forked from openkylin/imagemagick
631 lines
20 KiB
C
631 lines
20 KiB
C
/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% X X BBBB M M %
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% X X B B MM MM %
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% X BBBB M M M %
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% X X B B M M %
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% X X BBBB M M %
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% %
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% %
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% Read/Write X Windows System Bitmap Format %
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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 "magick/studio.h"
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#include "magick/attribute.h"
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#include "magick/blob.h"
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#include "magick/blob-private.h"
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#include "magick/cache.h"
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#include "magick/color-private.h"
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#include "magick/colormap.h"
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#include "magick/colorspace.h"
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#include "magick/colorspace-private.h"
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#include "magick/exception.h"
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#include "magick/exception-private.h"
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#include "magick/image.h"
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#include "magick/image-private.h"
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#include "magick/list.h"
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#include "magick/magick.h"
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#include "magick/memory_.h"
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#include "magick/monitor.h"
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#include "magick/monitor-private.h"
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#include "magick/pixel-accessor.h"
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#include "magick/quantum-private.h"
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#include "magick/static.h"
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#include "magick/string_.h"
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#include "magick/module.h"
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#include "magick/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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WriteXBMImage(const ImageInfo *,Image *);
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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% I s X B M %
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% %
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% %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% IsXBM() returns MagickTrue if the image format type, identified by the
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% magick string, is XBM.
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%
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% The format of the IsXBM method is:
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%
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% MagickBooleanType IsXBM(const unsigned char *magick,const size_t length)
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%
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% A description of each parameter follows:
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%
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% o magick: compare image format pattern against these bytes.
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%
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% o length: Specifies the length of the magick string.
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%
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*/
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static MagickBooleanType IsXBM(const unsigned char *magick,const size_t length)
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{
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if (length < 7)
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return(MagickFalse);
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if (memcmp(magick,"#define",7) == 0)
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return(MagickTrue);
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return(MagickFalse);
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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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% R e a d X B 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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% ReadXBMImage() reads an X11 bitmap image file and returns it. It
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% allocates the memory necessary for the new Image structure and returns a
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% pointer to the new image.
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%
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% The format of the ReadXBMImage method is:
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%
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% Image *ReadXBMImage(const ImageInfo *image_info,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 exception: return any errors or warnings in this structure.
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%
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*/
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static int XBMInteger(Image *image,short int *hex_digits)
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{
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int
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c;
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unsigned int
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value;
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/*
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Skip any leading whitespace.
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*/
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do
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{
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c=ReadBlobByte(image);
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if (c == EOF)
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return(-1);
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} while ((c == ' ') || (c == '\t') || (c == '\n') || (c == '\r'));
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/*
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Evaluate number.
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*/
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value=0;
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do
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{
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if (value <= (unsigned int) (INT_MAX/16))
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{
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value*=16;
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c&=0xff;
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if (value <= (unsigned int) ((INT_MAX-1)-hex_digits[c]))
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value+=hex_digits[c];
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}
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c=ReadBlobByte(image);
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if (c == EOF)
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return(-1);
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} while (hex_digits[c] >= 0);
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return((int) value);
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}
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static Image *ReadXBMImage(const ImageInfo *image_info,ExceptionInfo *exception)
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{
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char
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buffer[MaxTextExtent],
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name[MaxTextExtent];
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Image
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*image;
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int
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c;
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MagickBooleanType
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status;
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IndexPacket
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*indexes;
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ssize_t
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i,
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x;
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PixelPacket
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*q;
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unsigned char
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*p;
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long
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height,
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width;
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short int
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hex_digits[256];
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ssize_t
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y;
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unsigned char
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*data;
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unsigned int
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bit,
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byte,
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bytes_per_line,
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length,
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padding,
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version;
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/*
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Open 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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if (image_info->debug != MagickFalse)
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(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
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image_info->filename);
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assert(exception != (ExceptionInfo *) NULL);
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assert(exception->signature == MagickCoreSignature);
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image=AcquireImage(image_info);
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status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
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if (status == MagickFalse)
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{
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image=DestroyImageList(image);
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return((Image *) NULL);
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}
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/*
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Read X bitmap header.
