/*

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

%                                                                             %

%                                                                             %

%                                                                             %

%                        V   V  IIIII  FFFFF  FFFFF                           %

%                        V   V    I    F      F                               %

%                        V   V    I    FFF    FFF                             %

%                         V V     I    F      F                               %

%                          V    IIIII  F      F                               %

%                                                                             %

%                                                                             %

%                Read/Write Khoros Visualization Image Format                 %

%                                                                             %

%                              Software Design                                %

%                                   Cristy                                    %

%                                 July 1992                                   %

%                                                                             %

%                                                                             %

%  Copyright @ 1999 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                                            %

%                                                                             %

%    https://imagemagick.org/script/license.php                               %

%                                                                             %

%  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 "MagickCore/studio.h"

#include "MagickCore/attribute.h"

#include "MagickCore/blob.h"

#include "MagickCore/blob-private.h"

#include "MagickCore/cache.h"

#include "MagickCore/color.h"

#include "MagickCore/color-private.h"

#include "MagickCore/colormap.h"

#include "MagickCore/colormap-private.h"

#include "MagickCore/colorspace.h"

#include "MagickCore/colorspace-private.h"

#include "MagickCore/exception.h"

#include "MagickCore/exception-private.h"

#include "MagickCore/image.h"

#include "MagickCore/image-private.h"

#include "MagickCore/list.h"

#include "MagickCore/magick.h"

#include "MagickCore/memory_.h"

#include "MagickCore/module.h"

#include "MagickCore/monitor.h"

#include "MagickCore/monitor-private.h"

#include "MagickCore/pixel-accessor.h"

#include "MagickCore/property.h"

#include "MagickCore/quantum-private.h"

#include "MagickCore/static.h"

#include "MagickCore/string_.h"

#include "coders/coders-private.h"

/*

  Forward declarations.

*/

static MagickBooleanType

  WriteVIFFImage(const ImageInfo *,Image *,ExceptionInfo *);

/*

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

%                                                                             %

%                                                                             %

%                                                                             %

%   I s V I F F                                                               %

%                                                                             %

%                                                                             %

%                                                                             %

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

%

%  IsVIFF() returns MagickTrue if the image format type, identified by the

%  magick string, is VIFF.

%

%  The format of the IsVIFF method is:

%

%      MagickBooleanType IsVIFF(const unsigned char *magick,const size_t length)

%

%  A description of each parameter follows:

%

%    o magick: compare image format pattern against these bytes.

%

%    o length: Specifies the length of the magick string.

%

*/

static MagickBooleanType IsVIFF(const unsigned char *magick,const size_t length)

{

  if (length < 2)

    return(MagickFalse);

  if (memcmp(magick,"\253\001",2) == 0)

    return(MagickTrue);

  return(MagickFalse);

}

/*

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

%                                                                             %

%                                                                             %

%                                                                             %

%   R e a d V I F F I m a g e                                                 %

%                                                                             %

%                                                                             %

%                                                                             %

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

%

%  ReadVIFFImage() reads a Khoros Visualization 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 ReadVIFFImage method is:

%

%      Image *ReadVIFFImage(const ImageInfo *image_info,

%        ExceptionInfo *exception)

%

%  A description of each parameter follows:

%

%    o image: Method ReadVIFFImage 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: the image info.

%

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

%

*/

static Image *ReadVIFFImage(const ImageInfo *image_info,

  ExceptionInfo *exception)

{

#define VFF_CM_genericRGB  15

#define VFF_CM_ntscRGB  1

#define VFF_CM_NONE  0

#define VFF_DEP_DECORDER  0x4

#define VFF_DEP_NSORDER  0x8

#define VFF_DES_RAW  0

#define VFF_LOC_IMPLICIT  1

#define VFF_MAPTYP_NONE  0

#define VFF_MAPTYP_1_BYTE  1

#define VFF_MAPTYP_2_BYTE  2

#define VFF_MAPTYP_4_BYTE  4

#define VFF_MAPTYP_FLOAT  5

#define VFF_MAPTYP_DOUBLE  7

#define VFF_MS_NONE  0

#define VFF_MS_ONEPERBAND  1

#define VFF_MS_SHARED  3

#define VFF_TYP_BIT  0

#define VFF_TYP_1_BYTE  1

#define VFF_TYP_2_BYTE  2

#define VFF_TYP_4_BYTE  4

#define VFF_TYP_FLOAT  5

#define VFF_TYP_DOUBLE  9

  typedef struct _ViffInfo

  {

    unsigned char

      identifier,

      file_type,

      release,

      version,

      machine_dependency,

      reserve[3];

