[cairo-bugs] [Bug 20091] New: Polygon clipping to surface fails for certain values of vertices

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=20091

           Summary: Polygon clipping to surface fails for certain values of
                    vertices
           Product: cairo
           Version: 1.8.6
          Platform: x86 (IA32)
        OS/Version: Mac OS X (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: general
        AssignedTo: cworth at cworth.org
        ReportedBy: cairouser at yahoo.com
         QAContact: cairo-bugs at cairographics.org


The following code demonstrates the problem on my OS X 10.5 (using either
freshly compiled cairo 1.8.6 or the one that installs from Mac ports)

When the program is ran with input values of 40000000 (40 million) for either
of the dimensions, the surface is not filled completely. Instead only a narrow
vertical bar is filled. Surface may not be filled at all if origin is moved
(see commented code).

This prevents drawing of any polygons that have sufficiently large dimensions,
and must be drawn into smaller "tiles" for example.


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