content/browser/compositor/delegated_frame_host.h

   1 // Copyright 2014 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_COMPOSITOR_DELEGATED_FRAME_HOST_H_
   6 #define CONTENT_BROWSER_COMPOSITOR_DELEGATED_FRAME_HOST_H_
   7
   8 #include "cc/layers/delegated_frame_provider.h"
   9 #include "cc/layers/delegated_frame_resource_collection.h"
  10 #include "cc/output/copy_output_result.h"
  11 #include "cc/surfaces/surface_factory_client.h"
  12 #include "content/browser/compositor/image_transport_factory.h"
  13 #include "content/browser/compositor/owned_mailbox.h"
  14 #include "content/browser/renderer_host/delegated_frame_evictor.h"
  15 #include "content/browser/renderer_host/dip_util.h"
  16 #include "content/browser/renderer_host/render_widget_host_impl.h"
  17 #include "content/public/browser/render_process_host.h"
  18 #include "ui/compositor/compositor.h"
  19 #include "ui/compositor/compositor_observer.h"
  20 #include "ui/compositor/compositor_vsync_manager.h"
  21 #include "ui/compositor/layer.h"
  22 #include "ui/compositor/layer_owner_delegate.h"
  23 #include "ui/gfx/rect_conversions.h"
  24
  25 namespace cc {
  26 class SurfaceFactory;
  27 }
  28
  29 namespace media {
  30 class VideoFrame;
  31 }
  32
  33 namespace content {
  34
  35 class DelegatedFrameHost;
  36 class ReadbackYUVInterface;
  37 class RenderWidgetHostViewFrameSubscriber;
  38 class RenderWidgetHostImpl;
  39 class ResizeLock;
  40
  41 // The DelegatedFrameHostClient is the interface from the DelegatedFrameHost,
  42 // which manages delegated frames, and the ui::Compositor being used to
  43 // display them.
  44 class CONTENT_EXPORT DelegatedFrameHostClient {
  45  public:
  46   virtual ui::Compositor* GetCompositor() const = 0;
  47   virtual ui::Layer* GetLayer() = 0;
  48   virtual RenderWidgetHostImpl* GetHost() = 0;
  49   virtual bool IsVisible() = 0;
  50   virtual scoped_ptr<ResizeLock> CreateResizeLock(
  51       bool defer_compositor_lock) = 0;
  52   virtual gfx::Size DesiredFrameSize() = 0;
  53
  54   // TODO(ccameron): It is likely that at least one of these two functions is
  55   // redundant. Find which one, and delete it.
  56   virtual float CurrentDeviceScaleFactor() = 0;
  57   virtual gfx::Size ConvertViewSizeToPixel(const gfx::Size& size) = 0;
  58
  59   // These are to be overridden for testing only.
  60   // TODO(ccameron): This is convoluted. Make the tests that need to override
  61   // these functions test DelegatedFrameHost directly (rather than do it
  62   // through RenderWidgetHostViewAura).
  63   virtual DelegatedFrameHost* GetDelegatedFrameHost() const = 0;
  64   virtual bool ShouldCreateResizeLock();
  65   virtual void RequestCopyOfOutput(scoped_ptr<cc::CopyOutputRequest> request);
  66 };
  67
  68 // The DelegatedFrameHost is used to host all of the RenderWidgetHostView state
  69 // and functionality that is associated with delegated frames being sent from
  70 // the RenderWidget. The DelegatedFrameHost will push these changes through to
  71 // the ui::Compositor associated with its DelegatedFrameHostClient.
