1 /*
2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3 % %
4 % %
5 % %
6 % FFFFF IIIII TTTTT SSSSS %
7 % F I T SS %
8 % FFF I T SSS %
9 % F I T SS %
10 % F IIIII T SSSSS %
11 % %
12 % %
13 % Read/Write Flexible Image Transport System Images. %
14 % %
15 % Software Design %
16 % Cristy %
17 % July 1992 %
18 % %
19 % %
20 % Copyright 1999-2019 ImageMagick Studio LLC, a non-profit organization %
21 % dedicated to making software imaging solutions freely available. %
22 % %
23 % You may not use this file except in compliance with the License. You may %
24 % obtain a copy of the License at %
25 % %
26 % https://imagemagick.org/script/license.php %
27 % %
28 % Unless required by applicable law or agreed to in writing, software %
29 % distributed under the License is distributed on an "AS IS" BASIS, %
30 % WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %
31 % See the License for the specific language governing permissions and %
32 % limitations under the License. %
33 % %
34 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
35 %
36 %
37 */
38
39 /*
40 Include declarations.
41 */
42 #include "MagickCore/studio.h"
43 #include "MagickCore/attribute.h"
44 #include "MagickCore/blob.h"
45 #include "MagickCore/blob-private.h"
46 #include "MagickCore/cache.h"
47 #include "MagickCore/color-private.h"
48 #include "MagickCore/colorspace.h"
49 #include "MagickCore/colorspace-private.h"
50 #include "MagickCore/constitute.h"
51 #include "MagickCore/exception.h"
52 #include "MagickCore/exception-private.h"
53 #include "MagickCore/image.h"
54 #include "MagickCore/image-private.h"
55 #include "MagickCore/list.h"
56 #include "MagickCore/magick.h"
57 #include "MagickCore/memory_.h"
58 #include "MagickCore/module.h"
59 #include "MagickCore/monitor.h"
60 #include "MagickCore/monitor-private.h"
61 #include "MagickCore/pixel-accessor.h"
62 #include "MagickCore/property.h"
63 #include "MagickCore/quantum-private.h"
64 #include "MagickCore/static.h"
65 #include "MagickCore/statistic.h"
66 #include "MagickCore/string_.h"
67 #include "MagickCore/string-private.h"
68 #include "MagickCore/module.h"
69
70 /*
71 Forward declarations.
72 */
73 #define FITSBlocksize 2880UL
74
75 /*
76 Forward declarations.
77 */
78 static MagickBooleanType
79 WriteFITSImage(const ImageInfo *,Image *,ExceptionInfo *);
80
81 /*
82 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
83 % %
84 % %
85 % %
86 % I s F I T S %
87 % %
88 % %
89 % %
90 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
91 %
92 % IsFITS() returns MagickTrue if the image format type, identified by the
93 % magick string, is FITS.
94 %
95 % The format of the IsFITS method is:
96 %
97 % MagickBooleanType IsFITS(const unsigned char *magick,const size_t length)
98 %
99 % A description of each parameter follows:
100 %
101 % o magick: compare image format pattern against these bytes.
102 %
103 % o length: Specifies the length of the magick string.
104 %
105 */
IsFITS(const unsigned char * magick,const size_t length)106 static MagickBooleanType IsFITS(const unsigned char *magick,const size_t length)
107 {
108 if (length < 6)
109 return(MagickFalse);
110 if (LocaleNCompare((const char *) magick,"IT0",3) == 0)
111 return(MagickTrue);
112 if (LocaleNCompare((const char *) magick,"SIMPLE",6) == 0)
113 return(MagickTrue);
114 return(MagickFalse);
115 }
116
117 /*
118 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
119 % %
120 % %
121 % %
122 % R e a d F I T S I m a g e %
123 % %
124 % %
125 % %
126 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
127 %
128 % ReadFITSImage() reads a FITS image file and returns it. It allocates the
129 % memory necessary for the new Image structure and returns a pointer to the
130 % new image.
131 %
132 % The format of the ReadFITSImage method is:
133 %
134 % Image *ReadFITSImage(const ImageInfo *image_info,
135 % ExceptionInfo *exception)
136 %
137 % A description of each parameter follows:
138 %
139 % o image_info: the image info.
140 %
141 % o exception: return any errors or warnings in this structure.
