[cairo-bugs] [Bug 84120] New: X11 overestimates unbounded operations affected area -> set FORCE_CLIP_REGION

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=84120

          Priority: medium
            Bug ID: 84120
          Assignee: chris at chris-wilson.co.uk
           Summary: X11 overestimates unbounded operations affected area
                    -> set FORCE_CLIP_REGION
        QA Contact: cairo-bugs at cairographics.org
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: sixtysix at inwind.it
          Hardware: Other
            Status: NEW
           Version: unspecified
         Component: xlib backend
           Product: cairo

Created attachment 106578
  --> https://bugs.freedesktop.org/attachment.cgi?id=106578&action=edit
proposed patch

Before calling clip_and_composite, setting the flag FORCE_CLIP_REGION
when !extents->is_bounded in clip_and_composite_boxes,
as it is already done in clip_and_composite_polygon and
clip_and_composite_traps, fixes overlapping-boxes.xlib.rgb24 and
visibly improves tighten-bounds.xlib.argb32.

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