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 #include "cc/trees/thread_proxy.h"
10 #include "base/auto_reset.h"
11 #include "base/bind.h"
12 #include "base/debug/trace_event.h"
13 #include "base/debug/trace_event_synthetic_delay.h"
14 #include "base/metrics/histogram.h"
15 #include "cc/base/swap_promise.h"
16 #include "cc/debug/benchmark_instrumentation.h"
17 #include "cc/debug/devtools_instrumentation.h"
18 #include "cc/input/input_handler.h"
19 #include "cc/output/context_provider.h"
20 #include "cc/output/output_surface.h"
21 #include "cc/quads/draw_quad.h"
22 #include "cc/resources/prioritized_resource_manager.h"
23 #include "cc/scheduler/delay_based_time_source.h"
24 #include "cc/scheduler/frame_rate_controller.h"
25 #include "cc/scheduler/scheduler.h"
26 #include "cc/trees/blocking_task_runner.h"
27 #include "cc/trees/layer_tree_host.h"
28 #include "cc/trees/layer_tree_impl.h"
29 #include "ui/gfx/frame_time.h"
33 // Measured in seconds.
34 const double kSmoothnessTakesPriorityExpirationDelay
= 0.25;
36 class SwapPromiseChecker
{
38 explicit SwapPromiseChecker(cc::LayerTreeHost
* layer_tree_host
)
39 : layer_tree_host_(layer_tree_host
) {}
41 ~SwapPromiseChecker() {
42 layer_tree_host_
->BreakSwapPromises(cc::SwapPromise::COMMIT_FAILS
);
46 cc::LayerTreeHost
* layer_tree_host_
;
53 struct ThreadProxy::ReadbackRequest
{
54 CompletionEvent completion
;
60 struct ThreadProxy::CommitPendingRequest
{
61 CompletionEvent completion
;
65 struct ThreadProxy::SchedulerStateRequest
{
66 CompletionEvent completion
;
67 scoped_ptr
<base::Value
> state
;
70 scoped_ptr
<Proxy
> ThreadProxy::Create(
71 LayerTreeHost
* layer_tree_host
,
72 scoped_refptr
<base::SingleThreadTaskRunner
> impl_task_runner
) {
73 return make_scoped_ptr(new ThreadProxy(layer_tree_host
, impl_task_runner
))
77 ThreadProxy::ThreadProxy(
78 LayerTreeHost
* layer_tree_host
,
79 scoped_refptr
<base::SingleThreadTaskRunner
> impl_task_runner
)
80 : Proxy(impl_task_runner
),
81 main_thread_only_vars_unsafe_(this, layer_tree_host
->id()),
82 main_thread_or_blocked_vars_unsafe_(layer_tree_host
),
83 compositor_thread_vars_unsafe_(this, layer_tree_host
->id()) {
84 TRACE_EVENT0("cc", "ThreadProxy::ThreadProxy");
85 DCHECK(IsMainThread());
86 DCHECK(this->layer_tree_host());
89 ThreadProxy::MainThreadOnly::MainThreadOnly(ThreadProxy
* proxy
,
90 int layer_tree_host_id
)
91 : layer_tree_host_id(layer_tree_host_id
),
92 animate_requested(false),
93 commit_requested(false),
94 commit_request_sent_to_impl_thread(false),
95 created_offscreen_context_provider(false),
97 textures_acquired(true),
98 in_composite_and_readback(false),
99 manage_tiles_pending(false),
100 can_cancel_commit(true),
101 defer_commits(false),
102 weak_factory(proxy
) {}
104 ThreadProxy::MainThreadOnly::~MainThreadOnly() {}
106 ThreadProxy::MainThreadOrBlockedMainThread::MainThreadOrBlockedMainThread(
108 : layer_tree_host(host
),
109 commit_waits_for_activation(false),
110 main_thread_inside_commit(false) {}
112 ThreadProxy::MainThreadOrBlockedMainThread::~MainThreadOrBlockedMainThread() {}
114 PrioritizedResourceManager
*
115 ThreadProxy::MainThreadOrBlockedMainThread::contents_texture_manager() {
116 return layer_tree_host
->contents_texture_manager();
119 ThreadProxy::CompositorThreadOnly::CompositorThreadOnly(ThreadProxy
* proxy
,
120 int layer_tree_host_id
)
121 : layer_tree_host_id(layer_tree_host_id
),
122 contents_texture_manager(NULL
),
123 begin_main_frame_sent_completion_event(NULL
),
124 readback_request(NULL
),
125 commit_completion_event(NULL
),
126 completion_event_for_commit_held_on_tree_activation(NULL
),
127 texture_acquisition_completion_event(NULL
),
128 next_frame_is_newly_committed_frame(false),
130 input_throttled_until_commit(false),
131 animations_frozen_until_next_draw(false),
132 renew_tree_priority_pending(false),
133 weak_factory(proxy
) {}
135 ThreadProxy::CompositorThreadOnly::~CompositorThreadOnly() {}
137 ThreadProxy::~ThreadProxy() {
138 TRACE_EVENT0("cc", "ThreadProxy::~ThreadProxy");
139 DCHECK(IsMainThread());
140 DCHECK(!main().started
);
143 bool ThreadProxy::CompositeAndReadback(void* pixels
, const gfx::Rect
& rect
) {
144 TRACE_EVENT0("cc", "ThreadProxy::CompositeAndReadback");
145 DCHECK(IsMainThread());
146 DCHECK(layer_tree_host());
148 if (main().defer_commits
) {
149 TRACE_EVENT0("cc", "CompositeAndReadback_DeferCommit");
153 if (!layer_tree_host()->InitializeOutputSurfaceIfNeeded()) {
154 TRACE_EVENT_INSTANT0("cc",
155 "CompositeAndReadback_EarlyOut_LR_Uninitialized",
156 TRACE_EVENT_SCOPE_THREAD
);
160 // Perform a synchronous commit with an associated readback.
161 ReadbackRequest request
;
163 request
.pixels
= pixels
;
165 DebugScopedSetMainThreadBlocked
main_thread_blocked(this);
166 CompletionEvent begin_main_frame_sent_completion
;
167 Proxy::ImplThreadTaskRunner()->PostTask(
169 base::Bind(&ThreadProxy::ForceCommitForReadbackOnImplThread
,
170 impl_thread_weak_ptr_
,
171 &begin_main_frame_sent_completion
,
173 begin_main_frame_sent_completion
.Wait();
176 main().in_composite_and_readback
= true;
177 // This is the forced commit.
178 // Note: The Impl thread also queues a separate BeginMainFrame on the
179 // main thread, which will be called after this CompositeAndReadback
180 // completes, to replace the forced commit.
181 BeginMainFrame(scoped_ptr
<BeginMainFrameAndCommitState
>());
182 main().in_composite_and_readback
= false;
184 // Composite and readback requires a second commit to undo any changes
186 main().can_cancel_commit
= false;
188 request
.completion
.Wait();
189 return request
.success
;
192 void ThreadProxy::ForceCommitForReadbackOnImplThread(
193 CompletionEvent
* begin_main_frame_sent_completion
,
194 ReadbackRequest
* request
) {
195 TRACE_EVENT0("cc", "ThreadProxy::ForceCommitForReadbackOnImplThread");
196 DCHECK(IsImplThread());
197 DCHECK(!impl().begin_main_frame_sent_completion_event
);
198 DCHECK(!impl().readback_request
);
200 if (!impl().layer_tree_host_impl
) {
201 begin_main_frame_sent_completion
->Signal();
202 request
->success
= false;
203 request
->completion
.Signal();
207 impl().readback_request
= request
;
209 impl().scheduler
->SetNeedsForcedCommitForReadback();
210 if (impl().scheduler
->CommitPending()) {
211 begin_main_frame_sent_completion
->Signal();
215 impl().begin_main_frame_sent_completion_event
=
216 begin_main_frame_sent_completion
;
219 void ThreadProxy::FinishAllRendering() {
220 DCHECK(Proxy::IsMainThread());
221 DCHECK(!main().defer_commits
);
223 // Make sure all GL drawing is finished on the impl thread.
