Very Computer

by **Barry D Benowit** » Tue, 05 Nov 1996 04:00:00

I have been playing with 16 bit colors but I haven't got a jpeg that
will show me more that 256 colors. Can anyone give me a pointer to
one. So far I have seen nothing that would say I get a benefit to
running X in 16 bpp mode.

--
Barry D. Benowitz - FAQ maintainer for alt.lefthanders

Phone:+1 609 866 1000 x354
Snail:Securicor Telesciences Inc, 351 New Albany Rd, Moorestown, NJ, 08057-1177

by **Clyde Coff** » Wed, 06 Nov 1996 04:00:00

Quote:>I have been playing with 16 bit colors but I haven't got a jpeg that
>will show me more that 256 colors. Can anyone give me a pointer to
>one. So far I have seen nothing that would say I get a benefit to
>running X in 16 bpp mode.

All jpegs should unpack into 24-bit color, even if they are converted
GIF's. 16bpp always has the advantage that if won't run out of colors.
Try running in psuedo-color mode and then running a few graphical apps
and a few XPM backgrounds. Pretty soon, nothing works right.

by **Guido Vollbedin** » Wed, 06 Nov 1996 04:00:00

> I have been playing with 16 bit colors but I haven't got a jpeg that
> will show me more that 256 colors. Can anyone give me a pointer to
> one.

Hmm, color JPEGs are always 24 bit True-Color.
But you might notice some color banding artifacts in 16 bit mode with
certain images (example:
http://www.esc.de/digifoto/land_jpg/monument.jpg).

Quote:> So far I have seen nothing that would say I get a benefit to
> running X in 16 bpp mode.

There *are* significant benefits, but also some odds as mentioned.
But I have a solution for that so you won't complain about the given
example. See http://www.esc.de/homes/guivol/fixpix/

For people who know this already: There is a new release (Nov 02)
which fixes bugs on platforms with 'strange' visual lists.

Regards,
Guido