[Poppler-bugs] [Bug 25189] New: division by zero in Gfx::doAxialShFill

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=25189

           Summary: division by zero in Gfx::doAxialShFill
           Product: poppler
           Version: unspecified
          Platform: All
        OS/Version: NetBSD
            Status: NEW
          Severity: major
          Priority: medium
         Component: general
        AssignedTo: poppler-bugs at lists.freedesktop.org
        ReportedBy: M.Drochner at fz-juelich.de


Created an attachment (id=31318)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=31318)
patch to avoid division-by-zero

A PDF document (which I can make available but which is too large to post here)
could be viewed in "evince" but when I tried to print it the resulting PDF
was invalid. It turned out that it contained "nan" literally in linear shade
objects where numbers are expected.
The NaNs were originating from poppler's Gfx::doAxialShFill function. Both
tMin and tMax are zero in that situation (as was dy; dx was non-zero).
For now, I've using the appended patch to work around the problem.
(It seems to me that problem is in the intersection code but I didn't
look deeper yet.)


-- 
Configure bugmail: http://bugs.freedesktop.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug.