Public bug reported: pixman 0.38.4-0ubuntu1 in focal (and actually pixman 0.38.x generally) has a regression that causes incorrect rendering in some circumstances. This can be triggered by the use of cairo with CAIRO_OPERATOR_SATURATE and subpixel positioning, and causes OpenSlide <https://openslide.org/> to produce incorrect output.
The attached test program will print "Failed" if the bug exists, or "OK" if it doesn't. This is fixed upstream in https://gitlab.freedesktop.org/pixman/pixman/-/commit/8256c235, which is in pixman 0.40.0. See https://github.com/openslide/openslide/issues/278 for more context. ** Affects: pixman (Ubuntu) Importance: Undecided Status: New ** Attachment added: "Test program" https://bugs.launchpad.net/bugs/1988796/+attachment/5613888/+files/pixman.c -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to pixman in Ubuntu. https://bugs.launchpad.net/bugs/1988796 Title: Incorrect rendering triggered by cairo CAIRO_OPERATOR_SATURATE with subpixel positioning To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pixman/+bug/1988796/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
