text: /*
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  %                                                                             %
  %                                                                             %
  %                                                                             %
  %                            EEEEE  X   X  RRRR                               %
  %                            E       X X   R   R                              %
  %                            EEE      X    RRRR                               %
  %                            E       X X   R R                                %
  %                            EEEEE  X   X  R  R                               %
  %                                                                             %
  %                                                                             %
  %            Read/Write High Dynamic-Range (HDR) Image File Format            %
  %                                                                             %
  %                              Software Design                                %
  %                                John Cristy                                  %
  %                                 April 2007                                  %
  %                                                                             %
  %                                                                             %
  %  Copyright 1999-2013 ImageMagick Studio LLC, a non-profit organization      %
  %  dedicated to making software imaging solutions freely available.           %
  %                                                                             %
  %  You may not use this file except in compliance with the License.  You may  %
  %  obtain a copy of the License at                                            %
  %                                                                             %
  %    http://www.imagemagick.org/script/license.php                            %
  %                                                                             %
  %  Unless required by applicable law or agreed to in writing, software        %
  %  distributed under the License is distributed on an "AS IS" BASIS,          %
  %  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.   %
  %  See the License for the specific language governing permissions and        %
  %  limitations under the License.                                             %
  %                                                                             %
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  %
  %
  */
  
  /*
    Include declarations.
  */
  #include "magick/studio.h"
  #include "magick/blob.h"
  #include "magick/blob-private.h"
  #include "magick/cache.h"
  #include "magick/exception.h"
  #include "magick/exception-private.h"
  #include "magick/image.h"
  #include "magick/image-private.h"
  #include "magick/list.h"
  #include "magick/magick.h"
  #include "magick/memory_.h"
  #include "magick/pixel-accessor.h"
  #include "magick/property.h"
  #include "magick/quantum-private.h"
  #include "magick/static.h"
  #include "magick/string_.h"
  #include "magick/module.h"
  #include "magick/resource_.h"
  #include "magick/utility.h"
  #if defined(MAGICKCORE_OPENEXR_DELEGATE)
  #include <ImfCRgbaFile.h>
  
  /*
    Forward declarations.
  */
  static MagickBooleanType
    WriteEXRImage(const ImageInfo *,Image *);
  #endif
  
  /*
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  %                                                                             %
  %                                                                             %
  %                                                                             %
  %   I s E X R                                                                 %
  %                                                                             %
  %                                                                             %
  %                                                                             %
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  %
  %  IsEXR() returns MagickTrue if the image format type, identified by the
  %  magick string, is EXR.
  %
  %  The format of the IsEXR method is:
  %
  %      MagickBooleanType IsEXR(const unsigned char *magick,const size_t length)
  %
  %  A description of each parameter follows:
  %
  %    o magick: compare image format pattern against these bytes.
  %
  %    o length: Specifies the length of the magick string.
  %
  */
  static MagickBooleanType IsEXR(const unsigned char *magick,const size_t length)
  {
    if (length < 4)
      return(MagickFalse);
    if (memcmp(magick,"\166\057\061\001",4) == 0)
      return(MagickTrue);
    return(MagickFalse);
  }
  
  #if defined(MAGICKCORE_OPENEXR_DELEGATE)
  /*
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  %                                                                             %
  %                                                                             %
  %                                                                             %
  %   R e a d E X R I m a g e                                                   %
  %                                                                             %
  %                                                                             %
  %                                                                             %
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  %
  %  ReadEXRImage reads an image in the high dynamic-range (HDR) file format
  %  developed by Industrial Light & Magic.  It allocates the memory necessary
  %  for the new Image structure and returns a pointer to the new image.
  %
  %  The format of the ReadEXRImage method is:
  %
  %      Image *ReadEXRImage(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 *ReadEXRImage(const ImageInfo *image_info,ExceptionInfo *exception)
  {
    const ImfHeader
      *hdr_info;
  
    Image
      *image;
  
    ImageInfo
      *read_info;
  
    ImfInputFile
      *file;
  
    ImfRgba
      *scanline;
  
    int
      max_x,
      max_y,
      min_x,
      min_y;
  
    MagickBooleanType
      status;
  
    register ssize_t
      x;
  
    register PixelPacket
      *q;
  
    ssize_t
      y;
  
