/* Compile with gcc -g -Wall `gtk-config --cflags --libs` -o tile tile.c */

#include <gtk/gtk.h>
#include <gdk/gdkx.h>

static gboolean
expose (GtkWidget *widget, GdkEventExpose *event)
{
  GtkStyle *style = widget->style;
  Pixmap pm;
  GC fillgc;
  Window window = GDK_WINDOW_XWINDOW (widget->window);
  Display *xdisplay = GDK_WINDOW_XDISPLAY (widget->window);
  XGCValues values;
  GC whitegc = GDK_GC_XGC (style->white_gc);
  GC blackgc = GDK_GC_XGC (style->black_gc);
  GC lightgc = GDK_GC_XGC (style->bg_gc[GTK_STATE_PRELIGHT]);

  int width = widget->allocation.width;
  int height = widget->allocation.height;

  pm = XCreatePixmap (xdisplay, window, 4, 4, DefaultDepth (xdisplay, DefaultScreen (xdisplay)));

  XFillRectangle (xdisplay, pm, whitegc, 0, 0, 4, 4);

  XDrawPoint (xdisplay, pm, blackgc, 0, 0);
  XDrawPoint (xdisplay, pm, lightgc, 1, 1);
  XDrawPoint (xdisplay, pm, blackgc, 2, 2);
  XDrawPoint (xdisplay, pm, lightgc, 3, 3);

  values.fill_style = FillTiled;
  values.tile = pm;
  fillgc = XCreateGC (xdisplay, window, GCFillStyle | GCTile, &values);

  XFillRectangle (xdisplay, window, fillgc, 0, 0, width, height);

  XFreeGC (xdisplay, fillgc);
  XFreePixmap (xdisplay, pm);

  return FALSE;
}

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

  window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  gtk_widget_set_app_paintable (window, TRUE);
  gtk_signal_connect (GTK_OBJECT (window), "expose_event", GTK_SIGNAL_FUNC (expose), NULL);

  gtk_widget_show_all (window);

  gtk_main ();

  return 0;
}