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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 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/begin_frame_source.h" | 5 #include "cc/scheduler/begin_frame_source.h" |
6 | 6 |
7 #include <stddef.h> | 7 #include <stddef.h> |
8 | 8 |
9 #include "base/auto_reset.h" | 9 #include "base/auto_reset.h" |
10 #include "base/location.h" | 10 #include "base/location.h" |
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171 std::unordered_set<BeginFrameObserver*> observers(observers_); | 171 std::unordered_set<BeginFrameObserver*> observers(observers_); |
172 for (auto* obs : observers) { | 172 for (auto* obs : observers) { |
173 BeginFrameArgs last_args = obs->LastUsedBeginFrameArgs(); | 173 BeginFrameArgs last_args = obs->LastUsedBeginFrameArgs(); |
174 if (!last_args.IsValid() || | 174 if (!last_args.IsValid() || |
175 (args.frame_time > | 175 (args.frame_time > |
176 last_args.frame_time + args.interval / kDoubleTickDivisor)) | 176 last_args.frame_time + args.interval / kDoubleTickDivisor)) |
177 obs->OnBeginFrame(args); | 177 obs->OnBeginFrame(args); |
178 } | 178 } |
179 } | 179 } |
180 | 180 |
181 ExternalBeginFrameSource::ExternalBeginFrameSource( | |
182 ExternalBeginFrameSourceClient* client) | |
183 : client_(client) { | |
184 DCHECK(client_); | |
185 } | |
186 | |
187 ExternalBeginFrameSource::~ExternalBeginFrameSource() {} | |
danakj
2016/08/26 22:39:13
= default
| |
188 | |
189 void ExternalBeginFrameSource::AddObserver(BeginFrameObserver* obs) { | |
190 DCHECK(obs); | |
191 DCHECK(observers_.find(obs) == observers_.end()); | |
192 | |
193 bool observers_was_empty = observers_.empty(); | |
194 observers_.insert(obs); | |
195 obs->OnBeginFrameSourcePausedChanged(paused_); | |
196 if (observers_was_empty) | |
197 client_->OnNeedsBeginFrames(true); | |
198 | |
199 // Send a MISSED begin frame if necessary. | |
200 if (missed_begin_frame_args_.IsValid()) { | |
201 BeginFrameArgs last_args = obs->LastUsedBeginFrameArgs(); | |
202 if (!last_args.IsValid() || | |
203 (missed_begin_frame_args_.frame_time > last_args.frame_time)) { | |
204 obs->OnBeginFrame(missed_begin_frame_args_); | |
205 } | |
206 } | |
207 } | |
208 | |
209 void ExternalBeginFrameSource::RemoveObserver(BeginFrameObserver* obs) { | |
210 DCHECK(obs); | |
211 DCHECK(observers_.find(obs) != observers_.end()); | |
212 | |
213 observers_.erase(obs); | |
214 if (observers_.empty()) { | |
215 missed_begin_frame_args_ = BeginFrameArgs(); | |
216 client_->OnNeedsBeginFrames(false); | |
217 } | |
218 } | |
219 | |
220 void ExternalBeginFrameSource::OnSetBeginFrameSourcePaused(bool paused) { | |
221 if (paused_ == paused) | |
222 return; | |
223 paused_ = paused; | |
224 std::unordered_set<BeginFrameObserver*> observers(observers_); | |
225 for (auto* obs : observers) | |
226 obs->OnBeginFrameSourcePausedChanged(paused_); | |
227 } | |
228 | |
229 void ExternalBeginFrameSource::OnBeginFrame(const BeginFrameArgs& args) { | |
230 missed_begin_frame_args_ = args; | |
231 missed_begin_frame_args_.type = BeginFrameArgs::MISSED; | |
232 std::unordered_set<BeginFrameObserver*> observers(observers_); | |
233 for (auto* obs : observers) | |
234 obs->OnBeginFrame(args); | |
235 } | |
236 | |
181 } // namespace cc | 237 } // namespace cc |
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