142 %
143 */
144
GetFITSPixel(Image * image,int bits_per_pixel)145 static inline double GetFITSPixel(Image *image,int bits_per_pixel)
146 {
147 switch (image->depth >> 3)
148 {
149 case 1:
150 return((double) ReadBlobByte(image));
151 case 2:
152 return((double) ((short) ReadBlobShort(image)));
153 case 4:
154 {
155 if (bits_per_pixel > 0)
156 return((double) ReadBlobSignedLong(image));
157 return((double) ReadBlobFloat(image));
158 }
159 case 8:
160 {
161 if (bits_per_pixel > 0)
162 return((double) ((MagickOffsetType) ReadBlobLongLong(image)));
163 }
164 default:
165 break;
166 }
167 return(ReadBlobDouble(image));
168 }
169
GetFITSPixelExtrema(Image * image,const int bits_per_pixel,double * minima,double * maxima)170 static MagickOffsetType GetFITSPixelExtrema(Image *image,
171 const int bits_per_pixel,double *minima,double *maxima)
172 {
173 double
174 pixel;
175
176 MagickOffsetType
177 offset;
178
179 MagickSizeType
180 number_pixels;
181
182 register MagickOffsetType
183 i;
184
185 offset=TellBlob(image);
186 if (offset == -1)
187 return(-1);
188 number_pixels=(MagickSizeType) image->columns*image->rows;
189 *minima=GetFITSPixel(image,bits_per_pixel);
190 *maxima=(*minima);
191 for (i=1; i < (MagickOffsetType) number_pixels; i++)
192 {
193 pixel=GetFITSPixel(image,bits_per_pixel);
194 if (pixel < *minima)
195 *minima=pixel;
196 if (pixel > *maxima)
197 *maxima=pixel;
198 }
199 return(SeekBlob(image,offset,SEEK_SET));
200 }
201
GetFITSPixelRange(const size_t depth)202 static inline double GetFITSPixelRange(const size_t depth)
203 {
204 return((double) ((MagickOffsetType) GetQuantumRange(depth)));
205 }
206
SetFITSUnsignedPixels(const size_t length,const size_t bits_per_pixel,const EndianType endian,unsigned char * pixels)207 static void SetFITSUnsignedPixels(const size_t length,
208 const size_t bits_per_pixel,const EndianType endian,unsigned char *pixels)
209 {
210 register ssize_t
211 i;
212
213 if (endian != MSBEndian)
214 pixels+=(bits_per_pixel >> 3)-1;
215 for (i=0; i < (ssize_t) length; i++)
216 {
217 *pixels^=0x80;
218 pixels+=bits_per_pixel >> 3;
219 }
220 }
221
ReadFITSImage(const ImageInfo * image_info,ExceptionInfo * exception)222 static Image *ReadFITSImage(const ImageInfo *image_info,
223 ExceptionInfo *exception)
224 {
225 typedef struct _FITSInfo
226 {
227 MagickBooleanType
228 extend,
229 simple;
230
231 int
232 bits_per_pixel,
233 columns,
234 rows,
235 number_axes,
236 number_planes;
237
238 double
239 min_data,
240 max_data,
241 zero,
242 scale;
243
244 EndianType
245 endian;
246 } FITSInfo;
247
248 char
249 *comment,
250 keyword[9],
251 property[MagickPathExtent],
252 value[73];
253
254 double
255 pixel,
256 scale;
257
258 FITSInfo
259 fits_info;
260
261 Image
262 *image;
263
264 int
265 c;
266
267 MagickBooleanType
268 status;
269
270 MagickSizeType
271 number_pixels;
272
273 register ssize_t
274 i,
275 x;
276
277 register Quantum
278 *q;
279
280 ssize_t
281 count,
282 scene,
283 y;
284
285 /*
286 Open image file.
287 */
288 assert(image_info != (const ImageInfo *) NULL);
289 assert(image_info->signature == MagickCoreSignature);
290 if (image_info->debug != MagickFalse)
291 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
292 image_info->filename);
293 assert(exception != (ExceptionInfo *) NULL);
294 assert(exception->signature == MagickCoreSignature);
295 image=AcquireImage(image_info,exception);
296 status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
297 if (status == MagickFalse)
298 {
299 image=DestroyImageList(image);
300 return((Image *) NULL);
