/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% W r i t e F I T S I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% WriteFITSImage() writes a Flexible Image Transport System image to a
% file as gray scale intensities [0..255].
%
% The format of the WriteFITSImage method is:
%
% MagickBooleanType WriteFITSImage(const ImageInfo *image_info,
% Image *image)
%
% A description of each parameter follows.
%
% o image_info: the image info.
%
% o image: The image.
%
*/
static MagickBooleanType WriteFITSImage(const ImageInfo *image_info,
Image *image)
{
char
header[FITSBlocksize],
*fits_info;
MagickBooleanType
status;
QuantumInfo
*quantum_info;
register const PixelPacket
*p;
size_t
length;
ssize_t
count,
offset,
y;
unsigned char
*pixels;
/*
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 (IsRGBColorspace(image->colorspace) == MagickFalse)
(void) TransformImageColorspace(image,RGBColorspace);
/*
Allocate image memory.
*/
fits_info=(char *) AcquireQuantumMemory(FITSBlocksize,sizeof(*fits_info));
if (fits_info == (char *) NULL)
ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
(void) ResetMagickMemory(fits_info,' ',FITSBlocksize*sizeof(*fits_info));
/*
Initialize image header.
*/
image->depth=GetImageQuantumDepth(image,MagickFalse);
quantum_info=AcquireQuantumInfo((const ImageInfo *) NULL,image);
if (quantum_info == (QuantumInfo *) NULL)
ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
offset=0;
(void) FormatLocaleString(header,FITSBlocksize,
"SIMPLE = T");
(void) strncpy(fits_info+offset,header,strlen(header));
offset+=80;
(void) FormatLocaleString(header,FITSBlocksize,"BITPIX = %10ld",
(long) (quantum_info->format == FloatingPointQuantumFormat ? -1 : 1)*
image->depth);
(void) strncpy(fits_info+offset,header,strlen(header));
offset+=80;
(void) FormatLocaleString(header,FITSBlocksize,"NAXIS = %10lu",
IsGrayImage(image,&image->exception) != MagickFalse ? 2UL : 3UL);
(void) strncpy(fits_info+offset,header,strlen(header));
offset+=80;
(void) FormatLocaleString(header,FITSBlocksize,"NAXIS1 = %10lu",
(unsigned long) image->columns);
(void) strncpy(fits_info+offset,header,strlen(header));
offset+=80;
(void) FormatLocaleString(header,FITSBlocksize,"NAXIS2 = %10lu",
(unsigned long) image->rows);
(void) strncpy(fits_info+offset,header,strlen(header));
offset+=80;
if (IsGrayImage(image,&image->exception) == MagickFalse)
{
(void) FormatLocaleString(header,FITSBlocksize,
"NAXIS3 = %10lu",3UL);
(void) strncpy(fits_info+offset,header,strlen(header));
offset+=80;
}
(void) FormatLocaleString(header,FITSBlocksize,"BSCALE = %E",1.0);
(void) strncpy(fits_info+offset,header,strlen(header));
offset+=80;
(void) FormatLocaleString(header,FITSBlocksize,"BZERO = %E",
image->depth > 8 ? GetFITSPixelRange(image->depth) : 0.0);
(void) strncpy(fits_info+offset,header,strlen(header));
offset+=80;
(void) FormatLocaleString(header,FITSBlocksize,"DATAMAX = %E",
1.0*((MagickOffsetType) GetQuantumRange(image->depth)));
(void) strncpy(fits_info+offset,header,strlen(header));
offset+=80;
(void) FormatLocaleString(header,FITSBlocksize,"DATAMIN = %E",0.0);
(void) strncpy(fits_info+offset,header,strlen(header));
offset+=80;
if (image->endian == LSBEndian)
{
(void) FormatLocaleString(header,FITSBlocksize,"XENDIAN = 'SMALL'");
(void) strncpy(fits_info+offset,header,strlen(header));
offset+=80;
}
(void) FormatLocaleString(header,FITSBlocksize,"HISTORY %.72s",
GetMagickVersion((size_t *) NULL));
(void) strncpy(fits_info+offset,header,strlen(header));
offset+=80;
(void) strncpy(header,"END",FITSBlocksize);
(void) strncpy(fits_info+offset,header,strlen(header));
offset+=80;
(void) WriteBlob(image,FITSBlocksize,(unsigned char *) fits_info);
/*
Convert image to fits scale PseudoColor class.
