Image Magick

ImageMagick-6.1.1/coders/meta.c

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/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%                        M   M  EEEEE  TTTTT   AAA                            %
%                        MM MM  E        T    A   A                           %
%                        M M M  EEE      T    AAAAA                           %
%                        M   M  E        T    A   A                           %
%                        M   M  EEEEE    T    A   A                           %
%                                                                             %
%                                                                             %
%                    Read/Write Embedded Image Profiles.                      %
%                                                                             %
%                              Software Design                                %
%                             William Radcliffe                               %
%                                 July 2001                                   %
%                                                                             %
%                                                                             %
%  Copyright 1999-2004 ImageMagick Studio LLC, a non-profit organization      %
%  dedicated to making software imaging solutions freely available.           %
%                                                                             %
%  You may not use this file except in compliance with the License.  You may  %
%  obtain a copy of the License at                                            %
%                                                                             %
%    http://www.imagemagick.org/www/Copyright.html                            %
%                                                                             %
%  Unless required by applicable law or agreed to in writing, software        %
%  distributed under the License is distributed on an "AS IS" BASIS,          %
%  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.   %
%  See the License for the specific language governing permissions and        %
%  limitations under the License.                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%
*/

/*
  Include declarations.
*/
#include "magick/studio.h"
#include "magick/blob.h"
#include "magick/blob_private.h"
#include "magick/error.h"
#include "magick/error_private.h"
#include "magick/image.h"
#include "magick/image_private.h"
#include "magick/list.h"
#include "magick/magick.h"
#include "magick/memory_.h"
#include "magick/profile.h"
#include "magick/static.h"
#include "magick/string_.h"
#include "magick/token.h"
#include "magick/utility.h"

/*
  Forward declarations.
*/
static MagickBooleanType
  WriteMETAImage(const ImageInfo *,Image *);

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   I s M E T A                                                               %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  IsMETA() returns MagickTrue if the image format type, identified by the
%  magick string, is META.
%
%  The format of the IsMETA method is:
%
%      MagickBooleanType IsMETA(const unsigned char *magick,const size_t length)
%
%  A description of each parameter follows:
%
%    o magick: This string is generally the first few bytes of an image file
%      or blob.
%
%    o length: Specifies the length of the magick string.
%
%
*/
#ifdef IMPLEMENT_IS_FUNCTION
static MagickBooleanType IsMETA(const unsigned char *magick,const size_t length)
{
  if (length < 4)
    return(MagickFalse);
  if (LocaleNCompare((char *) magick,"8BIM",4) == 0)
    return(MagickTrue);
  if (LocaleNCompare((char *) magick,"APP1",4) == 0)
    return(MagickTrue);
  if (LocaleNCompare((char *) magick,"\034\002",2) == 0)
    return(MagickTrue);
  return(MagickFalse);
}
#endif

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   R e a d M E T A I m a g e                                                 %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  ReadMETAImage() reads a META image file and returns it.  It
%  allocates the memory necessary for the new Image structure and returns a
%  pointer to the new image.
%
%  The format of the ReadMETAImage method is:
%
%      Image *ReadMETAImage(const ImageInfo *image_info,
%        ExceptionInfo *exception)
%
%  Decompression code contributed by Kyle Shorter.
%
%  A description of each parameter follows:
%
%    o image: Method ReadMETAImage returns a pointer to the image after
%      reading.  A null image is returned if there is a memory shortage or
%      if the image cannot be read.
%
%    o image_info: Specifies a pointer to an ImageInfo structure.
%
%    o exception: return any errors or warnings in this structure.
%
%
*/
#define BUFFER_SZ 4096

typedef struct _html_code
{
  short
    len;
  const char
    *code,
    val;
} html_code;

static html_code html_codes[] = {
#ifdef HANDLE_GT_LT
  { 4,"&lt;",'<' },
  { 4,"&gt;",'>' },
#endif
  { 5,"&amp;",'&' },
  { 6,"&quot;",'"' },
  { 6,"&apos;",'\''}
};

static int stringnicmp(const char *p,const char *q,size_t n)
{
  register long
    i,
    j;

  if (p == q)
    return(0);
  if (p == (char *) NULL)
    return(-1);
  if (q == (char *) NULL)
    return(1);
  while ((*p != '\0') && (*q != '\0'))
  {
    if ((*p == '\0') || (*q == '\0'))
      break;
    i=(*p);
    if (islower(i))
      i=toupper(i);
    j=(*q);
    if (islower(j))
      j=toupper(j);
    if (i != j)
      break;
    n--;
    if (n == 0)
      break;
    p++;
    q++;
  }
  return(toupper(*p)-toupper(*q));
}

static int convertHTMLcodes(char *s, int len)
{
  if (len <=0 || s==(char*)NULL || *s=='\0')
    return 0;

  if (s[1] == '#')
    {
      int val, o;

      if (sscanf(s,"&#%d;",&val) == 1)
      {
        o = 3;
        while (s[o] != ';')
        {
          o++;
          if (o > 5)
            break;
        }
        if (o < 6)
          (void) strcpy(s+1, s+1+o);
        *s = val;
        return o;
      }
    }
  else
    {
      int
        i,
        codes = sizeof(html_codes) / sizeof(html_code);

