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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% H H IIIII SSSSS TTTTT OOO GGGG RRRR AAA M M %
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% H H I SS T O O G R R A A MM MM %
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% HHHHH I SSS T O O G GG RRRR AAAAA M M M %
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% H H I SS T O O G G R R A A M M %
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% H H IIIII SSSSS T OOO GGG R R A A M M %
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% %
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% %
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% Write A Histogram Image. %
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% %
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% Software Design %
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% Cristy %
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% July 1992 %
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% %
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% %
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% Copyright 1999-2021 ImageMagick Studio LLC, a non-profit organization %
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% dedicated to making software imaging solutions freely available. %
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% %
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% You may not use this file except in compliance with the License. You may %
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% obtain a copy of the License at %
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% %
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% https://imagemagick.org/script/license.php %
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% %
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% Unless required by applicable law or agreed to in writing, software %
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% distributed under the License is distributed on an "AS IS" BASIS, %
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% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %
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% See the License for the specific language governing permissions and %
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% limitations under the License. %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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%
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*/
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/*
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Include declarations.
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*/
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#include "MagickCore/studio.h"
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#include "MagickCore/artifact.h"
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#include "MagickCore/blob.h"
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#include "MagickCore/blob-private.h"
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#include "MagickCore/cache.h"
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#include "MagickCore/color.h"
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#include "MagickCore/color-private.h"
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#include "MagickCore/constitute.h"
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#include "MagickCore/exception.h"
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#include "MagickCore/exception-private.h"
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#include "MagickCore/geometry.h"
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#include "MagickCore/histogram.h"
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#include "MagickCore/image-private.h"
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#include "MagickCore/magick.h"
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#include "MagickCore/memory_.h"
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#include "MagickCore/monitor.h"
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#include "MagickCore/monitor-private.h"
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#include "MagickCore/option.h"
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#include "MagickCore/pixel-accessor.h"
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#include "MagickCore/property.h"
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#include "MagickCore/quantum-private.h"
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#include "MagickCore/resource_.h"
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#include "MagickCore/static.h"
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#include "MagickCore/statistic.h"
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#include "MagickCore/string_.h"
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#include "MagickCore/module.h"
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#include "MagickCore/token.h"
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#include "MagickCore/utility.h"
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/*
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Forward declarations.
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*/
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static MagickBooleanType
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WriteHISTOGRAMImage(const ImageInfo *,Image *,ExceptionInfo *);
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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% R e g i s t e r H I S T O G R A M I m a g e %
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% %
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% %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% RegisterHISTOGRAMImage() adds attributes for the Histogram image format
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% to the list of supported formats. The attributes include the image format
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% tag, a method to read and/or write the format, whether the format
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% supports the saving of more than one frame to the same file or blob,
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% whether the format supports native in-memory I/O, and a brief
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% description of the format.
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%
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% The format of the RegisterHISTOGRAMImage method is:
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%
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% size_t RegisterHISTOGRAMImage(void)
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%
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*/
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ModuleExport size_t RegisterHISTOGRAMImage(void)
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{
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MagickInfo
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*entry;
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entry=AcquireMagickInfo("HISTOGRAM","HISTOGRAM","Histogram of the image");
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entry->encoder=(EncodeImageHandler *) WriteHISTOGRAMImage;
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entry->flags^=CoderAdjoinFlag;
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entry->format_type=ImplicitFormatType;
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(void) RegisterMagickInfo(entry);
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return(MagickImageCoderSignature);
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}
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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% U n r e g i s t e r H I S T O G R A M I m a g e %
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% %
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% %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% UnregisterHISTOGRAMImage() removes format registrations made by the
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% HISTOGRAM module from the list of supported formats.
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%
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% The format of the UnregisterHISTOGRAMImage method is:
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%
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% UnregisterHISTOGRAMImage(void)
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%
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*/
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ModuleExport void UnregisterHISTOGRAMImage(void)
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{
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(void) UnregisterMagickInfo("HISTOGRAM");
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}
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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% W r i t e H I S T O G R A M I m a g e %
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% %
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% %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% WriteHISTOGRAMImage() writes an image to a file in Histogram format.
