1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
|
// Copyright 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CC_TREES_THREAD_PROXY_H_
#define CC_TREES_THREAD_PROXY_H_
#include <string>
#include "base/memory/scoped_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/time/time.h"
#include "cc/animation/animation_events.h"
#include "cc/base/completion_event.h"
#include "cc/base/delayed_unique_notifier.h"
#include "cc/scheduler/commit_earlyout_reason.h"
#include "cc/scheduler/scheduler.h"
#include "cc/trees/layer_tree_host_impl.h"
#include "cc/trees/proxy.h"
namespace base {
class SingleThreadTaskRunner;
}
namespace cc {
class BeginFrameSource;
class ContextProvider;
class InputHandlerClient;
class LayerTreeHost;
class Scheduler;
class ScopedThreadProxy;
class CC_EXPORT ThreadProxy : public Proxy,
NON_EXPORTED_BASE(LayerTreeHostImplClient),
NON_EXPORTED_BASE(SchedulerClient) {
public:
static scoped_ptr<Proxy> Create(
LayerTreeHost* layer_tree_host,
scoped_refptr<base::SingleThreadTaskRunner> main_task_runner,
scoped_refptr<base::SingleThreadTaskRunner> impl_task_runner,
scoped_ptr<BeginFrameSource> external_begin_frame_source);
~ThreadProxy() override;
struct BeginMainFrameAndCommitState {
BeginMainFrameAndCommitState();
~BeginMainFrameAndCommitState();
unsigned int begin_frame_id;
BeginFrameArgs begin_frame_args;
scoped_ptr<ScrollAndScaleSet> scroll_info;
size_t memory_allocation_limit_bytes;
bool evicted_ui_resources;
};
// Commits between the main and impl threads are processed through a pipeline
// with the following stages. For efficiency we can early out at any stage if
// we decide that no further processing is necessary.
enum CommitPipelineStage {
NO_PIPELINE_STAGE,
ANIMATE_PIPELINE_STAGE,
UPDATE_LAYERS_PIPELINE_STAGE,
COMMIT_PIPELINE_STAGE,
};
struct MainThreadOnly {
MainThreadOnly(ThreadProxy* proxy, int layer_tree_host_id);
~MainThreadOnly();
const int layer_tree_host_id;
// The furthest pipeline stage which has been requested for the next
// commit.
CommitPipelineStage max_requested_pipeline_stage;
// The commit pipeline stage that is currently being processed.
CommitPipelineStage current_pipeline_stage;
// The commit pipeline stage at which processing for the current commit
// will stop. Only valid while we are executing the pipeline (i.e.,
// |current_pipeline_stage| is set to a pipeline stage).
CommitPipelineStage final_pipeline_stage;
bool started;
bool prepare_tiles_pending;
bool defer_commits;
RendererCapabilities renderer_capabilities_main_thread_copy;
base::WeakPtrFactory<ThreadProxy> weak_factory;
};
// Accessed on the main thread, or when main thread is blocked.
struct MainThreadOrBlockedMainThread {
explicit MainThreadOrBlockedMainThread(LayerTreeHost* host);
~MainThreadOrBlockedMainThread();
LayerTreeHost* layer_tree_host;
bool commit_waits_for_activation;
bool main_thread_inside_commit;
};
struct CompositorThreadOnly {
CompositorThreadOnly(
ThreadProxy* proxy,
int layer_tree_host_id,
RenderingStatsInstrumentation* rendering_stats_instrumentation,
scoped_ptr<BeginFrameSource> external_begin_frame_source);
~CompositorThreadOnly();
const int layer_tree_host_id;
scoped_ptr<Scheduler> scheduler;
// Set when the main thread is waiting on a
// ScheduledActionSendBeginMainFrame to be issued.
CompletionEvent* begin_main_frame_sent_completion_event;
// Set when the main thread is waiting on a commit to complete.
CompletionEvent* commit_completion_event;
// Set when the main thread is waiting on a pending tree activation.
CompletionEvent* completion_event_for_commit_held_on_tree_activation;
// Set when the next draw should post DidCommitAndDrawFrame to the main
// thread.
bool next_frame_is_newly_committed_frame;
bool inside_draw;
bool input_throttled_until_commit;
// Whether a commit has been completed since the last time animations were
// ticked. If this happens, we need to animate again.
bool did_commit_after_animating;
DelayedUniqueNotifier smoothness_priority_expiration_notifier;
scoped_ptr<BeginFrameSource> external_begin_frame_source;
RenderingStatsInstrumentation* rendering_stats_instrumentation;
// Values used to keep track of frame durations. Used only in frame timing.
