HI Chris, On Mon, Jun 20, 2011 at 4:49 PM, Chris Denham <[email protected]> wrote: > I can't help wondering if we are missing a trick with OSG's DDS plugin? > It looks as though it might contain some reusable magic for these kind of > compression formats. :-)
The DDS plugin just reads and write compressed formats as a single block there is no compression of decompression either way. As a general note I would add that all OpenGL compressed formats a lossy are a pretty poor at representing the original images, they don't come close to the likes of jpeg, png etc in terms of compression quality. So uncompressing a GL compressed image will not result in good results and is never intented to - it's all about getting good performance down the GPU. Given these constraints it far better to keep around the original images and do work on them and re-generate the compressed data when needed, and only ever view the GL compressed formats as write only. Robert. _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
