Gtk+实现窗体背景以及PNG透明显示

刚开始接触Gtk+，需要使用它来画出绚丽的效果，现在是第一步，实现贴图及其PNG的透明效果。以后还需要实现非规则窗体，Easy拉，这都搞掂了 ～～～ 哈哈，开心 ^_~ !!!

废话少说，上代码：

#include

int main(int argc, char *argv[])
{
    GtkWidget *window = NULL;
    GtkWidget *fixed = NULL;
    GdkPixbuf *pixbuf = NULL;
    GdkPixmap *pixmap = NULL;

    GtkWidget *eventbox;
    GtkWidget *image;
    GdkBitmap *bitmap;
    
   
    gtk_init(&argc,&argv);
   
    /* Create the window */
    window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
    gtk_window_set_title(GTK_WINDOW(window),"ZQButton  Demo");
    gtk_widget_set_app_paintable(window,TRUE);
    gtk_widget_realize (window);
    //gtk_window_fullscreen(GTK_WINDOW(window));
    gtk_widget_set_size_request(window, 800, 600);
    g_signal_connect (G_OBJECT (window), "delete_event", G_CALLBACK (gtk_main_quit), NULL);
   
    /* Set window background */
    fixed = gtk_fixed_new();
    gtk_container_add (GTK_CONTAINER(window), fixed);
    //load background
    pixbuf = gdk_pixbuf_new_from_file ("./bg.jpg",NULL);
    pixmap = gdk_pixmap_new (fixed->window, gdk_pixbuf_get_width(pixbuf), gdk_pixbuf_get_height(pixbuf), -1);
    gdk_pixbuf_render_to_drawable(pixbuf, pixmap,
                fixed->style->fg_gc[GTK_STATE_NORMAL],
                0,0,0,0,
                gdk_pixbuf_get_width(pixbuf),
                gdk_pixbuf_get_height(pixbuf),
                GDK_RGB_DITHER_NORMAL,0,0);
    g_object_unref(pixbuf);
    //set background
    gdk_window_set_back_pixmap (fixed->window, pixmap, FALSE);
    gtk_widget_show(fixed);
   
    /* Create the eventbox */
    eventbox = gtk_event_box_new();
    gtk_fixed_put (GTK_FIXED (fixed), eventbox, 20, 20);
    pixbuf = gdk_pixbuf_new_from_file ("./test.png", NULL);
    image = gtk_image_new_from_pixbuf (pixbuf);
    //NOTE: Here is very important
    gdk_pixbuf_render_pixmap_and_mask(pixbuf, &pixmap, &bitmap, 128);
    gtk_widget_shape_combine_mask(eventbox, bitmap, 0, 0);
    gtk_container_add(GTK_CONTAINER(eventbox), image);
    gtk_widget_show(image);
    gtk_widget_show(eventbox);
   
    gtk_widget_show(window);
    gtk_main();
    return FALSE;
}

不过png透明效果不怎么好，边缘有毛刺～～～再找找其他更好的办法