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*/
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width=0;
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height=0;
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*name='\0';
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while (ReadBlobString(image,buffer) != (char *) NULL)
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if (sscanf(buffer,"#define %1024s %ld",name,&width) == 2)
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if ((strlen(name) >= 6) &&
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(LocaleCompare(name+strlen(name)-6,"_width") == 0))
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break;
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while (ReadBlobString(image,buffer) != (char *) NULL)
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if (sscanf(buffer,"#define %1024s %ld",name,&height) == 2)
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if ((strlen(name) >= 7) &&
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(LocaleCompare(name+strlen(name)-7,"_height") == 0))
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break;
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if ((width <= 0) || (height <= 0) || (EOFBlob(image) != MagickFalse))
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ThrowReaderException(CorruptImageError,"ImproperImageHeader");
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image->columns=(size_t) width;
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image->rows=(size_t) height;
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image->depth=8;
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image->storage_class=PseudoClass;
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image->colors=2;
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/*
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Scan until hex digits.
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*/
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version=11;
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while (ReadBlobString(image,buffer) != (char *) NULL)
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{
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if (sscanf(buffer,"static short %1024s = {",name) == 1)
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version=10;
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else
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if (sscanf(buffer,"static unsigned char %s = {",name) == 1)
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version=11;
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else
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if (sscanf(buffer,"static char %1024s = {",name) == 1)
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version=11;
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else
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continue;
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p=(unsigned char *) strrchr(name,'_');
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if (p == (unsigned char *) NULL)
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p=(unsigned char *) name;
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else
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p++;
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if (LocaleCompare("bits[]",(char *) p) == 0)
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break;
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}
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/*
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Initialize image structure.
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*/
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if (AcquireImageColormap(image,image->colors) == MagickFalse)
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ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
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/*
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Initialize colormap.
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*/
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image->colormap[0].red=QuantumRange;
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image->colormap[0].green=QuantumRange;
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image->colormap[0].blue=QuantumRange;
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image->colormap[1].red=(Quantum) 0;
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image->colormap[1].green=(Quantum) 0;
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image->colormap[1].blue=(Quantum) 0;
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if (image_info->ping != MagickFalse)
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{
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(void) CloseBlob(image);
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return(GetFirstImageInList(image));
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}
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status=SetImageExtent(image,image->columns,image->rows);
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if (status == MagickFalse)
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{
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InheritException(exception,&image->exception);
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return(DestroyImageList(image));
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}
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/*
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Initialize hex values.
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*/
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for (i=0; i < (ssize_t) (sizeof(hex_digits)/sizeof(*hex_digits)); i++)
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hex_digits[i]=(-1);
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hex_digits[(int) '0']=0;
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hex_digits[(int) '1']=1;
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hex_digits[(int) '2']=2;
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hex_digits[(int) '3']=3;
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hex_digits[(int) '4']=4;
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hex_digits[(int) '5']=5;
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hex_digits[(int) '6']=6;
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hex_digits[(int) '7']=7;
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hex_digits[(int) '8']=8;
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hex_digits[(int) '9']=9;
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hex_digits[(int) 'A']=10;
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hex_digits[(int) 'B']=11;
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hex_digits[(int) 'C']=12;
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hex_digits[(int) 'D']=13;
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hex_digits[(int) 'E']=14;
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hex_digits[(int) 'F']=15;
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hex_digits[(int) 'a']=10;
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hex_digits[(int) 'b']=11;
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hex_digits[(int) 'c']=12;
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hex_digits[(int) 'd']=13;
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hex_digits[(int) 'e']=14;
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hex_digits[(int) 'f']=15;
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hex_digits[(int) 'x']=0;
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hex_digits[(int) ' ']=(-1);
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hex_digits[(int) ',']=(-1);
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hex_digits[(int) '}']=(-1);
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hex_digits[(int) '\n']=(-1);
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hex_digits[(int) '\t']=(-1);
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/*
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Read hex image data.
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*/
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padding=0;
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if (((image->columns % 16) != 0) && ((image->columns % 16) < 9) &&
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(version == 10))
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padding=1;
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bytes_per_line=(unsigned int) (image->columns+7)/8+padding;
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length=(unsigned int) image->rows;
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data=(unsigned char *) AcquireQuantumMemory(length,bytes_per_line*
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sizeof(*data));
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if (data == (unsigned char *) NULL)
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ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
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p=data;
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if (version == 10)
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for (i=0; i < (ssize_t) (bytes_per_line*image->rows); (i+=2))
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{
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c=XBMInteger(image,hex_digits);
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if (c < 0)
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{
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data=(unsigned char *) RelinquishMagickMemory(data);
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ThrowReaderException(CorruptImageError,"ImproperImageHeader");
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}
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*p++=(unsigned char) c;
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if ((padding == 0) || (((i+2) % bytes_per_line) != 0))
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*p++=(unsigned char) (c >> 8);
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}
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else
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for (i=0; i < (ssize_t) (bytes_per_line*image->rows); i++)
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{
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c=XBMInteger(image,hex_digits);
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if (c < 0)
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{
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data=(unsigned char *) RelinquishMagickMemory(data);
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ThrowReaderException(CorruptImageError,"ImproperImageHeader");
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}
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*p++=(unsigned char) c;
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}
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if (EOFBlob(image) != MagickFalse)
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{
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data=(unsigned char *) RelinquishMagickMemory(data);
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ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
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}
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/*
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Convert X bitmap image to pixel packets.