      for (i=0; i < codes; i++)
      {
        if (html_codes[i].len <= len)
          if (stringnicmp(s, html_codes[i].code, html_codes[i].len) == 0)
            {
              (void) strcpy(s+1, s+html_codes[i].len);
              *s = html_codes[i].val;
              return html_codes[i].len-1;
            }
      }
    }
  return 0;
}

static char *super_fgets(char **b, int *blen, Image *file)
{
  int
    c,
    len;

  unsigned char
    *p,
    *q;

  len=*blen;
  p=(unsigned char *) (*b);
  for (q=p; ; q++)
  {
    c=ReadBlobByte(file);
    if (c == EOF || c == '\n')
      break;
    if ((q-p+1) >= (int) len)
      {
        int
          tlen;

        tlen=q-p;
        len<<=1;
        p=(unsigned char *) ResizeMagickMemory(p,(len+2));
        *b=(char *) p;
        if (p == (unsigned char *) NULL)
          break;
        q=p+tlen;
      }
    *q=(unsigned char) c;
  }
  *blen=0;
  if (p != (unsigned char *) NULL)
    {
      int
        tlen;

      tlen=q-p;
      if (tlen == 0)
        return (char *) NULL;
      p[tlen] = '\0';
      *blen=++tlen;
    }
  return((char *) p);
}

#define BUFFER_SZ 4096
#define IPTC_ID 1028
#define THUMBNAIL_ID 1033

static long parse8BIM(Image *ifile, Image *ofile)
{
  char
    brkused,
    quoted,
    *line,
    *token,
    *newstr,
    *name;

  int
    state,
    next;

  unsigned char
    dataset;

  unsigned int
    recnum;

  int
    inputlen = BUFFER_SZ;

  long
    savedolen = 0L,
    outputlen = 0L;

  MagickOffsetType
    savedpos,
    currentpos;

  TokenInfo
    token_info;

  dataset = 0;
  recnum = 0;
  line = (char *) AcquireMagickMemory(inputlen);
  name = token = (char *)NULL;
  savedpos = 0;
  while(super_fgets(&line,&inputlen,ifile)!=NULL)
  {
    state=0;
    next=0;

    token = (char *) AcquireMagickMemory(inputlen);
    newstr = (char *) AcquireMagickMemory(inputlen);
    while (Tokenizer(&token_info, 0, token, inputlen, line,
          (char *) "", (char *) "=",
      (char *) "\"", 0, &brkused,&next,&quoted)==0)
    {
      if (state == 0)
        {
          int
            state,
            next;

          char
            brkused,
            quoted;

          state=0;
          next=0;
          while(Tokenizer(&token_info, 0, newstr, inputlen, token, (char *) "",
            (char *) "#", (char *) "", 0, &brkused, &next, &quoted)==0)
          {
            switch (state)
            {
              case 0:
                if (strcmp(newstr,"8BIM")==0)
                  dataset = 255;
                else
                  dataset = (unsigned char) atoi(newstr);
                break;
              case 1:
                recnum = atoi(newstr);
                break;
              case 2:
                name=(char *) AcquireMagickMemory(strlen(newstr)+MaxTextExtent);
                if (name)
                  (void) strcpy(name,newstr);
                break;
            }
            state++;
          }
        }
      else
        if (state == 1)
          {
            int
              next;

            unsigned long
              len;

            char
              brkused,
              quoted;

            next=0;
            len = strlen(token);
            while (Tokenizer(&token_info,0, newstr, inputlen, token, (char *) "",
              (char *) "&", (char *) "", 0, &brkused, &next, &quoted)==0)
            {
              if (brkused && next > 0)
                {
                  char
                    *s = &token[next-1];

                  len -= convertHTMLcodes(s, strlen(s));
                }
            }

            if (dataset == 255)
              {
                unsigned char
                  nlen = 0;

                int
                  i;

                if (savedolen > 0)
                  {
                    long diff = outputlen - savedolen;
                    currentpos = TellBlob(ofile);
                    SeekBlob(ofile,savedpos,SEEK_SET);
                    WriteBlobMSBLong(ofile,diff);
                    SeekBlob(ofile,currentpos,SEEK_SET);
                    savedolen = 0L;
                  }
                if (outputlen & 1)
                  {
                    WriteBlobByte(ofile,0x00);
                    outputlen++;
                  }
                WriteBlobString(ofile,"8BIM");
                WriteBlobMSBShort(ofile,recnum);
                outputlen += 6;
                if (name)
                  nlen = strlen(name);
                WriteBlobByte(ofile,nlen);
                outputlen++;
                for (i=0; i<nlen; i++)
                  WriteBlobByte(ofile,name[i]);
                outputlen += nlen;
                if ((nlen & 0x01) == 0)
                  {
                    WriteBlobByte(ofile,0x00);
                    outputlen++;
                  }
                if (recnum != IPTC_ID)
                  {
                    WriteBlobMSBLong(ofile, len);
                    outputlen += 4;

                    next=0;
                    outputlen += len;
                    while (len--)
                      WriteBlobByte(ofile,token[next++]);

