On Fri, Oct 09, 2026 at 09:41:37AM -0600, Ted Bullock wrote:
> Here is your version with unsigned colours and the pixel pair order adjusted
> for both CPU byte order and RI_BSWAP. The existing drawing loops are unchanged.

This looks correct, but we are missing a preprocessor #if :

> +	/* A byte swapped framebuffer reverses the two pixels together. */
> +	first_high = BYTE_ORDER == BIG_ENDIAN;

#if NRASOPS_BSWAP > 0

> +	if (ri->ri_flg & RI_BSWAP)
> +		first_high = !first_high;

#endif