From: Kyle Stamper <joekyle AT geocities DOT com>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Allegro Grabber question
Date: Mon, 02 Aug 1999 12:30:46 -0400
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

yep, that's it. Running the grabber with -320x240 fixed it. Thanks a
lot.

	Kyle 


Matthew Haley wrote:
> 
> Hi everyone,
> 
> On Mon, 2 Aug 1999 10:17:12 +0300, "Pavlos" <trash24379 AT usa DOT net>
> wrote:
> 
> >Well, no, grabber will not do this if it's working fine. Normally, you would
> > be able to see a menu, the left list box, the right gray area plus some
> >other
> >dialog objects. I never had problems with the grabber and I can't tell why
> >you
> >get this. Did you compile the grabber by making Allegro? Did you make it
> >for DJGPP or maybe MSVC?
> 
> I think the problem is a cheap video card, I have the same situation
> when I run the grabber. I have a Tamarack VGA with PVGA1A chipset
> (i've never heard of it either :) and for some reason all programs
> think it can do 640x480x256 when in fact it can only do up to 640x400.
> Unfortunately even 640x400 it is unusable with a lot of streaking
> everytime the screen get drawn. So since Allegro only supports 256+
> colors I must run grabber with 'grabber -320x240' ...
> 
> The same problem is evident when I run some of the example programs.
> 
> >
> >Also, you can try running the grabber in a different depth and resolution.
> >Maybe another color depth/resolution will work.
> >
> ><from allegro/tools/grabber.txt>
> >>By default, the grabber will run in a 640x480 resolution, using the highest
> >>color depth possible on your graphics card. If you want to override this,
> >>you can specify an alternative color depth or resolution on the
> >commandline,
> >>eg. "grabber -8" for a 256 color mode, "grabber -16" for 16 bit hicolor
> >>graphics, "grabber -320x200" to use VGA mode 13h, or "grabber 1024x768".
> >>Warning: editing datafiles that contain truecolor graphics is very slow in
> >>256 color video modes, and the grabber is not really usable in resolutions
> >>lower than 640x400.