Beispiel #1
0
static int flogo_calc_coeff(LogoPrivateData *pd)
{
    /* Set up image/video coefficient lookup tables */
    int i;
    float maxrgbval = (float)MaxRGB; // from GraphicsMagick

    for (i = 0; i <= MAX_UINT8_VAL; i++) {
        float x = (float)ScaleCharToQuantum(i);
        /* Alternatively:
         *  img_coeff = (maxrgbval - x) / maxrgbval;
         *  vid_coeff = x / maxrgbval;
         */
        pd->img_coeff_lookup[i] = 1.0 - (x / maxrgbval);
        pd->vid_coeff_lookup[i] = 1.0 - pd->img_coeff_lookup[i];
    }
    return TC_OK;
}
Beispiel #2
0
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   R e a d S C T I m a g e                                                   %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  Method ReadSCTImage reads a Scitex 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 ReadSCTImage method is:
%
%      Image *ReadSCTImage(const ImageInfo *image_info,ExceptionInfo *exception)
%
%  A description of each parameter follows:
%
%    o image:  Method ReadSCTImage 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.
%
%
*/
static Image *ReadSCTImage(const ImageInfo *image_info,ExceptionInfo *exception)
{
  char
    buffer[768],
    magick[2];

  Image
    *image;

  long
    y;

  register long
    x;

  register PixelPacket
    *q;

  int
    c;

  unsigned int
    status;

  /*
    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 control block.
  */
  do
    {
      if (ReadBlob(image,80,(char *) buffer) != 80)
        break;
      if (ReadBlob(image,2,(char *) magick) != 2)
        break;
      if ((LocaleNCompare((char *) magick,"CT",2) != 0) &&
          (LocaleNCompare((char *) magick,"LW",2) != 0) &&
          (LocaleNCompare((char *) magick,"BM",2) != 0) &&
          (LocaleNCompare((char *) magick,"PG",2) != 0) &&
          (LocaleNCompare((char *) magick,"TX",2) != 0))
        ThrowReaderException(CorruptImageError,ImproperImageHeader,image);
      if ((LocaleNCompare((char *) magick,"LW",2) == 0) ||
          (LocaleNCompare((char *) magick,"BM",2) == 0) ||
          (LocaleNCompare((char *) magick,"PG",2) == 0) ||
          (LocaleNCompare((char *) magick,"TX",2) == 0))
        ThrowReaderException(CoderError,OnlyContinuousTonePictureSupported,image);
      if (ReadBlob(image,174,(char *) buffer) != 174)
        break;
      if (ReadBlob(image,768,(char *) buffer) != 768)
        break;
      /*
        Read parameter block.
      */
      if (ReadBlob(image,32,(char *) buffer) != 32)
        break;
      if (ReadBlob(image,14,(char *) buffer) != 14)
        break;
      image->rows=MagickAtoL(buffer) & 0x7FFFFFFF;
      if (ReadBlob(image,14,(char *) buffer) != 14)
        break;
      image->columns=MagickAtoL(buffer) & 0x7FFFFFFF;
      if (ReadBlob(image,196,(char *) buffer) != 196)
        break;
      if (ReadBlob(image,768,(char *) buffer) != 768)
        break;
      image->colorspace=CMYKColorspace;
    }
  while (0);
  if (EOFBlob(image))
    ThrowReaderException(CorruptImageError,UnexpectedEndOfFile,image);
  if (image_info->ping)
    {
      CloseBlob(image);
      return(image);
    }

  if (CheckImagePixelLimits(image, exception) != MagickPass)
    ThrowReaderException(ResourceLimitError,ImagePixelLimitExceeded,image);

  /*
    Convert SCT raster image to pixel packets.
  */
  for (y=0; y < (long) image->rows; y++)
  {
    q=SetImagePixelsEx(image,0,y,image->columns,1,exception);
    if (q == (PixelPacket *) NULL)
      break;
    for (x=0; x < (long) image->columns; x++)
    {
      if ((c = ReadBlobByte(image)) == EOF)
        break;
      q->red=(Quantum) (MaxRGB-ScaleCharToQuantum(c));
      q++;
    }
    if ((image->columns % 2) != 0)
      if (ReadBlobByte(image) == EOF)  /* pad */
        break;
    q=GetImagePixelsEx(image,0,y,image->columns,1,exception);
    if (q == (PixelPacket *) NULL)
      break;
    for (x=0; x < (long) image->columns; x++)
    {
      if ((c = ReadBlobByte(image)) == EOF)
        break;
      q->green=(Quantum) (MaxRGB-ScaleCharToQuantum(c));
      q++;
    }
    if ((image->columns % 2) != 0)
      if (ReadBlobByte(image) == EOF)  /* pad */
        break;
    q=GetImagePixelsEx(image,0,y,image->columns,1,exception);
    if (q == (PixelPacket *) NULL)
      break;
    for (x=0; x < (long) image->columns; x++)
    {
      if ((c = ReadBlobByte(image)) == EOF)
        break;
      q->blue=(Quantum) (MaxRGB-ScaleCharToQuantum(c));
      q++;
    }
    if ((image->columns % 2) != 0)
      if (ReadBlobByte(image) == EOF)  /* pad */
        break;
    q=GetImagePixelsEx(image,0,y,image->columns,1,exception);
    if (q == (PixelPacket *) NULL)
      break;
    for (x=0; x < (long) image->columns; x++)
    {
      if ((c = ReadBlobByte(image)) == EOF)
        break;
      q->opacity=(Quantum) (MaxRGB-ScaleCharToQuantum(c));
      q++;
    }
    if (!SyncImagePixelsEx(image,exception))
      break;
    if ((image->columns % 2) != 0)
      if (ReadBlobByte(image) == EOF)  /* pad */
        break;
    if (QuantumTick(y,image->rows))
      if (!MagickMonitorFormatted(y,image->rows,exception,LoadImageText,
                                  image->filename,
				  image->columns,image->rows))
        break;
    if (EOFBlob(image))
      break;
  }
  if (EOFBlob(image))
    ThrowException(exception,CorruptImageError,UnexpectedEndOfFile,
      image->filename);
  CloseBlob(image);
  return(image);
}
Beispiel #3
0
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%  R e a d T I M I m a g e                                                    %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  ReadTIMImage() reads a PSX TIM image file and returns it.  It
%  allocates the memory necessary for the new Image structure and returns a
%  pointer to the new image.
%
%  Contributed by [email protected].
%
%  The format of the ReadTIMImage method is:
%
%      Image *ReadTIMImage(const ImageInfo *image_info,ExceptionInfo *exception)
%
%  A description of each parameter follows:
%
%    o image_info: the image info.
%
%    o exception: return any errors or warnings in this structure.
%
*/
static Image *ReadTIMImage(const ImageInfo *image_info,ExceptionInfo *exception)
{
  typedef struct _TIMInfo
  {
    size_t
      id,
      flag;
  } TIMInfo;

  TIMInfo
    tim_info;

  Image
    *image;

  int
    bits_per_pixel,
    has_clut;

  MagickBooleanType
    status;

  register ssize_t
    x;

  register Quantum
    *q;

  register ssize_t
    i;

  register unsigned char
    *p;

  size_t
    bytes_per_line,
    height,
    image_size,
    pixel_mode,
    width;

  ssize_t
    count,
    y;

  unsigned char
    *tim_data,
    *tim_pixels;

  unsigned short
    word;

  /*
    Open image file.
  */
  assert(image_info != (const ImageInfo *) NULL);
  assert(image_info->signature == MagickSignature);
  if (image_info->debug != MagickFalse)
    (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
      image_info->filename);
  assert(exception != (ExceptionInfo *) NULL);
  assert(exception->signature == MagickSignature);
  image=AcquireImage(image_info,exception);
  status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
  if (status == MagickFalse)
    {
      image=DestroyImageList(image);
      return((Image *) NULL);
    }
  /*
    Determine if this a TIM file.
  */
  tim_info.id=ReadBlobLSBLong(image);
  do
  {
    /*
      Verify TIM identifier.
    */
    if (tim_info.id != 0x00000010)
      ThrowReaderException(CorruptImageError,"ImproperImageHeader");
    tim_info.flag=ReadBlobLSBLong(image);
    has_clut=tim_info.flag & (1 << 3) ? 1 : 0;
    pixel_mode=tim_info.flag & 0x07;
    switch ((int) pixel_mode)
    {
      case 0: bits_per_pixel=4; break;
      case 1: bits_per_pixel=8; break;
      case 2: bits_per_pixel=16; break;
      case 3: bits_per_pixel=24; break;
      default: bits_per_pixel=4; break;
    }
    if (has_clut)
      {
        unsigned char
          *tim_colormap;

        /*
          Read TIM raster colormap.
        */
        (void)ReadBlobLSBLong(image);
        (void)ReadBlobLSBShort(image);
        (void)ReadBlobLSBShort(image);
        width=ReadBlobLSBShort(image);
        height=ReadBlobLSBShort(image);
        image->columns=width;
        image->rows=height;
        if (AcquireImageColormap(image,pixel_mode == 1 ? 256UL : 16UL,exception) == MagickFalse)
          ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
        tim_colormap=(unsigned char *) AcquireQuantumMemory(image->colors,
          2UL*sizeof(*tim_colormap));
        if (tim_colormap == (unsigned char *) NULL)
          ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
        count=ReadBlob(image,2*image->colors,tim_colormap);
        if (count != (ssize_t) (2*image->colors))
          ThrowReaderException(CorruptImageError,"InsufficientImageDataInFile");
        p=tim_colormap;
        for (i=0; i < (ssize_t) image->colors; i++)
        {
          word=(*p++);
          word|=(unsigned short) (*p++ << 8);
          image->colormap[i].blue=ScaleCharToQuantum(
            ScaleColor5to8(1UL*(word >> 10) & 0x1f));
          image->colormap[i].green=ScaleCharToQuantum(
            ScaleColor5to8(1UL*(word >> 5) & 0x1f));
          image->colormap[i].red=ScaleCharToQuantum(
            ScaleColor5to8(1UL*word & 0x1f));
        }
        tim_colormap=(unsigned char *) RelinquishMagickMemory(tim_colormap);
      }
    if ((image_info->ping != MagickFalse) && (image_info->number_scenes != 0))
      if (image->scene >= (image_info->scene+image_info->number_scenes-1))
        break;
    /*
      Read image data.
    */
    (void) ReadBlobLSBLong(image);
    (void) ReadBlobLSBShort(image);
    (void) ReadBlobLSBShort(image);
    width=ReadBlobLSBShort(image);
    height=ReadBlobLSBShort(image);
    image_size=2*width*height;
    bytes_per_line=width*2;
    width=(width*16)/bits_per_pixel;
    tim_data=(unsigned char *) AcquireQuantumMemory(image_size,
      sizeof(*tim_data));
    if (tim_data == (unsigned char *) NULL)
      ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
    count=ReadBlob(image,image_size,tim_data);
    if (count != (ssize_t) (image_size))
      ThrowReaderException(CorruptImageError,"InsufficientImageDataInFile");
    tim_pixels=tim_data;
    /*
      Initialize image structure.
    */
    image->columns=width;
    image->rows=height;
    /*
      Convert TIM raster image to pixel packets.
    */
    switch (bits_per_pixel)
    {
      case 4:
      {
        /*
          Convert PseudoColor scanline.
        */
        for (y=(ssize_t) image->rows-1; y >= 0; y--)
        {
          q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
          if (q == (Quantum *) NULL)
            break;
          p=tim_pixels+y*bytes_per_line;
          for (x=0; x < ((ssize_t) image->columns-1); x+=2)
          {
            SetPixelIndex(image,(*p) & 0x0f,q);
            q+=GetPixelChannels(image);
            SetPixelIndex(image,(*p >> 4) & 0x0f,q);
            p++;
            q+=GetPixelChannels(image);
          }
          if ((image->columns % 2) != 0)
            {
              SetPixelIndex(image,(*p >> 4) & 0x0f,q);
              p++;
              q+=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;
            }
        }
        break;
      }
      case 8:
      {
        /*
          Convert PseudoColor scanline.
        */
        for (y=(ssize_t) image->rows-1; y >= 0; y--)
        {
          q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
          if (q == (Quantum *) NULL)
            break;
          p=tim_pixels+y*bytes_per_line;
          for (x=0; x < (ssize_t) image->columns; x++)
          {
            SetPixelIndex(image,*p++,q);
            q+=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;
            }
        }
        break;
      }
      case 16:
      {
        /*
          Convert DirectColor scanline.
        */
        for (y=(ssize_t) image->rows-1; y >= 0; y--)
        {
          p=tim_pixels+y*bytes_per_line;
          q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
          if (q == (Quantum *) NULL)
            break;
          for (x=0; x < (ssize_t) image->columns; x++)
          {
            word=(*p++);
            word|=(*p++ << 8);
            SetPixelBlue(image,ScaleCharToQuantum(ScaleColor5to8(
              (1UL*word >> 10) & 0x1f)),q);
            SetPixelGreen(image,ScaleCharToQuantum(ScaleColor5to8(
              (1UL*word >> 5) & 0x1f)),q);
            SetPixelRed(image,ScaleCharToQuantum(ScaleColor5to8(
              (1UL*word >> 0) & 0x1f)),q);
            q+=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;
            }
        }
        break;
      }
      case 24:
      {
        /*
          Convert DirectColor scanline.
        */
        for (y=(ssize_t) image->rows-1; y >= 0; y--)
        {
          p=tim_pixels+y*bytes_per_line;
          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++),q);
            SetPixelBlue(image,ScaleCharToQuantum(*p++),q);
            q+=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;
            }
        }
        break;
      }
      default:
        ThrowReaderException(CorruptImageError,"ImproperImageHeader");
    }
    if (image->storage_class == PseudoClass)
      (void) SyncImage(image,exception);
    tim_pixels=(unsigned char *) RelinquishMagickMemory(tim_pixels);
    if (EOFBlob(image) != MagickFalse)
      {
        ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
          image->filename);
        break;
      }
    /*
      Proceed to next image.
    */
    tim_info.id=ReadBlobLSBLong(image);
    if (tim_info.id == 0x00000010)
      {
        /*
          Allocate next image structure.
        */
        AcquireNextImage(image_info,image,exception);
        if (GetNextImageInList(image) == (Image *) NULL)
          {
            image=DestroyImageList(image);
            return((Image *) NULL);
          }
        image=SyncNextImageInList(image);
        status=SetImageProgress(image,LoadImagesTag,TellBlob(image),
          GetBlobSize(image));
        if (status == MagickFalse)
          break;
      }
  } while (tim_info.id == 0x00000010);
Beispiel #4
0
static inline Quantum ReadVIPSPixelNONE(Image *image,
  const VIPSBandFormat format,const VIPSType type)
{
  switch(type)
  {
    case VIPSTypeB_W:
    case VIPSTypeRGB:
      {
        unsigned char
          c;

        switch(format)
        {
          case VIPSBandFormatUCHAR:
          case VIPSBandFormatCHAR:
            c=(unsigned char) ReadBlobByte(image);
            break;
          case VIPSBandFormatUSHORT:
          case VIPSBandFormatSHORT:
            c=(unsigned char) ReadBlobShort(image);
            break;
          case VIPSBandFormatUINT:
          case VIPSBandFormatINT:
            c=(unsigned char) ReadBlobLong(image);
            break;
          case VIPSBandFormatFLOAT:
            c=(unsigned char) ReadBlobFloat(image);
            break;
          case VIPSBandFormatDOUBLE:
            c=(unsigned char) ReadBlobDouble(image);
            break;
          default:
            c=0;
            break;
        }
        return(ScaleCharToQuantum(c));
      }
    case VIPSTypeGREY16:
    case VIPSTypeRGB16:
      {
        unsigned short
          s;

        switch(format)
        {
          case VIPSBandFormatUSHORT:
          case VIPSBandFormatSHORT:
            s=(unsigned short) ReadBlobShort(image);
            break;
          case VIPSBandFormatUINT:
          case VIPSBandFormatINT:
            s=(unsigned short) ReadBlobLong(image);
            break;
          case VIPSBandFormatFLOAT:
            s=(unsigned short) ReadBlobFloat(image);
            break;
          case VIPSBandFormatDOUBLE:
            s=(unsigned short) ReadBlobDouble(image);
            break;
          default:
            s=0;
            break;
        }
        return(ScaleShortToQuantum(s));
      }
    case VIPSTypeCMYK:
    case VIPSTypesRGB:
      switch(format)
      {
        case VIPSBandFormatUCHAR:
        case VIPSBandFormatCHAR:
          return(ScaleCharToQuantum((unsigned char) ReadBlobByte(image)));
        case VIPSBandFormatUSHORT:
        case VIPSBandFormatSHORT:
          return(ScaleShortToQuantum(ReadBlobShort(image)));
        case VIPSBandFormatUINT:
        case VIPSBandFormatINT:
          return(ScaleLongToQuantum(ReadBlobLong(image)));
        case VIPSBandFormatFLOAT:
          return((Quantum) ((float) QuantumRange*(ReadBlobFloat(image)/1.0)));
        case VIPSBandFormatDOUBLE:
          return((Quantum) ((double) QuantumRange*(ReadBlobDouble(
            image)/1.0)));
        default:
          return((Quantum) 0);
      }
    default:
      return((Quantum) 0);
  }
}
Beispiel #5
0
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   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;

    register ssize_t
    x;

    register Quantum
    *q;

    register ssize_t
    i;

    register unsigned char
    *p;

    size_t
    bytes_per_pixel,
    lsb_first,
    max_packets,
    quantum;

    ssize_t
    count,
    y;

    unsigned char
    buffer[7],
           *viff_pixels;

    ViffInfo
    viff_info;

    /*
      Open image file.
    */
    assert(image_info != (const ImageInfo *) NULL);
    assert(image_info->signature == MagickSignature);
    if (image_info->debug != MagickFalse)
        (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
                              image_info->filename);
    assert(exception != (ExceptionInfo *) NULL);
    assert(exception->signature == MagickSignature);
    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 == 0) || ((unsigned char) viff_info.identifier != 0xab))
            ThrowReaderException(CorruptImageError,"NotAVIFFImage");
        /*
          Initialize VIFF image.
        */
        count=ReadBlob(image,7,buffer);
        viff_info.file_type=buffer[0];
        viff_info.release=buffer[1];
        viff_info.version=buffer[2];
        viff_info.machine_dependency=buffer[3];
        count=ReadBlob(image,512,(unsigned char *) viff_info.comment);
        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))
        {
            viff_info.rows=ReadBlobLSBLong(image);
            viff_info.columns=ReadBlobLSBLong(image);
            viff_info.subrows=ReadBlobLSBLong(image);
            viff_info.x_offset=(int) ReadBlobLSBLong(image);
            viff_info.y_offset=(int) ReadBlobLSBLong(image);
            viff_info.x_bits_per_pixel=(float) ReadBlobLSBLong(image);
            viff_info.y_bits_per_pixel=(float) ReadBlobLSBLong(image);
            viff_info.location_type=ReadBlobLSBLong(image);
            viff_info.location_dimension=ReadBlobLSBLong(image);
            viff_info.number_of_images=ReadBlobLSBLong(image);
            viff_info.number_data_bands=ReadBlobLSBLong(image);
            viff_info.data_storage_type=ReadBlobLSBLong(image);
            viff_info.data_encode_scheme=ReadBlobLSBLong(image);
            viff_info.map_scheme=ReadBlobLSBLong(image);
            viff_info.map_storage_type=ReadBlobLSBLong(image);
            viff_info.map_rows=ReadBlobLSBLong(image);
            viff_info.map_columns=ReadBlobLSBLong(image);
            viff_info.map_subrows=ReadBlobLSBLong(image);
            viff_info.map_enable=ReadBlobLSBLong(image);
            viff_info.maps_per_cycle=ReadBlobLSBLong(image);
            viff_info.color_space_model=ReadBlobLSBLong(image);
        }
        else
        {
            viff_info.rows=ReadBlobMSBLong(image);
            viff_info.columns=ReadBlobMSBLong(image);
            viff_info.subrows=ReadBlobMSBLong(image);
            viff_info.x_offset=(int) ReadBlobMSBLong(image);
            viff_info.y_offset=(int) ReadBlobMSBLong(image);
            viff_info.x_bits_per_pixel=(float) ReadBlobMSBLong(image);
            viff_info.y_bits_per_pixel=(float) ReadBlobMSBLong(image);
            viff_info.location_type=ReadBlobMSBLong(image);
            viff_info.location_dimension=ReadBlobMSBLong(image);
            viff_info.number_of_images=ReadBlobMSBLong(image);
            viff_info.number_data_bands=ReadBlobMSBLong(image);
            viff_info.data_storage_type=ReadBlobMSBLong(image);
            viff_info.data_encode_scheme=ReadBlobMSBLong(image);
            viff_info.map_scheme=ReadBlobMSBLong(image);
            viff_info.map_storage_type=ReadBlobMSBLong(image);
            viff_info.map_rows=ReadBlobMSBLong(image);
            viff_info.map_columns=ReadBlobMSBLong(image);
            viff_info.map_subrows=ReadBlobMSBLong(image);
            viff_info.map_enable=ReadBlobMSBLong(image);
            viff_info.maps_per_cycle=ReadBlobMSBLong(image);
            viff_info.color_space_model=ReadBlobMSBLong(image);
        }
        for (i=0; i < 420; i++)
            (void) ReadBlobByte(image);
        image->columns=viff_info.rows;
        image->rows=viff_info.columns;
        image->depth=viff_info.x_bits_per_pixel <= 8 ? 8UL :
                     MAGICKCORE_QUANTUM_DEPTH;
        /*
          Verify that we can read this VIFF image.
        */
        number_pixels=(MagickSizeType) viff_info.columns*viff_info.rows;
        if (number_pixels != (size_t) number_pixels)
            ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
        if (number_pixels == 0)
            ThrowReaderException(CoderError,"ImageColumnOrRowSizeIsNotSupported");
        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.
                */
                image->colors=image->depth <= 8 ? 256UL : 65536UL;
                if (viff_info.data_storage_type == VFF_TYP_BIT)
                    image->colors=2;
                if (AcquireImageColormap(image,image->colors,exception) == 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;
            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.
            */
            count=ReadBlob(image,bytes_per_pixel*image->colors*viff_info.map_rows,
                           viff_colormap);
            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=ScaleCharToQuantum((unsigned char) value);
                    image->colormap[i].green=
                        ScaleCharToQuantum((unsigned char) value);
                    image->colormap[i].blue=ScaleCharToQuantum((unsigned char) value);
                }
                else if (i < (ssize_t) (2*image->colors))
                    image->colormap[i % image->colors].green=
                        ScaleCharToQuantum((unsigned char) value);
                else if (i < (ssize_t) (3*image->colors))
                    image->colormap[i % image->colors].blue=
                        ScaleCharToQuantum((unsigned char) value);
            }
            viff_colormap=(unsigned char *) RelinquishMagickMemory(viff_colormap);
            break;
        }
        default:
            ThrowReaderException(CoderError,"ColormapTypeNotSupported");
        }
        /*
          Initialize image structure.
        */
        image->alpha_trait=viff_info.number_data_bands == 4 ? BlendPixelTrait :
                           UndefinedPixelTrait;
        image->storage_class=(viff_info.number_data_bands < 3 ? PseudoClass :
                              DirectClass);
        image->columns=viff_info.rows;
        image->rows=viff_info.columns;
        if ((image_info->ping != MagickFalse) && (image_info->number_scenes != 0))
            if (image->scene >= (image_info->scene+image_info->number_scenes-1))
                break;
        /*
          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)
            max_packets=((image->columns+7UL) >> 3UL)*image->rows;
        else
            max_packets=(size_t) (number_pixels*viff_info.number_data_bands);
        viff_pixels=(unsigned char *) AcquireQuantumMemory(max_packets,
                    bytes_per_pixel*sizeof(*viff_pixels));
        if (viff_pixels == (unsigned char *) NULL)
            ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
        count=ReadBlob(image,bytes_per_pixel*max_packets,viff_pixels);
        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(viff_pixels,bytes_per_pixel*max_packets);
                break;
            }
            case VFF_TYP_4_BYTE:
            case VFF_TYP_FLOAT:
            {
                MSBOrderLong(viff_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 *) viff_pixels)[0];
                break;
            case VFF_TYP_4_BYTE:
                value=1.0*((int *) viff_pixels)[0];
                break;
            case VFF_TYP_FLOAT:
                value=((float *) viff_pixels)[0];
                break;
            case VFF_TYP_DOUBLE:
                value=((double *) viff_pixels)[0];
                break;
            default:
                value=1.0*viff_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 *) viff_pixels)[i];
                    break;
                case VFF_TYP_4_BYTE:
                    value=1.0*((int *) viff_pixels)[i];
                    break;
                case VFF_TYP_FLOAT:
                    value=((float *) viff_pixels)[i];
                    break;
                case VFF_TYP_DOUBLE:
                    value=((double *) viff_pixels)[i];
                    break;
                default:
                    value=1.0*viff_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 *) viff_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 *) viff_pixels)[i];
                break;
            case VFF_TYP_4_BYTE:
                value=1.0*((int *) viff_pixels)[i];
                break;
            case VFF_TYP_FLOAT:
                value=((float *) viff_pixels)[i];
                break;
            case VFF_TYP_DOUBLE:
                value=((double *) viff_pixels)[i];
                break;
            default:
                value=1.0*viff_pixels[i];
                break;
            }
            if (viff_info.map_scheme == VFF_MS_NONE)
            {
                value=(value-min_value)*scale_factor;
                if (value > QuantumRange)
                    value=QuantumRange;
                else if (value < 0)
                    value=0;
            }
            *p=(unsigned char) value;
            p++;
        }
        /*
          Convert VIFF raster image to pixel packets.
        */
        p=(unsigned char *) viff_pixels;
        if (viff_info.data_storage_type == VFF_TYP_BIT)
        {
            /*
              Convert bitmap scanline.
            */
            (void) SetImageType(image,BilevelType,exception);
            (void) SetImageType(image,PaletteType,exception);
            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++)
                    {
                        if (GetPixelLuma(image,q) < (QuantumRange/2.0))
                        {
                            quantum=(size_t) GetPixelIndex(image,q);
                            quantum|=0x01;
                            SetPixelIndex(image,quantum,q);
                        }
                        q+=GetPixelChannels(image);
                    }
                    p++;
                }
                if ((image->columns % 8) != 0)
                {
                    for (bit=0; bit < (ssize_t) (image->columns % 8); bit++)
                        if (GetPixelLuma(image,q) < (QuantumRange/2.0))
                        {
                            quantum=(size_t) GetPixelIndex(image,q);
                            quantum|=0x01;
                            SetPixelIndex(image,quantum,q);
                            q+=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+=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)
                    {
                        SetPixelRed(image,image->colormap[(ssize_t)
                                                          GetPixelRed(image,q)].red,q);
                        SetPixelGreen(image,image->colormap[(ssize_t)
                                                            GetPixelGreen(image,q)].green,q);
                        SetPixelBlue(image,image->colormap[(ssize_t)
                                                           GetPixelBlue(image,q)].blue,q);
                    }
                    SetPixelAlpha(image,image->alpha_trait == BlendPixelTrait ?
                                  ScaleCharToQuantum(*(p+number_pixels*3)) : OpaqueAlpha,q);
                    p++;
                    q+=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;
                }
            }
        }
        viff_pixels=(unsigned char *) RelinquishMagickMemory(viff_pixels);
        if (image->storage_class == PseudoClass)
            (void) SyncImage(image,exception);
        if (EOFBlob(image) != MagickFalse)
        {
            ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
                               image->filename);
            break;
        }
        /*
          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 != 0) && (viff_info.identifier == 0xab))
        {
            /*
              Allocate next image structure.
            */
            AcquireNextImage(image_info,image,exception);
            if (GetNextImageInList(image) == (Image *) NULL)
            {
                image=DestroyImageList(image);
                return((Image *) NULL);
            }
            image=SyncNextImageInList(image);
            status=SetImageProgress(image,LoadImagesTag,TellBlob(image),
                                    GetBlobSize(image));
            if (status == MagickFalse)
                break;
        }
    } while ((count != 0) && (viff_info.identifier == 0xab));
Beispiel #6
0
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   R e a d M T V I m a g e                                                   %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  ReadMTVImage() reads a MTV 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 ReadMTVImage method is:
%
%      Image *ReadMTVImage(const ImageInfo *image_info,ExceptionInfo *exception)
%
%  A description of each parameter follows:
%
%    o image_info: the image info.
%
%    o exception: return any errors or warnings in this structure.
%
*/
static Image *ReadMTVImage(const ImageInfo *image_info,ExceptionInfo *exception)
{
    char
    buffer[MaxTextExtent];

