1 // Copyright 2011 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.
5 #ifndef CC_TREES_LAYER_TREE_HOST_IMPL_H_
6 #define CC_TREES_LAYER_TREE_HOST_IMPL_H_
13 #include "base/basictypes.h"
14 #include "base/containers/hash_tables.h"
15 #include "base/memory/scoped_ptr.h"
16 #include "base/time/time.h"
17 #include "cc/animation/animation_events.h"
18 #include "cc/animation/animation_registrar.h"
19 #include "cc/animation/scrollbar_animation_controller.h"
20 #include "cc/base/cc_export.h"
21 #include "cc/debug/micro_benchmark_controller_impl.h"
22 #include "cc/input/input_handler.h"
23 #include "cc/input/layer_scroll_offset_delegate.h"
24 #include "cc/input/top_controls_manager_client.h"
25 #include "cc/layers/layer_lists.h"
26 #include "cc/layers/render_pass_sink.h"
27 #include "cc/output/begin_frame_args.h"
28 #include "cc/output/managed_memory_policy.h"
29 #include "cc/output/output_surface_client.h"
30 #include "cc/output/renderer.h"
31 #include "cc/quads/render_pass.h"
32 #include "cc/resources/resource_provider.h"
33 #include "cc/resources/tile_manager.h"
34 #include "cc/scheduler/draw_result.h"
35 #include "skia/ext/refptr.h"
36 #include "third_party/skia/include/core/SkColor.h"
37 #include "ui/gfx/rect.h"
41 class CompletionEvent;
42 class CompositorFrameMetadata;
43 class DebugRectHistory;
44 class EvictionTilePriorityQueue;
45 class FrameRateCounter;
47 class LayerTreeHostImplTimeSourceAdapter;
50 class PageScaleAnimation;
51 class PaintTimeCounter;
52 class PictureLayerImpl;
53 class RasterTilePriorityQueue;
54 class RasterWorkerPool;
55 class RenderPassDrawQuad;
56 class RenderingStatsInstrumentation;
58 class ScrollbarLayerImplBase;
59 class TextureMailboxDeleter;
60 class TopControlsManager;
61 class UIResourceBitmap;
62 class UIResourceRequest;
63 struct RendererCapabilitiesImpl;
65 // LayerTreeHost->Proxy callback interface.
66 class LayerTreeHostImplClient {
68 virtual void UpdateRendererCapabilitiesOnImplThread() = 0;
69 virtual void DidLoseOutputSurfaceOnImplThread() = 0;
70 virtual void CommitVSyncParameters(base::TimeTicks timebase,
71 base::TimeDelta interval) = 0;
72 virtual void SetEstimatedParentDrawTime(base::TimeDelta draw_time) = 0;
73 virtual void SetMaxSwapsPendingOnImplThread(int max) = 0;
74 virtual void DidSwapBuffersOnImplThread() = 0;
75 virtual void DidSwapBuffersCompleteOnImplThread() = 0;
76 virtual void BeginFrame(const BeginFrameArgs& args) = 0;
77 virtual void OnCanDrawStateChanged(bool can_draw) = 0;
78 virtual void NotifyReadyToActivate() = 0;
79 // Please call these 3 functions through
80 // LayerTreeHostImpl's SetNeedsRedraw(), SetNeedsRedrawRect() and
82 virtual void SetNeedsRedrawOnImplThread() = 0;
83 virtual void SetNeedsRedrawRectOnImplThread(const gfx::Rect& damage_rect) = 0;
84 virtual void SetNeedsAnimateOnImplThread() = 0;
85 virtual void DidInitializeVisibleTileOnImplThread() = 0;
86 virtual void SetNeedsCommitOnImplThread() = 0;
87 virtual void SetNeedsManageTilesOnImplThread() = 0;
88 virtual void PostAnimationEventsToMainThreadOnImplThread(
89 scoped_ptr<AnimationEventsVector> events) = 0;
90 // Returns true if resources were deleted by this call.
