Legacy ImageMagick Discussions Archive

No, they were aware of what Q32 was and had some applications when they cared about the extreme accuracy, but didn't expect that enabling it would break other simple operations. I suppose the surprising thing is that if png doesn't support 32-bit and something tries to do that, that you get a bogus ...

What do you get from regarding features and delegates? % convert -version Version: ImageMagick 7.0.2-6 Q32 x86_64 2016-08-11 http://www.imagemagick.org Copyright: Copyright (C) 1999-2016 ImageMagick Studio LLC License: http://www.imagemagick.org/script/license.php Features: Cipher DPC HDRI ...

If you link to an XWD that shows the problem, that would increase the chance of someone looking at the problem.

I would have attached a file, but can't do that here so you can get an XWD that demonstrates the problem at the below url:

http://homepages.ecs.vuw.ac.nz/~mark/20 ... 630-02.xwd

using ImageMagick 7.0.2-6 (and some previous versions) built with "--with-quantum-depth=32" on ArchLinux (x86_64) fails to convert from xwd to png. eg "convert foo.xwd foo.png" produces a png of the correct dimensions but blank. If rebuilt with the default quantum depth of 16 then the conversion ...