Michael Droettboom wrote: > 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. > I understood Jouni's idea to be to save the .pdfs as baseline images -- then the same version of gs would be used to generated the rasterized images for the baseline and test result -- the version on your computer. I think this is the way to go (either that or compare the PDFs directly somehow).
Anyhow, allowing the test infrastructure to support testing multiple backends is why I removed file extensions from the test image name in the first place, so anything along these lines should hopefully be quite doable. We could add a keyword arg to the image comparison decorator that specified which image formats to test. Alternatively, it could perform comparisons based on the presence baseline images of known extensions. -Andrew ------------------------------------------------------------------------------ Come build with us! The BlackBerry® Developer Conference in SF, CA is the only developer event you need to attend this year. Jumpstart your developing skills, take BlackBerry mobile applications to market and stay ahead of the curve. Join us from November 9-12, 2009. Register now! http://p.sf.net/sfu/devconf _______________________________________________ Matplotlib-devel mailing list Matplotlib-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-devel
