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Side by Side Diff: cc/scheduler/begin_frame_source.h

Issue 1057283003: Remove parts of //cc we aren't using (Closed) Base URL: git@github.com:domokit/mojo.git@master
Patch Set: Created 5 years, 8 months ago
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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 #ifndef CC_SCHEDULER_BEGIN_FRAME_SOURCE_H_ 5 #ifndef CC_SCHEDULER_BEGIN_FRAME_SOURCE_H_
6 #define CC_SCHEDULER_BEGIN_FRAME_SOURCE_H_ 6 #define CC_SCHEDULER_BEGIN_FRAME_SOURCE_H_
7 7
8 #include <set> 8 #include <set>
9 #include <string> 9 #include <string>
10 10
11 #include "base/logging.h" 11 #include "base/logging.h"
12 #include "base/trace_event/trace_event.h" 12 #include "base/trace_event/trace_event.h"
13 #include "cc/output/begin_frame_args.h" 13 #include "cc/output/begin_frame_args.h"
14 #include "cc/output/vsync_parameter_observer.h" 14 #include "cc/output/vsync_parameter_observer.h"
15 #include "cc/scheduler/delay_based_time_source.h" 15 #include "cc/scheduler/delay_based_time_source.h"
16 16
17 namespace cc { 17 namespace cc {
18 18
19 // (Pure) Interface for observing BeginFrame messages from BeginFrameSource 19 // (Pure) Interface for observing BeginFrame messages from BeginFrameSource
20 // objects. 20 // objects.
21 class CC_EXPORT BeginFrameObserver { 21 class BeginFrameObserver {
22 public: 22 public:
23 virtual ~BeginFrameObserver() {} 23 virtual ~BeginFrameObserver() {}
24 24
25 // The |args| given to OnBeginFrame is guaranteed to have 25 // The |args| given to OnBeginFrame is guaranteed to have
26 // |args|.IsValid()==true and have |args|.frame_time 26 // |args|.IsValid()==true and have |args|.frame_time
27 // field be strictly greater than the previous call. 27 // field be strictly greater than the previous call.
28 // 28 //
29 // Side effects: This function can (and most of the time *will*) change the 29 // Side effects: This function can (and most of the time *will*) change the
30 // return value of the LastUsedBeginFrameArgs method. See the documentation 30 // return value of the LastUsedBeginFrameArgs method. See the documentation
31 // on that method for more information. 31 // on that method for more information.
(...skipping 23 matching lines...) Expand all
55 55
56 // Simple mix in which implements a BeginFrameObserver which checks the 56 // Simple mix in which implements a BeginFrameObserver which checks the
57 // incoming values meet the BeginFrameObserver requirements and implements the 57 // incoming values meet the BeginFrameObserver requirements and implements the
58 // required LastUsedBeginFrameArgs behaviour. 58 // required LastUsedBeginFrameArgs behaviour.
59 // 59 //
60 // Users of this mix in should; 60 // Users of this mix in should;
61 // - Implement the OnBeginFrameMixInDelegate function. 61 // - Implement the OnBeginFrameMixInDelegate function.
62 // - Recommended (but not required) to call 62 // - Recommended (but not required) to call
63 // BeginFrameObserverMixIn::OnValueInto in their overridden OnValueInto 63 // BeginFrameObserverMixIn::OnValueInto in their overridden OnValueInto
64 // function. 64 // function.
65 class CC_EXPORT BeginFrameObserverMixIn : public BeginFrameObserver { 65 class BeginFrameObserverMixIn : public BeginFrameObserver {
66 public: 66 public:
67 BeginFrameObserverMixIn(); 67 BeginFrameObserverMixIn();
68 68
69 // BeginFrameObserver 69 // BeginFrameObserver
70 70
71 // Traces |args| and DCHECK |args| satisfies pre-conditions then calls 71 // Traces |args| and DCHECK |args| satisfies pre-conditions then calls
72 // OnBeginFrameMixInDelegate and updates the last_begin_frame_args_ value on 72 // OnBeginFrameMixInDelegate and updates the last_begin_frame_args_ value on
73 // true. 73 // true.
74 void OnBeginFrame(const BeginFrameArgs& args) override; 74 void OnBeginFrame(const BeginFrameArgs& args) override;
75 const BeginFrameArgs LastUsedBeginFrameArgs() const override; 75 const BeginFrameArgs LastUsedBeginFrameArgs() const override;
(...skipping 12 matching lines...) Expand all
88 88
89 // Interface for a class which produces BeginFrame calls to a 89 // Interface for a class which produces BeginFrame calls to a
90 // BeginFrameObserver. 90 // BeginFrameObserver.