    char

      comment[512];

    unsigned int

      rows,

      columns,

      subrows;

    int

      x_offset,

      y_offset;

    float

      x_bits_per_pixel,

      y_bits_per_pixel;

    unsigned int

      location_type,

      location_dimension,

      number_of_images,

      number_data_bands,

      data_storage_type,

      data_encode_scheme,

      map_scheme,

      map_storage_type,

      map_rows,

      map_columns,

      map_subrows,

      map_enable,

      maps_per_cycle,

      color_space_model;

  } ViffInfo;

  double

    min_value,

    scale_factor,

    value;

  Image

    *image;

  int

    bit;

  MagickBooleanType

    status;

  MagickSizeType

    number_pixels;

  Quantum

    *q;

  size_t

    bytes_per_pixel,

    max_packets,

    quantum;

  ssize_t

    count,

    i,

    x,

    y;

  unsigned char

    *p,

    *pixels;

  unsigned long

    lsb_first;

  ViffInfo

    viff_info;

  /*

    Open image file.

  */

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

  assert(image_info->signature == MagickCoreSignature);

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

  assert(exception->signature == MagickCoreSignature);

  if (IsEventLogging() != MagickFalse)

    (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",

      image_info->filename);

  image=AcquireImage(image_info,exception);

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

  if (status == MagickFalse)

    {

      image=DestroyImageList(image);

      return((Image *) NULL);

    }

  /*

    Read VIFF header (1024 bytes).

  */

  count=ReadBlob(image,1,&viff_info.identifier);

  do

  {

    /*

      Verify VIFF identifier.

    */

    if ((count != 1) || ((unsigned char) viff_info.identifier != 0xab))

      ThrowReaderException(CorruptImageError,"NotAVIFFImage");

    /*

      Initialize VIFF image.

    */

    (void) ReadBlob(image,sizeof(viff_info.file_type),&viff_info.file_type);

    (void) ReadBlob(image,sizeof(viff_info.release),&viff_info.release);

    (void) ReadBlob(image,sizeof(viff_info.version),&viff_info.version);

    (void) ReadBlob(image,sizeof(viff_info.machine_dependency),

      &viff_info.machine_dependency);

    (void) ReadBlob(image,sizeof(viff_info.reserve),viff_info.reserve);

    count=ReadBlob(image,512,(unsigned char *) viff_info.comment);

    if (count != 512)

      ThrowReaderException(CorruptImageError,"ImproperImageHeader");

    viff_info.comment[511]='\0';

    if (strlen(viff_info.comment) > 4)

      (void) SetImageProperty(image,"comment",viff_info.comment,exception);

    if ((viff_info.machine_dependency == VFF_DEP_DECORDER) ||

        (viff_info.machine_dependency == VFF_DEP_NSORDER))

      image->endian=LSBEndian;

    else

      image->endian=MSBEndian;

    viff_info.rows=ReadBlobLong(image);

    viff_info.columns=ReadBlobLong(image);

    viff_info.subrows=ReadBlobLong(image);

    viff_info.x_offset=ReadBlobSignedLong(image);

    viff_info.y_offset=ReadBlobSignedLong(image);

    viff_info.x_bits_per_pixel=(float) ReadBlobLong(image);

    viff_info.y_bits_per_pixel=(float) ReadBlobLong(image);

    viff_info.location_type=ReadBlobLong(image);

    viff_info.location_dimension=ReadBlobLong(image);

    viff_info.number_of_images=ReadBlobLong(image);

    viff_info.number_data_bands=ReadBlobLong(image);

    viff_info.data_storage_type=ReadBlobLong(image);

    viff_info.data_encode_scheme=ReadBlobLong(image);

    viff_info.map_scheme=ReadBlobLong(image);

    viff_info.map_storage_type=ReadBlobLong(image);

    viff_info.map_rows=ReadBlobLong(image);

    viff_info.map_columns=ReadBlobLong(image);

    viff_info.map_subrows=ReadBlobLong(image);

    viff_info.map_enable=ReadBlobLong(image);

    viff_info.maps_per_cycle=ReadBlobLong(image);

    viff_info.color_space_model=ReadBlobLong(image);

    for (i=0; i < 420; i++)

