cc/trees/thread_proxy.h

   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.
   4
   5 #ifndef CC_TREES_THREAD_PROXY_H_
   6 #define CC_TREES_THREAD_PROXY_H_
   7
   8 #include <string>
   9
  10 #include "base/memory/scoped_ptr.h"
  11 #include "base/memory/weak_ptr.h"
  12 #include "base/time/time.h"
  13 #include "cc/animation/animation_events.h"
  14 #include "cc/base/completion_event.h"
  15 #include "cc/base/delayed_unique_notifier.h"
  16 #include "cc/resources/resource_update_controller.h"
  17 #include "cc/scheduler/commit_earlyout_reason.h"
  18 #include "cc/scheduler/scheduler.h"
  19 #include "cc/trees/layer_tree_host_impl.h"
  20 #include "cc/trees/proxy.h"
  21 #include "cc/trees/proxy_timing_history.h"
  22
  23 namespace base {
  24 class SingleThreadTaskRunner;
  25 }
  26
  27 namespace cc {
  28
  29 class BeginFrameSource;
  30 class ContextProvider;
  31 class InputHandlerClient;
  32 class LayerTreeHost;
  33 class PrioritizedResourceManager;
  34 class ResourceUpdateQueue;
  35 class Scheduler;
  36 class ScopedThreadProxy;
  37
  38 class CC_EXPORT ThreadProxy : public Proxy,
  39                     NON_EXPORTED_BASE(LayerTreeHostImplClient),
  40                     NON_EXPORTED_BASE(SchedulerClient),
  41                     NON_EXPORTED_BASE(ResourceUpdateControllerClient) {
  42  public:
  43   static scoped_ptr<Proxy> Create(
  44       LayerTreeHost* layer_tree_host,
  45       scoped_refptr<base::SingleThreadTaskRunner> main_task_runner,
  46       scoped_refptr<base::SingleThreadTaskRunner> impl_task_runner,
  47       scoped_ptr<BeginFrameSource> external_begin_frame_source);
  48
  49   ~ThreadProxy() override;
  50
  51   struct BeginMainFrameAndCommitState {
  52     BeginMainFrameAndCommitState();
  53     ~BeginMainFrameAndCommitState();
  54
  55     unsigned int begin_frame_id;
  56     BeginFrameArgs begin_frame_args;
  57     scoped_ptr<ScrollAndScaleSet> scroll_info;
  58     size_t memory_allocation_limit_bytes;
  59     int memory_allocation_priority_cutoff;
  60     bool evicted_ui_resources;
  61   };
  62
  63   struct MainThreadOnly {
  64     MainThreadOnly(ThreadProxy* proxy, int layer_tree_host_id);
  65     ~MainThreadOnly();
  66
  67     const int layer_tree_host_id;
  68
  69     // Set only when SetNeedsAnimate is called.
  70     bool animate_requested;
  71     // Set only when SetNeedsCommit is called.
  72     bool commit_requested;
  73     // Set by SetNeedsAnimate, SetNeedsUpdateLayers, and SetNeedsCommit.
  74     bool commit_request_sent_to_impl_thread;
  75
  76     bool started;
  77     bool prepare_tiles_pending;
  78     bool can_cancel_commit;
  79     bool defer_commits;
  80
  81     RendererCapabilities renderer_capabilities_main_thread_copy;
  82
  83     base::WeakPtrFactory<ThreadProxy> weak_factory;
  84   };
  85
  86   // Accessed on the main thread, or when main thread is blocked.
  87   struct MainThreadOrBlockedMainThread {
  88     explicit MainThreadOrBlockedMainThread(LayerTreeHost* host);
  89     ~MainThreadOrBlockedMainThread();
  90
  91     PrioritizedResourceManager* contents_texture_manager();
  92
  93     LayerTreeHost* layer_tree_host;
  94     bool commit_waits_for_activation;
  95     bool main_thread_inside_commit;
  96   };
  97
  98   struct CompositorThreadOnly {
  99     CompositorThreadOnly(
 100         ThreadProxy* proxy,
 101         int layer_tree_host_id,
 102         RenderingStatsInstrumentation* rendering_stats_instrumentation,
 103         scoped_ptr<BeginFrameSource> external_begin_frame_source);
 104     ~CompositorThreadOnly();
 105
 106     const int layer_tree_host_id;
 107
 108     // Copy of the main thread side contents texture manager for work
 109     // that needs to be done on the compositor thread.
 110     PrioritizedResourceManager* contents_texture_manager;
 111
 112     scoped_ptr<Scheduler> scheduler;
 113
 114     // Set when the main thread is waiting on a
 115     // ScheduledActionSendBeginMainFrame to be issued.
 116     CompletionEvent* begin_main_frame_sent_completion_event;
 117
 118     // Set when the main thread is waiting on a commit to complete.
 119     CompletionEvent* commit_completion_event;
 120
 121     // Set when the main thread is waiting on a pending tree activation.