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*/
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p=data;
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for (y=0; y < (ssize_t) image->rows; y++)
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{
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q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
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if (q == (PixelPacket *) NULL)
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break;
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indexes=GetAuthenticIndexQueue(image);
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bit=0;
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byte=0;
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for (x=0; x < (ssize_t) image->columns; x++)
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{
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if (bit == 0)
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byte=(unsigned int) (*p++);
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SetPixelIndex(indexes+x,(byte & 0x01) != 0 ? 0x01 : 0x00);
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bit++;
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byte>>=1;
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if (bit == 8)
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bit=0;
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}
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if (SyncAuthenticPixels(image,exception) == MagickFalse)
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break;
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status=SetImageProgress(image,LoadImageTag,(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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data=(unsigned char *) RelinquishMagickMemory(data);
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(void) SyncImage(image);
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(void) CloseBlob(image);
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return(GetFirstImageInList(image));
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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 X B M I m a g e %
|
||
% %
|
||
% %
|
||
% %
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
%
|
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% RegisterXBMImage() adds attributes for the XBM image format to
|
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% 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
|
||
% description of the format.
|
||
%
|
||
% The format of the RegisterXBMImage method is:
|
||
%
|
||
% size_t RegisterXBMImage(void)
|
||
%
|
||
*/
|
||
ModuleExport size_t RegisterXBMImage(void)
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||
{
|
||
MagickInfo
|
||
*entry;
|
||
|
||
entry=SetMagickInfo("XBM");
|
||
entry->decoder=(DecodeImageHandler *) ReadXBMImage;
|
||
entry->encoder=(EncodeImageHandler *) WriteXBMImage;
|
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entry->magick=(IsImageFormatHandler *) IsXBM;
|
||
entry->adjoin=MagickFalse;
|
||
entry->description=ConstantString(
|
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"X Windows system bitmap (black and white)");
|
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entry->magick_module=ConstantString("XBM");
|
||
(void) RegisterMagickInfo(entry);
|
||
return(MagickImageCoderSignature);
|
||
}
|
||
|
||
/*
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
% %
|
||
% %
|
||
% %
|
||
% U n r e g i s t e r X B M I m a g e %
|
||
% %
|
||
% %
|
||
% %
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
%
|
||
% UnregisterXBMImage() removes format registrations made by the
|
||
% XBM module from the list of supported formats.
|
||
%
|
||
% The format of the UnregisterXBMImage method is:
|
||
%
|
||
% UnregisterXBMImage(void)
|
||
%
|
||
*/
|
||
ModuleExport void UnregisterXBMImage(void)
|
||
{
|
||
(void) UnregisterMagickInfo("XBM");
|
||
}
|
||
|
||
/*
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
% %
|
||
% %
|
||
% %
|
||
% W r i t e X B M I m a g e %
|
||
% %
|
||
% %
|
||
% %
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
%
|
||
% Procedure WriteXBMImage() writes an image to a file in the X bitmap format.
|
||
%
|
||
% The format of the WriteXBMImage method is:
|
||
%
|
||
% MagickBooleanType WriteXBMImage(const ImageInfo *image_info,Image *image)
|
||
%
|
||
% A description of each parameter follows.
|
||
%
|
||
% o image_info: the image info.
|
||
%
|
||
% o image: The image.
|
||
%
|
||
%
|
||
*/
|
||
static MagickBooleanType WriteXBMImage(const ImageInfo *image_info,Image *image)
|
||
{
|
||
char
|
||
basename[MaxTextExtent],
|
||
buffer[MaxTextExtent];
|
||
|
||
MagickBooleanType
|
||
status;
|
||
|
||
const PixelPacket
|
||
*p;
|
||
|
||
ssize_t
|
||
x;
|
||
|
||
size_t
|
||
bit,
|
||
byte;
|
||
|
||
ssize_t
|
||
count,
|
||
y;
|
||
|
||
/*
|
||
Open output image file.