301 }
302 /*
303 Initialize image header.
304 */
305 (void) memset(&fits_info,0,sizeof(fits_info));
306 fits_info.extend=MagickFalse;
307 fits_info.simple=MagickFalse;
308 fits_info.bits_per_pixel=8;
309 fits_info.columns=1;
310 fits_info.rows=1;
311 fits_info.number_planes=1;
312 fits_info.min_data=0.0;
313 fits_info.max_data=0.0;
314 fits_info.zero=0.0;
315 fits_info.scale=1.0;
316 fits_info.endian=MSBEndian;
317 /*
318 Decode image header.
319 */
320 for (comment=(char *) NULL; EOFBlob(image) == MagickFalse; )
321 {
322 for ( ; EOFBlob(image) == MagickFalse; )
323 {
324 register char
325 *p;
326
327 count=ReadBlob(image,8,(unsigned char *) keyword);
328 if (count != 8)
329 break;
330 for (i=0; i < 8; i++)
331 {
332 if (isspace((int) ((unsigned char) keyword[i])) != 0)
333 break;
334 keyword[i]=LocaleLowercase((int) ((unsigned char) keyword[i]));
335 }
336 keyword[i]='\0';
337 count=ReadBlob(image,72,(unsigned char *) value);
338 value[72]='\0';
339 if (count != 72)
340 break;
341 p=value;
342 if (*p == '=')
343 {
344 p+=2;
345 while (isspace((int) ((unsigned char) *p)) != 0)
346 p++;
347 }
348 if (LocaleCompare(keyword,"end") == 0)
349 break;
350 if (LocaleCompare(keyword,"extend") == 0)
351 fits_info.extend=(*p == 'T') || (*p == 't') ? MagickTrue : MagickFalse;
352 if (LocaleCompare(keyword,"simple") == 0)
353 fits_info.simple=(*p == 'T') || (*p == 't') ? MagickTrue : MagickFalse;
354 if (LocaleCompare(keyword,"bitpix") == 0)
355 fits_info.bits_per_pixel=StringToLong(p);
356 if (LocaleCompare(keyword,"naxis") == 0)
357 fits_info.number_axes=StringToLong(p);
358 if (LocaleCompare(keyword,"naxis1") == 0)
359 fits_info.columns=StringToLong(p);
360 if (LocaleCompare(keyword,"naxis2") == 0)
361 fits_info.rows=StringToLong(p);
362 if (LocaleCompare(keyword,"naxis3") == 0)
363 fits_info.number_planes=StringToLong(p);
364 if (LocaleCompare(keyword,"datamax") == 0)
365 fits_info.max_data=StringToDouble(p,(char **) NULL);
366 if (LocaleCompare(keyword,"datamin") == 0)
367 fits_info.min_data=StringToDouble(p,(char **) NULL);
368 if (LocaleCompare(keyword,"bzero") == 0)
369 fits_info.zero=StringToDouble(p,(char **) NULL);
370 if (LocaleCompare(keyword,"bscale") == 0)
371 fits_info.scale=StringToDouble(p,(char **) NULL);
372 if (LocaleCompare(keyword,"comment") == 0)
373 {
374 if (comment == (char *) NULL)
375 comment=ConstantString(p);
376 else
377 (void) ConcatenateString(&comment,p);
378 }
379 if (LocaleCompare(keyword,"xendian") == 0)
380 {
381 if (LocaleNCompare(p,"big",3) == 0)
382 fits_info.endian=MSBEndian;
383 else
384 fits_info.endian=LSBEndian;
385 }
386 (void) FormatLocaleString(property,MagickPathExtent,"fits:%s",keyword);
387 (void) SetImageProperty(image,property,p,exception);
388 }
389 c=0;
390 while (((TellBlob(image) % FITSBlocksize) != 0) && (c != EOF))
391 c=ReadBlobByte(image);
392 if (fits_info.extend == MagickFalse)
393 break;
394 if ((fits_info.bits_per_pixel != 8) && (fits_info.bits_per_pixel != 16) &&
395 (fits_info.bits_per_pixel != 32) && (fits_info.bits_per_pixel != 64) &&
396 (fits_info.bits_per_pixel != -32) && (fits_info.bits_per_pixel != -64))
397 {
398 if (comment != (char *) NULL)
399 comment=DestroyString(comment);
400 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
401 }
402 number_pixels=(MagickSizeType) fits_info.columns*fits_info.rows;
403 if ((fits_info.simple != MagickFalse) && (fits_info.number_axes >= 1) &&
404 (fits_info.number_axes <= 4) && (number_pixels != 0))
405 break;
