[cairo-bugs] [Bug 84003] New: The incremental trapezoid stroker makes line-width-tolerance: FAIL (xlib, xlib-window)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=84003

          Priority: medium
            Bug ID: 84003
          Assignee: chris at chris-wilson.co.uk
           Summary: The incremental trapezoid stroker makes
                    line-width-tolerance: FAIL (xlib,xlib-window)
        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 106437
  --> https://bugs.freedesktop.org/attachment.cgi?id=106437&action=edit
patch for comparing test-suite output

Disabling it, as with the attached patch, makes many xlib tests pass.
It was reintroduced in commit 5bc1b1f6a, and apparently its limitations
are known.

I think that if the trade-off performance/quality is acceptable, then
tests slightly modified should see their reference images updated and
the remaining should be marked XFAIL.

Otherwise old minor differences will shadow future real bugs/artifacts.

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