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loop: Early exit when no frame needs to be updated

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This commit is contained in:
Hajime Hoshi 2017-07-11 00:36:43 +09:00
parent fdaf03b209
commit 40ae782a67
1 changed files with 4 additions and 0 deletions
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4
internal/loop/run.go
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@ -167,10 +167,14 @@ func (c *runContext) render(g GraphicsContext) error {
// Note that generally t is a little different from 1/60[sec]. // Note that generally t is a little different from 1/60[sec].
t := n - c.lastUpdated t := n - c.lastUpdated
if t < 0 {
return nil
}
tt := int(t * int64(fps) / int64(time.Second)) tt := int(t * int64(fps) / int64(time.Second))
// As t is not accurate 1/60[sec], errors are accumulated. // As t is not accurate 1/60[sec], errors are accumulated.
// To make the FPS stable, set tt 1 if t is a little less than 1/60[sec]. // To make the FPS stable, set tt 1 if t is a little less than 1/60[sec].
// TODO: Better stabilizing way for FPS
if tt == 0 && (int64(time.Second)/int64(fps)-int64(5*time.Millisecond)) < t { if tt == 0 && (int64(time.Second)/int64(fps)-int64(5*time.Millisecond)) < t {
tt = 1 tt = 1
} }