void LayerTreeHostGtk::layerFlushTimerFired()
{
double fireTime = monotonicallyIncreasingTime();
flushAndRenderLayers();
if (m_layerFlushTimerCallback.isScheduled() || !toTextureMapperLayer(m_rootLayer.get())->descendantsOrSelfHaveRunningAnimations())
return;
static const double targetFramerate = 1 / 60.0;
// When rendering layers takes more time than the target delay (0.016), we end up scheduling layer flushes
// immediately. Since the layer flush timer has a higher priority than WebCore timers, these are never
// fired while we keep scheduling layer flushes immediately.
double current = monotonicallyIncreasingTime();
double timeToNextFlush = std::max(targetFramerate - (current - fireTime), 0.0);
if (timeToNextFlush)
m_lastImmediateFlushTime = 0;
else if (!m_lastImmediateFlushTime)
m_lastImmediateFlushTime = current;
if (shouldSkipNextFrameBecauseOfContinousImmediateFlushes(current, m_lastImmediateFlushTime)) {
timeToNextFlush = targetFramerate;
m_lastImmediateFlushTime = 0;
}
// Modified by ZRL for compiling
#if 0
m_layerFlushTimerCallback.scheduleAfterDelay("[WebKit] layerFlushTimer", std::bind(&LayerTreeHostGtk::layerFlushTimerFired, this),
std::chrono::duration_cast<std::chrono::microseconds>(std::chrono::duration<double>(timeToNextFlush)), layerFlushTimerPriority);
#else
std::function<void ()> fp = std::bind(&LayerTreeHostGtk::layerFlushTimerFired, this);
m_layerFlushTimerCallback.scheduleAfterDelay("[WebKit] layerFlushTimer", fp,
std::chrono::duration_cast<std::chrono::microseconds>(std::chrono::duration<double>(timeToNextFlush)), layerFlushTimerPriority);
#endif
}
void LayerTreeHostGtk::RenderFrameScheduler::nextFrame()
{
static const double targetFramerate = 1 / 60.0;
// When rendering layers takes more time than the target delay (0.016), we end up scheduling layer flushes
// immediately. Since the layer flush timer has a higher priority than WebCore timers, these are never
// fired while we keep scheduling layer flushes immediately.
double current = monotonicallyIncreasingTime();
double timeToNextFlush = std::max(targetFramerate - (current - m_fireTime), 0.0);
if (timeToNextFlush)
m_lastImmediateFlushTime = 0;
else if (!m_lastImmediateFlushTime)
m_lastImmediateFlushTime = current;
if (shouldSkipNextFrameBecauseOfContinousImmediateFlushes(current, m_lastImmediateFlushTime)) {
timeToNextFlush = targetFramerate;
m_lastImmediateFlushTime = 0;
}
m_timer.startOneShot(timeToNextFlush);
}