91 virtual bool ReduceContentsTextureMemoryOnImplThread(
93 int priority_cutoff) = 0;
94 virtual bool IsInsideDraw() = 0;
95 virtual void RenewTreePriority() = 0;
96 virtual void PostDelayedScrollbarFadeOnImplThread(
97 const base::Closure& start_fade,
98 base::TimeDelta delay) = 0;
99 virtual void DidActivateSyncTree() = 0;
100 virtual void DidManageTiles() = 0;
103 virtual ~LayerTreeHostImplClient() {}
106 // LayerTreeHostImpl owns the LayerImpl trees as well as associated rendering
108 class CC_EXPORT LayerTreeHostImpl
109 : public InputHandler,
110 public RendererClient,
111 public TileManagerClient,
112 public OutputSurfaceClient,
113 public TopControlsManagerClient,
114 public ScrollbarAnimationControllerClient,
115 public base::SupportsWeakPtr<LayerTreeHostImpl> {
117 static scoped_ptr<LayerTreeHostImpl> Create(
118 const LayerTreeSettings& settings,
119 LayerTreeHostImplClient* client,
121 RenderingStatsInstrumentation* rendering_stats_instrumentation,
122 SharedBitmapManager* manager,
124 virtual ~LayerTreeHostImpl();
126 // InputHandler implementation
127 virtual void BindToClient(InputHandlerClient* client) OVERRIDE;
128 virtual InputHandler::ScrollStatus ScrollBegin(
129 const gfx::Point& viewport_point,
130 InputHandler::ScrollInputType type) OVERRIDE;
131 virtual InputHandler::ScrollStatus ScrollAnimated(
132 const gfx::Point& viewport_point,
133 const gfx::Vector2dF& scroll_delta) OVERRIDE;
134 virtual bool ScrollBy(const gfx::Point& viewport_point,
135 const gfx::Vector2dF& scroll_delta) OVERRIDE;
136 virtual bool ScrollVerticallyByPage(const gfx::Point& viewport_point,
137 ScrollDirection direction) OVERRIDE;
138 virtual void SetRootLayerScrollOffsetDelegate(
139 LayerScrollOffsetDelegate* root_layer_scroll_offset_delegate) OVERRIDE;
140 virtual void OnRootLayerDelegatedScrollOffsetChanged() OVERRIDE;
141 virtual void ScrollEnd() OVERRIDE;
142 virtual InputHandler::ScrollStatus FlingScrollBegin() OVERRIDE;
143 virtual void MouseMoveAt(const gfx::Point& viewport_point) OVERRIDE;
144 virtual void PinchGestureBegin() OVERRIDE;
145 virtual void PinchGestureUpdate(float magnify_delta,
146 const gfx::Point& anchor) OVERRIDE;
147 virtual void PinchGestureEnd() OVERRIDE;
148 virtual void StartPageScaleAnimation(const gfx::Vector2d& target_offset,
151 base::TimeDelta duration) OVERRIDE;
152 virtual void SetNeedsAnimate() OVERRIDE;
153 virtual bool IsCurrentlyScrollingLayerAt(
154 const gfx::Point& viewport_point,
155 InputHandler::ScrollInputType type) OVERRIDE;
156 virtual bool HaveTouchEventHandlersAt(
157 const gfx::Point& viewport_port) OVERRIDE;
158 virtual scoped_ptr<SwapPromiseMonitor> CreateLatencyInfoSwapPromiseMonitor(
159 ui::LatencyInfo* latency) OVERRIDE;
161 // TopControlsManagerClient implementation.
162 virtual void SetControlsTopOffset(float offset) OVERRIDE;
163 virtual float ControlsTopOffset() const OVERRIDE;
164 virtual void DidChangeTopControlsPosition() OVERRIDE;
165 virtual bool HaveRootScrollLayer() const OVERRIDE;
167 struct CC_EXPORT FrameData : public RenderPassSink {
169 virtual ~FrameData();
170 void AsValueInto(base::debug::TracedValue* value) const;
172 std::vector<gfx::Rect> occluding_screen_space_rects;
173 std::vector<gfx::Rect> non_occluding_screen_space_rects;
174 RenderPassList render_passes;
175 RenderPassIdHashMap render_passes_by_id;
176 const LayerImplList* render_surface_layer_list;
177 LayerImplList will_draw_layers;
178 bool contains_incomplete_tile;
181 // RenderPassSink implementation.