 122     CompletionEvent* completion_event_for_commit_held_on_tree_activation;
 123
 124     scoped_ptr<ResourceUpdateController> current_resource_update_controller;
 125
 126     // Set when the next draw should post DidCommitAndDrawFrame to the main
 127     // thread.
 128     bool next_frame_is_newly_committed_frame;
 129
 130     bool inside_draw;
 131
 132     bool input_throttled_until_commit;
 133
 134     base::TimeTicks animation_time;
 135
 136     // Whether a commit has been completed since the last time animations were
 137     // ticked. If this happens, we need to animate again.
 138     bool did_commit_after_animating;
 139
 140     DelayedUniqueNotifier smoothness_priority_expiration_notifier;
 141
 142     ProxyTimingHistory timing_history;
 143
 144     scoped_ptr<BeginFrameSource> external_begin_frame_source;
 145
 146     scoped_ptr<LayerTreeHostImpl> layer_tree_host_impl;
 147     base::WeakPtrFactory<ThreadProxy> weak_factory;
 148   };
 149
 150   const MainThreadOnly& main() const;
 151   const MainThreadOrBlockedMainThread& blocked_main() const;
 152   const CompositorThreadOnly& impl() const;
 153
 154   // Proxy implementation
 155   void FinishAllRendering() override;
 156   bool IsStarted() const override;
 157   bool CommitToActiveTree() const override;
 158   void SetOutputSurface(scoped_ptr<OutputSurface>) override;
 159   void SetLayerTreeHostClientReady() override;
 160   void SetVisible(bool visible) override;
 161   void SetThrottleFrameProduction(bool throttle) override;
 162   const RendererCapabilities& GetRendererCapabilities() const override;
 163   void SetNeedsAnimate() override;
 164   void SetNeedsUpdateLayers() override;
 165   void SetNeedsCommit() override;
 166   void SetNeedsRedraw(const gfx::Rect& damage_rect) override;
 167   void SetNextCommitWaitsForActivation() override;
 168   void NotifyInputThrottledUntilCommit() override;
 169   void SetDeferCommits(bool defer_commits) override;
 170   bool CommitRequested() const override;
 171   bool BeginMainFrameRequested() const override;
 172   void MainThreadHasStoppedFlinging() override;
 173   void Start() override;
 174   void Stop() override;
 175   size_t MaxPartialTextureUpdates() const override;
 176   void ForceSerializeOnSwapBuffers() override;
 177   bool SupportsImplScrolling() const override;
 178   void SetDebugState(const LayerTreeDebugState& debug_state) override;
 179   bool MainFrameWillHappenForTesting() override;
 180   void SetChildrenNeedBeginFrames(bool children_need_begin_frames) override;
 181   void SetAuthoritativeVSyncInterval(const base::TimeDelta& interval) override;
 182
 183   // LayerTreeHostImplClient implementation
 184   void UpdateRendererCapabilitiesOnImplThread() override;
 185   void DidLoseOutputSurfaceOnImplThread() override;
 186   void CommitVSyncParameters(base::TimeTicks timebase,
 187                              base::TimeDelta interval) override;
 188   void SetEstimatedParentDrawTime(base::TimeDelta draw_time) override;
 189   void SetMaxSwapsPendingOnImplThread(int max) override;
 190   void DidSwapBuffersOnImplThread() override;
 191   void DidSwapBuffersCompleteOnImplThread() override;
 192   void OnCanDrawStateChanged(bool can_draw) override;
 193   void NotifyReadyToActivate() override;
 194   void NotifyReadyToDraw() override;
 195   // Please call these 3 functions through
 196   // LayerTreeHostImpl's SetNeedsRedraw(), SetNeedsRedrawRect() and
 197   // SetNeedsAnimate().
 198   void SetNeedsRedrawOnImplThread() override;
 199   void SetNeedsRedrawRectOnImplThread(const gfx::Rect& dirty_rect) override;
 200   void SetNeedsAnimateOnImplThread() override;
 201   void SetNeedsPrepareTilesOnImplThread() override;
 202   void SetNeedsCommitOnImplThread() override;
 203   void PostAnimationEventsToMainThreadOnImplThread(
 204       scoped_ptr<AnimationEventsVector> queue) override;
 205   bool ReduceContentsTextureMemoryOnImplThread(size_t limit_bytes,
 206                                                int priority_cutoff) override;
 207   bool IsInsideDraw() override;
 208   void RenewTreePriority() override;
 209   void PostDelayedAnimationTaskOnImplThread(const base::Closure& task,
 210                                             base::TimeDelta delay) override;
 211   void DidActivateSyncTree() override;
 212   void DidPrepareTiles() override;
 213   void DidCompletePageScaleAnimationOnImplThread() override;
 214
 215   // SchedulerClient implementation
 216   void WillBeginImplFrame(const BeginFrameArgs& args) override;
 217   void ScheduledActionSendBeginMainFrame() override;
 218   DrawResult ScheduledActionDrawAndSwapIfPossible() override;
 219   DrawResult ScheduledActionDrawAndSwapForced() override;
 220   void ScheduledActionAnimate() override;
 221   void ScheduledActionCommit() override;
 222   void ScheduledActionActivateSyncTree() override;
 223   void ScheduledActionBeginOutputSurfaceCreation() override;
 224   void ScheduledActionPrepareTiles() override;
 225   void DidAnticipatedDrawTimeChange(base::TimeTicks time) override;
 226   base::TimeDelta DrawDurationEstimate() override;
 227   base::TimeDelta BeginMainFrameToCommitDurationEstimate() override;
 228   base::TimeDelta CommitToActivateDurationEstimate() override;
 229   void DidBeginImplFrameDeadline() override;
 230   void SendBeginFramesToChildren(const BeginFrameArgs& args) override;
 231   void SendBeginMainFrameNotExpectedSoon() override;
 232
 233   // ResourceUpdateControllerClient implementation
 234   void ReadyToFinalizeTextureUpdates() override;
 235
 236  protected:
 237   ThreadProxy(
 238       LayerTreeHost* layer_tree_host,
 239       scoped_refptr<base::SingleThreadTaskRunner> main_task_runner,
 240       scoped_refptr<base::SingleThreadTaskRunner> impl_task_runner,
 241       scoped_ptr<BeginFrameSource> external_begin_frame_source);
 242
 243  private:
 244   // Called on main thread.
