ruilin

int clamp(int val) {
  if (val < 0) return 0;
  if (val > 255) return 255;
  return val;
}

unsigned char layerMerge(unsigned char **layers, unsigned int layerCount, unsigned int layerWidth, unsigned int layerHeight) {
	if (1 >= layerCount) return 0;
	unsigned char isNewLayer = 0;
	unsigned int i, j, byteCount;