GDK to Cairo move

[Emmanuel Thomas-Maurin <manutm007 gmail com>]

Good day list!

In my app, I'm currently replacing deprecated GDK code with Cairo code
and I have problems with the following:

(The code is inside a timeout handler and involves drawing part of a GDK
pixmap onto a drawing area.)

/* gdk code */
gdk_draw_drawable(GDK_DRAWABLE(drawing_area->window),  gc, pixmap, \
        x, 0, 0, 0, drw_a_width, drw_a_height);

/* cairo code */
cr = gdk_cairo_create(GDK_DRAWABLE(drawing_area->window));
gdk_cairo_set_source_pixmap(cr, pixmap, 0, 0);
cairo_rectangle(cr, x, 0, drw_a_width, drw_a_height);
cairo_fill(cr);
cairo_destroy(cr);

What am I missing?
(The Cairo doc is somewhat spartan...)
Thanks.

-- 
Emmanuel Thomas-Maurin <manutm007 gmail com>