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% The image shows a histogram of the color (or gray) values in the image. The
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% image consists of three overlaid histograms: a red one for the red channel,
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% a green one for the green channel, and a blue one for the blue channel. The
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% image comment contains a list of unique pixel values and the number of times
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% each occurs in the image.
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%
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% This method is strongly based on a similar one written by
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% muquit@warm.semcor.com which in turn is based on ppmhistmap of netpbm.
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%
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% The format of the WriteHISTOGRAMImage method is:
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%
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% MagickBooleanType WriteHISTOGRAMImage(const ImageInfo *image_info,
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% Image *image,ExceptionInfo *exception)
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%
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% A description of each parameter follows.
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%
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% o image_info: the image info.
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%
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% o image: The image.
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%
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% o exception: return any errors or warnings in this structure.
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%
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*/
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static MagickBooleanType WriteHISTOGRAMImage(const ImageInfo *image_info,
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Image *image,ExceptionInfo *exception)
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{
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#define HistogramDensity "256x200"
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char
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filename[MagickPathExtent];
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const char
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*option;
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Image
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*histogram_image;
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ImageInfo
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*write_info;
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MagickBooleanType
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status;
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PixelInfo
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*histogram;
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double
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maximum,
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scale;
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RectangleInfo
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geometry;
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const Quantum
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*p;
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Quantum
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*q,
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*r;
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ssize_t
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x;
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size_t
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length;
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ssize_t
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y;
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/*
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Allocate histogram image.
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*/
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assert(image_info != (const ImageInfo *) NULL);
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assert(image_info->signature == MagickCoreSignature);
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assert(image != (Image *) NULL);
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assert(image->signature == MagickCoreSignature);
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if (image->debug != MagickFalse)
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(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
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image_info->filename);
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SetGeometry(image,&geometry);
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if (image_info->density == (char *) NULL)
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(void) ParseAbsoluteGeometry(HistogramDensity,&geometry);
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else
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(void) ParseAbsoluteGeometry(image_info->density,&geometry);
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histogram_image=CloneImage(image,geometry.width,geometry.height,MagickTrue,
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exception);
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if (histogram_image == (Image *) NULL)
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ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
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(void) SetImageStorageClass(histogram_image,DirectClass,exception);
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/*
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Allocate histogram count arrays.
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*/
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length=MagickMax((size_t) ScaleQuantumToChar(QuantumRange)+1UL,
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histogram_image->columns);
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histogram=(PixelInfo *) AcquireQuantumMemory(length,sizeof(*histogram));
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if (histogram == (PixelInfo *) NULL)
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{
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histogram_image=DestroyImage(histogram_image);
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ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
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}
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/*
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Initialize histogram count arrays.
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*/
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(void) memset(histogram,0,length*sizeof(*histogram));
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for (y=0; y < (ssize_t) image->rows; y++)
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{
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p=GetVirtualPixels(image,0,y,image->columns,1,exception);
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if (p == (const Quantum *) NULL)
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break;
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for (x=0; x < (ssize_t) image->columns; x++)
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{
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if ((GetPixelRedTraits(image) & UpdatePixelTrait) != 0)
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histogram[ScaleQuantumToChar(GetPixelRed(image,p))].red++;
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if ((GetPixelGreenTraits(image) & UpdatePixelTrait) != 0)
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histogram[ScaleQuantumToChar(GetPixelGreen(image,p))].green++;
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if ((GetPixelBlueTraits(image) & UpdatePixelTrait) != 0)
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histogram[ScaleQuantumToChar(GetPixelBlue(image,p))].blue++;
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p+=GetPixelChannels(image);
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}
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}
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maximum=histogram[0].red;
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for (x=0; x < (ssize_t) histogram_image->columns; x++)
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{
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if (((GetPixelRedTraits(image) & UpdatePixelTrait) != 0) &&
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(maximum < histogram[x].red))
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maximum=histogram[x].red;
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if (((GetPixelGreenTraits(image) & UpdatePixelTrait) != 0) &&
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(maximum < histogram[x].green))
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maximum=histogram[x].green;
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if (((GetPixelBlueTraits(image) & UpdatePixelTrait) != 0) &&
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(maximum < histogram[x].blue))
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maximum=histogram[x].blue;
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}
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scale=0.0;
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if (fabs((double) maximum) >= MagickEpsilon)
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scale=(double) histogram_image->rows/maximum;
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/*
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Initialize histogram image.
