ui/gl/gpu_switching_manager.h

   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 #ifndef UI_GL_GPU_SWITCHING_MANAGER_H_
   6 #define UI_GL_GPU_SWITCHING_MANAGER_H_
   7
   8 #include <vector>
   9
  10 #include "base/memory/singleton.h"
  11 #include "base/observer_list.h"
  12 #include "ui/gl/gl_export.h"
  13 #include "ui/gl/gpu_preference.h"
  14 #include "ui/gl/gpu_switching_observer.h"
  15
  16 namespace ui {
  17
  18 class GL_EXPORT GpuSwitchingManager {
  19  public:
  20   // Getter for the singleton. This will return NULL on failure.
  21   static GpuSwitchingManager* GetInstance();
  22
  23   // Set the switching option to PreferIntegratedGpu.
  24   void ForceUseOfIntegratedGpu();
  25   // Set the switching option to PreferDiscreteGpu; switch to discrete GPU
  26   // immediately on Mac where dual GPU switching is supported.
  27   void ForceUseOfDiscreteGpu();
  28
  29   // If no GPU is forced, return the original GpuPreference; otherwise, return
  30   // the forced GPU.
  31   gfx::GpuPreference AdjustGpuPreference(gfx::GpuPreference gpu_preference);
  32
  33   // In the browser process, the value for this flag is computed the first time
  34   // this function is called.
  35   // In the GPU process, the value is passed from the browser process using the
  36   // --supports-dual-gpus commandline switch.
  37   bool SupportsDualGpus();
  38
  39   void SetGpuCount(size_t gpu_count);
  40
  41   void AddObserver(GpuSwitchingObserver* observer);
  42   void RemoveObserver(GpuSwitchingObserver* observer);
  43
  44   // Called when a GPU switch is noticed by the system. In the browser process
  45   // this is occurs as a result of a system observer. In the GPU process, this
  46   // occurs as a result of an IPC from the browser. The system observer is kept
  47   // in the browser process only so that any workarounds or blacklisting can
  48   // be applied there.
  49   void NotifyGpuSwitched();
  50
  51  private:
  52   friend struct DefaultSingletonTraits<GpuSwitchingManager>;
  53
  54   GpuSwitchingManager();
  55   virtual ~GpuSwitchingManager();
  56
  57 #if defined(OS_MACOSX)
  58   void SwitchToDiscreteGpuMac();
  59 #endif  // OS_MACOSX
  60
  61   gfx::GpuPreference gpu_switching_option_;
  62   bool gpu_switching_option_set_;
  63
  64   bool supports_dual_gpus_;
  65   bool supports_dual_gpus_set_;
  66
  67   size_t gpu_count_;
  68
  69   struct PlatformSpecific;
  70   scoped_ptr<PlatformSpecific> platform_specific_;
  71
  72   ObserverList<GpuSwitchingObserver> observer_list_;
  73
  74   DISALLOW_COPY_AND_ASSIGN(GpuSwitchingManager);
  75 };
  76
  77 }  // namespace ui
  78
  79 #endif  // UI_GL_GPU_SWITCHING_MANAGER_H_