Post any defects you find in the released or beta versions of the ImageMagick software here. Include the ImageMagick version, OS, and any command-line required to reproduce the problem. Got a patch for a bug? Post it here.
In IM Examples, Uniform 332 Colormap I generate a fully-opaque image with 256 colors. There is no alpha channel in the generated image, and no transparent colors.
convert -size 16x16 xc: -channel R -fx '(i%8)/7' \
-channel G -fx '(j%8)/7' \
-channel B -fx '((i>>3&1)|(j>>2&2))/3' \
-scale 600% colormap_332.png
The current SVN IM (6.6.7-7), created a Index PNG (that is fine) but with one color square fully-transparent! When you see the image it is pretty obvious which square turned transparent!
I've checked in a fix, r3597, to make the PNG encoder ignore bogus q->opacity values when image->matte is MagickFalse. I suppose it will be in IM-6.6.7-8.
