Not work "gdk_imlib_copy_image"! why?

[유대상]

/*

 *     Usage : test <filename>

 *

 */

 

 

 

#include <gdk_imlib.h>
#include <gdk/gdk.h>

 

int main(int argc, char **argv)
  {

 

/* Be nice and tell the user if they don't, to provide a file as an arg */
    if (argc<=1)
      {
        printf("Usage:\n %s image_file\n",argv[0]);
        exit(1);
      }
/* Inititalise GDK */
    gdk_init(&argc,&argv);
/* Immediately after initialising GDK, Initialise Imlib */
    gdk_imlib_init();

 

/* Get gdk to use imlib's visual and colormap */
   gtk_widget_push_visual(gdk_imlib_get_visual());
   gtk_widget_push_colormap(gdk_imlib_get_colormap());
  
/* Load the image specified as the first argument */
    im=gdk_imlib_load_image(argv[1]);
    
/* Copy to a pixmap */    
    testpixmap=gdk_imlib_copy_image(im);
  
   if(testpixmap==0x00)/********************  why does it return NULL? ***********************************/
   {
      g_print("any error is occured - testpixmap==0x00\r\n");
   }
  

  }