Re: Clutter and GTK

[Diego Jacobi <jacobidiego gmail com>]

2009/4/16 Diego Jacobi <jacobidiego gmail com>:
> Is it possible to draw all GTK stuff inside a Clutter surface? And the
> get the clutter instance from any widget or DrawingArea.
>
> I want to try to develop some widgets with 3D animation (if available)
> (like transitions in a tabbed browsing), and i have read that Clutter
> cant create more than one Clutter-Gtk per window.
>
> So i am guessing if there is some sort of feature to enable to draw
> GTK completely inside of a Clutter window, and the widgets with its
> own animation will create its own surface.
>
> If not, maybe there is some method to not create a window with GTK,
> and call an event with the image result and then paint it to Clutter.
>


I have managed to get the screenshot of only the application, this is
called "offscreen rendering".
But i cant get the parent window hiden.
If i hide the widget, i get a NULL image.
So it doesnt work, if the widget is not shown.
Is it possible to create a TopLevel Window that acts as a parent but
draws everything to a PixBuf ?
I clearly not a GTK internals expert, but cant a GdkPixBuf be a
GdkVisual?, or a Screen, or whatever that emplies the dest. device?

And on each redraw or update, call an update event with a pointer to
that object and the updated rect.



/*Code to take screenshots*/

    GdkColormap* colormap;
    GdkPixmap* pixmap;
    GdkPixbuf* pixbuf;
    GError *error = NULL;

    //gtk_widget_hide(win);

    pixmap= gtk_widget_get_snapshot(win, NULL);  // works if obscured
    colormap = gdk_drawable_get_colormap(pixmap);
    pixbuf = gdk_pixbuf_get_from_drawable( NULL, GDK_DRAWABLE(pixmap), NULL,
                                        0, 0, 0, 0, -1, -1);
    gdk_pixbuf_save (pixbuf, "/home/diego/Desktop/test.png", "png",
&error, NULL);
	if (error)
    g_print("Error: %s\n", error->message);