406 }
407 /*
408 Verify that required image information is defined.
409 */
410 if (comment != (char *) NULL)
411 {
412 (void) SetImageProperty(image,"comment",comment,exception);
413 comment=DestroyString(comment);
414 }
415 if (EOFBlob(image) != MagickFalse)
416 ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
417 image->filename);
418 number_pixels=(MagickSizeType) fits_info.columns*fits_info.rows;
419 if ((fits_info.simple == MagickFalse) || (fits_info.number_axes < 1) ||
420 (fits_info.number_axes > 4) || (number_pixels == 0))
421 ThrowReaderException(CorruptImageError,"ImageTypeNotSupported");
422 for (scene=0; scene < (ssize_t) fits_info.number_planes; scene++)
423 {
424 image->columns=(size_t) fits_info.columns;
425 image->rows=(size_t) fits_info.rows;
426 image->depth=(size_t) (fits_info.bits_per_pixel < 0 ? -1 : 1)*
427 fits_info.bits_per_pixel;
428 image->endian=fits_info.endian;
429 image->scene=(size_t) scene;
430 if ((image_info->ping != MagickFalse) && (image_info->number_scenes != 0))
431 if (image->scene >= (image_info->scene+image_info->number_scenes-1))
432 break;
433 status=SetImageExtent(image,image->columns,image->rows,exception);
434 if (status == MagickFalse)
435 return(DestroyImageList(image));
436 /*
437 Initialize image structure.
438 */
439 (void) SetImageColorspace(image,GRAYColorspace,exception);
440 if ((fits_info.min_data == 0.0) && (fits_info.max_data == 0.0))
441 {
442 if ((fits_info.bits_per_pixel == -32) ||
443 (fits_info.bits_per_pixel == -64))
444 (void) GetFITSPixelExtrema(image,fits_info.bits_per_pixel,
445 &fits_info.min_data,&fits_info.max_data);
446 else
447 fits_info.max_data=GetFITSPixelRange((size_t)
448 fits_info.bits_per_pixel);
449 }
450 else
451 fits_info.max_data=GetFITSPixelRange((size_t) fits_info.bits_per_pixel);
452 /*
453 Convert FITS pixels to pixel packets.
454 */
455 scale=QuantumRange*PerceptibleReciprocal(fits_info.max_data-
456 fits_info.min_data);
457 for (y=(ssize_t) image->rows-1; y >= 0; y--)
458 {
459 q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
460 if (q == (Quantum *) NULL)
461 break;
462 for (x=0; x < (ssize_t) image->columns; x++)
463 {
464 pixel=GetFITSPixel(image,fits_info.bits_per_pixel);
465 if ((image->depth == 16) || (image->depth == 32) ||
466 (image->depth == 64))
467 SetFITSUnsignedPixels(1,image->depth,image->endian,
468 (unsigned char *) &pixel);
469 SetPixelGray(image,ClampToQuantum(scale*(fits_info.scale*(pixel-
470 fits_info.min_data)+fits_info.zero)),q);
471 q+=GetPixelChannels(image);
472 }
473 if (SyncAuthenticPixels(image,exception) == MagickFalse)
474 break;
475 if (image->previous == (Image *) NULL)
476 {
477 status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
478 image->rows);
479 if (status == MagickFalse)
480 break;
481 }
482 }
483 if (EOFBlob(image) != MagickFalse)
484 {
485 ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
486 image->filename);
487 break;
488 }
489 /*
490 Proceed to next image.
491 */
492 if (image_info->number_scenes != 0)
493 if (image->scene >= (image_info->scene+image_info->number_scenes-1))
494 break;
495 if (scene < (ssize_t) (fits_info.number_planes-1))
496 {
497 /*
498 Allocate next image structure.
499 */
500 AcquireNextImage(image_info,image,exception);
501 if (GetNextImageInList(image) == (Image *) NULL)
502 {
503 status=MagickFalse;
504 break;
505 }
506 image=SyncNextImageInList(image);
507 status=SetImageProgress(image,LoadImagesTag,TellBlob(image),
508 GetBlobSize(image));
509 if (status == MagickFalse)
510 break;
511 }
512 }
513 (void) CloseBlob(image);
514 if (status == MagickFalse)
515 return(DestroyImageList(image));
516 return(GetFirstImageInList(image));
517 }
518
519 /*
520 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
521 % %
522 % %
523 % %
524 % R e g i s t e r F I T S I m a g e %
525 % %
526 % %
527 % %
528 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
529 %
530 % RegisterFITSImage() adds attributes for the FITS image format to
531 % the list of supported formats. The attributes include the image format
532 % tag, a method to read and/or write the format, whether the format
533 % supports the saving of more than one frame to the same file or blob,
534 % whether the format supports native in-memory I/O, and a brief
535 % description of the format.
