/*

% Copyright (C) 2003-2025 GraphicsMagick Group

% Copyright (C) 2002 ImageMagick Studio

%

% This program is covered by multiple licenses, which are described in

% Copyright.txt. You should have received a copy of Copyright.txt with this

% package; otherwise see http://www.graphicsmagick.org/www/Copyright.html.

%

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%                                                                             %

%                                                                             %

%                              CCC  U   U  TTTTT                              %

%                             C     U   U    T                                %

%                             C     U   U    T                                %

%                             C     U   U    T                                %

%                              CCC   UUU     T                                %

%                                                                             %

%                                                                             %

%                         Read DR Halo Image Format.                          %

%                                                                             %

%                                                                             %

%                              Software Design                                %

%                              Jaroslav Fojtik                                %

%                              June 2000 - 2007                               %

%                                                                             %

%                                                                             %

%                                                                             %

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%

%

*/

/*

  Include declarations.

*/

#include "magick/studio.h"

#include "magick/analyze.h"

#include "magick/blob.h"

#include "magick/color.h"

#include "magick/colormap.h"

#include "magick/magick.h"

#include "magick/pixel_cache.h"

#include "magick/utility.h"

#include "magick/static.h"

typedef struct

{

  unsigned Width;

  unsigned Height;

  unsigned Reserved;

}CUTHeader;      /*Dr Halo*/

typedef struct

{

  char FileId[2];

  unsigned Version;

  unsigned Size;

  char FileType;

  char SubType;

  unsigned BoardID;

  unsigned GraphicsMode;

  unsigned MaxIndex;

  unsigned MaxRed;

  unsigned MaxGreen;

  unsigned MaxBlue;

  char PaletteId[20];

}CUTPalHeader;

static void InsertRow(unsigned char *p,long y,Image *image)

{

  int bit; long x;

  register PixelPacket *q;

  IndexPacket index;

  register IndexPacket *indexes;

  switch (image->depth)

    {

    case 1:  /* Convert bitmap scanline. */

      {

        q=SetImagePixels(image,0,y,image->columns,1);

        if (q == (PixelPacket *) NULL)

          break;

        indexes=AccessMutableIndexes(image);

        for (x=0; x < ((long) image->columns-7); x+=8)

          {

            for (bit=0; bit < 8; bit++)

              {

                index=((*p) & (0x80U >> bit) ? 0x01U : 0x00U);

                indexes[x+bit]=index;

                *q++=image->colormap[index];

              }

            p++;

          }

        if ((image->columns % 8) != 0)

          {

            for (bit=0; bit < (long) (image->columns % 8); bit++)

              {

                index=((*p) & (0x80 >> bit) ? 0x01U : 0x00U);

                indexes[x+bit]=index;

                *q++=image->colormap[index];

              }

            p++;

          }

        if (!SyncImagePixels(image))

          break;

        /*            if (image->previous == (Image *) NULL)

                      if (QuantumTick(y,image->rows))

                      ProgressMonitor(LoadImageText,image->rows-y-1,image->rows);*/

        break;

      }

    case 2:  /* Convert PseudoColor scanline. */

      {

        q=SetImagePixels(image,0,y,image->columns,1);

        if (q == (PixelPacket *) NULL)

          break;

        indexes=AccessMutableIndexes(image);

        for (x=0; x < ((long) image->columns-1); x+=2)

          {

            index=(IndexPacket) ((*p >> 6U) & 0x3U);

            VerifyColormapIndex(image,index);

            indexes[x]=index;

            *q++=image->colormap[index];

            index=(IndexPacket) ((*p >> 4U) & 0x3U);

            VerifyColormapIndex(image,index);

            indexes[x]=index;

            *q++=image->colormap[index];

            index=(IndexPacket) ((*p >> 2U) & 0x3U);

            VerifyColormapIndex(image,index);

            indexes[x]=index;

            *q++=image->colormap[index];

            index=(IndexPacket) ((*p) & 0x3U);

            VerifyColormapIndex(image,index);

            indexes[x+1]=index;

            *q++=image->colormap[index];

            p++;

          }

        if ((image->columns % 4) != 0)

          {

            index=(IndexPacket) ((*p >> 6U) & 0x3U);

            VerifyColormapIndex(image,index);

            indexes[x]=index;

            *q++=image->colormap[index];

            if ((image->columns % 4) >= 1)