BeginFrameArgs last_begin_main_frame_args;
BeginFrameArgs last_processed_begin_main_frame_args;
scoped_ptr<LayerTreeHostImpl> layer_tree_host_impl;
base::WeakPtrFactory<ThreadProxy> weak_factory;
};
const MainThreadOnly& main() const;
const MainThreadOrBlockedMainThread& blocked_main() const;
const CompositorThreadOnly& impl() const;
// Proxy implementation
void FinishAllRendering() override;
bool IsStarted() const override;
bool CommitToActiveTree() const override;
void SetOutputSurface(OutputSurface* output_surface) override;
void SetLayerTreeHostClientReady() override;
void SetVisible(bool visible) override;
void SetThrottleFrameProduction(bool throttle) override;
const RendererCapabilities& GetRendererCapabilities() const override;
void SetNeedsAnimate() override;
void SetNeedsUpdateLayers() override;
void SetNeedsCommit() override;
void SetNeedsRedraw(const gfx::Rect& damage_rect) override;
void SetNextCommitWaitsForActivation() override;
void NotifyInputThrottledUntilCommit() override;
void SetDeferCommits(bool defer_commits) override;
bool CommitRequested() const override;
bool BeginMainFrameRequested() const override;
void MainThreadHasStoppedFlinging() override;
void Start() override;
void Stop() override;
bool SupportsImplScrolling() const override;
bool MainFrameWillHappenForTesting() override;
void SetChildrenNeedBeginFrames(bool children_need_begin_frames) override;
void SetAuthoritativeVSyncInterval(const base::TimeDelta& interval) override;
void ReleaseOutputSurface() override;
// LayerTreeHostImplClient implementation
void UpdateRendererCapabilitiesOnImplThread() override;
void DidLoseOutputSurfaceOnImplThread() override;
void CommitVSyncParameters(base::TimeTicks timebase,
base::TimeDelta interval) override;
void SetEstimatedParentDrawTime(base::TimeDelta draw_time) override;
void SetMaxSwapsPendingOnImplThread(int max) override;
void DidSwapBuffersOnImplThread() override;
void DidSwapBuffersCompleteOnImplThread() override;
void OnCanDrawStateChanged(bool can_draw) override;
void NotifyReadyToActivate() override;
void NotifyReadyToDraw() override;
// Please call these 3 functions through
// LayerTreeHostImpl's SetNeedsRedraw(), SetNeedsRedrawRect() and
// SetNeedsAnimate().
void SetNeedsRedrawOnImplThread() override;
void SetNeedsRedrawRectOnImplThread(const gfx::Rect& dirty_rect) override;
void SetNeedsAnimateOnImplThread() override;
void SetNeedsPrepareTilesOnImplThread() override;
void SetNeedsCommitOnImplThread() override;
void SetVideoNeedsBeginFrames(bool needs_begin_frames) override;
void PostAnimationEventsToMainThreadOnImplThread(
scoped_ptr<AnimationEventsVector> queue) override;
bool IsInsideDraw() override;
void RenewTreePriority() override;
void PostDelayedAnimationTaskOnImplThread(const base::Closure& task,
base::TimeDelta delay) override;
void DidActivateSyncTree() override;
void WillPrepareTiles() override;
void DidPrepareTiles() override;
void DidCompletePageScaleAnimationOnImplThread() override;
void OnDrawForOutputSurface() override;
// This should only be called by LayerTreeHostImpl::PostFrameTimingEvents.
