pamcomp

Overlay two PAM images. More information: https://netpbm.sourceforge.net/doc/pamcomp.html.

• Overlay two images such with the overlay blocking parts of the underlay:

pamcomp path/to/overlay.pam path/to/underlay.pam > path/to/output.pam

• Set the horizontal alignment of the overlay:

pamcomp -align left|center|right|beyondleft|beyondright -xoff x_offset path/to/overlay.pam path/to/underlay.pam > path/to/output.pam

• Set the vertical alignment of the overlay:

pamcomp -valign top|middle|bottom|above|below -yoff y_offset path/to/overlay.pam path/to/underlay.pam > path/to/output.pam

• Set the opacity of the overlay:

pamcomp -opacity 0.7 path/to/overlay.pam path/to/underlay.pam > path/to/output.pam