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 "ui/gl/gl_export.h"
  12 #include "ui/gl/gpu_preference.h"
  13
  14 #if defined(OS_MACOSX)
  15 #include <OpenGL/OpenGL.h>
  16 #endif  // OS_MACOSX
  17
  18 namespace ui {
  19
  20 class GL_EXPORT GpuSwitchingManager {
  21  public:
  22   // Getter for the singleton. This will return NULL on failure.
  23   static GpuSwitchingManager* GetInstance();
  24
  25   // Set the switching option to PreferIntegratedGpu.
  26   void ForceUseOfIntegratedGpu();
  27   // Set the switching option to PreferDiscreteGpu; switch to discrete GPU
  28   // immediately on Mac where dual GPU switching is supported.
  29   void ForceUseOfDiscreteGpu();
  30
  31   // If no GPU is forced, return the original GpuPreference; otherwise, return
  32   // the forced GPU.
  33   gfx::GpuPreference AdjustGpuPreference(gfx::GpuPreference gpu_preference);
  34
  35   // In the browser process, the value for this flag is computed the first time
  36   // this function is called.
  37   // In the GPU process, the value is passed from the browser process using the
  38   // --supports-dual-gpus commandline switch.
  39   bool SupportsDualGpus();
  40
  41   void SetGpuCount(size_t gpu_count);
  42
  43  private:
  44   friend struct DefaultSingletonTraits<GpuSwitchingManager>;
  45
  46   GpuSwitchingManager();
  47   virtual ~GpuSwitchingManager();
  48
  49 #if defined(OS_MACOSX)
  50   void SwitchToDiscreteGpuMac();
  51
  52   CGLPixelFormatObj discrete_pixel_format_;
  53 #endif  // OS_MACOSX
  54
  55   gfx::GpuPreference gpu_switching_option_;
  56   bool gpu_switching_option_set_;
  57
  58   bool supports_dual_gpus_;
  59   bool supports_dual_gpus_set_;
  60
  61   size_t gpu_count_;
  62
  63   DISALLOW_COPY_AND_ASSIGN(GpuSwitchingManager);
  64 };
  65
  66 }  // namespace ui
  67
  68 #endif  // UI_GL_GPU_SWITCHING_MANAGER_H_