182 virtual void AppendRenderPass(scoped_ptr<RenderPass> render_pass) OVERRIDE;
185 virtual void BeginMainFrameAborted(bool did_handle);
186 virtual void BeginCommit();
187 virtual void CommitComplete();
188 virtual void Animate(base::TimeTicks monotonic_time);
189 virtual void UpdateAnimationState(bool start_ready_animations);
190 void ActivateAnimations();
191 void MainThreadHasStoppedFlinging();
192 void UpdateBackgroundAnimateTicking(bool should_background_tick);
193 void DidAnimateScrollOffset();
194 void SetViewportDamage(const gfx::Rect& damage_rect);
196 virtual void ManageTiles();
198 // Returns DRAW_SUCCESS unless problems occured preparing the frame, and we
199 // should try to avoid displaying the frame. If PrepareToDraw is called,
200 // DidDrawAllLayers must also be called, regardless of whether DrawLayers is
201 // called between the two.
202 virtual DrawResult PrepareToDraw(FrameData* frame);
203 virtual void DrawLayers(FrameData* frame, base::TimeTicks frame_begin_time);
204 // Must be called if and only if PrepareToDraw was called.
205 void DidDrawAllLayers(const FrameData& frame);
207 const LayerTreeSettings& settings() const { return settings_; }
209 // Evict all textures by enforcing a memory policy with an allocation of 0.
210 void EvictTexturesForTesting();
212 // When blocking, this prevents client_->NotifyReadyToActivate() from being
213 // called. When disabled, it calls client_->NotifyReadyToActivate()
214 // immediately if any notifications had been blocked while blocking.
215 virtual void BlockNotifyReadyToActivateForTesting(bool block);
217 // This allows us to inject DidInitializeVisibleTile events for testing.
218 void DidInitializeVisibleTileForTesting();
220 // Resets all of the trees to an empty state.
221 void ResetTreesForTesting();
222 void ResetRecycleTreeForTesting();
224 DrawMode GetDrawMode() const;
226 // Viewport size in draw space: this size is in physical pixels and is used
227 // for draw properties, tilings, quads and render passes.
228 gfx::Size DrawViewportSize() const;
230 // Viewport rect in view space used for tiling prioritization.
231 const gfx::Rect ViewportRectForTilePriority() const;
233 // RendererClient implementation.
234 virtual void SetFullRootLayerDamage() OVERRIDE;
236 // TileManagerClient implementation.
237 virtual const std::vector<PictureLayerImpl*>& GetPictureLayers()
239 virtual void NotifyReadyToActivate() OVERRIDE;
240 virtual void NotifyTileStateChanged(const Tile* tile) OVERRIDE;
241 virtual void BuildRasterQueue(RasterTilePriorityQueue* queue,
242 TreePriority tree_priority) OVERRIDE;
243 virtual void BuildEvictionQueue(EvictionTilePriorityQueue* queue,
244 TreePriority tree_priority) OVERRIDE;
246 // ScrollbarAnimationControllerClient implementation.
247 virtual void PostDelayedScrollbarFade(const base::Closure& start_fade,
248 base::TimeDelta delay) OVERRIDE;
249 virtual void SetNeedsScrollbarAnimationFrame() OVERRIDE;
251 // OutputSurfaceClient implementation.
252 virtual void DeferredInitialize() OVERRIDE;
253 virtual void ReleaseGL() OVERRIDE;
254 virtual void CommitVSyncParameters(base::TimeTicks timebase,
255 base::TimeDelta interval) OVERRIDE;
256 virtual void SetNeedsRedrawRect(const gfx::Rect& rect) OVERRIDE;
257 virtual void BeginFrame(const BeginFrameArgs& args) OVERRIDE;
259 virtual void SetExternalDrawConstraints(
260 const gfx::Transform& transform,
261 const gfx::Rect& viewport,
262 const gfx::Rect& clip,
263 const gfx::Rect& viewport_rect_for_tile_priority,
264 const gfx::Transform& transform_for_tile_priority,
265 bool resourceless_software_draw) OVERRIDE;
266 virtual void DidLoseOutputSurface() OVERRIDE;
267 virtual void DidSwapBuffers() OVERRIDE;
268 virtual void DidSwapBuffersComplete() OVERRIDE;
269 virtual void ReclaimResources(const CompositorFrameAck* ack) OVERRIDE;
270 virtual void SetMemoryPolicy(const ManagedMemoryPolicy& policy) OVERRIDE;
271 virtual void SetTreeActivationCallback(const base::Closure& callback)
274 // Called from LayerTreeImpl.