*/
pixels=GetQuantumPixels(quantum_info);
if (IsGrayImage(image,&image->exception) != MagickFalse)
{
length=GetQuantumExtent(image,quantum_info,GrayQuantum);
for (y=(ssize_t) image->rows-1; y >= 0; y--)
{
p=GetVirtualPixels(image,0,y,image->columns,1,&image->exception);
if (p == (const PixelPacket *) NULL)
break;
length=ExportQuantumPixels(image,(const CacheView *) NULL,quantum_info,
GrayQuantum,pixels,&image->exception);
if (image->depth == 16)
SetFITSUnsignedPixels(image->columns,image->depth,pixels);
if (((image->depth == 32) || (image->depth == 64)) &&
(quantum_info->format != FloatingPointQuantumFormat))
SetFITSUnsignedPixels(image->columns,image->depth,pixels);
count=WriteBlob(image,length,pixels);
if (count != (ssize_t) length)
break;
status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
image->rows);
if (status == MagickFalse)
break;
}
}
else
{
length=GetQuantumExtent(image,quantum_info,RedQuantum);
for (y=(ssize_t) image->rows-1; y >= 0; y--)
{
p=GetVirtualPixels(image,0,y,image->columns,1,&image->exception);
if (p == (const PixelPacket *) NULL)
break;
length=ExportQuantumPixels(image,(const CacheView *) NULL,quantum_info,
RedQuantum,pixels,&image->exception);
if (image->depth == 16)
SetFITSUnsignedPixels(image->columns,image->depth,pixels);
if (((image->depth == 32) || (image->depth == 64)) &&
(quantum_info->format != FloatingPointQuantumFormat))
SetFITSUnsignedPixels(image->columns,image->depth,pixels);
count=WriteBlob(image,length,pixels);
if (count != (ssize_t) length)
break;
status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
image->rows);
if (status == MagickFalse)
break;
}
length=GetQuantumExtent(image,quantum_info,GreenQuantum);
for (y=(ssize_t) image->rows-1; y >= 0; y--)
{
p=GetVirtualPixels(image,0,y,image->columns,1,&image->exception);
if (p == (const PixelPacket *) NULL)
break;
length=ExportQuantumPixels(image,(const CacheView *) NULL,quantum_info,
GreenQuantum,pixels,&image->exception);
if (image->depth == 16)
SetFITSUnsignedPixels(image->columns,image->depth,pixels);
if (((image->depth == 32) || (image->depth == 64)) &&
(quantum_info->format != FloatingPointQuantumFormat))
SetFITSUnsignedPixels(image->columns,image->depth,pixels);
count=WriteBlob(image,length,pixels);
if (count != (ssize_t) length)
break;
status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
image->rows);
if (status == MagickFalse)
break;
}
length=GetQuantumExtent(image,quantum_info,BlueQuantum);
for (y=(ssize_t) image->rows-1; y >= 0; y--)
{
p=GetVirtualPixels(image,0,y,image->columns,1,&image->exception);
if (p == (const PixelPacket *) NULL)
break;
length=ExportQuantumPixels(image,(const CacheView *) NULL,quantum_info,
BlueQuantum,pixels,&image->exception);
if (image->depth == 16)
SetFITSUnsignedPixels(image->columns,image->depth,pixels);
if (((image->depth == 32) || (image->depth == 64)) &&
(quantum_info->format != FloatingPointQuantumFormat))
SetFITSUnsignedPixels(image->columns,image->depth,pixels);
count=WriteBlob(image,length,pixels);
if (count != (ssize_t) length)
break;
status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
image->rows);
if (status == MagickFalse)
break;
}
}
quantum_info=DestroyQuantumInfo(quantum_info);
length=(size_t) (FITSBlocksize-TellBlob(image) % FITSBlocksize);
if (length != 0)
{
(void) ResetMagickMemory(fits_info,0,length*sizeof(*fits_info));
(void) WriteBlob(image,length,(unsigned char *) fits_info);
}
fits_info=DestroyString(fits_info);
(void) CloseBlob(image);
return(MagickTrue);
}
static Image *ReadFITSImage(const ImageInfo *image_info,
ExceptionInfo *exception)
{
typedef struct _FITSInfo
{
MagickBooleanType
extend,
simple;
int
bits_per_pixel,
columns,
rows,
number_axes,
number_planes;
double
min_data,
max_data,
zero,
scale;
EndianType
endian;
} FITSInfo;
char
*comment,
keyword[9],
property[MaxTextExtent],
value[73];
double
pixel,
scale;
FITSInfo
fits_info;
Image
*image;
int
c;
MagickBooleanType
status;
MagickSizeType
number_pixels;
register ssize_t
i,
x;
register PixelPacket
*q;
ssize_t
count,
scene,
y;
/*
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=AcquireImage(image_info);
status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
if (status == MagickFalse)
{
image=DestroyImageList(image);
return((Image *) NULL);
}
/*
Initialize image header.