                    if (outputlen & 1)
                      {
                        WriteBlobByte(ofile,0x00);
                        outputlen++;
                      }
                  }
                else
                  {
                    /* patch in a fake length for now and fix it later */
                    savedpos = TellBlob(ofile);
                    WriteBlobMSBLong(ofile,0xFFFFFFFFUL);
                    outputlen += 4;
                    savedolen = outputlen;
                  }
              }
            else
              {
                if (len <= 0x7FFF)
                  {
                    WriteBlobByte(ofile,0x1c);
                    WriteBlobByte(ofile,dataset);
                    WriteBlobByte(ofile,recnum & 255);
                    WriteBlobMSBShort(ofile,len);
                    outputlen += 5;
                    next=0;
                    outputlen += len;
                    while (len--)
                      WriteBlobByte(ofile,token[next++]);
                  }
              }
          }
      state++;
    }
    token=(char *) RelinquishMagickMemory(token);
    newstr=(char *) RelinquishMagickMemory(newstr);
    name=(char *) RelinquishMagickMemory(name);
  }
  line=(char *) RelinquishMagickMemory(line);
  if (savedolen > 0)
    {
      long diff = outputlen - savedolen;

      currentpos = TellBlob(ofile);
      SeekBlob(ofile,savedpos,SEEK_SET);
      WriteBlobMSBLong(ofile,diff);
      SeekBlob(ofile,currentpos,SEEK_SET);
      savedolen = 0L;
    }
  return outputlen;
}

static char *super_fgets_w(char **b, int *blen, Image *file)
{
  int
    c,
    len;

  unsigned char
    *p,
    *q;

  len=*blen;
  p=(unsigned char *) (*b);
  for (q=p; ; q++)
  {
    c=ReadBlobLSBShort(file);
    if (c == ((unsigned short) ~0) || c == '\n')
      break;
   if (EOFBlob(file))
      break;
   if ((q-p+1) >= (int) len)
      {
        int
          tlen;

        tlen=q-p;
        len<<=1;
        p=(unsigned char *) ResizeMagickMemory(p,(len+2));
        *b=(char *) p;
        if (p == (unsigned char *) NULL)
          break;
        q=p+tlen;
      }
    *q=(unsigned char) c;
  }
  *blen=0;
  if ((*b) != (char *) NULL)
    {
      int
        tlen;

      tlen=q-p;
      if (tlen == 0)
        return (char *) NULL;
      p[tlen] = '\0';
      *blen=++tlen;
    }
  return((char *) p);
}

static long parse8BIMW(Image *ifile, Image *ofile)
{
  char
    brkused,
    quoted,
    *line,
    *token,
    *newstr,
    *name;

  int
    state,
    next;

  unsigned char
    dataset;

  unsigned int
    recnum;

  int
    inputlen = BUFFER_SZ;

  long
    savedolen = 0L,
    outputlen = 0L;

  MagickOffsetType
    savedpos,
    currentpos;

  TokenInfo
    token_info;

  dataset = 0;
  recnum = 0;
  line = (char *) AcquireMagickMemory(inputlen);
  name = token = (char *)NULL;
  savedpos = 0;
  while(super_fgets_w(&line,&inputlen,ifile)!=NULL)
  {
    state=0;
    next=0;

    token = (char *) AcquireMagickMemory(inputlen);
    newstr = (char *) AcquireMagickMemory(inputlen);
    while (Tokenizer(&token_info, 0, token, inputlen, line,
          (char *) "", (char *) "=",
      (char *) "\"", 0, &brkused,&next,&quoted)==0)
    {
      if (state == 0)
        {
          int
            state,
            next;

          char
            brkused,
            quoted;

          state=0;
          next=0;
          while(Tokenizer(&token_info, 0, newstr, inputlen, token, (char *) "",
            (char *) "#", (char *) "", 0, &brkused, &next, &quoted)==0)
          {
            switch (state)
            {
              case 0:
                if (strcmp(newstr,"8BIM")==0)
                  dataset = 255;
                else
                  dataset = (unsigned char) atoi(newstr);
                break;
              case 1:
                recnum = atoi(newstr);
                break;
              case 2:
                name=(char *) AcquireMagickMemory(strlen(newstr)+MaxTextExtent);
                if (name)
                  (void) strcpy(name,newstr);
                break;
            }
            state++;
          }
        }
      else
        if (state == 1)
          {
            int
              next;

            unsigned long
              len;

            char
              brkused,
              quoted;

            next=0;
            len = strlen(token);
            while (Tokenizer(&token_info,0, newstr, inputlen, token, (char *) "",
              (char *) "&", (char *) "", 0, &brkused, &next, &quoted)==0)
            {
              if (brkused && next > 0)
                {
                  char
                    *s = &token[next-1];

                  len -= convertHTMLcodes(s, strlen(s));
                }
            }

            if (dataset == 255)
              {
                unsigned char
                  nlen = 0;

                int
                  i;

