On Thu 2017-01-19 15:07:12 -0500, Bob Friesenhahn wrote: > On Thu, 19 Jan 2017, Daniel Kahn Gillmor wrote: >> -operator channel operator rvalue[%] >> apply a mathematical, bitwise, or value operator to an image >> channel >> >> But: >> >> 0 dkg@alice:~$ gm convert /usr/share/pixmaps/debian-logo.png -operator all >> invert '100%' foo.png >> gm convert: Unrecognized operator (-operator). >> 1 dkg@alice:~$ >> >> Somehow this functionality is missing from the compiled build! > > The 'invert' keyword sounds useful but the GraphicsMagick > documentation specifies to use 'Negate' for this purpose.
d'oh! so it does.
> This is not a bug.
please consider it a wishlist bug about the error message, then. In
particular, the error message:
gm convert: Unrecognized operator (-operator).
reads to me like gm doesn't know what to do with "-operator". I woul
dhave expected it to say:
gm convert: Unrecognized operator "invert"
or:
gm convert: Unrecognized operator "invert" (-operator)
or something to indicate that (-operator) is the origin of the message,
rather than the subject of it.
thanks for pointing out my goof, though!
--dkg
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