a1e30a3a28
Also add some explanation to the image_sampling demo. Change-Id: Id20fe4d47c45b6a6b27e227871458bb862ec83d8 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/378936 Reviewed-by: Mike Reed <reed@google.com>
55 lines
2.0 KiB
JavaScript
55 lines
2.0 KiB
JavaScript
importScripts('https://unpkg.com/canvaskit-wasm@0.25.0/bin/full/canvaskit.js');
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importScripts('shared.js');
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const CanvasKitPromise =
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CanvasKitInit({locateFile: (file) => 'https://unpkg.com/canvaskit-wasm@0.25.0/bin/full/'+file});
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const path2dAnimator = new Animator();
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const canvasKitAnimator = new Animator();
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addEventListener('message', async ({ data: {svgData, offscreenCanvas, type, switchMethod} }) => {
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// The worker expect to receive 2 messages after initialization: One with an offscreenCanvas
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// for Path2D rendering, and one with an offscreenCanvas for CanvasKit rendering.
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if (svgData && offscreenCanvas && type) {
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if (type === 'Path2D') {
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path2dAnimator.renderer =
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new Path2dRenderer(svgData, offscreenCanvas);
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}
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if (type === 'CanvasKit') {
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const CanvasKit = await CanvasKitPromise;
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canvasKitAnimator.renderer =
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new CanvasKitRenderer(svgData, offscreenCanvas, CanvasKit);
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}
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}
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// The worker receives a "switchMethod" message whenever the user clicks a rendering
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// method button on the web page.
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if (switchMethod) {
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// Pause other renderers and start correct renderer
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canvasKitAnimator.stop();
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path2dAnimator.stop();
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if (switchMethod === 'Path2D') {
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path2dAnimator.start();
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} else if (switchMethod === 'CanvasKit') {
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canvasKitAnimator.start();
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}
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}
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});
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// Report framerates of Path2D and CanvasKit rendering back to main.js
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setInterval(() => {
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if (path2dAnimator.framesCount > 0) {
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postMessage({
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renderMethod: 'Path2D',
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framesCount: path2dAnimator.framesCount,
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totalFramesMs: path2dAnimator.totalFramesMs
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});
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}
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if (canvasKitAnimator.framesCount > 0) {
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postMessage({
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renderMethod: 'CanvasKit',
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framesCount: canvasKitAnimator.framesCount,
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totalFramesMs: canvasKitAnimator.totalFramesMs
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});
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}
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}, 1000);
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