224 DebugScopedSetMainThreadBlocked
main_thread_blocked(this);
225 CompletionEvent completion
;
226 Proxy::ImplThreadTaskRunner()->PostTask(
228 base::Bind(&ThreadProxy::FinishAllRenderingOnImplThread
,
229 impl_thread_weak_ptr_
,
234 bool ThreadProxy::IsStarted() const {
235 DCHECK(Proxy::IsMainThread());
236 return main().started
;
239 void ThreadProxy::SetLayerTreeHostClientReady() {
240 TRACE_EVENT0("cc", "ThreadProxy::SetLayerTreeHostClientReady");
241 Proxy::ImplThreadTaskRunner()->PostTask(
243 base::Bind(&ThreadProxy::SetLayerTreeHostClientReadyOnImplThread
,
244 impl_thread_weak_ptr_
));
247 void ThreadProxy::SetLayerTreeHostClientReadyOnImplThread() {
248 TRACE_EVENT0("cc", "ThreadProxy::SetLayerTreeHostClientReadyOnImplThread");
249 impl().scheduler
->SetCanStart();
252 void ThreadProxy::SetVisible(bool visible
) {
253 TRACE_EVENT0("cc", "ThreadProxy::SetVisible");
254 DebugScopedSetMainThreadBlocked
main_thread_blocked(this);
256 CompletionEvent completion
;
257 Proxy::ImplThreadTaskRunner()->PostTask(
259 base::Bind(&ThreadProxy::SetVisibleOnImplThread
,
260 impl_thread_weak_ptr_
,
266 void ThreadProxy::SetVisibleOnImplThread(CompletionEvent
* completion
,
268 TRACE_EVENT0("cc", "ThreadProxy::SetVisibleOnImplThread");
269 impl().layer_tree_host_impl
->SetVisible(visible
);
270 impl().scheduler
->SetVisible(visible
);
271 UpdateBackgroundAnimateTicking();
272 completion
->Signal();
275 void ThreadProxy::UpdateBackgroundAnimateTicking() {
276 bool should_background_tick
=
277 !impl().scheduler
->WillDrawIfNeeded() &&
278 impl().layer_tree_host_impl
->active_tree()->root_layer();
279 impl().layer_tree_host_impl
->UpdateBackgroundAnimateTicking(
280 should_background_tick
);
281 if (should_background_tick
)
282 impl().animations_frozen_until_next_draw
= false;
285 void ThreadProxy::DoCreateAndInitializeOutputSurface() {
286 TRACE_EVENT0("cc", "ThreadProxy::DoCreateAndInitializeOutputSurface");
287 DCHECK(IsMainThread());
289 scoped_ptr
<OutputSurface
> output_surface
=
290 layer_tree_host()->CreateOutputSurface();
292 RendererCapabilities capabilities
;
293 bool success
= !!output_surface
;
295 OnOutputSurfaceInitializeAttempted(false, capabilities
);
299 scoped_refptr
<ContextProvider
> offscreen_context_provider
;
300 if (main().created_offscreen_context_provider
) {
301 offscreen_context_provider
=
302 layer_tree_host()->client()->OffscreenContextProvider();
303 success
= !!offscreen_context_provider
.get();
305 OnOutputSurfaceInitializeAttempted(false, capabilities
);
312 // Make a blocking call to InitializeOutputSurfaceOnImplThread. The results
313 // of that call are pushed into the success and capabilities local
315 CompletionEvent completion
;
316 DebugScopedSetMainThreadBlocked
main_thread_blocked(this);
318 Proxy::ImplThreadTaskRunner()->PostTask(
320 base::Bind(&ThreadProxy::InitializeOutputSurfaceOnImplThread
,
321 impl_thread_weak_ptr_
,
323 base::Passed(&output_surface
),
324 offscreen_context_provider
,
330 OnOutputSurfaceInitializeAttempted(success
, capabilities
);
333 void ThreadProxy::SetRendererCapabilitiesMainThreadCopy(
334 const RendererCapabilities
& capabilities
) {
335 main().renderer_capabilities_main_thread_copy
= capabilities
;
338 void ThreadProxy::OnOutputSurfaceInitializeAttempted(
340 const RendererCapabilities
& capabilities
) {
341 DCHECK(IsMainThread());
342 DCHECK(layer_tree_host());
345 main().renderer_capabilities_main_thread_copy
= capabilities
;
348 LayerTreeHost::CreateResult result
=
349 layer_tree_host()->OnCreateAndInitializeOutputSurfaceAttempted(success
);
350 if (result
== LayerTreeHost::CreateFailedButTryAgain
) {
351 if (!main().output_surface_creation_callback
.callback().is_null()) {
352 Proxy::MainThreadTaskRunner()->PostTask(
353 FROM_HERE
, main().output_surface_creation_callback
.callback());
356 main().output_surface_creation_callback
.Cancel();
360 void ThreadProxy::SendCommitRequestToImplThreadIfNeeded() {
361 DCHECK(IsMainThread());
362 if (main().commit_request_sent_to_impl_thread
)
364 main().commit_request_sent_to_impl_thread
= true;
365 Proxy::ImplThreadTaskRunner()->PostTask(
367 base::Bind(&ThreadProxy::SetNeedsCommitOnImplThread
,
368 impl_thread_weak_ptr_
));
371 const RendererCapabilities
& ThreadProxy::GetRendererCapabilities() const {
372 DCHECK(IsMainThread());
373 DCHECK(!layer_tree_host()->output_surface_lost());
374 return main().renderer_capabilities_main_thread_copy
;
377 void ThreadProxy::SetNeedsAnimate() {
378 DCHECK(IsMainThread());
379 if (main().animate_requested
)
382 TRACE_EVENT0("cc", "ThreadProxy::SetNeedsAnimate");
383 main().animate_requested
= true;
384 main().can_cancel_commit
= false;
385 SendCommitRequestToImplThreadIfNeeded();
388 void ThreadProxy::SetNeedsUpdateLayers() {
389 DCHECK(IsMainThread());
391 if (main().commit_request_sent_to_impl_thread
)
393 TRACE_EVENT0("cc", "ThreadProxy::SetNeedsUpdateLayers");
395 SendCommitRequestToImplThreadIfNeeded();
398 void ThreadProxy::SetNeedsCommit() {
399 DCHECK(IsMainThread());
400 // Unconditionally set here to handle SetNeedsCommit calls during a commit.
401 main().can_cancel_commit
= false;
403 if (main().commit_requested
)
405 TRACE_EVENT0("cc", "ThreadProxy::SetNeedsCommit");
406 main().commit_requested
= true;
408 SendCommitRequestToImplThreadIfNeeded();
411 void ThreadProxy::UpdateRendererCapabilitiesOnImplThread() {
412 DCHECK(IsImplThread());
413 Proxy::MainThreadTaskRunner()->PostTask(
415 base::Bind(&ThreadProxy::SetRendererCapabilitiesMainThreadCopy
,
416 main_thread_weak_ptr_
,
418 .layer_tree_host_impl
->GetRendererCapabilities()
419 .MainThreadCapabilities()));
422 void ThreadProxy::DidLoseOutputSurfaceOnImplThread() {
423 TRACE_EVENT0("cc", "ThreadProxy::DidLoseOutputSurfaceOnImplThread");
424 DCHECK(IsImplThread());
425 CheckOutputSurfaceStatusOnImplThread();
428 void ThreadProxy::CheckOutputSurfaceStatusOnImplThread() {
429 TRACE_EVENT0("cc", "ThreadProxy::CheckOutputSurfaceStatusOnImplThread");
430 DCHECK(IsImplThread());
431 if (!impl().layer_tree_host_impl
->IsContextLost())
433 if (ContextProvider
* offscreen_contexts
=
434 impl().layer_tree_host_impl
->offscreen_context_provider())
435 offscreen_contexts
->VerifyContexts();
436 impl().scheduler
->DidLoseOutputSurface();
439 void ThreadProxy::OnSwapBuffersCompleteOnImplThread() {
440 TRACE_EVENT0("cc", "ThreadProxy::OnSwapBuffersCompleteOnImplThread");
441 DCHECK(IsImplThread());
442 Proxy::MainThreadTaskRunner()->PostTask(
444 base::Bind(&ThreadProxy::DidCompleteSwapBuffers
, main_thread_weak_ptr_
));
447 void ThreadProxy::SetNeedsBeginImplFrame(bool enable
) {
448 TRACE_EVENT1("cc", "ThreadProxy::SetNeedsBeginImplFrame", "enable", enable
);
449 DCHECK(IsImplThread());
450 impl().layer_tree_host_impl
->SetNeedsBeginImplFrame(enable
);
451 UpdateBackgroundAnimateTicking();
454 void ThreadProxy::BeginImplFrame(const BeginFrameArgs
& args
) {
455 TRACE_EVENT0("cc", "ThreadProxy::BeginImplFrame");
456 DCHECK(IsImplThread());
458 // Sample the frame time now. This time will be used for updating animations
460 impl().layer_tree_host_impl
->CurrentFrameTimeTicks();
462 impl().scheduler
->BeginImplFrame(args
);
465 void ThreadProxy::OnCanDrawStateChanged(bool can_draw
) {
467 "cc", "ThreadProxy::OnCanDrawStateChanged", "can_draw", can_draw
);
468 DCHECK(IsImplThread());
469 impl().scheduler
->SetCanDraw(can_draw
);
470 UpdateBackgroundAnimateTicking();
473 void ThreadProxy::NotifyReadyToActivate() {
474 TRACE_EVENT0("cc", "ThreadProxy::NotifyReadyToActivate");
475 impl().scheduler
->NotifyReadyToActivate();
478 void ThreadProxy::SetNeedsCommitOnImplThread() {
479 TRACE_EVENT0("cc", "ThreadProxy::SetNeedsCommitOnImplThread");
480 DCHECK(IsImplThread());
481 impl().scheduler
->SetNeedsCommit();
484 void ThreadProxy::PostAnimationEventsToMainThreadOnImplThread(
485 scoped_ptr
<AnimationEventsVector
> events
,
486 base::Time wall_clock_time
) {
488 "ThreadProxy::PostAnimationEventsToMainThreadOnImplThread");
489 DCHECK(IsImplThread());
490 Proxy::MainThreadTaskRunner()->PostTask(
492 base::Bind(&ThreadProxy::SetAnimationEvents
,
493 main_thread_weak_ptr_
,
494 base::Passed(&events
),
498 bool ThreadProxy::ReduceContentsTextureMemoryOnImplThread(size_t limit_bytes
,
499 int priority_cutoff
) {
500 DCHECK(IsImplThread());
502 if (!impl().contents_texture_manager
)
504 if (!impl().layer_tree_host_impl
->resource_provider())
508 impl().contents_texture_manager
->ReduceMemoryOnImplThread(
511 impl().layer_tree_host_impl
->resource_provider());
515 // The texture upload queue may reference textures that were just purged,
516 // clear them from the queue.
