Function rgb565ToDataUrl

app.js:903–929

(w, h, rgb565)

}

function rgb565ToDataUrl(w, h, rgb565) {
  const canvas = document.createElement("canvas");
  canvas.width = w;
  canvas.height = h;
  const ctx = canvas.getContext("2d");
  const img = ctx.createImageData(w, h);
  const d = img.data;

  const total = Math.min(rgb565.length, w * h);
  for (let p = 0; p < total; p++) {
    const v = rgb565[p] & 0xffff;
    const r5 = (v >> 11) & 0x1f;
    const g6 = (v >> 5) & 0x3f;
    const b5 = v & 0x1f;
    const r = (r5 << 3) | (r5 >> 2);
    const g = (g6 << 2) | (g6 >> 4);
    const b = (b5 << 3) | (b5 >> 2);
    const i = p * 4;
    d[i] = r;
    d[i + 1] = g;
    d[i + 2] = b;
    d[i + 3] = 255;
  }

  ctx.putImageData(img, 0, 0);
  return canvas.toDataURL("image/png");
}

function importRgb565ImageToDisplayKit({ symbol, w, h, rgb565 }) {
  if (!Array.isArray(rgb565) || !rgb565.length) {