Hi Eduard, The use of PBO may well help, but only if the pixel formats are accelerated properly by the driver, this can be a bit of lottery.
It just so happens that my recent work on integrating GLU implementations directly into the core OSG has been prompted by the wish to pre-process imagery into a form that is better for downloading to the graphics card. I will be tweaking the gluScaleImage function to enable us to call it from any thread, rather being restricted to just threads with a valid graphics context, this opens the door to resizing, altering pixel formats and generating mipmaps all in normal CPU threads, such as parts threads that are loading data. Another step along this route I plan to integrate the NvidiaTextureTools SDK into a plugin to allow us to compress imagery to GL friendly compressed pixel formats, again this can be done as runtime pre-processing step so that all the data is a form that is ideal for downloading to the GPU and minimizing memory footprint and bandwidth. This will all be part of the next dev release, 2.9.10, and the up coming 3.0 release. Robert. _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
