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ui: Frame skip on JS

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This commit is contained in:
Hajime Hoshi 2015-02-21 22:19:26 +09:00
parent 5e5eea59ce
commit 246ac055bf
1 changed files with 14 additions and 4 deletions
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18
internal/ui/ui_js.go
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@ -78,11 +78,21 @@ func shown() bool {
func vsync() {
ch := make(chan struct{})
// TODO: In iOS8, this is called at every 1/30[sec] frame.
// Can we use DOMHighResTimeStamp?
js.Global.Get("window").Call("requestAnimationFrame", func() {
// As the performance is generally not good with GopehrJS, consume n 'requestAnimationFrame's
// each time.
n := 2
var l func()
l = func() {
if 0 < n {
n--
// TODO: In iOS8, this is called at every 1/30[sec] frame.
// Can we use DOMHighResTimeStamp?
js.Global.Get("window").Call("requestAnimationFrame", l)
return
}
close(ch)
})
}
l()
<-ch
}