Last modified: 2012-02-21 11:12:04 UTC
The librsvg version used on Wikimedia's servers seems to be pretty outdated. According to http://meta.wikimedia.org/wiki/SVG_image_support#Current_implementation the version used is pre-Cairo. The first stable librsvg version using Cairo backend was released 2005-09-15 and it works just fine. The outdated version holds back some SVGs that could replace current PNGs. Problems include lacking support for dashed lines, lack of support for viewboxes and some various rendering anomalities. Here are some examples: http://en.wikipedia.org/wiki/Image:DDC_field.svg vs. http://en.wikipedia.org/wiki/Image:DDC_field.png http://en.wikipedia.org/wiki/Image:Cartesian_coordinates_3D.svg vs. http://en.wikipedia.org/wiki/Image:Cartesian_coordinates_3D.png
2.3.93 seems to misposition the text on [[Image:Mitochondrie.svg]]. Have to do some more testing... On the plus side, it seems to be marking a white background color so the transparent rendered images look ok in IE 6.0.
Filed upstream as: http://bugzilla.gnome.org/show_bug.cgi?id=330956 Seems to be regression in 2.3.93; 2.3.92 is ok, and reverting a patch there looks ok.
Installed 2.14.0 and forcing all thumbs to regenerate (for this and various other fixed image bugs). Referenced images look good.
Sorry, this still doesn't work for Gradients. http://bugzilla.wikimedia.org/show_bug.cgi?id=4593 Needs more rsvg lib fixes :( reopening.
I just compiled librsvg-2.14.0 locally. The fencing image gets rendered correctly here. So I'd assume the error is not in librsvg this time but rather in some underlying lib, maybe cairo or something. Some information on the libs I have installed here: cairo-1.0.2: libcairo.so.2.2.3 glib-2.8.6: libg{lib,module,object,thread}-2.0.so.0.800.6 gtk+-2.8.12: libgdk_pixbuf-2.0.so.0.800.12 libpng-1.2.8: libpng12.so.0.1.2.8 pango-1.10.3: libpango{,ft2}-1.0.so.0.1003.0 xorg-6.8.2: lib{X11.so.6.2,Xext.so.6.4,Xrender.so.1.2.2}
There's nothing to upgrade, resolving FIXED. Also please remember that EXISTING RENDERINGS HAVEN'T ALL BEEN REBUILT YET. TEST NEW SIZES BEFORE MAKING FURTHER COMMENT.
Ok, action=purge can now be used on an image page to force images to rerender. (Be careful about caching; make sure it reloads the new image!)
The current version seems to ignore line widths. For instance, http://de.wikipedia.org/wiki/Bild:Raytracing.svg should look like http://de.wikipedia.org/wiki/Bild:Raytracing.png .
Regarding #8, I've just submitted a bug about this in librsvg's bug tracker: http://bugzilla.gnome.org/show_bug.cgi?id=333057. Before that and other bugs are fixed, there is no upgrade to make, and therefore this bug should remain "FIXED". Furthermore there is still a problem with one of the referenced pictures in the first post: http://en.wikipedia.org/wiki/Image:DDC_field.svg vs. http://en.wikipedia.org/wiki/Image:DDC_field.png (the arrows are too small, I have mailed the librsvg list about this) I still think this version is much better than the previous one, so thank you Brion for the upgrade!
http://bugzilla.gnome.org/show_bug.cgi?id=333057 is now fixed.
Do *NOT* reopen this bug ever again. This bug was for a specific upgrade, which has been performed. If there are other problems, open a new bug about them.
