/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% V V IIIII CCCC AAA RRRR %
% V V I C A A R R %
% V V I C AAAAA RRRR %
% V V I C A A R R %
% V IIIII CCCC A A R R %
% %
% %
% Read/Write VICAR Rasterfile Format. %
% %
% Software Design %
% John Cristy %
% July 1992 %
% %
% %
% Copyright 1999-2007 ImageMagick Studio LLC, a non-profit organization %
% dedicated to making software imaging solutions freely available. %
% %
% You may not use this file except in compliance with the License. You may %
% obtain a copy of the License at %
% %
% http://www.imagemagick.org/script/license.php %
% %
% Unless required by applicable law or agreed to in writing, software %
% distributed under the License is distributed on an "AS IS" BASIS, %
% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %
% See the License for the specific language governing permissions and %
% limitations under the License. %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%
*/
/*
Include declarations.
*/
#include "magick/studio.h"
#include "magick/blob.h"
#include "magick/blob-private.h"
#include "magick/colorspace.h"
#include "magick/constitute.h"
#include "magick/exception.h"
#include "magick/exception-private.h"
#include "magick/image.h"
#include "magick/image-private.h"
#include "magick/list.h"
#include "magick/magick.h"
#include "magick/memory_.h"
#include "magick/monitor.h"
#include "magick/quantum-private.h"
#include "magick/quantum-private.h"
#include "magick/static.h"
#include "magick/string_.h"
#include "magick/module.h"
/*
Forward declarations.
*/
static MagickBooleanType
WriteVICARImage(const ImageInfo *,Image *);
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% I s V I C A R %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% IsVICAR() returns MagickTrue if the image format type, identified by the
% magick string, is VICAR.
%
% The format of the IsVICAR method is:
%
% MagickBooleanType IsVICAR(const unsigned char *magick,
% const size_t length)
%
% A description of each parameter follows:
%
% o magick: This string is generally the first few bytes of an image file
% or blob.
%
% o length: Specifies the length of the magick string.
%
%
*/
static MagickBooleanType IsVICAR(const unsigned char *magick,
const size_t length)
{
if (length < 14)
return(MagickFalse);
if (LocaleNCompare((char *) magick,"LBLSIZE",7) == 0)
return(MagickTrue);
if (LocaleNCompare((char *) magick,"NJPL1I",6) == 0)
return(MagickTrue);
if (LocaleNCompare((char *) magick,"PDS_VERSION_ID",14) == 0)
return(MagickTrue);
return(MagickFalse);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e a d V I C A R I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ReadVICARImage() reads a VICAR image file and returns it. It
% allocates the memory necessary for the new Image structure and returns a
% pointer to the new image.
%
% The format of the ReadVICARImage method is:
%
% Image *ReadVICARImage(const ImageInfo *image_info,
% ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o image: Method ReadVICARImage returns a pointer to the image after
% reading. A null image is returned if there is a memory shortage or if
% the image cannot be read.
%
% o image_info: The image info.
%
% o exception: return any errors or warnings in this structure.
%
%
*/
static Image *ReadVICARImage(const ImageInfo *image_info,
ExceptionInfo *exception)
{
char
keyword[MaxTextExtent],
value[MaxTextExtent];
Image
*image;
int
c;
long
y;
MagickBooleanType
status,
value_expected;
QuantumInfo
quantum_info;
register PixelPacket
*q;
ssize_t
count;
ssize_t
length;
unsigned char
*scanline;
/*
Open image file.
*/
assert(image_info != (const ImageInfo *) NULL);
assert(image_info->signature == MagickSignature);
if (image_info->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
image_info->filename);
assert(exception != (ExceptionInfo *) NULL);
assert(exception->signature == MagickSignature);
image=AllocateImage(image_info);
status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
if (status == MagickFalse)
{
image=DestroyImageList(image);
return((Image *) NULL);
}
/*
Decode image header.