91 // 91 //
92 // BeginFrame calls *normally* occur just after a vsync interrupt when input 92 // BeginFrame calls *normally* occur just after a vsync interrupt when input
93 // processing has been finished and provide information about the time values 93 // processing has been finished and provide information about the time values
94 // of the vsync times. *However*, these values can be heavily modified or even 94 // of the vsync times. *However*, these values can be heavily modified or even
95 // plain made up (when no vsync signal is available or vsync throttling is 95 // plain made up (when no vsync signal is available or vsync throttling is
96 // turned off). See the BeginFrameObserver for information about the guarantees 96 // turned off). See the BeginFrameObserver for information about the guarantees
97 // all BeginFrameSources *must* provide. 97 // all BeginFrameSources *must* provide.
98 class CC_EXPORT BeginFrameSource { 98 class BeginFrameSource {
99 public: 99 public:
100 virtual ~BeginFrameSource() {} 100 virtual ~BeginFrameSource() {}
101 101
102 // SetNeedsBeginFrames is the on/off "switch" for the BeginFrameSource. When 102 // SetNeedsBeginFrames is the on/off "switch" for the BeginFrameSource. When
103 // set to false no more BeginFrame messages should be sent to observer. 103 // set to false no more BeginFrame messages should be sent to observer.
104 virtual bool NeedsBeginFrames() const = 0; 104 virtual bool NeedsBeginFrames() const = 0;
105 virtual void SetNeedsBeginFrames(bool needs_begin_frames) = 0; 105 virtual void SetNeedsBeginFrames(bool needs_begin_frames) = 0;
106 106
107 // DidFinishFrame provides back pressure to a frame source about frame 107 // DidFinishFrame provides back pressure to a frame source about frame
108 // processing (rather than toggling SetNeedsBeginFrames every frame). It is 108 // processing (rather than toggling SetNeedsBeginFrames every frame). It is
(...skipping 16 matching lines...) Expand all
125 virtual void AsValueInto(base::trace_event::TracedValue* dict) const = 0; 125 virtual void AsValueInto(base::trace_event::TracedValue* dict) const = 0;
126 }; 126 };
127 127
128 // Simple mix in which implements a BeginFrameSource. 128 // Simple mix in which implements a BeginFrameSource.
129 // Implementation classes should: 129 // Implementation classes should:
130 // - Implement the pure virtual (Set)NeedsBeginFrames methods from 130 // - Implement the pure virtual (Set)NeedsBeginFrames methods from
131 // BeginFrameSource. 131 // BeginFrameSource.
132 // - Use the CallOnBeginFrame method to call to the observer(s). 132 // - Use the CallOnBeginFrame method to call to the observer(s).
133 // - Recommended (but not required) to call BeginFrameSourceMixIn::AsValueInto 133 // - Recommended (but not required) to call BeginFrameSourceMixIn::AsValueInto
134 // in their own AsValueInto implementation. 134 // in their own AsValueInto implementation.
135 class CC_EXPORT BeginFrameSourceMixIn : public BeginFrameSource { 135 class BeginFrameSourceMixIn : public BeginFrameSource {
136 public: 136 public:
137 ~BeginFrameSourceMixIn() override {} 137 ~BeginFrameSourceMixIn() override {}
138 138
139 // BeginFrameSource 139 // BeginFrameSource
140 bool NeedsBeginFrames() const final; 140 bool NeedsBeginFrames() const final;
141 void SetNeedsBeginFrames(bool needs_begin_frames) final; 141 void SetNeedsBeginFrames(bool needs_begin_frames) final;
142 void DidFinishFrame(size_t remaining_frames) override {} 142 void DidFinishFrame(size_t remaining_frames) override {}
143 void AddObserver(BeginFrameObserver* obs) final; 143 void AddObserver(BeginFrameObserver* obs) final;
144 void RemoveObserver(BeginFrameObserver* obs) final; 144 void RemoveObserver(BeginFrameObserver* obs) final;
145 void SetClientReady() override {} 145 void SetClientReady() override {}
(...skipping 15 matching lines...) Expand all
161 161
162 BeginFrameObserver* observer_; 162 BeginFrameObserver* observer_;
163 bool needs_begin_frames_; 163 bool needs_begin_frames_;
164 164
165 private: 165 private:
166 bool inside_as_value_into_; 166 bool inside_as_value_into_;
167 }; 167 };
168 168
169 // A frame source which calls BeginFrame (at the next possible time) as soon as 169 // A frame source which calls BeginFrame (at the next possible time) as soon as
170 // remaining frames reaches zero. 170 // remaining frames reaches zero.
