19 lines
610 B
TypeScript
19 lines
610 B
TypeScript
import * as thumbhash from "https://esm.sh/thumbhash@0.1.1";
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export function generateThumbhash(buffer: Uint8Array, w: number, h: number) {
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const hash = thumbhash.rgbaToThumbHash(w, h, buffer);
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return [hash, thumbhash.thumbHashToAverageRGBA(hash)] as const;
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}
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export function generateDataURL(hash: string) {
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const decodedString = atob(hash);
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// Create Uint8Array from decoded string
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const uint8Array = new Uint8Array(decodedString.length);
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for (let i = 0; i < decodedString.length; i++) {
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uint8Array[i] = decodedString.charCodeAt(i);
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}
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return thumbhash.thumbHashToDataURL(uint8Array);
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}
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