                if (savedolen > 0)
                  {
                    long diff = outputlen - savedolen;
                    currentpos = TellBlob(ofile);
                    SeekBlob(ofile,savedpos,SEEK_SET);
                    WriteBlobMSBLong(ofile,diff);
                    SeekBlob(ofile,currentpos,SEEK_SET);
                    savedolen = 0L;
                  }
                if (outputlen & 1)
                  {
                    WriteBlobByte(ofile,0x00);
                    outputlen++;
                  }
                WriteBlobString(ofile,"8BIM");
                WriteBlobMSBShort(ofile,recnum);
                outputlen += 6;
                if (name)
                  nlen = strlen(name);
                WriteBlobByte(ofile,nlen);
                outputlen++;
                for (i=0; i<nlen; i++)
                  WriteBlobByte(ofile,name[i]);
                outputlen += nlen;
                if ((nlen & 0x01) == 0)
                  {
                    WriteBlobByte(ofile,0x00);
                    outputlen++;
                  }
                if (recnum != IPTC_ID)
                  {
                    WriteBlobMSBLong(ofile, len);
                    outputlen += 4;

                    next=0;
                    outputlen += len;
                    while (len--)
                      WriteBlobByte(ofile,token[next++]);

                    if (outputlen & 1)
                      {
                        WriteBlobByte(ofile,0x00);
                        outputlen++;
                      }
                  }
                else
                  {
                    /* patch in a fake length for now and fix it later */
                    savedpos = TellBlob(ofile);
                    WriteBlobMSBLong(ofile,0xFFFFFFFFUL);
                    outputlen += 4;
                    savedolen = outputlen;
                  }
              }
            else
              {
                if (len <= 0x7FFF)
                  {
                    WriteBlobByte(ofile,0x1c);
                    WriteBlobByte(ofile,dataset);
                    WriteBlobByte(ofile,recnum & 255);
                    WriteBlobMSBShort(ofile,len);
                    outputlen += 5;
                    next=0;
                    outputlen += len;
                    while (len--)
                      WriteBlobByte(ofile,token[next++]);
                  }
              }
          }
      state++;
    }
    token=(char *) RelinquishMagickMemory(token);
    newstr=(char *) RelinquishMagickMemory(newstr);
    name=(char *) RelinquishMagickMemory(name);
  }
  line=(char *) RelinquishMagickMemory(line);
  if (savedolen > 0)
    {
      long diff = outputlen - savedolen;

      currentpos = TellBlob(ofile);
      SeekBlob(ofile,savedpos,SEEK_SET);
      WriteBlobMSBLong(ofile,diff);
      SeekBlob(ofile,currentpos,SEEK_SET);
      savedolen = 0L;
    }
  return outputlen;
}

/* some defines for the different JPEG block types */
#define M_SOF0  0xC0            /* Start Of Frame N */
#define M_SOF1  0xC1            /* N indicates which compression process */
#define M_SOF2  0xC2            /* Only SOF0-SOF2 are now in common use */
#define M_SOF3  0xC3
#define M_SOF5  0xC5            /* NB: codes C4 and CC are NOT SOF markers */
#define M_SOF6  0xC6
#define M_SOF7  0xC7
#define M_SOF9  0xC9
#define M_SOF10 0xCA
#define M_SOF11 0xCB
#define M_SOF13 0xCD
#define M_SOF14 0xCE
#define M_SOF15 0xCF
#define M_SOI   0xD8
#define M_EOI   0xD9            /* End Of Image (end of datastream) */
#define M_SOS   0xDA            /* Start Of Scan (begins compressed data) */
#define M_APP0  0xe0
#define M_APP1  0xe1
#define M_APP2  0xe2
#define M_APP3  0xe3
#define M_APP4  0xe4
#define M_APP5  0xe5
#define M_APP6  0xe6
#define M_APP7  0xe7
#define M_APP8  0xe8
#define M_APP9  0xe9
#define M_APP10 0xea
#define M_APP11 0xeb
#define M_APP12 0xec
#define M_APP13 0xed
#define M_APP14 0xee
#define M_APP15 0xef

static int jpeg_transfer_1(Image *ifile, Image *ofile)
{
  int c;

  c = ReadBlobByte(ifile);
  if (c == EOF)
    return EOF;
  WriteBlobByte(ofile,c);
  return c;
}

#if defined(future)
static int jpeg_skip_1(Image *ifile)
{
  int c;

  c = ReadBlobByte(ifile);
  if (c == EOF)
    return EOF;
  return c;
}
#endif

static int jpeg_read_remaining(Image *ifile, Image *ofile)
{
   int c;

  while ((c = jpeg_transfer_1(ifile, ofile)) != EOF)
    continue;
  return M_EOI;
}

static int jpeg_skip_variable(Image *ifile, Image *ofile)
{
  unsigned int  length;
  int c1,c2;

  if ((c1 = jpeg_transfer_1(ifile, ofile)) == EOF)
    return M_EOI;
  if ((c2 = jpeg_transfer_1(ifile, ofile)) == EOF)
    return M_EOI;

  length = (((unsigned char) c1) << 8) + ((unsigned char) c2);
  length -= 2;

  while (length--)
    if (jpeg_transfer_1(ifile, ofile) == EOF)
      return M_EOI;

  return 0;
}

static int jpeg_skip_variable2(Image *ifile, Image *ofile)
{
  unsigned int  length;
  int c1,c2;

  if ((c1 = ReadBlobByte(ifile)) == EOF) return M_EOI;
  if ((c2 = ReadBlobByte(ifile)) == EOF) return M_EOI;

  length = (((unsigned char) c1) << 8) + ((unsigned char) c2);
  length -= 2;

  while (length--)
    if (ReadBlobByte(ifile) == EOF)
      return M_EOI;

  return 0;
}

static int jpeg_nextmarker(Image *ifile, Image *ofile)
{
  int c;