  72 class CONTENT_EXPORT DelegatedFrameHost
  73     : public ui::CompositorObserver,
  74       public ui::CompositorVSyncManager::Observer,
  75       public ui::LayerOwnerDelegate,
  76       public ImageTransportFactoryObserver,
  77       public DelegatedFrameEvictorClient,
  78       public cc::DelegatedFrameResourceCollectionClient,
  79       public cc::SurfaceFactoryClient,
  80       public base::SupportsWeakPtr<DelegatedFrameHost> {
  81  public:
  82   DelegatedFrameHost(DelegatedFrameHostClient* client);
  83   virtual ~DelegatedFrameHost();
  84
  85   bool CanCopyToBitmap() const;
  86
  87   // Public interface exposed to RenderWidgetHostView.
  88   void SwapDelegatedFrame(
  89       uint32 output_surface_id,
  90       scoped_ptr<cc::DelegatedFrameData> frame_data,
  91       float frame_device_scale_factor,
  92       const std::vector<ui::LatencyInfo>& latency_info);
  93   void WasHidden();
  94   void WasShown(const ui::LatencyInfo& latency_info);
  95   void WasResized();
  96   bool HasSavedFrame();
  97   gfx::Size GetRequestedRendererSize() const;
  98   void AddedToWindow();
  99   void RemovingFromWindow();
 100   void CopyFromCompositingSurface(
 101       const gfx::Rect& src_subrect,
 102       const gfx::Size& output_size,
 103       const base::Callback<void(bool, const SkBitmap&)>& callback,
 104       const SkColorType color_type);
 105   void CopyFromCompositingSurfaceToVideoFrame(
 106       const gfx::Rect& src_subrect,
 107       const scoped_refptr<media::VideoFrame>& target,
 108       const base::Callback<void(bool)>& callback);
 109   bool CanCopyToVideoFrame() const;
 110   bool CanSubscribeFrame() const;
 111   void BeginFrameSubscription(
 112       scoped_ptr<RenderWidgetHostViewFrameSubscriber> subscriber);
 113   void EndFrameSubscription();
 114   bool HasFrameSubscriber() const { return frame_subscriber_; }
 115
 116   // Exposed for tests.
 117   cc::DelegatedFrameProvider* FrameProviderForTesting() const {
 118     return frame_provider_.get();
 119   }
 120   void OnCompositingDidCommitForTesting(ui::Compositor* compositor) {
 121     OnCompositingDidCommit(compositor);
 122   }
 123   bool ShouldCreateResizeLockForTesting() { return ShouldCreateResizeLock(); }
 124   bool ReleasedFrontLockActiveForTesting() const {
 125     return !!released_front_lock_.get();
 126   }
 127
 128  private:
 129   friend class DelegatedFrameHostClient;
 130   FRIEND_TEST_ALL_PREFIXES(RenderWidgetHostViewAuraTest,
 131                            SkippedDelegatedFrames);
 132   FRIEND_TEST_ALL_PREFIXES(RenderWidgetHostViewAuraTest,
 133                            DiscardDelegatedFramesWithLocking);
 134   FRIEND_TEST_ALL_PREFIXES(RenderWidgetHostViewAuraCopyRequestTest,
 135                            DestroyedAfterCopyRequest);
 136
 137   RenderWidgetHostViewFrameSubscriber* frame_subscriber() const {
 138     return frame_subscriber_.get();
 139   }
 140   bool ShouldCreateResizeLock();
 141   void RequestCopyOfOutput(scoped_ptr<cc::CopyOutputRequest> request);
 142
 143   void LockResources();
 144   void UnlockResources();
 145
 146   // Overridden from ui::CompositorObserver:
 147   virtual void OnCompositingDidCommit(ui::Compositor* compositor) OVERRIDE;
 148   virtual void OnCompositingStarted(ui::Compositor* compositor,
 149                                     base::TimeTicks start_time) OVERRIDE;
 150   virtual void OnCompositingEnded(ui::Compositor* compositor) OVERRIDE;
 151   virtual void OnCompositingAborted(ui::Compositor* compositor) OVERRIDE;
 152   virtual void OnCompositingLockStateChanged(
 153       ui::Compositor* compositor) OVERRIDE;
 154
 155   // Overridden from ui::CompositorVSyncManager::Observer:
 156   virtual void OnUpdateVSyncParameters(base::TimeTicks timebase,
 157                                        base::TimeDelta interval) OVERRIDE;
 158
 159   // Overridden from ui::LayerOwnerObserver:
 160   virtual void OnLayerRecreated(ui::Layer* old_layer,
 161                                 ui::Layer* new_layer) OVERRIDE;
 162
 163   // Overridden from ImageTransportFactoryObserver:
 164   virtual void OnLostResources() OVERRIDE;
 165
 166   bool ShouldSkipFrame(gfx::Size size_in_dip) const;
 167
 168   // Lazily grab a resize lock if the aura window size doesn't match the current
 169   // frame size, to give time to the renderer.
