gdk_draw_pixbuf出错了，怎么办？
pixbuf=gdk_pixbuf_new_from_file("./meigui.png",NULL);bitmap=(GdkBitmap*)gdk_pixmap_new(NULL,width,height,1);
gc=gdk_gc_new(bitmap);
gdk_draw_pixbuf(bitmap,gc,pixbuf,0,0,0,0,200,200,GDK_RGB_DITHER_NORMAL,0,0);
gtk_widget_shape_combine_mask(widget,bitmap,0,0);
gtk_widget_show(widget);
大至程序就上面，编译能过，运行没反应，提示
The gdk_draw_*_image require the drawable argument to have a specified colormap.All windows have a colormap,however, pixmaps only have colormap by default if they were created with a non-NULL window argument. Otherwise a colormap must be set on them with gdk_drawable_set_colormap
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