[cairo] Filling using a surface is not working

[Mukund Sivaraman]

Hi all

Can anyone spot the error in the following code? It creates 'pcontext'
which is made to hold a tiling pattern, and then uses it to fill
'context' whose surface is a GtkDrawingArea. But 'pcontext' appears
nowhere on 'context' with the following code:

        cairo_t *context;
        cairo_surface_t *surface;
        cairo_t *pcontext;

        context = gdk_cairo_create (GDK_DRAWABLE (window));

        surface = cairo_surface_create_similar
                (cairo_get_group_target (context),
                 CAIRO_CONTENT_COLOR_ALPHA, 4, 4);
        pcontext = cairo_create (surface);
        cairo_surface_destroy (surface);

        cairo_new_path (pcontext);
        cairo_set_source_rgba (pcontext, 1.0, 0.0, 0.0, 0.8);
        cairo_rectangle (pcontext, 1, 1, 2, 2);
        cairo_fill (pcontext);

        cairo_set_source_surface (context, cairo_get_target (pcontext),
                                  0, 0);
        cairo_destroy (pcontext);

        cairo_move_to (context, 100.5, 100.5);
        cairo_line_to (context, 100.5, 600.5);
        cairo_line_to (context, 600.5, 600.5);
        cairo_line_to (context, 600.5, 550.5);
        cairo_line_to (context, 150.5, 550.5);
        cairo_line_to (context, 150.5, 100.5);
        cairo_line_to (context, 100.5, 100.5);
        cairo_fill (context);

		Mukund