      (void) ReadBlobByte(image);

    if (EOFBlob(image) != MagickFalse)

      ThrowReaderException(CorruptImageError,"UnexpectedEndOfFile");

    number_pixels=(MagickSizeType) viff_info.columns*viff_info.rows;

    if (number_pixels > 8*GetBlobSize(image))

      ThrowReaderException(CorruptImageError,"InsufficientImageDataInFile");

    if (number_pixels != (size_t) number_pixels)

      ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");

    if (number_pixels == 0)

      ThrowReaderException(CoderError,"ImageColumnOrRowSizeIsNotSupported");

    image->columns=viff_info.rows;

    image->rows=viff_info.columns;

    image->depth=viff_info.x_bits_per_pixel <= 8 ? 8UL :

      MAGICKCORE_QUANTUM_DEPTH;

    image->alpha_trait=viff_info.number_data_bands == 4 ? BlendPixelTrait :

      UndefinedPixelTrait;

    status=SetImageExtent(image,image->columns,image->rows,exception);

    if (status == MagickFalse)

      return(DestroyImageList(image));

    (void) SetImageBackgroundColor(image,exception);

    /*

      Verify that we can read this VIFF image.

    */

    if ((viff_info.number_data_bands < 1) || (viff_info.number_data_bands > 4))

      ThrowReaderException(CorruptImageError,"ImproperImageHeader");

    if ((viff_info.data_storage_type != VFF_TYP_BIT) &&

        (viff_info.data_storage_type != VFF_TYP_1_BYTE) &&

        (viff_info.data_storage_type != VFF_TYP_2_BYTE) &&

        (viff_info.data_storage_type != VFF_TYP_4_BYTE) &&

        (viff_info.data_storage_type != VFF_TYP_FLOAT) &&

        (viff_info.data_storage_type != VFF_TYP_DOUBLE))

      ThrowReaderException(CoderError,"DataStorageTypeIsNotSupported");

    if (viff_info.data_encode_scheme != VFF_DES_RAW)

      ThrowReaderException(CoderError,"DataEncodingSchemeIsNotSupported");

    if ((viff_info.map_storage_type != VFF_MAPTYP_NONE) &&

        (viff_info.map_storage_type != VFF_MAPTYP_1_BYTE) &&

        (viff_info.map_storage_type != VFF_MAPTYP_2_BYTE) &&

        (viff_info.map_storage_type != VFF_MAPTYP_4_BYTE) &&

        (viff_info.map_storage_type != VFF_MAPTYP_FLOAT) &&

        (viff_info.map_storage_type != VFF_MAPTYP_DOUBLE))

      ThrowReaderException(CoderError,"MapStorageTypeIsNotSupported");

    if ((viff_info.color_space_model != VFF_CM_NONE) &&

        (viff_info.color_space_model != VFF_CM_ntscRGB) &&

        (viff_info.color_space_model != VFF_CM_genericRGB))

      ThrowReaderException(CoderError,"ColorspaceModelIsNotSupported");

    if (viff_info.location_type != VFF_LOC_IMPLICIT)

      ThrowReaderException(CoderError,"LocationTypeIsNotSupported");

    if (viff_info.number_of_images != 1)

      ThrowReaderException(CoderError,"NumberOfImagesIsNotSupported");

    if (viff_info.map_rows == 0)

      viff_info.map_scheme=VFF_MS_NONE;

    switch ((int) viff_info.map_scheme)

    {

      case VFF_MS_NONE:

      {

        if (viff_info.number_data_bands < 3)

          {

            /*

              Create linear color ramp.

            */

            if (viff_info.data_storage_type == VFF_TYP_BIT)

              image->colors=2;

            else

              if (viff_info.data_storage_type == VFF_MAPTYP_1_BYTE)

                image->colors=256UL;

              else

                image->colors=image->depth <= 8 ? 256UL : 65536UL;

            status=AcquireImageColormap(image,image->colors,exception);

            if (status == MagickFalse)

              ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");

          }

        break;

      }

      case VFF_MS_ONEPERBAND:

      case VFF_MS_SHARED:

      {

        unsigned char

          *viff_colormap;

        /*

          Allocate VIFF colormap.

