 // http://crbug.com/140866 for linux |
| 78 threaded_compositing_probability = 0; |
| 79 #else |
| 80 if (!CommandLine::ForCurrentProcess()->HasSwitch( |
| 81 switches::kDisableThreadedCompositing)) |
| 82 threaded_compositing_probability = 1; |
| 83 #endif |
| 84 } |
| 85 |
| 86 int force_compositing_group = trial->AppendGroup( |
| 87 content::kGpuCompositingFieldTrialForceCompositingEnabledName, |
| 88 force_compositing_mode_probability); |
| 89 int thread_group = trial->AppendGroup( |
| 90 content::kGpuCompositingFieldTrialThreadEnabledName, |
| 91 threaded_compositing_probability); |
| 92 |
| 93 bool force_compositing = (trial->group() == force_compositing_group); |
| 94 bool thread = (trial->group() == thread_group); |
| 95 UMA_HISTOGRAM_BOOLEAN("GPU.InForceCompositingModeFieldTrial", |
| 96 force_compositing); |
| 97 UMA_HISTOGRAM_BOOLEAN("GPU.InCompositorThreadFieldTrial", thread); |
| 98 } |
| 99 |
| 100 // Load GPU Blacklist, collect preliminary gpu info, and compute preliminary |
| 101 // gpu feature flags. |
| 102 void InitializeGpuDataManager(const CommandLine& command_line) { |
| 103 if (command_line.HasSwitch(switches::kSkipGpuDataLoading)) |
| 104 return; |
| 105 |
| 106 std::string chrome_version_string = "0"; |
| 107 std::string gpu_blacklist_json_string; |
| 108 if (!command_line.HasSwitch(switches::kIgnoreGpuBlacklist)) { |
| 109 chrome::VersionInfo chrome_version_info; |
| 110 if (chrome_version_info.is_valid()) |
| 111 chrome_version_string = chrome_version_info.Version(); |
| 112 |
| 113 const base::StringPiece gpu_blacklist_json( |
| 114 ResourceBundle::GetSharedInstance().GetRawDataResource( |
| 115 IDR_GPU_BLACKLIST, ui::SCALE_FACTOR_NONE)); |
| 116 gpu_blacklist_json_string = gpu_blacklist_json.as_string(); |
| 117 } |
| 118 content::GpuDataManager::GetInstance()->Initialize( |
| 119 chrome_version_string, gpu_blacklist_json_string); |
| 120 } |
| 121 |
| 122 } // namespace gpu_util; |
| 123 |
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