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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "content/browser/gpu/gpu_feature_checker_impl.h"
#include "base/check.h"
#include "build/build_config.h"
#include "content/browser/gpu/gpu_data_manager_impl.h"
#include "content/public/browser/browser_thread.h"
namespace content {
// static
scoped_refptr<GpuFeatureChecker> GpuFeatureChecker::Create(
gpu::GpuFeatureType feature,
FeatureAvailableCallback callback) {
return new GpuFeatureCheckerImpl(feature, std::move(callback));
}
GpuFeatureCheckerImpl::GpuFeatureCheckerImpl(gpu::GpuFeatureType feature,
FeatureAvailableCallback callback)
: feature_(feature), callback_(std::move(callback)) {}
GpuFeatureCheckerImpl::~GpuFeatureCheckerImpl() {}
void GpuFeatureCheckerImpl::CheckGpuFeatureAvailability() {
CHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
// May only call CheckGpuFeatureAvailability() once.
DCHECK(!checking_);
checking_ = true;
AddRef(); // Matched with a Release in OnGpuInfoUpdate.
GpuDataManagerImpl* manager = GpuDataManagerImpl::GetInstance();
manager->AddObserver(this);
OnGpuInfoUpdate();
}
void GpuFeatureCheckerImpl::OnGpuInfoUpdate() {
GpuDataManagerImpl* manager = GpuDataManagerImpl::GetInstance();
if (manager->IsGpuFeatureInfoAvailable()) {
manager->RemoveObserver(this);
bool feature_allowed =
manager->GetFeatureStatus(feature_) == gpu::kGpuFeatureStatusEnabled;
std::move(callback_).Run(feature_allowed);
Release(); // Matches the AddRef in CheckGpuFeatureAvailability().
}
}
} // namespace content
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