              {

                index=(IndexPacket) ((*p >> 4U) & 0x3U);

                VerifyColormapIndex(image,index);

                indexes[x]=index;

                *q++=image->colormap[index];

                if ((image->columns % 4) >= 2U)

                  {

                    index=(IndexPacket) ((*p >> 2U) & 0x3U);

                    VerifyColormapIndex(image,index);

                    indexes[x]=index;

                    *q++=image->colormap[index];

                  }

              }

            p++;

          }

        if (!SyncImagePixels(image))

          break;

        /*         if (image->previous == (Image *) NULL)

                   if (QuantumTick(y,image->rows))

                   ProgressMonitor(LoadImageText,image->rows-y-1,image->rows);*/

        break;

      }

    case 4:  /* Convert PseudoColor scanline. */

      {

        q=SetImagePixels(image,0,y,image->columns,1);

        if (q == (PixelPacket *) NULL)

          break;

        indexes=AccessMutableIndexes(image);

        for (x=0; x < ((long) image->columns-1); x+=2)

          {

            index=(IndexPacket) ((*p >> 4U) & 0xfU);

            VerifyColormapIndex(image,index);

            indexes[x]=index;

            *q++=image->colormap[index];

            index=(IndexPacket) ((*p) & 0xfU);

            VerifyColormapIndex(image,index);

            indexes[x+1]=index;

            *q++=image->colormap[index];

            p++;

          }

        if ((image->columns % 2) != 0)

          {

            index=(IndexPacket) ((*p >> 4U) & 0xfU);

            VerifyColormapIndex(image,index);

            indexes[x]=index;

            *q++=image->colormap[index];

            p++;

          }

        if (!SyncImagePixels(image))

          break;

        /*         if (image->previous == (Image *) NULL)

                   if (QuantumTick(y,image->rows))

                   ProgressMonitor(LoadImageText,image->rows-y-1,image->rows);*/

        break;

      }

    case 8: /* Convert PseudoColor scanline. */

      {

        q=SetImagePixels(image,0,y,image->columns,1);

        if (q == (PixelPacket *) NULL) break;

        indexes=AccessMutableIndexes(image);

        for (x=0; x < (long) image->columns; x++)

          {

            index=(IndexPacket) (*p);

            VerifyColormapIndex(image,index);

            indexes[x]=index;

            *q++=image->colormap[index];

            p++;

          }

        if (!SyncImagePixels(image))

          break;

        /*           if (image->previous == (Image *) NULL)

                     if (QuantumTick(y,image->rows))

                     ProgressMonitor(LoadImageText,image->rows-y-1,image->rows);*/

      }

      break;

    }

}

static unsigned int GetCutColors(Image *image)

{

  unsigned long

    x,

    y;

  PixelPacket

    *q;

  Quantum

    MaxColor,

    ScaleCharToQuantum16;

  /* Compute the number of colors in Grayed R[i]=G[i]=B[i] image */

  ScaleCharToQuantum16=ScaleCharToQuantum(16U);

  MaxColor=0U;

  for (y=0; y < image->rows; y++)

    {

      q=SetImagePixels(image,0,y,image->columns,1);

      if (q == (PixelPacket *) NULL)

          break;

      for (x=image->columns; x != 0; x--)

        {

          if (MaxColor < q->red)

            MaxColor=q->red;

          if (MaxColor >= ScaleCharToQuantum16)

            return(255U);

          q++;

        }

    }

  if (MaxColor < ScaleCharToQuantum(2))

    MaxColor=2U;

  else if (MaxColor < ScaleCharToQuantum(16U))

    MaxColor=16U;

  return (MaxColor);

}

/*

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%                                                                             %

%                                                                             %

%                                                                             %

%   R e a d C U T I m a g e                                                   %

%                                                                             %

%                                                                             %

%                                                                             %

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%

%  Method ReadCUTImage reads an CUT X 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 ReadCUTImage method is:

%

%      Image *ReadCUTImage(const ImageInfo *image_info,ExceptionInfo *exception)

%

%  A description of each parameter follows:

%

%    o image:  Method ReadCUTImage 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 a ImageInfo structure.

%

%    o exception: return any errors or warnings in this structure.

%

%

*/

#define ThrowCUTReaderException(code_,reason_,image_) \

{ \

  if (palette != (Image *) NULL)              \

    DestroyImage(palette);                    \

  if (clone_info != (ImageInfo *) NULL)       \

    DestroyImageInfo(clone_info);             \

  ThrowReaderException(code_,reason_,image_); \

}

static Image *ReadCUTImage(const ImageInfo *image_info,ExceptionInfo *exception)

{

  Image *image,*palette = (Image *) NULL;

  ImageInfo *clone_info = (ImageInfo *) NULL;

  unsigned int status;

  unsigned long EncodedByte;

  unsigned char RunCount,RunValue,RunCountMasked;

  CUTHeader  Header;

  CUTPalHeader PalHeader;

  long i,j;

  long ldblk;

  unsigned char *BImgBuff=NULL,*ptrB;

  PixelPacket *q;

  /*

    Open image file.

  */

  assert(image_info != (const ImageInfo *) NULL);

  assert(image_info->signature == MagickSignature);

  assert(exception != (ExceptionInfo *) NULL);

  assert(exception->signature == MagickSignature);

  image=AllocateImage(image_info);

  status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);

  if (status == False)

    ThrowReaderException(FileOpenError,UnableToOpenFile,image);

  /*

    Read CUT image.

  */

  Header.Width=ReadBlobLSBShort(image);

  Header.Height=ReadBlobLSBShort(image);

  Header.Reserved=ReadBlobLSBShort(image);

  if (Header.Width==0 || Header.Height==0 || Header.Reserved!=0 ||

      (Header.Width > INT_MAX) || (Header.Height > INT_MAX) )

  CUT_KO:  ThrowCUTReaderException(CorruptImageError,ImproperImageHeader,image);

  /*---This code checks first line of image---*/

  EncodedByte=ReadBlobLSBShort(image);

  RunCount=ReadBlobByte(image);

  RunCountMasked=RunCount & 0x7F;

  ldblk=0;

  while (RunCountMasked != 0)  /*end of line?*/

    {

      i=1;

      if (RunCount<0x80) i=RunCountMasked;

      (void) SeekBlob(image,TellBlob(image)+i,SEEK_SET);

      if (EOFBlob(image)) goto CUT_KO;  /*wrong data*/

      EncodedByte-=i+1;

      ldblk+=RunCountMasked;

      RunCount=ReadBlobByte(image);

      if (EOFBlob(image))  goto CUT_KO;  /*wrong data: unexpected eof in line*/

      RunCountMasked=RunCount & 0x7F;

    }

  if (EncodedByte!=1) goto CUT_KO;  /*wrong data: size incorrect*/

  i=0;        /*guess a number of bit planes*/

  if (ldblk==(int) Header.Width)   i=8;

  if (2*ldblk==(int) Header.Width) i=4;

  if (8*ldblk==(int) Header.Width) i=1;

  if (i==0) goto CUT_KO;    /*wrong data: incorrect bit planes*/

  image->columns=Header.Width;

  image->rows=Header.Height;

  image->depth=i;

  image->colors=1l >> i;

  /* If ping is true, then only set image size and colors without reading any image data. */

  if (image_info->ping) goto Finish;

  if (CheckImagePixelLimits(image, exception) != MagickPass)

    ThrowCUTReaderException(ResourceLimitError,ImagePixelLimitExceeded,image);

  /* ----- Do something with palette ----- */

  if ((clone_info=CloneImageInfo(image_info)) == NULL) goto NoPalette;

  i=(long) strlen(clone_info->filename);

  j=i;

  while (--i>0)

    {

      if (clone_info->filename[i]=='.')

        {

          break;

        }

      if (clone_info->filename[i]=='/' || clone_info->filename[i]=='\\' ||

          clone_info->filename[i]==':' )

        {

          i=j;

          break;

        }

    }

  if (i <= 0)

    goto NoPalette;

  (void) strlcpy(clone_info->filename+i,".PAL",sizeof(clone_info->filename)-i);

  if ((clone_info->file=fopen(clone_info->filename,"rb"))==NULL)

    {

      (void) strlcpy(clone_info->filename+i,".pal",sizeof(clone_info->filename)-i);

      if ((clone_info->file=fopen(clone_info->filename,"rb"))==NULL)

        {

          clone_info->filename[i]=0;

          if ((clone_info->file=fopen(clone_info->filename,"rb"))==NULL)

