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1 // Copyright 2011 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "cc/scheduler/scheduler.h" | 5 #include "cc/scheduler/scheduler.h" |
6 | 6 |
7 #include <algorithm> | 7 #include <algorithm> |
8 | 8 |
9 #include "base/auto_reset.h" | 9 #include "base/auto_reset.h" |
10 #include "base/debug/trace_event.h" | 10 #include "base/debug/trace_event.h" |
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386 } | 386 } |
387 } | 387 } |
388 | 388 |
389 // BeginFrame is the mechanism that tells us that now is a good time to start | 389 // BeginFrame is the mechanism that tells us that now is a good time to start |
390 // making a frame. Usually this means that user input for the frame is complete. | 390 // making a frame. Usually this means that user input for the frame is complete. |
391 // If the scheduler is busy, we queue the BeginFrame to be handled later as | 391 // If the scheduler is busy, we queue the BeginFrame to be handled later as |
392 // a BeginRetroFrame. | 392 // a BeginRetroFrame. |
393 bool Scheduler::OnBeginFrameMixInDelegate(const BeginFrameArgs& args) { | 393 bool Scheduler::OnBeginFrameMixInDelegate(const BeginFrameArgs& args) { |
394 TRACE_EVENT1("cc", "Scheduler::BeginFrame", "args", args.AsValue()); | 394 TRACE_EVENT1("cc", "Scheduler::BeginFrame", "args", args.AsValue()); |
395 | 395 |
| 396 // Deliver BeginFrames to children. |
| 397 if (settings_.forward_begin_frames_to_children && |
| 398 state_machine_.children_need_begin_frames()) { |
| 399 BeginFrameArgs adjusted_args_for_children(args); |
| 400 // Adjust a deadline for child schedulers. |
| 401 // TODO(simonhong): Once we have commitless update, we can get rid of |
| 402 // BeginMainFrameToCommitDurationEstimate() + |
| 403 // CommitToActivateDurationEstimate(). |
| 404 adjusted_args_for_children.deadline -= |
| 405 (client_->BeginMainFrameToCommitDurationEstimate() + |
| 406 client_->CommitToActivateDurationEstimate() + |
| 407 client_->DrawDurationEstimate() + EstimatedParentDrawTime()); |
| 408 client_->SendBeginFramesToChildren(adjusted_args_for_children); |
| 409 } |
| 410 |
396 // We have just called SetNeedsBeginFrame(true) and the BeginFrameSource has | 411 // We have just called SetNeedsBeginFrame(true) and the BeginFrameSource has |
397 // sent us the last BeginFrame we have missed. As we might not be able to | 412 // sent us the last BeginFrame we have missed. As we might not be able to |
398 // actually make rendering for this call, handle it like a "retro frame". | 413 // actually make rendering for this call, handle it like a "retro frame". |
399 // TODO(brainderson): Add a test for this functionality ASAP! | 414 // TODO(brainderson): Add a test for this functionality ASAP! |
400 if (args.type == BeginFrameArgs::MISSED) { | 415 if (args.type == BeginFrameArgs::MISSED) { |
401 begin_retro_frame_args_.push_back(args); | 416 begin_retro_frame_args_.push_back(args); |
402 PostBeginRetroFrameIfNeeded(); | 417 PostBeginRetroFrameIfNeeded(); |
403 return true; | 418 return true; |
404 } | 419 } |
405 | 420 |
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421 begin_retro_frame_args_.push_back(adjusted_args); | 436 begin_retro_frame_args_.push_back(adjusted_args); |
422 TRACE_EVENT_INSTANT0( | 437 TRACE_EVENT_INSTANT0( |
423 "cc", "Scheduler::BeginFrame deferred", TRACE_EVENT_SCOPE_THREAD); | 438 "cc", "Scheduler::BeginFrame deferred", TRACE_EVENT_SCOPE_THREAD); |
424 // Queuing the frame counts as "using it", so we need to return true. | 439 // Queuing the frame counts as "using it", so we need to return true. |
425 } else { | 440 } else { |
426 BeginImplFrame(adjusted_args); | 441 BeginImplFrame(adjusted_args); |
427 } | 442 } |
428 return true; | 443 return true; |
429 } | 444 } |
430 | 445 |
| 446 void Scheduler::SetChildrenNeedBeginFrames(bool children_need_begin_frames) { |
| 447 DCHECK(settings_.forward_begin_frames_to_children); |
| 448 state_machine_.SetChildrenNeedBeginFrames(children_need_begin_frames); |
| 449 DCHECK_EQ(state_machine_.NextAction(), SchedulerStateMachine::ACTION_NONE); |
| 450 } |
| 451 |
431 // BeginRetroFrame is called for BeginFrames that we've deferred because | 452 // BeginRetroFrame is called for BeginFrames that we've deferred because |
432 // the scheduler was in the middle of processing a previous BeginFrame. | 453 // the scheduler was in the middle of processing a previous BeginFrame. |
433 void Scheduler::BeginRetroFrame() { | 454 void Scheduler::BeginRetroFrame() { |
434 TRACE_EVENT0("cc", "Scheduler::BeginRetroFrame"); | 455 TRACE_EVENT0("cc", "Scheduler::BeginRetroFrame"); |
435 DCHECK(!settings_.using_synchronous_renderer_compositor); | 456 DCHECK(!settings_.using_synchronous_renderer_compositor); |
436 DCHECK(begin_retro_frame_posted_); | 457 DCHECK(begin_retro_frame_posted_); |
437 begin_retro_frame_posted_ = false; | 458 begin_retro_frame_posted_ = false; |
438 | 459 |
439 // If there aren't any retroactive BeginFrames, then we've lost the | 460 // If there aren't any retroactive BeginFrames, then we've lost the |
440 // OutputSurface and should abort. | 461 // OutputSurface and should abort. |
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777 } | 798 } |
778 | 799 |
779 bool Scheduler::IsBeginMainFrameSentOrStarted() const { | 800 bool Scheduler::IsBeginMainFrameSentOrStarted() const { |
780 return (state_machine_.commit_state() == | 801 return (state_machine_.commit_state() == |
781 SchedulerStateMachine::COMMIT_STATE_BEGIN_MAIN_FRAME_SENT || | 802 SchedulerStateMachine::COMMIT_STATE_BEGIN_MAIN_FRAME_SENT || |
782 state_machine_.commit_state() == | 803 state_machine_.commit_state() == |
783 SchedulerStateMachine::COMMIT_STATE_BEGIN_MAIN_FRAME_STARTED); | 804 SchedulerStateMachine::COMMIT_STATE_BEGIN_MAIN_FRAME_STARTED); |
784 } | 805 } |
785 | 806 |
786 } // namespace cc | 807 } // namespace cc |
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