Hi All, Back in September last year Fabien Lavignotte submitted support for using NVidiaTexureTools SDK within VPB for compressing and generating of mipmaps, this support neatly removes the need for a graphics contexts to be required by VPB. At the time I mentioned my desire to see this type of functionality migrated into the core OSG as plugin. Today I made it so :-)
To integrate NVTT with the I have introduced a new osgDB::ImageProcessor interface class, that is equivalent to existing osgDB::ReaderWriter class, but for plugins to implement image processing for us instead of loading. You can access any available ImageProcessor implementation via osgDB::Registry via : osgDB::ImageProcessor* imageProcessor = osgDB::Registry::instance()->getImageProcessor(); With the method the Registry will return the first available ImageProcessor that has been registered with it, and if it doesn't have available yet it'll try to load the "nvtt" plugin, and if this succeeds it'll return ImageProcessor that it implements. This design allows applications to remain decoupled from NVTT, and allow other implementations to be added down the line. The NVTT plugin is only compiled if your have NVTT SDK installed on your system, so there isn't any new dependency added to the OSG in it's default build. Now the NVTT support is integrated into OSG, VPB now longer needs to explicitly link to NVTT, so I've replaced the previously hardwired code to now use the new ImageProcessor interface provided by osgDB. I've been testing VPB builds using the new mechanism and so far all looks to be working as before. The nice thing is that VPB is no longer coupled to NVTT so there isn't any optional compile paths required, VPB can determine at runtime whether it has access to an ImageProcessor implementation and can fallback to using the old GL context based compression code when none is available. All these changes are now checked into svn/trunk of OSG and VPB (you'll need to update both). Wider testing would be appreciated ;-) Cheers, Robert. _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