*/
c=ReadBlobByte(image);
count=1;
if (c == EOF)
{
image=DestroyImage(image);
return((Image *) NULL);
}
length=0;
image->columns=0;
image->rows=0;
while (isgraph(c) && ((image->columns == 0) || (image->rows == 0)))
{
if (isalnum(c) == MagickFalse)
{
c=ReadBlobByte(image);
count++;
}
else
{
register char
*p;
/*
Determine a keyword and its value.
*/
p=keyword;
do
{
if ((size_t) (p-keyword) < (MaxTextExtent/2))
*p++=c;
c=ReadBlobByte(image);
count++;
} while (isalnum(c) || (c == '_'));
*p='\0';
value_expected=MagickFalse;
while ((isspace((int) ((unsigned char) c)) != 0) || (c == '='))
{
if (c == '=')
value_expected=MagickTrue;
c=ReadBlobByte(image);
count++;
}
if (value_expected == MagickFalse)
continue;
p=value;
while (isalnum(c))
{
if ((size_t) (p-value) < (MaxTextExtent/2))
*p++=c;
c=ReadBlobByte(image);
count++;
}
*p='\0';
/*
Assign a value to the specified keyword.
*/
if (LocaleCompare(keyword,"Label_RECORDS") == 0)
length=(ssize_t) atol(value);
if (LocaleCompare(keyword,"LBLSIZE") == 0)
length=(ssize_t) atol(value);
if (LocaleCompare(keyword,"RECORD_BYTES") == 0)
image->columns=1UL*atol(value);
if (LocaleCompare(keyword,"NS") == 0)
image->columns=1UL*atol(value);
if (LocaleCompare(keyword,"LINES") == 0)
image->rows=1UL*atol(value);
if (LocaleCompare(keyword,"NL") == 0)
image->rows=1UL*atol(value);
}
while (isspace((int) ((unsigned char) c)) != 0)
{
c=ReadBlobByte(image);
count++;
}
}
while (count < (ssize_t) length)
{
c=ReadBlobByte(image);
count++;
}
if ((image->columns == 0) || (image->rows == 0))
ThrowReaderException(CorruptImageError,"NegativeOrZeroImageSize");
image->depth=8;
if (AllocateImageColormap(image,256) == MagickFalse)
ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
if (image_info->ping != MagickFalse)
{
CloseBlob(image);
return(GetFirstImageInList(image));
}
/*
Read VICAR pixels.
*/
if (SetImageExtent(image,0,0) == MagickFalse)
{
InheritException(exception,&image->exception);
return(DestroyImageList(image));
}
GetQuantumInfo(image_info,&quantum_info);
scanline=(unsigned char *) AcquireQuantumMemory(image->columns,
sizeof(*scanline));
if (scanline == (unsigned char *) NULL)
ThrowReaderException(CorruptImageError,"UnableToReadImageData");
for (y=0; y < (long) image->rows; y++)
{
q=SetImagePixels(image,0,y,image->columns,1);
if (q == (PixelPacket *) NULL)
break;
count=ReadBlob(image,image->columns,scanline);
(void) ExportQuantumPixels(image,&quantum_info,GrayQuantum,scanline);
if (SyncImagePixels(image) == MagickFalse)
break;
if ((image->progress_monitor != (MagickProgressMonitor) NULL) &&
(QuantumTick(y,image->rows) != MagickFalse))
{
status=image->progress_monitor(LoadImageTag,y,image->rows,
image->client_data);
if (status == MagickFalse)
break;
}
}
scanline=(unsigned char *) RelinquishMagickMemory(scanline);
if (EOFBlob(image) != MagickFalse)
ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
image->filename);
CloseBlob(image);
return(GetFirstImageInList(image));
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e g i s t e r V I C A R I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% RegisterVICARImage() adds attributes for the VICAR image format to
% the list of supported formats. The attributes include the image format
% tag, a method to read and/or write the format, whether the format
% supports the saving of more than one frame to the same file or blob,
% whether the format supports native in-memory I/O, and a brief
% description of the format.
