#include <gtk/gtk.h>
#include <gdk-pixbuf/gdk-pixbuf.h>

int main(int argc, char *argv[])
{
    GdkPixbuf *pixbuf;
    GtkWidget *window, *image;
    GError *error = NULL;
    int w, h;
    char title[6];
    int i;

    gtk_init(&argc, &argv);
    gdk_pixbuf_get_file_info(argv[1], &w, &h);
    for (i=1; i <= 4; i *= 2) {
        window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
        sprintf(title, "%i %%", 100 / i);
        gtk_window_set_title(GTK_WINDOW(window), title);
        pixbuf = gdk_pixbuf_new_from_file_at_size(argv[1], w/i, h/i, &error);
        image = gtk_image_new_from_pixbuf(pixbuf);
        gtk_container_add(GTK_CONTAINER(window), image);
        g_signal_connect(window, "destroy", G_CALLBACK(gtk_main_quit), NULL);
        gtk_widget_show_all(window);
    }
    gtk_main();

    return 0;
}