/*  RetroArch - A frontend for libretro.
 *  Copyright (C) 2010-2014 - Hans-Kristian Arntzen
 * 
 *  RetroArch is free software: you can redistribute it and/or modify it under the terms
 *  of the GNU General Public License as published by the Free Software Found-
 *  ation, either version 3 of the License, or (at your option) any later version.
 *
 *  RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 *  without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 *  PURPOSE.  See the GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along with RetroArch.
 *  If not, see <http://www.gnu.org/licenses/>.
 */

#include "rpng.h"
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <Imlib2.h>

int main(int argc, char *argv[])
{
   if (argc > 2)
   {
      fprintf(stderr, "Usage: %s <png file>\n", argv[0]);
      return 1;
   }

   const char *in_path = argc == 2 ? argv[1] : "/tmp/test.png";

   const uint32_t test_data[] = {
      0xff000000 | 0x50, 0xff000000 | 0x80, 0xff000000 | 0x40, 0xff000000 | 0x88,
      0xff000000 | 0x50, 0xff000000 | 0x80, 0xff000000 | 0x40, 0xff000000 | 0x88,
      0xff000000 | 0xc3, 0xff000000 | 0xd3, 0xff000000 | 0xc3, 0xff000000 | 0xd3,
      0xff000000 | 0xc3, 0xff000000 | 0xd3, 0xff000000 | 0xc3, 0xff000000 | 0xd3,
   };

   if (!rpng_save_image_argb("/tmp/test.png", test_data, 4, 4, 16))
      return 1;

   uint32_t *data = NULL;
   unsigned width = 0;
   unsigned height = 0;

   if (!rpng_load_image_argb(in_path, &data, &width, &height))
      return 2;

   fprintf(stderr, "Path: %s.\n", in_path);
   fprintf(stderr, "Got image: %u x %u.\n", width, height);

#if 0
   fprintf(stderr, "\nRPNG:\n");
   for (unsigned h = 0; h < height; h++)
   {
      for (unsigned w = 0; w < width; w++)
         fprintf(stderr, "[%08x] ", data[h * width + w]);
      fprintf(stderr, "\n");
   }
#endif

   // Validate with imlib2 as well.
   Imlib_Image img = imlib_load_image(in_path);
   if (!img)
      return 4;

   imlib_context_set_image(img);
   width  = imlib_image_get_width();
   height = imlib_image_get_width();
   const uint32_t *imlib_data = imlib_image_get_data_for_reading_only();

#if 0
   fprintf(stderr, "\nImlib:\n");
   for (unsigned h = 0; h < height; h++)
   {
      for (unsigned w = 0; w < width; w++)
         fprintf(stderr, "[%08x] ", imlib_data[h * width + w]);
      fprintf(stderr, "\n");
   }
#endif

   if (memcmp(imlib_data, data, width * height * sizeof(uint32_t)) != 0)
   {
      fprintf(stderr, "Imlib and RPNG differs!\n");
      return 5;
   }
   else
      fprintf(stderr, "Imlib and RPNG are equivalent!\n");

   imlib_free_image();
   free(data);
}