        */

        switch ((int) viff_info.map_storage_type)

        {

          case VFF_MAPTYP_1_BYTE: bytes_per_pixel=1; break;

          case VFF_MAPTYP_2_BYTE: bytes_per_pixel=2; break;

          case VFF_MAPTYP_4_BYTE: bytes_per_pixel=4; break;

          case VFF_MAPTYP_FLOAT: bytes_per_pixel=4; break;

          case VFF_MAPTYP_DOUBLE: bytes_per_pixel=8; break;

          default: bytes_per_pixel=1; break;

        }

        image->colors=viff_info.map_columns;

        count=(ssize_t) (bytes_per_pixel*image->colors*viff_info.map_rows);

        if ((MagickSizeType) count > GetBlobSize(image))

          ThrowReaderException(CorruptImageError,"InsufficientImageDataInFile");

        if ((MagickSizeType) viff_info.map_rows >

            (viff_info.map_rows*bytes_per_pixel*sizeof(*viff_colormap)))

          ThrowReaderException(CorruptImageError,"ImproperImageHeader");

        if (AcquireImageColormap(image,image->colors,exception) == MagickFalse)

          ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");

        viff_colormap=(unsigned char *) AcquireQuantumMemory(image->colors,

          viff_info.map_rows*bytes_per_pixel*sizeof(*viff_colormap));

        if (viff_colormap == (unsigned char *) NULL)

          ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");

        /*

          Read VIFF raster colormap.

        */

        if (ReadBlob(image,(size_t) count,viff_colormap) != count)

          {

            viff_colormap=(unsigned char *) RelinquishMagickMemory(

              viff_colormap);

            ThrowReaderException(CorruptImageError,

              "InsufficientImageDataInFile");

          }

        lsb_first=1;

        if (*(char *) &lsb_first &&

            ((viff_info.machine_dependency != VFF_DEP_DECORDER) &&

             (viff_info.machine_dependency != VFF_DEP_NSORDER)))

          switch ((int) viff_info.map_storage_type)

          {

            case VFF_MAPTYP_2_BYTE:

            {

              MSBOrderShort(viff_colormap,(bytes_per_pixel*image->colors*

                viff_info.map_rows));

              break;

            }

            case VFF_MAPTYP_4_BYTE:

            case VFF_MAPTYP_FLOAT:

            {

              MSBOrderLong(viff_colormap,(bytes_per_pixel*image->colors*

                viff_info.map_rows));

              break;

            }

            default: break;

          }

        for (i=0; i < (ssize_t) (viff_info.map_rows*image->colors); i++)

        {

          switch ((int) viff_info.map_storage_type)

          {

            case VFF_MAPTYP_2_BYTE: value=1.0*((short *) viff_colormap)[i]; break;

            case VFF_MAPTYP_4_BYTE: value=1.0*((int *) viff_colormap)[i]; break;

            case VFF_MAPTYP_FLOAT: value=((float *) viff_colormap)[i]; break;

            case VFF_MAPTYP_DOUBLE: value=((double *) viff_colormap)[i]; break;

            default: value=1.0*viff_colormap[i]; break;

          }

          if (i < (ssize_t) image->colors)

            {

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

                ScaleCharToQuantum((unsigned char) value);

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

                ScaleCharToQuantum((unsigned char) value);

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

                ScaleCharToQuantum((unsigned char) value);

            }

          else

            if (i < (ssize_t) (2*image->colors))

              image->colormap[i % (ssize_t) image->colors].green=

                (MagickRealType) ScaleCharToQuantum((unsigned char) value);

            else

              if (i < (ssize_t) (3*image->colors))

                image->colormap[i % (ssize_t) image->colors].blue=

                  (MagickRealType) ScaleCharToQuantum((unsigned char) value);

        }

        viff_colormap=(unsigned char *) RelinquishMagickMemory(viff_colormap);

        break;

      }

      default:

        ThrowReaderException(CoderError,"ColormapTypeNotSupported");

    }

    if ((image_info->ping != MagickFalse) && (image_info->number_scenes != 0))

      if (image->scene >= (image_info->scene+image_info->number_scenes-1))

        break;

    if (viff_info.data_storage_type == VFF_TYP_BIT)

      {

        /*

          Create bi-level colormap.

