Rob Jenkins (robj++at++quid)
Tue, 17 Dec 1996 12:29:59 -0800
Please could you provide a more detailed definition of the problem with info
like:
The platform, OS, Performer version, patches installed and more detail on how
the textures seem incorrect ( a screen snapshot would be useful ). Also sample
code ( ideally a sort example that shows the problem our relevant snippets of a
large app )
If you'd like to be able to track your problem to solution I'd suggest you log
a support call with the TAC, including such details as above. You can call the
TAC on 1-800-800-4SGI ( 4744). If you mail me the call reference number I'd be
glad to pick the call up and work through it with you. That way you have a
reference number and single contact person.
Some stabs in the dark below :-)
If you're seeing banding ( quantisation ) in the textures then that may just be
a feature of the fact that to are using 16 bit textures. RGBA 16 bit = 4
bits/component so a greyscale going from black to white would only have 16
discrete levels of grey and would tend to have bunching of values around those
levels.
If you're using Impact please make sure you have patch 1447 ( for Irix 6.2 ) or
1332 ( for Irix 5.3 )
If you're using iR please make sure you have patch 1355.
If you have Performer 2.0 please make sure you have the correct pf 2.0
patch/patches:
There are three patches:
patch 1414 for IRIX 5.3-6.1 (requires that you have Performer2.0).
patch 1392 - dev for IRIX 6.2 (requires that you have Performer2.0).
patch 1347 - eoe for IRIX 6.2
You may have a conflict between your texture defition anfd the internal format
Performer is using to store the textures ( see man page for pfTexture esp
setFormat method ).
You may not be achieving the frame buffer config you asked for ( if using RE2
or iR ), try checking what you got ( use xwininfo -tree then -id outside code
or in code look at pfGetWinFBConfig etc ).
Cheers
Rob
On Dec 17, 11:51am, Chrysa Caulfield wrote:
> Subject: 16-bit per channel textures
> Please reply to Scott Brown. Thanks.
>
>
> --- Forwarded mail from sbrown++at++rttc.redstone.army.mil
>
> Date: Mon, 9 Dec 1996 08:25:16 -0800
> To: webmaster++at++www.sgi.com
> From: sbrown++at++rttc.redstone.army.mil (Scott Brown)
> Reply-To: sbrown++at++rttc.redstone.army.mil
> Subject: Mail from WWW
>
> return_url_label: [Return to Previous Document]
> return_url: /Archive/FAQs/performer/
> name: Scott Brown
> ftype: ffb
> email: sbrown++at++rttc.redstone.army.mil
> company: Amtec Corp.
> location: North America
> user_agent: Mozilla/2.0 (compatible; MSIE 3.0; Windows 95; 1280,1024)
>
> I'm interested in displaying 16-bit per channel textures in Performer. I've
> constucted a database with 16-bit textures but Perfomer doesn't seem to
display
> the textures correctly. Is this a bug in Performer and if so, is a patch
> available.
>
>
> --
> Received from: (136.205.91.87)
>
>
> ---End of forwarded mail from sbrown++at++rttc.redstone.army.mil
>
> --
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________________________________________________________________
Rob Jenkins mailto:robj++at++csd.sgi.com
Silicon Graphics, Mtn View, California, USA
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