  /* transfer anything until we hit 0xff */
  do
  {
    c = ReadBlobByte(ifile);
    if (c == EOF)
      return M_EOI; /* we hit EOF */
    else
      if (c != 0xff)
        WriteBlobByte(ofile,c);
  } while (c != 0xff);

  /* get marker byte, swallowing possible padding */
  do
  {
    c = ReadBlobByte(ifile);
    if (c == EOF)
      return M_EOI; /* we hit EOF */
  } while (c == 0xff);

  return c;
}

#if defined(future)
static int jpeg_skip_till_marker(Image *ifile, int marker)
{
  int c, i;

  do
  {
    /* skip anything until we hit 0xff */
    i = 0;
    do
    {
      c = ReadBlobByte(ifile);
      i++;
      if (c == EOF)
        return M_EOI; /* we hit EOF */
    } while (c != 0xff);

    /* get marker byte, swallowing possible padding */
    do
    {
      c = ReadBlobByte(ifile);
      if (c == EOF)
        return M_EOI; /* we hit EOF */
    } while (c == 0xff);
  } while (c != marker);
  return c;
}
#endif

static char psheader[] = "\xFF\xED\0\0Photoshop 3.0\08BIM\x04\x04\0\0\0\0";

/* Embed binary IPTC data into a JPEG image. */
static int jpeg_embed(Image *ifile, Image *ofile, Image *iptc)
{
  unsigned int marker;
  unsigned int done = 0;
  unsigned int len;
  int inx;

  if (jpeg_transfer_1(ifile, ofile) != 0xFF)
    return 0;
  if (jpeg_transfer_1(ifile, ofile) != M_SOI)
    return 0;

  while (done == MagickFalse)
  {
    marker = jpeg_nextmarker(ifile, ofile);
    if (marker == M_EOI)
      { /* EOF */
        break;
      }
    else
      {
        if (marker != M_APP13)
          {
            WriteBlobByte(ofile,0xff);
            WriteBlobByte(ofile,marker);
          }
      }

    switch (marker)
    {
      case M_APP13:
        /* we are going to write a new APP13 marker, so don't output the old one */
        jpeg_skip_variable2(ifile, ofile);
        break;

      case M_APP0:
        /* APP0 is in each and every JPEG, so when we hit APP0 we insert our new APP13! */
        jpeg_skip_variable(ifile, ofile);

        if (iptc != (Image *)NULL)
          {
            len=GetBlobSize(iptc);
            if (len & 1)
              len++; /* make the length even */
            psheader[ 2 ] = (len+16)>>8;
            psheader[ 3 ] = (len+16)&0xff;
            for (inx = 0; inx < 18; inx++)
              WriteBlobByte(ofile,psheader[inx]);
            jpeg_read_remaining(iptc, ofile);
            len=GetBlobSize(iptc);
            if (len & 1)
              WriteBlobByte(ofile,0);
          }
        break;

      case M_SOS:
        /* we hit data, no more marker-inserting can be done! */
        jpeg_read_remaining(ifile, ofile);
        done = 1;
        break;

      default:
        jpeg_skip_variable(ifile, ofile);
        break;
    }
  }
  return 1;
}

/* handle stripping the APP13 data out of a JPEG */
#if defined(future)
static void jpeg_strip(Image *ifile, Image *ofile)
{
  unsigned int marker;

  marker = jpeg_skip_till_marker(ifile, M_SOI);
  if (marker == M_SOI)
  {
    WriteBlobByte(ofile,0xff);
    WriteBlobByte(ofile,M_SOI);
    jpeg_read_remaining(ifile, ofile);
  }
}

/* Extract any APP13 binary data into a file. */
static int jpeg_extract(Image *ifile, Image *ofile)
{
  unsigned int marker;
  unsigned int done = 0;

  if (jpeg_skip_1(ifile) != 0xff)
    return 0;
  if (jpeg_skip_1(ifile) != M_SOI)
    return 0;

  while (done == MagickFalse)
  {
    marker = jpeg_skip_till_marker(ifile, M_APP13);
    if (marker == M_APP13)
      {
        marker = jpeg_nextmarker(ifile, ofile);
        break;
      }
  }
  return 1;
}
#endif

static Image *ReadMETAImage(const ImageInfo *image_info,
  ExceptionInfo *exception)
{
  Image
    *buff,
    *image;

  int
    c;

  MagickBooleanType
    status;

  size_t
    length;

  StringInfo
    *profile;

  void
    *blob;

