Hi Sukender, My plan is to add a Image::buildMipmaps() functions that will use the new local gluScaleImage function that no longer requires a graphics context. However, this function won't support compressed textures as GLU has never support texture compression, and our integration of GLU parts into the OSG hasn't magically changed this.
I am also planning to integrate NVidiaTextureTools as an OSG plugin/extension which will be able to compliment the GLU functions and add support for compressed texture formats. This will however require the NVTT as external dependency. I may be able to get on to these tasks next week. Robert. On Thu, Nov 4, 2010 at 11:47 AM, Sukender <suky0...@free.fr> wrote: > Hi all, > > I need to generate mipmaps from an osg::Image (a 2D image actually, which may > be S3TC-DXTC compressed or not), and I have no OpenGL context. I just want my > image to have mipmaps. Do you know anything that may help me? > - Something to get a context without having to realize something, or with an > invisible window? > - Something to allocate mipmap memory, compute mipmaps, and store them in the > osg::Image? > > I guess osg::gluBuild2DMipmaps() is the key, but it needs a context and > process does not appear to be straightforward to me. > Thanks. > > Cheers, > > Sukender > PVLE - Lightweight cross-platform game engine - http://pvle.sourceforge.net/ > _______________________________________________ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