|
||
*/
|
||
assert(image_info != (const ImageInfo *) NULL);
|
||
assert(image_info->signature == MagickCoreSignature);
|
||
assert(image != (Image *) NULL);
|
||
assert(image->signature == MagickCoreSignature);
|
||
if (image->debug != MagickFalse)
|
||
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
|
||
status=OpenBlob(image_info,image,WriteBinaryBlobMode,&image->exception);
|
||
if (status == MagickFalse)
|
||
return(status);
|
||
(void) TransformImageColorspace(image,sRGBColorspace);
|
||
/*
|
||
Write X bitmap header.
|
||
*/
|
||
GetPathComponent(image->filename,BasePath,basename);
|
||
(void) FormatLocaleString(buffer,MaxTextExtent,"#define %s_width %.20g\n",
|
||
basename,(double) image->columns);
|
||
(void) WriteBlob(image,strlen(buffer),(unsigned char *) buffer);
|
||
(void) FormatLocaleString(buffer,MaxTextExtent,"#define %s_height %.20g\n",
|
||
basename,(double) image->rows);
|
||
(void) WriteBlob(image,strlen(buffer),(unsigned char *) buffer);
|
||
(void) FormatLocaleString(buffer,MaxTextExtent,
|
||
"static char %s_bits[] = {\n",basename);
|
||
(void) WriteBlob(image,strlen(buffer),(unsigned char *) buffer);
|
||
(void) CopyMagickString(buffer," ",MaxTextExtent);
|
||
(void) WriteBlob(image,strlen(buffer),(unsigned char *) buffer);
|
||
/*
|
||
Convert MIFF to X bitmap pixels.
|
||
*/
|
||
(void) SetImageType(image,BilevelType);
|
||
bit=0;
|
||
byte=0;
|
||
count=0;
|
||
x=0;
|
||
y=0;
|
||
(void) CopyMagickString(buffer," ",MaxTextExtent);
|
||
(void) WriteBlob(image,strlen(buffer),(unsigned char *) buffer);
|
||
for (y=0; y < (ssize_t) image->rows; y++)
|
||
{
|
||
p=GetVirtualPixels(image,0,y,image->columns,1,&image->exception);
|
||
if (p == (const PixelPacket *) NULL)
|
||
break;
|
||
for (x=0; x < (ssize_t) image->columns; x++)
|
||
{
|
||
byte>>=1;
|
||
if (GetPixelLuma(image,p) < (QuantumRange/2.0))
|
||
byte|=0x80;
|
||
bit++;
|
||
if (bit == 8)
|
||
{
|
||
/*
|
||
Write a bitmap byte to the image file.
|
||
*/
|
||
(void) FormatLocaleString(buffer,MaxTextExtent,"0x%02X, ",
|
||
(unsigned int) (byte & 0xff));
|
||
(void) WriteBlob(image,strlen(buffer),(unsigned char *) buffer);
|
||
count++;
|
||
if (count == 12)
|
||
{
|
||
(void) CopyMagickString(buffer,"\n ",MaxTextExtent);
|
||
(void) WriteBlob(image,strlen(buffer),(unsigned char *) buffer);
|
||
count=0;
|
||
};
|
||
bit=0;
|
||
byte=0;
|
||
}
|
||
p++;
|
||
}
|
||
if (bit != 0)
|
||
{
|
||
/*
|
||
Write a bitmap byte to the image file.
|
||
*/
|
||
byte>>=(8-bit);
|
||
(void) FormatLocaleString(buffer,MaxTextExtent,"0x%02X, ",
|
||
(unsigned int) (byte & 0xff));
|
||
(void) WriteBlob(image,strlen(buffer),(unsigned char *) buffer);
|
||
count++;
|
||
if (count == 12)
|
||
{
|
||
(void) CopyMagickString(buffer,"\n ",MaxTextExtent);
|
||
(void) WriteBlob(image,strlen(buffer),(unsigned char *) buffer);
|
||
count=0;
|
||
};
|
||
bit=0;
|
||
byte=0;
|
||
};
|
||
status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
|
||
image->rows);
|
||
if (status == MagickFalse)
|
||
break;
|
||
}
|
||
(void) CopyMagickString(buffer,"};\n",MaxTextExtent);
|
||
(void) WriteBlob(image,strlen(buffer),(unsigned char *) buffer);
|
||
(void) CloseBlob(image);
|
||
return(MagickTrue);
|
||
}
|