Re: [osg-users] [osgPlugins] DDS Texture vanish with LINEAR_MIPMAP_LINEAR
Hi, I have a question. Why while reading dds file, to set number of mipmaps it is using function osg::Image::computeNumberOfMipmapLevels( s, t, r ) but not what is written in dds file header ? I think that dds file knows better how many mipmaps it has inside. Thank you! Cheers, Lukasz -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=51911#51911 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] [osgPlugins] DDS Texture vanish with LINEAR_MIPMAP_LINEAR
Hi, But for example we have 512x512 dds texture compressed with DXT1 and in header we have 4 mipmaps. In this example is meaningless to compute number of mipmaps, because OpenGL ,with my knowledge, does not generate mipmaps for compressed textures. So setting bigger number of mipmaps is wrong. I didn't find a program which generate dds and write wrong number of mipmaps. If it does change the program :). Thank you! Cheers, Lukasz -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=51914#51914 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] [osgPlugins] DDS Texture vanish with LINEAR_MIPMAP_LINEAR
Hi, i probably have solution for this problem, i have found a bug in dds plugin ReaderWriterDDS.cpp Line 633 unsigned numMipmaps = osg::Image::computeNumberOfMipmapLevels( s, t, r ); when compute numMipmaps returns wrong number. this number is less then number of mipmaps in dds file( ddsd.dwMipMapCount ) . This bug makes that when dds mipmaps are loaded to opengl last mipmap (4x4) isn't loaded. and with combination with LINEAR_MIPMAP_LINEAR make this bug. the numMipmaps should be taken form ddsd.dwMipMapCount in attachment i send a corrected version of file. ... Thank you! Cheers, Lukasz -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=51653#51653 Attachments: http://forum.openscenegraph.org//files/readerwriterdds_204.cpp ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
