Colormap problems w/ 8 bit graphics in 16 bit mode - stealth 64 vlb 2m vram card

Colormap problems w/ 8 bit graphics in 16 bit mode - stealth 64 vlb 2m vram card

Post by Reza Nai » Sat, 31 Dec 1994 22:49:00




I was able to tweak his settings and
optimize my hardware - i ended up w/ the folowing

ModeLine  "1128x900-74"    74.00   1104 1128 1264 1424    900 900 902 932

The only problem I have now is that when I view gifs (w/ XView)
all the colors are wrong - it's as if it's the right
color but applied to the wrong spot.  However JPGS work fine.
Is this a previously noted problem?  The gifs work fine
if I'm in 8 bit mode, but I would imagagine that they should
also work in 16 bit mode.  I only have 2M so I havn't tried
running it in 24 bit mode.  Any help would be appreciated.
The following is my system configuration :

Intel 486DX2/66
Diamond Stealth 64 vlb 2M vram card
Xfree 3.1

the following are relevant areas of my XF86Config file

Section "Device"
        Identifier      "Stealth 64 Vram 2M"
        VendorName      "Diamond"
        BoardName       "Stealth 64"
        Chipset         "s3_generic"
        ClockChip       "icd2061a"
        Ramdac          "bt485"
        Option          "dac_8_bit"

EndSection

        The colors all came out as different shades of green w/o
the Option "dac_8_bit".  I only tried the dac_8_bit w/
jpgs - i didn't try looking at gifs w/o that option...

 Section "Screen"
     Driver     "accel"
     Device     "Stealth 64 Vram 2M"
     Monitor    "MicroScan"
     Subsection  "Display"
         Depth      16
         Modes      "1128x900-74"
         ViewPort    0 0
     EndSubsection
EndSection

        I really wouldn't like to have to switch to 8 bit mode _every_
time I wanted to view a GIF.  Could it be a bad
card?  Any help would be appreciated,

thanks in advance,
Reza


p.s.  I am using the XF86-3.1-S3-Patch3.tar.gz server

thanks again..

 
 
 

Colormap problems w/ 8 bit graphics in 16 bit mode - stealth 64 vlb 2m vram card

Post by Jeremy Chatfie » Sun, 01 Jan 1995 02:32:55




>I was able to tweak his settings and
>optimize my hardware - i ended up w/ the folowing

>ModeLine  "1128x900-74"    74.00   1104 1128 1264 1424    900 900 902 932

>The only problem I have now is that when I view gifs (w/ XView)
>all the colors are wrong - it's as if it's the right
>color but applied to the wrong spot.  However JPGS work fine.
>Is this a previously noted problem?  The gifs work fine
>if I'm in 8 bit mode, but I would imagagine that they should
>also work in 16 bit mode.  I only have 2M so I havn't tried
>running it in 24 bit mode.  Any help would be appreciated.
>The following is my system configuration :

...

The problem is that your application is assuming the order of bits to
be presented to the RAMDAC.  This is a frequent porting problem on
older versions of xv and Mosaic.  Based on observation of our
customers, later versions have been correctly compiled.  You will
also find that Openlook (xview/olwm/olvwm) probably comes up in black
and white, too, unless you have discovered and used the '-depth'
argument to the window manager.

Cheers, JeremyC.
--

        X Inside Inc, P O Box 10774, Golden, CO 80401-0610, USA.
   Commercial X Server - for more information please try these services


 
 
 

Colormap problems w/ 8 bit graphics in 16 bit mode - stealth 64 vlb 2m vram card

Post by Harald Koen » Sun, 01 Jan 1995 07:32:30




> I was able to tweak his settings and
> optimize my hardware - i ended up w/ the folowing
> ModeLine  "1128x900-74"    74.00   1104 1128 1264 1424    900 900 902 932
> The only problem I have now is that when I view gifs (w/ XView)

you wanted to say "xv", right? XView is sonething completely different.

Quote:> all the colors are wrong - it's as if it's the right
> color but applied to the wrong spot.  However JPGS work fine.
> Is this a previously noted problem?  The gifs work fine
> if I'm in 8 bit mode, but I would imagagine that they should
> also work in 16 bit mode.  

so I'd think too, but xv-3.0 has a bug with 8bit images in 16bpp mode ;-)
when you convert the gif files to 24bit, they will be displayed correct.

Quote:> I only have 2M so I havn't tried
> running it in 24 bit mode.  Any help would be appreciated.

24bpp works fine with xv.

there is a patch around for xv-3.0 and some days ago xv-3.10
was released but I didn't test it in 16bpp mode yet to see if
those patches have been included (I hope so).

Harald
--
All SCSI disks will from now on                     ___       _____
be required to send an email notice                0--,|    /OOOOOOO\
24 hours prior to complete hardware failure!      <_/  /  /OOOOOOOOOOO\
                                                    \  \/OOOOOOOOOOOOOOO\
                                                      \ OOOOOOOOOOOOOOOOO|//
Harald Koenig,                                         \/\/\/\/\/\/\/\/\/
Inst.f.Theoret.Astrophysik                              //  /     \\  \

 
 
 

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