536 %
537 % The format of the RegisterFITSImage method is:
538 %
539 % size_t RegisterFITSImage(void)
540 %
541 */
RegisterFITSImage(void)542 ModuleExport size_t RegisterFITSImage(void)
543 {
544 MagickInfo
545 *entry;
546
547 entry=AcquireMagickInfo("FITS","FITS","Flexible Image Transport System");
548 entry->decoder=(DecodeImageHandler *) ReadFITSImage;
549 entry->encoder=(EncodeImageHandler *) WriteFITSImage;
550 entry->magick=(IsImageFormatHandler *) IsFITS;
551 entry->flags^=CoderAdjoinFlag;
552 entry->flags|=CoderDecoderSeekableStreamFlag;
553 (void) RegisterMagickInfo(entry);
554 entry=AcquireMagickInfo("FITS","FTS","Flexible Image Transport System");
555 entry->decoder=(DecodeImageHandler *) ReadFITSImage;
556 entry->encoder=(EncodeImageHandler *) WriteFITSImage;
557 entry->magick=(IsImageFormatHandler *) IsFITS;
558 entry->flags^=CoderAdjoinFlag;
559 entry->flags|=CoderDecoderSeekableStreamFlag;
560 (void) RegisterMagickInfo(entry);
561 return(MagickImageCoderSignature);
562 }
563
564 /*
565 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
566 % %
567 % %
568 % %
569 % U n r e g i s t e r F I T S I m a g e %
570 % %
571 % %
572 % %
573 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
574 %
575 % UnregisterFITSImage() removes format registrations made by the
576 % FITS module from the list of supported formats.
577 %
578 % The format of the UnregisterFITSImage method is:
579 %
580 % UnregisterFITSImage(void)
581 %
582 */
UnregisterFITSImage(void)583 ModuleExport void UnregisterFITSImage(void)
584 {
585 (void) UnregisterMagickInfo("FITS");
586 (void) UnregisterMagickInfo("FTS");
587 }
588
589 /*
590 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
591 % %
592 % %
593 % %
594 % W r i t e F I T S I m a g e %
595 % %
596 % %
597 % %
598 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
599 %
600 % WriteFITSImage() writes a Flexible Image Transport System image to a
601 % file as gray scale intensities [0..255].
602 %
603 % The format of the WriteFITSImage method is:
604 %
605 % MagickBooleanType WriteFITSImage(const ImageInfo *image_info,
606 % Image *image,ExceptionInfo *exception)
607 %
608 % A description of each parameter follows.
609 %
610 % o image_info: the image info.
611 %
612 % o image: The image.
613 %
614 % o exception: return any errors or warnings in this structure.
615 %
616 */
617
CopyFitsRecord(char * buffer,const char * data,const ssize_t offset)618 static inline void CopyFitsRecord(char *buffer,const char *data,
619 const ssize_t offset)
620 {
621 size_t
622 length;
623
624 if (data == (char *) NULL)
625 return;
626 length=MagickMin(strlen(data),80);
627 if (length > (size_t) (FITSBlocksize-offset))
628 length=FITSBlocksize-offset;
629 (void) strncpy(buffer+offset,data,length);
630 }
631
WriteFITSImage(const ImageInfo * image_info,Image * image,ExceptionInfo * exception)632 static MagickBooleanType WriteFITSImage(const ImageInfo *image_info,
633 Image *image,ExceptionInfo *exception)
634 {
635 char
636 *fits_info,
637 header[FITSBlocksize],
638 *url;
639
640 MagickBooleanType
641 status;
642
643 QuantumInfo
644 *quantum_info;
645
646 register const Quantum
647 *p;
648
649 size_t
650 length;
651
652 ssize_t
653 count,
654 offset,
655 y;
656
657 unsigned char
658 *pixels;
