src/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 "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/common/input/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 }
  20
  21 namespace blink {
  22 class WebInputEvent;
  23 }
  24
  25 namespace content {
  26 class InputHandlerManager;
  27 struct DidOverscrollParams;
  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 blink::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(
  77       const gfx::Vector2dF& max_scroll_offset) OVERRIDE;
  78   virtual void SetTotalScrollOffset(const gfx::Vector2dF& new_value) OVERRIDE;
  79   virtual gfx::Vector2dF GetTotalScrollOffset() OVERRIDE;
  80   virtual bool IsExternalFlingActive() const OVERRIDE;
  81   virtual void SetTotalPageScaleFactorAndLimits(
  82       float page_scale_factor,
  83       float min_page_scale_factor,
  84       float max_page_scale_factor) OVERRIDE;
  85   virtual void SetScrollableSize(const gfx::SizeF& scrollable_size) OVERRIDE;
  86
  87   void SetInputHandler(cc::InputHandler* input_handler);
  88   void DidOverscroll(const DidOverscrollParams& params);
  89   void DidStopFlinging();
  90
  91  private:
  92   explicit SynchronousCompositorImpl(WebContents* contents);
  93   virtual ~SynchronousCompositorImpl();
  94   friend class WebContentsUserData<SynchronousCompositorImpl>;
  95
  96   void DidCreateSynchronousOutputSurface(
  97       SynchronousCompositorOutputSurface* output_surface);
  98   bool CalledOnValidThread() const;
  99
 100   SynchronousCompositorClient* compositor_client_;
 101   SynchronousCompositorOutputSurface* output_surface_;
 102   WebContents* contents_;
 103   cc::InputHandler* input_handler_;
 104
 105   DISALLOW_COPY_AND_ASSIGN(SynchronousCompositorImpl);
 106 };
 107
 108 }  // namespace content
 109
 110 #endif  // CONTENT_BROWSER_ANDROID_IN_PROCESS_SYNCHRONOUS_COMPOSITOR_IMPL_H_