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 BeginFrameSource;
  22 class InputHandler;
  23 }
  24
  25 namespace blink {
  26 class WebInputEvent;
  27 }
  28
  29 namespace content {
  30 class InputHandlerManager;
  31 class SynchronousCompositorExternalBeginFrameSource;
  32 struct DidOverscrollParams;
  33
  34 // The purpose of this class is to act as the intermediary between the various
  35 // components that make up the 'synchronous compositor mode' implementation and
  36 // expose their functionality via the SynchronousCompositor interface.
  37 // This class is created on the main thread but most of the APIs are called
  38 // from the Compositor thread.
  39 class SynchronousCompositorImpl
  40     : public cc::LayerScrollOffsetDelegate,
  41       public SynchronousCompositor,
  42       public WebContentsUserData<SynchronousCompositorImpl> {
  43  public:
  44   // When used from browser code, use both |process_id| and |routing_id|.
  45   static SynchronousCompositorImpl* FromID(int process_id, int routing_id);
  46   // When handling upcalls from renderer code, use this version; the process id
  47   // is implicitly that of the in-process renderer.
  48   static SynchronousCompositorImpl* FromRoutingID(int routing_id);
  49
  50   InputEventAckState HandleInputEvent(const blink::WebInputEvent& input_event);
  51
  52   // Called by SynchronousCompositorRegistry.
  53   void DidInitializeRendererObjects(
  54       SynchronousCompositorOutputSurface* output_surface,
  55       SynchronousCompositorExternalBeginFrameSource* begin_frame_source);
  56   void DidDestroyRendererObjects();
  57
  58   // Called by SynchronousCompositorExternalBeginFrameSource.
  59   void NeedsBeginFramesChanged() const;
  60
  61   // SynchronousCompositor
  62   virtual bool InitializeHwDraw() override;
  63   virtual void ReleaseHwDraw() override;
  64   virtual scoped_ptr<cc::CompositorFrame> DemandDrawHw(
  65       gfx::Size surface_size,
  66       const gfx::Transform& transform,
  67       gfx::Rect viewport,
  68       gfx::Rect clip,
  69       gfx::Rect viewport_rect_for_tile_priority,
  70       const gfx::Transform& transform_for_tile_priority) override;
  71   virtual bool DemandDrawSw(SkCanvas* canvas) override;
  72   virtual void ReturnResources(
  73       const cc::CompositorFrameAck& frame_ack) override;
  74   virtual void SetMemoryPolicy(size_t bytes_limit) override;
  75   virtual void DidChangeRootLayerScrollOffset() override;
  76
  77   // LayerScrollOffsetDelegate
  78   virtual gfx::ScrollOffset GetTotalScrollOffset() override;
  79   virtual void UpdateRootLayerState(
  80       const gfx::ScrollOffset& total_scroll_offset,
  81       const gfx::ScrollOffset& max_scroll_offset,
  82       const gfx::SizeF& scrollable_size,
  83       float page_scale_factor,
  84       float min_page_scale_factor,
  85       float max_page_scale_factor) override;
  86   virtual bool IsExternalFlingActive() const override;
  87
  88   void SetInputHandler(cc::InputHandler* input_handler);
  89   void DidOverscroll(const DidOverscrollParams& params);
  90   void DidStopFlinging();
  91
  92  private:
  93   friend class WebContentsUserData<SynchronousCompositorImpl>;
  94   friend class SynchronousCompositor;
  95   explicit SynchronousCompositorImpl(WebContents* contents);
  96   virtual ~SynchronousCompositorImpl();
  97
  98   void SetClient(SynchronousCompositorClient* compositor_client);
  99   void UpdateFrameMetaData(const cc::CompositorFrameMetadata& frame_info);
 100   void NotifyDidDestroyCompositorToClient();
 101   void DidActivatePendingTree();
 102   void DeliverMessages();
 103   bool CalledOnValidThread() const;
 104
 105   SynchronousCompositorClient* compositor_client_;
 106   SynchronousCompositorOutputSurface* output_surface_;
 107   SynchronousCompositorExternalBeginFrameSource* begin_frame_source_;
 108   WebContents* contents_;
 109   const int routing_id_;
 110   cc::InputHandler* input_handler_;
 111   bool invoking_composite_;
 112
 113   base::WeakPtrFactory<SynchronousCompositorImpl> weak_ptr_factory_;
 114
 115   DISALLOW_COPY_AND_ASSIGN(SynchronousCompositorImpl);
 116 };
 117
 118 }  // namespace content
 119
 120 #endif  // CONTENT_BROWSER_ANDROID_IN_PROCESS_SYNCHRONOUS_COMPOSITOR_IMPL_H_