forked from openkylin/imagemagick
509 lines
17 KiB
C
509 lines
17 KiB
C
/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% V V IIIII CCCC AAA RRRR %
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% V V I C A A R R %
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% V V I C AAAAA RRRR %
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% V V I C A A R R %
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% V IIIII CCCC A A R R %
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% %
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% %
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% Read/Write VICAR Rasterfile 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/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/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/constitute.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/module.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/string-private.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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WriteVICARImage(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 V I C A R %
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% %
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% %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% IsVICAR() returns MagickTrue if the image format type, identified by the
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% magick string, is VICAR.
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%
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% The format of the IsVICAR method is:
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%
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% MagickBooleanType IsVICAR(const unsigned char *magick,
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% 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 IsVICAR(const unsigned char *magick,
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const size_t length)
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{
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if (length < 14)
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return(MagickFalse);
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if (LocaleNCompare((const char *) magick,"LBLSIZE",7) == 0)
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return(MagickTrue);
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if (LocaleNCompare((const char *) magick,"NJPL1I",6) == 0)
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return(MagickTrue);
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if (LocaleNCompare((const char *) magick,"PDS_VERSION_ID",14) == 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 V I C A R 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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% ReadVICARImage() reads a VICAR 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 ReadVICARImage method is:
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%
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% Image *ReadVICARImage(const ImageInfo *image_info,
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% 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: Method ReadVICARImage returns a pointer to the image after
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% reading. A null image is returned if there is a memory shortage or if
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% the image cannot be read.
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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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*/
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static Image *ReadVICARImage(const ImageInfo *image_info,
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ExceptionInfo *exception)
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{
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char
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keyword[MaxTextExtent],
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value[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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value_expected;
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QuantumInfo
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*quantum_info;
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QuantumType
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quantum_type;
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PixelPacket
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*q;
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size_t
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length;
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ssize_t
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count,
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y;
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unsigned char
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*pixels;
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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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Decode image header.
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*/
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c=ReadBlobByte(image);
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count=1;
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if (c == EOF)
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{
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image=DestroyImage(image);
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return((Image *) NULL);
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}
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length=0;
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image->columns=0;
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image->rows=0;
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while (isgraph((int) ((unsigned char) c)) && ((image->columns == 0) || (image->rows == 0)))
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{
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if (isalnum((int) ((unsigned char) c)) == MagickFalse)
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{
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c=ReadBlobByte(image);
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count++;
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}
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else
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{
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char
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*p;
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/*
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Determine a keyword and its value.
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*/
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p=keyword;
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do
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{
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if ((size_t) (p-keyword) < (MaxTextExtent-1))
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*p++=c;
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c=ReadBlobByte(image);
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count++;
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} while (isalnum((int) ((unsigned char) c)) || (c == '_'));
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*p='\0';
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value_expected=MagickFalse;
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while ((isspace((int) ((unsigned char) c)) != 0) || (c == '='))
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{
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if (c == '=')
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value_expected=MagickTrue;
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c=ReadBlobByte(image);
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count++;
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}
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if (value_expected == MagickFalse)
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continue;
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p=value;
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while (isalnum((int) ((unsigned char) c)))
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{
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if ((size_t) (p-value) < (MaxTextExtent-1))
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*p++=c;
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c=ReadBlobByte(image);
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count++;
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}
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*p='\0';
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/*
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Assign a value to the specified keyword.
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*/
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if (LocaleCompare(keyword,"LABEL_RECORDS") == 0)
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length*=(ssize_t) StringToLong(value);
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if (LocaleCompare(keyword,"LBLSIZE") == 0)
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length=(ssize_t) StringToLong(value);
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if (LocaleCompare(keyword,"RECORD_BYTES") == 0)
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{
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image->columns=StringToUnsignedLong(value);
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length=(ssize_t) image->columns;
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}
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if (LocaleCompare(keyword,"NS") == 0)
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image->columns=StringToUnsignedLong(value);
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if (LocaleCompare(keyword,"LINES") == 0)
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image->rows=StringToUnsignedLong(value);
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if (LocaleCompare(keyword,"NL") == 0)
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image->rows=StringToUnsignedLong(value);
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}
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while (isspace((int) ((unsigned char) c)) != 0)
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{
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c=ReadBlobByte(image);
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count++;
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}
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}
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while (count < (ssize_t) length)
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{
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c=ReadBlobByte(image);
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if (c == EOF)
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break;
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count++;
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}
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if ((image->columns == 0) || (image->rows == 0))
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ThrowReaderException(CorruptImageError,"NegativeOrZeroImageSize");
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image->depth=8;
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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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Read VICAR pixels.
