async function createGifFromPngs()

in src/gif_maker/index.ts [33:72]

• 38 lines of code
• 3 McCabe index (conditional complexity)

async function createGifFromPngs(
  imageUrls: string[],
  targetWidth = 1024,
  targetHeight = 1024,
) {
  const canvas = document.createElement('canvas');
  const ctx = canvas.getContext('2d');
  if (!ctx) {
    throw new Error('Failed to create canvas context');
  }
  const gif = GIFEncoder();
  const fpsInterval = 1 / fps;
  const delay = fpsInterval * 1000;

  for (const url of imageUrls) {
    const img = new Image();
    img.src = url;
    await new Promise((resolve) => {
      img.onload = resolve;
    });
    canvas.width = targetWidth;
    canvas.height = targetHeight;
    ctx.fillStyle = '#ffffff';
    ctx.clearRect(0, 0, targetWidth, targetHeight);
    ctx.drawImage(img, 0, 0, targetWidth, targetHeight);
    const data = ctx.getImageData(0, 0, targetWidth, targetHeight).data;
    const format = 'rgb444';
    const palette = quantize(data, 256, {format});
    const index = applyPalette(data, palette, format);
    gif.writeFrame(index, targetWidth, targetHeight, {palette, delay});
  }

  gif.finish();
  const buffer = gif.bytesView();
  const blob = new Blob([buffer], {type: 'image/gif'});
  const url = URL.createObjectURL(blob);
  const img = new Image();
  img.src = url;
  return img;
}