Re: [Pipmak-Devel] Problems/bugs with patch images

[Christian W. <cwa...@gm...>]

Andrea Viarengo wrote:
> 2) I would like to create a transparent hole (alpha=0) in a png image, I 
> need this for doors and windows, so I have operated  in this manner:
> 
> img=pipmak.loadimage(texture.."/front.png")
> w,h=img:size()
> img:color(0,0,0,0)
> img:fill(w/3,h/3,w/3,2*h/3)
> 
> but I get only a black shape and not a transparent hole: this is a bug?

image:fill() doesn't add an alpha channel to an image that doesn't 
already have one. Whether that's a bug or not is debatable, it's 
certainly a limitation that needs to be documented at least. Fixing it 
is probably going to be non-trivial. Depending on how we decide to solve 
the loadimage-returns-existing-object problem, it may go away entirely.

Thanks for finding this!

  -Christian