I would like to compress images into DXT5,
but not use my video card for this purpose.
(In fact, I cannot use the card because the S3TC
extension to openGL imposes certain constraints
on the size of images the card can compress.)

Once I have the compressed data in program memory,
I will later upload it onto the card using:

  glCompressedTexSubImage2DARB

Anyone know of 3rd party libraries (preferably C/C++)
that will do DXT5 compression "off-line"?

Thanks!

try

  * libtxc_dxtn
  * Version:  0.1
  * Copyright (C) 2004  Roland Scheidegger   All Rights Reserved.


hendrik


clrnsc@yahoo.com schrieb:
> I would like to compress images into DXT5,
> but not use my video card for this purpose.
> (In fact, I cannot use the card because the S3TC
> extension to openGL imposes certain constraints
> on the size of images the card can compress.)
> 
> Once I have the compressed data in program memory,
> I will later upload it onto the card using:
> 
>   glCompressedTexSubImage2DARB
> 
> Anyone know of 3rd party libraries (preferably C/C++)
> that will do DXT5 compression "off-line"?
> 
> Thanks!
> 

clrnsc@yahoo.com wrote:

> I would like to compress images into DXT5,
> but not use my video card for this purpose.
> (In fact, I cannot use the card because the S3TC
> extension to openGL imposes certain constraints
> on the size of images the card can compress.)
> 
> Once I have the compressed data in program memory,
> I will later upload it onto the card using:
> 
>   glCompressedTexSubImage2DARB
> 
> Anyone know of 3rd party libraries (preferably C/C++)
> that will do DXT5 compression "off-line"?
> 
> Thanks!

Both ATI and Nvidia have libraries and free programs on their
developer pages for this task.
I use ATIs "Compresonator", its a very good tool with lots of options and
features.
Nvidia has Photoshop plugins which I couldn't test yet. (Someone who wants
to buy Photoshop for me? ^^)

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Hendrik Wendler wrote:
> 
> try
> 
>  * libtxc_dxtn
>  * Version:  0.1
>  * Copyright (C) 2004  Roland Scheidegger   All Rights Reserved.
> 

ATI has one for dowload on their web site.

http://www.ati.com/developer/compress.html


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