Rev equivalent to the php imageColorset ?

[Ludovic Thébault]

Hello,

I want to change the color of "sectors" of an png picture.

Each sector of the picture have an unique color.

With php, and the imageColorSet function, i can replace one color by an 
other in this picture, and colorize each "sector" as i want.

How do this with Rev (2.1) ? I think i need to use imagedata but i 
didn't understand how.

Thanks.

PS : If a frenchie known the response, he could post in the french rev 
list (my english is bad !)

Ludovic