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/browser/renderer_host/render_widget_host_view_base.h"
  18 #include "content/public/browser/render_process_host.h"
  19 #include "ui/compositor/compositor.h"
  20 #include "ui/compositor/compositor_observer.h"
  21 #include "ui/compositor/compositor_vsync_manager.h"
  22 #include "ui/compositor/layer.h"
  23 #include "ui/compositor/layer_owner_delegate.h"
  24 #include "ui/gfx/geometry/rect_conversions.h"
  25
  26 namespace base {
  27 class TickClock;
  28 }
  29
  30 namespace cc {
  31 class SurfaceFactory;
  32 enum class SurfaceDrawStatus;
  33 }
  34
  35 namespace media {
  36 class VideoFrame;
  37 }
  38
  39 namespace content {
  40
  41 class DelegatedFrameHost;
  42 class ReadbackYUVInterface;
  43 class RenderWidgetHostViewFrameSubscriber;
  44 class RenderWidgetHostImpl;
  45 class ResizeLock;
  46
  47 // The DelegatedFrameHostClient is the interface from the DelegatedFrameHost,
  48 // which manages delegated frames, and the ui::Compositor being used to
  49 // display them.
  50 class CONTENT_EXPORT DelegatedFrameHostClient {
  51  public:
  52   virtual ui::Layer* DelegatedFrameHostGetLayer() const = 0;
  53   virtual bool DelegatedFrameHostIsVisible() const = 0;
  54   virtual gfx::Size DelegatedFrameHostDesiredSizeInDIP() const = 0;
  55
  56   virtual bool DelegatedFrameCanCreateResizeLock() const = 0;
  57   virtual scoped_ptr<ResizeLock> DelegatedFrameHostCreateResizeLock(
  58       bool defer_compositor_lock) = 0;
  59   virtual void DelegatedFrameHostResizeLockWasReleased() = 0;
  60
  61   virtual void DelegatedFrameHostSendCompositorSwapAck(
  62       int output_surface_id,
  63       const cc::CompositorFrameAck& ack) = 0;
  64   virtual void DelegatedFrameHostSendReclaimCompositorResources(
  65       int output_surface_id,
  66       const cc::CompositorFrameAck& ack) = 0;
  67   virtual void DelegatedFrameHostOnLostCompositorResources() = 0;
  68
  69   virtual void DelegatedFrameHostUpdateVSyncParameters(
  70       const base::TimeTicks& timebase,
  71       const base::TimeDelta& interval) = 0;
  72 };
  73
  74 // The DelegatedFrameHost is used to host all of the RenderWidgetHostView state
  75 // and functionality that is associated with delegated frames being sent from
  76 // the RenderWidget. The DelegatedFrameHost will push these changes through to
  77 // the ui::Compositor associated with its DelegatedFrameHostClient.
  78 class CONTENT_EXPORT DelegatedFrameHost
  79     : public ui::CompositorObserver,
  80       public ui::CompositorVSyncManager::Observer,
  81       public ui::LayerOwnerDelegate,
  82       public ImageTransportFactoryObserver,
  83       public DelegatedFrameEvictorClient,
  84       public cc::DelegatedFrameResourceCollectionClient,
  85       public cc::SurfaceFactoryClient,
  86       public base::SupportsWeakPtr<DelegatedFrameHost> {
  87  public:
  88   DelegatedFrameHost(DelegatedFrameHostClient* client);
  89   ~DelegatedFrameHost() override;
  90
  91   // ui::CompositorObserver implementation.
  92   void OnCompositingDidCommit(ui::Compositor* compositor) override;
  93   void OnCompositingStarted(ui::Compositor* compositor,
  94                             base::TimeTicks start_time) override;
  95   void OnCompositingEnded(ui::Compositor* compositor) override;
  96   void OnCompositingAborted(ui::Compositor* compositor) override;
  97   void OnCompositingLockStateChanged(ui::Compositor* compositor) override;
  98   void OnCompositingShuttingDown(ui::Compositor* compositor) override;
  99
 100   // ui::CompositorVSyncManager::Observer implementation.
