coders/plasma.c - platform/external/ImageMagick - Gitiles

 /*
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %                                                                             %
 %                                                                             %
 %                                                                             %
 %                 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 1999-2015 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 "MagickCore/studio.h"
 #include "MagickCore/blob.h"
 #include "MagickCore/blob-private.h"
 #include "MagickCore/cache.h"
 #include "MagickCore/channel.h"
 #include "MagickCore/constitute.h"
 #include "MagickCore/exception.h"
 #include "MagickCore/exception-private.h"
 #include "MagickCore/fx.h"
 #include "MagickCore/image.h"
 #include "MagickCore/image-private.h"
 #include "MagickCore/list.h"
 #include "MagickCore/magick.h"
 #include "MagickCore/memory_.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/module.h"

 /*
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %                                                                             %
 %                                                                             %
 %                                                                             %
 %   R e a d P L A S M A I m a g e                                             %
 %                                                                             %
 %                                                                             %
 %                                                                             %
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %
 %  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 void PlasmaPixel(Image *image,RandomInfo *random_info,double x,
   double y,ExceptionInfo *exception)
 {
   register Quantum
     *q;

   q=GetAuthenticPixels(image,(ssize_t) ceil(x-0.5),(ssize_t) ceil(y-0.5),1,1,
     exception);
   if (q == (Quantum *) NULL)
     return;
   SetPixelRed(image,ScaleShortToQuantum((unsigned short) (65535.0*
     GetPseudoRandomValue(random_info)+0.5)),q);
   SetPixelGreen(image,ScaleShortToQuantum((unsigned short) (65535.0*
     GetPseudoRandomValue(random_info)+0.5)),q);
   SetPixelBlue(image,ScaleShortToQuantum((unsigned short) (65535.0*
     GetPseudoRandomValue(random_info)+0.5)),q);
   (void) SyncAuthenticPixels(image,exception);
 }

 static Image *ReadPlasmaImage(const ImageInfo *image_info,
   ExceptionInfo *exception)
 {
   Image
     *image;

   ImageInfo
     *read_info;

   MagickBooleanType
     status;

   register ssize_t
     x;

   register Quantum
     *q;

   register 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);
   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+=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();
       PlasmaPixel(image,random_info,segment_info.x1,segment_info.y1,exception);
       PlasmaPixel(image,random_info,segment_info.x1,(segment_info.y1+
         segment_info.y2)/2,exception);
       PlasmaPixel(image,random_info,segment_info.x1,segment_info.y2,exception);
       PlasmaPixel(image,random_info,(segment_info.x1+segment_info.x2)/2,
         segment_info.y1,exception);
       PlasmaPixel(image,random_info,(segment_info.x1+segment_info.x2)/2,
         (segment_info.y1+segment_info.y2)/2,exception);
       PlasmaPixel(image,random_info,(segment_info.x1+segment_info.x2)/2,
         segment_info.y2,exception);
       PlasmaPixel(image,random_info,segment_info.x2,segment_info.y1,exception);
       PlasmaPixel(image,random_info,segment_info.x2,(segment_info.y1+
         segment_info.y2)/2,exception);
       PlasmaPixel(image,random_info,segment_info.x2,segment_info.y2,exception);
       random_info=DestroyRandomInfo(random_info);
     }
   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));
 }

 /*
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %                                                                             %
 %                                                                             %
 %                                                                             %
 %   R e g i s t e r P L A S M A I m a g e                                     %
 %                                                                             %
 %                                                                             %
 %                                                                             %
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %
 %  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);
 }

 /*
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %                                                                             %
 %                                                                             %
 %                                                                             %
 %   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");
 }
	/*
	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	% %
	% %
	% %
	% 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 1999-2015 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 "MagickCore/studio.h"
	#include "MagickCore/blob.h"
	#include "MagickCore/blob-private.h"
	#include "MagickCore/cache.h"
	#include "MagickCore/channel.h"
	#include "MagickCore/constitute.h"
	#include "MagickCore/exception.h"
	#include "MagickCore/exception-private.h"
	#include "MagickCore/fx.h"
	#include "MagickCore/image.h"
	#include "MagickCore/image-private.h"
	#include "MagickCore/list.h"
	#include "MagickCore/magick.h"
	#include "MagickCore/memory_.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/module.h"

	/*
	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	% %
	% %
	% %
	% R e a d P L A S M A I m a g e %
	% %
	% %
	% %
	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	%
	% 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 void PlasmaPixel(Image image,RandomInfo random_info,double x,
	double y,ExceptionInfo *exception)
	{
	register Quantum
	*q;

	q=GetAuthenticPixels(image,(ssize_t) ceil(x-0.5),(ssize_t) ceil(y-0.5),1,1,
	exception);
	if (q == (Quantum *) NULL)
	return;
	SetPixelRed(image,ScaleShortToQuantum((unsigned short) (65535.0*
	GetPseudoRandomValue(random_info)+0.5)),q);
	SetPixelGreen(image,ScaleShortToQuantum((unsigned short) (65535.0*
	GetPseudoRandomValue(random_info)+0.5)),q);
	SetPixelBlue(image,ScaleShortToQuantum((unsigned short) (65535.0*
	GetPseudoRandomValue(random_info)+0.5)),q);
	(void) SyncAuthenticPixels(image,exception);
	}

	static Image ReadPlasmaImage(const ImageInfo image_info,
	ExceptionInfo *exception)
	{
	Image
	*image;

	ImageInfo
	*read_info;

	MagickBooleanType
	status;

	register ssize_t
	x;

	register Quantum
	*q;

	register 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);
	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+=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();
	PlasmaPixel(image,random_info,segment_info.x1,segment_info.y1,exception);
	PlasmaPixel(image,random_info,segment_info.x1,(segment_info.y1+
	segment_info.y2)/2,exception);
	PlasmaPixel(image,random_info,segment_info.x1,segment_info.y2,exception);
	PlasmaPixel(image,random_info,(segment_info.x1+segment_info.x2)/2,
	segment_info.y1,exception);
	PlasmaPixel(image,random_info,(segment_info.x1+segment_info.x2)/2,
	(segment_info.y1+segment_info.y2)/2,exception);
	PlasmaPixel(image,random_info,(segment_info.x1+segment_info.x2)/2,
	segment_info.y2,exception);
	PlasmaPixel(image,random_info,segment_info.x2,segment_info.y1,exception);
	PlasmaPixel(image,random_info,segment_info.x2,(segment_info.y1+
	segment_info.y2)/2,exception);
	PlasmaPixel(image,random_info,segment_info.x2,segment_info.y2,exception);
	random_info=DestroyRandomInfo(random_info);
	}
	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));
	}

	/*
	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	% %
	% %
	% %
	% R e g i s t e r P L A S M A I m a g e %
	% %
	% %
	% %
	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	%
	% 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);
	}

	/*
	%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
	% %
	% %
	% %
	% 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");
	}