659
660 /*
661 Open output image file.
662 */
663 assert(image_info != (const ImageInfo *) NULL);
664 assert(image_info->signature == MagickCoreSignature);
665 assert(image != (Image *) NULL);
666 assert(image->signature == MagickCoreSignature);
667 if (image->debug != MagickFalse)
668 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
669 assert(exception != (ExceptionInfo *) NULL);
670 assert(exception->signature == MagickCoreSignature);
671 status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
672 if (status == MagickFalse)
673 return(status);
674 (void) TransformImageColorspace(image,sRGBColorspace,exception);
675 /*
676 Allocate image memory.
677 */
678 fits_info=(char *) AcquireQuantumMemory(FITSBlocksize,sizeof(*fits_info));
679 if (fits_info == (char *) NULL)
680 ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
681 (void) memset(fits_info,' ',FITSBlocksize*sizeof(*fits_info));
682 /*
683 Initialize image header.
684 */
685 image->depth=GetImageQuantumDepth(image,MagickFalse);
686 image->endian=MSBEndian;
687 quantum_info=AcquireQuantumInfo(image_info,image);
688 if (quantum_info == (QuantumInfo *) NULL)
689 {
690 fits_info=DestroyString(fits_info);
691 ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
692 }
693 offset=0;
694 (void) FormatLocaleString(header,FITSBlocksize,
695 "SIMPLE = T");
696 CopyFitsRecord(fits_info,header,offset);
697 offset+=80;
698 (void) FormatLocaleString(header,FITSBlocksize,"BITPIX = %10ld",
699 (long) ((quantum_info->format == FloatingPointQuantumFormat ? -1 : 1)*
700 image->depth));
701 CopyFitsRecord(fits_info,header,offset);
702 offset+=80;
703 (void) FormatLocaleString(header,FITSBlocksize,"NAXIS = %10lu",
704 SetImageGray(image,exception) != MagickFalse ? 2UL : 3UL);
705 CopyFitsRecord(fits_info,header,offset);
706 offset+=80;
707 (void) FormatLocaleString(header,FITSBlocksize,"NAXIS1 = %10lu",
708 (unsigned long) image->columns);
709 CopyFitsRecord(fits_info,header,offset);
710 offset+=80;
711 (void) FormatLocaleString(header,FITSBlocksize,"NAXIS2 = %10lu",
712 (unsigned long) image->rows);
713 CopyFitsRecord(fits_info,header,offset);
714 offset+=80;
715 if (SetImageGray(image,exception) == MagickFalse)
716 {
717 (void) FormatLocaleString(header,FITSBlocksize,
718 "NAXIS3 = %10lu",3UL);
719 CopyFitsRecord(fits_info,header,offset);
720 offset+=80;
721 }
722 (void) FormatLocaleString(header,FITSBlocksize,"BSCALE = %E",1.0);
723 CopyFitsRecord(fits_info,header,offset);
724 offset+=80;
725 (void) FormatLocaleString(header,FITSBlocksize,"BZERO = %E",
726 image->depth > 8 ? (GetFITSPixelRange(image->depth)+1)/2.0 : 0.0);
727 CopyFitsRecord(fits_info,header,offset);
728 offset+=80;
729 (void) FormatLocaleString(header,FITSBlocksize,"DATAMAX = %E",
730 1.0*((MagickOffsetType) GetQuantumRange(image->depth)));
731 CopyFitsRecord(fits_info,header,offset);
732 offset+=80;
733 (void) FormatLocaleString(header,FITSBlocksize,"DATAMIN = %E",0.0);
734 CopyFitsRecord(fits_info,header,offset);
735 offset+=80;
736 if (image->endian == LSBEndian)
737 {
738 (void) FormatLocaleString(header,FITSBlocksize,"XENDIAN = 'SMALL'");
739 CopyFitsRecord(fits_info,header,offset);
740 offset+=80;
741 }
742 url=GetMagickHomeURL();
743 (void) FormatLocaleString(header,FITSBlocksize,"HISTORY %.72s",url);
744 url=DestroyString(url);
745 CopyFitsRecord(fits_info,header,offset);
746 offset+=80;
747 (void) strncpy(header,"END",FITSBlocksize);
748 CopyFitsRecord(fits_info,header,offset);
749 offset+=80;
750 (void) WriteBlob(image,FITSBlocksize,(unsigned char *) fits_info);
