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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 #ifndef CC_SCHEDULER_SCHEDULER_STATE_MACHINE_H_ | 5 #ifndef CC_SCHEDULER_SCHEDULER_STATE_MACHINE_H_ |
6 #define CC_SCHEDULER_SCHEDULER_STATE_MACHINE_H_ | 6 #define CC_SCHEDULER_SCHEDULER_STATE_MACHINE_H_ |
7 | 7 |
8 #include <string> | 8 #include <string> |
9 | 9 |
10 #include "base/basictypes.h" | 10 #include "base/basictypes.h" |
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119 scoped_refptr<base::trace_event::ConvertableToTraceFormat> AsValue() const; | 119 scoped_refptr<base::trace_event::ConvertableToTraceFormat> AsValue() const; |
120 void AsValueInto(base::trace_event::TracedValue* dict) const; | 120 void AsValueInto(base::trace_event::TracedValue* dict) const; |
121 | 121 |
122 Action NextAction() const; | 122 Action NextAction() const; |
123 void UpdateState(Action action); | 123 void UpdateState(Action action); |
124 | 124 |
125 // Indicates whether the impl thread needs a BeginImplFrame callback in order | 125 // Indicates whether the impl thread needs a BeginImplFrame callback in order |
126 // to make progress. | 126 // to make progress. |
127 bool BeginFrameNeeded() const; | 127 bool BeginFrameNeeded() const; |
128 | 128 |
| 129 // Notifies the statme machine that the Scheduler skipped a BeginImplFrame |
| 130 // so the state machine can reset associated state. |
| 131 void DidSkipBeginImplFrameToReduceLatency(); |
| 132 |
129 // Indicates that the system has entered and left a BeginImplFrame callback. | 133 // Indicates that the system has entered and left a BeginImplFrame callback. |
130 // The scheduler will not draw more than once in a given BeginImplFrame | 134 // The scheduler will not draw more than once in a given BeginImplFrame |
131 // callback nor send more than one BeginMainFrame message. | 135 // callback nor send more than one BeginMainFrame message. |
132 void OnBeginImplFrame(); | 136 void OnBeginImplFrame(); |
133 void OnBeginImplFrameDeadlinePending(); | 137 void OnBeginImplFrameDeadlinePending(); |
134 // Indicates that the scheduler has entered the draw phase. The scheduler | 138 // Indicates that the scheduler has entered the draw phase. The scheduler |
135 // will not draw more than once in a single draw phase. | 139 // will not draw more than once in a single draw phase. |
136 // TODO(sunnyps): Rename OnBeginImplFrameDeadline to OnDraw or similar. | 140 // TODO(sunnyps): Rename OnBeginImplFrameDeadline to OnDraw or similar. |
137 void OnBeginImplFrameDeadline(); | 141 void OnBeginImplFrameDeadline(); |
138 void OnBeginImplFrameIdle(); | 142 void OnBeginImplFrameIdle(); |
139 BeginImplFrameState begin_impl_frame_state() const { | 143 BeginImplFrameState begin_impl_frame_state() const { |
140 return begin_impl_frame_state_; | 144 return begin_impl_frame_state_; |
141 } | 145 } |
142 BeginImplFrameDeadlineMode CurrentBeginImplFrameDeadlineMode() const; | 146 BeginImplFrameDeadlineMode CurrentBeginImplFrameDeadlineMode() const; |
143 | 147 |
144 // If the main thread didn't manage to produce a new frame in time for the | 148 // If the main thread didn't manage to produce a new frame in time for the |
145 // impl thread to draw, it is in a high latency mode. | 149 // impl thread to draw, it is in a high latency mode. |
146 bool MainThreadIsInHighLatencyMode() const; | 150 bool MainThreadIsInHighLatencyMode() const; |
147 | 151 |
| 152 bool swaps_are_likely_high_latency() const { |
| 153 return swaps_are_likely_high_latency_; |
| 154 } |
| 155 |
148 // Indicates whether the LayerTreeHostImpl is visible. | 156 // Indicates whether the LayerTreeHostImpl is visible. |
149 void SetVisible(bool visible); | 157 void SetVisible(bool visible); |
150 bool visible() const { return visible_; } | 158 bool visible() const { return visible_; } |
151 | 159 |
152 // Indicates that a redraw is required, either due to the impl tree changing | 160 // Indicates that a redraw is required, either due to the impl tree changing |
153 // or the screen being damaged and simply needing redisplay. | 161 // or the screen being damaged and simply needing redisplay. |
154 void SetNeedsRedraw(); | 162 void SetNeedsRedraw(); |
155 bool needs_redraw() const { return needs_redraw_; } | 163 bool needs_redraw() const { return needs_redraw_; } |
156 | 164 |
157 void SetNeedsAnimate(); | 165 void SetNeedsAnimate(); |
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310 bool invalidate_output_surface_funnel_; | 318 bool invalidate_output_surface_funnel_; |
311 // prepare_tiles_funnel_ is "filled" each time PrepareTiles is called | 319 // prepare_tiles_funnel_ is "filled" each time PrepareTiles is called |
312 // and "drained" on each BeginImplFrame. If the funnel gets too full, | 320 // and "drained" on each BeginImplFrame. If the funnel gets too full, |
313 // we start throttling ACTION_PREPARE_TILES such that we average one | 321 // we start throttling ACTION_PREPARE_TILES such that we average one |
314 // PrepareTiles per BeginImplFrame. | 322 // PrepareTiles per BeginImplFrame. |
315 int prepare_tiles_funnel_; | 323 int prepare_tiles_funnel_; |
316 | 324 |
317 int consecutive_checkerboard_animations_; | 325 int consecutive_checkerboard_animations_; |
318 int max_pending_swaps_; | 326 int max_pending_swaps_; |
319 int pending_swaps_; | 327 int pending_swaps_; |
| 328 bool swaps_are_likely_high_latency_; |
| 329 bool swap_throttled_in_last_deadline_; |
320 bool needs_redraw_; | 330 bool needs_redraw_; |
321 bool needs_animate_; | 331 bool needs_animate_; |
322 bool needs_prepare_tiles_; | 332 bool needs_prepare_tiles_; |
323 bool needs_commit_; | 333 bool needs_commit_; |
324 bool visible_; | 334 bool visible_; |
325 bool can_start_; | 335 bool can_start_; |
326 bool can_draw_; | 336 bool can_draw_; |
327 bool has_pending_tree_; | 337 bool has_pending_tree_; |
328 bool pending_tree_is_ready_for_activation_; | 338 bool pending_tree_is_ready_for_activation_; |
329 bool active_tree_needs_first_draw_; | 339 bool active_tree_needs_first_draw_; |
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340 bool did_request_swap_in_last_frame_; | 350 bool did_request_swap_in_last_frame_; |
341 bool did_perform_swap_in_last_draw_; | 351 bool did_perform_swap_in_last_draw_; |
342 | 352 |
343 private: | 353 private: |
344 DISALLOW_COPY_AND_ASSIGN(SchedulerStateMachine); | 354 DISALLOW_COPY_AND_ASSIGN(SchedulerStateMachine); |
345 }; | 355 }; |
346 | 356 |
347 } // namespace cc | 357 } // namespace cc |
348 | 358 |
349 #endif // CC_SCHEDULER_SCHEDULER_STATE_MACHINE_H_ | 359 #endif // CC_SCHEDULER_SCHEDULER_STATE_MACHINE_H_ |
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