I am trying to add video into Fabric.js , And i'm done with that.
But one question :
How to stop or cancel requestAnimFrame()
?
Example :
var canvas = new fabric.Canvas('c');
var videoEl = document.getElementById('video');
var video = new fabric.Image(videoEl);
canvas.add(video);
video.getElement().play();
fabric.util.requestAnimFrame(function render() {
canvas.renderAll();
fabric.util.requestAnimFrame(render);
var current_time = videoEl.currentTime;
if(current_time >= 5) {
videoEl.pause();
console.log(current_time);
}
});
https://jsfiddle.net/l2aelba/kro7h6rv/
This is the video will stop after 5 secs. And I will stop/cancel requestAnimFrame
Causes high CPU load
I got it now : cancelRequestAnimFrame()
window.cancelRequestAnimFrame = (function(){
return window.cancelAnimationFrame ||
window.webkitCancelRequestAnimationFrame ||
window.mozCancelRequestAnimationFrame ||
window.oCancelRequestAnimationFrame ||
window.msCancelRequestAnimationFrame ||
clearTimeout
})();
var canvas = new fabric.Canvas('c');
var videoEl = document.getElementById('video');
var video = new fabric.Image(videoEl);
canvas.add(video);
video.getElement().play();
var request;
var render = function() {
canvas.renderAll();
request = fabric.util.requestAnimFrame(render);
var current_time = videoEl.currentTime;
if(current_time >= 5) {
videoEl.pause();
cancelRequestAnimFrame(request); <--- This
}
}
videoEl.play();
fabric.util.requestAnimFrame(render);
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