517 if (impl().current_resource_update_controller
) {
519 .current_resource_update_controller
->DiscardUploadsToEvictedResources();
524 void ThreadProxy::SendManagedMemoryStats() {
525 DCHECK(IsImplThread());
526 if (!impl().layer_tree_host_impl
)
528 if (!impl().contents_texture_manager
)
531 // If we are using impl-side painting, then SendManagedMemoryStats is called
532 // directly after the tile manager's manage function, and doesn't need to
533 // interact with main thread's layer tree.
534 if (impl().layer_tree_host_impl
->settings().impl_side_painting
)
537 impl().layer_tree_host_impl
->SendManagedMemoryStats(
538 impl().contents_texture_manager
->MemoryVisibleBytes(),
539 impl().contents_texture_manager
->MemoryVisibleAndNearbyBytes(),
540 impl().contents_texture_manager
->MemoryUseBytes());
543 bool ThreadProxy::IsInsideDraw() { return impl().inside_draw
; }
545 void ThreadProxy::SetNeedsRedraw(const gfx::Rect
& damage_rect
) {
546 TRACE_EVENT0("cc", "ThreadProxy::SetNeedsRedraw");
547 DCHECK(IsMainThread());
548 Proxy::ImplThreadTaskRunner()->PostTask(
550 base::Bind(&ThreadProxy::SetNeedsRedrawRectOnImplThread
,
551 impl_thread_weak_ptr_
,
555 void ThreadProxy::SetNextCommitWaitsForActivation() {
556 DCHECK(IsMainThread());
557 DCHECK(!blocked_main().main_thread_inside_commit
);
558 blocked_main().commit_waits_for_activation
= true;
561 void ThreadProxy::SetDeferCommits(bool defer_commits
) {
562 DCHECK(IsMainThread());
563 DCHECK_NE(main().defer_commits
, defer_commits
);
564 main().defer_commits
= defer_commits
;
566 if (main().defer_commits
)
567 TRACE_EVENT_ASYNC_BEGIN0("cc", "ThreadProxy::SetDeferCommits", this);
569 TRACE_EVENT_ASYNC_END0("cc", "ThreadProxy::SetDeferCommits", this);
571 if (!main().defer_commits
&& main().pending_deferred_commit
)
572 Proxy::MainThreadTaskRunner()->PostTask(
574 base::Bind(&ThreadProxy::BeginMainFrame
,
575 main_thread_weak_ptr_
,
576 base::Passed(&main().pending_deferred_commit
)));
579 bool ThreadProxy::CommitRequested() const {
580 DCHECK(IsMainThread());
581 return main().commit_requested
;
584 bool ThreadProxy::BeginMainFrameRequested() const {
585 DCHECK(IsMainThread());
586 return main().commit_request_sent_to_impl_thread
;
589 void ThreadProxy::SetNeedsRedrawOnImplThread() {
590 TRACE_EVENT0("cc", "ThreadProxy::SetNeedsRedrawOnImplThread");
591 DCHECK(IsImplThread());
592 impl().scheduler
->SetNeedsRedraw();
595 void ThreadProxy::SetNeedsManageTilesOnImplThread() {
596 DCHECK(IsImplThread());
597 impl().scheduler
->SetNeedsManageTiles();
600 void ThreadProxy::SetNeedsRedrawRectOnImplThread(const gfx::Rect
& damage_rect
) {
601 DCHECK(IsImplThread());
602 impl().layer_tree_host_impl
->SetViewportDamage(damage_rect
);
603 SetNeedsRedrawOnImplThread();
606 void ThreadProxy::SetSwapUsedIncompleteTileOnImplThread(
607 bool used_incomplete_tile
) {
608 DCHECK(IsImplThread());
609 if (used_incomplete_tile
) {
610 TRACE_EVENT_INSTANT0("cc",
611 "ThreadProxy::SetSwapUsedIncompleteTileOnImplThread",
612 TRACE_EVENT_SCOPE_THREAD
);
614 impl().scheduler
->SetSwapUsedIncompleteTile(used_incomplete_tile
);
617 void ThreadProxy::DidInitializeVisibleTileOnImplThread() {
618 TRACE_EVENT0("cc", "ThreadProxy::DidInitializeVisibleTileOnImplThread");
619 DCHECK(IsImplThread());
620 impl().scheduler
->SetNeedsRedraw();
623 void ThreadProxy::MainThreadHasStoppedFlinging() {
624 DCHECK(IsMainThread());
625 Proxy::ImplThreadTaskRunner()->PostTask(
627 base::Bind(&ThreadProxy::MainThreadHasStoppedFlingingOnImplThread
,
628 impl_thread_weak_ptr_
));
631 void ThreadProxy::MainThreadHasStoppedFlingingOnImplThread() {
632 DCHECK(IsImplThread());
633 impl().layer_tree_host_impl
->MainThreadHasStoppedFlinging();
636 void ThreadProxy::NotifyInputThrottledUntilCommit() {
637 DCHECK(IsMainThread());
638 Proxy::ImplThreadTaskRunner()->PostTask(
640 base::Bind(&ThreadProxy::SetInputThrottledUntilCommitOnImplThread
,
641 impl_thread_weak_ptr_
,
645 void ThreadProxy::SetInputThrottledUntilCommitOnImplThread(bool is_throttled
) {
646 DCHECK(IsImplThread());
647 if (is_throttled
== impl().input_throttled_until_commit
)
649 impl().input_throttled_until_commit
= is_throttled
;
653 LayerTreeHost
* ThreadProxy::layer_tree_host() {
654 return blocked_main().layer_tree_host
;
657 const LayerTreeHost
* ThreadProxy::layer_tree_host() const {
658 return blocked_main().layer_tree_host
;
661 ThreadProxy::MainThreadOnly
& ThreadProxy::main() {
662 DCHECK(IsMainThread());
663 return main_thread_only_vars_unsafe_
;
665 const ThreadProxy::MainThreadOnly
& ThreadProxy::main() const {
666 DCHECK(IsMainThread());
667 return main_thread_only_vars_unsafe_
;
670 ThreadProxy::MainThreadOrBlockedMainThread
& ThreadProxy::blocked_main() {
671 DCHECK(IsMainThread() || IsMainThreadBlocked());
672 return main_thread_or_blocked_vars_unsafe_
;
675 const ThreadProxy::MainThreadOrBlockedMainThread
& ThreadProxy::blocked_main()
677 DCHECK(IsMainThread() || IsMainThreadBlocked());
678 return main_thread_or_blocked_vars_unsafe_
;
681 ThreadProxy::CompositorThreadOnly
& ThreadProxy::impl() {
682 DCHECK(IsImplThread());
683 return compositor_thread_vars_unsafe_
;
686 const ThreadProxy::CompositorThreadOnly
& ThreadProxy::impl() const {
687 DCHECK(IsImplThread());
688 return compositor_thread_vars_unsafe_
;
691 void ThreadProxy::Start() {
692 DCHECK(IsMainThread());
693 DCHECK(Proxy::HasImplThread());
695 // Create LayerTreeHostImpl.
696 DebugScopedSetMainThreadBlocked
main_thread_blocked(this);
697 CompletionEvent completion
;
698 Proxy::ImplThreadTaskRunner()->PostTask(
700 base::Bind(&ThreadProxy::InitializeImplOnImplThread
,
701 base::Unretained(this),
705 main_thread_weak_ptr_
= main().weak_factory
.GetWeakPtr();
707 main().started
= true;
710 void ThreadProxy::Stop() {
711 TRACE_EVENT0("cc", "ThreadProxy::Stop");
712 DCHECK(IsMainThread());
713 DCHECK(main().started
);
715 // Synchronously finishes pending GL operations and deletes the impl.
716 // The two steps are done as separate post tasks, so that tasks posted
717 // by the GL implementation due to the Finish can be executed by the
718 // renderer before shutting it down.