 101   void OnUpdateVSyncParameters(base::TimeTicks timebase,
 102                                base::TimeDelta interval) override;
 103
 104   // ui::LayerOwnerObserver implementation.
 105   void OnLayerRecreated(ui::Layer* old_layer, ui::Layer* new_layer) override;
 106
 107   // ImageTransportFactoryObserver implementation.
 108   void OnLostResources() override;
 109
 110   // DelegatedFrameEvictorClient implementation.
 111   void EvictDelegatedFrame() override;
 112
 113   // cc::DelegatedFrameProviderClient implementation.
 114   void UnusedResourcesAreAvailable() override;
 115
 116   // cc::SurfaceFactoryClient implementation.
 117   void ReturnResources(const cc::ReturnedResourceArray& resources) override;
 118
 119   bool CanCopyToBitmap() const;
 120
 121   // Public interface exposed to RenderWidgetHostView.
 122
 123   // Note: |satisfies_sequences| is cleared in calls to this function.
 124   void SwapDelegatedFrame(
 125       uint32 output_surface_id,
 126       scoped_ptr<cc::DelegatedFrameData> frame_data,
 127       float frame_device_scale_factor,
 128       const std::vector<ui::LatencyInfo>& latency_info,
 129       std::vector<uint32_t>* satisfies_sequences);
 130   void WasHidden();
 131   void WasShown(const ui::LatencyInfo& latency_info);
 132   void WasResized();
 133   bool HasSavedFrame();
 134   gfx::Size GetRequestedRendererSize() const;
 135   void SetCompositor(ui::Compositor* compositor);
 136   void ResetCompositor();
 137   void SetVSyncParameters(const base::TimeTicks& timebase,
 138                           const base::TimeDelta& interval);
 139   // Note: |src_subset| is specified in DIP dimensions while |output_size|
 140   // expects pixels.
 141   void CopyFromCompositingSurface(const gfx::Rect& src_subrect,
 142                                   const gfx::Size& output_size,
 143                                   ReadbackRequestCallback& callback,
 144                                   const SkColorType preferred_color_type);
 145   void CopyFromCompositingSurfaceToVideoFrame(
 146       const gfx::Rect& src_subrect,
 147       const scoped_refptr<media::VideoFrame>& target,
 148       const base::Callback<void(bool)>& callback);
 149   bool CanCopyToVideoFrame() const;
 150   bool CanSubscribeFrame() const;
 151   void BeginFrameSubscription(
 152       scoped_ptr<RenderWidgetHostViewFrameSubscriber> subscriber);
 153   void EndFrameSubscription();
 154   bool HasFrameSubscriber() const { return frame_subscriber_; }
 155   uint32_t GetSurfaceIdNamespace();
 156   cc::SurfaceId SurfaceIdAtPoint(const gfx::Point& point,
 157                                  gfx::Point* transformed_point);
 158
 159   // Exposed for tests.
 160   cc::DelegatedFrameProvider* FrameProviderForTesting() const {
 161     return frame_provider_.get();
 162   }
 163   cc::SurfaceId SurfaceIdForTesting() const { return surface_id_; }
 164   void OnCompositingDidCommitForTesting(ui::Compositor* compositor) {
 165     OnCompositingDidCommit(compositor);
 166   }
 167   bool ReleasedFrontLockActiveForTesting() const {
 168     return !!released_front_lock_.get();
 169   }
 170   void SetRequestCopyOfOutputCallbackForTesting(
 171       const base::Callback<void(scoped_ptr<cc::CopyOutputRequest>)>& callback) {
 172     request_copy_of_output_callback_for_testing_ = callback;
 173   }
 174
 175  private:
 176   friend class DelegatedFrameHostClient;
 177   friend class RenderWidgetHostViewAuraCopyRequestTest;
 178   FRIEND_TEST_ALL_PREFIXES(RenderWidgetHostViewAuraTest,
 179                            SkippedDelegatedFrames);
 180   FRIEND_TEST_ALL_PREFIXES(RenderWidgetHostViewAuraTest,
 181                            DiscardDelegatedFramesWithLocking);
 182
 183   RenderWidgetHostViewFrameSubscriber* frame_subscriber() const {
 184     return frame_subscriber_.get();
 185   }
 186   bool ShouldCreateResizeLock();
 187   void LockResources();
 188   void UnlockResources();
 189   void RequestCopyOfOutput(scoped_ptr<cc::CopyOutputRequest> request);
 190
 191   bool ShouldSkipFrame(gfx::Size size_in_dip) const;
 192
 193   // Lazily grab a resize lock if the aura window size doesn't match the current
 194   // frame size, to give time to the renderer.