  /*
    Open file containing binary metadata
  */
  assert(image_info != (const ImageInfo *) NULL);
  assert(image_info->signature == MagickSignature);
  if (image_info->debug != MagickFalse)
    (void) LogMagickEvent(TraceEvent,GetMagickModule(),image_info->filename);
  assert(exception != (ExceptionInfo *) NULL);
  assert(exception->signature == MagickSignature);
  image=AllocateImage(image_info);
  status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
  if (status == MagickFalse)
    {
      DestroyImageList(image);
      return((Image *) NULL);
    }
  image->columns=1;
  image->rows=1;
  SetImage(image,OpaqueOpacity);
  length=1;
  if (LocaleNCompare(image_info->magick,"8BIM",4) == 0)
    {
      /*
        Read 8BIM binary metadata.
      */
      buff=AllocateImage((ImageInfo *) NULL);
      if (buff == (Image *) NULL)
        ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
      blob=(unsigned char *) AcquireMagickMemory(length);
      if (blob == (unsigned char *) NULL)
        {
          buff=DestroyImage(buff);
          ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
        }
      AttachBlob(buff->blob,blob,length);
      if (LocaleCompare(image_info->magick,"8BIMTEXT") == 0)
        {
          length=parse8BIM(image, buff);
          if (length & 1)
            WriteBlobByte(buff,0x0);
        }
      else if (LocaleCompare(image_info->magick,"8BIMWTEXT") == 0)
        {
          length=parse8BIMW(image, buff);
          if (length & 1)
            WriteBlobByte(buff,0x0);
        }
      else
        {
          for ( ; ; )
          {
            c=ReadBlobByte(image);
            if (c == EOF)
              break;
            WriteBlobByte(buff,c);
          }
        }
      profile=AcquireStringInfo(GetBlobSize(buff));
      SetStringInfoDatum(profile,GetBlobStreamData(buff));
      status=SetImageProfile(image,"iptc",profile);
      profile=DestroyStringInfo(profile);
      if (status == MagickFalse)
        ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
      blob=DetachBlob(buff->blob);
      blob=(unsigned char *) RelinquishMagickMemory(blob);
      buff=DestroyImage(buff);
    }
  if (LocaleNCompare(image_info->magick,"APP1",4) == 0)
    {
      char
        name[MaxTextExtent];

      (void) FormatMagickString(name,MaxTextExtent,"APP%d",1);
      buff=AllocateImage((ImageInfo *) NULL);
      if (buff == (Image *) NULL)
        ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
      blob=(unsigned char *) AcquireMagickMemory(length);
      if (blob == (unsigned char *) NULL)
        {
          buff=DestroyImage(buff);
          ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
        }
      AttachBlob(buff->blob,blob,length);
      if (LocaleCompare(image_info->magick,"APP1JPEG") == 0)
        {
          Image
            *iptc;

          int
            result;

          profile=(StringInfo *) image_info->client_data;
          if ((profile == (StringInfo *) NULL) ||
              (profile->datum == (unsigned char *) NULL) ||
              (profile->length == 0))
            {
              blob=DetachBlob(buff->blob);
              blob=(char *) RelinquishMagickMemory(blob);
              buff=DestroyImage(buff);
              ThrowReaderException(CoderError,"NoIPTCProfileAvailable");
            }
          iptc=AllocateImage((ImageInfo *) NULL);
          if (iptc == (Image *) NULL)
            {
              blob=DetachBlob(buff->blob);
              blob=(char *) RelinquishMagickMemory(blob);
              buff=DestroyImage(buff);
              ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
            }
          AttachBlob(iptc->blob,profile->datum,profile->length);
          result=jpeg_embed(image,buff,iptc);
          blob=DetachBlob(iptc->blob);
          blob=(char *) RelinquishMagickMemory(blob);
          iptc=DestroyImage(iptc);
          if (result == 0)
            {
              blob=DetachBlob(buff->blob);
              blob=(char *) RelinquishMagickMemory(blob);
              buff=DestroyImage(buff);
              ThrowReaderException(CoderError,"JPEGEmbeddingFailed");
            }
        }
      else
        {
#ifdef SLOW_METHOD
          for ( ; ; )
          {
            /* Really - really slow - FIX ME PLEASE!!!! */
            c=ReadBlobByte(image);
            if (c == EOF)
              break;
            WriteBlobByte(buff,c);
          }
#else
#define MaxBufferSize  65541
          long
            i;

          unsigned char
            *buffer;

          size_t
            length;

          ssize_t
            count;

