On Tue, Jan 04, 2005 at 04:32:47PM -0600, Larson, Tim (Corporate) wrote:
> Is it possible to use nonstandard bit depths in X11 in general, and
> the mac68k color X server specifically?  I've got machines with 512kB
> VRAM, which should theoretically support 640x480x13, if 13-bit color
> is possible.  I've always wondered if the restrictions to 4-, 8-, 16-,
> 24-, and 32-bit depths was arbitrary or some limitation inherent in an
> algorithm used somewhere.  It would be kind of neat to squeeze more
> color out of the machine than was capable with the MacOS.

I doubt the video hardware is even capable of 13-bit color.  I've only
ever seen 1, 2, 4, 8, 16, and 24 bit depths, with 1-8 bits being
palettized.

13 bits would be a pain unless the CPU in question could either access
data on 13 bit boundaries natively, or the memory was "sparse" and had a
16-bit stride.  (most 24-bit modes have a 32-bit stride)

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