Re: [Linux-fbdev-devel] setcolreg vs. 565

[Benjamin H. <be...@ke...>]

>On Fri, 2001-11-23 at 16:34, Benjamin Herrenschmidt wrote:
>> >Except that you can't change gamma, or am I on the wrong track here?
>> 
>> Well, X fbdev driver can only do truecolor afaik. It does send a
>> linear gamma table to the driver which is required anyway as the
>> fbdev themselves can be directcolor, but for real directcolor
>> support in X, we would probably need some other changes.
>
>So why does xgamma work with it?

I don't know ;) I've looked at the source and it clearly states
supporting only truecolor, but well, maybe xgamma is taking some
weird path within the X server ? really no idea.

BTW, I found my bug and now have 5:6:5 working properly. I'll
implement 5:5:5 and backport some of my fixes to aty128fb as
in it's current state, I beleive it's gamma setting doesn't
work properly neither. You get a clear picture because of the
hack that force a linear ramp when setting LUT entry 0, but
that hack can be removed if the rest is done properly ;)

Ben.