spine-ts/spine-canvaskit/example/micro-benchmark.html

<!DOCTYPE html>
<html>

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <link rel="stylesheet" href="../../index.css">
    <script src="https://unpkg.com/canvaskit-wasm@latest/bin/canvaskit.js"></script>
    <script src="../dist/iife/spine-canvaskit.js"></script>
    <style>
        * {
            margin: 0;
            padding: 0;
        }
    </style>
</head>

<body class="p-4 flex flex-col items-center">
    <h1>Micro Benchmark</h1>
    <div id="timing"></div>
    <canvas id=foo style="margin: 0 auto; width: 600px; height: 400px;"></canvas>
</body>

<script type="module">
    async function readFile(path) {
        const response = await fetch(path);
        if (!response.ok) throw new Error("Could not load file " + path);
        return await response.arrayBuffer();
    }

    const canvasElement = document.querySelector("#foo");
    const dpr = window.devicePixelRatio || 1;
    canvasElement.width = canvasElement.clientWidth * dpr;
    canvasElement.height = canvasElement.clientHeight * dpr;

    const ck = await CanvasKitInit();
    const surface = ck.MakeCanvasSurface('foo');
    surface.getCanvas().scale(dpr, dpr);

    const atlas = await spine.loadTextureAtlas(ck, "assets/spineboy.atlas", readFile);
    const skeletonData = await spine.loadSkeletonData("assets/spineboy-pro.skel", atlas, readFile);

    // Instantiate 100 drawables, randomly placed and scaled.
    const drawables = [];
    for (let i = 0; i < 100; i++) {
        const drawable = new spine.SkeletonDrawable(skeletonData);
        drawable.skeleton.scaleX = drawable.skeleton.scaleY = 0.1 + Math.random() * 0.4;
        drawable.skeleton.x = Math.random() * 600;
        drawable.skeleton.y = Math.random() * 400;
        drawable.animationState.setAnimation(0, "walk", true);

        drawables.push(drawable);
    }

    const timingElement = document.querySelector("#timing");
    const renderer = new spine.SkeletonRenderer(ck);
    let lastTime = performance.now();
    function drawFrame(canvas) {
        canvas.clear(ck.Color(52, 52, 54, 1));

        const now = performance.now();
        const deltaTime = (now - lastTime) / 1000;
        lastTime = now;

        // Render all drawables
        for (let i = 0; i < drawables.length; i++) {
            const drawable = drawables[i];
            drawable.update(deltaTime);
            renderer.render(canvas, drawable);
        }

        surface.requestAnimationFrame(drawFrame);
        timingElement.textContent = (deltaTime * 1000).toFixed(0) + "ms/frame";
    }
    surface.requestAnimationFrame(drawFrame);
</script>

</html>