          buffer=(unsigned char *) AcquireMagickMemory(MaxBufferSize);
          if (buffer != (unsigned char *) NULL)
            {
              i=0;
              while ((length=ReadBlob(image,MaxBufferSize,buffer)) != 0)
              {
                count=0;
                for (i=0; i < (long) length; i+=count)
                {
                  count=WriteBlob(buff,length-i,buffer+i);
                  if (count <= 0)
                    break;
                }
                if (i < (long) length)
                  break;
              }
              buffer=(unsigned char *) RelinquishMagickMemory(buffer);
            }
#endif
        }
      profile=AcquireStringInfo(GetBlobSize(buff));
      SetStringInfoDatum(profile,GetBlobStreamData(buff));
      status=SetImageProfile(image,name,profile);
      profile=DestroyStringInfo(profile);
      if (status == MagickFalse)
        ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
      blob=DetachBlob(buff->blob);
      blob=(char *) RelinquishMagickMemory(blob);
      buff=DestroyImage(buff);
    }
  if ((LocaleCompare(image_info->magick,"ICC") == 0) ||
      (LocaleCompare(image_info->magick,"ICM") == 0))
    {
      buff=AllocateImage((ImageInfo *) NULL);
      if (buff == (Image *) NULL)
        ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
      blob=(unsigned char *) AcquireMagickMemory(length);
      if (blob == (unsigned char *) NULL)
        {
          buff=DestroyImage(buff);
          ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
        }
      AttachBlob(buff->blob,blob,length);
      for ( ; ; )
      {
        c=ReadBlobByte(image);
        if (c == EOF)
          break;
        WriteBlobByte(buff,c);
      }
      profile=AcquireStringInfo(GetBlobSize(buff));
      SetStringInfoDatum(profile,GetBlobStreamData(buff));
      (void) SetImageProfile(image,"icc",profile);
      profile=DestroyStringInfo(profile);
      blob=DetachBlob(buff->blob);
      blob=(unsigned char *) RelinquishMagickMemory(blob);
      buff=DestroyImage(buff);
    }
  if (LocaleCompare(image_info->magick,"IPTC") == 0)
    {
      buff=AllocateImage((ImageInfo *) NULL);
      if (buff == (Image *) NULL)
        ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
      blob=(unsigned char *) AcquireMagickMemory(length);
      if (blob == (unsigned char *) NULL)
        {
          buff=DestroyImage(buff);
          ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
        }
      AttachBlob(buff->blob,blob,length);
      /* write out the header - length field patched below */
      WriteBlob(buff,12,(unsigned char *) "8BIM\04\04\0\0\0\0\0\0");
      if (LocaleCompare(image_info->magick,"IPTCTEXT") == 0)
        {
          length=parse8BIM(image, buff);
          if (length & 1)
            WriteBlobByte(buff,0x0);
        }
      else if (LocaleCompare(image_info->magick,"IPTCWTEXT") == 0)
        {
        }
      else
        {
          for ( ; ; )
          {
            c=ReadBlobByte(image);
            if (c == EOF)
              break;
            WriteBlobByte(buff,c);
          }
        }
      profile=AcquireStringInfo(GetBlobSize(buff));
      /*
        subtract off the length of the 8BIM stuff.
      */
      length=profile->length-12;
      profile->datum[10]=length >> 8;
      profile->datum[11]=length & 0xff;
      SetStringInfoDatum(profile,GetBlobStreamData(buff));
      (void) SetImageProfile(image,"iptc",profile);
      profile=DestroyStringInfo(profile);
      blob=DetachBlob(buff->blob);
      blob=(unsigned char *) RelinquishMagickMemory(blob);
      buff=DestroyImage(buff);
    }
  CloseBlob(image);
  return(GetFirstImageInList(image));
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   R e g i s t e r M E T A I m a g e                                         %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  RegisterMETAImage() adds attributes for the META image format to
%  the list of supported formats.  The attributes include the image format
%  tag, a method to read and/or write the format, whether the format
%  supports the saving of more than one frame to the same file or blob,
%  whether the format supports native in-memory I/O, and a brief
%  description of the format.
%
%  The format of the RegisterMETAImage method is:
%
%      RegisterMETAImage(void)
%
*/
ModuleExport void RegisterMETAImage(void)
{
  MagickInfo
    *entry;

  entry=SetMagickInfo("8BIM");
  entry->decoder=(DecoderHandler *) ReadMETAImage;
  entry->encoder=(EncoderHandler *) WriteMETAImage;
  entry->adjoin=MagickFalse;
  entry->stealth=MagickTrue;
  entry->seekable_stream=MagickTrue;
  entry->description=AcquireString("Photoshop resource format");
  entry->module=AcquireString("META");
  (void) RegisterMagickInfo(entry);

  entry=SetMagickInfo("8BIMTEXT");
  entry->decoder=(DecoderHandler *) ReadMETAImage;
  entry->encoder=(EncoderHandler *) WriteMETAImage;
  entry->adjoin=MagickFalse;
  entry->stealth=MagickTrue;
  entry->seekable_stream=MagickTrue;
  entry->description=AcquireString("Photoshop resource text format");
  entry->module=AcquireString("META");
  (void) RegisterMagickInfo(entry);

  entry=SetMagickInfo("8BIMWTEXT");
  entry->decoder=(DecoderHandler *) ReadMETAImage;
  entry->encoder=(EncoderHandler *) WriteMETAImage;
  entry->adjoin=MagickFalse;
  entry->stealth=MagickTrue;
  entry->seekable_stream=MagickTrue;
  entry->description=AcquireString("Photoshop resource wide text format");
  entry->module=AcquireString("META");
  (void) RegisterMagickInfo(entry);

  entry=SetMagickInfo("APP1");
  entry->decoder=(DecoderHandler *) ReadMETAImage;
  entry->encoder=(EncoderHandler *) WriteMETAImage;
  entry->adjoin=MagickFalse;
  entry->stealth=MagickTrue;
  entry->seekable_stream=MagickTrue;
  entry->description=AcquireString("Raw application information");
  entry->module=AcquireString("META");
  (void) RegisterMagickInfo(entry);

