[Gambas-user] How do I replace Image transparent background with a white background?

[RICHARD WALKER]

And joyful thanks to Benoît too,

If I interpret that correctly, that will also convert any partially
transparent areas to fully opaque. I haven't tested it yet (soon to be
remedied) but my guess is that it will look much better than my
simplistic method where, for example, anti-alias artifacts may be
present.

Richard