    Image
    *image;

    MagickBooleanType
    status;

    register ssize_t
    x;

    register PixelPacket
    *q;

    register unsigned char
    *p;

    ssize_t
    count,
    y;

    unsigned char
    *pixels;

    unsigned long
    columns,
    rows;

    /*
      Open image file.
    */
    assert(image_info != (const ImageInfo *) NULL);
    assert(image_info->signature == MagickSignature);
    if (image_info->debug != MagickFalse)
        (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
                              image_info->filename);
    assert(exception != (ExceptionInfo *) NULL);
    assert(exception->signature == MagickSignature);
    image=AcquireImage(image_info);
    status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
    if (status == MagickFalse)
    {
        image=DestroyImageList(image);
        return((Image *) NULL);
    }
    /*
      Read MTV image.
    */
    (void) ReadBlobString(image,buffer);
    count=(ssize_t) sscanf(buffer,"%lu %lu\n",&columns,&rows);
    if (count <= 0)
        ThrowReaderException(CorruptImageError,"ImproperImageHeader");
    do
    {
        /*
          Initialize image structure.
        */
        image->columns=columns;
        image->rows=rows;
        image->depth=8;
        if ((image_info->ping != MagickFalse) && (image_info->number_scenes != 0))
            if (image->scene >= (image_info->scene+image_info->number_scenes-1))
                break;
        /*
          Convert MTV raster image to pixel packets.
        */
        pixels=(unsigned char *) AcquireQuantumMemory((size_t) image->columns,
                3UL*sizeof(*pixels));
        if (pixels == (unsigned char *) NULL)
            ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
        for (y=0; y < (ssize_t) image->rows; y++)
        {
            count=(ssize_t) ReadBlob(image,(size_t) (3*image->columns),pixels);
            if (count != (ssize_t) (3*image->columns))
                ThrowReaderException(CorruptImageError,"UnableToReadImageData");
            p=pixels;
            q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
            if (q == (PixelPacket *) NULL)
                break;
            for (x=0; x < (ssize_t) image->columns; x++)
            {
                SetPixelRed(q,ScaleCharToQuantum(*p++));
                SetPixelGreen(q,ScaleCharToQuantum(*p++));
                SetPixelBlue(q,ScaleCharToQuantum(*p++));
                SetPixelOpacity(q,OpaqueOpacity);
                q++;
            }
            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 (EOFBlob(image) != MagickFalse)
        {
            ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
                               image->filename);
            break;
        }
        /*
          Proceed to next image.
        */
        if (image_info->number_scenes != 0)
            if (image->scene >= (image_info->scene+image_info->number_scenes-1))
                break;
        *buffer='\0';
        (void) ReadBlobString(image,buffer);
        count=(ssize_t) sscanf(buffer,"%lu %lu\n",&columns,&rows);
        if (count > 0)
        {
            /*
              Allocate next image structure.
            */
            AcquireNextImage(image_info,image);
            if (GetNextImageInList(image) == (Image *) NULL)
            {
                image=DestroyImageList(image);
                return((Image *) NULL);
            }
            image=SyncNextImageInList(image);
            status=SetImageProgress(image,LoadImagesTag,TellBlob(image),
                                    GetBlobSize(image));
            if (status == MagickFalse)
                break;
        }
    } while (count > 0);
    (void) CloseBlob(image);
    return(GetFirstImageInList(image));
}
Beispiel #7
0
static MagickBooleanType ReadOneLayer(Image* image,XCFDocInfo* inDocInfo,
  XCFLayerInfo *outLayer )
{
  ssize_t
    i;

  MagickOffsetType
    offset;

  unsigned int
    foundPropEnd = 0;

  size_t
    hierarchy_offset,
    layer_mask_offset;

  /* clear the block! */
  (void) ResetMagickMemory( outLayer, 0, sizeof( XCFLayerInfo ) );
  /* read in the layer width, height, type and name */
  outLayer->width = ReadBlobMSBLong(image);
  outLayer->height = ReadBlobMSBLong(image);
  outLayer->type = ReadBlobMSBLong(image);
  (void) ReadBlobStringWithLongSize(image, outLayer->name,
    sizeof(outLayer->name));
  /* allocate the image for this layer */
  outLayer->image=CloneImage(image,outLayer->width, outLayer->height,MagickTrue,
     &image->exception);
  if (outLayer->image == (Image *) NULL)
    return MagickFalse;
  /* read the layer properties! */
  foundPropEnd = 0;
  while ( (foundPropEnd == MagickFalse) && (EOFBlob(image) == MagickFalse) ) {
  PropType    prop_type = (PropType) ReadBlobMSBLong(image);
  size_t  prop_size = ReadBlobMSBLong(image);
    switch (prop_type)
    {
    case PROP_END:
      foundPropEnd = 1;
      break;
    case PROP_ACTIVE_LAYER:
      outLayer->active = 1;
      break;
    case PROP_FLOATING_SELECTION:
      outLayer->floating_offset = ReadBlobMSBLong(image);
      break;
    case PROP_OPACITY:
      outLayer->opacity = ReadBlobMSBLong(image);
      break;
    case PROP_VISIBLE:
      outLayer->visible = ReadBlobMSBLong(image);
      break;
    case PROP_LINKED:
      outLayer->linked = ReadBlobMSBLong(image);
      break;
    case PROP_PRESERVE_TRANSPARENCY:
      outLayer->preserve_trans = ReadBlobMSBLong(image);
      break;
    case PROP_APPLY_MASK:
      outLayer->apply_mask = ReadBlobMSBLong(image);
      break;
    case PROP_EDIT_MASK:
      outLayer->edit_mask = ReadBlobMSBLong(image);
      break;
    case PROP_SHOW_MASK:
      outLayer->show_mask = ReadBlobMSBLong(image);
      break;
    case PROP_OFFSETS:
      outLayer->offset_x = (ssize_t) ReadBlobMSBLong(image);
      outLayer->offset_y = (ssize_t) ReadBlobMSBLong(image);
      break;
    case PROP_MODE:
      outLayer->mode = ReadBlobMSBLong(image);
      break;
    case PROP_TATTOO:
      outLayer->preserve_trans = ReadBlobMSBLong(image);
      break;
     case PROP_PARASITES:
     {
        for (i=0; i < (ssize_t) prop_size; i++ )
          (void) ReadBlobByte(image);

        /*
       ssize_t base = info->cp;
       GimpParasite *p;
       while (info->cp - base < prop_size)
       {
       p = xcf_load_parasite(info);
       gimp_drawable_parasite_attach(GIMP_DRAWABLE(layer), p);
       gimp_parasite_free(p);
       }
       if (info->cp - base != prop_size)
       g_message ("Error detected while loading a layer's parasites");
       */
     }
     break;
    default:
      /* g_message ("unexpected/unknown layer property: %d (skipping)",
         prop_type); */

      {
      int buf[16];
      ssize_t amount;

      /* read over it... */
      while ((prop_size > 0) && (EOFBlob(image) == MagickFalse))
        {
        amount = (ssize_t) MagickMin(16, prop_size);
        amount = ReadBlob(image, (size_t) amount, (unsigned char *) &buf);
        if (!amount)
          ThrowBinaryException(CorruptImageError,"CorruptImage",
            image->filename);
        prop_size -= (size_t) MagickMin(16, (size_t) amount);
        }
      }
      break;
    }
  }

  if (foundPropEnd == MagickFalse)
    return(MagickFalse);
  /* clear the image based on the layer opacity */
  outLayer->image->background_color.opacity=
    ScaleCharToQuantum((unsigned char) (255-outLayer->opacity));    
  (void) SetImageBackgroundColor(outLayer->image);

  /* set the compositing mode */
  outLayer->image->compose = GIMPBlendModeToCompositeOperator( outLayer->mode );
  if ( outLayer->visible == MagickFalse )
    {
      /* BOGUS: should really be separate member var! */
      outLayer->image->compose = NoCompositeOp;
    }

  /* read the hierarchy and layer mask offsets */
  hierarchy_offset = ReadBlobMSBLong(image);
  layer_mask_offset = ReadBlobMSBLong(image);

  /* read in the hierarchy */
  offset=SeekBlob(image, (MagickOffsetType) hierarchy_offset, SEEK_SET);
  if (offset < 0)
    (void) ThrowMagickException(&image->exception,GetMagickModule(),
      CorruptImageError,"InvalidImageHeader","`%s'",image->filename);
  if (load_hierarchy (image, inDocInfo, outLayer) == 0)
    return(MagickFalse);

  /* read in the layer mask */
  if (layer_mask_offset != 0)
    {
      offset=SeekBlob(image, (MagickOffsetType) layer_mask_offset, SEEK_SET);

#if 0  /* BOGUS: support layer masks! */
      layer_mask = xcf_load_layer_mask (info, gimage);
      if (layer_mask == 0)
  goto error;

      /* set the offsets of the layer_mask */
      GIMP_DRAWABLE (layer_mask)->offset_x = GIMP_DRAWABLE (layer)->offset_x;
      GIMP_DRAWABLE (layer_mask)->offset_y = GIMP_DRAWABLE (layer)->offset_y;

      gimp_layer_add_mask (layer, layer_mask, MagickFalse);

      layer->mask->apply_mask = apply_mask;
      layer->mask->edit_mask  = edit_mask;
      layer->mask->show_mask  = show_mask;
#endif
  }

  /* attach the floating selection... */
#if 0  /* BOGUS: we may need to read this, even if we don't support it! */
  if (add_floating_sel)
    {
      GimpLayer *floating_sel;

      floating_sel = info->floating_sel;
      floating_sel_attach (floating_sel, GIMP_DRAWABLE (layer));
    }
#endif

  return MagickTrue;
}
Beispiel #8
0
static MagickBooleanType load_tile(Image *image,Image *tile_image,
  XCFDocInfo *inDocInfo,XCFLayerInfo *inLayerInfo,size_t data_length)
{
  ExceptionInfo
    *exception;

  ssize_t
    y;

  register ssize_t
    x;

  register PixelPacket
    *q;

  ssize_t
    count;

  unsigned char
    *graydata;

  XCFPixelPacket
    *xcfdata,
    *xcfodata;

  xcfdata=(XCFPixelPacket *) AcquireQuantumMemory(data_length,sizeof(*xcfdata));
  if (xcfdata == (XCFPixelPacket *) NULL)
    ThrowBinaryException(ResourceLimitError,"MemoryAllocationFailed",
      image->filename);
  xcfodata=xcfdata;
  graydata=(unsigned char *) xcfdata;  /* used by gray and indexed */
  count=ReadBlob(image,data_length,(unsigned char *) xcfdata);
  if (count != (ssize_t) data_length)
    ThrowBinaryException(CorruptImageError,"NotEnoughPixelData",
      image->filename);
  exception=(&image->exception);
  for (y=0; y < (ssize_t) tile_image->rows; y++)
  {
    q=QueueAuthenticPixels(tile_image,0,y,tile_image->columns,1,exception);
    if (q == (PixelPacket *) NULL)
      break;
    if (inDocInfo->image_type == GIMP_GRAY)
      {
        for (x=0; x < (ssize_t) tile_image->columns; x++)
        {
          q->red=ScaleCharToQuantum(*graydata);
          q->green=q->red;
          q->blue=q->red;
          q->opacity=ScaleCharToQuantum((unsigned char) (255-
            inLayerInfo->opacity));
          graydata++;
          q++;
        }
      }
    else
      if (inDocInfo->image_type == GIMP_RGB)
        {
          for (x=0; x < (ssize_t) tile_image->columns; x++)
          {
            q->red=ScaleCharToQuantum(xcfdata->red);
            q->green=ScaleCharToQuantum(xcfdata->green);
            q->blue=ScaleCharToQuantum(xcfdata->blue);
            q->opacity=(Quantum) (xcfdata->opacity == 0U ? TransparentOpacity :
              ScaleCharToQuantum((unsigned char) (255-inLayerInfo->opacity)));
            xcfdata++;
            q++;
          }
        }
     if (SyncAuthenticPixels(tile_image,exception) == MagickFalse)
       break;
  }
  xcfodata=(XCFPixelPacket *) RelinquishMagickMemory(xcfodata);
  return MagickTrue;
}
Beispiel #9
0
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   R e a d S C T I m a g e                                                   %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  ReadSCTImage() reads a Scitex 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 ReadSCTImage method is:
%
%      Image *ReadSCTImage(const ImageInfo *image_info,ExceptionInfo *exception)
%
%  A description of each parameter follows:
%
%    o image_info: the image info.
%
%    o exception: return any errors or warnings in this structure.
%
*/
static Image *ReadSCTImage(const ImageInfo *image_info,ExceptionInfo *exception)
{
  char
    magick[2];

  Image
    *image;

  MagickBooleanType
    status;

  double
    height,
    width;

  Quantum
    pixel;

  register ssize_t
    i,
    x;

  register Quantum
    *q;

  ssize_t
    count,
    y;

  unsigned char
    buffer[768];

  size_t
    separations,
    separations_mask,
    units;

  /*
    Open image file.
  */
  assert(image_info != (const ImageInfo *) NULL);
  assert(image_info->signature == MagickSignature);
  if (image_info->debug != MagickFalse)
    (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
      image_info->filename);
  assert(exception != (ExceptionInfo *) NULL);
  assert(exception->signature == MagickSignature);
  image=AcquireImage(image_info,exception);
  status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
  if (status == MagickFalse)
    {
      image=DestroyImageList(image);
      return((Image *) NULL);
    }
  /*
    Read control block.
  */
  count=ReadBlob(image,80,buffer);
  (void) count;
  count=ReadBlob(image,2,(unsigned char *) magick);
  if ((LocaleNCompare((char *) magick,"CT",2) != 0) &&
      (LocaleNCompare((char *) magick,"LW",2) != 0) &&
      (LocaleNCompare((char *) magick,"BM",2) != 0) &&
      (LocaleNCompare((char *) magick,"PG",2) != 0) &&
      (LocaleNCompare((char *) magick,"TX",2) != 0))
    ThrowReaderException(CorruptImageError,"ImproperImageHeader");
  if ((LocaleNCompare((char *) magick,"LW",2) == 0) ||
      (LocaleNCompare((char *) magick,"BM",2) == 0) ||
      (LocaleNCompare((char *) magick,"PG",2) == 0) ||
      (LocaleNCompare((char *) magick,"TX",2) == 0))
    ThrowReaderException(CoderError,"OnlyContinuousTonePictureSupported");
  count=ReadBlob(image,174,buffer);
  count=ReadBlob(image,768,buffer);
  /*
    Read paramter block.
  */
  units=1UL*ReadBlobByte(image);
  if (units == 0)
    image->units=PixelsPerCentimeterResolution;
  separations=1UL*ReadBlobByte(image);
  separations_mask=ReadBlobMSBShort(image);
  count=ReadBlob(image,14,buffer);
  buffer[14]='\0';
  height=StringToDouble((char *) buffer,(char **) NULL);
  count=ReadBlob(image,14,buffer);
  width=StringToDouble((char *) buffer,(char **) NULL);
  count=ReadBlob(image,12,buffer);
  buffer[12]='\0';
  image->rows=StringToUnsignedLong((char *) buffer);
  count=ReadBlob(image,12,buffer);
  image->columns=StringToUnsignedLong((char *) buffer);
  count=ReadBlob(image,200,buffer);
  count=ReadBlob(image,768,buffer);
  if (separations_mask == 0x0f)
    SetImageColorspace(image,CMYKColorspace,exception);
  image->resolution.x=1.0*image->columns/width;
  image->resolution.y=1.0*image->rows/height;
  if (image_info->ping != MagickFalse)
    {
      (void) CloseBlob(image);
      return(GetFirstImageInList(image));
    }
  /*
    Convert SCT raster image to pixel packets.
  */
  for (y=0; y < (ssize_t) image->rows; y++)
  {
    for (i=0; i < (ssize_t) separations; i++)
    {
      q=GetAuthenticPixels(image,0,y,image->columns,1,exception);
      if (q == (Quantum *) NULL)
        break;
      for (x=0; x < (ssize_t) image->columns; x++)
      {
        pixel=(Quantum) ScaleCharToQuantum((unsigned char) ReadBlobByte(image));
        if (image->colorspace == CMYKColorspace)
          pixel=(Quantum) (QuantumRange-pixel);
        switch (i)
        {
          case 0:
          {
            SetPixelRed(image,pixel,q);
            SetPixelGreen(image,pixel,q);
            SetPixelBlue(image,pixel,q);
            break;
          }
          case 1:
          {
            SetPixelGreen(image,pixel,q);
            break;
          }
          case 2:
          {
            SetPixelBlue(image,pixel,q);
            break;
          }
          case 3: 
          {
            if (image->colorspace == CMYKColorspace)
              SetPixelBlack(image,pixel,q);
            break;
          }
        }
        q+=GetPixelChannels(image);
      }
      if (SyncAuthenticPixels(image,exception) == MagickFalse)
        break;
      if ((image->columns % 2) != 0)
        (void) ReadBlobByte(image);  /* pad */
    }
    status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
      image->rows);
    if (status == MagickFalse)
      break;
  }
  if (EOFBlob(image) != MagickFalse)
    ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
      image->filename);
  (void) CloseBlob(image);
  return(GetFirstImageInList(image));
}
Beispiel #10
0
static MagickBooleanType load_tile_rle(Image *image,Image *tile_image,
  XCFDocInfo *inDocInfo,XCFLayerInfo *inLayerInfo,size_t data_length,
  ExceptionInfo *exception)
{
  MagickOffsetType
    size;

