cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 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 | % John Cristy % |
| 17 | % July 1992 % |
| 18 | % % |
| 19 | % % |
cristy | 16af1cb | 2009-12-11 21:38:29 +0000 | [diff] [blame] | 20 | % Copyright 1999-2010 ImageMagick Studio LLC, a non-profit organization % |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 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 | % http://www.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 "magick/studio.h" |
cristy | 5a2ca48 | 2009-10-14 18:24:56 +0000 | [diff] [blame] | 43 | #include "magick/attribute.h" |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 44 | #include "magick/blob.h" |
| 45 | #include "magick/blob-private.h" |
| 46 | #include "magick/cache.h" |
| 47 | #include "magick/color-private.h" |
| 48 | #include "magick/colorspace.h" |
| 49 | #include "magick/constitute.h" |
| 50 | #include "magick/exception.h" |
| 51 | #include "magick/exception-private.h" |
| 52 | #include "magick/image.h" |
| 53 | #include "magick/image-private.h" |
| 54 | #include "magick/list.h" |
| 55 | #include "magick/magick.h" |
| 56 | #include "magick/memory_.h" |
cristy | f2f2727 | 2009-12-17 14:48:46 +0000 | [diff] [blame] | 57 | #include "magick/module.h" |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 58 | #include "magick/monitor.h" |
| 59 | #include "magick/monitor-private.h" |
| 60 | #include "magick/pixel-private.h" |
| 61 | #include "magick/pixel-private.h" |
cristy | 5a2ca48 | 2009-10-14 18:24:56 +0000 | [diff] [blame] | 62 | #include "magick/property.h" |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 63 | #include "magick/static.h" |
| 64 | #include "magick/statistic.h" |
| 65 | #include "magick/string_.h" |
cristy | f2f2727 | 2009-12-17 14:48:46 +0000 | [diff] [blame] | 66 | #include "magick/string-private.h" |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 67 | #include "magick/module.h" |
| 68 | |
| 69 | /* |
| 70 | Forward declarations. |
| 71 | */ |
| 72 | #define FITSBlocksize 2880UL |
| 73 | |
| 74 | /* |
| 75 | Forward declarations. |
| 76 | */ |
| 77 | static MagickBooleanType |
| 78 | WriteFITSImage(const ImageInfo *,Image *); |
| 79 | |
| 80 | /* |
| 81 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 82 | % % |
| 83 | % % |
| 84 | % % |
| 85 | % I s F I T S % |
| 86 | % % |
| 87 | % % |
| 88 | % % |
| 89 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 90 | % |
| 91 | % IsFITS() returns MagickTrue if the image format type, identified by the |
| 92 | % magick string, is FITS. |
| 93 | % |
| 94 | % The format of the IsFITS method is: |
| 95 | % |
| 96 | % MagickBooleanType IsFITS(const unsigned char *magick,const size_t length) |
| 97 | % |
| 98 | % A description of each parameter follows: |
| 99 | % |
| 100 | % o magick: compare image format pattern against these bytes. |
| 101 | % |
| 102 | % o length: Specifies the length of the magick string. |
| 103 | % |
| 104 | */ |
| 105 | static MagickBooleanType IsFITS(const unsigned char *magick,const size_t length) |
| 106 | { |
| 107 | if (length < 6) |
| 108 | return(MagickFalse); |
| 109 | if (LocaleNCompare((const char *) magick,"IT0",3) == 0) |
