24 lines
711 B
TypeScript
24 lines
711 B
TypeScript
import sharp from "sharp";
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/**
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* Convert any [ArrayBuffer] containing image data to an [avif] [Blob].
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* Also allows downscaling and lossy compression.
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* Set either [width] or [height] to downscale while keeping the aspect ratio.
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*/
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export const image_to_avif = async (
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data: ArrayBuffer,
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width: number | undefined = undefined,
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height: number | undefined = undefined,
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quality: number = 50,
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effort: number = 4,
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): Promise<Blob> => {
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const compressed: Buffer = await sharp(data)
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.resize(width, height)
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.avif({ quality: quality, effort: effort })
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.toBuffer();
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console.log(`image_to_avif: ${data.byteLength} Bytes -> ${compressed.length} Bytes`);
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return new Blob([compressed]);
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};
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