  Quantum
    alpha;

  register Quantum
    *q;

  size_t
    length;

  ssize_t
    bytes_per_pixel,
    count,
    i,
    j;

  unsigned char
    data,
    pixel,
    *xcfdata,
    *xcfodata,
    *xcfdatalimit;

  bytes_per_pixel=(ssize_t) inDocInfo->bytes_per_pixel;
  xcfdata=(unsigned char *) AcquireQuantumMemory(data_length,sizeof(*xcfdata));
  if (xcfdata == (unsigned char *) NULL)
    ThrowBinaryException(ResourceLimitError,"MemoryAllocationFailed",
      image->filename);
  xcfodata=xcfdata;
  count=ReadBlob(image, (size_t) data_length, xcfdata);
  xcfdatalimit = xcfodata+count-1;
  alpha=ScaleCharToQuantum((unsigned char) inLayerInfo->alpha);
  for (i=0; i < (ssize_t) bytes_per_pixel; i++)
  {
    q=GetAuthenticPixels(tile_image,0,0,tile_image->columns,tile_image->rows,
      exception);
    if (q == (Quantum *) NULL)
      continue;
    size=(MagickOffsetType) tile_image->rows*tile_image->columns;
    while (size > 0)
    {
      if (xcfdata > xcfdatalimit)
        goto bogus_rle;
      pixel=(*xcfdata++);
      length=(size_t) pixel;
      if (length >= 128)
        {
          length=255-(length-1);
          if (length == 128)
            {
              if (xcfdata >= xcfdatalimit)
                goto bogus_rle;
              length=(size_t) ((*xcfdata << 8) + xcfdata[1]);
              xcfdata+=2;
            }
          size-=length;
          if (size < 0)
            goto bogus_rle;
          if (&xcfdata[length-1] > xcfdatalimit)
            goto bogus_rle;
          while (length-- > 0)
          {
            data=(*xcfdata++);
            switch (i)
            {
              case 0:
              {
                if (inDocInfo->image_type == GIMP_GRAY)
                  SetPixelGray(tile_image,ScaleCharToQuantum(data),q);
                else
                  {
                    SetPixelRed(tile_image,ScaleCharToQuantum(data),q);
                    SetPixelGreen(tile_image,ScaleCharToQuantum(data),q);
                    SetPixelBlue(tile_image,ScaleCharToQuantum(data),q);
                  }
                SetPixelAlpha(tile_image,alpha,q);
                break;
              }
              case 1:
              {
                if (inDocInfo->image_type == GIMP_GRAY)
                  SetPixelAlpha(tile_image,ScaleCharToQuantum(data),q);
                else
                  SetPixelGreen(tile_image,ScaleCharToQuantum(data),q);
                break;
              }
              case 2:
              {
                SetPixelBlue(tile_image,ScaleCharToQuantum(data),q);
                break;
              }
              case 3:
              {
                SetPixelAlpha(tile_image,ScaleCharToQuantum(data),q);
                break;
              }
            }
            q+=GetPixelChannels(tile_image);
          }
        }
      else
        {
          length+=1;
          if (length == 128)
            {
              if (xcfdata >= xcfdatalimit)
                goto bogus_rle;
              length=(size_t) ((*xcfdata << 8) + xcfdata[1]);
              xcfdata+=2;
            }
          size-=length;
          if (size < 0)
            goto bogus_rle;
          if (xcfdata > xcfdatalimit)
            goto bogus_rle;
          pixel=(*xcfdata++);
          for (j=0; j < (ssize_t) length; j++)
          {
            data=pixel;
            switch (i)
            {
              case 0:
              {
                if (inDocInfo->image_type == GIMP_GRAY)
                  SetPixelGray(tile_image,ScaleCharToQuantum(data),q);
                else
                  {
                    SetPixelRed(tile_image,ScaleCharToQuantum(data),q);
                    SetPixelGreen(tile_image,ScaleCharToQuantum(data),q);
                    SetPixelBlue(tile_image,ScaleCharToQuantum(data),q);
                  }
                SetPixelAlpha(tile_image,alpha,q);
                break;
              }
              case 1:
              {
                if (inDocInfo->image_type == GIMP_GRAY)
                  SetPixelAlpha(tile_image,ScaleCharToQuantum(data),q);
                else
                  SetPixelGreen(tile_image,ScaleCharToQuantum(data),q);
                break;
              }
              case 2:
              {
                SetPixelBlue(tile_image,ScaleCharToQuantum(data),q);
                break;
              }
              case 3:
              {
                SetPixelAlpha(tile_image,ScaleCharToQuantum(data),q);
                break;
              }
            }
            q+=GetPixelChannels(tile_image);
          }
        }
    }
    if (SyncAuthenticPixels(tile_image,exception) == MagickFalse)
      break;
  }
  xcfodata=(unsigned char *) RelinquishMagickMemory(xcfodata);
  return(MagickTrue);

  bogus_rle:
    if (xcfodata != (unsigned char *) NULL)
      xcfodata=(unsigned char *) RelinquishMagickMemory(xcfodata);
  return(MagickFalse);
}
Beispiel #11
0
static MagickBooleanType load_tile(Image *image,Image *tile_image,
  XCFDocInfo *inDocInfo,XCFLayerInfo *inLayerInfo,size_t data_length,
  ExceptionInfo *exception)
{
  ssize_t
    y;

  register ssize_t
    x;

  register Quantum
    *q;

  size_t
    extent;

  ssize_t
    count;

  unsigned char
    *graydata;

  XCFPixelInfo
    *xcfdata,
    *xcfodata;

  extent=0;
  if (inDocInfo->image_type == GIMP_GRAY)
    extent=tile_image->columns*tile_image->rows*sizeof(*graydata);
  else
    if (inDocInfo->image_type == GIMP_RGB)
      extent=tile_image->columns*tile_image->rows*sizeof(*xcfdata);
  if (extent > data_length)
    ThrowBinaryException(CorruptImageError,"NotEnoughPixelData",
      image->filename);
  xcfdata=(XCFPixelInfo *) AcquireQuantumMemory(MagickMax(data_length,
    tile_image->columns*tile_image->rows),sizeof(*xcfdata));
  if (xcfdata == (XCFPixelInfo *) NULL)
    ThrowBinaryException(ResourceLimitError,"MemoryAllocationFailed",
      image->filename);
  xcfodata=xcfdata;
  graydata=(unsigned char *) xcfdata;  /* used by gray and indexed */
  count=ReadBlob(image,data_length,(unsigned char *) xcfdata);
  if (count != (ssize_t) data_length)
    ThrowBinaryException(CorruptImageError,"NotEnoughPixelData",
      image->filename);
  for (y=0; y < (ssize_t) tile_image->rows; y++)
  {
    q=GetAuthenticPixels(tile_image,0,y,tile_image->columns,1,exception);
    if (q == (Quantum *) NULL)
      break;
    if (inDocInfo->image_type == GIMP_GRAY)
      {
        for (x=0; x < (ssize_t) tile_image->columns; x++)
        {
          SetPixelGray(tile_image,ScaleCharToQuantum(*graydata),q);
          SetPixelAlpha(tile_image,ScaleCharToQuantum((unsigned char)
            inLayerInfo->alpha),q);
          graydata++;
          q+=GetPixelChannels(tile_image);
        }
      }
    else
      if (inDocInfo->image_type == GIMP_RGB)
        {
          for (x=0; x < (ssize_t) tile_image->columns; x++)
          {
            SetPixelRed(tile_image,ScaleCharToQuantum(xcfdata->red),q);
            SetPixelGreen(tile_image,ScaleCharToQuantum(xcfdata->green),q);
            SetPixelBlue(tile_image,ScaleCharToQuantum(xcfdata->blue),q);
            SetPixelAlpha(tile_image,xcfdata->alpha == 255U ? TransparentAlpha :
              ScaleCharToQuantum((unsigned char) inLayerInfo->alpha),q);
            xcfdata++;
            q+=GetPixelChannels(tile_image);
          }
        }
     if (SyncAuthenticPixels(tile_image,exception) == MagickFalse)
       break;
  }
  xcfodata=(XCFPixelInfo *) RelinquishMagickMemory(xcfodata);
  return MagickTrue;
}
Beispiel #12
0
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   R e a d P A N G O I m a g e                                               %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  ReadPANGOImage() reads an image in the Pango Markup Language Format.
%
%  The format of the ReadPANGOImage method is:
%
%      Image *ReadPANGOImage(const ImageInfo *image_info,
%        ExceptionInfo *exception)
%
%  A description of each parameter follows:
%
%    o image_info: the image info.
%
%    o exception: return any errors or warnings in this structure.
%
*/
static Image *ReadPANGOImage(const ImageInfo *image_info,
  ExceptionInfo *exception)
{
  cairo_font_options_t
    *font_options;

  cairo_surface_t
    *surface;

  char
    *caption,
    *property;

  cairo_t
    *cairo_image;

  const char
    *option;

  DrawInfo
    *draw_info;

  Image
    *image;

  MagickBooleanType
    status;

  PangoAlignment
    align;

  PangoContext
    *context;

  PangoFontMap
    *fontmap;

  PangoGravity
    gravity;

  PangoLayout
    *layout;

  PangoRectangle
    extent;

  PixelInfo
    fill_color;

  RectangleInfo
    page;

  register unsigned char
    *p;

  size_t
    stride;

  ssize_t
    y;

  unsigned char
    *pixels;

  /*
    Initialize Image structure.
  */
  assert(image_info != (const ImageInfo *) NULL);
  assert(image_info->signature == MagickSignature);
  if (image_info->debug != MagickFalse)
    (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
      image_info->filename);
  assert(exception != (ExceptionInfo *) NULL);
  assert(exception->signature == MagickSignature);
  image=AcquireImage(image_info,exception);
  (void) ResetImagePage(image,"0x0+0+0");
  /*
    Format caption.
  */
  option=GetImageArtifact(image,"filename");
  if (option == (const char *) NULL)
    property=InterpretImageProperties(image_info,image,image_info->filename,
      exception);
  else
    if (LocaleNCompare(option,"pango:",6) == 0)
      property=InterpretImageProperties(image_info,image,option+6,exception);
    else
      property=InterpretImageProperties(image_info,image,option,exception);
  (void) SetImageProperty(image,"caption",property,exception);
  property=DestroyString(property);
  caption=ConstantString(GetImageProperty(image,"caption",exception));
  /*
    Get context.
  */
  fontmap=pango_cairo_font_map_new();
  pango_cairo_font_map_set_resolution(PANGO_CAIRO_FONT_MAP(fontmap),
    image->resolution.x == 0.0 ? 90.0 : image->resolution.x);
  font_options=cairo_font_options_create();
  option=GetImageArtifact(image,"pango:hinting");
  if (option != (const char *) NULL)
    {
      if (LocaleCompare(option,"none") != 0)
        cairo_font_options_set_hint_style(font_options,CAIRO_HINT_STYLE_NONE);
      if (LocaleCompare(option,"full") != 0)
        cairo_font_options_set_hint_style(font_options,CAIRO_HINT_STYLE_FULL);
    }
  context=pango_font_map_create_context(fontmap);
  pango_cairo_context_set_font_options(context,font_options);
  cairo_font_options_destroy(font_options);
  option=GetImageArtifact(image,"pango:language");
  if (option != (const char *) NULL)
    pango_context_set_language(context,pango_language_from_string(option));
  draw_info=CloneDrawInfo(image_info,(DrawInfo *) NULL);
  pango_context_set_base_dir(context,draw_info->direction ==
    RightToLeftDirection ? PANGO_DIRECTION_RTL : PANGO_DIRECTION_LTR);
  switch (draw_info->gravity)
  {
    case NorthGravity:
    {
      gravity=PANGO_GRAVITY_NORTH;
      break;
    }
    case NorthWestGravity:
    case WestGravity:
    case SouthWestGravity:
    {
      gravity=PANGO_GRAVITY_WEST;
      break;
    }
    case NorthEastGravity:
    case EastGravity:
    case SouthEastGravity:
    {
      gravity=PANGO_GRAVITY_EAST;
      break;
    }
    case SouthGravity:
    {
      gravity=PANGO_GRAVITY_SOUTH;
      break;
    }
    default:
    {
      gravity=PANGO_GRAVITY_AUTO;
      break;
    }
  }
  pango_context_set_base_gravity(context,gravity);
  option=GetImageArtifact(image,"pango:gravity-hint");
  if (option != (const char *) NULL)
    {
      if (LocaleCompare(option,"line") == 0)
        pango_context_set_gravity_hint(context,PANGO_GRAVITY_HINT_LINE);
      if (LocaleCompare(option,"natural") == 0)
        pango_context_set_gravity_hint(context,PANGO_GRAVITY_HINT_NATURAL);
      if (LocaleCompare(option,"strong") == 0)
        pango_context_set_gravity_hint(context,PANGO_GRAVITY_HINT_STRONG);
    }
  /*
    Configure layout.
  */
  layout=pango_layout_new(context);
  option=GetImageArtifact(image,"pango:auto-dir");
  if (option != (const char *) NULL)
    pango_layout_set_auto_dir(layout,1);
  option=GetImageArtifact(image,"pango:ellipsize");
  if (option != (const char *) NULL)
    {
      if (LocaleCompare(option,"end") == 0)
        pango_layout_set_ellipsize(layout,PANGO_ELLIPSIZE_END);
      if (LocaleCompare(option,"middle") == 0)
        pango_layout_set_ellipsize(layout,PANGO_ELLIPSIZE_MIDDLE);
      if (LocaleCompare(option,"none") == 0)
        pango_layout_set_ellipsize(layout,PANGO_ELLIPSIZE_NONE);
      if (LocaleCompare(option,"start") == 0)
        pango_layout_set_ellipsize(layout,PANGO_ELLIPSIZE_START);
    }
  option=GetImageArtifact(image,"pango:justify");
  if (IfMagickTrue(IsStringTrue(option)))
    pango_layout_set_justify(layout,1);
  option=GetImageArtifact(image,"pango:single-paragraph");
  if (IfMagickTrue(IsStringTrue(option)))
    pango_layout_set_single_paragraph_mode(layout,1);
  option=GetImageArtifact(image,"pango:wrap");
  if (option != (const char *) NULL)
    {
      if (LocaleCompare(option,"char") == 0)
        pango_layout_set_wrap(layout,PANGO_WRAP_CHAR);
      if (LocaleCompare(option,"word") == 0)
        pango_layout_set_wrap(layout,PANGO_WRAP_WORD);
      if (LocaleCompare(option,"word-char") == 0)
        pango_layout_set_wrap(layout,PANGO_WRAP_WORD_CHAR);
    }
  option=GetImageArtifact(image,"pango:indent");
  if (option != (const char *) NULL)
    pango_layout_set_indent(layout,(int) ((StringToLong(option)*
      (image->resolution.x == 0.0 ? 90.0 : image->resolution.x)*PANGO_SCALE+36)/
      90.0+0.5));
  switch (draw_info->align)
  {
    case CenterAlign: align=PANGO_ALIGN_CENTER; break;
    case RightAlign: align=PANGO_ALIGN_RIGHT; break;
    case LeftAlign: align=PANGO_ALIGN_LEFT; break;
    default:
    {
      if (draw_info->gravity == CenterGravity)
        {
          align=PANGO_ALIGN_CENTER;
          break;
        }
      align=PANGO_ALIGN_LEFT;
      break;
    }
  }
  if ((align != PANGO_ALIGN_CENTER) &&
      (draw_info->direction == RightToLeftDirection))
    align=(PangoAlignment) (PANGO_ALIGN_LEFT+PANGO_ALIGN_RIGHT-align);
  pango_layout_set_alignment(layout,align);
  if (draw_info->font != (char *) NULL)
    {
      PangoFontDescription
        *description;

      /*
        Set font.
      */
      description=pango_font_description_from_string(draw_info->font);
      pango_font_description_set_size(description,(int) (PANGO_SCALE*
        draw_info->pointsize+0.5));
      pango_layout_set_font_description(layout,description);
      pango_font_description_free(description);
    }
  option=GetImageArtifact(image,"pango:markup");
  if ((option != (const char *) NULL) && (IsStringTrue(option) == MagickFalse))
    pango_layout_set_text(layout,caption,-1);
  else
    {
      GError
        *error;

      error=(GError *) NULL;
      if (pango_parse_markup(caption,-1,0,NULL,NULL,NULL,&error) == 0)
        (void) ThrowMagickException(exception,GetMagickModule(),CoderError,
          error->message,"`%s'",image_info->filename);
      pango_layout_set_markup(layout,caption,-1);
    }
  pango_layout_context_changed(layout);
  page.x=0;
  page.y=0;
  if (image_info->page != (char *) NULL)
    (void) ParseAbsoluteGeometry(image_info->page,&page);
  if (image->columns == 0)
    {
      pango_layout_get_extents(layout,NULL,&extent);
      image->columns=(extent.x+extent.width+PANGO_SCALE/2)/PANGO_SCALE+2*page.x;
    }
  else
    {
      image->columns-=2*page.x;
      pango_layout_set_width(layout,(int) ((PANGO_SCALE*image->columns*
        (image->resolution.x == 0.0 ? 90.0 : image->resolution.x)+45.0)/90.0+
        0.5));
    }
  if (image->rows == 0)
    {
      pango_layout_get_extents(layout,NULL,&extent);
      image->rows=(extent.y+extent.height+PANGO_SCALE/2)/PANGO_SCALE+2*page.y;
    }
  else
    {
      image->rows-=2*page.y;
      pango_layout_set_height(layout,(int) ((PANGO_SCALE*image->rows*
        (image->resolution.y == 0.0 ? 90.0 : image->resolution.y)+45.0)/90.0+
        0.5));
    }
  /*
    Render markup.
  */
  stride=(size_t) cairo_format_stride_for_width(CAIRO_FORMAT_ARGB32,
    image->columns);
  pixels=(unsigned char *) AcquireQuantumMemory(image->rows,stride*
    sizeof(*pixels));
  if (pixels == (unsigned char *) NULL)
    {
      draw_info=DestroyDrawInfo(draw_info);
      caption=DestroyString(caption);
      ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
    }
  surface=cairo_image_surface_create_for_data(pixels,CAIRO_FORMAT_ARGB32,
    image->columns,image->rows,stride);
  cairo_image=cairo_create(surface);
  cairo_set_operator(cairo_image,CAIRO_OPERATOR_CLEAR);
  cairo_paint(cairo_image);
  cairo_set_operator(cairo_image,CAIRO_OPERATOR_OVER);
  cairo_translate(cairo_image,page.x,page.y);
  pango_cairo_show_layout(cairo_image,layout);
  cairo_destroy(cairo_image);
  cairo_surface_destroy(surface);
  g_object_unref(layout);
  g_object_unref(fontmap);
  /*
    Convert surface to image.
  */
  (void) SetImageBackgroundColor(image,exception);
  p=pixels;
  GetPixelInfo(image,&fill_color);
  for (y=0; y < (ssize_t) image->rows; y++)
  {
    register Quantum
      *q;

    register ssize_t
      x;

    q=GetAuthenticPixels(image,0,y,image->columns,1,exception);
    if (q == (Quantum *) NULL)
      break;
    for (x=0; x < (ssize_t) image->columns; x++)
    {
      double
        gamma;

      fill_color.blue=(double) ScaleCharToQuantum(*p++);
      fill_color.green=(double) ScaleCharToQuantum(*p++);
      fill_color.red=(double) ScaleCharToQuantum(*p++);
      fill_color.alpha=(double) ScaleCharToQuantum(*p++);
      /*
        Disassociate alpha.
      */
      gamma=1.0-QuantumScale*fill_color.alpha;
      gamma=PerceptibleReciprocal(gamma);
      fill_color.blue*=gamma;
      fill_color.green*=gamma;
      fill_color.red*=gamma;
      CompositePixelOver(image,&fill_color,fill_color.alpha,q,(double)
        GetPixelAlpha(image,q),q);
      q+=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;
      }
  }
  /*
    Relinquish resources.
  */
  pixels=(unsigned char *) RelinquishMagickMemory(pixels);
  draw_info=DestroyDrawInfo(draw_info);
  caption=DestroyString(caption);
  return(GetFirstImageInList(image));
}
Beispiel #13
0
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   R e a d S C R E E N S H O T I m a g e                                     %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  ReadSCREENSHOTImage() Takes a screenshot from the monitor(s).
%
%  The format of the ReadSCREENSHOTImage method is:
%
%      Image *ReadXImage(const ImageInfo *image_info,ExceptionInfo *exception)
%
%  A description of each parameter follows:
%
%    o image_info: the image info.
%
%    o exception: return any errors or warnings in this structure.
%
*/
static Image *ReadSCREENSHOTImage(const ImageInfo *image_info,
  ExceptionInfo *exception)
{
  Image
    *image;

  assert(image_info->signature == MagickSignature);
  if (image_info->debug != MagickFalse)
    (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
      image_info->filename);
  assert(exception != (ExceptionInfo *) NULL);
  assert(exception->signature == MagickSignature);
  image=(Image *) NULL;
#if defined(MAGICKCORE_WINGDI32_DELEGATE)
  {
    BITMAPINFO
      bmi;

    DISPLAY_DEVICE
      device;

    HBITMAP
      bitmap,
      bitmapOld;

    HDC
      bitmapDC,
      hDC;

    Image
      *screen;

    int
      i;

    MagickBooleanType
      status;

    register PixelPacket
      *q;

    register ssize_t
      x;

    RGBTRIPLE
      *p;

    ssize_t
      y;

    assert(image_info != (const ImageInfo *) NULL);
    i=0;
    device.cb = sizeof(device);
    image=(Image *) NULL;
    while(EnumDisplayDevices(NULL,i,&device,0) && ++i)
    {
      if ((device.StateFlags & DISPLAY_DEVICE_ACTIVE) != DISPLAY_DEVICE_ACTIVE)
        continue;

      hDC=CreateDC(device.DeviceName,device.DeviceName,NULL,NULL);
      if (hDC == (HDC) NULL)
        ThrowReaderException(CoderError,"UnableToCreateDC");

      screen=AcquireImage(image_info);
      screen->columns=(size_t) GetDeviceCaps(hDC,HORZRES);
      screen->rows=(size_t) GetDeviceCaps(hDC,VERTRES);
      screen->storage_class=DirectClass;
      status=SetImageExtent(screen,screen->columns,screen->rows);
      if (status == MagickFalse)
        {
          InheritException(exception,&image->exception);
          return(DestroyImageList(image));
        }
      if (image == (Image *) NULL)
        image=screen;
      else
        AppendImageToList(&image,screen);

      bitmapDC=CreateCompatibleDC(hDC);
      if (bitmapDC == (HDC) NULL)
        {
          DeleteDC(hDC);
          ThrowReaderException(CoderError,"UnableToCreateDC");
        }
      (void) ResetMagickMemory(&bmi,0,sizeof(BITMAPINFO));
      bmi.bmiHeader.biSize=sizeof(BITMAPINFOHEADER);
      bmi.bmiHeader.biWidth=(LONG) screen->columns;
      bmi.bmiHeader.biHeight=(-1)*(LONG) screen->rows;
      bmi.bmiHeader.biPlanes=1;
      bmi.bmiHeader.biBitCount=24;
      bmi.bmiHeader.biCompression=BI_RGB;
      bitmap=CreateDIBSection(hDC,&bmi,DIB_RGB_COLORS,(void **) &p,NULL,0);
      if (bitmap == (HBITMAP) NULL)
        {
          DeleteDC(hDC);
          DeleteDC(bitmapDC);
          ThrowReaderException(CoderError,"UnableToCreateBitmap");
        }
      bitmapOld=(HBITMAP) SelectObject(bitmapDC,bitmap);
      if (bitmapOld == (HBITMAP) NULL)
        {
          DeleteDC(hDC);
          DeleteDC(bitmapDC);
          DeleteObject(bitmap);
          ThrowReaderException(CoderError,"UnableToCreateBitmap");
        }
      BitBlt(bitmapDC,0,0,(int) screen->columns,(int) screen->rows,hDC,0,0,
        SRCCOPY);
      (void) SelectObject(bitmapDC,bitmapOld);

      for (y=0; y < (ssize_t) screen->rows; y++)
      {
        q=QueueAuthenticPixels(screen,0,y,screen->columns,1,exception);
        if (q == (PixelPacket *) NULL)
          break;
        for (x=0; x < (ssize_t) screen->columns; x++)
        {
          SetPixelRed(q,ScaleCharToQuantum(p->rgbtRed));
          SetPixelGreen(q,ScaleCharToQuantum(p->rgbtGreen));
          SetPixelBlue(q,ScaleCharToQuantum(p->rgbtBlue));
          SetPixelOpacity(q,OpaqueOpacity);
          p++;
          q++;
        }
        if (SyncAuthenticPixels(screen,exception) == MagickFalse)
          break;
      }

      DeleteDC(hDC);
      DeleteDC(bitmapDC);
      DeleteObject(bitmap);
    }
  }
#elif defined(MAGICKCORE_X11_DELEGATE)
  {
    const char
      *option;

    XImportInfo
      ximage_info;

