42 lines
1006 B
JavaScript
42 lines
1006 B
JavaScript
// @ts-check
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import fs from "node:fs";
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import * as codecs from "@astropub/codecs";
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const resizedImages = new Map();
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export const getLoadedImage = async (src, ext) => {
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const buffer = fs.readFileSync(src);
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const image = await codecs[ext].decode(buffer);
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const { width } = image;
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const resizedImageKey = `${src}@${image.width}`;
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resizedImages.set(resizedImageKey, image);
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return { image, width };
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};
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export const getTransformedImage = async ({ src, image, config, type }) => {
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const { width, format, quality } = config;
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const resizedImageKey = `${src}@${width}`;
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const resizedImage =
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resizedImages.get(resizedImageKey) ||
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resizedImages
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.set(resizedImageKey, await image.resize({ width }))
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.get(resizedImageKey);
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const encodedImage = quality
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? await codecs[format].encode(resizedImage, {
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quality: parseInt(quality),
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})
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: await resizedImage.encode(type);
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const buffer = Buffer.from(encodedImage.data);
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return { image, buffer };
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};
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