Colormap settings?

[Florian Harmuth]

thx for your explanation.

flo

2007/12/18, Glynn Clements <glynn at gclements.plus.com>:
>
>
> Florian Harmuth wrote:
>
> > i have a little problem regarding colormaps. After a call of
> XCreateImage /
> > XShmCreateImage i get under my via cpu (savage gpu) for image->red_mask
> a
> > value of 0xf800. Under my Geode cpu i get 0x0 for all color masks. My
> > problem is that i should use xrfbviewer where the color choose is
> > implemented with a dependecy on this color values (XFramebuffer.cc).
> > I have attached my Xorg.log file where one line says it uses
> PseudoColors.
> > Is that my problem?
>
> Yes. The colour masks are only meaningful for TrueColor and DirectColor
> visuals.
>
> > Any suggestions?
>
> Well, you can tell the X server to use a TrueColor visual with "-cc 4",
> but you'll also need to increase the display depth above 8bpp (with
> e.g. "-depth 16") to get decent quality.
>
> The only other solution is to re-write the code to support other visual
> types.
>
> Even then, there are so many applications which take a true-colour
> display for granted that this particular application is likely to be
> the least of your problems. It isn't just code which is the problem,
> but also graphics (icons, splash screens etc) which can consume the
> entire colourmap.
>
> --
> Glynn Clements <glynn at gclements.plus.com>
>
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