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*/
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(void) SetImageColorspace(image,GRAYColorspace);
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quantum_type=GrayQuantum;
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quantum_info=AcquireQuantumInfo(image_info,image);
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if (quantum_info == (QuantumInfo *) NULL)
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ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
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length=GetQuantumExtent(image,quantum_info,quantum_type);
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pixels=GetQuantumPixels(quantum_info);
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for (y=0; y < (ssize_t) image->rows; y++)
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{
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const void
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*stream;
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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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stream=ReadBlobStream(image,length,pixels,&count);
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if (count != (ssize_t) length)
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break;
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(void) ImportQuantumPixels(image,(CacheView *) NULL,quantum_info,
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quantum_type,(unsigned char *) stream,exception);
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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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SetQuantumImageType(image,quantum_type);
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quantum_info=DestroyQuantumInfo(quantum_info);
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if (EOFBlob(image) != MagickFalse)
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ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
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image->filename);
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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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% %
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% %
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% R e g i s t e r V I C A R 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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% RegisterVICARImage() adds attributes for the VICAR 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
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% description of the format.
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%
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% The format of the RegisterVICARImage method is:
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%
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% size_t RegisterVICARImage(void)
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%
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*/
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ModuleExport size_t RegisterVICARImage(void)
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{
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MagickInfo
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*entry;
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entry=SetMagickInfo("VICAR");
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entry->decoder=(DecodeImageHandler *) ReadVICARImage;
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entry->encoder=(EncodeImageHandler *) WriteVICARImage;
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entry->magick=(IsImageFormatHandler *) IsVICAR;
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entry->adjoin=MagickFalse;
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entry->description=ConstantString("VICAR rasterfile format");
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entry->magick_module=ConstantString("VICAR");
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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 V I C A R 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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% UnregisterVICARImage() removes format registrations made by the
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% VICAR module from the list of supported formats.
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%
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% The format of the UnregisterVICARImage method is:
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%
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% UnregisterVICARImage(void)
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%
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*/
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ModuleExport void UnregisterVICARImage(void)
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{
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(void) UnregisterMagickInfo("VICAR");
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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 V I C A R 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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% WriteVICARImage() writes an image in the VICAR rasterfile format.
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% Vicar files contain a text header, followed by one or more planes of binary
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% grayscale image data. Vicar files are designed to allow many planes to be
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% stacked together to form image cubes. This method only writes a single
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% grayscale plane.
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%
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% WriteVICARImage was written contributed by gorelick@esther.la.asu.edu.
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%
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% The format of the WriteVICARImage method is:
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%
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% MagickBooleanType WriteVICARImage(const ImageInfo *image_info,
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% Image *image)
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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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*/
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static MagickBooleanType WriteVICARImage(const ImageInfo *image_info,
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Image *image)
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{
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char
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header[MaxTextExtent];
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int
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y;
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MagickBooleanType
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status;
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QuantumInfo
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*quantum_info;
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const PixelPacket
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*p;
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size_t
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length;
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ssize_t
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count;
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unsigned char
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*pixels;
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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 (image->debug != MagickFalse)
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(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
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status=OpenBlob(image_info,image,WriteBinaryBlobMode,&image->exception);
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if (status == MagickFalse)
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return(status);
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(void) TransformImageColorspace(image,sRGBColorspace);
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/*
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Write header.
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*/
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(void) memset(header,' ',MaxTextExtent);
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(void) FormatLocaleString(header,MaxTextExtent,
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"LBLSIZE=%.20g FORMAT='BYTE' TYPE='IMAGE' BUFSIZE=20000 DIM=2 EOL=0 "
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"RECSIZE=%.20g ORG='BSQ' NL=%.20g NS=%.20g NB=1 N1=0 N2=0 N3=0 N4=0 NBB=0 "
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"NLB=0 TASK='ImageMagick'",(double) MaxTextExtent,(double) image->columns,
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(double) image->rows,(double) image->columns);
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(void) WriteBlob(image,MaxTextExtent,(unsigned char *) header);
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/*
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Write VICAR pixels.
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*/
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image->depth=8;
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quantum_info=AcquireQuantumInfo(image_info,image);
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if (quantum_info == (QuantumInfo *) NULL)
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ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
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pixels=GetQuantumPixels(quantum_info);
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for (y=0; y < (ssize_t) image->rows; y++)
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{
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p=GetVirtualPixels(image,0,y,image->columns,1,&image->exception);
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if (p == (const PixelPacket *) NULL)
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break;
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length=ExportQuantumPixels(image,(const CacheView *) NULL,quantum_info,
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GrayQuantum,pixels,&image->exception);
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count=WriteBlob(image,length,pixels);
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if (count != (ssize_t) length)
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break;
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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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quantum_info=DestroyQuantumInfo(quantum_info);
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(void) CloseBlob(image);
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return(MagickTrue);
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}
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