| 110 | return(MagickTrue); |
| 111 | if (LocaleNCompare((const char *) magick,"SIMPLE",6) == 0) |
| 112 | return(MagickTrue); |
| 113 | return(MagickFalse); |
| 114 | } |
| 115 | |
| 116 | /* |
| 117 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 118 | % % |
| 119 | % % |
| 120 | % % |
| 121 | % R e a d F I T S I m a g e % |
| 122 | % % |
| 123 | % % |
| 124 | % % |
| 125 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 126 | % |
| 127 | % ReadFITSImage() reads a FITS image file and returns it. It allocates the |
| 128 | % memory necessary for the new Image structure and returns a pointer to the |
| 129 | % new image. |
| 130 | % |
| 131 | % The format of the ReadFITSImage method is: |
| 132 | % |
| 133 | % Image *ReadFITSImage(const ImageInfo *image_info, |
| 134 | % ExceptionInfo *exception) |
| 135 | % |
| 136 | % A description of each parameter follows: |
| 137 | % |
| 138 | % o image_info: the image info. |
| 139 | % |
| 140 | % o exception: return any errors or warnings in this structure. |
| 141 | % |
| 142 | */ |
| 143 | |
| 144 | static inline double GetFITSPixel(Image *image,int bits_per_pixel) |
| 145 | { |
| 146 | switch (image->depth >> 3) |
| 147 | { |
| 148 | case 1: |
| 149 | return((double) ReadBlobByte(image)); |
| 150 | case 2: |
| 151 | return((double) ((short) ReadBlobShort(image))); |
| 152 | case 4: |
| 153 | { |
| 154 | if (bits_per_pixel > 0) |
| 155 | return((double) ((long) ReadBlobLong(image))); |
| 156 | return((double) ReadBlobFloat(image)); |
| 157 | } |
| 158 | case 8: |
| 159 | { |
| 160 | if (bits_per_pixel > 0) |
| 161 | return((double) ((MagickOffsetType) ReadBlobLongLong(image))); |
| 162 | } |
| 163 | default: |
| 164 | break; |
| 165 | } |
| 166 | return(ReadBlobDouble(image)); |
| 167 | } |
| 168 | |
| 169 | static void GetFITSPixelExtrema(Image *image,const int bits_per_pixel, |
| 170 | double *minima,double *maxima) |
| 171 | { |
| 172 | double |
| 173 | pixel; |
| 174 | |
| 175 | MagickOffsetType |
| 176 | offset; |
| 177 | |
| 178 | MagickSizeType |
| 179 | number_pixels; |
| 180 | |
| 181 | register MagickOffsetType |
| 182 | i; |
| 183 | |
| 184 | offset=TellBlob(image); |
| 185 | number_pixels=(MagickSizeType) image->columns*image->rows; |
| 186 | *minima=GetFITSPixel(image,bits_per_pixel); |
| 187 | *maxima=(*minima); |
| 188 | for (i=1; i < (MagickOffsetType) number_pixels; i++) |
| 189 | { |
| 190 | pixel=GetFITSPixel(image,bits_per_pixel); |
| 191 | if (pixel < *minima) |
| 192 | *minima=pixel; |
| 193 | if (pixel > *maxima) |
| 194 | *maxima=pixel; |
| 195 | } |
| 196 | (void) SeekBlob(image,offset,SEEK_SET); |
| 197 | } |
| 198 | |
| 199 | static inline double GetFITSPixelRange(const unsigned long depth) |
| 200 | { |
| 201 | return((double) ((MagickOffsetType) GetQuantumRange(depth))); |
| 202 | } |
| 203 | |
| 204 | static void SetFITSUnsignedPixels(const size_t length, |
| 205 | const unsigned long bits_per_pixel,unsigned char *pixels) |
| 206 | { |
| 207 | register long |
| 208 | i; |
| 209 | |
| 210 | for (i=0; i < (long) length; i++) |
| 211 | { |
| 212 | *pixels^=0x80; |
| 213 | pixels+=bits_per_pixel >> 3; |
| 214 | } |
| 215 | } |
| 216 | |