 170   void MaybeCreateResizeLock();
 171
 172   // Checks if the resize lock can be released because we received an new frame.
 173   void CheckResizeLock();
 174
 175   // Run all on compositing commit callbacks.
 176   void RunOnCommitCallbacks();
 177
 178   // Add on compositing commit callback.
 179   void AddOnCommitCallbackAndDisableLocks(const base::Closure& callback);
 180
 181   // Called after async thumbnailer task completes.  Scales and crops the result
 182   // of the copy.
 183   static void CopyFromCompositingSurfaceHasResult(
 184       const gfx::Size& dst_size_in_pixel,
 185       const SkColorType color_type,
 186       const base::Callback<void(bool, const SkBitmap&)>& callback,
 187       scoped_ptr<cc::CopyOutputResult> result);
 188   static void PrepareTextureCopyOutputResult(
 189       const gfx::Size& dst_size_in_pixel,
 190       const SkColorType color_type,
 191       const base::Callback<void(bool, const SkBitmap&)>& callback,
 192       scoped_ptr<cc::CopyOutputResult> result);
 193   static void PrepareBitmapCopyOutputResult(
 194       const gfx::Size& dst_size_in_pixel,
 195       const SkColorType color_type,
 196       const base::Callback<void(bool, const SkBitmap&)>& callback,
 197       scoped_ptr<cc::CopyOutputResult> result);
 198   static void CopyFromCompositingSurfaceHasResultForVideo(
 199       base::WeakPtr<DelegatedFrameHost> rwhva,
 200       scoped_refptr<OwnedMailbox> subscriber_texture,
 201       scoped_refptr<media::VideoFrame> video_frame,
 202       const base::Callback<void(bool)>& callback,
 203       scoped_ptr<cc::CopyOutputResult> result);
 204   static void CopyFromCompositingSurfaceFinishedForVideo(
 205       base::WeakPtr<DelegatedFrameHost> rwhva,
 206       const base::Callback<void(bool)>& callback,
 207       scoped_refptr<OwnedMailbox> subscriber_texture,
 208       scoped_ptr<cc::SingleReleaseCallback> release_callback,
 209       bool result);
 210   static void ReturnSubscriberTexture(
 211       base::WeakPtr<DelegatedFrameHost> rwhva,
 212       scoped_refptr<OwnedMailbox> subscriber_texture,
 213       uint32 sync_point);
 214
 215   void SendDelegatedFrameAck(uint32 output_surface_id);
 216   void SendReturnedDelegatedResources(uint32 output_surface_id);
 217
 218   // DelegatedFrameEvictorClient implementation.
 219   virtual void EvictDelegatedFrame() OVERRIDE;
 220
 221   // cc::DelegatedFrameProviderClient implementation.
 222   virtual void UnusedResourcesAreAvailable() OVERRIDE;
 223
 224   // cc::SurfaceFactoryClient implementation.
 225   virtual void ReturnResources(
 226       const cc::ReturnedResourceArray& resources) OVERRIDE;
 227
 228   void DidReceiveFrameFromRenderer(const gfx::Rect& damage_rect);
 229
 230   DelegatedFrameHostClient* client_;
 231
 232   // True if this renders into a Surface, false if it renders into a delegated
 233   // layer.
