/*
 *
 * Test file encode/decode operations via write/read/write/read
 * sequence to detect any data corruption problems.  This does not
 * verify that the image is correct, only that encode/decode process
 * is repeatable.
 *
 * Written by Bob Friesenhahn <bfriesen@simple.dallas.tx.us>
 *
 * The image returned by both reads must be identical (or deemed close
 * enough) in order for the test to pass.
 * */

#include <magick/api.h>

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main ( int argc, char **argv )
{
  Image
    *final = (Image *) NULL,
    *original = (Image *) NULL;

  const MagickInfo
    *magick_info;

  char
    filename[80],
    format[MaxTextExtent],
    infile[MaxTextExtent],
    size[MaxTextExtent];

  int
    arg = 1,
    exit_status = 0,
    rows = 0,
    columns = 0,
    pause = 0;

  MagickBool
    check = MagickTrue;

  double
    fuzz_factor = 0;

  ImageInfo
    *imageInfo;

  ExceptionInfo
    exception;

  if (LocaleNCompare("rwfile",argv[0],7) == 0)
    InitializeMagick((char *) NULL);
  else
    InitializeMagick(*argv);

  imageInfo=CloneImageInfo(0);
  GetExceptionInfo( &exception );

  for (arg=1; arg < argc; arg++)
    {
      char
        *option = argv[arg];
    
      if (*option == '-')
        {
          if (LocaleCompare("compress",option+1) == 0)
            {
              arg++;
              option=argv[arg];
              imageInfo->compression=UndefinedCompression;
              if (LocaleCompare("None",option) == 0)
                imageInfo->compression=NoCompression;
              if (LocaleCompare("BZip",option) == 0)
                imageInfo->compression=BZipCompression;
              if (LocaleCompare("Fax",option) == 0)
                imageInfo->compression=FaxCompression;
              if (LocaleCompare("Group4",option) == 0)
                imageInfo->compression=Group4Compression;
              if (LocaleCompare("JPEG",option) == 0)
                imageInfo->compression=JPEGCompression;
              if (LocaleCompare("Lossless",option) == 0)
                imageInfo->compression=LosslessJPEGCompression;
              if (LocaleCompare("LZW",option) == 0)
                imageInfo->compression=LZWCompression;
              if (LocaleCompare("RLE",option) == 0)
                imageInfo->compression=RLECompression;
              if (LocaleCompare("Zip",option) == 0)
                imageInfo->compression=ZipCompression;
            }
          else if (LocaleCompare("debug",option+1) == 0)
            {
              (void) SetLogEventMask(argv[++arg]);
            }
          else if (LocaleCompare("depth",option+1) == 0)
            {
              imageInfo->depth=QuantumDepth;
              arg++;
              if ((arg == argc) || !sscanf(argv[arg],"%ld",&imageInfo->depth))
                {
                  (void) printf("-depth argument missing or not integer\n");
                  (void) fflush(stdout);
                  exit_status = 1;
                  goto program_exit;
                }
              if(imageInfo->depth != 8 && imageInfo->depth != 16 && imageInfo->depth != 32)
                {
                  (void) printf("-depth (%ld) not 8, 16, or 32\n", imageInfo->depth);
                  (void) fflush(stdout);
                  exit_status = 1;
                  goto program_exit;
                }
            }
          else if (LocaleCompare("log",option+1) == 0)
            {
              (void) SetLogFormat(argv[++arg]);
            }
          else if (LocaleCompare("nocheck",option+1) == 0)
            {
              check=MagickFalse;
            }
          else if (LocaleCompare("pause",option+1) == 0)
            {
              pause=1;
            }
          else if (LocaleCompare("size",option+1) == 0)
            {
              arg++;
              if ((arg == argc) || !IsGeometry(argv[arg]))
                {
                  (void) printf("-size argument missing or not geometry\n");
                  (void) fflush(stdout);
                  exit_status = 1;
                  goto program_exit;
                }
              (void) CloneString(&imageInfo->size,argv[arg]);
            }
          else if (LocaleCompare("verbose",option+1) == 0)
            {
              imageInfo->verbose+=1;
            }
        }
      else
        {
          break;
        }
    }
  if (arg != argc-2)
    {
      (void) printf("arg=%d, argc=%d\n", arg, argc);
      (void) printf ( "Usage: %s [-compress algorithm -debug events -depth integer -log format -nocheck -size geometry -verbose] infile format\n", argv[0] );
      (void) fflush(stdout);
      exit_status = 1;
      goto program_exit;
    }
  
  (void) strncpy(infile, argv[arg], MaxTextExtent-1 );
  arg++;
  (void) strncpy( format, argv[arg], MaxTextExtent-1 );

  /*   for (arg=0; arg < argc; arg++) */
  /*     (void) printf("%s ", argv[arg]); */
  /*   (void) printf("\n"); */
  /*   (void) fflush(stdout); */

