Re: [Gimp-developer] Mystery: scaling "thin" areas makes them partially transparent

[Nicolas Robidoux <nicolas robidoux gmail com>]

This is how to fix this

Enhance GIMP and GEGL so that the Image Scale and Layer Scale
operations use the “CLAMP” (nearest neighbour) abyss policy and the
tools that use samplers use the “NONE” (fade to transparency) abyss
policy. This will remove the border artifacts from the former
operations without introducing “radiating extensions” to the latter.

Note: Enlarging or shrinking abnormally small images is not part of
the target use case. I also am not 100% sure that the above
recommendation is consistent with the target use case.

Also note that I committed to fix this a bit less than a year ago and that
a lot of "life" happened in the meantime.