720 DebugScopedSetMainThreadBlocked
main_thread_blocked(this);
722 CompletionEvent completion
;
723 Proxy::ImplThreadTaskRunner()->PostTask(
725 base::Bind(&ThreadProxy::FinishGLOnImplThread
,
726 impl_thread_weak_ptr_
,
731 DebugScopedSetMainThreadBlocked
main_thread_blocked(this);
733 CompletionEvent completion
;
734 Proxy::ImplThreadTaskRunner()->PostTask(
736 base::Bind(&ThreadProxy::LayerTreeHostClosedOnImplThread
,
737 impl_thread_weak_ptr_
,
742 main().weak_factory
.InvalidateWeakPtrs();
743 blocked_main().layer_tree_host
= NULL
;
744 main().started
= false;
747 void ThreadProxy::ForceSerializeOnSwapBuffers() {
748 DebugScopedSetMainThreadBlocked
main_thread_blocked(this);
749 CompletionEvent completion
;
750 Proxy::ImplThreadTaskRunner()->PostTask(
752 base::Bind(&ThreadProxy::ForceSerializeOnSwapBuffersOnImplThread
,
753 impl_thread_weak_ptr_
,
758 void ThreadProxy::ForceSerializeOnSwapBuffersOnImplThread(
759 CompletionEvent
* completion
) {
760 if (impl().layer_tree_host_impl
->renderer())
761 impl().layer_tree_host_impl
->renderer()->DoNoOp();
762 completion
->Signal();
765 void ThreadProxy::FinishAllRenderingOnImplThread(CompletionEvent
* completion
) {
766 TRACE_EVENT0("cc", "ThreadProxy::FinishAllRenderingOnImplThread");
767 DCHECK(IsImplThread());
768 impl().layer_tree_host_impl
->FinishAllRendering();
769 completion
->Signal();
772 void ThreadProxy::ScheduledActionSendBeginMainFrame() {
773 TRACE_EVENT0("cc", "ThreadProxy::ScheduledActionSendBeginMainFrame");
774 scoped_ptr
<BeginMainFrameAndCommitState
> begin_main_frame_state(
775 new BeginMainFrameAndCommitState
);
776 begin_main_frame_state
->monotonic_frame_begin_time
=
777 impl().layer_tree_host_impl
->CurrentPhysicalTimeTicks();
778 begin_main_frame_state
->scroll_info
=
779 impl().layer_tree_host_impl
->ProcessScrollDeltas();
781 if (!impl().layer_tree_host_impl
->settings().impl_side_painting
) {
782 DCHECK_GT(impl().layer_tree_host_impl
->memory_allocation_limit_bytes(), 0u);
784 begin_main_frame_state
->memory_allocation_limit_bytes
=
785 impl().layer_tree_host_impl
->memory_allocation_limit_bytes();
786 begin_main_frame_state
->memory_allocation_priority_cutoff
=
787 impl().layer_tree_host_impl
->memory_allocation_priority_cutoff();
788 begin_main_frame_state
->evicted_ui_resources
=
789 impl().layer_tree_host_impl
->EvictedUIResourcesExist();
790 Proxy::MainThreadTaskRunner()->PostTask(
792 base::Bind(&ThreadProxy::BeginMainFrame
,
793 main_thread_weak_ptr_
,
794 base::Passed(&begin_main_frame_state
)));
795 devtools_instrumentation::DidRequestMainThreadFrame(
796 impl().layer_tree_host_id
);
797 if (impl().begin_main_frame_sent_completion_event
) {
798 impl().begin_main_frame_sent_completion_event
->Signal();
799 impl().begin_main_frame_sent_completion_event
= NULL
;
801 impl().timing_history
.DidBeginMainFrame();
804 void ThreadProxy::BeginMainFrame(
805 scoped_ptr
<BeginMainFrameAndCommitState
> begin_main_frame_state
) {
806 TRACE_EVENT0("cc", "ThreadProxy::BeginMainFrame");
807 TRACE_EVENT_SYNTHETIC_DELAY_BEGIN("cc.BeginMainFrame");
808 DCHECK(IsMainThread());
810 if (!layer_tree_host())
813 if (main().defer_commits
) {
814 main().pending_deferred_commit
= begin_main_frame_state
.Pass();
815 layer_tree_host()->DidDeferCommit();
816 TRACE_EVENT_INSTANT0(
817 "cc", "EarlyOut_DeferCommits", TRACE_EVENT_SCOPE_THREAD
);
821 // If the commit finishes, LayerTreeHost will transfer its swap promises to
822 // LayerTreeImpl. The destructor of SwapPromiseChecker checks LayerTressHost's
824 SwapPromiseChecker
swap_promise_checker(layer_tree_host());
826 // Do not notify the impl thread of commit requests that occur during
827 // the apply/animate/layout part of the BeginMainFrameAndCommit process since
828 // those commit requests will get painted immediately. Once we have done
829 // the paint, main().commit_requested will be set to false to allow new commit
830 // requests to be scheduled.
831 main().commit_requested
= true;
832 main().commit_request_sent_to_impl_thread
= true;
834 // On the other hand, the AnimationRequested flag needs to be cleared
835 // here so that any animation requests generated by the apply or animate
836 // callbacks will trigger another frame.
837 main().animate_requested
= false;
839 if (!main().in_composite_and_readback
&& !layer_tree_host()->visible()) {
840 main().commit_requested
= false;
841 main().commit_request_sent_to_impl_thread
= false;
843 TRACE_EVENT_INSTANT0("cc", "EarlyOut_NotVisible", TRACE_EVENT_SCOPE_THREAD
);
844 bool did_handle
= false;
845 Proxy::ImplThreadTaskRunner()->PostTask(
847 base::Bind(&ThreadProxy::BeginMainFrameAbortedOnImplThread
,
848 impl_thread_weak_ptr_
,
853 if (begin_main_frame_state
) {
854 layer_tree_host()->ApplyScrollAndScale(
855 *begin_main_frame_state
->scroll_info
);
858 layer_tree_host()->WillBeginMainFrame();
860 if (begin_main_frame_state
) {
861 layer_tree_host()->UpdateClientAnimations(
862 begin_main_frame_state
->monotonic_frame_begin_time
);
863 layer_tree_host()->AnimateLayers(
864 begin_main_frame_state
->monotonic_frame_begin_time
);
865 blocked_main().last_monotonic_frame_begin_time
=
866 begin_main_frame_state
->monotonic_frame_begin_time
;
869 // Unlink any backings that the impl thread has evicted, so that we know to
870 // re-paint them in UpdateLayers.
871 if (blocked_main().contents_texture_manager()) {
872 blocked_main().contents_texture_manager()->UnlinkAndClearEvictedBackings();
874 if (begin_main_frame_state
) {
875 blocked_main().contents_texture_manager()->SetMaxMemoryLimitBytes(
876 begin_main_frame_state
->memory_allocation_limit_bytes
);
877 blocked_main().contents_texture_manager()->SetExternalPriorityCutoff(
878 begin_main_frame_state
->memory_allocation_priority_cutoff
);
882 // Recreate all UI resources if there were evicted UI resources when the impl
883 // thread initiated the commit.
884 bool evicted_ui_resources
= begin_main_frame_state
885 ? begin_main_frame_state
->evicted_ui_resources
887 if (evicted_ui_resources
)
888 layer_tree_host()->RecreateUIResources();
890 layer_tree_host()->Layout();
891 TRACE_EVENT_SYNTHETIC_DELAY_END("cc.BeginMainFrame");
893 // Clear the commit flag after updating animations and layout here --- objects
894 // that only layout when painted will trigger another SetNeedsCommit inside
896 main().commit_requested
= false;
897 main().commit_request_sent_to_impl_thread
= false;
898 bool can_cancel_this_commit
= main().can_cancel_commit
&&
899 !main().in_composite_and_readback
&&
900 !evicted_ui_resources
;
901 main().can_cancel_commit
= true;
903 scoped_ptr
<ResourceUpdateQueue
> queue
=
904 make_scoped_ptr(new ResourceUpdateQueue
);
906 bool updated
= layer_tree_host()->UpdateLayers(queue
.get());
908 // Once single buffered layers are committed, they cannot be modified until
909 // they are drawn by the impl thread.
910 main().textures_acquired
= false;
912 layer_tree_host()->WillCommit();
914 if (!updated
&& can_cancel_this_commit
) {
915 TRACE_EVENT_INSTANT0("cc", "EarlyOut_NoUpdates", TRACE_EVENT_SCOPE_THREAD
);
916 bool did_handle
= true;
917 Proxy::ImplThreadTaskRunner()->PostTask(
919 base::Bind(&ThreadProxy::BeginMainFrameAbortedOnImplThread
,
920 impl_thread_weak_ptr_
,
923 // Although the commit is internally aborted, this is because it has been
924 // detected to be a no-op. From the perspective of an embedder, this commit
925 // went through, and input should no longer be throttled, etc.
