demos/c_simple/meta_data_png.c

   1 /*****************************************************************************
   2  * This file is part of gfxprim library.                                     *
   3  *                                                                           *
   4  * Gfxprim is free software; you can redistribute it and/or                  *
   5  * modify it under the terms of the GNU Lesser General Public                *
   6  * License as published by the Free Software Foundation; either              *
   7  * version 2.1 of the License, or (at your option) any later version.        *
   8  *                                                                           *
   9  * Gfxprim is distributed in the hope that it will be useful,                *
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of            *
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU         *
  12  * Lesser General Public License for more details.                           *
  13  *                                                                           *
  14  * You should have received a copy of the GNU Lesser General Public          *
  15  * License along with gfxprim; if not, write to the Free Software            *
  16  * Foundation, Inc., 51 Franklin Street, Fifth Floor,                        *
  17  * Boston, MA  02110-1301  USA                                               *
  18  *                                                                           *
  19  * Copyright (C) 2009-2012 Cyril Hrubis <metan@ucw.cz>                       *
  20  *                                                                           *
  21  *****************************************************************************/
  22
  23  /*
  24
  25    Read png meta-data and print them into stdout.
  26
  27   */
  28
  29 #include <stdio.h>
  30 #include <string.h>
  31 #include <errno.h>
  32
  33 #include <GP.h>
  34
  35 #define SEP \
  36 "-----------------------------------------------------------------------------"
  37
  38 int main(int argc, char *argv[])
  39 {
  40         GP_MetaData *data = GP_MetaDataCreate(20);
  41         int i;
  42
  43         if (argc < 2) {
  44                 fprintf(stderr, "Takes an image(s) as parameter(s)\n");
  45                 return 1;
  46         }
  47
  48         //GP_SetDebugLevel(10);
  49
  50         for (i = 1; i < argc; i++) {
  51                 puts(SEP);
  52                 printf("Opening '%s'\n", argv[i]);
  53
  54                 GP_MetaDataClear(data);
  55
  56                 if (GP_LoadPNGMetaData(argv[i], data)) {
  57                         fprintf(stderr, "Failed to read '%s' meta-data: %s\n",
  58                                 argv[1], strerror(errno));
  59                 } else {
  60                         GP_MetaDataPrint(data);
  61                 }
  62         }
  63
  64         puts(SEP);
  65
  66         return 0;
  67 }