Re: X.org on Amiga, 16 color mode

[Jukka Andberg <jukka.andberg%welho.com@localhost>]

Frank Wille wrote Sat, 02 Mar 2024 12:24:38 +0100:
> Jukka Andberg wrote:
> 
> > Working solution seems to be creating the shadowfb with 8bpp and
> > depth 4, and then handling conversion from 8bpp pixels to 4
> > bitplanes in the shadow update function.
> >
> > For the conversion it needs a new shadow update function, which is
> > pretty similar to existing shadowUpdateAfb4, just reading 8-bit
> > input pixels instead of 4-bit pixels.
> >
> > Patch attached. Any thoughts?
> 
> I think this could work. Nice work!
> 
> Maybe it makes sense to optimize at least the inner loop of the
> shadowUpdateAfb4x8() routine into assembler, once it works.

Maybe something to check, yes.

Performance-wise there seems to be also something else in the new
server that makes it slower than Xamiga, even with the existing
black/white solution a simple thing like moving the mouse pointer
feels slower.

--jukka