| 217 | static Image *ReadFITSImage(const ImageInfo *image_info, |
| 218 | ExceptionInfo *exception) |
| 219 | { |
| 220 | typedef struct _FITSInfo |
| 221 | { |
| 222 | MagickBooleanType |
| 223 | extend, |
| 224 | simple; |
| 225 | |
| 226 | int |
| 227 | bits_per_pixel, |
| 228 | columns, |
| 229 | rows, |
| 230 | number_axes, |
| 231 | number_planes; |
| 232 | |
| 233 | double |
| 234 | min_data, |
| 235 | max_data, |
| 236 | zero, |
| 237 | scale; |
| 238 | |
| 239 | EndianType |
| 240 | endian; |
| 241 | } FITSInfo; |
| 242 | |
| 243 | char |
| 244 | *comment, |
| 245 | keyword[9], |
| 246 | property[MaxTextExtent], |
| 247 | value[73]; |
| 248 | |
| 249 | double |
| 250 | pixel, |
| 251 | scale; |
| 252 | |
| 253 | FITSInfo |
| 254 | fits_info; |
| 255 | |
| 256 | Image |
| 257 | *image; |
| 258 | |
| 259 | int |
| 260 | c; |
| 261 | |
| 262 | long |
| 263 | scene, |
| 264 | y; |
| 265 | |
| 266 | MagickBooleanType |
| 267 | status; |
| 268 | |
| 269 | MagickSizeType |
| 270 | number_pixels; |
| 271 | |
| 272 | register long |
| 273 | i, |
| 274 | x; |
| 275 | |
| 276 | register PixelPacket |
| 277 | *q; |
| 278 | |
| 279 | ssize_t |
| 280 | count; |
| 281 | |
| 282 | /* |
| 283 | Open image file. |
| 284 | */ |
| 285 | assert(image_info != (const ImageInfo *) NULL); |
| 286 | assert(image_info->signature == MagickSignature); |
| 287 | if (image_info->debug != MagickFalse) |
| 288 | (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s", |
| 289 | image_info->filename); |
| 290 | assert(exception != (ExceptionInfo *) NULL); |
| 291 | assert(exception->signature == MagickSignature); |
| 292 | image=AcquireImage(image_info); |
| 293 | status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception); |
| 294 | if (status == MagickFalse) |
| 295 | { |
| 296 | image=DestroyImageList(image); |
| 297 | return((Image *) NULL); |
| 298 | } |
| 299 | /* |
| 300 | Initialize image header. |
| 301 | */ |
| 302 | (void) ResetMagickMemory(&fits_info,0,sizeof(fits_info)); |
| 303 | fits_info.extend=MagickFalse; |
| 304 | fits_info.simple=MagickFalse; |
| 305 | fits_info.bits_per_pixel=8; |
| 306 | fits_info.columns=1; |
| 307 | fits_info.rows=1; |
| 308 | fits_info.rows=1; |
| 309 | fits_info.number_planes=1; |
| 310 | fits_info.min_data=0.0; |
| 311 | fits_info.max_data=0.0; |
| 312 | fits_info.zero=0.0; |
| 313 | fits_info.scale=1.0; |
| 314 | fits_info.endian=MSBEndian; |
| 315 | /* |
| 316 | Decode image header. |
| 317 | */ |
| 318 | for (comment=(char *) NULL; EOFBlob(image) == MagickFalse; ) |
| 319 | { |
| 320 | for ( ; EOFBlob(image) == MagickFalse; ) |
| 321 | { |
| 322 | register char |
| 323 | *p; |
| 324 | |
| 325 | count=ReadBlob(image,8,(unsigned char *) keyword); |
| 326 | if (count != 8) |
| 327 | break; |
| 328 | for (i=0; i < 8; i++) |
| 329 | { |
| 330 | if (isspace((int) ((unsigned char) keyword[i])) != 0) |
| 331 | break; |
cristy | 466802f | 2010-02-24 14:18:37 +0000 | [diff] [blame^] | 332 | keyword[i]=tolower((int) ((unsigned char) keyword[i])); |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 333 | } |
| 334 | keyword[i]='\0'; |
| 335 | count=ReadBlob(image,72,(unsigned char *) value); |
| 336 | if (count != 72) |