275 void OnCanDrawStateChangedForTree();
278 int id() const { return id_; }
279 bool CanDraw() const;
280 OutputSurface* output_surface() const { return output_surface_.get(); }
282 std::string LayerTreeAsJson() const;
284 void FinishAllRendering();
285 int SourceAnimationFrameNumber() const;
287 virtual bool InitializeRenderer(scoped_ptr<OutputSurface> output_surface);
288 TileManager* tile_manager() { return tile_manager_.get(); }
289 void SetUseGpuRasterization(bool use_gpu);
290 bool use_gpu_rasterization() const { return use_gpu_rasterization_; }
291 bool create_low_res_tiling() const {
292 return settings_.create_low_res_tiling && !use_gpu_rasterization_;
294 ResourcePool* resource_pool() { return resource_pool_.get(); }
295 Renderer* renderer() { return renderer_.get(); }
296 const RendererCapabilitiesImpl& GetRendererCapabilities() const;
298 virtual bool SwapBuffers(const FrameData& frame);
299 void SetNeedsBeginFrame(bool enable);
300 virtual void WillBeginImplFrame(const BeginFrameArgs& args);
301 void DidModifyTilePriorities();
303 LayerTreeImpl* active_tree() { return active_tree_.get(); }
304 const LayerTreeImpl* active_tree() const { return active_tree_.get(); }
305 LayerTreeImpl* pending_tree() { return pending_tree_.get(); }
306 const LayerTreeImpl* pending_tree() const { return pending_tree_.get(); }
307 LayerTreeImpl* recycle_tree() { return recycle_tree_.get(); }
308 const LayerTreeImpl* recycle_tree() const { return recycle_tree_.get(); }
309 // Returns the tree LTH synchronizes with.
310 LayerTreeImpl* sync_tree() {
311 return pending_tree_ ? pending_tree_.get() : active_tree_.get();
313 virtual void CreatePendingTree();
314 virtual void UpdateVisibleTiles();
315 virtual void ActivateSyncTree();
317 // Shortcuts to layers on the active tree.
318 LayerImpl* RootLayer() const;
319 LayerImpl* InnerViewportScrollLayer() const;
320 LayerImpl* OuterViewportScrollLayer() const;
321 LayerImpl* CurrentlyScrollingLayer() const;
323 int scroll_layer_id_when_mouse_over_scrollbar() const {
324 return scroll_layer_id_when_mouse_over_scrollbar_;
326 bool scroll_affects_scroll_handler() const {
327 return scroll_affects_scroll_handler_;
329 void QueueSwapPromiseForMainThreadScrollUpdate(
330 scoped_ptr<SwapPromise> swap_promise);
332 bool IsCurrentlyScrolling() const;
334 virtual void SetVisible(bool visible);
335 bool visible() const { return visible_; }
337 void SetNeedsCommit() { client_->SetNeedsCommitOnImplThread(); }
338 void SetNeedsRedraw();
340 ManagedMemoryPolicy ActualManagedMemoryPolicy() const;
342 size_t memory_allocation_limit_bytes() const;
343 int memory_allocation_priority_cutoff() const;
345 void SetViewportSize(const gfx::Size& device_viewport_size);
346 gfx::Size device_viewport_size() const { return device_viewport_size_; }
348 void SetOverhangUIResource(UIResourceId overhang_ui_resource_id,
349 const gfx::Size& overhang_ui_resource_size);
351 void SetDeviceScaleFactor(float device_scale_factor);
352 float device_scale_factor() const { return device_scale_factor_; }
354 const gfx::Transform& DrawTransform() const;
356 scoped_ptr<ScrollAndScaleSet> ProcessScrollDeltas();
358 bool needs_animate_layers() const {
359 return !animation_registrar_->active_animation_controllers().empty();
362 void set_max_memory_needed_bytes(size_t bytes) {
363 max_memory_needed_bytes_ = bytes;
366 FrameRateCounter* fps_counter() {
367 return fps_counter_.get();
369 PaintTimeCounter* paint_time_counter() {
370 return paint_time_counter_.get();
372 MemoryHistory* memory_history() {
373 return memory_history_.get();
375 DebugRectHistory* debug_rect_history() {
376 return debug_rect_history_.get();
378 ResourceProvider* resource_provider() {
379 return resource_provider_.get();
381 TopControlsManager* top_controls_manager() {
382 return top_controls_manager_.get();
384 const GlobalStateThatImpactsTilePriority& global_tile_state() {
385 return global_tile_state_;
388 Proxy* proxy() const { return proxy_; }
390 AnimationRegistrar* animation_registrar() const {
391 return animation_registrar_.get();
394 void SetDebugState(const LayerTreeDebugState& new_debug_state);
395 const LayerTreeDebugState& debug_state() const { return debug_state_; }
397 class CC_EXPORT CullRenderPassesWithNoQuads {
399 bool ShouldRemoveRenderPass(const RenderPassDrawQuad& quad,
400 const FrameData& frame) const;
402 // Iterates in draw order, so that when a surface is removed, and its
403 // target becomes empty, then its target can be removed also.
