[Swfdec] Transparency of widget backgrounds

[Karri Kaksonen]

Hi,

I played around with gtk transparency a bit.

If I add an expose event to the main window in the player and let the 
engine render the view on the top screen I get a transparent flash 
player where the desktop is seen through in places where there is no 
opaque pixels in the flash movie.

But if I try to use the GTK widget provided by sfwdec then the widget 
will render its own background in its own swfdec_gtk_widget_expose routine.

The basic thing I would like to do is to modify the 
swfdec_gtk_widget_expose routine to clear its own background before 
rendering the flash.

In swfdec_gtk_widget_expose:
  cairo_set_operator (cr, CAIRO_OPERATOR_CLEAR);
  cairo_paint (cr);
  swfdec_player_render (priv->player, cr);

This sequence does what I want if I put it to the expose event of the 
window created by "gtk_window_new (GTK_WINDOW_TOPLEVEL)". But it does 
not do what I want when I place it to the expose routine of the gtk widget.

I would like to pass the main window expose event to the gtk widget that 
would then render the flash. But for some reason I only get a very small 
transparent corner in the widget and the rest of the widget has an 
opaque background. It is like the sfwdec_gtk_widget would still call 
some other widget to render itself. And that destroys widget transparency.

Any ideas?
--
Regards,

Karri Kaksonen