| 337 | break; |
| 338 | value[72]='\0'; |
| 339 | p=value; |
| 340 | if (*p == '=') |
| 341 | { |
| 342 | p+=2; |
| 343 | while (isspace((int) ((unsigned char) *p)) != 0) |
| 344 | p++; |
| 345 | } |
| 346 | if (LocaleCompare(keyword,"end") == 0) |
| 347 | break; |
| 348 | if (LocaleCompare(keyword,"extend") == 0) |
| 349 | fits_info.extend=(*p == 'T') || (*p == 't') ? MagickTrue : MagickFalse; |
| 350 | if (LocaleCompare(keyword,"simple") == 0) |
| 351 | fits_info.simple=(*p == 'T') || (*p == 't') ? MagickTrue : MagickFalse; |
| 352 | if (LocaleCompare(keyword,"bitpix") == 0) |
cristy | f2f2727 | 2009-12-17 14:48:46 +0000 | [diff] [blame] | 353 | fits_info.bits_per_pixel=StringToLong(p); |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 354 | if (LocaleCompare(keyword,"naxis") == 0) |
cristy | f2f2727 | 2009-12-17 14:48:46 +0000 | [diff] [blame] | 355 | fits_info.number_axes=StringToLong(p); |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 356 | if (LocaleCompare(keyword,"naxis1") == 0) |
cristy | f2f2727 | 2009-12-17 14:48:46 +0000 | [diff] [blame] | 357 | fits_info.columns=StringToLong(p); |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 358 | if (LocaleCompare(keyword,"naxis2") == 0) |
cristy | f2f2727 | 2009-12-17 14:48:46 +0000 | [diff] [blame] | 359 | fits_info.rows=StringToLong(p); |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 360 | if (LocaleCompare(keyword,"naxis3") == 0) |
cristy | f2f2727 | 2009-12-17 14:48:46 +0000 | [diff] [blame] | 361 | fits_info.number_planes=StringToLong(p); |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 362 | if (LocaleCompare(keyword,"datamax") == 0) |
cristy | f2f2727 | 2009-12-17 14:48:46 +0000 | [diff] [blame] | 363 | fits_info.max_data=StringToDouble(p); |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 364 | if (LocaleCompare(keyword,"datamin") == 0) |
cristy | f2f2727 | 2009-12-17 14:48:46 +0000 | [diff] [blame] | 365 | fits_info.min_data=StringToDouble(p); |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 366 | if (LocaleCompare(keyword,"bzero") == 0) |
cristy | f2f2727 | 2009-12-17 14:48:46 +0000 | [diff] [blame] | 367 | fits_info.zero=StringToDouble(p); |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 368 | if (LocaleCompare(keyword,"bscale") == 0) |
cristy | f2f2727 | 2009-12-17 14:48:46 +0000 | [diff] [blame] | 369 | fits_info.scale=StringToDouble(p); |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 370 | if (LocaleCompare(keyword,"comment") == 0) |
| 371 | { |
| 372 | if (comment == (char *) NULL) |
| 373 | comment=ConstantString(p); |
| 374 | else |
| 375 | (void) ConcatenateString(&comment,p); |
| 376 | } |
| 377 | if (LocaleCompare(keyword,"xendian") == 0) |
| 378 | { |
| 379 | if (LocaleNCompare(p,"big",3) == 0) |
| 380 | fits_info.endian=MSBEndian; |
| 381 | else |
| 382 | fits_info.endian=LSBEndian; |
| 383 | } |
| 384 | (void) FormatMagickString(property,MaxTextExtent,"fits:%s",keyword); |
| 385 | (void) SetImageProperty(image,property,p); |
| 386 | } |
| 387 | c=0; |
| 388 | while (((TellBlob(image) % FITSBlocksize) != 0) && (c != EOF)) |
| 389 | c=ReadBlobByte(image); |
| 390 | if (fits_info.extend == MagickFalse) |
| 391 | break; |