*/
(void) ResetMagickMemory(&fits_info,0,sizeof(fits_info));
fits_info.extend=MagickFalse;
fits_info.simple=MagickFalse;
fits_info.bits_per_pixel=8;
fits_info.columns=1;
fits_info.rows=1;
fits_info.rows=1;
fits_info.number_planes=1;
fits_info.min_data=0.0;
fits_info.max_data=0.0;
fits_info.zero=0.0;
fits_info.scale=1.0;
fits_info.endian=MSBEndian;
/*
Decode image header.
*/
for (comment=(char *) NULL; EOFBlob(image) == MagickFalse; )
{
for ( ; EOFBlob(image) == MagickFalse; )
{
register char
*p;
count=ReadBlob(image,8,(unsigned char *) keyword);
if (count != 8)
break;
for (i=0; i < 8; i++)
{
if (isspace((int) ((unsigned char) keyword[i])) != 0)
break;
keyword[i]=tolower((int) ((unsigned char) keyword[i]));
}
keyword[i]='\0';
count=ReadBlob(image,72,(unsigned char *) value);
if (count != 72)
break;
value[72]='\0';
p=value;
if (*p == '=')
{
p+=2;
while (isspace((int) ((unsigned char) *p)) != 0)
p++;
}
if (LocaleCompare(keyword,"end") == 0)
break;
if (LocaleCompare(keyword,"extend") == 0)
fits_info.extend=(*p == 'T') || (*p == 't') ? MagickTrue : MagickFalse;
if (LocaleCompare(keyword,"simple") == 0)
fits_info.simple=(*p == 'T') || (*p == 't') ? MagickTrue : MagickFalse;
if (LocaleCompare(keyword,"bitpix") == 0)
fits_info.bits_per_pixel=StringToLong(p);
if (LocaleCompare(keyword,"naxis") == 0)
fits_info.number_axes=StringToLong(p);
if (LocaleCompare(keyword,"naxis1") == 0)
fits_info.columns=StringToLong(p);
if (LocaleCompare(keyword,"naxis2") == 0)
fits_info.rows=StringToLong(p);
if (LocaleCompare(keyword,"naxis3") == 0)
fits_info.number_planes=StringToLong(p);
if (LocaleCompare(keyword,"datamax") == 0)
fits_info.max_data=StringToDouble(p,(char **) NULL);
if (LocaleCompare(keyword,"datamin") == 0)
fits_info.min_data=StringToDouble(p,(char **) NULL);
if (LocaleCompare(keyword,"bzero") == 0)
fits_info.zero=StringToDouble(p,(char **) NULL);
if (LocaleCompare(keyword,"bscale") == 0)
fits_info.scale=StringToDouble(p,(char **) NULL);
if (LocaleCompare(keyword,"comment") == 0)
{
if (comment == (char *) NULL)
comment=ConstantString(p);
else
(void) ConcatenateString(&comment,p);
}
if (LocaleCompare(keyword,"xendian") == 0)
{
if (LocaleNCompare(p,"big",3) == 0)
fits_info.endian=MSBEndian;
else
fits_info.endian=LSBEndian;
}
(void) FormatLocaleString(property,MaxTextExtent,"fits:%s",keyword);
(void) SetImageProperty(image,property,p);
}
c=0;
while (((TellBlob(image) % FITSBlocksize) != 0) && (c != EOF))
c=ReadBlobByte(image);
if (fits_info.extend == MagickFalse)
break;
number_pixels=(MagickSizeType) fits_info.columns*fits_info.rows;
if ((fits_info.simple != MagickFalse) && (fits_info.number_axes >= 1) &&
(fits_info.number_axes <= 4) && (number_pixels != 0))
break;
}
/*
Verify that required image information is defined.