    /*
      Open image.
    */
    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_info=CloneImageInfo(image_info);
    if (IsPathAccessible(read_info->filename) == MagickFalse)
      {
        (void) AcquireUniqueFilename(read_info->filename);
        (void) ImageToFile(image,read_info->filename,exception);
      }
    file=ImfOpenInputFile(read_info->filename);
    if (file == (ImfInputFile *) NULL)
      {
        ThrowFileException(exception,BlobError,"UnableToOpenBlob",
          ImfErrorMessage());
        read_info=DestroyImageInfo(read_info);
        return((Image *) NULL);
      }
    hdr_info=ImfInputHeader(file);
    ImfHeaderDisplayWindow(hdr_info,&min_x,&min_y,&max_x,&max_y);
    image->columns=max_x-min_x+1UL;
    image->rows=max_y-min_y+1UL;
    image->matte=MagickTrue;
    SetImageColorspace(image,RGBColorspace);
    if (image_info->ping != MagickFalse)
      {
        (void) ImfCloseInputFile(file);
        if (LocaleCompare(image_info->filename,read_info->filename) != 0)
          (void) RelinquishUniqueFileResource(read_info->filename);
        read_info=DestroyImageInfo(read_info);
        (void) CloseBlob(image);
        return(GetFirstImageInList(image));
      }
    scanline=(ImfRgba *) AcquireQuantumMemory(image->columns,sizeof(*scanline));
    if (scanline == (ImfRgba *) NULL)
      {
        (void) ImfCloseInputFile(file);
        ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
      }
    for (y=0; y < (ssize_t) image->rows; y++)
    {
      q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
      if (q == (PixelPacket *) NULL)
        break;
      ResetMagickMemory(scanline,0,image->columns*sizeof(*scanline));
      ImfInputSetFrameBuffer(file,scanline-min_x-image->columns*(min_y+y),1,
        image->columns);
      ImfInputReadPixels(file,min_y+y,min_y+y);
      for (x=0; x < (ssize_t) image->columns; x++)
      {
        SetPixelRed(q,ClampToQuantum((MagickRealType) QuantumRange*
          ImfHalfToFloat(scanline[x].r)));
        SetPixelGreen(q,ClampToQuantum((MagickRealType) QuantumRange*
          ImfHalfToFloat(scanline[x].g)));
        SetPixelBlue(q,ClampToQuantum((MagickRealType) QuantumRange*
          ImfHalfToFloat(scanline[x].b)));
        SetPixelAlpha(q,ClampToQuantum((MagickRealType) QuantumRange*
          ImfHalfToFloat(scanline[x].a)));
        q++;
      }
      if (SyncAuthenticPixels(image,exception) == MagickFalse)
        break;
    }
    scanline=(ImfRgba *) RelinquishMagickMemory(scanline);
    (void) ImfCloseInputFile(file);
    if (LocaleCompare(image_info->filename,read_info->filename) != 0)
      (void) RelinquishUniqueFileResource(read_info->filename);
    read_info=DestroyImageInfo(read_info);
    (void) CloseBlob(image);
    return(GetFirstImageInList(image));
  }
  #endif
  
  /*
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  %                                                                             %
  %                                                                             %
  %                                                                             %
  %   R e g i s t e r E X R I m a g e                                           %
  %                                                                             %
  %                                                                             %
  %                                                                             %
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  %
  %  RegisterEXRImage() adds properties for the EXR image format
  %  to the list of supported formats.  The properties include the image format
  %  tag, a method to read and/or write the format, whether the format
  %  supports the saving of more than one frame to the same file or blob,
  %  whether the format supports native in-memory I/O, and a brief
  %  description of the format.
  %
  %  The format of the RegisterEXRImage method is:
  %
  %      size_t RegisterEXRImage(void)
  %
  */
  ModuleExport size_t RegisterEXRImage(void)
  {
    MagickInfo
      *entry;
  
    entry=SetMagickInfo("EXR");
  #if defined(MAGICKCORE_OPENEXR_DELEGATE)
    entry->decoder=(DecodeImageHandler *) ReadEXRImage;
    entry->encoder=(EncodeImageHandler *) WriteEXRImage;
  #endif
    entry->magick=(IsImageFormatHandler *) IsEXR;
    entry->adjoin=MagickFalse;
    entry->description=ConstantString("High Dynamic-range (HDR)");
    entry->blob_support=MagickFalse;
    entry->module=ConstantString("EXR");
    (void) RegisterMagickInfo(entry);
    return(MagickImageCoderSignature);
  }
  
  /*
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  %                                                                             %
  %                                                                             %
  %                                                                             %
  %   U n r e g i s t e r E X R I m a g e                                       %
  %                                                                             %
  %                                                                             %
  %                                                                             %
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  %
  %  UnregisterEXRImage() removes format registrations made by the
  %  EXR module from the list of supported formats.
  %
  %  The format of the UnregisterEXRImage method is:
  %
  %      UnregisterEXRImage(void)
  %
  */
  ModuleExport void UnregisterEXRImage(void)
  {
    (void) UnregisterMagickInfo("EXR");
  }
  