404 size_t RenderPassListBegin(const RenderPassList& list) const { return 0; }
405 size_t RenderPassListEnd(const RenderPassList& list) const {
408 size_t RenderPassListNext(size_t it) const { return it + 1; }
411 template <typename RenderPassCuller>
412 static void RemoveRenderPasses(RenderPassCuller culler, FrameData* frame);
414 gfx::Vector2dF accumulated_root_overscroll() const {
415 return accumulated_root_overscroll_;
418 bool pinch_gesture_active() const { return pinch_gesture_active_; }
420 void SetTreePriority(TreePriority priority);
422 void UpdateCurrentBeginFrameArgs(const BeginFrameArgs& args);
423 void ResetCurrentBeginFrameArgsForNextFrame();
424 virtual BeginFrameArgs CurrentBeginFrameArgs() const;
426 // Expected time between two begin impl frame calls.
427 base::TimeDelta begin_impl_frame_interval() const {
428 return begin_impl_frame_interval_;
431 void AsValueInto(base::debug::TracedValue* value) const {
432 return AsValueWithFrameInto(NULL, value);
434 void AsValueWithFrameInto(FrameData* frame,
435 base::debug::TracedValue* value) const;
436 scoped_refptr<base::debug::ConvertableToTraceFormat> AsValue() const;
437 scoped_refptr<base::debug::ConvertableToTraceFormat> AsValueWithFrame(
438 FrameData* frame) const;
439 scoped_refptr<base::debug::ConvertableToTraceFormat> ActivationStateAsValue()
441 void ActivationStateAsValueInto(base::debug::TracedValue* value) const;
443 bool page_scale_animation_active() const { return !!page_scale_animation_; }
445 virtual void CreateUIResource(UIResourceId uid,
446 const UIResourceBitmap& bitmap);
447 // Deletes a UI resource. May safely be called more than once.
448 virtual void DeleteUIResource(UIResourceId uid);
449 void EvictAllUIResources();
450 bool EvictedUIResourcesExist() const;
452 virtual ResourceProvider::ResourceId ResourceIdForUIResource(
453 UIResourceId uid) const;
455 virtual bool IsUIResourceOpaque(UIResourceId uid) const;
457 struct UIResourceData {
458 ResourceProvider::ResourceId resource_id;
463 void ScheduleMicroBenchmark(scoped_ptr<MicroBenchmarkImpl> benchmark);
465 CompositorFrameMetadata MakeCompositorFrameMetadata() const;
466 // Viewport rectangle and clip in nonflipped window space. These rects
467 // should only be used by Renderer subclasses to populate glViewport/glClip
468 // and their software-mode equivalents.
469 gfx::Rect DeviceViewport() const;
470 gfx::Rect DeviceClip() const;
472 // When a SwapPromiseMonitor is created on the impl thread, it calls
473 // InsertSwapPromiseMonitor() to register itself with LayerTreeHostImpl.
474 // When the monitor is destroyed, it calls RemoveSwapPromiseMonitor()
475 // to unregister itself.
476 void InsertSwapPromiseMonitor(SwapPromiseMonitor* monitor);
477 void RemoveSwapPromiseMonitor(SwapPromiseMonitor* monitor);
479 void RegisterPictureLayerImpl(PictureLayerImpl* layer);
480 void UnregisterPictureLayerImpl(PictureLayerImpl* layer);
482 void GetPictureLayerImplPairs(
483 std::vector<PictureLayerImpl::Pair>* layers) const;
485 void SetTopControlsLayoutHeight(float height);
489 const LayerTreeSettings& settings,
490 LayerTreeHostImplClient* client,
492 RenderingStatsInstrumentation* rendering_stats_instrumentation,
493 SharedBitmapManager* manager,
496 void UpdateInnerViewportContainerSize();
498 // Virtual for testing.
