Jouni K. Seppänen wrote: > I am thinking about adding pdf comparison ability to compare_images. One > simple way to do this would be to convert pdf files to pngs using > Ghostscript: if we store reference pdf files, and both the reference > file and the result of the test are converted using with exactly the > same version of gs, there should be no font-rendering or antialiasing > mismatches. > > Can we assume that all test computers will have some version of > Ghostscript installed and callable as "gs"? > We can probably standardize the version of gs on the buildbot machines, but it's been very useful up to now to have tests that can run on a variety of developer machines as well. I don't know how different the output will be from different versions of gs -- maybe we should just try it and see. I have a pretty old version of gs on my RHEL4 box (7.07). If you want me to send you a png of a particular pdf to directly compare with yours before you even start with the test infrastructure, I'm happy to do that. Mike -- Michael Droettboom Science Software Branch Operations and Engineering Division Space Telescope Science Institute Operated by AURA for NASA