[Poppler-bugs] [Bug 101416] New: stroking alpha constant not respected for pattern

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101416

            Bug ID: 101416
           Summary: stroking alpha constant not respected for pattern
           Product: poppler
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: cairo backend
          Assignee: poppler-bugs at lists.freedesktop.org
          Reporter: novalazy+freedesktop at gmail.com

Created attachment 131940
  --> https://bugs.freedesktop.org/attachment.cgi?id=131940&action=edit
test case

In the attached test case, we stroke a rectangle using a shading pattern. The
stroking alpha constant (CA) is set to 0.25 but the stroke is drawn opaquely.
It seems to use the nonstroking alpha constant (ca) instead, which is still at
the initial value of 1.0.

The test case draws two more shapes for comparison.

1. stroke a rectangle with a solid colour: the stroking alpha constant is
respected in this case.

2. fill a rectangle with the shading pattern; the nonstroking alpha constant is
respected.

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