 234   bool use_surfaces_;
 235
 236   std::vector<base::Closure> on_compositing_did_commit_callbacks_;
 237
 238   // The vsync manager we are observing for changes, if any.
 239   scoped_refptr<ui::CompositorVSyncManager> vsync_manager_;
 240
 241   // The current VSync timebase and interval. These are zero until the first
 242   // call to OnUpdateVSyncParameters().
 243   base::TimeTicks vsync_timebase_;
 244   base::TimeDelta vsync_interval_;
 245
 246   // With delegated renderer, this is the last output surface, used to
 247   // disambiguate resources with the same id coming from different output
 248   // surfaces.
 249   uint32 last_output_surface_id_;
 250
 251   // The number of delegated frame acks that are pending, to delay resource
 252   // returns until the acks are sent.
 253   int pending_delegated_ack_count_;
 254
 255   // True after a delegated frame has been skipped, until a frame is not
 256   // skipped.
 257   bool skipped_frames_;
 258   std::vector<ui::LatencyInfo> skipped_latency_info_list_;
 259
 260   // Holds delegated resources that have been given to a DelegatedFrameProvider,
 261   // and gives back resources when they are no longer in use for return to the
 262   // renderer.
 263   scoped_refptr<cc::DelegatedFrameResourceCollection> resource_collection_;
 264
 265   // Provides delegated frame updates to the cc::DelegatedRendererLayer.
 266   scoped_refptr<cc::DelegatedFrameProvider> frame_provider_;
 267
 268   // State for rendering into a Surface.
 269   scoped_ptr<cc::SurfaceIdAllocator> id_allocator_;
 270   scoped_ptr<cc::SurfaceFactory> surface_factory_;
 271   cc::SurfaceId surface_id_;
 272   gfx::Size current_surface_size_;
 273   cc::ReturnedResourceArray surface_returned_resources_;
 274
 275   // This lock is the one waiting for a frame of the right size to come back
 276   // from the renderer/GPU process. It is set from the moment the aura window
 277   // got resized, to the moment we committed the renderer frame of the same
 278   // size. It keeps track of the size we expect from the renderer, and locks the
 279   // compositor, as well as the UI for a short time to give a chance to the
 280   // renderer of producing a frame of the right size.
 281   scoped_ptr<ResizeLock> resize_lock_;
 282
 283   // Keeps track of the current frame size.
 284   gfx::Size current_frame_size_in_dip_;
 285
 286   // This lock is for waiting for a front surface to become available to draw.
 287   scoped_refptr<ui::CompositorLock> released_front_lock_;
 288
 289   enum CanLockCompositorState {
 290     YES_CAN_LOCK,
 291     // We locked, so at some point we'll need to kick a frame.
 292     YES_DID_LOCK,
 293     // No. A lock timed out, we need to kick a new frame before locking again.
 294     NO_PENDING_RENDERER_FRAME,
 295     // No. We've got a frame, but it hasn't been committed.
 296     NO_PENDING_COMMIT,
 297   };
 298   CanLockCompositorState can_lock_compositor_;
 299
 300   base::TimeTicks last_draw_ended_;
 301
 302   // Subscriber that listens to frame presentation events.
 303   scoped_ptr<RenderWidgetHostViewFrameSubscriber> frame_subscriber_;
 304   std::vector<scoped_refptr<OwnedMailbox> > idle_frame_subscriber_textures_;
 305
 306   // YUV readback pipeline.
 307   scoped_ptr<content::ReadbackYUVInterface>
 308       yuv_readback_pipeline_;
 309
 310   scoped_ptr<DelegatedFrameEvictor> delegated_frame_evictor_;
 311 };
 312
 313 }  // namespace content
 314
 315 #endif  // CONTENT_BROWSER_COMPOSITOR_DELEGATED_FRAME_HOST_H_