            {

              DestroyImageInfo(clone_info);

              clone_info=NULL;

              goto NoPalette;

            }

        }

    }

  if ( (palette=AllocateImage(clone_info))==NULL ) goto NoPalette;

  status=OpenBlob(clone_info,palette,ReadBinaryBlobMode,exception);

  if (status == False)

    {

    ErasePalette:

      DestroyImage(palette);

      palette=NULL;

      goto NoPalette;

    }

  if (palette!=NULL)

    {

      (void) ReadBlob(palette,2,PalHeader.FileId);

      if (strncmp(PalHeader.FileId,"AH",2)) goto ErasePalette;

      PalHeader.Version=ReadBlobLSBShort(palette);

      PalHeader.Size=ReadBlobLSBShort(palette);

      PalHeader.FileType=ReadBlobByte(palette);

      PalHeader.SubType=ReadBlobByte(palette);

      PalHeader.BoardID=ReadBlobLSBShort(palette);

      PalHeader.GraphicsMode=ReadBlobLSBShort(palette);

      PalHeader.MaxIndex=ReadBlobLSBShort(palette);

      PalHeader.MaxRed=ReadBlobLSBShort(palette);

      PalHeader.MaxGreen=ReadBlobLSBShort(palette);

      PalHeader.MaxBlue=ReadBlobLSBShort(palette);

      (void) ReadBlob(palette,20,PalHeader.PaletteId);

      if (EOFBlob(image))

        ThrowCUTReaderException(CorruptImageError,UnexpectedEndOfFile,image);

      if (PalHeader.MaxIndex<1) goto ErasePalette;

      image->colors=PalHeader.MaxIndex+1;

      if (!AllocateImageColormap(image,image->colors)) goto NoMemory;

      if (PalHeader.MaxRed==0) PalHeader.MaxRed=MaxRGB;  /*avoid division by 0*/

      if (PalHeader.MaxGreen==0) PalHeader.MaxGreen=MaxRGB;

      if (PalHeader.MaxBlue==0) PalHeader.MaxBlue=MaxRGB;

      for (i=0;i<=(int) PalHeader.MaxIndex;i++)

        {

          /*this may be wrong- I don't know why is palette such strange*/

          j=(long) TellBlob(palette);

          if ((j % 512)>512-6)

            {

              j=((j / 512)+1)*512;

              (void) SeekBlob(palette,j,SEEK_SET);

            }

          image->colormap[i].red=ReadBlobLSBShort(palette);

          if (MaxRGB!=PalHeader.MaxRed)

            {

              image->colormap[i].red=(Quantum)

                (((double)image->colormap[i].red*MaxRGB+(PalHeader.MaxRed>>1))/PalHeader.MaxRed+0.5);

            }

          image->colormap[i].green=ReadBlobLSBShort(palette);

          if (MaxRGB!=PalHeader.MaxGreen)

            {

              image->colormap[i].green=(Quantum)

                (((double)image->colormap[i].green*MaxRGB+(PalHeader.MaxGreen>>1))/PalHeader.MaxGreen+0.5);

            }

          image->colormap[i].blue=ReadBlobLSBShort(palette);

          if (MaxRGB!=PalHeader.MaxBlue)

            {

              image->colormap[i].blue=(Quantum)

                (((double)image->colormap[i].blue*MaxRGB+(PalHeader.MaxBlue>>1))/PalHeader.MaxBlue+0.5);

            }

        }

      if (EOFBlob(image))

        ThrowCUTReaderException(CorruptImageError,UnexpectedEndOfFile,image);

    }

 NoPalette:

  if (palette==NULL)

    {

      image->colors=256;

      if (!AllocateImageColormap(image,image->colors))

        {

        NoMemory:

          if (clone_info != NULL)

            {

              DestroyImageInfo(clone_info);

              clone_info=(ImageInfo *) NULL;

            }

          ThrowCUTReaderException(ResourceLimitError,MemoryAllocationFailed,image);

        }

      for (i=0; i < (long)image->colors; i++)

        {

          image->colormap[i].red=ScaleCharToQuantum(i);

          image->colormap[i].green=ScaleCharToQuantum(i);

          image->colormap[i].blue=ScaleCharToQuantum(i);

        }

    }

  /* ----- Load RLE compressed raster ----- */

  BImgBuff=MagickAllocateResourceLimitedMemory(unsigned char *,(size_t) (ldblk));  /*Ldblk was set in the check phase*/

  if (BImgBuff==NULL) goto NoMemory;