*/
if (comment != (char *) NULL)
{
(void) SetImageProperty(image,"comment",comment);
comment=DestroyString(comment);
}
if (EOFBlob(image) != MagickFalse)
ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
image->filename);
number_pixels=(MagickSizeType) fits_info.columns*fits_info.rows;
if ((fits_info.simple == MagickFalse) || (fits_info.number_axes < 1) ||
(fits_info.number_axes > 4) || (number_pixels == 0))
ThrowReaderException(CorruptImageError,"ImageTypeNotSupported");
for (scene=0; scene < (ssize_t) fits_info.number_planes; scene++)
{
image->columns=(size_t) fits_info.columns;
image->rows=(size_t) fits_info.rows;
image->depth=(size_t) (fits_info.bits_per_pixel < 0 ? -1 : 1)*
fits_info.bits_per_pixel;
image->endian=fits_info.endian;
image->scene=(size_t) scene;
if ((image_info->ping != MagickFalse) && (image_info->number_scenes != 0))
if (image->scene >= (image_info->scene+image_info->number_scenes-1))
break;
/*
Initialize image structure.
*/
(void) SetImageColorspace(image,GRAYColorspace);
if ((fits_info.min_data == 0.0) && (fits_info.max_data == 0.0))
{
if (fits_info.zero == 0.0)
GetFITSPixelExtrema(image,fits_info.bits_per_pixel,
&fits_info.min_data,&fits_info.max_data);
else
fits_info.max_data=GetFITSPixelRange((size_t)
fits_info.bits_per_pixel);
}
else
fits_info.max_data=GetFITSPixelRange((size_t) fits_info.bits_per_pixel);
/*
Convert FITS pixels to pixel packets.
*/
scale=QuantumRange/(fits_info.max_data-fits_info.min_data);
for (y=(ssize_t) image->rows-1; y >= 0; y--)
{
q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
if (q == (PixelPacket *) NULL)
break;
for (x=0; x < (ssize_t) image->columns; x++)
{
pixel=GetFITSPixel(image,fits_info.bits_per_pixel);
if ((image->depth == 16) || (image->depth == 32) ||
(image->depth == 64))
SetFITSUnsignedPixels(1,image->depth,image->endian,(unsigned char *)
&pixel);
SetPixelRed(q,ClampToQuantum(scale*(fits_info.scale*(pixel-
fits_info.min_data)+fits_info.zero)));
SetPixelGreen(q,GetPixelRed(q));
SetPixelBlue(q,GetPixelRed(q));
q++;
}
if (SyncAuthenticPixels(image,exception) == MagickFalse)
break;
if (image->previous == (Image *) NULL)
{
status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
image->rows);
if (status == MagickFalse)
break;
}
}
if (EOFBlob(image) != MagickFalse)
{
ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
image->filename);
break;
}
/*
Proceed to next image.
*/
if (image_info->number_scenes != 0)
if (image->scene >= (image_info->scene+image_info->number_scenes-1))
break;
if (scene < (ssize_t) (fits_info.number_planes-1))
{
/*
Allocate next image structure.
*/
AcquireNextImage(image_info,image);
if (GetNextImageInList(image) == (Image *) NULL)
{
image=DestroyImageList(image);
return((Image *) NULL);
}
image=SyncNextImageInList(image);
status=SetImageProgress(image,LoadImagesTag,TellBlob(image),
GetBlobSize(image));
if (status == MagickFalse)
break;
}
}
(void) CloseBlob(image);
return(GetFirstImageInList(image));
}
