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List:       mesa3d-users
Subject:    Re: [Mesa3d-users] OSMesa clamp pb with Mesa6.4.2
From:       Brian Paul <brian.paul () tungstengraphics ! com>
Date:       2006-03-14 15:04:23
Message-ID: 4416DB77.30100 () tungstengraphics ! com
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I've been out of town and too busy to look into this.  Maybe over the 
weekend or next week.

-Brian


Stephane Routelous wrote:
> Nobody can help me with this one ?
> No problem, I will go back to an older version.
> 
> Thanks,
> 
> Stephane 
> 
> -----Original Message-----
> From: mesa3d-users-admin@lists.sourceforge.net
> [mailto:mesa3d-users-admin@lists.sourceforge.net] On Behalf Of Stephane
> Routelous
> Sent: Tuesday, March 07, 2006 7:27
> To: Brian Paul
> Cc: mesa3d-users@lists.sourceforge.net
> Subject: RE: [Mesa3d-users] OSMesa clamp pb with Mesa6.4.2
> 
> Hi Paul,
> 
> I'm rendering a 3d scene (from OpenFlight files) using mglColor4f
> (mangled)
> 
> Thx,
> 
> Stephane 
> 
> -----Original Message-----
> From: Brian Paul [mailto:brian.paul@tungstengraphics.com]
> Sent: Monday, March 06, 2006 20:04
> To: Stephane Routelous
> Cc: mesa3d-users@lists.sourceforge.net
> Subject: Re: [Mesa3d-users] OSMesa clamp pb with Mesa6.4.2
> 
> Stephane Routelous wrote:
> 
>>Hi,
>> 
>>I've got some clamping problems with Mesa3d 6.4.2 and OSMesa I'm using
> 
> 
>>OSMesa to generate offscreen elevation maps from a 3d scene (where the
> 
> 
>>elevation is a float [-32767.0,32767.0] ) I compiled mesa with 
>>CHAN_BITS = 32 (in config.h) So, I'm expecting that when I give a 
>>"color" value for a pixel representing an elevation (let's say 
>>537.43), I got it unchanged in the resulting generated image.
>>But it seems that all my float values are clamped between 0 and 1.
>>I tried to "play" with OSMesaColorClamp, but it changes nothing.
>>
>>Did I miss something ?
>>In the past, I have done some tests with Mesa3d 6.3 and it worked
> 
> fine.
> 
> How are you specifying the colors?  glColor4f()?  Or are you drawing an
> image with GL_FLOAT pixels?  Or a texture?
> 
> -Brian
> 
> 
> 
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