Masking issue with 7.0.5

[chaoscarnage]

Just updated from 6.
We use this method of applying masks to images.

Code: Select all

convert blank.png img.png mask.png -composite img.png 

In 6 this worked great, in 7 the mask doesn't seem to be applied at all and the png also loses all transparency.
Is there a command that I need to add in 7 to get the default behavior from 6?

[magick]

IMv7 has a reverse alpha from IMv6. Try

Code: Select all

convert blank.png img.png \( mask.png -negate \) -composite img.png

[chaoscarnage]

Looks like that did the trick! Thanks a ton!

[chaoscarnage]

I apologize but I appear to still have issues with partial masks.

When I apply a mask that's half black and half white It masks as you'd expect but the white part becomes entirely filled with black.

Any way to stop the white pixels from being filled in?

[chaoscarnage]

using -read-mask and -compose CopyOpacity seemed to help.