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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/public/browser/compositor_util.h"
#include "base/command_line.h"
#include "base/metrics/field_trial.h"
#include "content/public/browser/gpu_data_manager.h"
#include "content/public/common/content_constants.h"
#include "content/public/common/content_switches.h"
namespace {
using content::GpuDataManager;
bool CanDoAcceleratedCompositing() {
const GpuDataManager* gpu_data_manager = GpuDataManager::GetInstance();
content::GpuFeatureType blacklisted_features =
gpu_data_manager->GetBlacklistedFeatures();
// Don't run the field trial if gpu access has been blocked or
// accelerated compositing is blacklisted.
if (!gpu_data_manager->GpuAccessAllowed() ||
blacklisted_features & content::GPU_FEATURE_TYPE_ACCELERATED_COMPOSITING)
return false;
// Check for the software rasterizer (SwiftShader).
if (gpu_data_manager->ShouldUseSoftwareRendering())
return false;
const CommandLine& command_line = *CommandLine::ForCurrentProcess();
if (command_line.HasSwitch(switches::kDisableAcceleratedCompositing))
return false;
return true;
}
} // namespace
namespace content {
bool IsThreadedCompositingEnabled() {
#if defined(OS_WIN) && defined(USE_AURA)
// We always want compositing on Aura Windows.
return true;
#endif
if (!CanDoAcceleratedCompositing())
return false;
const CommandLine& command_line = *CommandLine::ForCurrentProcess();
// Command line switches take precedence over field trials.
if (command_line.HasSwitch(switches::kDisableForceCompositingMode) ||
command_line.HasSwitch(switches::kDisableThreadedCompositing))
return false;
if (command_line.HasSwitch(switches::kEnableThreadedCompositing))
return true;
base::FieldTrial* trial =
base::FieldTrialList::Find(content::kGpuCompositingFieldTrialName);
return trial &&
trial->group_name() ==
content::kGpuCompositingFieldTrialThreadEnabledName;
}
bool IsForceCompositingModeEnabled() {
#if defined(OS_WIN) && defined(USE_AURA)
// We always want compositing on Aura Windows.
return true;
#endif
if (!CanDoAcceleratedCompositing())
return false;
const CommandLine& command_line = *CommandLine::ForCurrentProcess();
// Command line switches take precedence over field trials.
if (command_line.HasSwitch(switches::kDisableForceCompositingMode))
return false;
if (command_line.HasSwitch(switches::kForceCompositingMode))
return true;
base::FieldTrial* trial =
base::FieldTrialList::Find(content::kGpuCompositingFieldTrialName);
// Force compositing is enabled in both the force compositing
// and threaded compositing mode field trials.
return trial &&
(trial->group_name() ==
content::kGpuCompositingFieldTrialForceCompositingEnabledName ||
trial->group_name() ==
content::kGpuCompositingFieldTrialThreadEnabledName);
}
} // namespace content
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