如何在GTK+中显示具有不同语言方向的文本？

#include <gtk/gtk.h>
#include <pango/pango.h>

static gboolean draw_text(GtkWidget *widget, cairo_t *cr, gpointer data)
{
    PangoLayout *layout = (PangoLayout *)data;
    pango_cairo_show_layout(cr, layout);
    return FALSE;
}

int main(int argc, char *argv[])
{
    gtk_init(&argc, &argv);

    GtkWidget *window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
    gtk_window_set_default_size(GTK_WINDOW(window), 200, 100);
    g_signal_connect(window, "destroy", G_CALLBACK(gtk_main_quit), NULL);

    GtkWidget *drawing_area = gtk_drawing_area_new();
    gtk_container_add(GTK_CONTAINER(window), drawing_area);

    PangoLayout *layout = gtk_widget_create_pango_layout(drawing_area, NULL);
    PangoFontDescription *font_desc = pango_font_description_from_string("Arial 12");
    pango_layout_set_font_description(layout, font_desc);
    pango_font_description_free(font_desc);

    const gchar *text = "Hello 你好 مرحبا שלום";
    pango_layout_set_text(layout, text, -1);

    g_signal_connect(drawing_area, "draw", G_CALLBACK(draw_text), layout);

    gtk_widget_show_all(window);
    gtk_main();

    return 0;
}