926 layer_tree_host()->CommitComplete();
927 layer_tree_host()->DidBeginMainFrame();
931 // Before calling animate, we set main().animate_requested to false. If it is
933 // now, it means SetNeedAnimate was called again, but during a state when
934 // main().commit_request_sent_to_impl_thread = true. We need to force that
936 // happen again now so that the commit request is sent to the impl thread.
937 if (main().animate_requested
) {
938 // Forces SetNeedsAnimate to consider posting a commit task.
939 main().animate_requested
= false;
943 scoped_refptr
<ContextProvider
> offscreen_context_provider
;
944 if (main().renderer_capabilities_main_thread_copy
.using_offscreen_context3d
&&
945 layer_tree_host()->needs_offscreen_context()) {
946 offscreen_context_provider
=
947 layer_tree_host()->client()->OffscreenContextProvider();
948 if (offscreen_context_provider
.get())
949 main().created_offscreen_context_provider
= true;
952 // Notify the impl thread that the main thread is ready to commit. This will
953 // begin the commit process, which is blocking from the main thread's
954 // point of view, but asynchronously performed on the impl thread,
955 // coordinated by the Scheduler.
957 TRACE_EVENT0("cc", "ThreadProxy::BeginMainFrame::commit");
959 DebugScopedSetMainThreadBlocked
main_thread_blocked(this);
961 // This CapturePostTasks should be destroyed before CommitComplete() is
962 // called since that goes out to the embedder, and we want the embedder
963 // to receive its callbacks before that.
964 BlockingTaskRunner::CapturePostTasks blocked
;
966 CompletionEvent completion
;
967 Proxy::ImplThreadTaskRunner()->PostTask(
969 base::Bind(&ThreadProxy::StartCommitOnImplThread
,
970 impl_thread_weak_ptr_
,
973 offscreen_context_provider
));
976 RenderingStatsInstrumentation
* stats_instrumentation
=
977 layer_tree_host()->rendering_stats_instrumentation();
978 BenchmarkInstrumentation::IssueMainThreadRenderingStatsEvent(
979 stats_instrumentation
->main_thread_rendering_stats());
980 stats_instrumentation
->AccumulateAndClearMainThreadStats();
983 layer_tree_host()->CommitComplete();
984 layer_tree_host()->DidBeginMainFrame();
987 void ThreadProxy::StartCommitOnImplThread(
988 CompletionEvent
* completion
,
989 ResourceUpdateQueue
* raw_queue
,
990 scoped_refptr
<ContextProvider
> offscreen_context_provider
) {
991 scoped_ptr
<ResourceUpdateQueue
> queue(raw_queue
);
993 TRACE_EVENT0("cc", "ThreadProxy::StartCommitOnImplThread");
994 DCHECK(!impl().commit_completion_event
);
995 DCHECK(IsImplThread() && IsMainThreadBlocked());
996 DCHECK(impl().scheduler
);
997 DCHECK(impl().scheduler
->CommitPending());
999 if (!impl().layer_tree_host_impl
) {
1000 TRACE_EVENT_INSTANT0(
1001 "cc", "EarlyOut_NoLayerTree", TRACE_EVENT_SCOPE_THREAD
);
1002 completion
->Signal();
1006 if (offscreen_context_provider
.get())
1007 offscreen_context_provider
->BindToCurrentThread();
1008 impl().layer_tree_host_impl
->SetOffscreenContextProvider(
1009 offscreen_context_provider
);
1011 if (impl().contents_texture_manager
) {
1012 DCHECK_EQ(impl().contents_texture_manager
,
1013 blocked_main().contents_texture_manager());
1015 // Cache this pointer that was created on the main thread side to avoid a
1016 // data race between creating it and using it on the compositor thread.
1017 impl().contents_texture_manager
= blocked_main().contents_texture_manager();
1020 if (impl().contents_texture_manager
) {
1021 if (impl().contents_texture_manager
->LinkedEvictedBackingsExist()) {
1022 // Clear any uploads we were making to textures linked to evicted
1024 queue
->ClearUploadsToEvictedResources();
1025 // Some textures in the layer tree are invalid. Kick off another commit
1026 // to fill them again.
1027 SetNeedsCommitOnImplThread();
1030 impl().contents_texture_manager
->PushTexturePrioritiesToBackings();
1033 impl().commit_completion_event
= completion
;
1034 impl().current_resource_update_controller
= ResourceUpdateController::Create(
1036 Proxy::ImplThreadTaskRunner(),
1038 impl().layer_tree_host_impl
->resource_provider());
1039 impl().current_resource_update_controller
->PerformMoreUpdates(
1040 impl().scheduler
->AnticipatedDrawTime());
1043 void ThreadProxy::BeginMainFrameAbortedOnImplThread(bool did_handle
) {
1044 TRACE_EVENT0("cc", "ThreadProxy::BeginMainFrameAbortedOnImplThread");
1045 DCHECK(IsImplThread());
1046 DCHECK(impl().scheduler
);
1047 DCHECK(impl().scheduler
->CommitPending());
1048 DCHECK(!impl().layer_tree_host_impl
->pending_tree());
1051 SetInputThrottledUntilCommitOnImplThread(false);
1052 impl().layer_tree_host_impl
->BeginMainFrameAborted(did_handle
);
1053 impl().scheduler
->BeginMainFrameAborted(did_handle
);
1056 void ThreadProxy::ScheduledActionCommit() {
1057 TRACE_EVENT0("cc", "ThreadProxy::ScheduledActionCommit");
1058 DCHECK(IsImplThread());
1059 DCHECK(IsMainThreadBlocked());
1060 DCHECK(impl().commit_completion_event
);
1061 DCHECK(impl().current_resource_update_controller
);
1063 // Complete all remaining texture updates.
1064 impl().current_resource_update_controller
->Finalize();
1065 impl().current_resource_update_controller
.reset();
1067 if (impl().animations_frozen_until_next_draw
) {
1068 impl().animation_freeze_time
=
1069 std::max(impl().animation_freeze_time
,
1070 blocked_main().last_monotonic_frame_begin_time
);
1073 blocked_main().main_thread_inside_commit
= true;
1074 impl().layer_tree_host_impl
->BeginCommit();
1075 layer_tree_host()->BeginCommitOnImplThread(impl().layer_tree_host_impl
.get());
1076 layer_tree_host()->FinishCommitOnImplThread(
1077 impl().layer_tree_host_impl
.get());
1078 blocked_main().main_thread_inside_commit
= false;
1080 bool hold_commit
= layer_tree_host()->settings().impl_side_painting
&&
1081 blocked_main().commit_waits_for_activation
;
1082 blocked_main().commit_waits_for_activation
= false;
1085 // For some layer types in impl-side painting, the commit is held until
1086 // the pending tree is activated. It's also possible that the
1087 // pending tree has already activated if there was no work to be done.
1088 TRACE_EVENT_INSTANT0("cc", "HoldCommit", TRACE_EVENT_SCOPE_THREAD
);
1089 impl().completion_event_for_commit_held_on_tree_activation
=
1090 impl().commit_completion_event
;
1091 impl().commit_completion_event
= NULL
;
1093 impl().commit_completion_event
->Signal();
1094 impl().commit_completion_event
= NULL
;
1097 // Delay this step until afer the main thread has been released as it's
1098 // often a good bit of work to update the tree and prepare the new frame.
1099 impl().layer_tree_host_impl
->CommitComplete();
1101 SetInputThrottledUntilCommitOnImplThread(false);
1103 UpdateBackgroundAnimateTicking();
1105 impl().next_frame_is_newly_committed_frame
= true;
1107 impl().timing_history
.DidCommit();
1109 // SetVisible kicks off the next scheduler action, so this must be last.
1110 impl().scheduler
->SetVisible(impl().layer_tree_host_impl
->visible());
1113 void ThreadProxy::ScheduledActionUpdateVisibleTiles() {
1114 TRACE_EVENT0("cc", "ThreadProxy::ScheduledActionUpdateVisibleTiles");
1115 DCHECK(IsImplThread());
1116 impl().layer_tree_host_impl
->UpdateVisibleTiles();
1119 void ThreadProxy::ScheduledActionActivatePendingTree() {
1120 TRACE_EVENT0("cc", "ThreadProxy::ScheduledActionActivatePendingTree");
1121 DCHECK(IsImplThread());
1122 impl().layer_tree_host_impl
->ActivatePendingTree();
1125 void ThreadProxy::ScheduledActionBeginOutputSurfaceCreation() {
1126 TRACE_EVENT0("cc", "ThreadProxy::ScheduledActionBeginOutputSurfaceCreation");
1127 DCHECK(IsImplThread());
1128 Proxy::MainThreadTaskRunner()->PostTask(
1130 base::Bind(&ThreadProxy::CreateAndInitializeOutputSurface
,
1131 main_thread_weak_ptr_
));
1134 DrawSwapReadbackResult
ThreadProxy::DrawSwapReadbackInternal(
1136 bool swap_requested
,
1137 bool readback_requested
) {
1138 TRACE_EVENT_SYNTHETIC_DELAY("cc.DrawAndSwap");
1139 DrawSwapReadbackResult result
;
1141 DCHECK(IsImplThread());
1142 DCHECK(impl().layer_tree_host_impl
.get());
1144 impl().timing_history
.DidStartDrawing();
1145 base::TimeDelta draw_duration_estimate
= DrawDurationEstimate();
1146 base::AutoReset
<bool> mark_inside(&impl().inside_draw
, true);
1148 // Advance our animations.
