Hi, Tatsuhiro Nishioka schrieb: > Another problem is that imageio's libpng doesn't properly handle transparency > in PNG file. The problem I have is that the transparency in PNG files are not > at all handled and we see a lot of unexpected black or dark portions. I > strongly recommend the use of osgdb_png.so (or .dylib) for handling png > images instead of imageio.
looks like that the current implementation of imageio works with premultiplied alpha, ideally all occurences of kCGImageAlphaPremultipliedFirst should be replaced by kCGImageAlphaFirst, but some test-data could help isolating the problem. cheers, Stephan _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org