 245   void SetRendererCapabilitiesMainThreadCopy(
 246       const RendererCapabilities& capabilities);
 247   void BeginMainFrame(
 248       scoped_ptr<BeginMainFrameAndCommitState> begin_main_frame_state);
 249   void BeginMainFrameNotExpectedSoon();
 250   void DidCommitAndDrawFrame();
 251   void DidCompleteSwapBuffers();
 252   void SetAnimationEvents(scoped_ptr<AnimationEventsVector> queue);
 253   void DidLoseOutputSurface();
 254   void RequestNewOutputSurface();
 255   void DidInitializeOutputSurface(bool success,
 256                                   const RendererCapabilities& capabilities);
 257   void SendCommitRequestToImplThreadIfNeeded();
 258   void DidCompletePageScaleAnimation();
 259
 260   // Called on impl thread.
 261   struct SchedulerStateRequest;
 262
 263   void StartCommitOnImplThread(CompletionEvent* completion,
 264                                ResourceUpdateQueue* queue);
 265   void BeginMainFrameAbortedOnImplThread(CommitEarlyOutReason reason);
 266   void FinishAllRenderingOnImplThread(CompletionEvent* completion);
 267   void InitializeImplOnImplThread(CompletionEvent* completion);
 268   void SetLayerTreeHostClientReadyOnImplThread();
 269   void SetVisibleOnImplThread(CompletionEvent* completion, bool visible);
 270   void SetThrottleFrameProductionOnImplThread(bool throttle);
 271   void HasInitializedOutputSurfaceOnImplThread(
 272       CompletionEvent* completion,
 273       bool* has_initialized_output_surface);
 274   void DeleteContentsTexturesOnImplThread(CompletionEvent* completion);
 275   void InitializeOutputSurfaceOnImplThread(
 276       scoped_ptr<OutputSurface> output_surface);
 277   void FinishGLOnImplThread(CompletionEvent* completion);
 278   void LayerTreeHostClosedOnImplThread(CompletionEvent* completion);
 279   DrawResult DrawSwapInternal(bool forced_draw);
 280   void ForceSerializeOnSwapBuffersOnImplThread(CompletionEvent* completion);
 281   void MainFrameWillHappenOnImplThreadForTesting(CompletionEvent* completion,
 282                                                  bool* main_frame_will_happen);
 283   void SetSwapUsedIncompleteTileOnImplThread(bool used_incomplete_tile);
 284   void MainThreadHasStoppedFlingingOnImplThread();
 285   void SetInputThrottledUntilCommitOnImplThread(bool is_throttled);
 286   void SetDebugStateOnImplThread(const LayerTreeDebugState& debug_state);
 287   void SetDeferCommitsOnImplThread(bool defer_commits) const;
 288
 289   LayerTreeHost* layer_tree_host();
 290   const LayerTreeHost* layer_tree_host() const;
 291
 292   // Use accessors instead of this variable directly.
 293   MainThreadOnly main_thread_only_vars_unsafe_;
 294   MainThreadOnly& main();
 295
 296   // Use accessors instead of this variable directly.
 297   MainThreadOrBlockedMainThread main_thread_or_blocked_vars_unsafe_;
 298   MainThreadOrBlockedMainThread& blocked_main();
 299
 300   // Use accessors instead of this variable directly.
 301   CompositorThreadOnly compositor_thread_vars_unsafe_;
 302   CompositorThreadOnly& impl();
 303
 304   base::WeakPtr<ThreadProxy> main_thread_weak_ptr_;
 305   base::WeakPtr<ThreadProxy> impl_thread_weak_ptr_;
 306
 307   DISALLOW_COPY_AND_ASSIGN(ThreadProxy);
 308 };
 309
 310 }  // namespace cc
 311
 312 #endif  // CC_TREES_THREAD_PROXY_H_