HI Marcin, Have you come up with a fix? I have plenty of stuff to get through so any assistance on resolving this bug would be appreciated.
Thanks, Robert. On 28 December 2012 12:57, Marcin Prus <[email protected]> wrote: > Hi all, > there's a bug in Image::computeImageSizeInBytes(int width,int height, int > depth, GLenum pixelFormat,GLenum type,int packing). > It's easiest to reproduce if you try to compress rectangular texture with > width > height using DXT compression. Last mipmaps with height < 4 will get > corrupted and some mipmaps may be lost because of computed size different > from the actual one. Use osgconv --compressed -O OutputTextureFiles > test01.ive out.osg on attached sample to create corrupted .dds file. > > Problem was introduced with change # 12912 from January I think and comes > from not taking block nature of DXT compression into account in > computeImageSizeInBytes function. computeRowWidthInBytes computes "average" > row size for DXT correctly but later there's no code to clamp height to 4 in > computeImageSizeInBytes for rectangular DXT textures (I think > computeBlockSize works as clamp for square ones so error is not present in > such case). Perhaps other texture formats are affected too but I tested only > DXT so far. I'll try to prepare fix but not before January 2nd. > > Best, > Marcin Prus > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