void PostFrameTimingEventsOnImplThread(
scoped_ptr<FrameTimingTracker::CompositeTimingSet> composite_events,
scoped_ptr<FrameTimingTracker::MainFrameTimingSet> main_frame_events)
override;
// SchedulerClient implementation
void WillBeginImplFrame(const BeginFrameArgs& args) override;
void DidFinishImplFrame() override;
void ScheduledActionSendBeginMainFrame() override;
DrawResult ScheduledActionDrawAndSwapIfPossible() override;
DrawResult ScheduledActionDrawAndSwapForced() override;
void ScheduledActionAnimate() override;
void ScheduledActionCommit() override;
void ScheduledActionActivateSyncTree() override;
void ScheduledActionBeginOutputSurfaceCreation() override;
void ScheduledActionPrepareTiles() override;
void ScheduledActionInvalidateOutputSurface() override;
void SendBeginFramesToChildren(const BeginFrameArgs& args) override;
void SendBeginMainFrameNotExpectedSoon() override;
protected:
ThreadProxy(
LayerTreeHost* layer_tree_host,
scoped_refptr<base::SingleThreadTaskRunner> main_task_runner,
scoped_refptr<base::SingleThreadTaskRunner> impl_task_runner,
scoped_ptr<BeginFrameSource> external_begin_frame_source);
private:
// Called on main thread.
void SetRendererCapabilitiesMainThreadCopy(
const RendererCapabilities& capabilities);
void BeginMainFrame(
scoped_ptr<BeginMainFrameAndCommitState> begin_main_frame_state);
void BeginMainFrameNotExpectedSoon();
void DidCommitAndDrawFrame();
void DidCompleteSwapBuffers();
void SetAnimationEvents(scoped_ptr<AnimationEventsVector> queue);
void DidLoseOutputSurface();
void RequestNewOutputSurface();
void DidInitializeOutputSurface(bool success,
const RendererCapabilities& capabilities);
// Returns |true| if the request was actually sent, |false| if one was
// already outstanding.
bool SendCommitRequestToImplThreadIfNeeded(
CommitPipelineStage required_stage);
void DidCompletePageScaleAnimation();
// Called on impl thread.
struct SchedulerStateRequest;
void StartCommitOnImplThread(CompletionEvent* completion);
void BeginMainFrameAbortedOnImplThread(CommitEarlyOutReason reason);
void FinishAllRenderingOnImplThread(CompletionEvent* completion);
void InitializeImplOnImplThread(CompletionEvent* completion);
void SetLayerTreeHostClientReadyOnImplThread();
void SetVisibleOnImplThread(CompletionEvent* completion, bool visible);
void SetThrottleFrameProductionOnImplThread(bool throttle);
void HasInitializedOutputSurfaceOnImplThread(
CompletionEvent* completion,
bool* has_initialized_output_surface);
void DeleteContentsTexturesOnImplThread(CompletionEvent* completion);
void InitializeOutputSurfaceOnImplThread(OutputSurface* output_surface);
void ReleaseOutputSurfaceOnImplThread(CompletionEvent* completion);
void FinishGLOnImplThread(CompletionEvent* completion);
void LayerTreeHostClosedOnImplThread(CompletionEvent* completion);
DrawResult DrawSwapInternal(bool forced_draw);
void MainFrameWillHappenOnImplThreadForTesting(CompletionEvent* completion,
bool* main_frame_will_happen);
void SetSwapUsedIncompleteTileOnImplThread(bool used_incomplete_tile);
void MainThreadHasStoppedFlingingOnImplThread();
void SetInputThrottledUntilCommitOnImplThread(bool is_throttled);
void SetDeferCommitsOnImplThread(bool defer_commits) const;
void PostFrameTimingEvents(
scoped_ptr<FrameTimingTracker::CompositeTimingSet> composite_events,
scoped_ptr<FrameTimingTracker::MainFrameTimingSet> main_frame_events);
LayerTreeHost* layer_tree_host();
const LayerTreeHost* layer_tree_host() const;
// Use accessors instead of this variable directly.
MainThreadOnly main_thread_only_vars_unsafe_;
MainThreadOnly& main();
// Use accessors instead of this variable directly.
MainThreadOrBlockedMainThread main_thread_or_blocked_vars_unsafe_;
MainThreadOrBlockedMainThread& blocked_main();
// Use accessors instead of this variable directly.
CompositorThreadOnly compositor_thread_vars_unsafe_;
CompositorThreadOnly& impl();
base::WeakPtr<ThreadProxy> main_thread_weak_ptr_;
base::WeakPtr<ThreadProxy> impl_thread_weak_ptr_;
DISALLOW_COPY_AND_ASSIGN(ThreadProxy);
};
} // namespace cc
#endif // CC_TREES_THREAD_PROXY_H_
|