CIP format: White pixels turn black

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CIP format: White pixels turn black

Postby Jason S » 2013-07-02T16:17:17+00:00

Using IM 6.8.6-3 to write CIP (Cisco IP Phone Image) format:
Code: Select all
$ convert -size 4x2 'xc:#000000' 00.cip
$ convert -size 4x2 'xc:#fefefe' fe.cip
$ convert -size 4x2 'xc:#ffffff' ff.cip

$ grep Data 00.cip
$ grep Data fe.cip
$ grep Data ff.cip

Almost-white pixels are correctly rounded up, but pure white pixels are encoded as if they were black. I think there's a rounding bug.
Jason S
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Joined: 2010-12-14T19:42:12+00:00

Re: CIP format: White pixels turn black

Postby magick » 2013-07-02T17:10:24+00:00

We can reproduce the problem you posted and have a patch in ImageMagick 6.8.6-4 Beta available by sometime tomorrow. Thanks.
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