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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 1999-2019 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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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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register const Quantum |
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*p; |
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register 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 if (LocaleCompare(image_info->magick, "ISOBRL") == 0) |
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iso_11548_1=1; |
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else 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", 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",(double) |
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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",(double) |
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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",(double) |
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(image->columns+(image->columns % 2))); |
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(void) WriteBlobString(image,buffer); |
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(void) FormatLocaleString(buffer,MagickPathExtent,"Height: %.20g\n",(double) |
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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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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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unsigned char cell = 0; |
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int two_columns = x+1 < (ssize_t) image->columns; |
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do |
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{ |
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#define do_cell(dx,dy,bit) do { \ |
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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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DisableMSCWarning(4127) \ |
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} while (0) \ |
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RestoreMSCWarning |
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do_cell(0,0,0); |
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if (two_columns) |
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do_cell(1,0,3); |
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if (cell_height < 2) |
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break; |
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do_cell(0,1,1); |
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if (two_columns) |
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do_cell(1,1,4); |
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if (cell_height < 3) |
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break; |
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do_cell(0,2,2); |
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if (two_columns) |
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do_cell(1,2,5); |
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if (cell_height < 4) |
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break; |
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do_cell(0,3,6); |
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if (two_columns) |
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do_cell(1,3,7); |
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DisableMSCWarning(4127) |
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} while(0); |
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RestoreMSCWarning |
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if (unicode) |
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{ |
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unsigned char utf8[3]; |
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/* Unicode text */ |
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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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/* ISO/TR 11548-1 binary */ |
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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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/* BRF */ |
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static const unsigned char iso_to_brf[64] = { |
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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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(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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