 195   void MaybeCreateResizeLock();
 196
 197   // Checks if the resize lock can be released because we received an new frame.
 198   void CheckResizeLock();
 199
 200   // Run all on compositing commit callbacks.
 201   void RunOnCommitCallbacks();
 202
 203   // Add on compositing commit callback.
 204   void AddOnCommitCallbackAndDisableLocks(const base::Closure& callback);
 205
 206   // Called after async thumbnailer task completes.  Scales and crops the result
 207   // of the copy.
 208   static void CopyFromCompositingSurfaceHasResult(
 209       const gfx::Size& dst_size_in_pixel,
 210       const SkColorType color_type,
 211       ReadbackRequestCallback& callback,
 212       scoped_ptr<cc::CopyOutputResult> result);
 213   static void PrepareTextureCopyOutputResult(
 214       const gfx::Size& dst_size_in_pixel,
 215       const SkColorType color_type,
 216       ReadbackRequestCallback& callback,
 217       scoped_ptr<cc::CopyOutputResult> result);
 218   static void PrepareBitmapCopyOutputResult(
 219       const gfx::Size& dst_size_in_pixel,
 220       const SkColorType color_type,
 221       ReadbackRequestCallback& callback,
 222       scoped_ptr<cc::CopyOutputResult> result);
 223   static void CopyFromCompositingSurfaceHasResultForVideo(
 224       base::WeakPtr<DelegatedFrameHost> rwhva,
 225       scoped_refptr<OwnedMailbox> subscriber_texture,
 226       scoped_refptr<media::VideoFrame> video_frame,
 227       const base::Callback<void(bool)>& callback,
 228       scoped_ptr<cc::CopyOutputResult> result);
 229   static void CopyFromCompositingSurfaceFinishedForVideo(
 230       base::WeakPtr<DelegatedFrameHost> rwhva,
 231       const base::Callback<void(bool)>& callback,
 232       scoped_refptr<OwnedMailbox> subscriber_texture,
 233       scoped_ptr<cc::SingleReleaseCallback> release_callback,
 234       bool result);
 235   static void ReturnSubscriberTexture(
 236       base::WeakPtr<DelegatedFrameHost> rwhva,
 237       scoped_refptr<OwnedMailbox> subscriber_texture,
 238       uint32 sync_point);
 239
 240   void SendDelegatedFrameAck(uint32 output_surface_id);
 241   void SurfaceDrawn(uint32 output_surface_id, cc::SurfaceDrawStatus drawn);
 242   void SendReturnedDelegatedResources(uint32 output_surface_id);
 243
 244   // Called to consult the current |frame_subscriber_|, to determine and maybe
 245   // initiate a copy-into-video-frame request.
 246   void DidReceiveFrameFromRenderer(const gfx::Rect& damage_rect);
 247
 248   DelegatedFrameHostClient* const client_;
 249   ui::Compositor* compositor_;
 250
 251   // True if this renders into a Surface, false if it renders into a delegated
 252   // layer.
 253   bool use_surfaces_;
 254
 255   std::vector<base::Closure> on_compositing_did_commit_callbacks_;
 256
 257   // The vsync manager we are observing for changes, if any.
