I checked some PAM images with ImDisplay of ImageMagick-6.8.8-Q16 and got an inverted alpha channel if the subformat is BLACKANDWHITE_ALPHA.
No issues with gray and rgb alpha variants.
An example is in the zip file at http://forums.getpaint.net/index.php?/t ... /?p=405514
The specification of this format is quite limited so the issue may also be in the file data.
PAM subformat BLACKANDWHITE_ALPHA
Re: PAM subformat BLACKANDWHITE_ALPHA
We can reproduce the problem you posted and have a patch in ImageMagick 6.8.8-8 Beta, available by sometime tomorrow. Thanks.
Re: PAM subformat BLACKANDWHITE_ALPHA
Thanks taking this into acount.