    (void) exception;
    XGetImportInfo(&ximage_info);
    option=GetImageOption(image_info,"x:screen");
    if (option != (const char *) NULL)
      ximage_info.screen=IsMagickTrue(option);
    option=GetImageOption(image_info,"x:silent");
    if (option != (const char *) NULL)
      ximage_info.silent=IsMagickTrue(option);
    image=XImportImage(image_info,&ximage_info);
  }
#endif
  return(image);
}
Beispiel #14
0
static Image *ReadSGIImage(const ImageInfo *image_info,ExceptionInfo *exception)
{
  Image
    *image;

  MagickBooleanType
    status;

  MagickSizeType
    number_pixels;

  MemoryInfo
    *pixel_info;

  register IndexPacket
    *indexes;

  register PixelPacket
    *q;

  register ssize_t
    i,
    x;

  register unsigned char
    *p;

  SGIInfo
    iris_info;

  size_t
    bytes_per_pixel,
    quantum;

  ssize_t
    count,
    y,
    z;

  unsigned char
    *pixels;

  /*
    Open image file.
  */
  assert(image_info != (const ImageInfo *) NULL);
  assert(image_info->signature == MagickSignature);
  if (image_info->debug != MagickFalse)
    (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
      image_info->filename);
  assert(exception != (ExceptionInfo *) NULL);
  assert(exception->signature == MagickSignature);
  image=AcquireImage(image_info);
  status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
  if (status == MagickFalse)
    {
      image=DestroyImageList(image);
      return((Image *) NULL);
    }
  /*
    Read SGI raster header.
  */
  iris_info.magic=ReadBlobMSBShort(image);
  do
  {
    /*
      Verify SGI identifier.
    */
    if (iris_info.magic != 0x01DA)
      ThrowReaderException(CorruptImageError,"ImproperImageHeader");
    iris_info.storage=(unsigned char) ReadBlobByte(image);
    switch (iris_info.storage)
    {
      case 0x00: image->compression=NoCompression; break;
      case 0x01: image->compression=RLECompression; break;
      default:
        ThrowReaderException(CorruptImageError,"ImproperImageHeader");
    }
    iris_info.bytes_per_pixel=(unsigned char) ReadBlobByte(image);
    if ((iris_info.bytes_per_pixel == 0) || (iris_info.bytes_per_pixel > 2))
      ThrowReaderException(CorruptImageError,"ImproperImageHeader");
    iris_info.dimension=ReadBlobMSBShort(image);
    iris_info.columns=ReadBlobMSBShort(image);
    iris_info.rows=ReadBlobMSBShort(image);
    iris_info.depth=ReadBlobMSBShort(image);
    if ((iris_info.depth == 0) || (iris_info.depth > 4))
      ThrowReaderException(CorruptImageError,"ImproperImageHeader");
    iris_info.minimum_value=ReadBlobMSBLong(image);
    iris_info.maximum_value=ReadBlobMSBLong(image);
    iris_info.sans=ReadBlobMSBLong(image);
    (void) ReadBlob(image,sizeof(iris_info.name),(unsigned char *)
      iris_info.name);
    iris_info.name[sizeof(iris_info.name)-1]='\0';
    if (*iris_info.name != '\0')
      (void) SetImageProperty(image,"label",iris_info.name);
    iris_info.pixel_format=ReadBlobMSBLong(image);
    if (iris_info.pixel_format != 0)
      ThrowReaderException(CorruptImageError,"ImproperImageHeader");
    count=ReadBlob(image,sizeof(iris_info.filler),iris_info.filler);
    (void) count;
    image->columns=iris_info.columns;
    image->rows=iris_info.rows;
    image->depth=(size_t) MagickMin(iris_info.depth,MAGICKCORE_QUANTUM_DEPTH);
    if (iris_info.pixel_format == 0)
      image->depth=(size_t) MagickMin((size_t) 8*
        iris_info.bytes_per_pixel,MAGICKCORE_QUANTUM_DEPTH);
    if (iris_info.depth < 3)
      {
        image->storage_class=PseudoClass;
        image->colors=iris_info.bytes_per_pixel > 1 ? 65535 : 256;
      }
    if ((image_info->ping != MagickFalse)  && (image_info->number_scenes != 0))
      if (image->scene >= (image_info->scene+image_info->number_scenes-1))
        break;
    status=SetImageExtent(image,image->columns,image->rows);
    if (status == MagickFalse)
      {
        InheritException(exception,&image->exception);
        return(DestroyImageList(image));
      }
    /*
      Allocate SGI pixels.
    */
    bytes_per_pixel=(size_t) iris_info.bytes_per_pixel;
    number_pixels=(MagickSizeType) iris_info.columns*iris_info.rows;
    if ((4*bytes_per_pixel*number_pixels) != ((MagickSizeType) (size_t)
        (4*bytes_per_pixel*number_pixels)))
      ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
    pixel_info=AcquireVirtualMemory(iris_info.columns,iris_info.rows*4*
      bytes_per_pixel*sizeof(*pixels));
    if (pixel_info == (MemoryInfo *) NULL)
      ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
    pixels=(unsigned char *) GetVirtualMemoryBlob(pixel_info);
    if ((int) iris_info.storage != 0x01)
      {
        unsigned char
          *scanline;

        /*
          Read standard image format.
        */
        scanline=(unsigned char *) AcquireQuantumMemory(iris_info.columns,
          bytes_per_pixel*sizeof(*scanline));
        if (scanline == (unsigned char *) NULL)
          ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
        for (z=0; z < (ssize_t) iris_info.depth; z++)
        {
          p=pixels+bytes_per_pixel*z;
          for (y=0; y < (ssize_t) iris_info.rows; y++)
          {
            count=ReadBlob(image,bytes_per_pixel*iris_info.columns,scanline);
            if (EOFBlob(image) != MagickFalse)
              break;
            if (bytes_per_pixel == 2)
              for (x=0; x < (ssize_t) iris_info.columns; x++)
              {
                *p=scanline[2*x];
                *(p+1)=scanline[2*x+1];
                p+=8;
              }
            else
              for (x=0; x < (ssize_t) iris_info.columns; x++)
              {
                *p=scanline[x];
                p+=4;
              }
          }
        }
        scanline=(unsigned char *) RelinquishMagickMemory(scanline);
      }
    else
      {
        MemoryInfo
          *packet_info;

        size_t
          *runlength;

        ssize_t
          offset,
          *offsets;

        unsigned char
          *packets;

        unsigned int
          data_order;

        /*
          Read runlength-encoded image format.
        */
        offsets=(ssize_t *) AcquireQuantumMemory((size_t) iris_info.rows,
          iris_info.depth*sizeof(*offsets));
        runlength=(size_t *) AcquireQuantumMemory(iris_info.rows,
          iris_info.depth*sizeof(*runlength));
        packet_info=AcquireVirtualMemory((size_t) iris_info.columns+10UL,4UL*
          sizeof(*packets));
        if ((offsets == (ssize_t *) NULL) ||
            (runlength == (size_t *) NULL) ||
            (packet_info == (MemoryInfo *) NULL))
          {
            if (offsets == (ssize_t *) NULL)
              offsets=(ssize_t *) RelinquishMagickMemory(offsets);
            if (runlength == (size_t *) NULL)
              runlength=(size_t *) RelinquishMagickMemory(runlength);
            if (packet_info == (MemoryInfo *) NULL)
              packet_info=RelinquishVirtualMemory(packet_info);
            ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
          }
        packets=(unsigned char *) GetVirtualMemoryBlob(packet_info);
        for (i=0; i < (ssize_t) (iris_info.rows*iris_info.depth); i++)
          offsets[i]=(int) ReadBlobMSBLong(image);
        for (i=0; i < (ssize_t) (iris_info.rows*iris_info.depth); i++)
        {
          runlength[i]=ReadBlobMSBLong(image);
          if (runlength[i] > (4*(size_t) iris_info.columns+10))
            ThrowReaderException(CorruptImageError,"ImproperImageHeader");
        }
        /*
          Check data order.
        */
        offset=0;
        data_order=0;
        for (y=0; ((y < (ssize_t) iris_info.rows) && (data_order == 0)); y++)
          for (z=0; ((z < (ssize_t) iris_info.depth) && (data_order == 0)); z++)
          {
            if (offsets[y+z*iris_info.rows] < offset)
              data_order=1;
            offset=offsets[y+z*iris_info.rows];
          }
        offset=(ssize_t) TellBlob(image);
        if (data_order == 1)
          {
            for (z=0; z < (ssize_t) iris_info.depth; z++)
            {
              p=pixels;
              for (y=0; y < (ssize_t) iris_info.rows; y++)
              {
                if (offset != offsets[y+z*iris_info.rows])
                  {
                    offset=offsets[y+z*iris_info.rows];
                    offset=(ssize_t) SeekBlob(image,(ssize_t) offset,SEEK_SET);
                  }
                count=ReadBlob(image,(size_t) runlength[y+z*iris_info.rows],
                  packets);
                if (EOFBlob(image) != MagickFalse)
                  break;
                offset+=(ssize_t) runlength[y+z*iris_info.rows];
                status=SGIDecode(bytes_per_pixel,(ssize_t)
                  (runlength[y+z*iris_info.rows]/bytes_per_pixel),packets,
                  1L*iris_info.columns,p+bytes_per_pixel*z);
                if (status == MagickFalse)
                  ThrowReaderException(CorruptImageError,"ImproperImageHeader");
                p+=(iris_info.columns*4*bytes_per_pixel);
              }
            }
          }
        else
          {
            MagickOffsetType
              position;

            position=TellBlob(image);
            p=pixels;
            for (y=0; y < (ssize_t) iris_info.rows; y++)
            {
              for (z=0; z < (ssize_t) iris_info.depth; z++)
              {
                if (offset != offsets[y+z*iris_info.rows])
                  {
                    offset=offsets[y+z*iris_info.rows];
                    offset=(ssize_t) SeekBlob(image,(ssize_t) offset,SEEK_SET);
                  }
                count=ReadBlob(image,(size_t) runlength[y+z*iris_info.rows],
                  packets);
                if (EOFBlob(image) != MagickFalse)
                  break;
                offset+=(ssize_t) runlength[y+z*iris_info.rows];
                status=SGIDecode(bytes_per_pixel,(ssize_t)
                  (runlength[y+z*iris_info.rows]/bytes_per_pixel),packets,
                  1L*iris_info.columns,p+bytes_per_pixel*z);
                if (status == MagickFalse)
                  ThrowReaderException(CorruptImageError,"ImproperImageHeader");
              }
              p+=(iris_info.columns*4*bytes_per_pixel);
            }
            offset=(ssize_t) SeekBlob(image,position,SEEK_SET);
          }
        packet_info=RelinquishVirtualMemory(packet_info);
        runlength=(size_t *) RelinquishMagickMemory(runlength);
        offsets=(ssize_t *) RelinquishMagickMemory(offsets);
      }
    /*
      Initialize image structure.
    */
    image->matte=iris_info.depth == 4 ? MagickTrue : MagickFalse;
    image->columns=iris_info.columns;
    image->rows=iris_info.rows;
    /*
      Convert SGI raster image to pixel packets.
    */
    if (image->storage_class == DirectClass)
      {
        /*
          Convert SGI image to DirectClass pixel packets.
        */
        if (bytes_per_pixel == 2)
          {
            for (y=0; y < (ssize_t) image->rows; y++)
            {
              p=pixels+(image->rows-y-1)*8*image->columns;
              q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
              if (q == (PixelPacket *) NULL)
                break;
              for (x=0; x < (ssize_t) image->columns; x++)
              {
                SetPixelRed(q,ScaleShortToQuantum((unsigned short)
                  ((*(p+0) << 8) | (*(p+1)))));
                SetPixelGreen(q,ScaleShortToQuantum((unsigned short)
                  ((*(p+2) << 8) | (*(p+3)))));
                SetPixelBlue(q,ScaleShortToQuantum((unsigned short)
                  ((*(p+4) << 8) | (*(p+5)))));
                SetPixelOpacity(q,OpaqueOpacity);
                if (image->matte != MagickFalse)
                  SetPixelAlpha(q,ScaleShortToQuantum((unsigned short)
                    ((*(p+6) << 8) | (*(p+7)))));
                p+=8;
                q++;
              }
              if (SyncAuthenticPixels(image,exception) == MagickFalse)
                break;
              if (image->previous == (Image *) NULL)
                {
                  status=SetImageProgress(image,LoadImageTag,(MagickOffsetType)
                    y,image->rows);
                  if (status == MagickFalse)
                    break;
                }
            }
          }
        else
          for (y=0; y < (ssize_t) image->rows; y++)
          {
            p=pixels+(image->rows-y-1)*4*image->columns;
            q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
            if (q == (PixelPacket *) NULL)
              break;
            for (x=0; x < (ssize_t) image->columns; x++)
            {
              SetPixelRed(q,ScaleCharToQuantum(*p));
              q->green=ScaleCharToQuantum(*(p+1));
              q->blue=ScaleCharToQuantum(*(p+2));
              SetPixelOpacity(q,OpaqueOpacity);
              if (image->matte != MagickFalse)
                SetPixelAlpha(q,ScaleCharToQuantum(*(p+3)));
              p+=4;
              q++;
            }
            if (SyncAuthenticPixels(image,exception) == MagickFalse)
              break;
            if (image->previous == (Image *) NULL)
              {
                status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
                image->rows);
                if (status == MagickFalse)
                  break;
              }
          }
      }
    else
      {
        /*
          Create grayscale map.
        */
        if (AcquireImageColormap(image,image->colors) == MagickFalse)
          ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
        /*
          Convert SGI image to PseudoClass pixel packets.
        */
        if (bytes_per_pixel == 2)
          {
            for (y=0; y < (ssize_t) image->rows; y++)
            {
              p=pixels+(image->rows-y-1)*8*image->columns;
              q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
              if (q == (PixelPacket *) NULL)
                break;
              indexes=GetAuthenticIndexQueue(image);
              for (x=0; x < (ssize_t) image->columns; x++)
              {
                quantum=(*p << 8);
                quantum|=(*(p+1));
                SetPixelIndex(indexes+x,quantum);
                p+=8;
                q++;
              }
              if (SyncAuthenticPixels(image,exception) == MagickFalse)
                break;
              if (image->previous == (Image *) NULL)
                {
                  status=SetImageProgress(image,LoadImageTag,(MagickOffsetType)
                    y,image->rows);
                  if (status == MagickFalse)
                    break;
                }
            }
          }
        else
          for (y=0; y < (ssize_t) image->rows; y++)
          {
            p=pixels+(image->rows-y-1)*4*image->columns;
            q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
            if (q == (PixelPacket *) NULL)
              break;
            indexes=GetAuthenticIndexQueue(image);
            for (x=0; x < (ssize_t) image->columns; x++)
            {
              SetPixelIndex(indexes+x,*p);
              p+=4;
              q++;
            }
            if (SyncAuthenticPixels(image,exception) == MagickFalse)
              break;
            if (image->previous == (Image *) NULL)
              {
                status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
                image->rows);
                if (status == MagickFalse)
                  break;
              }
          }
        (void) SyncImage(image);
      }
    pixel_info=RelinquishVirtualMemory(pixel_info);
    if (EOFBlob(image) != MagickFalse)
      {
        ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
          image->filename);
        break;
      }
    /*
      Proceed to next image.
    */
    if (image_info->number_scenes != 0)
      if (image->scene >= (image_info->scene+image_info->number_scenes-1))
        break;
    iris_info.magic=ReadBlobMSBShort(image);
    if (iris_info.magic == 0x01DA)
      {
        /*
          Allocate next image structure.
        */
        AcquireNextImage(image_info,image);
        if (GetNextImageInList(image) == (Image *) NULL)
          {
            image=DestroyImageList(image);
            return((Image *) NULL);
          }
        image=SyncNextImageInList(image);
        status=SetImageProgress(image,LoadImagesTag,TellBlob(image),
          GetBlobSize(image));
        if (status == MagickFalse)
          break;
      }
  } while (iris_info.magic == 0x01DA);
  (void) CloseBlob(image);
  return(GetFirstImageInList(image));
}
Beispiel #15
0
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   R e a d A V S I m a g e                                                   %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  ReadAVSImage() reads an AVS 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 ReadAVSImage method is:
%
%      Image *ReadAVSImage(const ImageInfo *image_info,ExceptionInfo *exception)
%
%  A description of each parameter follows:
%
%    o image_info: The image info.
%
%    o exception: return any errors or warnings in this structure.
%
*/
static Image *ReadAVSImage(const ImageInfo *image_info,ExceptionInfo *exception)
{
  Image
    *image;

  long
    y;

  MagickBooleanType
    status;

  register long
    x;

  register PixelPacket
    *q;

  register unsigned char
    *p;

  ssize_t
    count;

  size_t
    length;

  unsigned char
    *pixels;

  unsigned long
    height,
    width;

  /*
    Open image file.
  */
  assert(image_info != (const ImageInfo *) NULL);
  assert(image_info->signature == MagickSignature);
  if (image_info->debug != MagickFalse)
    (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
      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)
    {
      image=DestroyImageList(image);
      return((Image *) NULL);
    }
  /*
    Read AVS X image.
  */
  width=ReadBlobMSBLong(image);
  height=ReadBlobMSBLong(image);
  if ((width == ~0UL) || (height == ~0UL))
    ThrowReaderException(CorruptImageError,"ImproperImageHeader");
  do
  {
    /*
      Convert AVS raster image to pixel packets.
    */
    image->columns=width;
    image->rows=height;
    image->depth=8;
    if ((image_info->ping != MagickFalse) && (image_info->number_scenes != 0))
      if (image->scene >= (image_info->scene+image_info->number_scenes-1))
        break;
    if (SetImageExtent(image,0,0) == MagickFalse)
      {
        InheritException(exception,&image->exception);
        return(DestroyImageList(image));
      }
    length=(size_t) image->columns;
    pixels=(unsigned char *) AcquireQuantumMemory(length,4*sizeof(*pixels));
    if (pixels == (unsigned char *) NULL) 
      ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
    length*=4*sizeof(*pixels);
    for (y=0; y < (long) image->rows; y++)
    {
      count=ReadBlob(image,length,pixels);
      if ((size_t) count != length)
        ThrowReaderException(CorruptImageError,"UnableToReadImageData");
      p=pixels;
      q=SetImagePixels(image,0,y,image->columns,1);
      if (q == (PixelPacket *) NULL)
        break;
      for (x=0; x < (long) image->columns; x++)
      {
        q->opacity=(Quantum) (QuantumRange-ScaleCharToQuantum(*p++));
        q->red=ScaleCharToQuantum(*p++);
        q->green=ScaleCharToQuantum(*p++);
        q->blue=ScaleCharToQuantum(*p++);
        if (q->opacity != OpaqueOpacity)
          image->matte=MagickTrue;
        q++;
      }
      if (SyncImagePixels(image) == MagickFalse)
        break;
      if (image->previous == (Image *) NULL)
        if ((image->progress_monitor != (MagickProgressMonitor) NULL) &&
            (QuantumTick(y,image->rows) != MagickFalse))
          {
            status=image->progress_monitor(LoadImageTag,y,image->rows,
              image->client_data);
            if (status == MagickFalse)
              break;
          }
    }
    pixels=(unsigned char *) RelinquishMagickMemory(pixels);
    if (EOFBlob(image) != MagickFalse)
      {
        ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
          image->filename);
        break;
      }
    /*
      Proceed to next image.
    */
    if (image_info->number_scenes != 0)
      if (image->scene >= (image_info->scene+image_info->number_scenes-1))
        break;
    width=ReadBlobMSBLong(image);
    height=ReadBlobMSBLong(image);
    if ((width != ~0UL) && (height != ~0UL))
      {
        /*
          Allocate next image structure.
        */
        AllocateNextImage(image_info,image);
        if (GetNextImageInList(image) == (Image *) NULL)
          {
            image=DestroyImageList(image);
            return((Image *) NULL);
          }
        image=SyncNextImageInList(image);
        if (image->progress_monitor != (MagickProgressMonitor) NULL)
          {
            status=image->progress_monitor(LoadImagesTag,TellBlob(image),
              GetBlobSize(image),image->client_data);
            if (status == MagickFalse)
              break;
          }
      }
  } while ((width != ~0UL) && (height != ~0UL));
  CloseBlob(image);
  return(GetFirstImageInList(image));
}
Beispiel #16
0
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   R e a d R L A I m a g e                                                   %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  ReadRLAImage() reads a run-length encoded Wavefront RLA image file
%  and returns it.  It allocates the memory necessary for the new Image
%  structure and returns a pointer to the new image.
%
%  Note:  This module was contributed by Lester Vecsey ([email protected]).
%
%  The format of the ReadRLAImage method is:
%
%      Image *ReadRLAImage(const ImageInfo *image_info,ExceptionInfo *exception)
%
%  A description of each parameter follows:
%
%    o image_info: the image info.
%
%    o exception: return any errors or warnings in this structure.
%
*/
static Image *ReadRLAImage(const ImageInfo *image_info,ExceptionInfo *exception)
{
  typedef struct _WindowFrame
  {
    short
      left,
      right,
      bottom,
      top;
  } WindowFrame;

  typedef struct _RLAInfo
  {
    WindowFrame
      window,
      active_window;

    short
      frame,
      storage_type,
      number_channels,
      number_matte_channels,
      number_auxiliary_channels,
      revision;

    char
      gamma[16+1],
      red_primary[24+1],
      green_primary[24+1],
      blue_primary[24+1],
      white_point[24+1];

    int
      job_number;

    char
      name[128+1],
      description[128+1],
      program[64+1],
      machine[32+1],
      user[32+1],
      date[20+1],
      aspect[24+1],
      aspect_ratio[8+1],
      chan[32+1];

    short
      field;

    char
      time[12],
      filter[32];

    short
      bits_per_channel,
      matte_type,
      matte_bits,
      auxiliary_type,
      auxiliary_bits;

    char
      auxiliary[32+1],
      space[36+1];

    int
      next;
  } RLAInfo;

  Image
    *image;

  int
    channel,
    length,
    runlength;

  MagickBooleanType
    status;

  MagickOffsetType
    offset,
    *scanlines;

  register ssize_t
    i,
    x;

  register Quantum
    *q;

  ssize_t
    count,
    y;

  RLAInfo
    rla_info;

  unsigned char
    byte;

