How to set a background then create rounded corners using GD or ImageMagick?

Question

The problem I have is quite simple, I'm hoping somebody with GD or ImageMagick experience can answer it.

I have a source .gif (which may or may not have transparency). I want to set a background (a gradient, though specifics shouldn't matter), put the .gif on top of that, then round the corners. The rounded corner areas should be transparent. Note that if the .gif is not transparent, the background would have no effect, since the .gif would go on top of it. This is acceptable.

Thanks for the help!

Answer 1

You probably need to use a mask, check http://www.imagemagick.org/Usage/channels/#masks for examples.