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 "content/renderer/input/synchronous_input_handler_proxy.h"
  19 #include "ipc/ipc_message.h"
  20
  21 namespace cc {
  22 struct BeginFrameArgs;
  23 class InputHandler;
  24 }
  25
  26 namespace blink {
  27 class WebInputEvent;
  28 }
  29
  30 namespace content {
  31 class InputHandlerManager;
  32 class SynchronousCompositorExternalBeginFrameSource;
  33 struct DidOverscrollParams;
  34
  35 // The purpose of this class is to act as the intermediary between the various
  36 // components that make up the 'synchronous compositor mode' implementation and
  37 // expose their functionality via the SynchronousCompositor interface.
  38 // This class is created on the main thread but most of the APIs are called
  39 // from the Compositor thread.
  40 class SynchronousCompositorImpl
  41     : public cc::LayerScrollOffsetDelegate,
  42       public SynchronousInputHandler,
  43       public SynchronousCompositor,
  44       public WebContentsUserData<SynchronousCompositorImpl> {
  45  public:
  46   // When used from browser code, use both |process_id| and |routing_id|.
  47   static SynchronousCompositorImpl* FromID(int process_id, int routing_id);
  48   // When handling upcalls from renderer code, use this version; the process id
  49   // is implicitly that of the in-process renderer.
  50   static SynchronousCompositorImpl* FromRoutingID(int routing_id);
  51
  52   InputEventAckState HandleInputEvent(const blink::WebInputEvent& input_event);
  53
  54   // Called by SynchronousCompositorRegistry.
  55   void DidInitializeRendererObjects(
  56       SynchronousCompositorOutputSurface* output_surface,
  57       SynchronousCompositorExternalBeginFrameSource* begin_frame_source,
  58       cc::InputHandler* input_handler,
  59       SynchronousInputHandlerProxy* synchronous_input_handler_proxy);
  60   void DidDestroyRendererObjects();
  61
  62   // Called by SynchronousCompositorExternalBeginFrameSource.
  63   void OnNeedsBeginFramesChange(bool needs_begin_frames);
  64
  65   // Called by SynchronousCompositorOutputSurface.
  66   void PostInvalidate();
  67
  68   // Called by RenderWidgetHostViewAndroid.
  69   void BeginFrame(const cc::BeginFrameArgs& args);
  70
  71   // SynchronousCompositor
  72   scoped_ptr<cc::CompositorFrame> DemandDrawHw(
  73       gfx::Size surface_size,
  74       const gfx::Transform& transform,
  75       gfx::Rect viewport,
  76       gfx::Rect clip,
  77       gfx::Rect viewport_rect_for_tile_priority,
  78       const gfx::Transform& transform_for_tile_priority) override;
  79   bool DemandDrawSw(SkCanvas* canvas) override;
  80   void ReturnResources(const cc::CompositorFrameAck& frame_ack) override;
  81   void SetMemoryPolicy(size_t bytes_limit) override;
  82   void DidChangeRootLayerScrollOffset(
  83       const gfx::ScrollOffset& root_offset) override;
  84   void SetIsActive(bool is_active) override;
  85   void OnComputeScroll(base::TimeTicks animation_time) override;
  86
  87   // SynchronousInputHandler
  88   void SetNeedsSynchronousAnimateInput() override;
  89
  90   // LayerScrollOffsetDelegate
  91   void UpdateRootLayerState(const gfx::ScrollOffset& total_scroll_offset,
  92                             const gfx::ScrollOffset& max_scroll_offset,
  93                             const gfx::SizeF& scrollable_size,
  94                             float page_scale_factor,
  95                             float min_page_scale_factor,
  96                             float max_page_scale_factor) override;
  97
  98   void DidOverscroll(const DidOverscrollParams& params);
  99   void DidStopFlinging();
 100
 101  private:
 102   friend class WebContentsUserData<SynchronousCompositorImpl>;
 103   friend class SynchronousCompositor;
 104   explicit SynchronousCompositorImpl(WebContents* contents);
 105   ~SynchronousCompositorImpl() override;
 106
 107   void SetClient(SynchronousCompositorClient* compositor_client);
 108   void RegisterWithClient();
 109   void UpdateFrameMetaData(const cc::CompositorFrameMetadata& frame_info);
 110   void DidActivatePendingTree();
 111   void DeliverMessages();
 112   bool CalledOnValidThread() const;
 113   void UpdateNeedsBeginFrames();
 114
 115   SynchronousCompositorClient* compositor_client_;
 116   SynchronousCompositorOutputSurface* output_surface_;
 117   SynchronousCompositorExternalBeginFrameSource* begin_frame_source_;
 118   WebContents* contents_;
 119   const int routing_id_;
 120   cc::InputHandler* input_handler_;
 121   SynchronousInputHandlerProxy* synchronous_input_handler_proxy_;
 122   bool registered_with_client_;
 123   bool is_active_;
 124   bool renderer_needs_begin_frames_;
 125   bool need_animate_input_;
 126
 127   base::WeakPtrFactory<SynchronousCompositorImpl> weak_ptr_factory_;
 128
 129   DISALLOW_COPY_AND_ASSIGN(SynchronousCompositorImpl);
 130 };
 131
 132 }  // namespace content
 133
 134 #endif  // CONTENT_BROWSER_ANDROID_IN_PROCESS_SYNCHRONOUS_COMPOSITOR_IMPL_H_