  /*
    Open image file.
  */
  assert(image_info != (const ImageInfo *) NULL);
  assert(image_info->signature == MagickCoreSignature);
  if (image_info->debug != MagickFalse)
    (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
      image_info->filename);
  assert(exception != (ExceptionInfo *) NULL);
  assert(exception->signature == MagickCoreSignature);
  image=AcquireImage(image_info,exception);
  status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
  if (status == MagickFalse)
    {
      image=DestroyImageList(image);
      return((Image *) NULL);
    }
  (void) ResetMagickMemory(&rla_info,0,sizeof(rla_info));
  rla_info.window.left=(short) ReadBlobMSBShort(image);
  rla_info.window.right=(short) ReadBlobMSBShort(image);
  rla_info.window.bottom=(short) ReadBlobMSBShort(image);
  rla_info.window.top=(short) ReadBlobMSBShort(image);
  rla_info.active_window.left=(short) ReadBlobMSBShort(image);
  rla_info.active_window.right=(short) ReadBlobMSBShort(image);
  rla_info.active_window.bottom=(short) ReadBlobMSBShort(image);
  rla_info.active_window.top=(short) ReadBlobMSBShort(image);
  rla_info.frame=(short) ReadBlobMSBShort(image);
  rla_info.storage_type=(short) ReadBlobMSBShort(image);
  rla_info.number_channels=(short) ReadBlobMSBShort(image);
  rla_info.number_matte_channels=(short) ReadBlobMSBShort(image);
  if (rla_info.number_channels == 0)
    rla_info.number_channels=3;
  rla_info.number_channels+=rla_info.number_matte_channels;
  rla_info.number_auxiliary_channels=(short) ReadBlobMSBShort(image);
  rla_info.revision=(short) ReadBlobMSBShort(image);
  count=ReadBlob(image,16,(unsigned char *) rla_info.gamma);
  count=ReadBlob(image,24,(unsigned char *) rla_info.red_primary);
  count=ReadBlob(image,24,(unsigned char *) rla_info.green_primary);
  count=ReadBlob(image,24,(unsigned char *) rla_info.blue_primary);
  count=ReadBlob(image,24,(unsigned char *) rla_info.white_point);
  rla_info.job_number=ReadBlobMSBSignedLong(image);
  count=ReadBlob(image,128,(unsigned char *) rla_info.name);
  count=ReadBlob(image,128,(unsigned char *) rla_info.description);
  rla_info.description[127]='\0';
  count=ReadBlob(image,64,(unsigned char *) rla_info.program);
  count=ReadBlob(image,32,(unsigned char *) rla_info.machine);
  count=ReadBlob(image,32,(unsigned char *) rla_info.user);
  count=ReadBlob(image,20,(unsigned char *) rla_info.date);
  count=ReadBlob(image,24,(unsigned char *) rla_info.aspect);
  count=ReadBlob(image,8,(unsigned char *) rla_info.aspect_ratio);
  count=ReadBlob(image,32,(unsigned char *) rla_info.chan);
  rla_info.field=(short) ReadBlobMSBShort(image);
  count=ReadBlob(image,12,(unsigned char *) rla_info.time);
  count=ReadBlob(image,32,(unsigned char *) rla_info.filter);
  rla_info.bits_per_channel=(short) ReadBlobMSBShort(image);
  rla_info.matte_type=(short) ReadBlobMSBShort(image);
  rla_info.matte_bits=(short) ReadBlobMSBShort(image);
  rla_info.auxiliary_type=(short) ReadBlobMSBShort(image);
  rla_info.auxiliary_bits=(short) ReadBlobMSBShort(image);
  count=ReadBlob(image,32,(unsigned char *) rla_info.auxiliary);
  count=ReadBlob(image,36,(unsigned char *) rla_info.space);
  if ((size_t) count != 36)
    ThrowReaderException(CorruptImageError,"UnableToReadImageData");
  rla_info.next=ReadBlobMSBSignedLong(image);
  /*
    Initialize image structure.
  */
  image->alpha_trait=rla_info.number_matte_channels != 0 ? BlendPixelTrait : 
    UndefinedPixelTrait;
  image->columns=(size_t) (rla_info.active_window.right-
    rla_info.active_window.left+1);
  image->rows=(size_t) (rla_info.active_window.top-
    rla_info.active_window.bottom+1);
  if (image_info->ping != MagickFalse)
    {
      (void) CloseBlob(image);
      return(GetFirstImageInList(image));
    }
  status=SetImageExtent(image,image->columns,image->rows,exception);
  if (status == MagickFalse)
    return(DestroyImageList(image));
  scanlines=(MagickOffsetType *) AcquireQuantumMemory(image->rows,
    sizeof(*scanlines));
  if (scanlines == (MagickOffsetType *) NULL)
    ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
  if (*rla_info.description != '\0')
    (void) SetImageProperty(image,"comment",rla_info.description,exception);
  /*
    Read offsets to each scanline data.
  */
  for (i=0; i < (ssize_t) image->rows; i++)
    scanlines[i]=(MagickOffsetType) ReadBlobMSBSignedLong(image);
  /*
    Read image data.
  */
  x=0;
  for (y=0; y < (ssize_t) image->rows; y++)
  {
    offset=SeekBlob(image,scanlines[image->rows-y-1],SEEK_SET);
    if (offset < 0)
      ThrowReaderException(CorruptImageError,"ImproperImageHeader");
    for (channel=0; channel < (int) rla_info.number_channels; channel++)
    {
      length=ReadBlobMSBSignedShort(image);
      while (length > 0)
      {
        byte=(unsigned char) ReadBlobByte(image);
        runlength=byte;
        if (byte > 127)
          runlength=byte-256;
        length--;
        if (length == 0)
          break;
        if (runlength < 0)
          {
            while (runlength < 0)
            {
              q=GetAuthenticPixels(image,(ssize_t) (x % image->columns),
                (ssize_t) (y % image->rows),1,1,exception);
              if (q == (Quantum *) NULL)
                break;
              byte=(unsigned char) ReadBlobByte(image);
              length--;
              switch (channel)
              {
                case 0:
                {
                  SetPixelRed(image,ScaleCharToQuantum(byte),q);
                  break;
                }
                case 1:
                {
                  SetPixelGreen(image,ScaleCharToQuantum(byte),q);
                  break;
                }
                case 2:
                {
                  SetPixelBlue(image,ScaleCharToQuantum(byte),q);
                  break;
                }
                case 3:
                default:
                {
                  SetPixelAlpha(image,ScaleCharToQuantum(byte),q);
                  break;
                }
              }
              if (SyncAuthenticPixels(image,exception) == MagickFalse)
                break;
              x++;
              runlength++;
            }
            continue;
          }
        byte=(unsigned char) ReadBlobByte(image);
        length--;
        runlength++;
        do
        {
          q=GetAuthenticPixels(image,(ssize_t) (x % image->columns),
            (ssize_t) (y % image->rows),1,1,exception);
          if (q == (Quantum *) NULL)
            break;
          switch (channel)
          {
            case 0:
            {
              SetPixelRed(image,ScaleCharToQuantum(byte),q);
              break;
            }
            case 1:
            {
              SetPixelGreen(image,ScaleCharToQuantum(byte),q);
              break;
            }
            case 2:
            {
              SetPixelBlue(image,ScaleCharToQuantum(byte),q);
              break;
            }
            case 3:
            default:
            {
              SetPixelAlpha(image,ScaleCharToQuantum(byte),q);
              break;
            }
          }
          if (SyncAuthenticPixels(image,exception) == MagickFalse)
            break;
          x++;
          runlength--;
        }
        while (runlength > 0);
      }
    }
    status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
      image->rows);
    if (status == MagickFalse)
      break;
  }
  if (EOFBlob(image) != MagickFalse)
    ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
      image->filename);
  scanlines=(MagickOffsetType *) RelinquishMagickMemory(scanlines);
  (void) CloseBlob(image);
  return(GetFirstImageInList(image));
}
Beispiel #17
0
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   R e a d S I X E L I m a g e                                               %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  ReadSIXELImage() reads an X11 pixmap 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 ReadSIXELImage method is:
%
%      Image *ReadSIXELImage(const ImageInfo *image_info,ExceptionInfo *exception)
%
%  A description of each parameter follows:
%
%    o image_info: the image info.
%
%    o exception: return any errors or warnings in this structure.
%
*/
static Image *ReadSIXELImage(const ImageInfo *image_info,ExceptionInfo *exception)
{
  char
    *sixel_buffer;

  Image
    *image;

  MagickBooleanType
    status;

  register char
    *p;

  register IndexPacket
    *indexes;

  register ssize_t
    x;

  register PixelPacket
    *r;

  size_t
    length;

  ssize_t
    i,
    j,
    y;

  unsigned char
    *sixel_pixels,
    *sixel_palette;

  /*
    Open image file.
  */
  assert(image_info != (const ImageInfo *) NULL);
  assert(image_info->signature == MagickSignature);
  if (image_info->debug != MagickFalse)
    (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
      image_info->filename);
  assert(exception != (ExceptionInfo *) NULL);
  assert(exception->signature == MagickSignature);
  image=AcquireImage(image_info);
  status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
  if (status == MagickFalse)
    {
      image=DestroyImageList(image);
      return((Image *) NULL);
    }
  /*
    Read SIXEL file.
  */
  length=MaxTextExtent;
  sixel_buffer=(char *) AcquireQuantumMemory((size_t) length,sizeof(*sixel_buffer));
  p=sixel_buffer;
  if (sixel_buffer != (char *) NULL)
    while (ReadBlobString(image,p) != (char *) NULL)
    {
      if ((*p == '#') && ((p == sixel_buffer) || (*(p-1) == '\n')))
        continue;
      if ((*p == '}') && (*(p+1) == ';'))
        break;
      p+=strlen(p);
      if ((size_t) (p-sixel_buffer+MaxTextExtent) < length)
        continue;
      length<<=1;
      sixel_buffer=(char *) ResizeQuantumMemory(sixel_buffer,length+MaxTextExtent,
        sizeof(*sixel_buffer));
      if (sixel_buffer == (char *) NULL)
        break;
      p=sixel_buffer+strlen(sixel_buffer);
    }
  if (sixel_buffer == (char *) NULL)
    ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");

  /*
    Decode SIXEL
  */
  if (sixel_decode((unsigned char *)sixel_buffer, &sixel_pixels, &image->columns, &image->rows, &sixel_palette, &image->colors) == MagickFalse)
    {
      sixel_buffer=(char *) RelinquishMagickMemory(sixel_buffer);
      ThrowReaderException(CorruptImageError,"CorruptImage");
    }
  sixel_buffer=(char *) RelinquishMagickMemory(sixel_buffer);
  image->depth=24;
  image->storage_class=PseudoClass;
  status=SetImageExtent(image,image->columns,image->rows);
  if (status == MagickFalse)
    {
      InheritException(exception,&image->exception);
      return(DestroyImageList(image));
    }
  if (AcquireImageColormap(image,image->colors) == MagickFalse)
    {
      sixel_pixels=(unsigned char *) RelinquishMagickMemory(sixel_pixels);
      sixel_palette=(unsigned char *) RelinquishMagickMemory(sixel_palette);
      ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
    }
  for (i = 0; i < (ssize_t) image->colors; ++i) {
    image->colormap[i].red   = ScaleCharToQuantum(sixel_palette[i * 4 + 0]);
    image->colormap[i].green = ScaleCharToQuantum(sixel_palette[i * 4 + 1]);
    image->colormap[i].blue  = ScaleCharToQuantum(sixel_palette[i * 4 + 2]);
  }

  j=0;
  if (image_info->ping == MagickFalse)
    {
      /*
        Read image pixels.
      */
      for (y=0; y < (ssize_t) image->rows; y++)
      {
        r=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
        if (r == (PixelPacket *) NULL)
          break;
        indexes=GetAuthenticIndexQueue(image);
        for (x=0; x < (ssize_t) image->columns; x++)
        {
          j=(ssize_t) sixel_pixels[y * image->columns + x];
          SetPixelIndex(indexes+x,j);
          r++;
        }
        if (SyncAuthenticPixels(image,exception) == MagickFalse)
          break;
      }
      if (y < (ssize_t) image->rows)
        {
          sixel_pixels=(unsigned char *) RelinquishMagickMemory(sixel_pixels);
          sixel_palette=(unsigned char *) RelinquishMagickMemory(sixel_palette);
          ThrowReaderException(CorruptImageError,"NotEnoughPixelData");
        }
    }
  /*
    Relinquish resources.
  */
  sixel_pixels=(unsigned char *) RelinquishMagickMemory(sixel_pixels);
  sixel_palette=(unsigned char *) RelinquishMagickMemory(sixel_palette);
  (void) CloseBlob(image);
  return(GetFirstImageInList(image));
}
Beispiel #18
0
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   R e a d H R Z I m a g e                                                   %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  ReadHRZImage() reads a Slow Scan TeleVision 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 ReadHRZImage method is:
%
%      Image *ReadHRZImage(const ImageInfo *image_info,ExceptionInfo *exception)
%
%  A description of each parameter follows:
%
%    o image_info: the image info.
%
%    o exception: return any errors or warnings in this structure.
%
*/
static Image *ReadHRZImage(const ImageInfo *image_info,ExceptionInfo *exception)
{
  Image
    *image;

  MagickBooleanType
    status;

  register ssize_t
    x;

  register Quantum
    *q;

  register unsigned char
    *p;

  ssize_t
    count,
    y;

  size_t
    length;

  unsigned char
    *pixels;

  /*
    Open image file.
  */
  assert(image_info != (const ImageInfo *) NULL);
  assert(image_info->signature == MagickCoreSignature);
  if (image_info->debug != MagickFalse)
    (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
      image_info->filename);
  assert(exception != (ExceptionInfo *) NULL);
  assert(exception->signature == MagickCoreSignature);
  image=AcquireImage(image_info,exception);
  status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
  if (status == MagickFalse)
    {
      image=DestroyImageList(image);
      return((Image *) NULL);
    }
  /*
    Convert HRZ raster image to pixel packets.
  */
  image->columns=256;
  image->rows=240;
  image->depth=8;
  status=SetImageExtent(image,image->columns,image->rows,exception);
  if (status == MagickFalse)
    return(DestroyImageList(image));
  pixels=(unsigned char *) AcquireQuantumMemory(image->columns,3*
    sizeof(*pixels));
  if (pixels == (unsigned char *) NULL) 
    ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
  length=(size_t) (3*image->columns);
  for (y=0; y < (ssize_t) image->rows; y++)
  {
    count=ReadBlob(image,length,pixels);
    if ((size_t) count != length)
      ThrowReaderException(CorruptImageError,"UnableToReadImageData");
    p=pixels;
    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(4**p++),q);
      SetPixelGreen(image,ScaleCharToQuantum(4**p++),q);
      SetPixelBlue(image,ScaleCharToQuantum(4**p++),q);
      SetPixelAlpha(image,OpaqueAlpha,q);
      q+=GetPixelChannels(image);
    }
    if (SyncAuthenticPixels(image,exception) == MagickFalse)
      break;
    if (SetImageProgress(image,LoadImageTag,y,image->rows) == MagickFalse)
      break;
  }
  pixels=(unsigned char *) RelinquishMagickMemory(pixels);
  if (EOFBlob(image) != MagickFalse)
    ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
      image->filename);
  (void) CloseBlob(image);
  return(GetFirstImageInList(image));
}
Beispiel #19
0
static MagickBooleanType load_tile_rle(Image *image,Image *tile_image,
  XCFDocInfo *inDocInfo,XCFLayerInfo *inLayerInfo,size_t data_length)
{
  ExceptionInfo
    *exception;

  ssize_t
    i,
    j;

  MagickOffsetType
    size;

  register PixelPacket
    *q;

  ssize_t
    bytes_per_pixel,
    count;

  size_t
    length;

  unsigned char
    data,
    pixel,
    *xcfdata,
    *xcfodata,
    *xcfdatalimit;

  bytes_per_pixel=(ssize_t) inDocInfo->bytes_per_pixel;
  xcfdata=(unsigned char *) AcquireQuantumMemory(data_length,sizeof(*xcfdata));
  if (xcfdata == (unsigned char *) NULL)
    ThrowBinaryException(ResourceLimitError,"MemoryAllocationFailed",
      image->filename);
  xcfodata=xcfdata;
  count=ReadBlob(image, (size_t) data_length, xcfdata);
  xcfdatalimit = xcfodata+count-1;
  exception=(&image->exception);
  for (i=0; i < (ssize_t) bytes_per_pixel; i++)
  {
    q=GetAuthenticPixels(tile_image,0,0,tile_image->columns,tile_image->rows,
      exception);
    size=(MagickOffsetType) tile_image->rows*tile_image->columns;
    while (size > 0)
    {
      if (xcfdata > xcfdatalimit)
        goto bogus_rle;
      pixel=(*xcfdata++);
      length=(size_t) pixel;
      if (length >= 128)
        {
          length=255-(length-1);
          if (length == 128)
            {
              if (xcfdata >= xcfdatalimit)
                goto bogus_rle;
              length=(size_t) ((*xcfdata << 8) + xcfdata[1]);
              xcfdata+=2;
            }
            size-=length;
            if (size < 0)
              goto bogus_rle;
            if (&xcfdata[length-1] > xcfdatalimit)
              goto bogus_rle;
            while (length-- > 0)
            {
              data=(*xcfdata++);
              switch (i)
              {
                case 0:
                {
                  q->red=ScaleCharToQuantum(data);
                  if (inDocInfo->image_type == GIMP_GRAY)
                    {
                      q->green=ScaleCharToQuantum(data);
                      q->blue=ScaleCharToQuantum(data);
                      q->opacity=ScaleCharToQuantum((unsigned char) (255-
                        inLayerInfo->opacity));
                    }
                  else
                    {
                      q->green= q->red;
                      q->blue= q->red;
                      q->opacity=ScaleCharToQuantum((unsigned char) (255-
                        inLayerInfo->opacity));
                    }
                  break;
                }
                case 1:
                {
                  q->green=ScaleCharToQuantum(data);
                  break;
                }
                case 2:
                {
                  q->blue=ScaleCharToQuantum(data);
                  break;
                }
                case 3:
                {
                  q->opacity=(Quantum) (data == 0 ? TransparentOpacity :
                    ScaleCharToQuantum((unsigned char) (255-
                    inLayerInfo->opacity)));
                  break;
                }
              }
              q++;
            }
          }
        else
          {
            length+=1;
            if (length == 128)
              {
                if (xcfdata >= xcfdatalimit)
                  goto bogus_rle;
                length=(size_t) ((*xcfdata << 8) + xcfdata[1]);
                xcfdata+=2;
              }
            size-=length;
            if (size < 0)
              goto bogus_rle;
            if (xcfdata > xcfdatalimit)
              goto bogus_rle;
            pixel=(*xcfdata++);
            for (j= 0; j < (ssize_t) length; j++)
            {
              data=pixel;
              switch (i)
              {
                case 0:
                {
                  q->red=ScaleCharToQuantum(data);
                  if (inDocInfo->image_type == GIMP_GRAY)
                    {
                      q->green=ScaleCharToQuantum(data);
                      q->blue=ScaleCharToQuantum(data);
                      q->opacity=ScaleCharToQuantum((unsigned char) (255-
                        inLayerInfo->opacity));
                    }
                  else
                    {
                      q->green=q->red;
                      q->blue=q->red;
                      q->opacity=ScaleCharToQuantum((unsigned char) (255-
                        inLayerInfo->opacity));
                    }
                  break;
                }
                case 1:
                {
                  q->green=ScaleCharToQuantum(data);
                  break;
                }
                case 2:
                {
                  q->blue=ScaleCharToQuantum(data);
                  break;
                }
                case 3:
                {
                  q->opacity=(Quantum) (data == 0 ? TransparentOpacity :
                    ScaleCharToQuantum((unsigned char) (255-
                    inLayerInfo->opacity)));
                  break;
                }
              }
              q++;
            }
          }
      }
      if (SyncAuthenticPixels(tile_image,exception) == MagickFalse)
        break;
    }
  xcfodata=(unsigned char *) RelinquishMagickMemory(xcfodata);
  return(MagickTrue);

  bogus_rle:
    if (xcfodata != (unsigned char *) NULL)
      xcfodata=(unsigned char *) RelinquishMagickMemory(xcfodata);
  return(MagickFalse);
}
Beispiel #20
0
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   R e a d S C R I m a g e                                                   %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  ReadSCRImage() reads a Scitex 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 ReadSCRImage method is:
%
%      Image *ReadSCRImage(const ImageInfo *image_info,ExceptionInfo *exception)
%
%  A description of each parameter follows:
%
%    o image_info: the image info.
%
%    o exception: return any errors or warnings in this structure.
%
*/
static Image *ReadSCRImage(const ImageInfo *image_info,ExceptionInfo *exception)
{
    char zxscr[6144];
    char zxattr[768];
    int octetnr;
    int octetline;
    int zoneline;
    int zonenr;
    int octet_val;
    int attr_nr;
    int pix;
    int piy;
    int binar[8];
    int attrbin[8];
    int *pbin;
    int *abin;
    int z;
    int one_nr;
    int ink;
    int paper;
    int bright;

    unsigned char colour_palette[] = {
        0,  0,  0,
        0,  0,192,
        192,  0,  0,
        192,  0,192,
        0,192,  0,
        0,192,192,
        192,192,  0,
        192,192,192,
        0,  0,  0,
        0,  0,255,
        255,  0,  0,
        255,  0,255,
        0,255,  0,
        0,255,255,
        255,255,  0,
        255,255,255
    };

    Image
    *image;

    MagickBooleanType
    status;

    register PixelPacket
    *q;

    ssize_t
    count;

    /*
      Open image file.
    */
    assert(image_info != (const ImageInfo *) NULL);
    assert(image_info->signature == MagickSignature);
    if (image_info->debug != MagickFalse)
        (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
                              image_info->filename);
    assert(exception != (ExceptionInfo *) NULL);
    assert(exception->signature == MagickSignature);
    image=AcquireImage(image_info);
    status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
    if (status == MagickFalse)
    {
        image=DestroyImageList(image);
        return((Image *) NULL);
    }
    image->columns = 256;
    image->rows = 192;
    count=ReadBlob(image,6144,(unsigned char *) zxscr);
    (void) count;
    count=ReadBlob(image,768,(unsigned char *) zxattr);
    for(zonenr=0; zonenr<3; zonenr++)
    {
        for(zoneline=0; zoneline<8; zoneline++)
        {
            for(octetline=0; octetline<8; octetline++)
            {
                for(octetnr=(zoneline*32); octetnr<((zoneline*32)+32); octetnr++)
                {
                    octet_val = zxscr[octetnr+(256*octetline)+(zonenr*2048)];
                    attr_nr = zxattr[octetnr+(256*zonenr)];

                    pix = (((8*octetnr)-(256*zoneline)));
                    piy = ((octetline+(8*zoneline)+(zonenr*64)));

                    pbin = binar;
                    abin = attrbin;

                    one_nr=1;

                    for(z=0; z<8; z++)
                    {
                        if(octet_val&one_nr)
                        {
                            *pbin = 1;
                        } else {
                            *pbin = 0;
                        }
                        one_nr=one_nr*2;
                        pbin++;
                    }

                    one_nr = 1;

                    for(z=0; z<8; z++)
                    {
                        if(attr_nr&one_nr)
                        {
                            *abin = 1;
                        } else {
                            *abin = 0;
                        }
                        one_nr=one_nr*2;
                        abin++;
                    }

                    ink = (attrbin[0]+(2*attrbin[1])+(4*attrbin[2]));
                    paper = (attrbin[3]+(2*attrbin[4])+(4*attrbin[5]));
                    bright = attrbin[6];

                    if(bright) {
                        ink=ink+8;
                        paper=paper+8;
                    }

                    for(z=7; z>-1; z--)
                    {
                        q=QueueAuthenticPixels(image,pix,piy,1,1,exception);

                        if(binar[z])
                        {
                            SetPixelRed(q,ScaleCharToQuantum(
                                            colour_palette[3*ink]));
                            SetPixelGreen(q,ScaleCharToQuantum(
                                              colour_palette[1+(3*ink)]));
                            SetPixelBlue(q,ScaleCharToQuantum(
                                             colour_palette[2+(3*ink)]));
                        } else {
                            SetPixelRed(q,ScaleCharToQuantum(
                                            colour_palette[3*paper]));
                            SetPixelGreen(q,ScaleCharToQuantum(
                                              colour_palette[1+(3*paper)]));
                            SetPixelBlue(q,ScaleCharToQuantum(
                                             colour_palette[2+(3*paper)]));
                        }

                        pix++;
                    }
                }
            }
        }
    }
    (void) CloseBlob(image);
    return(GetFirstImageInList(image));
}
Beispiel #21
0
static Image *ReadCLIPBOARDImage(const ImageInfo *image_info,
  ExceptionInfo *exception)
{
  Image
    *image;

  MagickBooleanType
    status;

  register ssize_t
    x;

  register Quantum
    *q;

  ssize_t
    y;

  assert(image_info != (const ImageInfo *) NULL);
  assert(image_info->signature == MagickSignature);
  if (image_info->debug != MagickFalse)
    (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
      image_info->filename);
  assert(exception != (ExceptionInfo *) NULL);
  assert(exception->signature == MagickSignature);
  image=AcquireImage(image_info,exception);
  {
    HBITMAP
      bitmapH;