  /*
   * Read original image
   */

  imageInfo->dither = 0;
  (void) strncpy( imageInfo->filename, infile, MaxTextExtent-1 );
  (void) fflush(stdout);
  (void) LogMagickEvent(CoderEvent,GetMagickModule(),
                        "Reading image %s", imageInfo->filename);
  original = ReadImage ( imageInfo, &exception );
  if (exception.severity != UndefinedException)
    {
      CatchException(&exception);
      exit_status = 1;
      goto program_exit;
    }
  if ( original == (Image *)NULL )
    {
      (void) printf ( "Failed to read original image %s\n", imageInfo->filename );
      (void) fflush(stdout);
      exit_status = 1;
      goto program_exit;
    }

  /*
   * Obtain original image size if format requires it
   */
  rows    = original->rows;
  columns = original->columns;
  size[0] = '\0';
  magick_info=GetMagickInfo(format,&exception);
  if (magick_info && magick_info->raw)
    FormatString( size, "%dx%d", columns, rows );

  /*
   * Save image to file
   */
  (void) sprintf( filename, "out_1.%s", format );
  (void) strncpy( original->magick, format, MaxTextExtent-1 );
  (void) strncpy( original->filename, filename, MaxTextExtent-1 );
  original->delay = 10;
  (void) fflush(stdout);
  (void) LogMagickEvent(CoderEvent,GetMagickModule(),
                        "Writing image %s", original->filename);
  if (!WriteImage ( imageInfo, original ))
    {
      CatchException(&original->exception);
      exit_status = 1;
      goto program_exit;
    }
  imageInfo->depth=original->depth;
  DestroyImageList( original );
  original = (Image*)NULL;

  /*
   * Read image back from file
   */
  (void) strncpy( imageInfo->magick, format, MaxTextExtent-1 );
  strncpy( imageInfo->filename, filename, MaxTextExtent-1 );
  if ( size[0] != '\0' )
    (void) CloneString( &imageInfo->size, size );
  (void) fflush(stdout);
  original = ReadImage ( imageInfo, &exception );
  if (exception.severity != UndefinedException)
    {
      CatchException(&exception);
      exit_status = 1;
      goto program_exit;
    }
  if ( original == (Image *)NULL )
    {
      (void) printf ( "Failed to read image from file in format %s\n",
                      imageInfo->magick );
      (void) fflush(stdout);
      exit_status = 1;
      goto program_exit;
    }

  /*
   * Save image to file
   */
  (void) sprintf( filename, "out_2.%s", format );
  (void) strncpy( original->magick, format, MaxTextExtent-1 );
  (void) strncpy( original->filename, filename, MaxTextExtent-1 );
  original->delay = 10;
  (void) fflush(stdout);
  if(!WriteImage (imageInfo,original))
    {
      CatchException(&original->exception);
      exit_status = 1;
      goto program_exit;
    }

  /*
   * Read image back from file
   */
  (void) strncpy( imageInfo->magick, format, MaxTextExtent-1 );
  (void) strncpy( imageInfo->filename, filename, MaxTextExtent-1 );
  if ( size[0] != '\0' )
    (void) CloneString( &imageInfo->size, size );
  (void) fflush(stdout);
  (void) LogMagickEvent(CoderEvent,GetMagickModule(),
                        "Reading image %s", imageInfo->filename);
  final = ReadImage ( imageInfo, &exception );
  if (exception.severity != UndefinedException)
    {
      CatchException(&exception);
      exit_status = 1;
      goto program_exit;
    }
  if ( final == (Image *)NULL )
    {
      (void) printf ( "Failed to read image from file in format %s\n",
                      imageInfo->magick );
      (void) fflush(stdout);
      exit_status = 1;
      goto program_exit;
    }

  if (check)
    {
      /*
       * Check final output
       */

      if ((!strcmp( "CIN", format ) && (QuantumDepth == 8)) ||
          (!strcmp( "CMYK", format )) ||
          (!strcmp( "GRAY", format )) ||
          (!strcmp( "JNG", format )) ||
          (!strcmp( "JP2", format )) ||
          (!strcmp( "JPEG", format )) ||
          (!strcmp( "JPG", format )) ||
          (!strcmp( "JPG24", format )) ||
          (!strcmp( "PAL", format )) ||
          (!strcmp( "PCD", format )) ||
          (!strcmp( "PCDS", format )) ||
          (!strcmp( "UYVY", format )) ||
          (!strcmp( "YUV", format )) ||
          (final->compression == JPEGCompression))
        fuzz_factor = 0.06;

      if ( !IsImagesEqual(original, final ) &&
           (original->error.normalized_mean_error > fuzz_factor) )
        {
          (void) printf( "R/W file check for format \"%s\" failed: %u/%.6f/%.6fe\n",
                         format,(unsigned int) original->error.mean_error_per_pixel,
                         original->error.normalized_mean_error,
                         original->error.normalized_maximum_error);
          (void) fflush(stdout);
          exit_status = 1;
          goto program_exit;
        }
    }

 program_exit:
  if (original)
    DestroyImageList( original );
  original = (Image*)NULL;
  if (final)
    DestroyImageList( final );
  final = (Image*)NULL;

  DestroyExceptionInfo(&exception);
  DestroyImageInfo( imageInfo );
  DestroyMagick();

  if (pause)
    (void) getc(stdin);
  return exit_status;
}
