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PNG transparency issue IM 6.7.0.5 Q16

Posted: 2011-06-08T14:50:16-07:00
by fmw42
IM 6.7.0.5 Q16 Mac OSX tiger

Given the following image:

Image

The following works fine if the output is gif:

convert boxes.gif -transparent white boxes_trans.gif

Image


But creates transparency for the black instead of the white when the output is png.

convert boxes.gif -transparent white boxes_trans.png

Image

Re: PNG transparency issue IM 6.7.0.5 Q16

Posted: 2011-06-08T19:22:36-07:00
by glennrp
The problem seems to exist with both Q8 and Q16 builds at least as far back as IM-6.6.6-1.
(but only with Q16 builds recently, at least from 6.6.9-6 and later)

Re: PNG transparency issue IM 6.7.0.5 Q16

Posted: 2011-06-08T21:22:39-07:00
by glennrp
Fixed in IM-6.7.0-7, SVN revision 4608.

Re: PNG transparency issue IM 6.7.0.5 Q16

Posted: 2011-06-08T21:38:03-07:00
by fmw42
glennrp wrote:Fixed in IM-6.7.0-7, SVN revision 4608.

Thanks Glenn,

Fred

Re: PNG transparency issue IM 6.7.0.5 Q16

Posted: 2011-06-13T13:13:09-07:00
by fmw42
thanks glenn,

this issue seems to be fixed in IM 6.7.0.7 Q16 Mac OSX tiger

this now works correctly.

convert boxes.gif -transparent white boxes_trans.png


Fred