Re: [pygame] Flood Filling Images

[Lenard Lindstrom <len-l@xxxxxxxxx>]

Kevin wrote:
> Hi, I'm looking for a fast way of "flood-filling" an image, like 
> changing all green to red and such (akin to PHP's imageColorSet() 
> function if that helps). The current method I'm looking at is locking 
> the surface, getting every pixel on the surface one by one and then 
> setting it if it's a certain color, and unlocking, but even the 
> documentation says that's going to be slow (maybe it's fast enough 
> with the new PyGame release?). There's a good chance I might have 
> missed something in pygame.display, but any suggestions or pointing to 
> some built-in thing would be appreciated.
Will the surface have alpha? The simplest way is to use a palette. If 
that is not an option then use Surface.set_colorkey. Set the color key 
of the source surface to the color to change. Then blit to a surface 
that is filled with the target color.

--
Lenard Lindstrom
<len-l@xxxxxxxxx>