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Tweak frame timing to avoid overloading the main thread

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This commit is contained in:
Brad Davis 2017-07-07 13:56:28 -07:00
parent 7e9ea596a0
commit 148eece065
1 changed files with 26 additions and 41 deletions
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67
interface/src/Application.cpp
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@ -2729,56 +2729,41 @@ bool Application::importSVOFromURL(const QString& urlString) {
return true;
}
bool _renderRequested { false };
bool Application::event(QEvent* event) {
if (!Menu::getInstance()) {
return false;
}
// Presentation/painting logic
// TODO: Decouple presentation and painting loops
static bool isPaintingThrottled = false;
if ((int)event->type() == (int)Present) {
if (isPaintingThrottled) {
// If painting (triggered by presentation) is hogging the main thread,
// repost as low priority to avoid hanging the GUI.
// This has the effect of allowing presentation to exceed the paint budget by X times and
// only dropping every (1/X) frames, instead of every ceil(X) frames
// (e.g. at a 60FPS target, painting for 17us would fall to 58.82FPS instead of 30FPS).
removePostedEvents(this, Present);
postEvent(this, new QEvent(static_cast<QEvent::Type>(Present)), Qt::LowEventPriority);
isPaintingThrottled = false;
int type = event->type();
switch (type) {
case Event::Lambda:
static_cast<LambdaEvent*>(event)->call();
return true;
}
float nsecsElapsed = (float)_lastTimeUpdated.nsecsElapsed();
if (shouldPaint(nsecsElapsed)) {
_lastTimeUpdated.start();
idle(nsecsElapsed);
postEvent(this, new QEvent(static_cast<QEvent::Type>(Paint)), Qt::HighEventPriority);
}
isPaintingThrottled = true;
case Event::Present:
if (!_renderRequested) {
float nsecsElapsed = (float)_lastTimeUpdated.nsecsElapsed();
if (shouldPaint(nsecsElapsed)) {
_renderRequested = true;
_lastTimeUpdated.start();
idle(nsecsElapsed);
postEvent(this, new QEvent(static_cast<QEvent::Type>(Paint)), Qt::HighEventPriority);
}
}
return true;
return true;
} else if ((int)event->type() == (int)Paint) {
// NOTE: This must be updated as close to painting as possible,
// or AvatarInputs will mysteriously move to the bottom-right
AvatarInputs::getInstance()->update();
case Event::Paint:
// NOTE: This must be updated as close to painting as possible,
// or AvatarInputs will mysteriously move to the bottom-right
AvatarInputs::getInstance()->update();
paintGL();
_renderRequested = false;
return true;
paintGL();
isPaintingThrottled = false;
return true;
} else if ((int)event->type() == (int)Idle) {
float nsecsElapsed = (float)_lastTimeUpdated.nsecsElapsed();
idle(nsecsElapsed);
return true;
}
if ((int)event->type() == (int)Lambda) {
static_cast<LambdaEvent*>(event)->call();
return true;
default:
break;
}
{