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