[cairo-bugs] [Bug 22441] New: Unexpected shift with push_group and pop_group

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=22441

           Summary: Unexpected shift with push_group and pop_group
           Product: cairo
           Version: 1.8.6
          Platform: x86 (IA32)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: pdf backend
        AssignedTo: ajohnson at redneon.com
        ReportedBy: stefan.roellin at gmx.ch
         QAContact: cairo-bugs at cairographics.org


A problem with the pdf cairo backend was found in inkscape, see bug
https://bugs.launchpad.net/inkscape/+bug/320646

The attached program reproduces this behaviour. It does basically the
following:

    draw a circle
    cairo_push_group
    draw another circle at same place as first
    cairo_pop_group_to_source
    cairo_paint_with_alpha

One would expect that both circles are shown at the same place, which is not
the case. It depends on the page size, whether the second circle is at the
correct position or not.


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