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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% BBBB RRRR AAA IIIII L L EEEEE %
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% B B R R A A I L L E %
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% BBBB RRRR AAAAA I L L EEE %
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% B B R R A A I L L E %
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% BBBB R R A A IIIII LLLLL LLLLL EEEEE %
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% %
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% %
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% Read/Write Braille Format %
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% %
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% Samuel Thibault %
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% February 2008 %
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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/attribute.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-private.h"
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#include "MagickCore/colorspace.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/image.h"
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#include "MagickCore/image-private.h"
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#include "MagickCore/list.h"
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#include "MagickCore/magick.h"
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#include "MagickCore/memory_.h"
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#include "MagickCore/module.h"
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#include "MagickCore/monitor.h"
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#include "MagickCore/monitor-private.h"
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#include "MagickCore/pixel-accessor.h"
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#include "MagickCore/property.h"
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#include "MagickCore/quantize.h"
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#include "MagickCore/static.h"
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#include "MagickCore/string_.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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WriteBRAILLEImage(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 B R A I L L E 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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% RegisterBRAILLEImage() adds values for the Braille format to
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% the list of supported formats. The values 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 RegisterBRAILLEImage method is:
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%
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% size_t RegisterBRAILLEImage(void)
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%
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*/
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ModuleExport size_t RegisterBRAILLEImage(void)
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{
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MagickInfo
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*entry;
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entry=AcquireMagickInfo("BRAILLE","BRF","BRF ASCII Braille format");
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entry->encoder=(EncodeImageHandler *) WriteBRAILLEImage;
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entry->flags^=CoderAdjoinFlag;
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(void) RegisterMagickInfo(entry);
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entry=AcquireMagickInfo("BRAILLE","UBRL","Unicode Text format");
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entry->encoder=(EncodeImageHandler *) WriteBRAILLEImage;
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entry->flags^=CoderAdjoinFlag;
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(void) RegisterMagickInfo(entry);
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entry=AcquireMagickInfo("BRAILLE","UBRL6","Unicode Text format 6dot");
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entry->encoder=(EncodeImageHandler *) WriteBRAILLEImage;
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entry->flags^=CoderAdjoinFlag;
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(void) RegisterMagickInfo(entry);
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entry=AcquireMagickInfo("BRAILLE","ISOBRL","ISO/TR 11548-1 format");
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entry->encoder=(EncodeImageHandler *) WriteBRAILLEImage;
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entry->flags^=CoderAdjoinFlag;
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(void) RegisterMagickInfo(entry);
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entry=AcquireMagickInfo("BRAILLE","ISOBRL6","ISO/TR 11548-1 format 6dot");
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entry->encoder=(EncodeImageHandler *) WriteBRAILLEImage;
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entry->flags^=CoderAdjoinFlag;
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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 B R A I L L E 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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% UnregisterBRAILLEImage() removes format registrations made by the
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% BRAILLE module from the list of supported formats.
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%
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% The format of the UnregisterBRAILLEImage method is:
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%
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% UnregisterBRAILLEImage(void)
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%
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*/
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ModuleExport void UnregisterBRAILLEImage(void)
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{
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(void) UnregisterMagickInfo("BRF");
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(void) UnregisterMagickInfo("UBRL");
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(void) UnregisterMagickInfo("UBRL6");
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(void) UnregisterMagickInfo("ISOBRL");
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(void) UnregisterMagickInfo("ISOBRL6");
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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 B R A I L L E 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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% WriteBRAILLEImage() writes an image to a file in the Braille format.
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%
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% The format of the WriteBRAILLEImage method is:
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%
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% MagickBooleanType WriteBRAILLEImage(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 WriteBRAILLEImage(const ImageInfo *image_info,
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Image *image,ExceptionInfo *exception)
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{
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#define do_cell(dx,dy,bit) \
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{ \
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if (image->storage_class == PseudoClass) \
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cell|=(GetPixelIndex(image,p+x+dx+dy*image->columns) == polarity) << bit; \
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else \
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cell|=(GetPixelGreen(image,p+x+dx+dy*image->columns) == 0) << bit; \
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}
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char
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buffer[MagickPathExtent];
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const char
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*value;
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int
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unicode = 0,
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iso_11548_1 = 0;
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MagickBooleanType
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status;
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Quantum
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polarity;
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const Quantum
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*p;
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ssize_t
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x;
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size_t
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cell_height = 4;
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ssize_t
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y;
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/*
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Open output image file.