  #if defined(MAGICKCORE_OPENEXR_DELEGATE)
  /*
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  %                                                                             %
  %                                                                             %
  %                                                                             %
  %   W r i t e E X R I m a g e                                                 %
  %                                                                             %
  %                                                                             %
  %                                                                             %
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  %
  %  WriteEXRImage() writes an image to a file the in the high dynamic-range
  %  (HDR) file format developed by Industrial Light & Magic.
  %
  %  The format of the WriteEXRImage method is:
  %
  %      MagickBooleanType WriteEXRImage(const ImageInfo *image_info,Image *image)
  %
  %  A description of each parameter follows.
  %
  %    o image_info: the image info.
  %
  %    o image:  The image.
  %
  */
  static MagickBooleanType WriteEXRImage(const ImageInfo *image_info,Image *image)
  {
    ImageInfo
      *write_info;
  
    ImfHalf
      half_quantum;
  
    ImfHeader
      *hdr_info;
  
    ImfOutputFile
      *file;
  
    ImfRgba
      *scanline;
  
    int
      compression;
  
    MagickBooleanType
      status;
  
    register const PixelPacket
      *p;
  
    register ssize_t
      x;
  
    ssize_t
      y;
  
    /*
      Open output image file.
    */
    assert(image_info != (const ImageInfo *) NULL);
    assert(image_info->signature == MagickSignature);
    assert(image != (Image *) NULL);
    assert(image->signature == MagickSignature);
    if (image->debug != MagickFalse)
      (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
    status=OpenBlob(image_info,image,WriteBinaryBlobMode,&image->exception);
    if (status == MagickFalse)
      return(status);
    (void) SetImageColorspace(image,RGBColorspace);
    write_info=CloneImageInfo(image_info);
    (void) AcquireUniqueFilename(write_info->filename);
    hdr_info=ImfNewHeader();
    ImfHeaderSetDataWindow(hdr_info,0,0,(int) image->columns-1,(int)
      image->rows-1);
    ImfHeaderSetDisplayWindow(hdr_info,0,0,(int) image->columns-1,(int)
      image->rows-1);
    compression=IMF_NO_COMPRESSION;
    if (write_info->compression == ZipSCompression)
      compression=IMF_ZIPS_COMPRESSION;
    if (write_info->compression == ZipCompression)
      compression=IMF_ZIP_COMPRESSION;
    if (write_info->compression == PizCompression)
      compression=IMF_PIZ_COMPRESSION;
    if (write_info->compression == Pxr24Compression)
      compression=IMF_PXR24_COMPRESSION;
  #if defined(B44Compression)
    if (write_info->compression == B44Compression)
      compression=IMF_B44_COMPRESSION;
  #endif
  #if defined(B44ACompression)
    if (write_info->compression == B44ACompression)
      compression=IMF_B44A_COMPRESSION;
  #endif
    ImfHeaderSetCompression(hdr_info,compression);
    ImfHeaderSetLineOrder(hdr_info,IMF_INCREASING_Y);
    file=ImfOpenOutputFile(write_info->filename,hdr_info,IMF_WRITE_RGBA);
    ImfDeleteHeader(hdr_info);
    if (file == (ImfOutputFile *) NULL)
      {
        ThrowFileException(&image->exception,BlobError,"UnableToOpenBlob",
          ImfErrorMessage());
        write_info=DestroyImageInfo(write_info);
        return(MagickFalse);
      }
    scanline=(ImfRgba *) AcquireQuantumMemory(image->columns,sizeof(*scanline));
    if (scanline == (ImfRgba *) NULL)
      {
        (void) ImfCloseOutputFile(file);
        ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
      }
    ResetMagickMemory(scanline,0,image->columns*sizeof(*scanline));
    for (y=0; y < (ssize_t) image->rows; y++)
    {
      p=GetVirtualPixels(image,0,y,image->columns,1,&image->exception);
      if (p == (const PixelPacket *) NULL)
        break;
      for (x=0; x < (ssize_t) image->columns; x++)
      {
        ImfFloatToHalf(QuantumScale*GetPixelRed(p),&half_quantum);
        scanline[x].r=half_quantum;
        ImfFloatToHalf(QuantumScale*GetPixelGreen(p),&half_quantum);
        scanline[x].g=half_quantum;
        ImfFloatToHalf(QuantumScale*GetPixelBlue(p),&half_quantum);
        scanline[x].b=half_quantum;
        if (image->matte == MagickFalse)
          ImfFloatToHalf(1.0,&half_quantum);
        else
          ImfFloatToHalf(1.0-QuantumScale*GetPixelOpacity(p),
            &half_quantum);
        scanline[x].a=half_quantum;
        p++;
      }
      ImfOutputSetFrameBuffer(file,scanline-(y*image->columns),1,image->columns);
      ImfOutputWritePixels(file,1);
    }
    (void) ImfCloseOutputFile(file);
    scanline=(ImfRgba *) RelinquishMagickMemory(scanline);
    (void) FileToImage(image,write_info->filename);
    (void) RelinquishUniqueFileResource(write_info->filename);
    write_info=DestroyImageInfo(write_info);
    (void) CloseBlob(image);
    return(MagickTrue);
  }
  #endif
  