| 392 | number_pixels=(MagickSizeType) fits_info.columns*fits_info.rows; |
| 393 | if ((fits_info.simple != MagickFalse) && (fits_info.number_axes >= 1) && |
| 394 | (fits_info.number_axes <= 4) && (number_pixels != 0)) |
| 395 | break; |
| 396 | } |
| 397 | /* |
| 398 | Verify that required image information is defined. |
| 399 | */ |
| 400 | if (comment != (char *) NULL) |
| 401 | { |
| 402 | (void) SetImageProperty(image,"comment",comment); |
| 403 | comment=DestroyString(comment); |
| 404 | } |
| 405 | if (EOFBlob(image) != MagickFalse) |
| 406 | ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile", |
| 407 | image->filename); |
| 408 | number_pixels=(MagickSizeType) fits_info.columns*fits_info.rows; |
| 409 | if ((fits_info.simple == MagickFalse) || (fits_info.number_axes < 1) || |
| 410 | (fits_info.number_axes > 4) || (number_pixels == 0)) |
| 411 | ThrowReaderException(CorruptImageError,"ImageTypeNotSupported"); |
| 412 | for (scene=0; scene < (long) fits_info.number_planes; scene++) |
| 413 | { |
| 414 | image->columns=(unsigned long) fits_info.columns; |
| 415 | image->rows=(unsigned long) fits_info.rows; |
| 416 | image->depth=(unsigned long) (fits_info.bits_per_pixel < 0 ? -1 : 1)* |
| 417 | fits_info.bits_per_pixel; |
| 418 | image->endian=fits_info.endian; |
| 419 | image->scene=(unsigned long) scene; |
| 420 | if ((image_info->ping != MagickFalse) && (image_info->number_scenes != 0)) |
| 421 | if (image->scene >= (image_info->scene+image_info->number_scenes-1)) |
| 422 | break; |
| 423 | /* |
| 424 | Initialize image structure. |
| 425 | */ |
| 426 | if ((fits_info.min_data != 0.0) || (fits_info.max_data != 0.0)) |
| 427 | { |
| 428 | if ((fits_info.bits_per_pixel != 0) && (fits_info.max_data == 0.0)) |
| 429 | fits_info.max_data=GetFITSPixelRange((unsigned long) |
| 430 | fits_info.bits_per_pixel); |
| 431 | } |
| 432 | else |
| 433 | GetFITSPixelExtrema(image,fits_info.bits_per_pixel,&fits_info.min_data, |
| 434 | &fits_info.max_data); |
| 435 | /* |
| 436 | Convert FITS pixels to pixel packets. |
| 437 | */ |
| 438 | scale=(double) QuantumRange/(fits_info.scale*(fits_info.max_data- |
| 439 | fits_info.min_data)+fits_info.zero); |
| 440 | for (y=(long) image->rows-1; y >= 0; y--) |
| 441 | { |
| 442 | q=QueueAuthenticPixels(image,0,y,image->columns,1,exception); |
| 443 | if (q == (PixelPacket *) NULL) |
| 444 | break; |
| 445 | for (x=0; x < (long) image->columns; x++) |
| 446 | { |
| 447 | pixel=GetFITSPixel(image,fits_info.bits_per_pixel); |
cristy | ce70c17 | 2010-01-07 17:15:30 +0000 | [diff] [blame] | 448 | q->red=(Quantum) ClampToQuantum(scale*(fits_info.scale*(pixel- |
cristy | 3ed852e | 2009-09-05 21:47:34 +0000 | [diff] [blame] | 449 | fits_info.min_data)+fits_info.zero)); |
| 450 | q->green=q->red; |
| 451 | q->blue=q->red; |
| 452 | q++; |
| 453 | } |
| 454 | if (SyncAuthenticPixels(image,exception) == MagickFalse) |
| 455 | break; |
| 456 | if (image->previous == (Image *) NULL) |
| 457 | { |
| 458 | status=SetImageProgress(image,LoadImageTag,y,image->rows); |
| 459 | if (status == MagickFalse) |
| 460 | break; |
| 461 | } |
| 462 | } |
| 463 | if (EOFBlob(image) != MagickFalse) |
| 464 | { |
| 465 | ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile", |
| 466 | image->filename); |
| 467 | break; |
| 468 | } |
| 469 | /* |
| 470 | Proceed to next image. |
| 471 | */ |
| 472 | if (image_info->number_scenes != 0) |
| 473 | if (image->scene >= (image_info->scene+image_info->number_scenes-1)) |
| 474 | break; |
| 475 | if (scene < (long) (fits_info.number_planes-1)) |
| 476 | { |
| 477 | /* |
| 478 | Allocate next image structure. |
| 479 | */ |
| 480 | AcquireNextImage(image_info,image); |
| 481 | if (GetNextImageInList(image) == (Image *) NULL) |
| 482 | { |
| 483 | image=DestroyImageList(image); |
| 484 | return((Image *) NULL); |
| 485 | } |
| 486 | image=SyncNextImageInList(image); |
| 487 | status=SetImageProgress(image,LoadImagesTag,TellBlob(image), |
| 488 | GetBlobSize(image)); |
| 489 | if (status == MagickFalse) |
| 490 | break; |
| 491 | } |
| 492 | } |
| 493 | (void) CloseBlob(image); |
| 494 | return(GetFirstImageInList(image)); |
| 495 | } |
| 496 | |
| 497 | /* |
| 498 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 499 | % % |
| 500 | % % |
| 501 | % % |
| 502 | % R e g i s t e r F I T S I m a g e % |
| 503 | % % |
| 504 | % % |
| 505 | % % |
| 506 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 507 | % |
| 508 | % RegisterFITSImage() adds attributes for the FITS image format to |
| 509 | % the list of supported formats. The attributes include the image format |
| 510 | % tag, a method to read and/or write the format, whether the format |
| 511 | % supports the saving of more than one frame to the same file or blob, |
| 512 | % whether the format supports native in-memory I/O, and a brief |
| 513 | % description of the format. |
| 514 | % |
| 515 | % The format of the RegisterFITSImage method is: |
| 516 | % |
| 517 | % unsigned long RegisterFITSImage(void) |
| 518 | % |
| 519 | */ |
| 520 | ModuleExport unsigned long RegisterFITSImage(void) |
| 521 | { |
| 522 | MagickInfo |
| 523 | *entry; |
| 524 | |
| 525 | entry=SetMagickInfo("FITS"); |
| 526 | entry->decoder=(DecodeImageHandler *) ReadFITSImage; |
| 527 | entry->encoder=(EncodeImageHandler *) WriteFITSImage; |
| 528 | entry->magick=(IsImageFormatHandler *) IsFITS; |
| 529 | entry->adjoin=MagickFalse; |
| 530 | entry->seekable_stream=MagickTrue; |
| 531 | entry->description=ConstantString("Flexible Image Transport System"); |
| 532 | entry->module=ConstantString("FITS"); |
| 533 | (void) RegisterMagickInfo(entry); |
| 534 | entry=SetMagickInfo("FTS"); |
| 535 | entry->decoder=(DecodeImageHandler *) ReadFITSImage; |
| 536 | entry->encoder=(EncodeImageHandler *) WriteFITSImage; |
| 537 | entry->magick=(IsImageFormatHandler *) IsFITS; |
| 538 | entry->adjoin=MagickFalse; |
| 539 | entry->seekable_stream=MagickTrue; |
| 540 | entry->description=ConstantString("Flexible Image Transport System"); |
| 541 | entry->module=ConstantString("FTS"); |
| 542 | (void) RegisterMagickInfo(entry); |
| 543 | return(MagickImageCoderSignature); |
| 544 | } |
| 545 | |
| 546 | /* |
| 547 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 548 | % % |
| 549 | % % |
| 550 | % % |
| 551 | % U n r e g i s t e r F I T S I m a g e % |
| 552 | % % |
| 553 | % % |