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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 (LocaleCompare(image_info->magick,"UBRL") == 0)
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unicode=1;
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else if (LocaleCompare(image_info->magick,"UBRL6") == 0)
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{
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unicode=1;
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cell_height=3;
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}
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else
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if (LocaleCompare(image_info->magick,"ISOBRL") == 0)
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iso_11548_1=1;
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else
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if (LocaleCompare(image_info->magick,"ISOBRL6") == 0)
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{
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iso_11548_1=1;
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cell_height=3;
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}
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else
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cell_height=3;
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if (image->debug != MagickFalse)
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(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
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assert(exception != (ExceptionInfo *) NULL);
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assert(exception->signature == MagickCoreSignature);
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status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
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if (status == MagickFalse)
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return(status);
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if (!iso_11548_1)
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{
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value=GetImageProperty(image,"label",exception);
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if (value != (const char *) NULL)
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{
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(void) FormatLocaleString(buffer,MagickPathExtent,"Title: %s\n",
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value);
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(void) WriteBlobString(image,buffer);
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}
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if (image->page.x != 0)
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{
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(void) FormatLocaleString(buffer,MagickPathExtent,"X: %.20g\n",
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(double) image->page.x);
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(void) WriteBlobString(image,buffer);
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}
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if (image->page.y != 0)
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{
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(void) FormatLocaleString(buffer,MagickPathExtent,"Y: %.20g\n",
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(double) image->page.y);
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(void) WriteBlobString(image,buffer);
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}
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(void) FormatLocaleString(buffer,MagickPathExtent,"Width: %.20g\n",
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(double) (image->columns+(image->columns % 2)));
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(void) WriteBlobString(image,buffer);
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(void) FormatLocaleString(buffer,MagickPathExtent,"Height: %.20g\n",
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(double) image->rows);
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(void) WriteBlobString(image,buffer);
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(void) WriteBlobString(image,"\n");
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}
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(void) SetImageType(image,BilevelType,exception);
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polarity=0;
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if (image->storage_class == PseudoClass)
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{
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polarity=(Quantum) (GetPixelInfoIntensity(image,&image->colormap[0]) >=
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(QuantumRange/2.0));
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if (image->colors == 2)
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polarity=(Quantum) (GetPixelInfoIntensity(image,&image->colormap[0]) >=
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GetPixelInfoIntensity(image,&image->colormap[1]));
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}
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for (y=0; y < (ssize_t) image->rows; y+=(ssize_t) cell_height)
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{
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if ((y+cell_height) > image->rows)
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cell_height=(size_t) (image->rows-y);
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p=GetVirtualPixels(image,0,y,image->columns,cell_height,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+=2)
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{
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MagickBooleanType
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two_columns;
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unsigned char
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cell = 0;
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two_columns=(x+1 < (ssize_t) image->columns) ? MagickTrue : MagickFalse;
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do_cell(0,0,0)
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if (two_columns != MagickFalse)
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do_cell(1,0,3)
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if (cell_height > 1)
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{
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do_cell(0,1,1)
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if (two_columns != MagickFalse)
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do_cell(1,1,4)
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if (cell_height > 2)
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{
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do_cell(0,2,2)
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if (two_columns != MagickFalse)
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do_cell(1,2,5)
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if (cell_height > 3)
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{
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do_cell(0,3,6)
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if (two_columns != MagickFalse)
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do_cell(1,3,7)
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}
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}
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}
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if (unicode != 0)
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{
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unsigned char
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utf8[3];
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/*
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Unicode text.
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*/
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utf8[0]=(unsigned char) (0xe0|((0x28 >> 4) & 0x0f));
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utf8[1]=0x80|((0x28<<2) & 0x3f)|(cell >> 6);
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utf8[2]=0x80|(cell & 0x3f);
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(void) WriteBlob(image,3,utf8);
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}
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else if (iso_11548_1)
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{
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/*
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ISO/TR 11548-1 binary.
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*/
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(void) WriteBlobByte(image,cell);
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}
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else
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{
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static const unsigned char
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iso_to_brf[64] =
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{
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' ', 'A', '1', 'B', '\'', 'K', '2', 'L',
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'@', 'C', 'I', 'F', '/', 'M', 'S', 'P',
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'"', 'E', '3', 'H', '9', 'O', '6', 'R',
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'^', 'D', 'J', 'G', '>', 'N', 'T', 'Q',
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',', '*', '5', '<', '-', 'U', '8', 'V',
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'.', '%', '[', '$', '+', 'X', '!', '&',
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';', ':', '4', '\\', '0', 'Z', '7', '(',
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'_', '?', 'W', ']', '#', 'Y', ')', '='
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};
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/*
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BRF.
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*/
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(void) WriteBlobByte(image,iso_to_brf[cell]);
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}
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}
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if (iso_11548_1 == 0)
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(void) WriteBlobByte(image,'\n');
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status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
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image->rows);
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if (status == MagickFalse)
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break;
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}
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|
(void) CloseBlob(image);
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|
return(MagickTrue);
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}
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