499 virtual void AnimateLayers(base::TimeTicks monotonic_time);
501 // Virtual for testing.
502 virtual base::TimeDelta LowFrequencyAnimationInterval() const;
504 const AnimationRegistrar::AnimationControllerMap&
505 active_animation_controllers() const {
506 return animation_registrar_->active_animation_controllers();
509 bool manage_tiles_needed() const { return tile_priorities_dirty_; }
511 LayerTreeHostImplClient* client_;
515 void CreateAndSetRenderer();
516 void CreateAndSetTileManager();
517 void DestroyTileManager();
518 void ReleaseTreeResources();
519 void EnforceZeroBudget(bool zero_budget);
521 bool UsePendingTreeForSync() const;
522 bool UseZeroCopyRasterizer() const;
523 bool UseOneCopyRasterizer() const;
525 void ScrollViewportBy(gfx::Vector2dF scroll_delta);
526 void AnimatePageScale(base::TimeTicks monotonic_time);
527 void AnimateScrollbars(base::TimeTicks monotonic_time);
528 void AnimateTopControls(base::TimeTicks monotonic_time);
530 gfx::Vector2dF ScrollLayerWithViewportSpaceDelta(
531 LayerImpl* layer_impl,
532 float scale_from_viewport_to_screen_space,
533 const gfx::PointF& viewport_point,
534 const gfx::Vector2dF& viewport_delta);
536 void TrackDamageForAllSurfaces(
537 LayerImpl* root_draw_layer,
538 const LayerImplList& render_surface_layer_list);
540 void UpdateTileManagerMemoryPolicy(const ManagedMemoryPolicy& policy);
542 // This function should only be called from PrepareToDraw, as DidDrawAllLayers
543 // must be called if this helper function is called. Returns DRAW_SUCCESS if
544 // the frame should be drawn.
545 DrawResult CalculateRenderPasses(FrameData* frame);
547 void ClearCurrentlyScrollingLayer();
549 bool HandleMouseOverScrollbar(LayerImpl* layer_impl,
550 const gfx::PointF& device_viewport_point);
552 void AnimateScrollbarsRecursive(LayerImpl* layer,
553 base::TimeTicks time);
555 LayerImpl* FindScrollLayerForDeviceViewportPoint(
556 const gfx::PointF& device_viewport_point,
557 InputHandler::ScrollInputType type,
558 LayerImpl* layer_hit_by_point,
559 bool* scroll_on_main_thread,
560 bool* optional_has_ancestor_scroll_handler) const;
561 float DeviceSpaceDistanceToLayer(const gfx::PointF& device_viewport_point,
562 LayerImpl* layer_impl);
563 void StartScrollbarFadeRecursive(LayerImpl* layer);
564 void SetManagedMemoryPolicy(const ManagedMemoryPolicy& policy,
566 void EnforceManagedMemoryPolicy(const ManagedMemoryPolicy& policy);
568 void DidInitializeVisibleTile();
570 void MarkUIResourceNotEvicted(UIResourceId uid);
572 void NotifySwapPromiseMonitorsOfSetNeedsRedraw();
573 void NotifySwapPromiseMonitorsOfForwardingToMainThread();
575 typedef base::hash_map<UIResourceId, UIResourceData>
577 UIResourceMap ui_resource_map_;
579 // Resources that were evicted by EvictAllUIResources. Resources are removed
580 // from this when they are touched by a create or destroy from the UI resource
582 std::set<UIResourceId> evicted_ui_resources_;
584 scoped_ptr<OutputSurface> output_surface_;
586 // |resource_provider_| and |tile_manager_| can be NULL, e.g. when using tile-
587 // free rendering - see OutputSurface::ForcedDrawToSoftwareDevice().
588 scoped_ptr<ResourceProvider> resource_provider_;
589 scoped_ptr<TileManager> tile_manager_;
590 bool use_gpu_rasterization_;
591 scoped_ptr<RasterWorkerPool> raster_worker_pool_;
592 scoped_ptr<ResourcePool> resource_pool_;
593 scoped_ptr<ResourcePool> staging_resource_pool_;
594 scoped_ptr<Renderer> renderer_;
596 GlobalStateThatImpactsTilePriority global_tile_state_;
598 // Tree currently being drawn.
