content/browser/compositor/onscreen_display_client.h

   1 // Copyright 2014 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 CONTENT_BROWSER_COMPOSITOR_ONSCREEN_DISPLAY_CLIENT_H_
   6 #define CONTENT_BROWSER_COMPOSITOR_ONSCREEN_DISPLAY_CLIENT_H_
   7
   8 #include "cc/surfaces/display_client.h"
   9
  10 #include "base/memory/ref_counted.h"
  11 #include "base/memory/scoped_ptr.h"
  12 #include "base/single_thread_task_runner.h"
  13 #include "cc/surfaces/display.h"
  14
  15 namespace cc {
  16 class ContextProvider;
  17 class SurfaceManager;
  18 }
  19
  20 namespace content {
  21 class SurfaceDisplayOutputSurface;
  22
  23 // This class provides a DisplayClient implementation for drawing directly to an
  24 // onscreen context.
  25 class OnscreenDisplayClient : cc::DisplayClient {
  26  public:
  27   OnscreenDisplayClient(
  28       scoped_ptr<cc::OutputSurface> output_surface,
  29       cc::SurfaceManager* manager,
  30       scoped_refptr<base::SingleThreadTaskRunner> task_runner);
  31   ~OnscreenDisplayClient() override;
  32
  33   bool Initialize();
  34   cc::Display* display() { return display_.get(); }
  35   void set_surface_output_surface(SurfaceDisplayOutputSurface* surface) {
  36     surface_display_output_surface_ = surface;
  37   }
  38
  39   // cc::DisplayClient implementation.
  40   void DisplayDamaged() override;
  41   void DidSwapBuffers() override;
  42   void DidSwapBuffersComplete() override;
  43   void CommitVSyncParameters(base::TimeTicks timebase,
  44                              base::TimeDelta interval) override;
  45   void OutputSurfaceLost() override;
  46   void SetMemoryPolicy(const cc::ManagedMemoryPolicy& policy) override;
  47
  48  private:
  49   void ScheduleDraw();
  50   void Draw();
  51
  52   scoped_ptr<cc::OutputSurface> output_surface_;
  53   scoped_ptr<cc::Display> display_;
  54   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
  55   SurfaceDisplayOutputSurface* surface_display_output_surface_;
  56   bool scheduled_draw_;
  57   bool output_surface_lost_;
  58   // True if a draw should be scheduled, but it's hit the limit on max frames
  59   // pending.
  60   bool deferred_draw_;
  61   int pending_frames_;
  62
  63   base::WeakPtrFactory<OnscreenDisplayClient> weak_ptr_factory_;
  64
  65   DISALLOW_COPY_AND_ASSIGN(OnscreenDisplayClient);
  66 };
  67
  68 }  // namespace content
  69
  70 #endif  // CONTENT_BROWSER_COMPOSITOR_ONSCREEN_DISPLAY_CLIENT_H_