Function makeTestImage

packages/test-utils/src/index.ts:71–97

(...args: string[])

/* Build a test image from a list of strings */
export function makeTestImage(...args: string[]) {
  const initialWidth = args[args.length - 1]?.length || 0;
  const testImage: Bitmap = {
    width: initialWidth,
    height: args.length,
    data: Buffer.alloc(initialWidth * args.length * 4),
  };

  for (let y = 0; y < testImage.height; y++) {
    const line = args[y]!;
    testImage.width = line.length;
    const w = testImage.width;

    for (let x = 0; x < w; x++) {
      const char = line[x]!;
      const color = colors[char];

      if (typeof color === "undefined") {
        throwUndefinedChar(char);
      } else {
        testImage.data.writeUInt32BE(color, 4 * (y * w + x));
      }
    }
  }

  return testImage;
}

const sup = "⁰¹²³⁴⁵⁶⁷⁸⁹ᵃᵇᶜᵈᵉᶠ";