Thanks Robert for the merge, I didn't mention it in my submission, but there is still one case where VPB still needs a graphics context, when you use the texture in 16 bit format (--RGB-16 command option). The code uses scaleImage, that is based on gluScaleImage, and i think this function needs an active graphics context to work. But i run out of time to test and fix it...
Cheers, Fabien -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Robert Osfield Sent: mardi 14 septembre 2010 14:42 To: OpenSceneGraph Submissions Subject: Re: [osg-submissions] [vpb] Using NVTT to work withoutgraphicscontext HI Fabien, I tried to get things compile with a static build of NVTT but in the end it required me to statically linking in OpenEXP and libsquish as well at which point, like you I gave up. It should be possible to get it all to work though given enough patience. With a dynamic build, the use of -fPIC and enabling of the Release build of NVTT finally got me a lib that worked with VPB and working as efficiently as the old GL based compression code. Horahh!! To test out the build of VPB against NVTT and GL I added a CMake option BUILD_USE_NVTT_WHEN_AVAILABLE that defaults to TRUE, this allows me to toggle between the two types of build. With this addition and few extras for opening the door for the static build I have checked your changes in into VPB svn/trunk. Cheers, Robert. On Fri, Sep 10, 2010 at 1:13 PM, Fabien Lavignotte <[email protected]> wrote: > Hi Robert, > By default, nvtt builds the static version of the lib, but as you see > its buggy on linux. > You can set NVTT_SHARED=TRUE to produce shared libs. Sorry, I totally > forget to tell you to compile NVTT as a shared library. > In fact, i did try to link with static lib, and i did the same > modification (add -fPIC), then it was needed to add all the library > (nvcore, nvimage, nvmath). > I didn't remember well, but i think there is still something not > working, so i give up and use the shared lib. > On windows, it works ok without modification. > > Fabien > > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of > Robert Osfield > Sent: vendredi 10 septembre 2010 13:50 > To: OpenSceneGraph Submissions > Subject: Re: [osg-submissions] [vpb] Using NVTT to work without > graphicscontext > > Hi Fabien, > > I'm currently integrating your changes. First thumbs up from me, > you've made the integration of NVTT very clean and maintainable :-) > > Now.. the tricky bits.. I've download > nvidia-texture-tools-2.0.8-1.tar.gz and compiled it. It uses CMake > which is great, I built and installed and then attempted to configure > VPB to pick on the libs, but it didn't fine the libs. For my build > NTT placed static libs in /usr/local/lib/static so I then added > lib/static and lib64/static to the FindNVTT script and it found them. > Then on buildingt VPB I got an error about needing to build NVTT with > -fPIC: > > /usr/bin/ld: /usr/local/lib/static/libnvtt.a(Compressor.cpp.o): > relocation R_X86_64_32S against `vtable for nv::BoxFilter' can not be > used when making a shared object; recompile with -fPIC > /usr/local/lib/static/libnvtt.a: could not read symbols: Bad value > collect2: ld returned 1 exit status > > So I went into CMake and added -fPIC, rebuilt NVTT and then installed. > This got me a bit further, but then got the error: > > Linking CXX shared library ../../lib/libvpb.so [ 88%] Built target vpb > [ 91%] Building CXX object > applications/osgdem/CMakeFiles/application_osgdem.dir/osgdem.o > Linking CXX executable ../../bin/osgdem > ../../lib/libvpb.so.0.9.11: undefined reference to `nv::Image::pixels()' > ../../lib/libvpb.so.0.9.11: undefined reference to `nv::Image::Image()' > ../../lib/libvpb.so.0.9.11: undefined reference to > `nv::AlphaBlockDXT5::index(unsigned int) const' > ../../lib/libvpb.so.0.9.11: undefined reference to > `nv::FloatImage::createImage(unsigned int, unsigned int) const' > > > Which suggests to me that I need to added NVTT to library list of > osgdem, vpbmaster, or possible just the vpb lib. I have to go out > right now so can't tinker further. > > What platform did you build and test with? > > Cheers, > Robert. > _______________________________________________ > osg-submissions mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-submissions-openscene > gr > aph.org > > ______________________________________________________________________ > This email has been scanned by the MessageLabs Email Security System. > For more information please visit http://www.messagelabs.com/email > ______________________________________________________________________ > > ______________________________________________________________________ > This email has been scanned by the MessageLabs Email Security System. > For more information please visit http://www.messagelabs.com/email > ______________________________________________________________________ > _______________________________________________ > osg-submissions mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-submissions-openscene > graph.org > _______________________________________________ osg-submissions mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-submissions-openscenegraph.org ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________ ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________ _______________________________________________ osg-submissions mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-submissions-openscenegraph.org
