2019-06-14 17:51:09 +00:00
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<!DOCTYPE html>
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<html>
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<head>
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<title>Skottie-WASM Perf</title>
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<meta charset="utf-8" />
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<meta http-equiv="X-UA-Compatible" content="IE=egde,chrome=1">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<script src="res/canvaskit.js" type="text/javascript" charset="utf-8"></script>
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<style type="text/css" media="screen">
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2019-06-24 18:47:25 +00:00
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body {
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margin: 0;
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padding: 0;
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2019-06-14 17:51:09 +00:00
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}
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</style>
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</head>
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<body>
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<main>
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2019-06-24 18:47:25 +00:00
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<canvas id=anim width=1000 height=1000 style="height: 1000px; width: 1000px;"></canvas>
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2019-06-14 17:51:09 +00:00
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</main>
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<script type="text/javascript" charset="utf-8">
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(function() {
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const PATH = '/res/lottie.json';
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let lottieJSON = null;
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let CK = null;
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CanvasKitInit({
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locateFile: (file) => '/res/'+file,
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}).ready().then((CanvasKit) => {
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CK = CanvasKit;
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Bench(CK, lottieJSON);
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});
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fetch(PATH).then((resp) => {
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resp.text().then((json) => {
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lottieJSON = json;
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Bench(CK, lottieJSON);
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});
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});
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})();
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// Without flushing, nothing will show up on the screen, although
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// everything else has been executed.
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const shouldFlush = false;
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const frames = 25;
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function Bench(CK, json) {
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if (!CK || !json) {
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return;
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}
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const animation = CK.MakeManagedAnimation(json, null);
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if (!animation) {
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console.error('Could not process JSON');
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return
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}
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const surface = CK.MakeCanvasSurface("anim");
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if (!surface) {
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console.error('Could not make surface');
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return;
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}
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const canvas = surface.getCanvas();
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let c = document.getElementById('anim');
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// If CanvasKit was unable to instantiate a WebGL context, it will fallback
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// to CPU and add a ck-replaced class to the canvas element.
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window._gpu = CK.gpu && !c.classList.contains('ck-replaced');
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2019-06-24 18:47:25 +00:00
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const t_rate = 1.0 / (frames-1);
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2019-06-14 17:51:09 +00:00
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let seek = 0;
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let frame = 0;
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const drawFrame = () => {
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if (frame >= frames) {
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// These are global variables to talk with puppeteer.
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window._skottieDone = true;
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return;
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}
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2019-06-24 18:47:25 +00:00
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2019-06-14 17:51:09 +00:00
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animation.seek(seek);
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2019-06-24 18:47:25 +00:00
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animation.render(canvas, {
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fLeft: 0,
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fTop: 0,
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fRight: 1000,
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fBottom: 1000
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});
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2019-06-14 17:51:09 +00:00
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if (shouldFlush) {
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surface.flush();
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}
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seek += t_rate;
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frame++;
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window.requestAnimationFrame(drawFrame);
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};
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window.requestAnimationFrame(drawFrame);
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}
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</script>
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</body>
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</html>
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