1149 base::TimeTicks monotonic_time
;
1150 if (impl().animations_frozen_until_next_draw
)
1151 monotonic_time
= impl().animation_freeze_time
;
1153 monotonic_time
= impl().layer_tree_host_impl
->CurrentFrameTimeTicks();
1155 // TODO(ajuma): Remove wall_clock_time once the legacy implementation of
1156 // animations in Blink is removed.
1157 base::Time wall_clock_time
= impl().layer_tree_host_impl
->CurrentFrameTime();
1159 // TODO(enne): This should probably happen post-animate.
1160 if (impl().layer_tree_host_impl
->pending_tree())
1161 impl().layer_tree_host_impl
->pending_tree()->UpdateDrawProperties();
1162 impl().layer_tree_host_impl
->Animate(monotonic_time
, wall_clock_time
);
1164 // This method is called on a forced draw, regardless of whether we are able
1165 // to produce a frame, as the calling site on main thread is blocked until its
1166 // request completes, and we signal completion here. If CanDraw() is false, we
1167 // will indicate success=false to the caller, but we must still signal
1168 // completion to avoid deadlock.
1170 // We guard PrepareToDraw() with CanDraw() because it always returns a valid
1171 // frame, so can only be used when such a frame is possible. Since
1172 // DrawLayers() depends on the result of PrepareToDraw(), it is guarded on
1173 // CanDraw() as well.
1175 bool drawing_for_readback
= readback_requested
&& !!impl().readback_request
;
1176 bool can_do_readback
=
1177 impl().layer_tree_host_impl
->renderer()->CanReadPixels();
1179 LayerTreeHostImpl::FrameData frame
;
1180 bool draw_frame
= false;
1182 if (impl().layer_tree_host_impl
->CanDraw()) {
1183 if (!drawing_for_readback
|| can_do_readback
) {
1184 // If it is for a readback, make sure we draw the portion being read back.
1185 gfx::Rect readback_rect
;
1186 if (drawing_for_readback
)
1187 readback_rect
= impl().readback_request
->rect
;
1189 result
.draw_result
=
1190 impl().layer_tree_host_impl
->PrepareToDraw(&frame
, readback_rect
);
1191 draw_frame
= forced_draw
||
1192 result
.draw_result
== DrawSwapReadbackResult::DRAW_SUCCESS
;
1194 result
.draw_result
= DrawSwapReadbackResult::DRAW_ABORTED_CANT_READBACK
;
1197 result
.draw_result
= DrawSwapReadbackResult::DRAW_ABORTED_CANT_DRAW
;
1201 impl().layer_tree_host_impl
->DrawLayers(
1202 &frame
, impl().scheduler
->LastBeginImplFrameTime());
1203 result
.draw_result
= DrawSwapReadbackResult::DRAW_SUCCESS
;
1204 impl().animations_frozen_until_next_draw
= false;
1205 } else if (result
.draw_result
==
1206 DrawSwapReadbackResult::DRAW_ABORTED_CHECKERBOARD_ANIMATIONS
&&
1207 !impl().layer_tree_host_impl
->settings().impl_side_painting
) {
1208 // Without impl-side painting, the animated layer that is checkerboarding
1209 // will continue to checkerboard until the next commit. If this layer
1210 // continues to move during the commit, it may continue to checkerboard
1211 // after the commit since the region rasterized during the commit will not
1212 // match the region that is currently visible; eventually this
1213 // checkerboarding will be displayed when we force a draw. To avoid this,
1214 // we freeze animations until we successfully draw.
1215 impl().animations_frozen_until_next_draw
= true;
1216 impl().animation_freeze_time
= monotonic_time
;
1218 DCHECK_NE(DrawSwapReadbackResult::DRAW_SUCCESS
, result
.draw_result
);
1220 impl().layer_tree_host_impl
->DidDrawAllLayers(frame
);
1222 bool start_ready_animations
= draw_frame
;
1223 impl().layer_tree_host_impl
->UpdateAnimationState(start_ready_animations
);
1225 // Check for a pending CompositeAndReadback.
1226 if (drawing_for_readback
) {
1227 DCHECK(!swap_requested
);
1228 result
.did_readback
= false;
1230 if (!impl().layer_tree_host_impl
->IsContextLost()) {
1231 impl().layer_tree_host_impl
->Readback(impl().readback_request
->pixels
,
1232 impl().readback_request
->rect
);
1233 result
.did_readback
= true;
1235 result
.draw_result
= DrawSwapReadbackResult::DRAW_ABORTED_CONTEXT_LOST
;
1238 impl().readback_request
->success
= result
.did_readback
;
1239 impl().readback_request
->completion
.Signal();
1240 impl().readback_request
= NULL
;
1241 } else if (draw_frame
) {
1242 DCHECK(swap_requested
);
1243 result
.did_swap
= impl().layer_tree_host_impl
->SwapBuffers(frame
);
1245 // We don't know if we have incomplete tiles if we didn't actually swap.
1246 if (result
.did_swap
) {
1247 DCHECK(!frame
.has_no_damage
);
1248 SetSwapUsedIncompleteTileOnImplThread(frame
.contains_incomplete_tile
);
1252 // Tell the main thread that the the newly-commited frame was drawn.
1253 if (impl().next_frame_is_newly_committed_frame
) {
1254 impl().next_frame_is_newly_committed_frame
= false;
1255 Proxy::MainThreadTaskRunner()->PostTask(
1257 base::Bind(&ThreadProxy::DidCommitAndDrawFrame
, main_thread_weak_ptr_
));
1261 CheckOutputSurfaceStatusOnImplThread();
1263 if (result
.draw_result
== DrawSwapReadbackResult::DRAW_SUCCESS
) {
1264 base::TimeDelta draw_duration
= impl().timing_history
.DidFinishDrawing();
1266 base::TimeDelta draw_duration_overestimate
;
1267 base::TimeDelta draw_duration_underestimate
;
1268 if (draw_duration
> draw_duration_estimate
)
1269 draw_duration_underestimate
= draw_duration
- draw_duration_estimate
;
1271 draw_duration_overestimate
= draw_duration_estimate
- draw_duration
;
1272 UMA_HISTOGRAM_CUSTOM_TIMES("Renderer.DrawDuration",
1274 base::TimeDelta::FromMilliseconds(1),
1275 base::TimeDelta::FromMilliseconds(100),
1277 UMA_HISTOGRAM_CUSTOM_TIMES("Renderer.DrawDurationUnderestimate",
1278 draw_duration_underestimate
,
1279 base::TimeDelta::FromMilliseconds(1),
1280 base::TimeDelta::FromMilliseconds(100),
1282 UMA_HISTOGRAM_CUSTOM_TIMES("Renderer.DrawDurationOverestimate",
1283 draw_duration_overestimate
,
1284 base::TimeDelta::FromMilliseconds(1),
1285 base::TimeDelta::FromMilliseconds(100),
1289 DCHECK_NE(DrawSwapReadbackResult::INVALID_RESULT
, result
.draw_result
);
1293 void ThreadProxy::AcquireLayerTextures() {
1294 // Called when the main thread needs to modify a layer texture that is used
1295 // directly by the compositor.
1296 // This method will block until the next compositor draw if there is a
1297 // previously committed frame that is still undrawn. This is necessary to
1298 // ensure that the main thread does not monopolize access to the textures.
1299 DCHECK(IsMainThread());
1301 if (main().textures_acquired
)
1304 TRACE_EVENT0("cc", "ThreadProxy::AcquireLayerTextures");
1305 DebugScopedSetMainThreadBlocked
main_thread_blocked(this);
1306 CompletionEvent completion
;
1307 Proxy::ImplThreadTaskRunner()->PostTask(
1309 base::Bind(&ThreadProxy::AcquireLayerTexturesForMainThreadOnImplThread
,
1310 impl_thread_weak_ptr_
,
1312 // Block until it is safe to write to layer textures from the main thread.
