Re: Draw multiple Gdk::Pixbuf to one DrawingArea?

[Krzesimir Nowak <qdlacz gmail com>]

On Tue, 2010-12-21 at 14:45 +0000, Harry Van Haaren wrote:
> Hey all,
> 
> I've been trying to get this sorted for a while, and now I'm resorting to
> asking yee guys. :-)
> 
> I have a class that derives from a DrawingArea, and in this widget I want to
> display 2 .png files.
> 
> I have code to show 1 image:
> Glib::RefPtr<Gdk::Pixbuf> faderImage=
> Gdk::Pixbuf::create_from_file("faderGreen.png");
> 
> faderImage  -> render_to_drawable(    get_window() ,
>                                         get_style()->get_black_gc(),
>                                         0, 0, 42, 100,
>                                         faderImage->get_width(),
> faderImage->get_height(),
>                                         Gdk::RGB_DITHER_NONE, 0, 0);
> 
> That code works perfect, just as I'd want it to. The problems start here:
> 
> I create another Pixbuf pointer:
> Glib::RefPtr<Gdk::Pixbuf> backgroundImage;
> 
> And compiling will still work, but the program segfaults? Is there something
> that you can't have
> 2 Glib::RefPtr 's in one class or something?
> 
> Hope somebody can help, cheers, -Harry

Since I don't see much code then I can guess that maybe one of your
Glib::RefPtrs is NULL.

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