Video 62 shade of grey, 3x 6bits: 18bits

[felix]

Dears,

Thanks for your suggestion, sorry for this late answer...

Yes, 16 (5+6+5)bits instead of 18 (6+6+6)bits seem acceptable!

Unfortunately, this don't work: I think I have an Endianness problem.
For who's interested, I've posted some photos of resulted screen here:

  DefaultDepth 16
    Raspberry-PI LXDE with ``temple.jpg'' as background, 
    https://f-hauri.ch/vrac/G121XN01/rpi-G121XN01-lxde_temple-16.jpg

    Gimp showing ``temple.jpg'' editing ``Colors Levels'' ouput -> 0 - 63
    https://f-hauri.ch/vrac/G121XN01/rpi-G121XN01-gimp-16.jpg

  DefaultDepth 24
    Raspberry-PI LXDE with ``temple.jpg'' as background,
    https://f-hauri.ch/vrac/G121XN01/rpi-G121XN01-lxde_temple-24.jpg

    Gimp showing ``temple.jpg'' editing ``Colors Levels'' ouput -> 0 - 63
    https://f-hauri.ch/vrac/G121XN01/rpi-G121XN01-gimp-24.jpg

Nota: Due to antialias, text are very hard to read.


Le Wed, Oct 13, 2021 at 07:01:17PM -0400, Chris Sorenson a écrit :
> > Message: 1
> > Date: Wed, 13 Oct 2021 09:32:20 +0200
> > From: Felix Hauri
> > ...
> > Working on an industrial PC, I've restaured a strange 18bits LCD display
> > G121XN01 V.0 (without touch panel.)
> >
> > https://www.panelook.com/G121XN01%20V0_AUO_12.1_LCM_parameter_831.html
> >
> > They are able to display 262K colors ( 6-bit Red, 6-bit Green, 6-bit Blue )
> >...
> 
> Wouldn't this be as simple as setting DefaultDepth 18 in xinitrc? Best 
> way to do this is copy the system xinitrc (or whatever it's a symbolic 
> link to) to ~/.xinitrc and do any experimenting from there.
> 
> If that doesn't work, for whatever reason X might need multiples of 8 
> bits, I don't actually know, but DefaultDepth 16 should work

-- 
 Félix Hauri  -  <felix at f-hauri.ch>  -  http://www.f-hauri.ch