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Add frames into style system and update animation with frames functions.

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This commit is contained in:
Boris Chiou 2017-03-06 16:28:44 +08:00
parent 18c72ac28d
commit f1feddf52c
4 changed files with 57 additions and 5 deletions
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8
components/style/animation.rs
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@ -352,6 +352,14 @@ impl PropertyAnimation {
TransitionTimingFunction::Steps(steps, StartEnd::End) => {
(time * (steps as f64)).floor() / (steps as f64)
}
TransitionTimingFunction::Frames(frames) => {
// https://drafts.csswg.org/css-timing/#frames-timing-functions
let mut out = (time * (frames as f64)).floor() / ((frames - 1) as f64);
if out > 1.0 && time <= 1.0 {
out = 1.0;
}
out
}
};
self.property.update(style, progress);