    HPALETTE
      hPal;

    OpenClipboard(NULL);
    bitmapH=(HBITMAP) GetClipboardData(CF_BITMAP);
    hPal=(HPALETTE) GetClipboardData(CF_PALETTE);
    CloseClipboard();
    if ( bitmapH == NULL )
      ThrowReaderException(CoderError,"NoBitmapOnClipboard");
    {
      BITMAPINFO
        DIBinfo;

      BITMAP
        bitmap;

      HBITMAP
        hBitmap,
        hOldBitmap;

      HDC
        hDC,
        hMemDC;

      RGBQUAD
        *pBits,
        *ppBits;

      /* create an offscreen DC for the source */
      hMemDC=CreateCompatibleDC(NULL);
      hOldBitmap=(HBITMAP) SelectObject(hMemDC,bitmapH);
      GetObject(bitmapH,sizeof(BITMAP),(LPSTR) &bitmap);
      if ((image->columns == 0) || (image->rows == 0))
        {
          image->columns=bitmap.bmWidth;
          image->rows=bitmap.bmHeight;
        }
      status=SetImageExtent(image,image->columns,image->rows,exception);
      if (status == MagickFalse)
        return(DestroyImageList(image));
      /*
        Initialize the bitmap header info.
      */
      (void) ResetMagickMemory(&DIBinfo,0,sizeof(BITMAPINFO));
      DIBinfo.bmiHeader.biSize=sizeof(BITMAPINFOHEADER);
      DIBinfo.bmiHeader.biWidth=(LONG) image->columns;
      DIBinfo.bmiHeader.biHeight=(-1)*(LONG) image->rows;
      DIBinfo.bmiHeader.biPlanes=1;
      DIBinfo.bmiHeader.biBitCount=32;
      DIBinfo.bmiHeader.biCompression=BI_RGB;
      hDC=GetDC(NULL);
      if (hDC == 0)
        ThrowReaderException(CoderError,"UnableToCreateADC");
      hBitmap=CreateDIBSection(hDC,&DIBinfo,DIB_RGB_COLORS,(void **) &ppBits,
        NULL,0);
      ReleaseDC(NULL,hDC);
      if (hBitmap == 0)
        ThrowReaderException(CoderError,"UnableToCreateBitmap");
      /* create an offscreen DC */
      hDC=CreateCompatibleDC(NULL);
      if (hDC == 0)
        {
          DeleteObject(hBitmap);
          ThrowReaderException(CoderError,"UnableToCreateADC");
        }
      hOldBitmap=(HBITMAP) SelectObject(hDC,hBitmap);
      if (hOldBitmap == 0)
        {
          DeleteDC(hDC);
          DeleteObject(hBitmap);
          ThrowReaderException(CoderError,"UnableToCreateBitmap");
        }
      if (hPal != NULL)
      {
        /* Kenichi Masuko says this needed */
        SelectPalette(hDC, hPal, FALSE);
        RealizePalette(hDC);
      }
      /* bitblt from the memory to the DIB-based one */
      BitBlt(hDC,0,0,(int) image->columns,(int) image->rows,hMemDC,0,0,SRCCOPY);
      /* finally copy the pixels! */
      pBits=ppBits;
      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(pBits->rgbRed),q);
          SetPixelGreen(image,ScaleCharToQuantum(pBits->rgbGreen),q);
          SetPixelBlue(image,ScaleCharToQuantum(pBits->rgbBlue),q);
          SetPixelAlpha(image,OpaqueAlpha,q);
          pBits++;
          q+=GetPixelChannels(image);
        }
        if (SyncAuthenticPixels(image,exception) == MagickFalse)
          break;
      }
      DeleteDC(hDC);
      DeleteObject(hBitmap);
    }
  }
  (void) CloseBlob(image);
  return(GetFirstImageInList(image));
}
Beispiel #22
0
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   R e a d Y U V I m a g e                                                   %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  ReadYUVImage() reads an image with digital YUV (CCIR 601 4:1:1, plane
%  or partition interlaced, or 4:2:2 plane, partition interlaced or
%  noninterlaced) bytes 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 ReadYUVImage method is:
%
%      Image *ReadYUVImage(const ImageInfo *image_info,ExceptionInfo *exception)
%
%  A description of each parameter follows:
%
%    o image_info: the image info.
%
%    o exception: return any errors or warnings in this structure.
%
*/
static Image *ReadYUVImage(const ImageInfo *image_info,ExceptionInfo *exception)
{
  Image
    *chroma_image,
    *image,
    *resize_image;

  InterlaceType
    interlace;

  MagickBooleanType
    status;

  register const PixelPacket
    *chroma_pixels;

  register ssize_t
    x;

  register PixelPacket
    *q;

  register unsigned char
    *p;

  ssize_t
    count,
    horizontal_factor,
    vertical_factor,
    y;

  size_t
    quantum;

  unsigned char
    *scanline;

  /*
    Allocate image structure.
  */
  assert(image_info != (const ImageInfo *) NULL);
  assert(image_info->signature == MagickSignature);
  if (image_info->debug != MagickFalse)
    (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
      image_info->filename);
  assert(exception != (ExceptionInfo *) NULL);
  assert(exception->signature == MagickSignature);
  image=AcquireImage(image_info);
  if ((image->columns == 0) || (image->rows == 0))
    ThrowReaderException(OptionError,"MustSpecifyImageSize");
  status=SetImageExtent(image,image->columns,image->rows);
  if (status == MagickFalse)
    {
      InheritException(exception,&image->exception);
      return(DestroyImageList(image));
    }
  quantum=(size_t) (image->depth <= 8 ? 1 : 2);
  interlace=image_info->interlace;
  horizontal_factor=2;
  vertical_factor=2;
  if (image_info->sampling_factor != (char *) NULL)
    {
      GeometryInfo
        geometry_info;

      MagickStatusType
        flags;

      flags=ParseGeometry(image_info->sampling_factor,&geometry_info);
      horizontal_factor=(ssize_t) geometry_info.rho;
      vertical_factor=(ssize_t) geometry_info.sigma;
      if ((flags & SigmaValue) == 0)
        vertical_factor=horizontal_factor;
      if ((horizontal_factor != 1) && (horizontal_factor != 2) &&
          (vertical_factor != 1) && (vertical_factor != 2))
        ThrowReaderException(CorruptImageError,"UnexpectedSamplingFactor");
    }
  if ((interlace == UndefinedInterlace) ||
      ((interlace == NoInterlace) && (vertical_factor == 2)))
    {
      interlace=NoInterlace;    /* CCIR 4:2:2 */
      if (vertical_factor == 2)
        interlace=PlaneInterlace; /* CCIR 4:1:1 */
    }
  if (interlace != PartitionInterlace)
    {
      /*
        Open image file.
      */
      status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
      if (status == MagickFalse)
        {
          image=DestroyImageList(image);
          return((Image *) NULL);
        }
      if (DiscardBlobBytes(image,(MagickSizeType) image->offset) == MagickFalse)
        ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
          image->filename);
    }
  /*
    Allocate memory for a scanline.
  */
  if (interlace == NoInterlace)
    scanline=(unsigned char *) AcquireQuantumMemory((size_t) 2UL*
      image->columns+2UL,quantum*sizeof(*scanline));
  else
    scanline=(unsigned char *) AcquireQuantumMemory(image->columns,
      quantum*sizeof(*scanline));
  if (scanline == (unsigned char *) NULL)
    ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
  do
  {
    chroma_image=CloneImage(image,(image->columns + horizontal_factor - 1) /
      horizontal_factor, (image->rows + vertical_factor - 1) / vertical_factor,
      MagickTrue,exception);
    if (chroma_image == (Image *) NULL)
      ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
    /*
      Convert raster image to pixel packets.
    */
    if ((image_info->ping != MagickFalse) && (image_info->number_scenes != 0))
      if (image->scene >= (image_info->scene+image_info->number_scenes-1))
        break;
    status=SetImageExtent(image,image->columns,image->rows);
    if (status == MagickFalse)
      {
        InheritException(exception,&image->exception);
        return(DestroyImageList(image));
      }
    if (interlace == PartitionInterlace)
      {
        AppendImageFormat("Y",image->filename);
        status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
        if (status == MagickFalse)
          {
            image=DestroyImageList(image);
            return((Image *) NULL);
          }
      }
    for (y=0; y < (ssize_t) image->rows; y++)
    {
      register PixelPacket
        *chroma_pixels;

      if (interlace == NoInterlace)
        {
          if ((y > 0) || (GetPreviousImageInList(image) == (Image *) NULL))
            (void) ReadBlob(image,(size_t) (2*quantum*image->columns),scanline);
          p=scanline;
          q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
          if (q == (PixelPacket *) NULL)
            break;
          chroma_pixels=QueueAuthenticPixels(chroma_image,0,y,
            chroma_image->columns,1,exception);
          if (chroma_pixels == (PixelPacket *) NULL)
            break;
          for (x=0; x < (ssize_t) image->columns; x+=2)
          {
            SetPixelRed(chroma_pixels,0);
            if (quantum == 1)
              SetPixelGreen(chroma_pixels,ScaleCharToQuantum(*p++));
            else
              {
                SetPixelGreen(chroma_pixels,ScaleShortToQuantum(((*p) << 8) |
                  *(p+1)));
                p+=2;
              }
            if (quantum == 1)
              SetPixelRed(q,ScaleCharToQuantum(*p++));
            else
              {
                SetPixelRed(q,ScaleShortToQuantum(((*p) << 8) | *(p+1)));
                p+=2;
              }
            SetPixelGreen(q,0);
            SetPixelBlue(q,0);
            q++;
            SetPixelGreen(q,0);
            SetPixelBlue(q,0);
            if (quantum == 1)
              SetPixelBlue(chroma_pixels,ScaleCharToQuantum(*p++));
            else
              {
                SetPixelBlue(chroma_pixels,ScaleShortToQuantum(((*p) << 8) |
                  *(p+1)));
                p+=2;
              }
            if (quantum == 1)
              SetPixelRed(q,ScaleCharToQuantum(*p++));
            else
              {
                SetPixelRed(q,ScaleShortToQuantum(((*p) << 8) | *(p+1)));
                p+=2;
              }
            chroma_pixels++;
            q++;
          }
        }
      else
        {
          if ((y > 0) || (GetPreviousImageInList(image) == (Image *) NULL))
            (void) ReadBlob(image,(size_t) quantum*image->columns,scanline);
          p=scanline;
          q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
          if (q == (PixelPacket *) NULL)
            break;
          for (x=0; x < (ssize_t) image->columns; x++)
          {
            if (quantum == 1)
              SetPixelRed(q,ScaleCharToQuantum(*p++));
            else
              {
                SetPixelRed(q,ScaleShortToQuantum(((*p) << 8) | *(p+1)));
                p+=2;
              }
            SetPixelGreen(q,0);
            SetPixelBlue(q,0);
            q++;
          }
        }
      if (SyncAuthenticPixels(image,exception) == MagickFalse)
        break;
      if (interlace == NoInterlace)
        if (SyncAuthenticPixels(chroma_image,exception) == MagickFalse)
          break;
      if (image->previous == (Image *) NULL)
        {
          status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
            image->rows);
          if (status == MagickFalse)
            break;
        }
    }
    if (interlace == PartitionInterlace)
      {
        (void) CloseBlob(image);
        AppendImageFormat("U",image->filename);
        status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
        if (status == MagickFalse)
          {
            image=DestroyImageList(image);
            return((Image *) NULL);
          }
      }
    if (interlace != NoInterlace)
      {
        for (y=0; y < (ssize_t) chroma_image->rows; y++)
        {
          (void) ReadBlob(image,(size_t) quantum*chroma_image->columns,scanline);
          p=scanline;
          q=QueueAuthenticPixels(chroma_image,0,y,chroma_image->columns,1,
            exception);
          if (q == (PixelPacket *) NULL)
            break;
          for (x=0; x < (ssize_t) chroma_image->columns; x++)
          {
            SetPixelRed(q,0);
            if (quantum == 1)
              SetPixelGreen(q,ScaleCharToQuantum(*p++));
            else
              {
                SetPixelGreen(q,ScaleShortToQuantum(((*p) << 8) | *(p+1)));
                p+=2;
              }
            SetPixelBlue(q,0);
            q++;
          }
          if (SyncAuthenticPixels(chroma_image,exception) == MagickFalse)
            break;
        }
      if (interlace == PartitionInterlace)
        {
          (void) CloseBlob(image);
          AppendImageFormat("V",image->filename);
          status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
          if (status == MagickFalse)
            {
              image=DestroyImageList(image);
              return((Image *) NULL);
            }
        }
      for (y=0; y < (ssize_t) chroma_image->rows; y++)
      {
        (void) ReadBlob(image,(size_t) quantum*chroma_image->columns,scanline);
        p=scanline;
        q=GetAuthenticPixels(chroma_image,0,y,chroma_image->columns,1,
          exception);
        if (q == (PixelPacket *) NULL)
          break;
        for (x=0; x < (ssize_t) chroma_image->columns; x++)
        {
          if (quantum == 1)
            SetPixelBlue(q,ScaleCharToQuantum(*p++));
          else
            {
              SetPixelBlue(q,ScaleShortToQuantum(((*p) << 8) | *(p+1)));
              p+=2;
            }
          q++;
        }
        if (SyncAuthenticPixels(chroma_image,exception) == MagickFalse)
          break;
      }
    }
    /*
      Scale image.
    */
    resize_image=ResizeImage(chroma_image,image->columns,image->rows,
      TriangleFilter,1.0,exception);
    chroma_image=DestroyImage(chroma_image);
    if (resize_image == (Image *) NULL)
      ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
    for (y=0; y < (ssize_t) image->rows; y++)
    {
      q=GetAuthenticPixels(image,0,y,image->columns,1,exception);
      chroma_pixels=GetVirtualPixels(resize_image,0,y,resize_image->columns,1,
        &resize_image->exception);
      if ((q == (PixelPacket *) NULL) ||
          (chroma_pixels == (const PixelPacket *) NULL))
        break;
      for (x=0; x < (ssize_t) image->columns; x++)
      {
        SetPixelGreen(q,GetPixelGreen(chroma_pixels));
        SetPixelBlue(q,GetPixelBlue(chroma_pixels));
        chroma_pixels++;
        q++;
      }
      if (SyncAuthenticPixels(image,exception) == MagickFalse)
        break;
    }
    resize_image=DestroyImage(resize_image);
    SetImageColorspace(image,YCbCrColorspace);
    if (interlace == PartitionInterlace)
      (void) CopyMagickString(image->filename,image_info->filename,
        MaxTextExtent);
    if (EOFBlob(image) != MagickFalse)
      {
        ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
          image->filename);
        break;
      }
    /*
      Proceed to next image.
    */
    if (image_info->number_scenes != 0)
      if (image->scene >= (image_info->scene+image_info->number_scenes-1))
        break;
    if (interlace == NoInterlace)
      count=ReadBlob(image,(size_t) (2*quantum*image->columns),scanline);
    else
      count=ReadBlob(image,(size_t) quantum*image->columns,scanline);
    if (count != 0)
      {
        /*
          Allocate next image structure.
        */
        AcquireNextImage(image_info,image);
        if (GetNextImageInList(image) == (Image *) NULL)
          {
            image=DestroyImageList(image);
            return((Image *) NULL);
          }
        image=SyncNextImageInList(image);
        status=SetImageProgress(image,LoadImagesTag,TellBlob(image),
          GetBlobSize(image));
        if (status == MagickFalse)
          break;
      }
  } while (count != 0);
  scanline=(unsigned char *) RelinquishMagickMemory(scanline);
  (void) CloseBlob(image);
  return(GetFirstImageInList(image));
}
Beispiel #23
0
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   R e a d P I X I m a g e                                                   %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  ReadPIXImage() reads a Alias/Wavefront RLE 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 ReadPIXImage method is:
%
%      Image *ReadPIXImage(const ImageInfo *image_info,ExceptionInfo *exception)
%
%  A description of each parameter follows:
%
%    o image_info: the image info.
%
%    o exception: return any errors or warnings in this structure.
%
%
*/
static Image *ReadPIXImage(const ImageInfo *image_info,ExceptionInfo *exception)
{
  Image
    *image;

  IndexPacket
    index;

  MagickBooleanType
    status;

  Quantum
    blue,
    green,
    red;

  register IndexPacket
    *indexes;

  register ssize_t
    x;

  register PixelPacket
    *q;

  size_t
    bits_per_pixel,
    height,
    length,
    width;

  ssize_t
    y;

  /*
    Open image file.
  */
  assert(image_info != (const ImageInfo *) NULL);
  assert(image_info->signature == MagickSignature);
  if (image_info->debug != MagickFalse)
    (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
      image_info->filename);
  assert(exception != (ExceptionInfo *) NULL);
  assert(exception->signature == MagickSignature);
  image=AcquireImage(image_info);
  status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
  if (status == MagickFalse)
    {
      image=DestroyImageList(image);
      return((Image *) NULL);
    }
  /*
    Read PIX image.
  */
  width=ReadBlobMSBShort(image);
  height=ReadBlobMSBShort(image);
  (void) ReadBlobMSBShort(image);  /* x-offset */
  (void) ReadBlobMSBShort(image);  /* y-offset */
  bits_per_pixel=ReadBlobMSBShort(image);
  if ((width == 0UL) || (height == 0UL) || ((bits_per_pixel != 8) &&
      (bits_per_pixel != 24)))
    ThrowReaderException(CorruptImageError,"ImproperImageHeader");
  do
  {
    /*
      Initialize image structure.
    */
    image->columns=width;
    image->rows=height;
    if (bits_per_pixel == 8)
      if (AcquireImageColormap(image,256) == MagickFalse)
        ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
    if ((image_info->ping != MagickFalse) && (image_info->number_scenes != 0))
      if (image->scene >= (image_info->scene+image_info->number_scenes-1))
        break;
    /*
      Convert PIX raster image to pixel packets.
    */
    red=(Quantum) 0;
    green=(Quantum) 0;
    blue=(Quantum) 0;
    index=(IndexPacket) 0;
    length=0;
    for (y=0; y < (ssize_t) image->rows; y++)
    {
      q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
      if (q == (PixelPacket *) NULL)
        break;
      indexes=GetAuthenticIndexQueue(image);
      for (x=0; x < (ssize_t) image->columns; x++)
      {
        if (length == 0)
          {
            length=(size_t) ReadBlobByte(image);
            if (bits_per_pixel == 8)
              index=ScaleCharToQuantum((unsigned char) ReadBlobByte(image));
            else
              {
                blue=ScaleCharToQuantum((unsigned char) ReadBlobByte(image));
                green=ScaleCharToQuantum((unsigned char) ReadBlobByte(image));
                red=ScaleCharToQuantum((unsigned char) ReadBlobByte(image));
              }
          }
        if (image->storage_class == PseudoClass)
          SetPixelIndex(indexes+x,index);
        SetPixelBlue(q,blue);
        SetPixelGreen(q,green);
        SetPixelRed(q,red);
        length--;
        q++;
      }
      if (SyncAuthenticPixels(image,exception) == MagickFalse)
        break;
      if (image->previous == (Image *) NULL)
        {
          status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
            image->rows);
          if (status == MagickFalse)
            break;
        }
    }
    if (image->storage_class == PseudoClass)
      (void) SyncImage(image);
    if (EOFBlob(image) != MagickFalse)
      {
        ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
          image->filename);
        break;
      }
    /*
      Proceed to next image.
    */
    if (image_info->number_scenes != 0)
      if (image->scene >= (image_info->scene+image_info->number_scenes-1))
        break;
    width=ReadBlobMSBLong(image);
    height=ReadBlobMSBLong(image);
    (void) ReadBlobMSBShort(image);
    (void) ReadBlobMSBShort(image);
    bits_per_pixel=ReadBlobMSBShort(image);
    status=(width != 0UL) && (height == 0UL) && ((bits_per_pixel == 8) ||
      (bits_per_pixel == 24)) ? MagickTrue : MagickFalse;
    if (status == MagickTrue)
      {
        /*
          Allocate next image structure.
        */
        AcquireNextImage(image_info,image);
        if (GetNextImageInList(image) == (Image *) NULL)
          {
            image=DestroyImageList(image);
            return((Image *) NULL);
          }
        image=SyncNextImageInList(image);
        status=SetImageProgress(image,LoadImagesTag,TellBlob(image),
          GetBlobSize(image));
        if (status == MagickFalse)
          break;
      }
  } while (status == MagickTrue);
  (void) CloseBlob(image);
  return(GetFirstImageInList(image));
}
Beispiel #24
0
static Image *ReadEMFImage(const ImageInfo *image_info,
  ExceptionInfo *exception)
{
  Gdiplus::Bitmap
    *bitmap;

  Gdiplus::BitmapData
     bitmap_data;

  Gdiplus::GdiplusStartupInput
    startup_input;

  Gdiplus::Graphics
    *graphics;

  Gdiplus::Image
    *source;

  Gdiplus::Rect
    rect;

  GeometryInfo
    geometry_info;

  Image
    *image;

  MagickStatusType
    flags;

  register Quantum
    *q;

  register ssize_t
    x;

  ssize_t
    y;

  ULONG_PTR
    token;

  unsigned char
    *p;

  wchar_t
    fileName[MagickPathExtent];

  assert(image_info != (const ImageInfo *) NULL);
  assert(image_info->signature == MagickSignature);
  if (image_info->debug != MagickFalse)
    (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
      image_info->filename);
  assert(exception != (ExceptionInfo *) NULL);

  image=AcquireImage(image_info,exception);
  if (Gdiplus::GdiplusStartup(&token,&startup_input,NULL) != 
    Gdiplus::Status::Ok)
    ThrowReaderException(CoderError, "GdiplusStartupFailed");
  MultiByteToWideChar(CP_UTF8,0,image->filename,-1,fileName,MagickPathExtent);
  source=Gdiplus::Image::FromFile(fileName);
  if (source == (Gdiplus::Image *) NULL)
    {
      Gdiplus::GdiplusShutdown(token);
      ThrowReaderException(FileOpenError,"UnableToOpenFile");
    }

  image->resolution.x=source->GetHorizontalResolution();
  image->resolution.y=source->GetVerticalResolution();
  image->columns=(size_t) source->GetWidth();
  image->rows=(size_t) source->GetHeight();
  if (image_info->density != (char *) NULL)
    {
      flags=ParseGeometry(image_info->density,&geometry_info);
      image->resolution.x=geometry_info.rho;
      image->resolution.y=geometry_info.sigma;
      if ((flags & SigmaValue) == 0)
        image->resolution.y=image->resolution.x;
      if ((image->resolution.x > 0.0) && (image->resolution.y > 0.0))
        {
          image->columns=(size_t) floor((Gdiplus::REAL) source->GetWidth() /
            source->GetHorizontalResolution() * image->resolution.x + 0.5);
          image->rows=(size_t)floor((Gdiplus::REAL) source->GetHeight() /
            source->GetVerticalResolution() * image->resolution.y + 0.5);
        }
    }

  bitmap=new Gdiplus::Bitmap((INT) image->columns,(INT) image->rows,
    PixelFormat32bppARGB);
  graphics=Gdiplus::Graphics::FromImage(bitmap);
  graphics->SetInterpolationMode(Gdiplus::InterpolationModeHighQualityBicubic);
  graphics->SetSmoothingMode(Gdiplus::SmoothingModeHighQuality);
  graphics->SetTextRenderingHint(Gdiplus::TextRenderingHintClearTypeGridFit);
  graphics->Clear(Gdiplus::Color((BYTE) ScaleQuantumToChar(
    image->background_color.alpha),(BYTE) ScaleQuantumToChar(
    image->background_color.red),(BYTE) ScaleQuantumToChar(
    image->background_color.green),(BYTE) ScaleQuantumToChar(
    image->background_color.blue)));
  graphics->DrawImage(source,0,0,(INT) image->columns,(INT) image->rows);
  delete graphics;
  delete source;

  rect=Gdiplus::Rect(0,0,(INT) image->columns,(INT) image->rows);
  if (bitmap->LockBits(&rect,Gdiplus::ImageLockModeRead,PixelFormat32bppARGB,
    &bitmap_data) != Gdiplus::Ok)
  {
    delete bitmap;
    Gdiplus::GdiplusShutdown(token);
    ThrowReaderException(FileOpenError,"UnableToReadImageData");
  }

  image->alpha_trait=BlendPixelTrait;
  for (y=0; y < (ssize_t) image->rows; y++)
  {
    p=(unsigned char *) bitmap_data.Scan0+(y*abs(bitmap_data.Stride));
    if (bitmap_data.Stride < 0)
      q=GetAuthenticPixels(image,0,image->rows-y-1,image->columns,1,exception);
    else
      q=GetAuthenticPixels(image,0,y,image->columns,1,exception);
    if (q == (Quantum *) NULL)
      break;

    for (x=0; x < (ssize_t) image->columns; x++)
    {
      SetPixelBlue(image,ScaleCharToQuantum(*p++),q);
      SetPixelGreen(image,ScaleCharToQuantum(*p++),q);
      SetPixelRed(image,ScaleCharToQuantum(*p++),q);
      SetPixelAlpha(image,ScaleCharToQuantum(*p++),q);
      q+=GetPixelChannels(image);
    }

    if (SyncAuthenticPixels(image,exception) == MagickFalse)
      break;
  }

  bitmap->UnlockBits(&bitmap_data);
  delete bitmap;
  Gdiplus::GdiplusShutdown(token);
  return(image);
}
Beispiel #25
0
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   R e a d R L E I m a g e                                                   %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  ReadRLEImage() reads a run-length encoded Utah Raster Toolkit
%  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 ReadRLEImage method is:
%
%      Image *ReadRLEImage(const ImageInfo *image_info,ExceptionInfo *exception)
%
%  A description of each parameter follows:
%
%    o image_info: the image info.
%
%    o exception: return any errors or warnings in this structure.
%
%
*/
static Image *ReadRLEImage(const ImageInfo *image_info,ExceptionInfo *exception)
{
#define SkipLinesOp  0x01
#define SetColorOp  0x02
#define SkipPixelsOp  0x03
#define ByteDataOp  0x05
#define RunDataOp  0x06
#define EOFOp  0x07

  char
    magick[12];

