Re: [Linux-fbdev-users] FB_VISUAL_TRUECOLOR vs.FB_VISUAL_DIRECTCOLOR

[James L. <ja...@ak...>]

I have a bit more work to do. I found that getting the color map right for
packed pixel mode, 565, was kind of tricky; as you had indicated. I also
realized that my code sort of relies on the fact that the color map is NOT
in use when the card is in bpp higher than 8. I use the color map to hold
shifted values from a palette bitmap file to get the colors onto the screen.
So I will have to rewrite that stuff; because with a direct color card, the
color map is always in use. I would love to send you a snapshot of my code.
It comes with a demo program that runs the video card through all sorts of
tests in every possible bpp.

James.   :o)


----- Original Message ----- 
From: "Antonino A. Daplas" <ad...@gm...>
To: <lin...@li...>; "James Lehman"
<ja...@ak...>
Sent: Sunday, August 06, 2006 7:42 PM
Subject: Re: [Linux-fbdev-users] FB_VISUAL_TRUECOLOR
vs.FB_VISUAL_DIRECTCOLOR


> James Lehman wrote:
> > I'm not so sure there is a bug in the kernel or the drivers, but I can
say
> > for sure that this code gets called.
>
> Then it's a bug.
>
> Can you try removing fb_set_cmap() in driver/video/fbmem.c:fb_set_var()?
> If that still does not work, can you point me to a test app?
>
> Just to clarify, is this the sequence, or something near this?
>
> ...
> ioctl(KD_GRAPHICS);
> ...
> ioctl(FBIOPUT_VSCREENINFO);
>
> ioctl(FBIOPUTCMAP);
> ...
> ioctl(KD_TEXT);
> ...
>
> Tony
>
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