        */

        image->colors=2;

        if (AcquireImageColormap(image,image->colors,exception) == MagickFalse)

          ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");

        image->colorspace=GRAYColorspace;

      }

    /*

      Allocate VIFF pixels.

    */

    switch ((int) viff_info.data_storage_type)

    {

      case VFF_TYP_2_BYTE: bytes_per_pixel=2; break;

      case VFF_TYP_4_BYTE: bytes_per_pixel=4; break;

      case VFF_TYP_FLOAT: bytes_per_pixel=4; break;

      case VFF_TYP_DOUBLE: bytes_per_pixel=8; break;

      default: bytes_per_pixel=1; break;

    }

    if (viff_info.data_storage_type == VFF_TYP_BIT)

      {

        if (HeapOverflowSanityCheckGetSize((image->columns+7UL) >> 3UL,image->rows,&max_packets) != MagickFalse)

          ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");

      }

    else

      {

        if (HeapOverflowSanityCheckGetSize((size_t) number_pixels,viff_info.number_data_bands,&max_packets) != MagickFalse)

          ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");

      }

    count=(ssize_t) (bytes_per_pixel*max_packets);

    if ((MagickSizeType) count > GetBlobSize(image))

      ThrowReaderException(CorruptImageError,"ImproperImageHeader");

    pixels=(unsigned char *) AcquireQuantumMemory((size_t) MagickMax(

      number_pixels,max_packets),bytes_per_pixel*sizeof(*pixels));

    if (pixels == (unsigned char *) NULL)

      ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");

    (void) memset(pixels,0,(size_t) MagickMax(number_pixels,max_packets)*

      bytes_per_pixel*sizeof(*pixels));

    if (ReadBlob(image,(size_t) count,pixels) != count)

      {

        pixels=(unsigned char *) RelinquishMagickMemory(pixels);

        ThrowReaderException(CorruptImageError,"ImproperImageHeader");

      }

    lsb_first=1;

    if (*(char *) &lsb_first &&

        ((viff_info.machine_dependency != VFF_DEP_DECORDER) &&

         (viff_info.machine_dependency != VFF_DEP_NSORDER)))

      switch ((int) viff_info.data_storage_type)

      {

        case VFF_TYP_2_BYTE:

        {

          MSBOrderShort(pixels,bytes_per_pixel*max_packets);

          break;

        }

        case VFF_TYP_4_BYTE:

        case VFF_TYP_FLOAT:

        {

          MSBOrderLong(pixels,bytes_per_pixel*max_packets);

          break;

        }

        default: break;

      }

    min_value=0.0;

    scale_factor=1.0;

    if ((viff_info.data_storage_type != VFF_TYP_1_BYTE) &&

        (viff_info.map_scheme == VFF_MS_NONE))

      {

        double

          max_value;

        /*

          Determine scale factor.

        */

        switch ((int) viff_info.data_storage_type)

        {

          case VFF_TYP_2_BYTE: value=1.0*((short *) pixels)[0]; break;

          case VFF_TYP_4_BYTE: value=1.0*((int *) pixels)[0]; break;

          case VFF_TYP_FLOAT: value=((float *) pixels)[0]; break;

          case VFF_TYP_DOUBLE: value=((double *) pixels)[0]; break;

          default: value=1.0*pixels[0]; break;

        }

        max_value=value;

        min_value=value;

        for (i=0; i < (ssize_t) max_packets; i++)

        {

          switch ((int) viff_info.data_storage_type)

          {

            case VFF_TYP_2_BYTE: value=1.0*((short *) pixels)[i]; break;

            case VFF_TYP_4_BYTE: value=1.0*((int *) pixels)[i]; break;

            case VFF_TYP_FLOAT: value=((float *) pixels)[i]; break;

            case VFF_TYP_DOUBLE: value=((double *) pixels)[i]; break;

            default: value=1.0*pixels[i]; break;

          }

          if (value > max_value)

            max_value=value;

          else

            if (value < min_value)

              min_value=value;

        }

        if ((min_value == 0) && (max_value == 0))

          scale_factor=0;

        else

          if (min_value == max_value)

            {

              scale_factor=(double) QuantumRange/min_value;

              min_value=0;

            }

          else

            scale_factor=(double) QuantumRange/(max_value-min_value);

      }

    /*

      Convert pixels to Quantum size.

