[cairo-bugs] [Bug 23067] using clear drawing operator crashes printing

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=23067





--- Comment #8 from Chris Wilson <chris at chris-wilson.co.uk>  2009-08-05 08:12:22 PST ---
(In reply to comment #6)
> Thanks Chris.  As far as avoiding CLEAR operations, I'm not sure we have much
> choice.  The RS274X file format has a "negative polarity" command, which pretty
> much lets the user "erase" previously drawn objects by drawing a negative
> object over them.  Since we allow transparency, I didn't see any other way than
> to use the CLEAR operator to draw over it, since we can't just draw the object
> using the background color.  Are there some other methods to achieve the same
> effect?

I don't think so, other than a wishlist idea for flattening to objects rather
than images. Though I'd ask the question on the cairo mailing list, as with a
wider audience someone may have a good solution...


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