[Poppler-bugs] [Bug 17346] New: Simple knockout groups should just be rendered with CAIRO_OPERATOR_SOURCE

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=17346

           Summary: Simple knockout groups should just be rendered with
                    CAIRO_OPERATOR_SOURCE
           Product: poppler
           Version: unspecified
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: cairo backend
        AssignedTo: poppler-bugs at lists.freedesktop.org
        ReportedBy: cworth at cworth.org
                CC: jeff at infidigm.net


Cairo uses knockout groups to put its fallback images into PDF files, and cairo
would be happier if poppler would just use SOURCE to draw those groups.

This could probably be done if poppler looked at the knockout group and saw
that it just consists of drawing one rectangular image, (so it knows the
"shape" is a rectangle and doesn't need to compute the shape and draw with
DEST_OUT and ADD to get the shape).

Good luck, Jeff!

-Carl


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