/*

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%                        H   H   AAA   L      DDDD                            %

%                        H   H  A   A  L      D   D                           %

%                        HHHHH  AAAAA  L      D   D                           %

%                        H   H  A   A  L      D   D                           %

%                        H   H  A   A  LLLLL  DDDD                            %

%                                                                             %

%                                                                             %

%                   Create Identity Hald CLUT Image Format                    %

%                                                                             %

%                              Software Design                                %

%                                   Cristy                                    %

%                                 July 1992                                   %

%                                                                             %

%                                                                             %

%  Copyright @ 1999 ImageMagick Studio LLC, a non-profit organization         %

%  dedicated to making software imaging solutions freely available.           %

%                                                                             %

%  You may not use this file except in compliance with the License.  You may  %

%  obtain a copy of the License at                                            %

%                                                                             %

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

%                                                                             %

%  Unless required by applicable law or agreed to in writing, software        %

%  distributed under the License is distributed on an "AS IS" BASIS,          %

%  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.   %

%  See the License for the specific language governing permissions and        %

%  limitations under the License.                                             %

%                                                                             %

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

%

%

*/

/*

  Include declarations.

*/

#include "MagickCore/studio.h"

#include "MagickCore/blob.h"

#include "MagickCore/blob-private.h"

#include "MagickCore/cache.h"

#include "MagickCore/colormap.h"

#include "MagickCore/colorspace.h"

#include "MagickCore/exception.h"

#include "MagickCore/exception-private.h"

#include "MagickCore/image.h"

#include "MagickCore/image-private.h"

#include "MagickCore/list.h"

#include "MagickCore/magick.h"

#include "MagickCore/memory_.h"

#include "MagickCore/module.h"

#include "MagickCore/monitor.h"

#include "MagickCore/monitor-private.h"

#include "MagickCore/pixel-accessor.h"

#include "MagickCore/quantum-private.h"

#include "MagickCore/resource_.h"

#include "MagickCore/static.h"

#include "MagickCore/string_.h"

#include "MagickCore/string-private.h"

#include "MagickCore/thread-private.h"

/*

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

%                                                                             %

%                                                                             %

%                                                                             %

%   R e a d H A L D I m a g e                                                 %

%                                                                             %

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%

%  ReadHALDImage() creates a Hald color lookup table image 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 ReadHALDImage method is:

%

%      Image *ReadHALDImage(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 *ReadHALDImage(const ImageInfo *image_info,

  ExceptionInfo *exception)

{

  Image

    *image;

  MagickBooleanType

    status;

  size_t

    cube_size,

    level;

  ssize_t

    i,

    index,

    y;

  /*

    Create HALD color lookup table image.

  */

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

  assert(image_info->signature == MagickCoreSignature);

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

  assert(exception->signature == MagickCoreSignature);

  if (IsEventLogging() != MagickFalse)

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

      image_info->filename);

  image=AcquireImage(image_info,exception);

  level=0;

  if (*image_info->filename != '\0')

    level=StringToUnsignedLong(image_info->filename);

  if (image_info->scene != 0)

    level=image_info->scene;

  if ((level < 2) || (level > 256))

    level=8;

  status=MagickTrue;

  cube_size=level*level;

  image->columns=(size_t) (level*cube_size);

  image->rows=(size_t) (level*cube_size);

  if (((MagickSizeType) image->columns*image->rows) <= MaxColormapSize)

    (void) AcquireImageColormap(image,(size_t) (image->columns*image->rows),

      exception);

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

  if (status == MagickFalse)

    return(DestroyImageList(image));

  index=0;

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

  {

    Quantum

      *magick_restrict q;

    ssize_t

      blue,

      green,

      red;

    if (status == MagickFalse)

      continue;

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

    if (q == (Quantum *) NULL)

      {

        status=MagickFalse;

        continue;

      }

    blue=y/(ssize_t) level;

    for (green=0; green < (ssize_t) cube_size; green++)

    {

      for (red=0; red < (ssize_t) cube_size; red++)

      {

        SetPixelRed(image,ClampToQuantum((double) QuantumRange*red/

          (cube_size-1.0)),q);

        SetPixelGreen(image,ClampToQuantum((double) QuantumRange*green/

          (cube_size-1.0)),q);

        SetPixelBlue(image,ClampToQuantum((double) QuantumRange*blue/

          (cube_size-1.0)),q);

        SetPixelAlpha(image,OpaqueAlpha,q);

        if (image->storage_class == PseudoClass)

          {

            image->colormap[index].red=

              ClampToQuantum((double) QuantumRange*red/(cube_size-1.0));

            image->colormap[index].green=

              ClampToQuantum((double) QuantumRange*green/(cube_size-1.0));

            image->colormap[index].blue=

              ClampToQuantum((double) QuantumRange*blue/(cube_size-1.0));

            image->colormap[index].alpha=OpaqueAlpha;

            SetPixelIndex(image,(Quantum) index++,q);

          }

        q+=(ptrdiff_t) GetPixelChannels(image);

      }

    }

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

      status=MagickFalse;

  }

  if (CloseBlob(image) == MagickFalse)

    status=MagickFalse;

  if (status == MagickFalse)

    return(DestroyImageList(image));

  if (image_info->scene != 0)

    for (i=0; i < (ssize_t) image_info->scene; i++)

      AppendImageToList(&image,CloneImage(image,0,0,MagickTrue,exception));

  return(GetFirstImageInList(image));

}

/*

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%   R e g i s t e r H A L D I m a g e                                         %

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%                                                                             %

%                                                                             %

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

%

%  RegisterHALDImage() adds attributes for the Hald color lookup table image

%  format to the list of supported formats.  The attributes include the image

%  format tag, a method to read and/or write the format, whether the format

%  supports the saving of more than one frame to the same file or blob, whether

%  the format supports native in-memory I/O, and a brief description of the

%  format.

%

%  The format of the RegisterHALDImage method is:

%

%      size_t RegisterHALDImage(void)

%

*/

ModuleExport size_t RegisterHALDImage(void)

{

  MagickInfo

    *entry;

  entry=AcquireMagickInfo("HALD","HALD",

    "Identity Hald color lookup table image");

  entry->decoder=(DecodeImageHandler *) ReadHALDImage;

  entry->flags^=CoderAdjoinFlag;

  entry->format_type=ImplicitFormatType;

  entry->flags|=CoderRawSupportFlag;

  entry->flags|=CoderEndianSupportFlag;

  (void) RegisterMagickInfo(entry);

  return(MagickImageCoderSignature);

}

/*

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%                                                                             %

%                                                                             %

%                                                                             %

%   U n r e g i s t e r H A L D I m a g e                                     %

%                                                                             %

%                                                                             %

%                                                                             %

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

%

%  UnregisterHALDImage() removes format registrations made by the

%  HALD module from the list of supported formats.

%

%  The format of the UnregisterHALDImage method is:

%

%      UnregisterHALDImage(void)

%

*/

ModuleExport void UnregisterHALDImage(void)

{

  (void) UnregisterMagickInfo("HALD");

}