    */

    p=(unsigned char *) pixels;

    for (i=0; i < (ssize_t) max_packets; i++)

    {

      switch ((int) viff_info.data_storage_type)

      {

        case VFF_TYP_2_BYTE: value=1.0*((short *) pixels)[i]; break;

        case VFF_TYP_4_BYTE: value=1.0*((int *) pixels)[i]; break;

        case VFF_TYP_FLOAT: value=((float *) pixels)[i]; break;

        case VFF_TYP_DOUBLE: value=((double *) pixels)[i]; break;

        default: value=1.0*pixels[i]; break;

      }

      if (viff_info.map_scheme == VFF_MS_NONE)

        value=(value-min_value)*scale_factor;

      *p=(unsigned char) ClampToQuantum(value);

      p++;

    }

    /*

      Convert VIFF raster image to pixel packets.

    */

    p=(unsigned char *) pixels;

    if (viff_info.data_storage_type == VFF_TYP_BIT)

      {

        /*

          Convert bitmap scanline.

        */

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

        {

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

          if (q == (Quantum *) NULL)

            break;

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

          {

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

            {

              quantum=(size_t) ((*p) & (0x01 << bit) ? 0 : 1);

              SetPixelRed(image,quantum == 0 ? 0 : QuantumRange,q);

              SetPixelGreen(image,quantum == 0 ? 0 : QuantumRange,q);

              SetPixelBlue(image,quantum == 0 ? 0 : QuantumRange,q);

              if (image->storage_class == PseudoClass)

                SetPixelIndex(image,(Quantum) quantum,q);

              q+=(ptrdiff_t) GetPixelChannels(image);

            }

            p++;

          }

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

            {

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

              {

                quantum=(size_t) ((*p) & (0x01 << bit) ? 0 : 1);

                SetPixelRed(image,quantum == 0 ? 0 : QuantumRange,q);

                SetPixelGreen(image,quantum == 0 ? 0 : QuantumRange,q);

                SetPixelBlue(image,quantum == 0 ? 0 : QuantumRange,q);

                if (image->storage_class == PseudoClass)

                  SetPixelIndex(image,(Quantum) quantum,q);

                q+=(ptrdiff_t) GetPixelChannels(image);

              }

              p++;

            }

          if (SyncAuthenticPixels(image,exception) == MagickFalse)

            break;

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

            {

              status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,

                image->rows);

              if (status == MagickFalse)

                break;

            }

        }

      }

    else

      if (image->storage_class == PseudoClass)

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

        {

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

          if (q == (Quantum *) NULL)

            break;

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

          {

            SetPixelIndex(image,*p++,q);

            q+=(ptrdiff_t) GetPixelChannels(image);

          }

          if (SyncAuthenticPixels(image,exception) == MagickFalse)

            break;

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

            {

              status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,

                image->rows);

              if (status == MagickFalse)

                break;

            }

        }

      else

        {

          /*

            Convert DirectColor scanline.

          */

          number_pixels=(MagickSizeType) image->columns*image->rows;

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

          {

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

            if (q == (Quantum *) NULL)

              break;

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

            {

              SetPixelRed(image,ScaleCharToQuantum(*p),q);

              SetPixelGreen(image,ScaleCharToQuantum(*(p+number_pixels)),q);

              SetPixelBlue(image,ScaleCharToQuantum(*(p+2*number_pixels)),q);

              if (image->colors != 0)

                {

                  ssize_t

                    index;

                  index=(ssize_t) GetPixelRed(image,q);

                  SetPixelRed(image,ClampToQuantum(image->colormap[

                    ConstrainColormapIndex(image,index,exception)].red),q);

                  index=(ssize_t) GetPixelGreen(image,q);

                  SetPixelGreen(image,ClampToQuantum(image->colormap[

                    ConstrainColormapIndex(image,index,exception)].green),q);

                  index=(ssize_t) GetPixelBlue(image,q);

                  SetPixelBlue(image,ClampToQuantum(image->colormap[

                    ConstrainColormapIndex(image,index,exception)].blue),q);

                }

              SetPixelAlpha(image,image->alpha_trait != UndefinedPixelTrait ?