1315 main().textures_acquired
= true;
1316 main().can_cancel_commit
= false;
1319 void ThreadProxy::AcquireLayerTexturesForMainThreadOnImplThread(
1320 CompletionEvent
* completion
) {
1321 DCHECK(IsImplThread());
1322 DCHECK(!impl().texture_acquisition_completion_event
);
1324 impl().texture_acquisition_completion_event
= completion
;
1325 impl().scheduler
->SetMainThreadNeedsLayerTextures();
1328 void ThreadProxy::ScheduledActionAcquireLayerTexturesForMainThread() {
1329 DCHECK(impl().texture_acquisition_completion_event
);
1330 impl().texture_acquisition_completion_event
->Signal();
1331 impl().texture_acquisition_completion_event
= NULL
;
1334 void ThreadProxy::ScheduledActionManageTiles() {
1335 TRACE_EVENT0("cc", "ThreadProxy::ScheduledActionManageTiles");
1336 DCHECK(impl().layer_tree_host_impl
->settings().impl_side_painting
);
1337 impl().layer_tree_host_impl
->ManageTiles();
1340 DrawSwapReadbackResult
ThreadProxy::ScheduledActionDrawAndSwapIfPossible() {
1341 TRACE_EVENT0("cc", "ThreadProxy::ScheduledActionDrawAndSwap");
1343 // SchedulerStateMachine::DidDrawIfPossibleCompleted isn't set up to
1344 // handle DRAW_ABORTED_CANT_DRAW. Moreover, the scheduler should
1345 // never generate this call when it can't draw.
1346 DCHECK(impl().layer_tree_host_impl
->CanDraw());
1348 bool forced_draw
= false;
1349 bool swap_requested
= true;
1350 bool readback_requested
= false;
1351 return DrawSwapReadbackInternal(
1352 forced_draw
, swap_requested
, readback_requested
);
1355 DrawSwapReadbackResult
ThreadProxy::ScheduledActionDrawAndSwapForced() {
1356 TRACE_EVENT0("cc", "ThreadProxy::ScheduledActionDrawAndSwapForced");
1357 bool forced_draw
= true;
1358 bool swap_requested
= true;
1359 bool readback_requested
= false;
1360 return DrawSwapReadbackInternal(
1361 forced_draw
, swap_requested
, readback_requested
);
1364 DrawSwapReadbackResult
ThreadProxy::ScheduledActionDrawAndReadback() {
1365 TRACE_EVENT0("cc", "ThreadProxy::ScheduledActionDrawAndReadback");
1366 bool forced_draw
= true;
1367 bool swap_requested
= false;
1368 bool readback_requested
= true;
1369 return DrawSwapReadbackInternal(
1370 forced_draw
, swap_requested
, readback_requested
);
1373 void ThreadProxy::DidAnticipatedDrawTimeChange(base::TimeTicks time
) {
1374 if (impl().current_resource_update_controller
)
1375 impl().current_resource_update_controller
->PerformMoreUpdates(time
);
1378 base::TimeDelta
ThreadProxy::DrawDurationEstimate() {
1379 return impl().timing_history
.DrawDurationEstimate();
1382 base::TimeDelta
ThreadProxy::BeginMainFrameToCommitDurationEstimate() {
1383 return impl().timing_history
.BeginMainFrameToCommitDurationEstimate();
1386 base::TimeDelta
ThreadProxy::CommitToActivateDurationEstimate() {
1387 return impl().timing_history
.CommitToActivateDurationEstimate();
1390 void ThreadProxy::PostBeginImplFrameDeadline(const base::Closure
& closure
,
1391 base::TimeTicks deadline
) {
1392 base::TimeDelta delta
= deadline
- gfx::FrameTime::Now();
1393 if (delta
<= base::TimeDelta())
1394 delta
= base::TimeDelta();
1395 Proxy::ImplThreadTaskRunner()->PostDelayedTask(FROM_HERE
, closure
, delta
);
1398 void ThreadProxy::DidBeginImplFrameDeadline() {
1399 impl().layer_tree_host_impl
->ResetCurrentFrameTimeForNextFrame();
1402 void ThreadProxy::ReadyToFinalizeTextureUpdates() {
1403 DCHECK(IsImplThread());
1404 impl().scheduler
->FinishCommit();
1407 void ThreadProxy::DidCommitAndDrawFrame() {
1408 DCHECK(IsMainThread());
1409 if (!layer_tree_host())
1411 layer_tree_host()->DidCommitAndDrawFrame();
1414 void ThreadProxy::DidCompleteSwapBuffers() {
1415 DCHECK(IsMainThread());
1416 if (!layer_tree_host())
1418 layer_tree_host()->DidCompleteSwapBuffers();
1421 void ThreadProxy::SetAnimationEvents(scoped_ptr
<AnimationEventsVector
> events
,
1422 base::Time wall_clock_time
) {
1423 TRACE_EVENT0("cc", "ThreadProxy::SetAnimationEvents");
1424 DCHECK(IsMainThread());
1425 if (!layer_tree_host())
1427 layer_tree_host()->SetAnimationEvents(events
.Pass(), wall_clock_time
);
1430 void ThreadProxy::CreateAndInitializeOutputSurface() {
1431 TRACE_EVENT0("cc", "ThreadProxy::CreateAndInitializeOutputSurface");
1432 DCHECK(IsMainThread());
1434 // Check that output surface has not been recreated by CompositeAndReadback
1435 // after this task is posted but before it is run.
1436 bool has_initialized_output_surface
= true;
1438 CompletionEvent completion
;
1439 Proxy::ImplThreadTaskRunner()->PostTask(
1441 base::Bind(&ThreadProxy::HasInitializedOutputSurfaceOnImplThread
,
1442 impl_thread_weak_ptr_
,
1444 &has_initialized_output_surface
));
1447 if (has_initialized_output_surface
)
1450 layer_tree_host()->DidLoseOutputSurface();
1451 main().output_surface_creation_callback
.Reset(
1452 base::Bind(&ThreadProxy::DoCreateAndInitializeOutputSurface
,
1453 base::Unretained(this)));
1454 main().output_surface_creation_callback
.callback().Run();
1457 void ThreadProxy::HasInitializedOutputSurfaceOnImplThread(
1458 CompletionEvent
* completion
,
1459 bool* has_initialized_output_surface
) {
1460 DCHECK(IsImplThread());
1461 *has_initialized_output_surface
=
1462 impl().scheduler
->HasInitializedOutputSurface();
1463 completion
->Signal();
1466 void ThreadProxy::InitializeImplOnImplThread(CompletionEvent
* completion
) {
1467 TRACE_EVENT0("cc", "ThreadProxy::InitializeImplOnImplThread");
1468 DCHECK(IsImplThread());
1469 impl().layer_tree_host_impl
=
1470 layer_tree_host()->CreateLayerTreeHostImpl(this);
1471 const LayerTreeSettings
& settings
= layer_tree_host()->settings();
1472 SchedulerSettings scheduler_settings
;
1473 scheduler_settings
.impl_side_painting
= settings
.impl_side_painting
;
1474 scheduler_settings
.timeout_and_draw_when_animation_checkerboards
=
1475 settings
.timeout_and_draw_when_animation_checkerboards
;
1476 scheduler_settings
.maximum_number_of_failed_draws_before_draw_is_forced_
=
1477 settings
.maximum_number_of_failed_draws_before_draw_is_forced_
;
1478 scheduler_settings
.using_synchronous_renderer_compositor
=
1479 settings
.using_synchronous_renderer_compositor
;
1480 scheduler_settings
.throttle_frame_production
=
1481 settings
.throttle_frame_production
;
1483 Scheduler::Create(this, scheduler_settings
, impl().layer_tree_host_id
);
1484 impl().scheduler
->SetVisible(impl().layer_tree_host_impl
->visible());
1486 impl_thread_weak_ptr_
= impl().weak_factory
.GetWeakPtr();
1487 completion
->Signal();
1490 void ThreadProxy::InitializeOutputSurfaceOnImplThread(
1491 CompletionEvent
* completion
,
1492 scoped_ptr
<OutputSurface
> output_surface
,
1493 scoped_refptr
<ContextProvider
> offscreen_context_provider
,
1495 RendererCapabilities
* capabilities
) {
1496 TRACE_EVENT0("cc", "ThreadProxy::InitializeOutputSurfaceOnImplThread");
1497 DCHECK(IsImplThread());
1498 DCHECK(IsMainThreadBlocked());
1500 DCHECK(capabilities
);
1502 layer_tree_host()->DeleteContentsTexturesOnImplThread(
1503 impl().layer_tree_host_impl
->resource_provider());
1506 impl().layer_tree_host_impl
->InitializeRenderer(output_surface
.Pass());
1509 *capabilities
= impl()
1510 .layer_tree_host_impl
->GetRendererCapabilities()
1511 .MainThreadCapabilities();
1512 impl().scheduler
->DidCreateAndInitializeOutputSurface();
1513 } else if (offscreen_context_provider
.get()) {
1514 if (offscreen_context_provider
->BindToCurrentThread())
1515 offscreen_context_provider
->VerifyContexts();
1516 offscreen_context_provider
= NULL
;
1519 impl().layer_tree_host_impl
->SetOffscreenContextProvider(
