Re: Image/Pixbuf: How to set colour "behind" (semi)-transparent data?

[Toralf Lund <toralf procaptura com>]

Ole Laursen wrote:

> Toralf Lund <toralf procaptura com> writes:
>
>  
>
> > When drawing a pixbuf which has an alpha channel, how do I set the
> > background colour? I'm talking about the colour that will "shine
> > through" fully or partially where alpha value<255. (Seems like a
> > grayish colour is the default; I actually want black instead.)
> >    
>
> Hm, I think I've done this with both Hardware Monitor and Monster
> Masher (source available from my home page). IIRC, there is a
> modify_bg() method inherited from Gtk::Widget.
Yes, this actually turned out to work. I tried this method before 
asking, of course, but what confused me at first was that it's not the 
background of the image itself that will be visible through the 
transparent pixels, but the one of the object that contains the image. 
In other words, I essentially had to call

   image->get_parent()->modify_bg(...)

not just image->modify_bg(...)

- Toralf