Composite opaque images of different size

[snibgo]

Input images:

Code: Select all

convert -size 120x120 gradient:red-white grad_r.png

convert -size 100x100 gradient:green-white -rotate 90 grad_g.png

v6 and v7 produce identical images:



Command under test:

Code: Select all

convert ^
    grad_r.png ^
    grad_g.png ^
    -gravity Center -compose %%L -composite ^
    grad_rg_%%L.png

Comparing outputs from v6.9.2-5 and v7.0.1-3, compose operators "ChangeMask", "Clear", and "Src" have major differences.

Below are the results. In each pair, the first is v6, the second is v7.

ChangeMask:



Clear:



Src: