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gerrit-public.fairphone.software / platform / external / ImageMagick / 042ee78fa9004bf1ac6a95f09d9d1faca631dda1 / . / coders / plasma.c
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/*
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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 %
% John Cristy %
% July 1992 %
% %
% %
% Copyright 1999-2011 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/constitute.h"
#include "magick/exception.h"
#include "magick/exception-private.h"
#include "magick/fx.h"
#include "magick/image.h"
#include "magick/image-private.h"
#include "magick/list.h"
#include "magick/magick.h"
#include "magick/memory_.h"
#include "magick/monitor.h"
#include "magick/monitor-private.h"
#include "magick/random_.h"
#include "magick/random-private.h"
#include "magick/signature-private.h"
#include "magick/quantum-private.h"
#include "magick/static.h"
#include "magick/string_.h"
#include "magick/module.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 size_t MagickMax(const size_t x,const size_t y)
{
if (x > y)
return(x);
return(y);
}
static inline void PlasmaPixel(Image *image,RandomInfo *random_info,double x,
double y)
{
ExceptionInfo
*exception;
QuantumAny
range;
register PixelPacket
*q;
exception=(&image->exception);
q=GetAuthenticPixels(image,(ssize_t) ceil(x-0.5),(ssize_t) ceil(y-0.5),1,1,
exception);
if (q == (PixelPacket *) NULL)
return;
range=GetQuantumRange(16UL);
q->red=ScaleAnyToQuantum((size_t) (65535.0*
GetPseudoRandomValue(random_info)+0.5),range);
q->green=ScaleAnyToQuantum((size_t) (65535.0*
GetPseudoRandomValue(random_info)+0.5),range);
q->blue=ScaleAnyToQuantum((size_t) (65535.0*
GetPseudoRandomValue(random_info)+0.5),range);
(void) SyncAuthenticPixels(image,exception);
}
static Image *ReadPlasmaImage(const ImageInfo *image_info,
ExceptionInfo *exception)
{
Image
*image;
ImageInfo
*read_info;
ssize_t
y;
MagickBooleanType
status;
register ssize_t
x;
register PixelPacket
*q;
register size_t
i;
SegmentInfo
segment_info;
size_t
depth,
max_depth;
/*
Recursively apply plasma to the image.
*/
read_info=CloneImageInfo(image_info);
SetImageInfoBlob(read_info,(void *) NULL,0);
(void) FormatMagickString(read_info->filename,MaxTextExtent,
"gradient:%s",image_info->filename);
image=ReadImage(read_info,exception);
read_info=DestroyImageInfo(read_info);
if (image == (Image *) NULL)
return((Image *) NULL);
image->storage_class=DirectClass;
for (y=0; y < (ssize_t) image->rows; y++)
{
q=GetAuthenticPixels(image,0,y,image->columns,1,exception);
if (q == (PixelPacket *) NULL)
break;
for (x=0; x < (ssize_t) image->columns; x++)
{
q->opacity=(Quantum) (QuantumRange/2);
q++;
}
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.
*/
random_info=AcquireRandomInfo();
PlasmaPixel(image,random_info,segment_info.x1,segment_info.y1);
PlasmaPixel(image,random_info,segment_info.x1,(segment_info.y1+
segment_info.y2)/2);
PlasmaPixel(image,random_info,segment_info.x1,segment_info.y2);
PlasmaPixel(image,random_info,(segment_info.x1+segment_info.x2)/2,
segment_info.y1);
PlasmaPixel(image,random_info,(segment_info.x1+segment_info.x2)/2,
(segment_info.y1+segment_info.y2)/2);
PlasmaPixel(image,random_info,(segment_info.x1+segment_info.x2)/2,
segment_info.y2);
PlasmaPixel(image,random_info,segment_info.x2,segment_info.y1);
PlasmaPixel(image,random_info,segment_info.x2,(segment_info.y1+
segment_info.y2)/2);
PlasmaPixel(image,random_info,segment_info.x2,segment_info.y2);
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) != MagickFalse)
break;
status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) depth,
max_depth);
if (status == MagickFalse)
break;
}
(void) SetImageAlphaChannel(image,DeactivateAlphaChannel);
return(GetFirstImageInList(image));
}
/*
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% %
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% %
% 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=SetMagickInfo("PLASMA");
entry->decoder=(DecodeImageHandler *) ReadPlasmaImage;
entry->adjoin=MagickFalse;
entry->format_type=ImplicitFormatType;
entry->description=ConstantString("Plasma fractal image");
entry->module=ConstantString("PLASMA");
(void) RegisterMagickInfo(entry);
entry=SetMagickInfo("FRACTAL");
entry->decoder=(DecodeImageHandler *) ReadPlasmaImage;
entry->adjoin=MagickFalse;
entry->format_type=ImplicitFormatType;
entry->description=ConstantString("Plasma fractal image");
entry->module=ConstantString("PLASMA");
(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 %
% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% 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");
}