Python test script ** Attachment added: "scaling.py" https://bugs.launchpad.net/librsvg/+bug/1119304/+attachment/3520528/+files/scaling.py
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to cairo in Ubuntu. https://bugs.launchpad.net/bugs/1119304 Title: Regression problem with libcairo2 (1.12.2) found in Quantal Status in libRSVG - SVG Rendering Library: New Status in “cairo” package in Ubuntu: New Bug description: The version of libcairo2 found in Ubuntu Quantal (1.12.2) and Raring (1.12.10) introduces a rendering bug that was not present in Oneiric (1.10.2) The rendering problem shows up when using the rsvg utility to convert particular SVG files to PNG format. (See package librsvg2-bin) When converting particular files, major artifacts are found in the output. At first I thought the bug was in librsvg2 but after some investigation I traced the problem to libcairo2. I was able to prove this by setting LD_LIBRARY_PATH to override the Quantal version with the Oneiric version. The artifacts then disappeared. TO REPRODUCE THE BUG This assumes you are running Ubuntu 12.10 Quantal. Download the following test SVG file into a directory and use gunzip to unpack it. http://www.eiffel-loop.com/download/waterfall.svg.gz Download the following Python test script into the same directory: http://www.eiffel-loop.com/download/scaling.py import subprocess for width in range (400, 900, 100): print 'Converting to width:', width subprocess.call (['rsvg', '--width', str (width), 'waterfall.svg', 'waterfall.%s.png' % width]) Make sure package librsvg2-bin is installed. Run the script from the command line. The script outputs 5 PNG files ranging in width from 400 to 800. The first and last PNG do not have any problem, but the 500, 600 and 700 width files all have major artifacts. TESTING LIBCAIRO2 VERSIONS Create a subdirectory 'libs'. Into this directory extract the shared object 'libcairo.so.2.xxxxx.x' from the libcairo2 debian packages for Raring and Oneiric. Select the one for testing by creating a link. This selects the 1.10.2 version for example ln libs/libcairo.so.2.11000.2 libs/libcairo.so.2 set the library path as follows export LD_LIBRARY_PATH=libs Run the test script again and examine the output. You will find that the 1.10.2 version produces images without any artifacts. To manage notifications about this bug go to: https://bugs.launchpad.net/librsvg/+bug/1119304/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