 258   scoped_refptr<ui::CompositorVSyncManager> vsync_manager_;
 259
 260   // The current VSync timebase and interval. These are zero until the first
 261   // call to SetVSyncParameters().
 262   base::TimeTicks vsync_timebase_;
 263   base::TimeDelta vsync_interval_;
 264
 265   // Overridable tick clock used for testing functions using current time.
 266   scoped_ptr<base::TickClock> tick_clock_;
 267
 268   // With delegated renderer, this is the last output surface, used to
 269   // disambiguate resources with the same id coming from different output
 270   // surfaces.
 271   uint32 last_output_surface_id_;
 272
 273   // The number of delegated frame acks that are pending, to delay resource
 274   // returns until the acks are sent.
 275   int pending_delegated_ack_count_;
 276
 277   // True after a delegated frame has been skipped, until a frame is not
 278   // skipped.
 279   bool skipped_frames_;
 280   std::vector<ui::LatencyInfo> skipped_latency_info_list_;
 281
 282   // Holds delegated resources that have been given to a DelegatedFrameProvider,
 283   // and gives back resources when they are no longer in use for return to the
 284   // renderer.
 285   scoped_refptr<cc::DelegatedFrameResourceCollection> resource_collection_;
 286
 287   // Provides delegated frame updates to the cc::DelegatedRendererLayer.
 288   scoped_refptr<cc::DelegatedFrameProvider> frame_provider_;
 289
 290   // State for rendering into a Surface.
 291   scoped_ptr<cc::SurfaceIdAllocator> id_allocator_;
 292   scoped_ptr<cc::SurfaceFactory> surface_factory_;
 293   cc::SurfaceId surface_id_;
 294   gfx::Size current_surface_size_;
 295   float current_scale_factor_;
 296   cc::ReturnedResourceArray surface_returned_resources_;
 297
 298   // This lock is the one waiting for a frame of the right size to come back
 299   // from the renderer/GPU process. It is set from the moment the aura window
 300   // got resized, to the moment we committed the renderer frame of the same
 301   // size. It keeps track of the size we expect from the renderer, and locks the
 302   // compositor, as well as the UI for a short time to give a chance to the
 303   // renderer of producing a frame of the right size.
 304   scoped_ptr<ResizeLock> resize_lock_;
 305
 306   // Keeps track of the current frame size.
 307   gfx::Size current_frame_size_in_dip_;
 308
 309   // This lock is for waiting for a front surface to become available to draw.
 310   scoped_refptr<ui::CompositorLock> released_front_lock_;
 311
 312   enum CanLockCompositorState {
 313     YES_CAN_LOCK,
 314     // We locked, so at some point we'll need to kick a frame.
 315     YES_DID_LOCK,
 316     // No. A lock timed out, we need to kick a new frame before locking again.
 317     NO_PENDING_RENDERER_FRAME,
 318     // No. We've got a frame, but it hasn't been committed.
 319     NO_PENDING_COMMIT,
 320   };
 321   CanLockCompositorState can_lock_compositor_;
 322
 323   base::TimeTicks last_draw_ended_;
 324
 325   // Subscriber that listens to frame presentation events.
 326   scoped_ptr<RenderWidgetHostViewFrameSubscriber> frame_subscriber_;
 327   std::vector<scoped_refptr<OwnedMailbox> > idle_frame_subscriber_textures_;
 328
 329   // Callback used to pass the output request to the layer or to a function
 330   // specified by a test.
 331   base::Callback<void(scoped_ptr<cc::CopyOutputRequest>)>
 332       request_copy_of_output_callback_for_testing_;
 333
 334   // YUV readback pipeline.
 335   scoped_ptr<content::ReadbackYUVInterface>
 336       yuv_readback_pipeline_;
 337
 338   scoped_ptr<DelegatedFrameEvictor> delegated_frame_evictor_;
 339 };
 340
 341 }  // namespace content
 342
 343 #endif  // CONTENT_BROWSER_COMPOSITOR_DELEGATED_FRAME_HOST_H_