                ScaleCharToQuantum(*(p+number_pixels*3)) : OpaqueAlpha,q);

              p++;

              q+=(ptrdiff_t) GetPixelChannels(image);

            }

            if (SyncAuthenticPixels(image,exception) == MagickFalse)

              break;

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

              {

                status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,

                image->rows);

                if (status == MagickFalse)

                  break;

              }

          }

        }

    pixels=(unsigned char *) RelinquishMagickMemory(pixels);

    if (image->storage_class == PseudoClass)

      (void) SyncImage(image,exception);

    if (EOFBlob(image) != MagickFalse)

      ThrowReaderException(CorruptImageError,"UnexpectedEndOfFile");

    /*

      Proceed to next image.

    */

    if (image_info->number_scenes != 0)

      if (image->scene >= (image_info->scene+image_info->number_scenes-1))

        break;

    count=ReadBlob(image,1,&viff_info.identifier);

    if ((count == 1) && (viff_info.identifier == 0xab))

      {

        /*

          Allocate next image structure.

        */

        AcquireNextImage(image_info,image,exception);

        if (GetNextImageInList(image) == (Image *) NULL)

          {

            status=MagickFalse;

            break;

          }

        image=SyncNextImageInList(image);

        status=SetImageProgress(image,LoadImagesTag,TellBlob(image),

          GetBlobSize(image));

        if (status == MagickFalse)

          break;

      }

  } while ((count != 0) && (viff_info.identifier == 0xab));

  if (CloseBlob(image) == MagickFalse)

    status=MagickFalse;

  if (status == MagickFalse)

    return(DestroyImageList(image));

  return(GetFirstImageInList(image));

}

/*

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

%                                                                             %

%                                                                             %

%                                                                             %

%   R e g i s t e r V I F F I m a g e                                         %

%                                                                             %

%                                                                             %

%                                                                             %

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

%

%  RegisterVIFFImage() adds properties for the VIFF image format to

%  the list of supported formats.  The properties 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 RegisterVIFFImage method is:

%

%      size_t RegisterVIFFImage(void)

%

*/

ModuleExport size_t RegisterVIFFImage(void)

{

  MagickInfo

    *entry;

  entry=AcquireMagickInfo("VIFF","VIFF","Khoros Visualization image");

  entry->decoder=(DecodeImageHandler *) ReadVIFFImage;

  entry->encoder=(EncodeImageHandler *) WriteVIFFImage;

  entry->magick=(IsImageFormatHandler *) IsVIFF;

  entry->flags|=CoderDecoderSeekableStreamFlag;

  (void) RegisterMagickInfo(entry);

  entry=AcquireMagickInfo("VIFF","XV","Khoros Visualization image");

  entry->decoder=(DecodeImageHandler *) ReadVIFFImage;

  entry->encoder=(EncodeImageHandler *) WriteVIFFImage;

  entry->flags|=CoderDecoderSeekableStreamFlag;

  (void) RegisterMagickInfo(entry);

  return(MagickImageCoderSignature);

}

/*

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

%                                                                             %

%                                                                             %

%                                                                             %

%   U n r e g i s t e r V I F F I m a g e                                     %

%                                                                             %

%                                                                             %

%                                                                             %

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

%

%  UnregisterVIFFImage() removes format registrations made by the

%  VIFF module from the list of supported formats.

%

%  The format of the UnregisterVIFFImage method is:

%

%      UnregisterVIFFImage(void)

%

*/

ModuleExport void UnregisterVIFFImage(void)

{

  (void) UnregisterMagickInfo("VIFF");

  (void) UnregisterMagickInfo("XV");

}

/*

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

%                                                                             %

%                                                                             %

%                                                                             %

%   W r i t e V I F F I m a g e                                               %

%                                                                             %

%                                                                             %

%                                                                             %

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

%

%  WriteVIFFImage() writes an image to a file in the VIFF image format.

