49 lines
1.7 KiB
JavaScript
49 lines
1.7 KiB
JavaScript
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import sharp from 'sharp';
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import decodeIco from 'decode-ico';
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import decodeBmp from 'decode-bmp';
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import { readFile } from 'node:fs/promises';
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export async function sharpBmp(source, type, options = {}) {
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if (type === 'image/x-icon' || type === 'image/vnd.microsoft.icon') {
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const icon = decodeIco(typeof source === 'string' ? await readFile(source, { encoding: null }) : source);
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// Choose the largest icon
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const chosen = icon.reduce((prev, curr) => {
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const prevSize = prev.width * prev.height;
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const currSize = curr.width * curr.height;
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if (prevSize < currSize) {
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// Larger icon
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return curr;
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}
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else if (prevSize === currSize && curr.type === 'png') {
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// PNG is preferred over BMP
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return curr;
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}
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return prev;
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}, icon[0]);
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if (chosen.type === 'png') {
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return sharp(chosen.data, options);
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}
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else {
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return sharp(chosen.data, {
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...options,
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raw: {
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width: chosen.width,
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height: chosen.height,
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channels: 4,
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},
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});
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}
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}
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if (type === 'image/x-bmp' || type === 'image/bmp' || type === 'image/x-ms-bmp') {
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const bmp = decodeBmp(typeof source === 'string' ? await readFile(source, { encoding: null }) : source);
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return sharp(bmp.data, {
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...options,
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raw: {
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width: bmp.width,
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height: bmp.height,
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channels: 4,
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},
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});
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}
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return sharp(source, options);
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}
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