blob: 66929ff3a54ad422db6e0478cc238f47e5eb7e15 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
|
export class RenderBalancer {
previousTimestamp = undefined;
constructor({ increase, decrease, highFrameTime, lowFrameTime }) {
this.increase = increase;
this.decrease = decrease;
this.highFrameTime = highFrameTime;
this.lowFrameTime = lowFrameTime;
}
render(fn) {
return new Promise((resolve) => {
const callback = (timestamp) => {
this.throttle(timestamp);
if (fn()) requestAnimationFrame(callback);
else resolve();
};
requestAnimationFrame(callback);
});
}
throttle(timestamp) {
const { previousTimestamp } = this;
this.previousTimestamp = timestamp;
if (previousTimestamp === undefined) return;
const duration = Math.round(timestamp - previousTimestamp);
if (!duration) return;
if (duration >= this.highFrameTime) {
this.decrease();
} else if (duration < this.lowFrameTime) {
this.increase();
}
}
}
|