%
% The format of the RegisterVICARImage method is:
%
% unsigned long RegisterVICARImage(void)
%
*/
ModuleExport unsigned long RegisterVICARImage(void)
{
MagickInfo
*entry;
entry=SetMagickInfo("VICAR");
entry->decoder=(DecodeImageHandler *) ReadVICARImage;
entry->encoder=(EncodeImageHandler *) WriteVICARImage;
entry->magick=(IsImageFormatHandler *) IsVICAR;
entry->adjoin=MagickFalse;
entry->description=ConstantString("VICAR rasterfile format");
entry->module=ConstantString("VICAR");
(void) RegisterMagickInfo(entry);
return(MagickImageCoderSignature);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% U n r e g i s t e r V I C A R I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% UnregisterVICARImage() removes format registrations made by the
% VICAR module from the list of supported formats.
%
% The format of the UnregisterVICARImage method is:
%
% UnregisterVICARImage(void)
%
*/
ModuleExport void UnregisterVICARImage(void)
{
(void) UnregisterMagickInfo("VICAR");
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% W r i t e V I C A R I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% WriteVICARImage() writes an image in the VICAR rasterfile format.
% Vicar files contain a text header, followed by one or more planes of binary
% grayscale image data. Vicar files are designed to allow many planes to be
% stacked together to form image cubes. This method only writes a single
% grayscale plane.
%
% WriteVICARImage was written contributed by
% [email protected].
%
% The format of the WriteVICARImage method is:
%
% MagickBooleanType WriteVICARImage(const ImageInfo *image_info,
% Image *image)
%
% A description of each parameter follows.
%
% o image_info: The image info.
%
% o image: The image.
%
%
*/
static MagickBooleanType WriteVICARImage(const ImageInfo *image_info,
Image *image)
{
char
header[MaxTextExtent];
int
y;
MagickBooleanType
status;
QuantumInfo
quantum_info;
register const PixelPacket
*p;
unsigned char
*scanline;
/*
Open output image file.
*/
assert(image_info != (const ImageInfo *) NULL);
assert(image_info->signature == MagickSignature);
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
status=OpenBlob(image_info,image,WriteBinaryBlobMode,&image->exception);
if (status == MagickFalse)
return(status);
if (image_info->colorspace == UndefinedColorspace)
(void) SetImageColorspace(image,RGBColorspace);
/*
Write header.
*/
(void) ResetMagickMemory(header,' ',MaxTextExtent);
(void) FormatMagickString(header,MaxTextExtent,
"LBLSIZE=%lu FORMAT='BYTE' TYPE='IMAGE' BUFSIZE=20000 DIM=2 EOL=0 "
"RECSIZE=%lu ORG='BSQ' NL=%lu NS=%lu NB=1 N1=0 N2=0 N3=0 N4=0 NBB=0 "
"NLB=0 TASK='ImageMagick'",(unsigned long) MaxTextExtent,image->columns,
image->rows,image->columns);
(void) WriteBlob(image,MaxTextExtent,(unsigned char *) header);
/*
Allocate memory for scanline.
*/
scanline=(unsigned char *) AcquireQuantumMemory(image->columns,
sizeof(*scanline));
if (scanline == (unsigned char *) NULL)
ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
/*
Write VICAR scanline.
*/
GetQuantumInfo(image_info,&quantum_info);
image->depth=8;
for (y=0; y < (long) image->rows; y++)
{
p=AcquireImagePixels(image,0,y,image->columns,1,&image->exception);
if (p == (const PixelPacket *) NULL)
break;
(void) ImportQuantumPixels(image,&quantum_info,GrayQuantum,scanline);
(void) WriteBlob(image,image->columns,scanline);
if (image->previous == (Image *) NULL)
if ((image->progress_monitor != (MagickProgressMonitor) NULL) &&
(QuantumTick(y,image->rows) != MagickFalse))
{
status=image->progress_monitor(SaveImageTag,y,image->rows,
image->client_data);
if (status == MagickFalse)
break;
}
}
scanline=(unsigned char *) RelinquishMagickMemory(scanline);
CloseBlob(image);
return(MagickTrue);
}
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