  entry=SetMagickInfo("APP1JPEG");
  entry->decoder=(DecoderHandler *) ReadMETAImage;
  entry->encoder=(EncoderHandler *) WriteMETAImage;
  entry->adjoin=MagickFalse;
  entry->stealth=MagickTrue;
  entry->seekable_stream=MagickTrue;
  entry->description=AcquireString("Raw JPEG binary data");
  entry->module=AcquireString("META");
  (void) RegisterMagickInfo(entry);

  entry=SetMagickInfo("EXIF");
  entry->decoder=(DecoderHandler *) ReadMETAImage;
  entry->encoder=(EncoderHandler *) WriteMETAImage;
  entry->adjoin=MagickFalse;
  entry->stealth=MagickTrue;
  entry->seekable_stream=MagickTrue;
  entry->description=AcquireString("Exif digital camera binary data");
  entry->module=AcquireString("META");
  (void) RegisterMagickInfo(entry);

  entry=SetMagickInfo("XMP");
  entry->decoder=(DecoderHandler *) ReadMETAImage;
  entry->encoder=(EncoderHandler *) WriteMETAImage;
  entry->adjoin=MagickFalse;
  entry->stealth=MagickTrue;
  entry->seekable_stream=MagickTrue;
  entry->description=AcquireString("Adobe XML metadata");
  entry->module=AcquireString("META");
  (void) RegisterMagickInfo(entry);

  entry=SetMagickInfo("ICM");
  entry->decoder=(DecoderHandler *) ReadMETAImage;
  entry->encoder=(EncoderHandler *) WriteMETAImage;
  entry->adjoin=MagickFalse;
  entry->stealth=MagickTrue;
  entry->seekable_stream=MagickTrue;
  entry->description=AcquireString("ICC Color Profile");
  entry->module=AcquireString("META");
  (void) RegisterMagickInfo(entry);

  entry=SetMagickInfo("ICC");
  entry->decoder=(DecoderHandler *) ReadMETAImage;
  entry->encoder=(EncoderHandler *) WriteMETAImage;
  entry->adjoin=MagickFalse;
  entry->stealth=MagickTrue;
  entry->seekable_stream=MagickTrue;
  entry->description=AcquireString("ICC Color Profile");
  entry->module=AcquireString("META");
  (void) RegisterMagickInfo(entry);

  entry=SetMagickInfo("IPTC");
  entry->decoder=(DecoderHandler *) ReadMETAImage;
  entry->encoder=(EncoderHandler *) WriteMETAImage;
  entry->adjoin=MagickFalse;
  entry->stealth=MagickTrue;
  entry->seekable_stream=MagickTrue;
  entry->description=AcquireString("IPTC Newsphoto");
  entry->module=AcquireString("META");
  (void) RegisterMagickInfo(entry);

  entry=SetMagickInfo("IPTCTEXT");
  entry->decoder=(DecoderHandler *) ReadMETAImage;
  entry->encoder=(EncoderHandler *) WriteMETAImage;
  entry->adjoin=MagickFalse;
  entry->stealth=MagickTrue;
  entry->seekable_stream=MagickTrue;
  entry->description=AcquireString("IPTC Newsphoto text format");
  entry->module=AcquireString("META");
  (void) RegisterMagickInfo(entry);

  entry=SetMagickInfo("IPTCWTEXT");
  entry->decoder=(DecoderHandler *) ReadMETAImage;
  entry->encoder=(EncoderHandler *) WriteMETAImage;
  entry->adjoin=MagickFalse;
  entry->stealth=MagickTrue;
  entry->seekable_stream=MagickTrue;
  entry->description=AcquireString("IPTC Newsphoto text format");
  entry->module=AcquireString("META");
  (void) RegisterMagickInfo(entry);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   U n r e g i s t e r M E T A I m a g e                                     %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  UnregisterMETAImage() removes format registrations made by the
%  META module from the list of supported formats.
%
%  The format of the UnregisterMETAImage method is:
%
%      UnregisterMETAImage(void)
%
*/
ModuleExport void UnregisterMETAImage(void)
{
  (void) UnregisterMagickInfo("8BIM");
  (void) UnregisterMagickInfo("8BIMTEXT");
  (void) UnregisterMagickInfo("8BIMWTEXT");
  (void) UnregisterMagickInfo("EXIF");
  (void) UnregisterMagickInfo("APP1");
  (void) UnregisterMagickInfo("APP1JPEG");
  (void) UnregisterMagickInfo("ICCTEXT");
  (void) UnregisterMagickInfo("ICM");
  (void) UnregisterMagickInfo("ICC");
  (void) UnregisterMagickInfo("IPTC");
  (void) UnregisterMagickInfo("IPTCTEXT");
  (void) UnregisterMagickInfo("IPTCWTEXT");
  (void) UnregisterMagickInfo("XMP");
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   W r i t e M E T A I m a g e                                               %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  WriteMETAImage() writes a META image to a file.
%
%  The format of the WriteMETAImage method is:
%
%      MagickBooleanType WriteMETAImage(const ImageInfo *image_info,
%        Image *image)
%
%  Compression code contributed by Kyle Shorter.
%
%  A description of each parameter follows:
%
%    o image_info: Specifies a pointer to an ImageInfo structure.
%
%    o image: A pointer to a Image structure.
%
%
*/

static long GetIPTCStream(unsigned char