599 scoped_ptr<LayerTreeImpl> active_tree_;
601 // In impl-side painting mode, tree with possibly incomplete rasterized
602 // content. May be promoted to active by ActivatePendingTree().
603 scoped_ptr<LayerTreeImpl> pending_tree_;
605 // In impl-side painting mode, inert tree with layers that can be recycled
606 // by the next sync from the main thread.
607 scoped_ptr<LayerTreeImpl> recycle_tree_;
609 InputHandlerClient* input_handler_client_;
610 bool did_lock_scrolling_layer_;
611 bool should_bubble_scrolls_;
612 bool wheel_scrolling_;
613 bool scroll_affects_scroll_handler_;
614 int scroll_layer_id_when_mouse_over_scrollbar_;
615 ScopedPtrVector<SwapPromise> swap_promises_for_main_thread_scroll_update_;
617 bool tile_priorities_dirty_;
619 // The optional delegate for the root layer scroll offset.
620 LayerScrollOffsetDelegate* root_layer_scroll_offset_delegate_;
621 LayerTreeSettings settings_;
622 LayerTreeDebugState debug_state_;
624 ManagedMemoryPolicy cached_managed_memory_policy_;
626 gfx::Vector2dF accumulated_root_overscroll_;
628 bool pinch_gesture_active_;
629 bool pinch_gesture_end_should_clear_scrolling_layer_;
630 gfx::Point previous_pinch_anchor_;
632 scoped_ptr<TopControlsManager> top_controls_manager_;
634 scoped_ptr<PageScaleAnimation> page_scale_animation_;
636 // This is used for ticking animations slowly when hidden.
637 scoped_ptr<LayerTreeHostImplTimeSourceAdapter> time_source_client_adapter_;
639 scoped_ptr<FrameRateCounter> fps_counter_;
640 scoped_ptr<PaintTimeCounter> paint_time_counter_;
641 scoped_ptr<MemoryHistory> memory_history_;
642 scoped_ptr<DebugRectHistory> debug_rect_history_;
644 scoped_ptr<TextureMailboxDeleter> texture_mailbox_deleter_;
646 // The maximum memory that would be used by the prioritized resource
647 // manager, if there were no limit on memory usage.
648 size_t max_memory_needed_bytes_;
652 // Viewport size passed in from the main thread, in physical pixels. This
653 // value is the default size for all concepts of physical viewport (draw
654 // viewport, scrolling viewport and device viewport), but it can be
656 gfx::Size device_viewport_size_;
658 // Conversion factor from CSS pixels to physical pixels when
659 // pageScaleFactor=1.
660 float device_scale_factor_;
662 // UI resource to use for drawing overhang gutters.
663 UIResourceId overhang_ui_resource_id_;
664 gfx::Size overhang_ui_resource_size_;
666 // Optional top-level constraints that can be set by the OutputSurface.
667 // - external_transform_ applies a transform above the root layer
668 // - external_viewport_ is used DrawProperties, tile management and
669 // glViewport/window projection matrix.
670 // - external_clip_ specifies a top-level clip rect
671 // - viewport_rect_for_tile_priority_ is the rect in view space used for
673 gfx::Transform external_transform_;
674 gfx::Rect external_viewport_;
675 gfx::Rect external_clip_;
676 gfx::Rect viewport_rect_for_tile_priority_;
677 bool resourceless_software_draw_;
679 gfx::Rect viewport_damage_rect_;
681 BeginFrameArgs current_begin_frame_args_;
683 // Expected time between two begin impl frame calls.
684 base::TimeDelta begin_impl_frame_interval_;
686 scoped_ptr<AnimationRegistrar> animation_registrar_;
688 RenderingStatsInstrumentation* rendering_stats_instrumentation_;
689 MicroBenchmarkControllerImpl micro_benchmark_controller_;
691 bool need_to_update_visible_tiles_before_draw_;
693 // Optional callback to notify of new tree activations.
694 base::Closure tree_activation_callback_;
696 SharedBitmapManager* shared_bitmap_manager_;
699 std::set<SwapPromiseMonitor*> swap_promise_monitor_;
701 std::vector<PictureLayerImpl*> picture_layers_;
702 std::vector<PictureLayerImpl::Pair> picture_layer_pairs_;
704 DISALLOW_COPY_AND_ASSIGN(LayerTreeHostImpl);
709 #endif // CC_TREES_LAYER_TREE_HOST_IMPL_H_