[Gambas-user] gb.image: image alpha channel accessibility

[Benoît Minisini]

> Benoît Minisini wrote:
> > I'm not sure to really understand. Would you make some images for me?
> 
> It took me a while to hand make this in GIMP, but here's the idea:
> 
> http://www.eightvirtues.com/misc/alpha_stuff.xcf
> 
> There are eight tiles that use only alpha (ten if you include fully opaque
> and fully transparent), which are applied to a larger texture to make parts
> of it transparent to expose the underlying layers. In the GIMP file the
> eight tiles' alpha channels have been applied to the grass layer,
> effectively removing the undesired parts of it to expose the sand layer.
> 
> Basically, copying only the alpha channel of an image to the alpha channel
> of another image opens up all kinds of graphical possibilities. The alpha
> channel is one of the few things that can make 2D graphics look great,
> whether used normally or creatively.
> 
> -----
> Kevin Fishburne, Eight Virtues
> www:  http://sales.eightvirtues.com http://sales.eightvirtues.com
> e-mail:  mailto:sales at ...1887... sales at ...1887...
> phone: (770) 853-6271

I made an Image.DrawAlpha() method for you in revision #3101. Tell me if this 
is was you need.

Regards,

-- 
Benoît Minisini