[gs-bugs] [Bug 691157] Problem with image masking

bugzilla-daemon at ghostscript.com bugzilla-daemon at ghostscript.com
Tue Jul 13 21:01:11 UTC 2010


http://bugs.ghostscript.com/show_bug.cgi?id=691157

--- Comment #2 from Michael Vrhel <michael.vrhel at artifex.com> 2010-07-13 21:01:08 UTC ---
Made a bit of progress on this.  The soft mask consists of an image that has a
soft mask of its own which has an inverted encoding.  The soft mask with the
inverted encoding ends up having a bounding box region that is 0 and so it is
not really used. However, with transparency the GrayBackground value needs to
be considered outside the bounding box and I suspect that is not happening here
since it is likely a value of 1 but we need to consider the inverted encoding
of the image, which is not happening.  Just a theory at this point to explain
what I am seeing.

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