/*

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%                 PPPP   L       AAA   SSSSS  M   M   AAA                     %

%                 P   P  L      A   A  SS     MM MM  A   A                    %

%                 PPPP   L      AAAAA   SSS   M M M  AAAAA                    %

%                 P      L      A   A     SS  M   M  A   A                    %

%                 P      LLLLL  A   A  SSSSS  M   M  A   A                    %

%                                                                             %

%                                                                             %

%                          Read a Plasma Image.                               %

%                                                                             %

%                              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/channel.h"

#include "MagickCore/colorspace-private.h"

#include "MagickCore/constitute.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/random_.h"

#include "MagickCore/random-private.h"

#include "MagickCore/signature-private.h"

#include "MagickCore/quantum-private.h"

#include "MagickCore/static.h"

#include "MagickCore/string_.h"

#include "MagickCore/visual-effects.h"

/*

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%                                                                             %

%                                                                             %

%   R e a d P L A S M A I m a g e                                             %

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%

%  ReadPlasmaImage creates a plasma fractal image.  The image is

%  initialized to the X server color as specified by the filename.

%

%  The format of the ReadPlasmaImage method is:

%

%      Image *ReadPlasmaImage(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 inline MagickBooleanType PlasmaPixel(Image *image,

  RandomInfo *magick_restrict random_info,const double x,const double y,

  ExceptionInfo *exception)

{

  Quantum

    *q;

  q=GetAuthenticPixels(image,(ssize_t) (x+0.5),(ssize_t) (y+0.5),1,1,

    exception);

  if (q == (Quantum *) NULL)

    return(MagickFalse);

  SetPixelRed(image,(Quantum) ((double) QuantumRange*GetPseudoRandomValue(random_info)+

    0.5),q);

  SetPixelGreen(image,(Quantum) ((double) QuantumRange*GetPseudoRandomValue(random_info)+

    0.5),q);

  SetPixelBlue(image,(Quantum) ((double) QuantumRange*GetPseudoRandomValue(random_info)+

    0.5),q);

  return(SyncAuthenticPixels(image,exception));

}

static Image *ReadPlasmaImage(const ImageInfo *image_info,

  ExceptionInfo *exception)

{

  Image

    *image;

  ImageInfo

    *read_info;

  MagickStatusType

    status;

  ssize_t

    x;

  Quantum

    *q;

  size_t

    i;

  SegmentInfo

    segment_info;

  size_t

    depth,

    max_depth;

  ssize_t

    y;

  /*

    Recursively apply plasma to the image.

  */

  read_info=CloneImageInfo(image_info);

  SetImageInfoBlob(read_info,(void *) NULL,0);

  (void) FormatLocaleString(read_info->filename,MagickPathExtent,

    "gradient:%s",image_info->filename);

  image=ReadImage(read_info,exception);

  read_info=DestroyImageInfo(read_info);

  if (image == (Image *) NULL)

    return((Image *) NULL);

  (void) SetImageStorageClass(image,DirectClass,exception);

  if (IsGrayColorspace(image->colorspace) != MagickFalse)

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

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

  {

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

    if (q == (Quantum *) NULL)

      break;

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

    {

      SetPixelAlpha(image,QuantumRange/2,q);

      q+=(ptrdiff_t) GetPixelChannels(image);

    }

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

      break;

  }

  segment_info.x1=0;

  segment_info.y1=0;

  segment_info.x2=(double) image->columns-1;

  segment_info.y2=(double) image->rows-1;

  if (LocaleCompare(image_info->filename,"fractal") == 0)

    {

      RandomInfo

        *random_info;

      /*

        Seed pixels before recursion.

      */

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

      random_info=AcquireRandomInfo();

      status=PlasmaPixel(image,random_info,segment_info.x1,segment_info.y1,

        exception);

      status&=(MagickStatusType) PlasmaPixel(image,random_info,segment_info.x1,

        (segment_info.y1+segment_info.y2)/2,exception);

      status&=(MagickStatusType) PlasmaPixel(image,random_info,segment_info.x1,

        segment_info.y2,exception);

      status&=(MagickStatusType) PlasmaPixel(image,random_info,(segment_info.x1+        segment_info.x2)/2,segment_info.y1,exception);

      status&=(MagickStatusType) PlasmaPixel(image,random_info,(segment_info.x1+

        segment_info.x2)/2,(segment_info.y1+segment_info.y2)/2,exception);

      status&=(MagickStatusType) PlasmaPixel(image,random_info,(segment_info.x1+

        segment_info.x2)/2,segment_info.y2,exception);

      status&=(MagickStatusType) PlasmaPixel(image,random_info,segment_info.x2,

        segment_info.y1,exception);

      status&=(MagickStatusType) PlasmaPixel(image,random_info,segment_info.x2,

        (segment_info.y1+segment_info.y2)/2,exception);

      status&=(MagickStatusType) PlasmaPixel(image,random_info,segment_info.x2,

        segment_info.y2,exception);

      random_info=DestroyRandomInfo(random_info);

      if (status == MagickFalse)

        return(image);  

    }

  i=(size_t) MagickMax(image->columns,image->rows)/2;

  for (max_depth=0; i != 0; max_depth++)

    i>>=1;

  for (depth=1; ; depth++)

  {

    if (PlasmaImage(image,&segment_info,0,depth,exception) != MagickFalse)

      break;

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

      max_depth);

    if (status == MagickFalse)

      break;

  }

  return(GetFirstImageInList(image));

}

/*

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%                                                                             %

%                                                                             %

%   R e g i s t e r P L A S M A I m a g e                                     %

%                                                                             %

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

%

%  RegisterPLASMAImage() adds attributes for the Plasma 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 RegisterPLASMAImage method is:

%

%      size_t RegisterPLASMAImage(void)

%

*/

ModuleExport size_t RegisterPLASMAImage(void)

{

  MagickInfo

    *entry;

  entry=AcquireMagickInfo("PLASMA","PLASMA","Plasma fractal image");

  entry->decoder=(DecodeImageHandler *) ReadPlasmaImage;

  entry->flags^=CoderAdjoinFlag;

  entry->format_type=ImplicitFormatType;

  (void) RegisterMagickInfo(entry);

  entry=AcquireMagickInfo("PLASMA","FRACTAL","Plasma fractal image");

  entry->decoder=(DecodeImageHandler *) ReadPlasmaImage;

  entry->flags^=CoderAdjoinFlag;

  entry->format_type=ImplicitFormatType;

  (void) RegisterMagickInfo(entry);

  return(MagickImageCoderSignature);

}

/*

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%                                                                             %

%                                                                             %

%                                                                             %

%   U n r e g i s t e r P L A S M A I m a g e                                 %

%                                                                             %

%                                                                             %

%                                                                             %

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

%

%  UnregisterPLASMAImage() removes format registrations made by the

%  PLASMA module from the list of supported formats.

%

%  The format of the UnregisterPLASMAImage method is:

%

%      UnregisterPLASMAImage(void)

%

*/

ModuleExport void UnregisterPLASMAImage(void)

{

  (void) UnregisterMagickInfo("FRACTAL");

  (void) UnregisterMagickInfo("PLASMA");

}