171 class CC_EXPORT BackToBackBeginFrameSource : public BeginFrameSourceMixIn { 171 class BackToBackBeginFrameSource : public BeginFrameSourceMixIn {
172 public: 172 public:
173 static scoped_ptr<BackToBackBeginFrameSource> Create( 173 static scoped_ptr<BackToBackBeginFrameSource> Create(
174 base::SingleThreadTaskRunner* task_runner); 174 base::SingleThreadTaskRunner* task_runner);
175 ~BackToBackBeginFrameSource() override; 175 ~BackToBackBeginFrameSource() override;
176 176
177 // BeginFrameSource 177 // BeginFrameSource
178 void DidFinishFrame(size_t remaining_frames) override; 178 void DidFinishFrame(size_t remaining_frames) override;
179 179
180 // Tracing 180 // Tracing
181 void AsValueInto(base::trace_event::TracedValue* dict) const override; 181 void AsValueInto(base::trace_event::TracedValue* dict) const override;
(...skipping 11 matching lines...) Expand all
193 void OnNeedsBeginFramesChange(bool needs_begin_frames) override; 193 void OnNeedsBeginFramesChange(bool needs_begin_frames) override;
194 194
195 void BeginFrame(); 195 void BeginFrame();
196 196
197 private: 197 private:
198 base::WeakPtrFactory<BackToBackBeginFrameSource> weak_factory_; 198 base::WeakPtrFactory<BackToBackBeginFrameSource> weak_factory_;
199 }; 199 };
200 200
201 // A frame source which is locked to an external parameters provides from a 201 // A frame source which is locked to an external parameters provides from a
202 // vsync source and generates BeginFrameArgs for it. 202 // vsync source and generates BeginFrameArgs for it.
203 class CC_EXPORT SyntheticBeginFrameSource : public BeginFrameSourceMixIn, 203 class SyntheticBeginFrameSource : public BeginFrameSourceMixIn,
204 public VSyncParameterObserver, 204 public VSyncParameterObserver,
205 public TimeSourceClient { 205 public TimeSourceClient {
206 public: 206 public:
207 static scoped_ptr<SyntheticBeginFrameSource> Create( 207 static scoped_ptr<SyntheticBeginFrameSource> Create(
208 base::SingleThreadTaskRunner* task_runner, 208 base::SingleThreadTaskRunner* task_runner,
209 base::TimeTicks initial_vsync_timebase, 209 base::TimeTicks initial_vsync_timebase,
210 base::TimeDelta initial_vsync_interval); 210 base::TimeDelta initial_vsync_interval);
211 ~SyntheticBeginFrameSource() override; 211 ~SyntheticBeginFrameSource() override;
212 212
213 // Tracing 213 // Tracing
214 void AsValueInto(base::trace_event::TracedValue* dict) const override; 214 void AsValueInto(base::trace_event::TracedValue* dict) const override;
215 215
(...skipping 13 matching lines...) Expand all
229 229
230 // BeginFrameSourceMixIn 230 // BeginFrameSourceMixIn
231 void OnNeedsBeginFramesChange(bool needs_begin_frames) override; 231 void OnNeedsBeginFramesChange(bool needs_begin_frames) override;
232 232
233 scoped_refptr<DelayBasedTimeSource> time_source_; 233 scoped_refptr<DelayBasedTimeSource> time_source_;
234 }; 234 };
235 235
236 // A "virtual" frame source which lets you switch between multiple other frame 236 // A "virtual" frame source which lets you switch between multiple other frame
237 // sources while making sure the BeginFrameArgs stays increasing (possibly 237 // sources while making sure the BeginFrameArgs stays increasing (possibly
238 // enforcing minimum boundry between BeginFrameArgs messages). 238 // enforcing minimum boundry between BeginFrameArgs messages).
239 class CC_EXPORT BeginFrameSourceMultiplexer : public BeginFrameSourceMixIn, 239 class BeginFrameSourceMultiplexer : public BeginFrameSourceMixIn,
240 public BeginFrameObserver { 240 public BeginFrameObserver {
241 public: 241 public:
242 static scoped_ptr<BeginFrameSourceMultiplexer> Create(); 242 static scoped_ptr<BeginFrameSourceMultiplexer> Create();
243 ~BeginFrameSourceMultiplexer() override; 243 ~BeginFrameSourceMultiplexer() override;
244 244
245 void SetMinimumInterval(base::TimeDelta new_minimum_interval); 245 void SetMinimumInterval(base::TimeDelta new_minimum_interval);
246 246
247 void AddSource(BeginFrameSource* new_source); 247 void AddSource(BeginFrameSource* new_source);
248 void RemoveSource(BeginFrameSource* existing_source); 248 void RemoveSource(BeginFrameSource* existing_source);
249 void SetActiveSource(BeginFrameSource* new_source); 249 void SetActiveSource(BeginFrameSource* new_source);
250 const BeginFrameSource* ActiveSource(); 250 const BeginFrameSource* ActiveSource();
(...skipping 23 matching lines...) Expand all
274 274
275 base::TimeDelta minimum_interval_; 275 base::TimeDelta minimum_interval_;
276 276
277 BeginFrameSource* active_source_; 277 BeginFrameSource* active_source_;
278 std::set<BeginFrameSource*> source_list_; 278 std::set<BeginFrameSource*> source_list_;
279 }; 279 };
280 280
281 } // namespace cc 281 } // namespace cc
282 282
283 #endif // CC_SCHEDULER_BEGIN_FRAME_SOURCE_H_ 283 #endif // CC_SCHEDULER_BEGIN_FRAME_SOURCE_H_
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