content/browser/android/in_process/synchronous_compositor_impl.h

   1 // Copyright 2013 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_ANDROID_IN_PROCESS_SYNCHRONOUS_COMPOSITOR_IMPL_H_
   6 #define CONTENT_BROWSER_ANDROID_IN_PROCESS_SYNCHRONOUS_COMPOSITOR_IMPL_H_
   7
   8 #include <vector>
   9
  10 #include "base/basictypes.h"
  11 #include "base/compiler_specific.h"
  12 #include "base/memory/scoped_ptr.h"
  13 #include "cc/input/layer_scroll_offset_delegate.h"
  14 #include "content/browser/android/in_process/synchronous_compositor_output_surface.h"
  15 #include "content/common/input/input_event_ack_state.h"
  16 #include "content/public/browser/android/synchronous_compositor.h"
  17 #include "content/public/browser/web_contents_user_data.h"
  18 #include "ipc/ipc_message.h"
  19
  20 namespace cc {
  21 class InputHandler;
  22 }
  23
  24 namespace blink {
  25 class WebInputEvent;
  26 }
  27
  28 namespace content {
  29 class InputHandlerManager;
  30 struct DidOverscrollParams;
  31
  32 // The purpose of this class is to act as the intermediary between the various
  33 // components that make up the 'synchronous compositor mode' implementation and
  34 // expose their functionality via the SynchronousCompositor interface.
  35 // This class is created on the main thread but most of the APIs are called
  36 // from the Compositor thread.
  37 class SynchronousCompositorImpl
  38     : public cc::LayerScrollOffsetDelegate,
  39       public SynchronousCompositor,
  40       public SynchronousCompositorOutputSurfaceDelegate,
  41       public WebContentsUserData<SynchronousCompositorImpl> {
  42  public:
  43   // When used from browser code, use both |process_id| and |routing_id|.
  44   static SynchronousCompositorImpl* FromID(int process_id, int routing_id);
  45   // When handling upcalls from renderer code, use this version; the process id
  46   // is implicitly that of the in-process renderer.
  47   static SynchronousCompositorImpl* FromRoutingID(int routing_id);
  48
  49   InputEventAckState HandleInputEvent(const blink::WebInputEvent& input_event);
  50
  51   // SynchronousCompositor
  52   virtual void SetClient(SynchronousCompositorClient* compositor_client)
  53       OVERRIDE;
  54   virtual bool InitializeHwDraw() OVERRIDE;
  55   virtual void ReleaseHwDraw() OVERRIDE;
  56   virtual gpu::GLInProcessContext* GetShareContext() OVERRIDE;
  57   virtual scoped_ptr<cc::CompositorFrame> DemandDrawHw(
  58       gfx::Size surface_size,
  59       const gfx::Transform& transform,
  60       gfx::Rect viewport,
  61       gfx::Rect clip,
  62       gfx::Rect viewport_rect_for_tile_priority,
  63       const gfx::Transform& transform_for_tile_priority) OVERRIDE;
  64   virtual bool DemandDrawSw(SkCanvas* canvas) OVERRIDE;
  65   virtual void ReturnResources(
  66       const cc::CompositorFrameAck& frame_ack) OVERRIDE;
  67   virtual void SetMemoryPolicy(
  68       const SynchronousCompositorMemoryPolicy& policy) OVERRIDE;
  69   virtual void DidChangeRootLayerScrollOffset() OVERRIDE;
  70
  71   // SynchronousCompositorOutputSurfaceDelegate
  72   virtual void DidBindOutputSurface(
  73       SynchronousCompositorOutputSurface* output_surface) OVERRIDE;
  74   virtual void DidDestroySynchronousOutputSurface(
  75       SynchronousCompositorOutputSurface* output_surface) OVERRIDE;
  76   virtual void SetContinuousInvalidate(bool enable) OVERRIDE;
  77   virtual void DidActivatePendingTree() OVERRIDE;
  78
  79   // LayerScrollOffsetDelegate
  80   virtual gfx::Vector2dF GetTotalScrollOffset() OVERRIDE;
  81   virtual void UpdateRootLayerState(const gfx::Vector2dF& total_scroll_offset,
  82                                     const gfx::Vector2dF& max_scroll_offset,
  83                                     const gfx::SizeF& scrollable_size,
  84                                     float page_scale_factor,
  85                                     float min_page_scale_factor,
  86                                     float max_page_scale_factor) OVERRIDE;
  87   virtual bool IsExternalFlingActive() const OVERRIDE;
  88
  89   void SetInputHandler(cc::InputHandler* input_handler);
  90   void DidOverscroll(const DidOverscrollParams& params);
  91   void DidStopFlinging();
  92
  93  private:
  94   explicit SynchronousCompositorImpl(WebContents* contents);
  95   virtual ~SynchronousCompositorImpl();
  96   friend class WebContentsUserData<SynchronousCompositorImpl>;
  97
  98   void UpdateFrameMetaData(const cc::CompositorFrameMetadata& frame_info);
  99   void DeliverMessages();
 100   bool CalledOnValidThread() const;
 101
 102   SynchronousCompositorClient* compositor_client_;
 103   SynchronousCompositorOutputSurface* output_surface_;
 104   WebContents* contents_;
 105   cc::InputHandler* input_handler_;
 106
 107   base::WeakPtrFactory<SynchronousCompositorImpl> weak_ptr_factory_;
 108
 109   DISALLOW_COPY_AND_ASSIGN(SynchronousCompositorImpl);
 110 };
 111
 112 }  // namespace content
 113
 114 #endif  // CONTENT_BROWSER_ANDROID_IN_PROCESS_SYNCHRONOUS_COMPOSITOR_IMPL_H_