#include <gtk/gtk.h>


static gboolean
expose_event (GtkWidget *widget, GdkEventExpose *ev)
{
    cairo_t *context;
    cairo_t *pcontext;
    cairo_surface_t *surface;

    context = gdk_cairo_create (widget->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_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_pattern_set_extend (cairo_get_source (context),
			      CAIRO_EXTEND_REPEAT);

    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);

    cairo_destroy (context);

    return FALSE;
}

int main (int argc, char **argv)
{
    GtkWidget *window, *draw;

    gtk_init (&argc, &argv);

    window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
    gtk_widget_set_size_request (window, 800, 800);
    g_signal_connect (window, "delete-event", G_CALLBACK (gtk_main_quit), NULL);

    draw = gtk_drawing_area_new ();
    g_signal_connect (draw, "expose-event", G_CALLBACK (expose_event), NULL);

    gtk_container_add (GTK_CONTAINER (window), draw);
    gtk_widget_show_all (window);

    gtk_main ();

    return 0;
}