/*
% Copyright (C) 2003-2020 GraphicsMagick Group
% Copyright (C) 2002 ImageMagick Studio
% Copyright 1991-1999 E. I. du Pont de Nemours and Company
%
% This program is covered by multiple licenses, which are described in
% Copyright.txt. You should have received a copy of Copyright.txt with this
% package; otherwise see http://www.graphicsmagick.org/www/Copyright.html.
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% 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 %
% John Cristy %
% July 1992 %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%
*/
/*
Include declarations.
*/
#include "magick/studio.h"
#include "magick/blob.h"
#include "magick/pixel_cache.h"
#include "magick/constitute.h"
#include "magick/magick.h"
#include "magick/monitor.h"
#include "magick/plasma.h"
#include "magick/random.h"
#include "magick/utility.h"
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e a d P L A S M A I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Method ReadPlasmaImage creates a plasma fractal image. The image is
% initialized to 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: Method ReadPlasmaImage returns a pointer to the image after
% creating it. 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 void PlasmaPixel(Image *image,double x,double y)
{
register PixelPacket
*q;
q=GetImagePixels(image,(long) (x+0.5),(long) (y+0.5),1,1);
if (q == (PixelPacket *) NULL)
return;
q->red=(Quantum) (MaxRGBDouble*MagickRandomReal()+0.5);
q->green=(Quantum) (MaxRGBDouble*MagickRandomReal()+0.5);
q->blue=(Quantum) (MaxRGBDouble*MagickRandomReal()+0.5);
(void) SyncImagePixels(image);
}
static Image *ReadPlasmaImage(const ImageInfo *image_info,
ExceptionInfo *exception)
{
#define PlasmaImageText "[%s] Applying image plasma..."
Image
*image;
ImageInfo
*clone_info;
long
y;
register long
i,
x;
register PixelPacket
*q;
SegmentInfo
segment_info;
unsigned long
depth,
max_depth;
/*
Recursively apply plasma to the image.
*/
clone_info=CloneImageInfo(image_info);
clone_info->blob=(void *) NULL;
clone_info->length=0;
(void) FormatString(clone_info->filename,"gradient:%.1024s",
image_info->filename);
image=ReadImage(clone_info,exception);
DestroyImageInfo(clone_info);
if (image == (Image *) NULL)
return(image);
ContinueTimer(&image->timer);
(void) strlcpy(image->filename,image_info->filename,sizeof(image->filename));
image->storage_class=DirectClass;
for (y=0; y < (long) image->rows; y++)
{
q=GetImagePixels(image,0,y,image->columns,1);
if (q == (PixelPacket *) NULL)
break;
for (x=0; x < (long) image->columns; x++)
{
q->opacity=(Quantum) (MaxRGB/2);
q++;
}
if (!SyncImagePixels(image))
break;
}
segment_info.x1=0;
segment_info.y1=0;
segment_info.x2=image->columns-1;
segment_info.y2=image->rows-1;
if (LocaleCompare(image_info->filename,"fractal") == 0)
{
/*
Seed pixels before recursion.
*/
PlasmaPixel(image,segment_info.x1,segment_info.y1);
PlasmaPixel(image,segment_info.x1,(segment_info.y1+segment_info.y2)/2);
PlasmaPixel(image,segment_info.x1,segment_info.y2);
PlasmaPixel(image,(segment_info.x1+segment_info.x2)/2,segment_info.y1);
PlasmaPixel(image,(segment_info.x1+segment_info.x2)/2,
(segment_info.y1+segment_info.y2)/2);
PlasmaPixel(image,(segment_info.x1+segment_info.x2)/2,segment_info.y2);
PlasmaPixel(image,segment_info.x2,segment_info.y1);
PlasmaPixel(image,segment_info.x2,(segment_info.y1+segment_info.y2)/2);
PlasmaPixel(image,segment_info.x2,segment_info.y2);
}
i=(long) (Max(image->columns,image->rows) >> 1);
for (max_depth=0; i != 0; max_depth++)
i>>=1;
for (depth=1; ; depth++)
{
if (!MagickMonitorFormatted(depth,max_depth,&image->exception,
PlasmaImageText,image->filename))
break;
if (PlasmaImage(image,&segment_info,0,depth))
break;
}
StopTimer(&image->timer);
return(image);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e g i s t e r P L A S M A I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Method 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:
%
% RegisterPLASMAImage(void)
%
*/
ModuleExport void RegisterPLASMAImage(void)
{
MagickInfo
*entry;
entry=SetMagickInfo("PLASMA");
entry->decoder=(DecoderHandler) ReadPlasmaImage;
entry->adjoin=False;
entry->description="Plasma fractal image";
entry->module="PLASMA";
entry->coder_class=StableCoderClass;
entry->extension_treatment=IgnoreExtensionTreatment;
(void) RegisterMagickInfo(entry);
entry=SetMagickInfo("FRACTAL");
entry->decoder=(DecoderHandler) ReadPlasmaImage;
entry->adjoin=False;
entry->description="Plasma fractal image";
entry->module="PLASMA";
entry->coder_class=StableCoderClass;
entry->extension_treatment=IgnoreExtensionTreatment;
(void) RegisterMagickInfo(entry);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% U n r e g i s t e r P L A S M A I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Method 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");
}
