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Encoding to DXT3 ?

Started by panic Apr 26, 2001 at 9:48 PM 2 replies 600+ views

Original Post

Apr 26, 2001 at 9:48 PM

Ok, so it''s not really openGL related, but I tought I would ask if anyone could point me to some information on how to compress an image to DXT3 format, for example, loading a TGA and then saving as DXT3. (and no, I can''t use any existing applications, since eventually when I get everything else working I will have to create DXT3 textures dynamicly in my engine) return 1;

NitroGL

Apr 27, 2001 at 11:15 AM

Don''t know really, and I don''t think you can legaly (DXTC is a Microsoft copyright), however, on my site I have my compression stuff (GTC), which lets you compress TGA images, and store them as GTC images (Generic Texture Compression), and the source is all there, so do what you want with it.

Also you can do internal compression, so the video card will compress the image for you, but the image that''s on the disk would be still uncompressed.

panic

Apr 27, 2001 at 11:34 AM

Hmm, that''s the thing, I need to compress the image on disk to DXT3.
I''m trying to write a Black & White Landscape editor

, and the Lowres textures in black and white are stored with DXT3 compression in the Landscape file.

return 1;

NitroGL

Apr 27, 2001 at 10:59 PM

hmm...

heres some links that might be helpful

http://www.nvidia.com/marketing/developer/devrel.nsf/bookmark/878CB8142D82DED388256951007AC707

http://www.nvidia.com/Marketing/Developer/DevRel.nsf/bookmark/50557D736903E139882568E80009CCD7

http://www.nvidia.com/Marketing/Developer/DevRel.nsf/bookmark/D2E358E485B99D3B88256A090061C14E

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