1520 offscreen_context_provider
);
1522 completion
->Signal();
1525 void ThreadProxy::FinishGLOnImplThread(CompletionEvent
* completion
) {
1526 TRACE_EVENT0("cc", "ThreadProxy::FinishGLOnImplThread");
1527 DCHECK(IsImplThread());
1528 if (impl().layer_tree_host_impl
->resource_provider())
1529 impl().layer_tree_host_impl
->resource_provider()->Finish();
1530 completion
->Signal();
1533 void ThreadProxy::LayerTreeHostClosedOnImplThread(CompletionEvent
* completion
) {
1534 TRACE_EVENT0("cc", "ThreadProxy::LayerTreeHostClosedOnImplThread");
1535 DCHECK(IsImplThread());
1536 layer_tree_host()->DeleteContentsTexturesOnImplThread(
1537 impl().layer_tree_host_impl
->resource_provider());
1538 impl().current_resource_update_controller
.reset();
1539 impl().layer_tree_host_impl
->SetNeedsBeginImplFrame(false);
1540 impl().scheduler
.reset();
1541 impl().layer_tree_host_impl
.reset();
1542 impl().weak_factory
.InvalidateWeakPtrs();
1543 impl().contents_texture_manager
= NULL
;
1544 completion
->Signal();
1547 size_t ThreadProxy::MaxPartialTextureUpdates() const {
1548 return ResourceUpdateController::MaxPartialTextureUpdates();
1551 ThreadProxy::BeginMainFrameAndCommitState::BeginMainFrameAndCommitState()
1552 : memory_allocation_limit_bytes(0),
1553 memory_allocation_priority_cutoff(0),
1554 evicted_ui_resources(false) {}
1556 ThreadProxy::BeginMainFrameAndCommitState::~BeginMainFrameAndCommitState() {}
1558 scoped_ptr
<base::Value
> ThreadProxy::AsValue() const {
1559 scoped_ptr
<base::DictionaryValue
> state(new base::DictionaryValue());
1561 CompletionEvent completion
;
1563 DebugScopedSetMainThreadBlocked
main_thread_blocked(
1564 const_cast<ThreadProxy
*>(this));
1565 Proxy::ImplThreadTaskRunner()->PostTask(
1567 base::Bind(&ThreadProxy::AsValueOnImplThread
,
1568 impl_thread_weak_ptr_
,
1573 return state
.PassAs
<base::Value
>();
1576 void ThreadProxy::AsValueOnImplThread(CompletionEvent
* completion
,
1577 base::DictionaryValue
* state
) const {
1578 state
->Set("layer_tree_host_impl",
1579 impl().layer_tree_host_impl
->AsValue().release());
1580 completion
->Signal();
1583 bool ThreadProxy::CommitPendingForTesting() {
1584 DCHECK(IsMainThread());
1585 CommitPendingRequest commit_pending_request
;
1587 DebugScopedSetMainThreadBlocked
main_thread_blocked(this);
1588 Proxy::ImplThreadTaskRunner()->PostTask(
1590 base::Bind(&ThreadProxy::CommitPendingOnImplThreadForTesting
,
1591 impl_thread_weak_ptr_
,
1592 &commit_pending_request
));
1593 commit_pending_request
.completion
.Wait();
1595 return commit_pending_request
.commit_pending
;
1598 void ThreadProxy::CommitPendingOnImplThreadForTesting(
1599 CommitPendingRequest
* request
) {
1600 DCHECK(IsImplThread());
1601 if (impl().layer_tree_host_impl
->output_surface())
1602 request
->commit_pending
= impl().scheduler
->CommitPending();
1604 request
->commit_pending
= false;
1605 request
->completion
.Signal();
1608 scoped_ptr
<base::Value
> ThreadProxy::SchedulerStateAsValueForTesting() {
1610 return impl().scheduler
->StateAsValue().Pass();
1612 SchedulerStateRequest scheduler_state_request
;
1614 DebugScopedSetMainThreadBlocked
main_thread_blocked(this);
1615 Proxy::ImplThreadTaskRunner()->PostTask(
1617 base::Bind(&ThreadProxy::SchedulerStateAsValueOnImplThreadForTesting
,
1618 impl_thread_weak_ptr_
,
1619 &scheduler_state_request
));
1620 scheduler_state_request
.completion
.Wait();
1622 return scheduler_state_request
.state
.Pass();
1625 void ThreadProxy::SchedulerStateAsValueOnImplThreadForTesting(
1626 SchedulerStateRequest
* request
) {
1627 DCHECK(IsImplThread());
1628 request
->state
= impl().scheduler
->StateAsValue();
1629 request
->completion
.Signal();
1632 void ThreadProxy::RenewTreePriority() {
1633 DCHECK(IsImplThread());
1634 bool smoothness_takes_priority
=
1635 impl().layer_tree_host_impl
->pinch_gesture_active() ||
1636 impl().layer_tree_host_impl
->IsCurrentlyScrolling() ||
1637 impl().layer_tree_host_impl
->page_scale_animation_active();
1639 base::TimeTicks now
= impl().layer_tree_host_impl
->CurrentPhysicalTimeTicks();
1641 // Update expiration time if smoothness currently takes priority.
1642 if (smoothness_takes_priority
) {
1643 impl().smoothness_takes_priority_expiration_time
=
1644 now
+ base::TimeDelta::FromMilliseconds(
1645 kSmoothnessTakesPriorityExpirationDelay
* 1000);
1648 // We use the same priority for both trees by default.
1649 TreePriority priority
= SAME_PRIORITY_FOR_BOTH_TREES
;
1651 // Smoothness takes priority if expiration time is in the future.
1652 if (impl().smoothness_takes_priority_expiration_time
> now
)
1653 priority
= SMOOTHNESS_TAKES_PRIORITY
;
1655 // New content always takes priority when the active tree has
1656 // evicted resources or there is an invalid viewport size.
1657 if (impl().layer_tree_host_impl
->active_tree()->ContentsTexturesPurged() ||
1658 impl().layer_tree_host_impl
->active_tree()->ViewportSizeInvalid() ||
1659 impl().layer_tree_host_impl
->EvictedUIResourcesExist() ||
1660 impl().input_throttled_until_commit
)
1661 priority
= NEW_CONTENT_TAKES_PRIORITY
;
1663 impl().layer_tree_host_impl
->SetTreePriority(priority
);
1664 impl().scheduler
->SetSmoothnessTakesPriority(priority
==
1665 SMOOTHNESS_TAKES_PRIORITY
);
1667 // Notify the the client of this compositor via the output surface.
1668 // TODO(epenner): Route this to compositor-thread instead of output-surface
1669 // after GTFO refactor of compositor-thread (http://crbug/170828).
1670 if (impl().layer_tree_host_impl
->output_surface()) {
1672 .layer_tree_host_impl
->output_surface()
1673 ->UpdateSmoothnessTakesPriority(priority
== SMOOTHNESS_TAKES_PRIORITY
);
1676 base::TimeDelta delay
=
1677 impl().smoothness_takes_priority_expiration_time
- now
;
1679 // Need to make sure a delayed task is posted when we have smoothness
1680 // takes priority expiration time in the future.
1681 if (delay
<= base::TimeDelta())
1683 if (impl().renew_tree_priority_pending
)
1686 Proxy::ImplThreadTaskRunner()->PostDelayedTask(
1688 base::Bind(&ThreadProxy::RenewTreePriorityOnImplThread
,
1689 impl_thread_weak_ptr_
),
1692 impl().renew_tree_priority_pending
= true;
1695 void ThreadProxy::RenewTreePriorityOnImplThread() {
1696 DCHECK(impl().renew_tree_priority_pending
);
1697 impl().renew_tree_priority_pending
= false;
1699 RenewTreePriority();
1702 void ThreadProxy::RequestScrollbarAnimationOnImplThread(base::TimeDelta delay
) {
1703 Proxy::ImplThreadTaskRunner()->PostDelayedTask(
1705 base::Bind(&ThreadProxy::StartScrollbarAnimationOnImplThread
,
1706 impl_thread_weak_ptr_
),
1710 void ThreadProxy::StartScrollbarAnimationOnImplThread() {
1711 impl().layer_tree_host_impl
->StartScrollbarAnimation();
1714 void ThreadProxy::DidActivatePendingTree() {
1715 TRACE_EVENT0("cc", "ThreadProxy::DidActivatePendingTreeOnImplThread");
1716 DCHECK(IsImplThread());
1718 if (impl().completion_event_for_commit_held_on_tree_activation
&&
1719 !impl().layer_tree_host_impl
->pending_tree()) {
1720 TRACE_EVENT_INSTANT0(
1721 "cc", "ReleaseCommitbyActivation", TRACE_EVENT_SCOPE_THREAD
);
1722 DCHECK(impl().layer_tree_host_impl
->settings().impl_side_painting
);
1723 impl().completion_event_for_commit_held_on_tree_activation
->Signal();
1724 impl().completion_event_for_commit_held_on_tree_activation
= NULL
;
1727 UpdateBackgroundAnimateTicking();
1729 impl().timing_history
.DidActivatePendingTree();
1732 void ThreadProxy::DidManageTiles() {
1733 DCHECK(IsImplThread());
1734 impl().scheduler
->DidManageTiles();