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75 lines
2.3 KiB
C++
75 lines
2.3 KiB
C++
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef UI_GL_GPU_SWITCHING_MANAGER_H_
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#define UI_GL_GPU_SWITCHING_MANAGER_H_
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#include <vector>
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#include "base/memory/singleton.h"
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#include "base/observer_list.h"
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#include "ui/gl/gl_export.h"
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#include "ui/gl/gpu_preference.h"
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#include "ui/gl/gpu_switching_observer.h"
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namespace ui {
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class GL_EXPORT GpuSwitchingManager {
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public:
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// Getter for the singleton. This will return NULL on failure.
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static GpuSwitchingManager* GetInstance();
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// Set the switching option to PreferIntegratedGpu.
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void ForceUseOfIntegratedGpu();
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// Set the switching option to PreferDiscreteGpu; switch to discrete GPU
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// immediately on Mac where dual GPU switching is supported.
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void ForceUseOfDiscreteGpu();
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// If no GPU is forced, return the original GpuPreference; otherwise, return
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// the forced GPU.
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gfx::GpuPreference AdjustGpuPreference(gfx::GpuPreference gpu_preference);
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// In the browser process, the value for this flag is computed the first time
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// this function is called.
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// In the GPU process, the value is passed from the browser process using the
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// --supports-dual-gpus commandline switch.
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bool SupportsDualGpus();
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void SetGpuCount(size_t gpu_count);
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void AddObserver(GpuSwitchingObserver* observer);
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void RemoveObserver(GpuSwitchingObserver* observer);
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// Called when a GPU switch is noticed by the system. In the browser process
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// this is occurs as a result of a system observer. In the GPU process, this
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// occurs as a result of an IPC from the browser. The system observer is kept
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// in the browser process only so that any workarounds or blacklisting can
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// be applied there.
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void NotifyGpuSwitched();
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private:
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friend struct DefaultSingletonTraits<GpuSwitchingManager>;
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GpuSwitchingManager();
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virtual ~GpuSwitchingManager();
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gfx::GpuPreference gpu_switching_option_;
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bool gpu_switching_option_set_;
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bool supports_dual_gpus_;
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bool supports_dual_gpus_set_;
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size_t gpu_count_;
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struct PlatformSpecific;
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base::ObserverList<GpuSwitchingObserver> observer_list_;
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DISALLOW_COPY_AND_ASSIGN(GpuSwitchingManager);
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};
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} // namespace ui
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#endif // UI_GL_GPU_SWITCHING_MANAGER_H_
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