111 lines
3.4 KiB
HTML
111 lines
3.4 KiB
HTML
<!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=edge">
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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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body {
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margin: 0;
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padding: 0;
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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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<canvas id=anim width=1000 height=1000 style="height: 1000px; width: 1000px;"></canvas>
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</main>
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<script type="text/javascript" charset="utf-8">
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const WIDTH = 1000;
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const HEIGHT = 1000;
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const LOTTIE_JSON_PATH = '/res/lottie.json';
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const MAX_FRAMES = 25;
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const MAX_LOOPS = 25;
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const MAX_SAMPLE_MS = 60*1000; // in case something takes a while, stop after 60 seconds.
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(function() {
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const loadKit = CanvasKitInit({
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locateFile: (file) => '/res/' + file,
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});
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const loadLottie = fetch(LOTTIE_JSON_PATH).then((resp) => {
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return resp.text();
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});
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Promise.all([loadKit, loadLottie]).then((values) => {
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const [CanvasKit, json] = values;
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const animation = CanvasKit.MakeManagedAnimation(json, null);
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if (!animation) {
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window._error = 'Could not process JSON';
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return
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}
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let surface = null;
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if (window.location.hash.indexOf('gpu') !== -1) {
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surface = CanvasKit.MakeWebGLCanvasSurface('anim');
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if (!surface) {
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window._error = 'Could not make GPU surface';
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return;
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}
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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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if (c.classList.contains('ck-replaced')) {
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window._error = 'fell back to CPU';
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return;
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}
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} else {
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surface = CanvasKit.MakeSWCanvasSurface('anim');
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if (!surface) {
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window._error = 'Could not make CPU surface';
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return;
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}
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}
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const canvas = surface.getCanvas();
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const t_rate = 1.0 / (MAX_FRAMES-1);
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let seek = 0;
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let frame = 0;
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let loop = 0;
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const damageRect = Float32Array.of(0, 0, 0, 0);
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const bounds = CanvasKit.LTRBRect(0, 0, WIDTH, HEIGHT);
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const start = performance.now();
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const drawFrame = () => {
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if ((performance.now() - start) > MAX_SAMPLE_MS) {
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// This global variable signals we are done.
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window._skottieDone = true;
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return;
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}
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if (frame >= MAX_FRAMES) {
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// Reached the end of one loop.
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loop++;
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if (loop == MAX_LOOPS) {
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// This global variable signals we are done.
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window._skottieDone = true;
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return;
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}
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// Reset frame and seek to restart the loop.
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frame = 0;
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seek = 0;
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}
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let damage = animation.seek(seek, damageRect);
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if (damage[2] > damage[0] && damage[3] > damage[1]) {
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animation.render(canvas, bounds);
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surface.flush();
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}
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console.log(`Used seek: ${seek}`);
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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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})();
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</script>
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</body>
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</html>
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