751 /*
752 Convert image to fits scale PseudoColor class.
753 */
754 pixels=(unsigned char *) GetQuantumPixels(quantum_info);
755 if (SetImageGray(image,exception) != MagickFalse)
756 {
757 length=GetQuantumExtent(image,quantum_info,GrayQuantum);
758 for (y=(ssize_t) image->rows-1; y >= 0; y--)
759 {
760 p=GetVirtualPixels(image,0,y,image->columns,1,exception);
761 if (p == (const Quantum *) NULL)
762 break;
763 length=ExportQuantumPixels(image,(CacheView *) NULL,quantum_info,
764 GrayQuantum,pixels,exception);
765 if (image->depth == 16)
766 SetFITSUnsignedPixels(image->columns,image->depth,image->endian,
767 pixels);
768 if (((image->depth == 32) || (image->depth == 64)) &&
769 (quantum_info->format != FloatingPointQuantumFormat))
770 SetFITSUnsignedPixels(image->columns,image->depth,image->endian,
771 pixels);
772 count=WriteBlob(image,length,pixels);
773 if (count != (ssize_t) length)
774 break;
775 status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
776 image->rows);
777 if (status == MagickFalse)
778 break;
779 }
780 }
781 else
782 {
783 length=GetQuantumExtent(image,quantum_info,RedQuantum);
784 for (y=(ssize_t) image->rows-1; y >= 0; y--)
785 {
786 p=GetVirtualPixels(image,0,y,image->columns,1,exception);
787 if (p == (const Quantum *) NULL)
788 break;
789 length=ExportQuantumPixels(image,(CacheView *) NULL,quantum_info,
790 RedQuantum,pixels,exception);
791 if (image->depth == 16)
792 SetFITSUnsignedPixels(image->columns,image->depth,image->endian,
793 pixels);
794 if (((image->depth == 32) || (image->depth == 64)) &&
795 (quantum_info->format != FloatingPointQuantumFormat))
796 SetFITSUnsignedPixels(image->columns,image->depth,image->endian,
797 pixels);
798 count=WriteBlob(image,length,pixels);
799 if (count != (ssize_t) length)
800 break;
801 status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
802 image->rows);
803 if (status == MagickFalse)
804 break;
805 }
806 length=GetQuantumExtent(image,quantum_info,GreenQuantum);
807 for (y=(ssize_t) image->rows-1; y >= 0; y--)
808 {
809 p=GetVirtualPixels(image,0,y,image->columns,1,exception);
810 if (p == (const Quantum *) NULL)
811 break;
812 length=ExportQuantumPixels(image,(CacheView *) NULL,quantum_info,
813 GreenQuantum,pixels,exception);
814 if (image->depth == 16)
815 SetFITSUnsignedPixels(image->columns,image->depth,image->endian,
816 pixels);
817 if (((image->depth == 32) || (image->depth == 64)) &&
818 (quantum_info->format != FloatingPointQuantumFormat))
819 SetFITSUnsignedPixels(image->columns,image->depth,image->endian,
820 pixels);
821 count=WriteBlob(image,length,pixels);
822 if (count != (ssize_t) length)
823 break;
824 status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
825 image->rows);
826 if (status == MagickFalse)
827 break;
828 }
829 length=GetQuantumExtent(image,quantum_info,BlueQuantum);
830 for (y=(ssize_t) image->rows-1; y >= 0; y--)
831 {
832 p=GetVirtualPixels(image,0,y,image->columns,1,exception);
833 if (p == (const Quantum *) NULL)
834 break;
835 length=ExportQuantumPixels(image,(CacheView *) NULL,quantum_info,
836 BlueQuantum,pixels,exception);
837 if (image->depth == 16)
838 SetFITSUnsignedPixels(image->columns,image->depth,image->endian,
839 pixels);
840 if (((image->depth == 32) || (image->depth == 64)) &&
841 (quantum_info->format != FloatingPointQuantumFormat))
842 SetFITSUnsignedPixels(image->columns,image->depth,image->endian,
843 pixels);
844 count=WriteBlob(image,length,pixels);
845 if (count != (ssize_t) length)
846 break;
847 status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
848 image->rows);
849 if (status == MagickFalse)
850 break;
851 }
852 }
853 quantum_info=DestroyQuantumInfo(quantum_info);
854 length=(size_t) (FITSBlocksize-TellBlob(image) % FITSBlocksize);
855 if (length != 0)
856 {
857 (void) memset(fits_info,0,length*sizeof(*fits_info));
858 (void) WriteBlob(image,length,(unsigned char *) fits_info);
859 }
860 fits_info=DestroyString(fits_info);
861 (void) CloseBlob(image);
862 return(MagickTrue);
863 }
864