blitzkit/src/core/blitzrinth/iconPng.ts

import sharp from 'sharp';

const cache: Record<string, Buffer> = {};

export async function webpToPng(url: string) {
  if (!url.endsWith('.webp')) return url;

  if (!cache[url]) {
    const imageResponse = await fetch(url);
    const imageBufferWEBP = await imageResponse.arrayBuffer();
    const imageBufferPNG = await sharp(imageBufferWEBP).png().toBuffer();
    cache[url] = imageBufferPNG;
  }

  return `data:image/png;base64,${cache[url].toString('base64')}`;
}