Legacy ImageMagick Discussions Archive

It seems, that an "identify -format %A" alone (for checking whether there's an alpha channel) doesn't read the image anymore correctly? False

The above worked in older IM versions, but not with the current version.
However, when combined with other properties, it's ok: True
DirectClassRGBMatte

(By the way, it should be PseudoClass here, not DirectClass.)
Using ImagMagick v6.6.7-10 Q16, Windows XP.

We can reproduce the problem you posted and have a patch in ImageMagick 6.6.8-0 Beta (available by sometime tomorrow). Thanks.

Works now. Thanks!

Another small thing.. 'identify -format "%x %y"' sometimes fails, too - at least with PNG files. Example - take this file:
http://img651.imageshack.us/img651/5595/rosebc.png ...
Resolution: 456x456
Units: PixelsPerInch
... 456x456
But with the next command, only the IM default value gets reported: 72 Undefined x 72 Undefined
But it works with "+ping": 456 PixelsPerInch x 456 PixelsPerInch
Or without +ping, but with an additional 'property': 456 PixelsPerInch x 456 PixelsPerInch
ImageMagick 6.6.8-2 2011-03-06 Q16 http://www.imagemagick.org

Seems that all of the tEXt/zTXt chunks in PNG are affected.

Yes, a recent patch involving the PNG text:density chunk inadvertently
suppressed all of the text chunks. Should be OK now in IM-6.6.8-4, SVN r3845.

How was the file "rosebc.png" created? It contains a text:density chunk and a text:units chunk,
and is missing some of the chunks usually written by ImageMagick.

I created the chunks manually (with TweakPNG).
Thanks for the new patch!