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Fixes #19288 Adds the `ImageData` Web API. This would be beneficial to projects using `ImageData` as a convenient transport layer for pixel data. This is common in Web Assembly projects that manipulate images. Having this global available in Deno would improve compatibility of existing JS libraries. **References** - [MDN ImageData Web API](https://developer.mozilla.org/en-US/docs/Web/API/ImageData) - [whatwg HTML Standard Canvas Spec](https://html.spec.whatwg.org/multipage/canvas.html#pixel-manipulation)
53 lines
1.7 KiB
TypeScript
53 lines
1.7 KiB
TypeScript
// Copyright 2018-2023 the Deno authors. All rights reserved. MIT license.
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import { assertEquals } from "./test_util.ts";
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Deno.test(function imageDataInitializedWithSourceWidthAndHeight() {
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const imageData = new ImageData(16, 9);
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assertEquals(imageData.width, 16);
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assertEquals(imageData.height, 9);
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assertEquals(imageData.data.length, 16 * 9 * 4); // width * height * 4 (RGBA pixels)
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assertEquals(imageData.colorSpace, "srgb");
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});
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Deno.test(function imageDataInitializedWithImageDataAndWidth() {
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const imageData = new ImageData(new Uint8ClampedArray(16 * 9 * 4), 16);
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assertEquals(imageData.width, 16);
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assertEquals(imageData.height, 9);
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assertEquals(imageData.data.length, 16 * 9 * 4); // width * height * 4 (RGBA pixels)
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assertEquals(imageData.colorSpace, "srgb");
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});
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Deno.test(
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function imageDataInitializedWithImageDataAndWidthAndHeightAndColorSpace() {
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const imageData = new ImageData(new Uint8ClampedArray(16 * 9 * 4), 16, 9, {
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colorSpace: "display-p3",
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});
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assertEquals(imageData.width, 16);
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assertEquals(imageData.height, 9);
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assertEquals(imageData.data.length, 16 * 9 * 4); // width * height * 4 (RGBA pixels)
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assertEquals(imageData.colorSpace, "display-p3");
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},
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);
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Deno.test(
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async function imageDataUsedInWorker() {
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const { promise, resolve } = Promise.withResolvers<void>();
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const url = import.meta.resolve(
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"../testdata/workers/image_data_worker.ts",
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);
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const expectedData = 16;
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const worker = new Worker(url, { type: "module" });
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worker.onmessage = function (e) {
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assertEquals(expectedData, e.data);
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worker.terminate();
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resolve();
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};
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await promise;
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},
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);
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