// Keep one world block square in the image, including rectangular exports.
// Eight pixels per block preserves the vanilla textures in typical 128-block
// exports; large worlds are capped to a manageable image size.
export function mapDimensions(bounds) {
  const spanX = bounds.maxX - bounds.minX;
  const spanZ = bounds.maxZ - bounds.minZ;
  if (
    !Number.isInteger(spanX) ||
    !Number.isInteger(spanZ) ||
    spanX < 1 ||
    spanZ < 1
  )
    throw new Error("Surface map bounds must have a positive integer size");
  const scale = Math.min(8, 2048 / Math.max(spanX, spanZ));
  return {
    width: Math.max(1, Math.round(spanX * scale)),
    height: Math.max(1, Math.round(spanZ * scale)),
  };
}