| 554 | % % |
| 555 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 556 | % |
| 557 | % UnregisterFITSImage() removes format registrations made by the |
| 558 | % FITS module from the list of supported formats. |
| 559 | % |
| 560 | % The format of the UnregisterFITSImage method is: |
| 561 | % |
| 562 | % UnregisterFITSImage(void) |
| 563 | % |
| 564 | */ |
| 565 | ModuleExport void UnregisterFITSImage(void) |
| 566 | { |
| 567 | (void) UnregisterMagickInfo("FITS"); |
| 568 | (void) UnregisterMagickInfo("FTS"); |
| 569 | } |
| 570 | |
| 571 | /* |
| 572 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 573 | % % |
| 574 | % % |
| 575 | % % |
| 576 | % W r i t e F I T S I m a g e % |
| 577 | % % |
| 578 | % % |
| 579 | % % |
| 580 | %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| 581 | % |
| 582 | % WriteFITSImage() writes a Flexible Image Transport System image to a |
| 583 | % file as gray scale intensities [0..255]. |
| 584 | % |
| 585 | % The format of the WriteFITSImage method is: |
| 586 | % |
| 587 | % MagickBooleanType WriteFITSImage(const ImageInfo *image_info, |
| 588 | % Image *image) |
| 589 | % |
| 590 | % A description of each parameter follows. |
| 591 | % |
| 592 | % o image_info: the image info. |
| 593 | % |
| 594 | % o image: The image. |
| 595 | % |
| 596 | */ |
| 597 | static MagickBooleanType WriteFITSImage(const ImageInfo *image_info, |
| 598 | Image *image) |
| 599 | { |
| 600 | char |
| 601 | header[FITSBlocksize], |
| 602 | *fits_info; |
| 603 | |
| 604 | long |
| 605 | y; |
| 606 | |
| 607 | MagickBooleanType |
| 608 | status; |
| 609 | |
| 610 | QuantumInfo |
| 611 | *quantum_info; |
| 612 | |
| 613 | register const PixelPacket |
| 614 | *p; |
| 615 | |
| 616 | size_t |
| 617 | length; |
| 618 | |
| 619 | ssize_t |
| 620 | count, |
| 621 | offset; |
| 622 | |
| 623 | unsigned char |
| 624 | *pixels; |
| 625 | |
| 626 | /* |
| 627 | Open output image file. |
| 628 | */ |
| 629 | assert(image_info != (const ImageInfo *) NULL); |
| 630 | assert(image_info->signature == MagickSignature); |
| 631 | assert(image != (Image *) NULL); |
| 632 | assert(image->signature == MagickSignature); |
| 633 | if (image->debug != MagickFalse) |
| 634 | (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); |
| 635 | status=OpenBlob(image_info,image,WriteBinaryBlobMode,&image->exception); |
| 636 | if (status == MagickFalse) |
| 637 | return(status); |
| 638 | if (image->colorspace != RGBColorspace) |
| 639 | (void) TransformImageColorspace(image,RGBColorspace); |
| 640 | /* |
| 641 | Allocate image memory. |
| 642 | */ |
| 643 | fits_info=(char *) AcquireQuantumMemory(FITSBlocksize,sizeof(*fits_info)); |
| 644 | if (fits_info == (char *) NULL) |
| 645 | ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed"); |
| 646 | (void) ResetMagickMemory(fits_info,' ',FITSBlocksize*sizeof(*fits_info)); |
| 647 | /* |
| 648 | Initialize image header. |
| 649 | */ |
| 650 | image->depth=GetImageQuantumDepth(image,MagickFalse); |
| 651 | quantum_info=AcquireQuantumInfo((const ImageInfo *) NULL,image); |
| 652 | if (quantum_info == (QuantumInfo *) NULL) |
| 653 | ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed"); |