  (void) SeekBlob(image,6 /*sizeof(Header)*/,SEEK_SET);

  for (i=0;i<(int) Header.Height;i++)

    {

      EncodedByte=ReadBlobLSBShort(image);

      ptrB=BImgBuff;

      j=ldblk;

      RunCount=ReadBlobByte(image);

      RunCountMasked=RunCount & 0x7F;

      while (RunCountMasked!=0)

        {

          if (RunCountMasked>j)

            {    /*Wrong Data*/

              RunCountMasked=(unsigned char) j;

              if (j==0)

                {

                  break;

                }

            }

          if (RunCount>0x80)

            {

              RunValue=ReadBlobByte(image);

              (void) memset(ptrB,RunValue,RunCountMasked);

            }

          else {

            (void) ReadBlob(image,RunCountMasked,ptrB);

          }

          ptrB+=RunCountMasked;

          j-=RunCountMasked;

          if (EOFBlob(image)) goto Finish;  /* wrong data: unexpected eof in line */

          RunCount=ReadBlobByte(image);

          RunCountMasked=RunCount & 0x7F;

        }

      InsertRow(BImgBuff,i,image);

    }

  /*detect monochrome image*/

  if (palette==NULL)

    {    /*attempt to detect binary (black&white) images*/

      if ((image->storage_class == PseudoClass) && IsGrayImage(image,&image->exception))

        {

          if (GetCutColors(image)==2)

            {

              for (i=0; i < (long)image->colors; i++)

                {

                  register Quantum

                    sample;

                  sample=ScaleCharToQuantum(i);

                  if (image->colormap[i].red!=sample) goto Finish;

                  if (image->colormap[i].green!=sample) goto Finish;

                  if (image->colormap[i].blue!=sample) goto Finish;

                }

              image->colormap[1].red=image->colormap[1].green=image->colormap[1].blue=MaxRGB;

              for (i=0; i < (long)image->rows; i++)

                {

                  q=SetImagePixels(image,0,i,image->columns,1);

                  if (q == (PixelPacket *) NULL)

                    break;

                  for (j=0; j < (long)image->columns; j++)

                    {

                      if (q->red==ScaleCharToQuantum(1))

                        {

                          q->red=q->green=q->blue=MaxRGB;

                        }

                      q++;

                    }

                  if (!SyncImagePixels(image)) goto Finish;

                }

            }

        }

    }

 Finish:

  if (BImgBuff!=NULL) MagickFreeResourceLimitedMemory(unsigned char *,BImgBuff);

  if (palette!=NULL)

    {

      DestroyImage(palette);

      palette=(Image *) NULL;

    }

  if (clone_info!=NULL)

    {

      DestroyImageInfo(clone_info);

      clone_info=(ImageInfo *) NULL;

    }

  if (EOFBlob(image))

    ThrowCUTReaderException(CorruptImageError,UnexpectedEndOfFile,image);

  CloseBlob(image);

  StopTimer(&image->timer);

  return(image);

}

/*

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%                                                                             %

%                                                                             %

%                                                                             %

%   R e g i s t e r C U T I m a g e                                           %

%                                                                             %

%                                                                             %

%                                                                             %

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%

%  Method RegisterCUTImage adds attributes for the CUT 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 RegisterCUTImage method is:

%

%      RegisterCUTImage(void)

%

*/

ModuleExport void RegisterCUTImage(void)

{

  MagickInfo

    *entry;

  entry=SetMagickInfo("CUT");

  entry->decoder=(DecoderHandler) ReadCUTImage;

  entry->seekable_stream=True;

  entry->description="DR Halo";

  entry->module="CUT";

  (void) RegisterMagickInfo(entry);

}

/*

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%                                                                             %

%                                                                             %

%                                                                             %

%   U n r e g i s t e r C U T I m a g e                                       %

%                                                                             %

%                                                                             %

%                                                                             %

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%

%  Method UnregisterCUTImage removes format registrations made by the

%  CUT module from the list of supported formats.

%

%  The format of the UnregisterCUTImage method is:

%

%      UnregisterCUTImage(void)

%

*/

ModuleExport void UnregisterCUTImage(void)

{

  (void) UnregisterMagickInfo("CUT");

}