This example will show you how to load an image using evas and fill a swallow with it.
It's basically almost like the last example, but with a minor change.
This variables are used to store the name of the image that is going to be used, the path to it and a variable that will store the error cause if something goes wrong.
Here it is:  
   const char  *edje_file = PACKAGE_DATA_DIR"/swallow.edj";
   const char  *img_file = PACKAGE_DATA_DIR"/bubble.png";
   Evas_Load_Error err;
Then we load the image with this command:
   img = evas_object_image_filled_add(evas);
   evas_object_image_file_set(img, img_file, NULL);
To check if we had some problem we use:
   err = evas_object_image_load_error_get(img);
   if (err != EVAS_LOAD_ERROR_NONE)
   {
      fprintf(stderr, "could not load image '%s'. error string is \"%s\"\n",
     goto shutdown_edje;
   }
Now we are going to swallow it and check if worked. If you notice we are using "part_one" as argument. We do this because we must explicit what part of our .edc file we want to swallow:
   edje_object_part_swallow(edje_obj, "part_one", img);
   obj = edje_object_part_swallow_get(edje_obj, "part_one");
   if(obj == img)
      printf("Swallowing worked!\n");
The example's window should look like this picture:
  The complete .edc file: 
collections {
   group {
      name: "example_group";
      max: 500 500;
      min: 50 50;
      parts {
         part {
            name: "part_one";
            type: SWALLOW;
            description {
               min: 50 50;
               state: "default" 0.0;
               rel1.relative: 0.0 0.0;
               rel2.relative: 1.0 1.0;
            }
         }
      }
   }
}
And the source code: 
#ifdef HAVE_CONFIG_H
# include "config.h"
#else
# define EINA_UNUSED
#endif
#ifndef PACKAGE_DATA_DIR
#define PACKAGE_DATA_DIR "."
#endif
#include <Ecore.h>
#define WIDTH  (300)
#define HEIGHT (300)
static void
_on_delete(Ecore_Evas *ee EINA_UNUSED)
{
}
int
main(int argc EINA_UNUSED, char *argv[] EINA_UNUSED)
{
   const char  *edje_file = PACKAGE_DATA_DIR"/swallow.edj";
   const char  *img_file = PACKAGE_DATA_DIR"/bubble.png";
   Ecore_Evas  *ee;
   Evas_Load_Error err;
     return EXIT_FAILURE;
     goto shutdown_ecore_evas;
   
   if (!ee) goto shutdown_edje;
   evas_object_move(bg, 0, 0); 
   evas_object_resize(bg, WIDTH, HEIGHT); 
   edje_obj = edje_object_add(evas);
   edje_object_file_set(edje_obj, edje_file, "example_group");
   evas_object_move(edje_obj, 20, 20);
   evas_object_resize(edje_obj, WIDTH - 40, HEIGHT - 40);
   img = evas_object_image_filled_add(evas);
   evas_object_image_file_set(img, img_file, NULL);
   err = evas_object_image_load_error_get(img);
   if (err != EVAS_LOAD_ERROR_NONE)
   {
      fprintf(stderr, "could not load image '%s'. error string is \"%s\"\n",
     goto shutdown_edje;
   }
   edje_object_part_swallow(edje_obj, "part_one", img);
   obj = edje_object_part_swallow_get(edje_obj, "part_one");
   if(obj == img)
      printf("Swallowing worked!\n");
   return EXIT_SUCCESS;
 shutdown_edje:
 shutdown_ecore_evas:
   return EXIT_FAILURE;
}
To compile use this command: 
* gcc -o edje-swallow2 edje-swallow2.c -DPACKAGE_BIN_DIR=\"/Where/enlightenment/is/installed/bin\"
* -DPACKAGE_LIB_DIR=\"/Where/enlightenment/is/installed/lib\"
* -DPACKAGE_DATA_DIR=\"/Where/enlightenment/is/installed/share\"
* `pkg-config --cflags --libs evas ecore ecore-evas edje`
*
* edje_cc swallow.edc
*