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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 "config.h" | 5 #include "config.h" |
6 | 6 |
7 #include "CCFrameRateController.h" | 7 #include "CCFrameRateController.h" |
8 | 8 |
9 #include "base/logging.h" | |
10 #include "CCDelayBasedTimeSource.h" | 9 #include "CCDelayBasedTimeSource.h" |
11 #include "CCTimeSource.h" | 10 #include "CCTimeSource.h" |
12 #include "TraceEvent.h" | 11 #include "TraceEvent.h" |
13 #include <wtf/CurrentTime.h> | 12 #include <wtf/CurrentTime.h> |
14 | 13 |
15 namespace { | 14 namespace { |
16 | 15 |
17 // This will be the maximum number of pending frames unless | 16 // This will be the maximum number of pending frames unless |
18 // CCFrameRateController::setMaxFramesPending is called. | 17 // CCFrameRateController::setMaxFramesPending is called. |
19 const int defaultMaxFramesPending = 2; | 18 const int defaultMaxFramesPending = 2; |
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82 else { | 81 else { |
83 if (active) | 82 if (active) |
84 postManualTick(); | 83 postManualTick(); |
85 else | 84 else |
86 m_manualTicker->stop(); | 85 m_manualTicker->stop(); |
87 } | 86 } |
88 } | 87 } |
89 | 88 |
90 void CCFrameRateController::setMaxFramesPending(int maxFramesPending) | 89 void CCFrameRateController::setMaxFramesPending(int maxFramesPending) |
91 { | 90 { |
92 DCHECK(maxFramesPending > 0); | 91 ASSERT(maxFramesPending > 0); |
93 m_maxFramesPending = maxFramesPending; | 92 m_maxFramesPending = maxFramesPending; |
94 } | 93 } |
95 | 94 |
96 void CCFrameRateController::setTimebaseAndInterval(base::TimeTicks timebase, bas
e::TimeDelta interval) | 95 void CCFrameRateController::setTimebaseAndInterval(base::TimeTicks timebase, bas
e::TimeDelta interval) |
97 { | 96 { |
98 if (m_isTimeSourceThrottling) | 97 if (m_isTimeSourceThrottling) |
99 m_timeSource->setTimebaseAndInterval(timebase, interval); | 98 m_timeSource->setTimebaseAndInterval(timebase, interval); |
100 } | 99 } |
101 | 100 |
102 void CCFrameRateController::setSwapBuffersCompleteSupported(bool supported) | 101 void CCFrameRateController::setSwapBuffersCompleteSupported(bool supported) |
103 { | 102 { |
104 m_swapBuffersCompleteSupported = supported; | 103 m_swapBuffersCompleteSupported = supported; |
105 } | 104 } |
106 | 105 |
107 void CCFrameRateController::onTimerTick() | 106 void CCFrameRateController::onTimerTick() |
108 { | 107 { |
109 DCHECK(m_active); | 108 ASSERT(m_active); |
110 | 109 |
111 // Check if we have too many frames in flight. | 110 // Check if we have too many frames in flight. |
112 bool throttled = m_numFramesPending >= m_maxFramesPending; | 111 bool throttled = m_numFramesPending >= m_maxFramesPending; |
113 | 112 |
114 if (m_client) | 113 if (m_client) |
115 m_client->vsyncTick(throttled); | 114 m_client->vsyncTick(throttled); |
116 | 115 |
117 if (m_swapBuffersCompleteSupported && !m_isTimeSourceThrottling && m_numFram
esPending < m_maxFramesPending) | 116 if (m_swapBuffersCompleteSupported && !m_isTimeSourceThrottling && m_numFram
esPending < m_maxFramesPending) |
118 postManualTick(); | 117 postManualTick(); |
119 } | 118 } |
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132 void CCFrameRateController::didBeginFrame() | 131 void CCFrameRateController::didBeginFrame() |
133 { | 132 { |
134 if (m_swapBuffersCompleteSupported) | 133 if (m_swapBuffersCompleteSupported) |
135 m_numFramesPending++; | 134 m_numFramesPending++; |
136 else if (!m_isTimeSourceThrottling) | 135 else if (!m_isTimeSourceThrottling) |
137 postManualTick(); | 136 postManualTick(); |
138 } | 137 } |
139 | 138 |
140 void CCFrameRateController::didFinishFrame() | 139 void CCFrameRateController::didFinishFrame() |
141 { | 140 { |
142 DCHECK(m_swapBuffersCompleteSupported); | 141 ASSERT(m_swapBuffersCompleteSupported); |
143 | 142 |
144 m_numFramesPending--; | 143 m_numFramesPending--; |
145 if (!m_isTimeSourceThrottling) | 144 if (!m_isTimeSourceThrottling) |
146 postManualTick(); | 145 postManualTick(); |
147 } | 146 } |
148 | 147 |
149 void CCFrameRateController::didAbortAllPendingFrames() | 148 void CCFrameRateController::didAbortAllPendingFrames() |
150 { | 149 { |
151 m_numFramesPending = 0; | 150 m_numFramesPending = 0; |
152 } | 151 } |
153 | 152 |
154 base::TimeTicks CCFrameRateController::nextTickTime() | 153 base::TimeTicks CCFrameRateController::nextTickTime() |
155 { | 154 { |
156 if (m_isTimeSourceThrottling) | 155 if (m_isTimeSourceThrottling) |
157 return m_timeSource->nextTickTime(); | 156 return m_timeSource->nextTickTime(); |
158 | 157 |
159 return base::TimeTicks(); | 158 return base::TimeTicks(); |
160 } | 159 } |
161 | 160 |
162 } | 161 } |
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