  Image
    *image;

  int
    opcode,
    operand,
    status;

  MagickStatusType
    flags;

  MagickSizeType
    number_pixels;

  MemoryInfo
    *pixel_info;

  register IndexPacket
    *indexes;

  register ssize_t
    x;

  register PixelPacket
    *q;

  register ssize_t
    i;

  register unsigned char
    *p;

  size_t
    bits_per_pixel,
    map_length,
    number_colormaps,
    number_planes,
    one;

  ssize_t
    count,
    y;

  unsigned char
    background_color[256],
    *colormap,
    pixel,
    plane,
    *pixels;

  /*
    Open image file.
  */
  assert(image_info != (const ImageInfo *) NULL);
  assert(image_info->signature == MagickSignature);
  if (image_info->debug != MagickFalse)
    (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
      image_info->filename);
  assert(exception != (ExceptionInfo *) NULL);
  assert(exception->signature == MagickSignature);
  image=AcquireImage(image_info);
  status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
  if (status == MagickFalse)
    {
      image=DestroyImageList(image);
      return((Image *) NULL);
    }
  /*
    Determine if this a RLE file.
  */
  count=ReadBlob(image,2,(unsigned char *) magick);
  if ((count == 0) || (memcmp(magick,"\122\314",2) != 0))
    ThrowReaderException(CorruptImageError,"ImproperImageHeader");
  do
  {
    /*
      Read image header.
    */
    (void) ReadBlobLSBShort(image);
    (void) ReadBlobLSBShort(image);
    image->columns=ReadBlobLSBShort(image);
    image->rows=ReadBlobLSBShort(image);
    flags=(MagickStatusType) ReadBlobByte(image);
    image->matte=flags & 0x04 ? MagickTrue : MagickFalse;
    number_planes=1UL*ReadBlobByte(image);
    bits_per_pixel=1UL*ReadBlobByte(image);
    number_colormaps=1UL*ReadBlobByte(image);
    one=1;
    map_length=one << ReadBlobByte(image);
    if ((number_planes == 0) || (number_planes == 2) || (bits_per_pixel != 8) ||
        (image->columns == 0))
      ThrowReaderException(CorruptImageError,"ImproperImageHeader");
    if (flags & 0x02)
      {
        /*
          No background color-- initialize to black.
        */
        for (i=0; i < (ssize_t) number_planes; i++)
          background_color[i]=0;
        (void) ReadBlobByte(image);
      }
    else
      {
        /*
          Initialize background color.
        */
        p=background_color;
        for (i=0; i < (ssize_t) number_planes; i++)
          *p++=(unsigned char) ReadBlobByte(image);
      }
    if ((number_planes & 0x01) == 0)
      (void) ReadBlobByte(image);
    colormap=(unsigned char *) NULL;
    if (number_colormaps != 0)
      {
        /*
          Read image colormaps.
        */
        colormap=(unsigned char *) AcquireQuantumMemory(number_colormaps,
          map_length*sizeof(*colormap));
        if (colormap == (unsigned char *) NULL)
          ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
        p=colormap;
        for (i=0; i < (ssize_t) number_colormaps; i++)
          for (x=0; x < (ssize_t) map_length; x++)
            *p++=(unsigned char) ScaleShortToQuantum(ReadBlobLSBShort(image));
      }
    if ((flags & 0x08) != 0)
      {
        char
          *comment;

        size_t
          length;

        /*
          Read image comment.
        */
        length=ReadBlobLSBShort(image);
        if (length != 0)
          {
            comment=(char *) AcquireQuantumMemory(length,sizeof(*comment));
            if (comment == (char *) NULL)
              ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
            count=ReadBlob(image,length-1,(unsigned char *) comment);
            comment[length-1]='\0';
            (void) SetImageProperty(image,"comment",comment);
            comment=DestroyString(comment);
            if ((length & 0x01) == 0)
              (void) ReadBlobByte(image);
          }
      }
    if ((image_info->ping != MagickFalse) && (image_info->number_scenes != 0))
      if (image->scene >= (image_info->scene+image_info->number_scenes-1))
        break;
    /*
      Allocate RLE pixels.
    */
    if (image->matte != MagickFalse)
      number_planes++;
    number_pixels=(MagickSizeType) image->columns*image->rows;
    if ((number_pixels*number_planes) != (size_t) (number_pixels*number_planes))
      ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
    pixel_info=AcquireVirtualMemory(image->columns,image->rows*number_planes*
      sizeof(*pixels));
    if (pixel_info == (MemoryInfo *) NULL)
      ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
    pixels=(unsigned char *) GetVirtualMemoryBlob(pixel_info);
    if ((flags & 0x01) && !(flags & 0x02))
      {
        ssize_t
          j;

        /*
          Set background color.
        */
        p=pixels;
        for (i=0; i < (ssize_t) number_pixels; i++)
        {
          if (image->matte == MagickFalse)
            for (j=0; j < (ssize_t) number_planes; j++)
              *p++=background_color[j];
          else
            {
              for (j=0; j < (ssize_t) (number_planes-1); j++)
                *p++=background_color[j];
              *p++=0;  /* initialize matte channel */
            }
        }
      }
    /*
      Read runlength-encoded image.
    */
    plane=0;
    x=0;
    y=0;
    opcode=ReadBlobByte(image);
    do
    {
      switch (opcode & 0x3f)
      {
        case SkipLinesOp:
        {
          operand=ReadBlobByte(image);
          if (opcode & 0x40)
            operand=(int) ReadBlobLSBShort(image);
          x=0;
          y+=operand;
          break;
        }
        case SetColorOp:
        {
          operand=ReadBlobByte(image);
          plane=(unsigned char) operand;
          if (plane == 255)
            plane=(unsigned char) (number_planes-1);
          x=0;
          break;
        }
        case SkipPixelsOp:
        {
          operand=ReadBlobByte(image);
          if (opcode & 0x40)
            operand=(int) ReadBlobLSBShort(image);
          x+=operand;
          break;
        }
        case ByteDataOp:
        {
          operand=ReadBlobByte(image);
          if (opcode & 0x40)
            operand=(int) ReadBlobLSBShort(image);
          p=pixels+((image->rows-y-1)*image->columns*number_planes)+
            x*number_planes+plane;
          operand++;
          for (i=0; i < (ssize_t) operand; i++)
          {
            pixel=(unsigned char) ReadBlobByte(image);
            if ((y < (ssize_t) image->rows) &&
                ((x+i) < (ssize_t) image->columns))
              *p=pixel;
            p+=number_planes;
          }
          if (operand & 0x01)
            (void) ReadBlobByte(image);
          x+=operand;
          break;
        }
        case RunDataOp:
        {
          operand=ReadBlobByte(image);
          if (opcode & 0x40)
            operand=(int) ReadBlobLSBShort(image);
          pixel=(unsigned char) ReadBlobByte(image);
          (void) ReadBlobByte(image);
          operand++;
          p=pixels+((image->rows-y-1)*image->columns*number_planes)+
            x*number_planes+plane;
          for (i=0; i < (ssize_t) operand; i++)
          {
            if ((y < (ssize_t) image->rows) &&
                ((x+i) < (ssize_t) image->columns))
              *p=pixel;
            p+=number_planes;
          }
          x+=operand;
          break;
        }
        default:
          break;
      }
      opcode=ReadBlobByte(image);
    } while (((opcode & 0x3f) != EOFOp) && (opcode != EOF));
    if (number_colormaps != 0)
      {
        MagickStatusType
          mask;

        /*
          Apply colormap affineation to image.
        */
        mask=(MagickStatusType) (map_length-1);
        p=pixels;
        if (number_colormaps == 1)
          for (i=0; i < (ssize_t) number_pixels; i++)
          {
            *p=colormap[*p & mask];
            p++;
          }
        else
          if ((number_planes >= 3) && (number_colormaps >= 3))
            for (i=0; i < (ssize_t) number_pixels; i++)
              for (x=0; x < (ssize_t) number_planes; x++)
              {
                *p=colormap[x*map_length+(*p & mask)];
                p++;
              }
      }
    /*
      Initialize image structure.
    */
    if (number_planes >= 3)
      {
        /*
          Convert raster image to DirectClass pixel packets.
        */
        p=pixels;
        for (y=0; y < (ssize_t) image->rows; y++)
        {
          q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
          if (q == (PixelPacket *) NULL)
            break;
          for (x=0; x < (ssize_t) image->columns; x++)
          {
            SetPixelRed(q,ScaleCharToQuantum(*p++));
            SetPixelGreen(q,ScaleCharToQuantum(*p++));
            SetPixelBlue(q,ScaleCharToQuantum(*p++));
            if (image->matte != MagickFalse)
              SetPixelAlpha(q,ScaleCharToQuantum(*p++));
            q++;
          }
          if (SyncAuthenticPixels(image,exception) == MagickFalse)
            break;
          if (image->previous == (Image *) NULL)
            {
              status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
                image->rows);
              if (status == MagickFalse)
                break;
            }
        }
      }
    else
      {
        /*
          Create colormap.
        */
        if (number_colormaps == 0)
          map_length=256;
        if (AcquireImageColormap(image,map_length) == MagickFalse)
          ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
        p=colormap;
        if (number_colormaps == 1)
          for (i=0; i < (ssize_t) image->colors; i++)
          {
            /*
              Pseudocolor.
            */
            image->colormap[i].red=ScaleCharToQuantum((unsigned char) i);
            image->colormap[i].green=ScaleCharToQuantum((unsigned char) i);
            image->colormap[i].blue=ScaleCharToQuantum((unsigned char) i);
          }
        else
          if (number_colormaps > 1)
            for (i=0; i < (ssize_t) image->colors; i++)
            {
              image->colormap[i].red=ScaleCharToQuantum(*p);
              image->colormap[i].green=ScaleCharToQuantum(*(p+map_length));
              image->colormap[i].blue=ScaleCharToQuantum(*(p+map_length*2));
              p++;
            }
        p=pixels;
        if (image->matte == MagickFalse)
          {
            /*
              Convert raster image to PseudoClass pixel packets.
            */
            for (y=0; y < (ssize_t) image->rows; y++)
            {
              q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
              if (q == (PixelPacket *) NULL)
                break;
              indexes=GetAuthenticIndexQueue(image);
              for (x=0; x < (ssize_t) image->columns; x++)
                SetPixelIndex(indexes+x,*p++);
              if (SyncAuthenticPixels(image,exception) == MagickFalse)
                break;
              if (image->previous == (Image *) NULL)
                {
                  status=SetImageProgress(image,LoadImageTag,(MagickOffsetType)
                    y,image->rows);
                  if (status == MagickFalse)
                    break;
                }
            }
            (void) SyncImage(image);
          }
        else
          {
            /*
              Image has a matte channel-- promote to DirectClass.
            */
            for (y=0; y < (ssize_t) image->rows; y++)
            {
              q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
              if (q == (PixelPacket *) NULL)
                break;
              for (x=0; x < (ssize_t) image->columns; x++)
              {
                SetPixelRed(q,image->colormap[*p++].red);
                SetPixelGreen(q,image->colormap[*p++].green);
                SetPixelBlue(q,image->colormap[*p++].blue);
                SetPixelAlpha(q,ScaleCharToQuantum(*p++));
                q++;
              }
              if (SyncAuthenticPixels(image,exception) == MagickFalse)
                break;
              if (image->previous == (Image *) NULL)
                {
                  status=SetImageProgress(image,LoadImageTag,(MagickOffsetType)
                    y,image->rows);
                  if (status == MagickFalse)
                    break;
                }
            }
            image->colormap=(PixelPacket *) RelinquishMagickMemory(
              image->colormap);
            image->storage_class=DirectClass;
            image->colors=0;
          }
      }
    if (number_colormaps != 0)
      colormap=(unsigned char *) RelinquishMagickMemory(colormap);
    pixel_info=RelinquishVirtualMemory(pixel_info);
    if (EOFBlob(image) != MagickFalse)
      {
        ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
          image->filename);
        break;
      }
    /*
      Proceed to next image.
    */
    if (image_info->number_scenes != 0)
      if (image->scene >= (image_info->scene+image_info->number_scenes-1))
        break;
    (void) ReadBlobByte(image);
    count=ReadBlob(image,2,(unsigned char *) magick);
    if ((count != 0) && (memcmp(magick,"\122\314",2) == 0))
      {
        /*
          Allocate next image structure.
        */
        AcquireNextImage(image_info,image);
        if (GetNextImageInList(image) == (Image *) NULL)
          {
            image=DestroyImageList(image);
            return((Image *) NULL);
          }
        image=SyncNextImageInList(image);
        status=SetImageProgress(image,LoadImagesTag,TellBlob(image),
          GetBlobSize(image));
        if (status == MagickFalse)
          break;
      }
  } while ((count != 0) && (memcmp(magick,"\122\314",2) == 0));
  (void) CloseBlob(image);
  return(GetFirstImageInList(image));
}
Beispiel #26
0
static Image *ReadEMFImage(const ImageInfo *image_info,
  ExceptionInfo *exception)
{
  BITMAPINFO
    DIBinfo;

  HBITMAP
    hBitmap,
    hOldBitmap;

  HDC
    hDC;

  HENHMETAFILE
    hemf;

  Image
    *image;

  long
    height,
    width,
    y;

  RECT
    rect;

  register long
    x;

  register PixelPacket
    *q;

  RGBQUAD
    *pBits,
    *ppBits;

  image=AcquireImage(image_info);
  hemf=ReadEnhMetaFile(image_info->filename,&width,&height);
  if (hemf == (HENHMETAFILE) NULL)
    ThrowReaderException(CorruptImageError,"ImproperImageHeader");
  if ((image->columns == 0) || (image->rows == 0))
    {
      double
        y_resolution,
        x_resolution;

      y_resolution=DefaultResolution;
      x_resolution=DefaultResolution;
      if (image->y_resolution > 0)
        {
          y_resolution=image->y_resolution;
          if (image->units == PixelsPerCentimeterResolution)
            y_resolution*=CENTIMETERS_INCH;
        }
      if (image->x_resolution > 0)
        {
          x_resolution=image->x_resolution;
          if (image->units == PixelsPerCentimeterResolution)
            x_resolution*=CENTIMETERS_INCH;
        }
      image->rows=(unsigned long) ((height/1000.0/CENTIMETERS_INCH)*
        y_resolution+0.5);
      image->columns=(unsigned long) ((width/1000.0/CENTIMETERS_INCH)*
        x_resolution+0.5);
    }
  if (image_info->size != (char *) NULL)
    {
      long
        x;

      image->columns=width;
      image->rows=height;
      x=0;
      y=0;
      (void) GetGeometry(image_info->size,&x,&y,&image->columns,&image->rows);
    }
  if (image_info->page != (char *) NULL)
    {
      char
        *geometry;

      long
        sans;

      register char
        *p;

      MagickStatusType
        flags;

      geometry=GetPageGeometry(image_info->page);
      p=strchr(geometry,'>');
      if (p == (char *) NULL)
        {
          flags=ParseMetaGeometry(geometry,&sans,&sans,&image->columns,
            &image->rows);
          if (image->x_resolution != 0.0)
            image->columns=(unsigned long) ((image->columns*
              image->x_resolution)+0.5);
          if (image->y_resolution != 0.0)
            image->rows=(unsigned long) ((image->rows*image->y_resolution)+0.5);
        }
      else
        {
          *p='\0';
          flags=ParseMetaGeometry(geometry,&sans,&sans,&image->columns,
            &image->rows);
          if (image->x_resolution != 0.0)
            image->columns=(unsigned long) (((image->columns*
              image->x_resolution)/DefaultResolution)+0.5);
          if (image->y_resolution != 0.0)
            image->rows=(unsigned long) (((image->rows*image->y_resolution)/
              DefaultResolution)+0.5);
        }
      geometry=DestroyString(geometry);
    }
  hDC=GetDC(NULL);
  if (hDC == (HDC) NULL)
    {
      DeleteEnhMetaFile(hemf);
      ThrowReaderException(ResourceLimitError,"UnableToCreateADC");
    }
  /*
    Initialize the bitmap header info.
  */
  (void) ResetMagickMemory(&DIBinfo,0,sizeof(BITMAPINFO));
  DIBinfo.bmiHeader.biSize=sizeof(BITMAPINFOHEADER);
  DIBinfo.bmiHeader.biWidth=image->columns;
  DIBinfo.bmiHeader.biHeight=(-1)*image->rows;
  DIBinfo.bmiHeader.biPlanes=1;
  DIBinfo.bmiHeader.biBitCount=32;
  DIBinfo.bmiHeader.biCompression=BI_RGB;
  hBitmap=CreateDIBSection(hDC,&DIBinfo,DIB_RGB_COLORS,(void **) &ppBits,
    NULL,0);
  ReleaseDC(NULL,hDC);
  if (hBitmap == (HBITMAP) NULL)
    {
      DeleteEnhMetaFile(hemf);
      ThrowReaderException(ResourceLimitError,"UnableToCreateBitmap");
    }
  hDC=CreateCompatibleDC(NULL);
  if (hDC == (HDC) NULL)
    {
      DeleteEnhMetaFile(hemf);
      DeleteObject(hBitmap);
      ThrowReaderException(ResourceLimitError,"UnableToCreateADC");
    }
  hOldBitmap=(HBITMAP) SelectObject(hDC,hBitmap);
  if (hOldBitmap == (HBITMAP) NULL)
    {
      DeleteEnhMetaFile(hemf);
      DeleteDC(hDC);
      DeleteObject(hBitmap);
      ThrowReaderException(ResourceLimitError,"UnableToCreateBitmap");
    }
  /*
    Initialize the bitmap to the image background color.
  */
  pBits=ppBits;
  for (y=0; y < (long) image->rows; y++)
  {
    for (x=0; x < (long) image->columns; x++)
    {
      pBits->rgbRed=ScaleQuantumToChar(image->background_color.red);
      pBits->rgbGreen=ScaleQuantumToChar(image->background_color.green);
      pBits->rgbBlue=ScaleQuantumToChar(image->background_color.blue);
      pBits++;
    }
  }
  rect.top=0;
  rect.left=0;
  rect.right=image->columns;
  rect.bottom=image->rows;
  /*
    Convert metafile pixels.
  */
  PlayEnhMetaFile(hDC,hemf,&rect);
  pBits=ppBits;
  for (y=0; y < (long) image->rows; y++)
  {
    q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
    if (q == (PixelPacket *) NULL)
      break;
    for (x=0; x < (long) image->columns; x++)
    {
      q->red=ScaleCharToQuantum(pBits->rgbRed);
      q->green=ScaleCharToQuantum(pBits->rgbGreen);
      q->blue=ScaleCharToQuantum(pBits->rgbBlue);
      q->opacity=OpaqueOpacity;
      pBits++;
      q++;
    }
    if (SyncAuthenticPixels(image,exception) == MagickFalse)
      break;
  }
  DeleteEnhMetaFile(hemf);
  SelectObject(hDC,hOldBitmap);
  DeleteDC(hDC);
  DeleteObject(hBitmap);
  return(GetFirstImageInList(image));
}
Beispiel #27
0
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   R e a d A V S I m a g e                                                   %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  ReadAVSImage() reads an AVS 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 ReadAVSImage method is:
%
%      Image *ReadAVSImage(const ImageInfo *image_info,ExceptionInfo *exception)
%
%  A description of each parameter follows:
%
%    o image_info: the image info.
%
%    o exception: return any errors or warnings in this structure.
%
*/
static Image *ReadAVSImage(const ImageInfo *image_info,ExceptionInfo *exception)
{
  Image
    *image;

  MagickBooleanType
    status;

  register PixelPacket
    *q;

  register ssize_t
    x;

  register unsigned char
    *p;

  size_t
    height,
    length,
    width;

  ssize_t
    count,
    y;

  unsigned char
    *pixels;