%

%  The format of the WriteVIFFImage method is:

%

%      MagickBooleanType WriteVIFFImage(const ImageInfo *image_info,

%        Image *image,ExceptionInfo *exception)

%

%  A description of each parameter follows.

%

%    o image_info: the image info.

%

%    o image:  The image.

%

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

%

*/

static MagickBooleanType WriteVIFFImage(const ImageInfo *image_info,

  Image *image,ExceptionInfo *exception)

{

#define VFF_CM_genericRGB  15

#define VFF_CM_NONE  0

#define VFF_DEP_IEEEORDER  0x2

#define VFF_DES_RAW  0

#define VFF_LOC_IMPLICIT  1

#define VFF_MAPTYP_NONE  0

#define VFF_MAPTYP_1_BYTE  1

#define VFF_MS_NONE  0

#define VFF_MS_ONEPERBAND  1

#define VFF_TYP_BIT  0

#define VFF_TYP_1_BYTE  1

  typedef struct _ViffInfo

  {

    char

      identifier,

      file_type,

      release,

      version,

      machine_dependency,

      reserve[3],

      comment[512];

    size_t

      rows,

      columns,

      subrows;

    int

      x_offset,

      y_offset;

    unsigned int

      x_bits_per_pixel,

      y_bits_per_pixel,

      location_type,

      location_dimension,

      number_of_images,

      number_data_bands,

      data_storage_type,

      data_encode_scheme,

      map_scheme,

      map_storage_type,

      map_rows,

      map_columns,

      map_subrows,

      map_enable,

      maps_per_cycle,

      color_space_model;

  } ViffInfo;

  const char

    *value;

  const Quantum

    *p;

  MagickBooleanType

    status;

  MagickOffsetType

    scene;

  MagickSizeType

    number_pixels,

    packets;

  MemoryInfo

    *pixel_info;

  size_t

    number_scenes;

  ssize_t

    i,

    x,

    y;

  unsigned char

    *pixels,

    *q;

  ViffInfo

    viff_info;

  /*

    Open output image file.

  */

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

  assert(image_info->signature == MagickCoreSignature);

  assert(image != (Image *) NULL);

  assert(image->signature == MagickCoreSignature);

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

  assert(exception->signature == MagickCoreSignature);

  if (IsEventLogging() != MagickFalse)

    (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);

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

  if (status == MagickFalse)

    return(status);

  (void) memset(&viff_info,0,sizeof(ViffInfo));

  scene=0;

  number_scenes=GetImageListLength(image);

  do

  {

    MagickBooleanType

      is_gray;

    /*

      Initialize VIFF image structure.

    */

    (void) TransformImageColorspace(image,sRGBColorspace,exception);

    viff_info.identifier=(char) -85;

    viff_info.file_type=1;

    viff_info.release=1;

    viff_info.version=3;

    viff_info.machine_dependency=VFF_DEP_IEEEORDER;  /* IEEE byte ordering */

    *viff_info.comment='\0';

    value=GetImageProperty(image,"comment",exception);

    if (value != (const char *) NULL)

      (void) CopyMagickString(viff_info.comment,value,MagickMin(strlen(value),

        511)+1);

    viff_info.rows=image->columns;

    viff_info.columns=image->rows;

    viff_info.subrows=0;

    viff_info.x_offset=(~0);

    viff_info.y_offset=(~0);

    viff_info.x_bits_per_pixel=0;

    viff_info.y_bits_per_pixel=0;

    viff_info.location_type=VFF_LOC_IMPLICIT;

    viff_info.location_dimension=0;

    viff_info.number_of_images=1;

    viff_info.data_encode_scheme=VFF_DES_RAW;

    viff_info.map_scheme=VFF_MS_NONE;

    viff_info.map_storage_type=VFF_MAPTYP_NONE;

    viff_info.map_rows=0;

    viff_info.map_columns=0;

    viff_info.map_subrows=0;

    viff_info.map_enable=1;  /* no colormap */

    viff_info.maps_per_cycle=0;

    number_pixels=(MagickSizeType) image->columns*image->rows;

    is_gray=IdentifyImageCoderGray(image,exception);

    if (image->storage_class == DirectClass)

      {

        /*

          Full color VIFF raster.

        */

        viff_info.number_data_bands=image->alpha_trait ? 4U : 3U;