UDL_CMD_MAX_PIXEL_COUNT
static const uint8_t udl_black[UDL_CMD_MAX_PIXEL_COUNT * 2] __aligned(4);
if (delta > UDL_CMD_MAX_PIXEL_COUNT * 2)
delta = UDL_CMD_MAX_PIXEL_COUNT * 2;
if (delta > UDL_CMD_MAX_PIXEL_COUNT * 2)
delta = UDL_CMD_MAX_PIXEL_COUNT * 2;