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*/
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(void) QueryColorCompliance("#000000",AllCompliance,
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&histogram_image->background_color,exception);
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(void) SetImageBackgroundColor(histogram_image,exception);
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for (x=0; x < (ssize_t) histogram_image->columns; x++)
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{
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q=GetAuthenticPixels(histogram_image,x,0,1,histogram_image->rows,exception);
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if (q == (Quantum *) NULL)
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break;
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if ((GetPixelRedTraits(image) & UpdatePixelTrait) != 0)
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{
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y=CastDoubleToLong(ceil((double) histogram_image->rows-scale*
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histogram[x].red-0.5));
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r=q+y*GetPixelChannels(histogram_image);
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for ( ; y < (ssize_t) histogram_image->rows; y++)
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{
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SetPixelRed(histogram_image,QuantumRange,r);
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r+=GetPixelChannels(histogram_image);
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}
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}
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if ((GetPixelGreenTraits(image) & UpdatePixelTrait) != 0)
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{
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y=CastDoubleToLong(ceil((double) histogram_image->rows-scale*
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histogram[x].green-0.5));
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r=q+y*GetPixelChannels(histogram_image);
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for ( ; y < (ssize_t) histogram_image->rows; y++)
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{
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SetPixelGreen(histogram_image,QuantumRange,r);
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r+=GetPixelChannels(histogram_image);
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}
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}
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if ((GetPixelBlueTraits(image) & UpdatePixelTrait) != 0)
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{
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y=CastDoubleToLong(ceil((double) histogram_image->rows-scale*
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histogram[x].blue-0.5));
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r=q+y*GetPixelChannels(histogram_image);
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for ( ; y < (ssize_t) histogram_image->rows; y++)
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{
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SetPixelBlue(histogram_image,QuantumRange,r);
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r+=GetPixelChannels(histogram_image);
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}
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}
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if (SyncAuthenticPixels(histogram_image,exception) == MagickFalse)
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break;
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status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
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histogram_image->rows);
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if (status == MagickFalse)
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break;
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}
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histogram=(PixelInfo *) RelinquishMagickMemory(histogram);
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option=GetImageOption(image_info,"histogram:unique-colors");
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if ((IsHistogramImage(image,exception) != MagickFalse) ||
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(IsStringTrue(option) != MagickFalse) ||
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(GetImageOption(image_info,"format") != (const char *) NULL))
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{
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FILE
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*file;
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int
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unique_file;
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/*
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Add a unique colors as an image comment.
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*/
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file=(FILE *) NULL;
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unique_file=AcquireUniqueFileResource(filename);
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if (unique_file != -1)
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file=fdopen(unique_file,"wb");
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if ((unique_file != -1) && (file != (FILE *) NULL))
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{
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char
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*property;
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(void) GetNumberColors(image,file,exception);
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(void) fclose(file);
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property=FileToString(filename,~0UL,exception);
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if (property != (char *) NULL)
|
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|
{
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(void) SetImageProperty(histogram_image,"comment",property,
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|
exception);
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property=DestroyString(property);
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|
}
|
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|
}
|
|
|
(void) RelinquishUniqueFileResource(filename);
|
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|
}
|
|
|
/*
|
|
|
Write Histogram image.
|
|
|
*/
|
|
|
(void) CopyMagickString(histogram_image->filename,image_info->filename,
|
|
|
MagickPathExtent);
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|
|
(void) ResetImagePage(histogram_image,"0x0+0+0");
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|
write_info=CloneImageInfo(image_info);
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|
|
*write_info->magick='\0';
|
|
|
(void) SetImageInfo(write_info,1,exception);
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|
|
if ((*write_info->magick == '\0') ||
|
|
|
(LocaleCompare(write_info->magick,"HISTOGRAM") == 0))
|
|
|
(void) FormatLocaleString(histogram_image->filename,MagickPathExtent,
|
|
|
"miff:%s",write_info->filename);
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|
|
status=WriteImage(write_info,histogram_image,exception);
|
|
|
histogram_image=DestroyImage(histogram_image);
|
|
|
write_info=DestroyImageInfo(write_info);
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|
|
return(status);
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|
|
}
|