  /*
    Open image file.
  */
  assert(image_info != (const ImageInfo *) NULL);
  assert(image_info->signature == MagickSignature);
  if (image_info->debug != MagickFalse)
    (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
      image_info->filename);
  assert(exception != (ExceptionInfo *) NULL);
  assert(exception->signature == MagickSignature);
  image=AcquireImage(image_info);
  status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
  if (status == MagickFalse)
    {
      image=DestroyImageList(image);
      return((Image *) NULL);
    }
  /*
    Read AVS X image.
  */
  width=ReadBlobMSBLong(image);
  height=ReadBlobMSBLong(image);
  if (EOFBlob(image) != MagickFalse)
    ThrowReaderException(CorruptImageError,"ImproperImageHeader");
  if ((width == 0UL) || (height == 0UL))
    ThrowReaderException(CorruptImageError,"ImproperImageHeader");
  do
  {
    /*
      Convert AVS raster image to pixel packets.
    */
    image->columns=width;
    image->rows=height;
    image->depth=8;
    if ((image_info->ping != MagickFalse) && (image_info->number_scenes != 0))
      if (image->scene >= (image_info->scene+image_info->number_scenes-1))
        break;
    pixels=(unsigned char *) AcquireQuantumMemory(image->columns,
      4*sizeof(*pixels));
    if (pixels == (unsigned char *) NULL) 
      ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
    length=(size_t) 4*image->columns;
    for (y=0; y < (ssize_t) image->rows; y++)
    {
      count=ReadBlob(image,length,pixels);
      if ((size_t) count != length)
        ThrowReaderException(CorruptImageError,"UnableToReadImageData");
      p=pixels;
      q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
      if (q == (PixelPacket *) NULL)
        break;
      for (x=0; x < (ssize_t) image->columns; x++)
      {
        SetPixelAlpha(q,ScaleCharToQuantum(*p++));
        SetPixelRed(q,ScaleCharToQuantum(*p++));
        SetPixelGreen(q,ScaleCharToQuantum(*p++));
        SetPixelBlue(q,ScaleCharToQuantum(*p++));
        if (q->opacity != OpaqueOpacity)
          image->matte=MagickTrue;
        q++;
      }
      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 (EOFBlob(image) != MagickFalse)
      {
        ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
          image->filename);
        break;
      }
    /*
      Proceed to next image.
    */
    if (image_info->number_scenes != 0)
      if (image->scene >= (image_info->scene+image_info->number_scenes-1))
        break;
    width=ReadBlobMSBLong(image);
    height=ReadBlobMSBLong(image);
    if ((width != 0UL) && (height != 0UL))
      {
        /*
          Allocate next image structure.
        */
        AcquireNextImage(image_info,image);
        if (GetNextImageInList(image) == (Image *) NULL)
          {
            image=DestroyImageList(image);
            return((Image *) NULL);
          }
        image=SyncNextImageInList(image);
        status=SetImageProgress(image,LoadImagesTag,TellBlob(image),
          GetBlobSize(image));
        if (status == MagickFalse)
          break;
      }
  } while ((width != 0UL) && (height != 0UL));
  (void) CloseBlob(image);
  return(GetFirstImageInList(image));
}
Beispiel #28
0
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   R e a d P C X I m a g e                                                   %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  ReadPCXImage() reads a ZSoft IBM PC Paintbrush 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 ReadPCXImage method is:
%
%      Image *ReadPCXImage(const ImageInfo *image_info,ExceptionInfo *exception)
%
%  A description of each parameter follows:
%
%    o image_info: the image info.
%
%    o exception: return any errors or warnings in this structure.
%
*/
static Image *ReadPCXImage(const ImageInfo *image_info,ExceptionInfo *exception)
{
#define ThrowPCXException(severity,tag) \
  { \
    scanline=(unsigned char *) RelinquishMagickMemory(scanline); \
    pixel_info=RelinquishVirtualMemory(pixel_info); \
    ThrowReaderException(severity,tag); \
  }

  Image
    *image;

  int
    bits,
    id,
    mask;

  MagickBooleanType
    status;

  MagickOffsetType
    offset,
    *page_table;

  MemoryInfo
    *pixel_info;

  PCXInfo
    pcx_info;

  register ssize_t
    x;

  register Quantum
    *q;

  register ssize_t
    i;

  register unsigned char
    *p,
    *r;

  size_t
    one,
    pcx_packets;

  ssize_t
    count,
    y;

  unsigned char
    packet,
    pcx_colormap[768],
    *pixels,
    *scanline;

  /*
    Open image file.
  */
  assert(image_info != (const ImageInfo *) NULL);
  assert(image_info->signature == MagickCoreSignature);
  if (image_info->debug != MagickFalse)
    (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
      image_info->filename);
  assert(exception != (ExceptionInfo *) NULL);
  assert(exception->signature == MagickCoreSignature);
  image=AcquireImage(image_info,exception);
  status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
  if (status == MagickFalse)
    {
      image=DestroyImageList(image);
      return((Image *) NULL);
    }
  /*
    Determine if this a PCX file.
  */
  page_table=(MagickOffsetType *) NULL;
  if (LocaleCompare(image_info->magick,"DCX") == 0)
    {
      size_t
        magic;

      /*
        Read the DCX page table.
      */
      magic=ReadBlobLSBLong(image);
      if (magic != 987654321)
        ThrowReaderException(CorruptImageError,"ImproperImageHeader");
      page_table=(MagickOffsetType *) AcquireQuantumMemory(1024UL,
        sizeof(*page_table));
      if (page_table == (MagickOffsetType *) NULL)
        ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
      for (id=0; id < 1024; id++)
      {
        page_table[id]=(MagickOffsetType) ReadBlobLSBLong(image);
        if (page_table[id] == 0)
          break;
      }
    }
  if (page_table != (MagickOffsetType *) NULL)
    {
      offset=SeekBlob(image,(MagickOffsetType) page_table[0],SEEK_SET);
      if (offset < 0)
        ThrowReaderException(CorruptImageError,"ImproperImageHeader");
    }
  count=ReadBlob(image,1,&pcx_info.identifier);
  for (id=1; id < 1024; id++)
  {
    int
      bits_per_pixel;

    /*
      Verify PCX identifier.
    */
    pcx_info.version=(unsigned char) ReadBlobByte(image);
    if ((count != 1) || (pcx_info.identifier != 0x0a))
      ThrowReaderException(CorruptImageError,"ImproperImageHeader");
    pcx_info.encoding=(unsigned char) ReadBlobByte(image);
    bits_per_pixel=ReadBlobByte(image);
    if (bits_per_pixel == -1)
      ThrowReaderException(CorruptImageError,"ImproperImageHeader");
    pcx_info.bits_per_pixel=(unsigned char) bits_per_pixel;
    pcx_info.left=ReadBlobLSBShort(image);
    pcx_info.top=ReadBlobLSBShort(image);
    pcx_info.right=ReadBlobLSBShort(image);
    pcx_info.bottom=ReadBlobLSBShort(image);
    pcx_info.horizontal_resolution=ReadBlobLSBShort(image);
    pcx_info.vertical_resolution=ReadBlobLSBShort(image);
    /*
      Read PCX raster colormap.
    */
    image->columns=(size_t) MagickAbsoluteValue((ssize_t) pcx_info.right-
      pcx_info.left)+1UL;
    image->rows=(size_t) MagickAbsoluteValue((ssize_t) pcx_info.bottom-
      pcx_info.top)+1UL;
    if ((image->columns == 0) || (image->rows == 0) ||
        ((pcx_info.bits_per_pixel != 1) &&
         (pcx_info.bits_per_pixel != 2) &&
         (pcx_info.bits_per_pixel != 4) &&
         (pcx_info.bits_per_pixel != 8)))
      ThrowReaderException(CorruptImageError,"ImproperImageHeader");
    image->depth=pcx_info.bits_per_pixel;
    image->units=PixelsPerInchResolution;
    image->resolution.x=(double) pcx_info.horizontal_resolution;
    image->resolution.y=(double) pcx_info.vertical_resolution;
    image->colors=16;
    count=ReadBlob(image,3*image->colors,pcx_colormap);
    if (count != (ssize_t) (3*image->colors))
      ThrowReaderException(CorruptImageError,"ImproperImageHeader");
    pcx_info.reserved=(unsigned char) ReadBlobByte(image);
    pcx_info.planes=(unsigned char) ReadBlobByte(image);
    if ((pcx_info.bits_per_pixel*pcx_info.planes) >= 64)
      ThrowReaderException(CorruptImageError,"ImproperImageHeader");
    one=1;
    if ((pcx_info.bits_per_pixel != 8) || (pcx_info.planes == 1))
      if ((pcx_info.version == 3) || (pcx_info.version == 5) ||
          ((pcx_info.bits_per_pixel*pcx_info.planes) == 1))
        image->colors=(size_t) MagickMin(one << (1UL*
          (pcx_info.bits_per_pixel*pcx_info.planes)),256UL);
    if (AcquireImageColormap(image,image->colors,exception) == MagickFalse)
      ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
    if ((pcx_info.bits_per_pixel >= 8) && (pcx_info.planes != 1))
      image->storage_class=DirectClass;
    p=pcx_colormap;
    for (i=0; i < (ssize_t) image->colors; i++)
    {
      image->colormap[i].red=ScaleCharToQuantum(*p++);
      image->colormap[i].green=ScaleCharToQuantum(*p++);
      image->colormap[i].blue=ScaleCharToQuantum(*p++);
    }
    pcx_info.bytes_per_line=ReadBlobLSBShort(image);
    pcx_info.palette_info=ReadBlobLSBShort(image);
    pcx_info.horizontal_screensize=ReadBlobLSBShort(image);
    pcx_info.vertical_screensize=ReadBlobLSBShort(image);
    for (i=0; i < 54; i++)
      (void) ReadBlobByte(image);
    if ((image_info->ping != MagickFalse) && (image_info->number_scenes != 0))
      if (image->scene >= (image_info->scene+image_info->number_scenes-1))
        break;
    status=SetImageExtent(image,image->columns,image->rows,exception);
    if (status == MagickFalse)
      return(DestroyImageList(image));
    /*
      Read image data.
    */
    if (HeapOverflowSanityCheck(image->rows, (size_t) pcx_info.bytes_per_line) != MagickFalse)
      ThrowReaderException(CorruptImageError,"ImproperImageHeader");
    pcx_packets=(size_t) image->rows*pcx_info.bytes_per_line;
    if (HeapOverflowSanityCheck(pcx_packets, (size_t)pcx_info.planes) != MagickFalse)
      ThrowReaderException(CorruptImageError,"ImproperImageHeader");
    pcx_packets=(size_t) pcx_packets*pcx_info.planes;
    if ((size_t) (pcx_info.bits_per_pixel*pcx_info.planes*image->columns) >
        (pcx_packets*8U))
      ThrowReaderException(CorruptImageError,"ImproperImageHeader");
    scanline=(unsigned char *) AcquireQuantumMemory(MagickMax(image->columns,
      pcx_info.bytes_per_line),MagickMax(8,pcx_info.planes)*sizeof(*scanline));
    pixel_info=AcquireVirtualMemory(pcx_packets,2*sizeof(*pixels));
    if ((scanline == (unsigned char *) NULL) ||
        (pixel_info == (MemoryInfo *) NULL))
      {
        if (scanline != (unsigned char *) NULL)
          scanline=(unsigned char *) RelinquishMagickMemory(scanline);
        if (pixel_info != (MemoryInfo *) NULL)
          pixel_info=RelinquishVirtualMemory(pixel_info);
        ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
      }
    pixels=(unsigned char *) GetVirtualMemoryBlob(pixel_info);
    /*
      Uncompress image data.
    */
    p=pixels;
    if (pcx_info.encoding == 0)
      while (pcx_packets != 0)
      {
        packet=(unsigned char) ReadBlobByte(image);
        if (EOFBlob(image) != MagickFalse)
          ThrowPCXException(CorruptImageError,"UnexpectedEndOfFile");
        *p++=packet;
        pcx_packets--;
      }
    else
      while (pcx_packets != 0)
      {
        packet=(unsigned char) ReadBlobByte(image);
        if (EOFBlob(image) != MagickFalse)
          ThrowPCXException(CorruptImageError,"UnexpectedEndOfFile");
        if ((packet & 0xc0) != 0xc0)
          {
            *p++=packet;
            pcx_packets--;
            continue;
          }
        count=(ssize_t) (packet & 0x3f);
        packet=(unsigned char) ReadBlobByte(image);
        if (EOFBlob(image) != MagickFalse)
          ThrowPCXException(CorruptImageError,"UnexpectedEndOfFile");
        for ( ; count != 0; count--)
        {
          *p++=packet;
          pcx_packets--;
          if (pcx_packets == 0)
            break;
        }
      }
    if (image->storage_class == DirectClass)
      image->alpha_trait=pcx_info.planes > 3 ? BlendPixelTrait :
        UndefinedPixelTrait;
    else
      if ((pcx_info.version == 5) ||
          ((pcx_info.bits_per_pixel*pcx_info.planes) == 1))
        {
          /*
            Initialize image colormap.
          */
          if (image->colors > 256)
            ThrowPCXException(CorruptImageError,"ColormapExceeds256Colors");
          if ((pcx_info.bits_per_pixel*pcx_info.planes) == 1)
            {
              /*
                Monochrome colormap.
              */
              image->colormap[0].red=(Quantum) 0;
              image->colormap[0].green=(Quantum) 0;
              image->colormap[0].blue=(Quantum) 0;
              image->colormap[1].red=QuantumRange;
              image->colormap[1].green=QuantumRange;
              image->colormap[1].blue=QuantumRange;
            }
          else
            if (image->colors > 16)
              {
                /*
                  256 color images have their color map at the end of the file.
                */
                pcx_info.colormap_signature=(unsigned char) ReadBlobByte(image);
                count=ReadBlob(image,3*image->colors,pcx_colormap);
                p=pcx_colormap;
                for (i=0; i < (ssize_t) image->colors; i++)
                {
                  image->colormap[i].red=ScaleCharToQuantum(*p++);
                  image->colormap[i].green=ScaleCharToQuantum(*p++);
                  image->colormap[i].blue=ScaleCharToQuantum(*p++);
                }
            }
        }
    /*
      Convert PCX raster image to pixel packets.
    */
    for (y=0; y < (ssize_t) image->rows; y++)
    {
      p=pixels+(y*pcx_info.bytes_per_line*pcx_info.planes);
      q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
      if (q == (Quantum *) NULL)
        break;
      r=scanline;
      if (image->storage_class == DirectClass)
        for (i=0; i < pcx_info.planes; i++)
        {
          r=scanline+i;
          for (x=0; x < (ssize_t) pcx_info.bytes_per_line; x++)
          {
            switch (i)
            {
              case 0:
              {
                *r=(*p++);
                break;
              }
              case 1:
              {
                *r=(*p++);
                break;
              }
              case 2:
              {
                *r=(*p++);
                break;
              }
              case 3:
              default:
              {
                *r=(*p++);
                break;
              }
            }
            r+=pcx_info.planes;
          }
        }
      else
        if (pcx_info.planes > 1)
          {
            for (x=0; x < (ssize_t) image->columns; x++)
              *r++=0;
            for (i=0; i < pcx_info.planes; i++)
            {
              r=scanline;
              for (x=0; x < (ssize_t) pcx_info.bytes_per_line; x++)
              {
                 bits=(*p++);
                 for (mask=0x80; mask != 0; mask>>=1)
                 {
                   if (bits & mask)
                     *r|=1 << i;
                   r++;
                 }
               }
            }
          }
        else
          switch (pcx_info.bits_per_pixel)
          {
            case 1:
            {
              register ssize_t
                bit;

              for (x=0; x < ((ssize_t) image->columns-7); x+=8)
              {
                for (bit=7; bit >= 0; bit--)
                  *r++=(unsigned char) ((*p) & (0x01 << bit) ? 0x01 : 0x00);
                p++;
              }
              if ((image->columns % 8) != 0)
                {
                  for (bit=7; bit >= (ssize_t) (8-(image->columns % 8)); bit--)
                    *r++=(unsigned char) ((*p) & (0x01 << bit) ? 0x01 : 0x00);
                  p++;
                }
              break;
            }
            case 2:
            {
              for (x=0; x < ((ssize_t) image->columns-3); x+=4)
              {
                *r++=(*p >> 6) & 0x3;
                *r++=(*p >> 4) & 0x3;
                *r++=(*p >> 2) & 0x3;
                *r++=(*p) & 0x3;
                p++;
              }
              if ((image->columns % 4) != 0)
                {
                  for (i=3; i >= (ssize_t) (4-(image->columns % 4)); i--)
                    *r++=(unsigned char) ((*p >> (i*2)) & 0x03);
                  p++;
                }
              break;
            }
            case 4:
            {
              for (x=0; x < ((ssize_t) image->columns-1); x+=2)
              {
                *r++=(*p >> 4) & 0xf;
                *r++=(*p) & 0xf;
                p++;
              }
              if ((image->columns % 2) != 0)
                *r++=(*p++ >> 4) & 0xf;
              break;
            }
            case 8:
            {
              (void) CopyMagickMemory(r,p,image->columns);
              break;
            }
            default:
              break;
          }
      /*
        Transfer image scanline.
      */
      r=scanline;
      for (x=0; x < (ssize_t) image->columns; x++)
      {
        if (image->storage_class == PseudoClass)
          SetPixelIndex(image,*r++,q);
        else
          {
            SetPixelRed(image,ScaleCharToQuantum(*r++),q);
            SetPixelGreen(image,ScaleCharToQuantum(*r++),q);
            SetPixelBlue(image,ScaleCharToQuantum(*r++),q);
            if (image->alpha_trait != UndefinedPixelTrait)
              SetPixelAlpha(image,ScaleCharToQuantum(*r++),q);
          }
        q+=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;
        }
    }
    if (image->storage_class == PseudoClass)
      (void) SyncImage(image,exception);
    scanline=(unsigned char *) RelinquishMagickMemory(scanline);
    pixel_info=RelinquishVirtualMemory(pixel_info);
    if (EOFBlob(image) != MagickFalse)
      {
        ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
          image->filename);
        break;
      }
    /*
      Proceed to next image.
    */
    if (image_info->number_scenes != 0)
      if (image->scene >= (image_info->scene+image_info->number_scenes-1))
        break;
    if (page_table == (MagickOffsetType *) NULL)
      break;
    if (page_table[id] == 0)
      break;
    offset=SeekBlob(image,(MagickOffsetType) page_table[id],SEEK_SET);
    if (offset < 0)
      ThrowReaderException(CorruptImageError,"ImproperImageHeader");
    count=ReadBlob(image,1,&pcx_info.identifier);
    if ((count != 0) && (pcx_info.identifier == 0x0a))
      {
        /*
          Allocate next image structure.
        */
        AcquireNextImage(image_info,image,exception);
        if (GetNextImageInList(image) == (Image *) NULL)
          {
            image=DestroyImageList(image);
            return((Image *) NULL);
          }
        image=SyncNextImageInList(image);
        status=SetImageProgress(image,LoadImagesTag,TellBlob(image),
          GetBlobSize(image));
        if (status == MagickFalse)
          break;
      }
  }
Beispiel #29
0
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   H u l l                                                                   %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  Hull() implements the eight hull algorithm described in Applied Optics, Vol
%  24, No. 10, 15 May 1985, "Geometric filter for Speckle Reduction", by Thomas
%  R Crimmins.  Each pixel in the image is replaced by one of its eight of its
%  surrounding pixels using a polarity and negative hull function.
%
%  The format of the Hull method is:
%
%      void Hull(const long x_offset,const long y_offset,
%        const unsigned long columns,const unsigned long rows,Quantum *f,
%        Quantum *g,const int polarity)
%
%  A description of each parameter follows:
%
%    o x_offset, y_offset: An integer value representing the offset of the
%      current pixel within the image.
%
%    o columns, rows: Specifies the number of rows and columns in the image.
%
%    o polarity: An integer value declaring the polarity (+,-).
%
%    o f, g: A pointer to an image pixel and one of it's neighbor.
%
%
*/
MagickExport void Hull(const long x_offset,const long y_offset,
  const unsigned long columns,const unsigned long rows,Quantum *f,Quantum *g,
  const int polarity)
{
  long
    y;

  MagickRealType
    v;

  register long
    x;

  register Quantum
    *p,
    *q,
    *r,
    *s;

  assert(f != (Quantum *) NULL);
  assert(g != (Quantum *) NULL);
  p=f+(columns+2);
  q=g+(columns+2);
  r=p+(y_offset*((long) columns+2)+x_offset);
  for (y=0; y < (long) rows; y++)
  {
    p++;
    q++;
    r++;
    if (polarity > 0)
      for (x=(long) columns; x > 0; x--)
      {
        v=(MagickRealType) (*p);
        if ((MagickRealType) *r >= (v+(MagickRealType) ScaleCharToQuantum(2)))
          v+=ScaleCharToQuantum(1);
        *q=(Quantum) v;
        p++;
        q++;
        r++;
      }
    else
      for (x=(long) columns; x > 0; x--)
      {
        v=(MagickRealType) (*p);
        if ((MagickRealType) *r <= (v-(MagickRealType) ScaleCharToQuantum(2)))
          v-=(long) ScaleCharToQuantum(1);
        *q=(Quantum) v;
        p++;
        q++;
        r++;
      }
    p++;
    q++;
    r++;
  }
  p=f+(columns+2);
  q=g+(columns+2);
  r=q+(y_offset*((long) columns+2)+x_offset);
  s=q-(y_offset*((long) columns+2)+x_offset);
  for (y=0; y < (long) rows; y++)
  {
    p++;
    q++;
    r++;
    s++;
    if (polarity > 0)
      for (x=(long) columns; x > 0; x--)
      {
        v=(MagickRealType) (*q);
        if (((MagickRealType) *s >=
             (v+(MagickRealType) ScaleCharToQuantum(2))) &&
            ((MagickRealType) *r > v))
          v+=ScaleCharToQuantum(1);
        *p=(Quantum) v;
        p++;
        q++;
        r++;
        s++;
      }
    else
      for (x=(long) columns; x > 0; x--)
      {
        v=(MagickRealType) (*q);
        if (((MagickRealType) *s <=
             (v-(MagickRealType) ScaleCharToQuantum(2))) &&
            ((MagickRealType) *r < v))
          v-=(MagickRealType) ScaleCharToQuantum(1);
        *p=(Quantum) v;
        p++;
        q++;
        r++;
        s++;
      }
    p++;
    q++;
    r++;
    s++;
  }
}
Beispiel #30
0
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   R e a d W E B P I m a g e                                                 %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  ReadWEBPImage() reads an image in the WebP image format.
%
%  The format of the ReadWEBPImage method is:
%
%      Image *ReadWEBPImage(const ImageInfo *image_info,
%        ExceptionInfo *exception)
%
%  A description of each parameter follows:
%
%    o image_info: the image info.
%
%    o exception: return any errors or warnings in this structure.
%
*/
static Image *ReadWEBPImage(const ImageInfo *image_info,
                            ExceptionInfo *exception)
{
    int
    height,
    width;

    Image
    *image;

    MagickBooleanType
    status;

    register PixelPacket
    *q;

    register ssize_t
    x;

    register unsigned char
    *p;

    size_t
    length;

    ssize_t
    count,
    y;

    unsigned char
    *stream,
    *pixels;

    /*
      Open image file.
    */
    assert(image_info != (const ImageInfo *) NULL);
    assert(image_info->signature == MagickSignature);
    if (image_info->debug != MagickFalse)
        (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
                              image_info->filename);
    assert(exception != (ExceptionInfo *) NULL);
    assert(exception->signature == MagickSignature);
    image=AcquireImage(image_info);
    status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
    if (status == MagickFalse)
    {
        image=DestroyImageList(image);
        return((Image *) NULL);
    }
    length=(size_t) GetBlobSize(image);
    stream=(unsigned char *) AcquireQuantumMemory(length,sizeof(*stream));
    if (stream == (unsigned char *) NULL)
        ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
    count=ReadBlob(image,length,stream);
    if (count != (ssize_t) length)
        ThrowReaderException(CorruptImageError,"InsufficientImageDataInFile");
    pixels=(unsigned char *) WebPDecodeRGBA(stream,length,&width,&height);
    if (pixels == (unsigned char *) NULL)
        ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
    image->columns=(size_t) width;
    image->rows=(size_t) height;
    p=pixels;
    for (y=0; y < (ssize_t) image->rows; y++)
    {
        q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
        if (q == (PixelPacket *) NULL)
            break;
        for (x=0; x < (ssize_t) image->columns; x++)
        {
            SetRedPixelComponent(q,ScaleCharToQuantum(*p++));
            SetGreenPixelComponent(q,ScaleCharToQuantum(*p++));
            SetBluePixelComponent(q,ScaleCharToQuantum(*p++));
            SetOpacityPixelComponent(q,(QuantumRange-ScaleCharToQuantum(*p++)));
            if (q->opacity != OpaqueOpacity)
                image->matte=MagickTrue;
            q++;
        }
        if (SyncAuthenticPixels(image,exception) == MagickFalse)
            break;
        status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
                                image->rows);
        if (status == MagickFalse)
            break;
    }
    free(pixels);
    pixels=(unsigned char *) NULL;
    return(image);
}