31 lines
708 B
JavaScript
31 lines
708 B
JavaScript
// @ts-check
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import { GifNodeType } from "./constants.js";
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/** @typedef {import("../../types/gif.d.ts").GifNode} GifNode */
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/**
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* @param {Uint8Array} bytes
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* @returns {null | GifNode} The root node of the PNG tree, or null if the PNG is invalid.
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*/
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export default (bytes) => {
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/** @type {GifNode[]} */
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const children = [
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{
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type: GifNodeType.header,
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bytes: bytes.subarray(0, 6),
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children: [
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{
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type: GifNodeType.headerSignature,
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bytes: bytes.subarray(0, 3),
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},
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{
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type: GifNodeType.headerVersion,
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bytes: bytes.subarray(3, 6),
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},
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],
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},
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];
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return { type: GifNodeType.root, bytes, children };
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};
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