| 654 | offset=0; |
| 655 | (void) FormatMagickString(header,FITSBlocksize, |
| 656 | "SIMPLE = T"); |
| 657 | (void) strncpy(fits_info+offset,header,strlen(header)); |
| 658 | offset+=80; |
| 659 | (void) FormatMagickString(header,FITSBlocksize,"BITPIX = %10ld", |
| 660 | (quantum_info->format == FloatingPointQuantumFormat ? -1 : 1)*image->depth); |
| 661 | (void) strncpy(fits_info+offset,header,strlen(header)); |
| 662 | offset+=80; |
| 663 | (void) FormatMagickString(header,FITSBlocksize,"NAXIS = %10lu", |
| 664 | 2UL); |
| 665 | (void) strncpy(fits_info+offset,header,strlen(header)); |
| 666 | offset+=80; |
| 667 | (void) FormatMagickString(header,FITSBlocksize,"NAXIS1 = %10lu", |
| 668 | image->columns); |
| 669 | (void) strncpy(fits_info+offset,header,strlen(header)); |
| 670 | offset+=80; |
| 671 | (void) FormatMagickString(header,FITSBlocksize,"NAXIS2 = %10lu", |
| 672 | image->rows); |
| 673 | (void) strncpy(fits_info+offset,header,strlen(header)); |
| 674 | offset+=80; |
| 675 | (void) FormatMagickString(header,FITSBlocksize,"BSCALE = %E",1.0); |
| 676 | (void) strncpy(fits_info+offset,header,strlen(header)); |
| 677 | offset+=80; |
| 678 | (void) FormatMagickString(header,FITSBlocksize,"BZERO = %E", |
| 679 | image->depth > 8 ? GetFITSPixelRange(image->depth) : 0.0); |
| 680 | (void) strncpy(fits_info+offset,header,strlen(header)); |
| 681 | offset+=80; |
| 682 | (void) FormatMagickString(header,FITSBlocksize,"DATAMAX = %E", |
| 683 | 1.0*((MagickOffsetType) GetQuantumRange(image->depth))); |
| 684 | (void) strncpy(fits_info+offset,header,strlen(header)); |
| 685 | offset+=80; |
| 686 | (void) FormatMagickString(header,FITSBlocksize,"DATAMIN = %E",0.0); |
| 687 | (void) strncpy(fits_info+offset,header,strlen(header)); |
| 688 | offset+=80; |
| 689 | if (image->endian == LSBEndian) |
| 690 | { |
| 691 | (void) FormatMagickString(header,FITSBlocksize,"XENDIAN = 'SMALL'"); |
| 692 | (void) strncpy(fits_info+offset,header,strlen(header)); |
| 693 | offset+=80; |
| 694 | } |
| 695 | (void) FormatMagickString(header,FITSBlocksize,"HISTORY %.72s", |
| 696 | GetMagickVersion((unsigned long *) NULL)); |
| 697 | (void) strncpy(fits_info+offset,header,strlen(header)); |
| 698 | offset+=80; |
| 699 | (void) strncpy(header,"END",FITSBlocksize); |
| 700 | (void) strncpy(fits_info+offset,header,strlen(header)); |
| 701 | offset+=80; |
| 702 | (void) WriteBlob(image,FITSBlocksize,(unsigned char *) fits_info); |
| 703 | /* |
| 704 | Convert image to fits scale PseudoColor class. |
| 705 | */ |
| 706 | pixels=GetQuantumPixels(quantum_info); |
| 707 | length=GetQuantumExtent(image,quantum_info,GrayQuantum); |
| 708 | for (y=(long) image->rows-1; y >= 0; y--) |
| 709 | { |
| 710 | p=GetVirtualPixels(image,0,y,image->columns,1,&image->exception); |
| 711 | if (p == (const PixelPacket *) NULL) |
| 712 | break; |
| 713 | length=ExportQuantumPixels(image,(const CacheView *) NULL,quantum_info, |
| 714 | GrayQuantum,pixels,&image->exception); |
| 715 | if (image->depth == 16) |
| 716 | SetFITSUnsignedPixels(image->columns,image->depth,pixels); |
| 717 | if (((image->depth == 32) || (image->depth == 64)) && |
| 718 | (quantum_info->format != FloatingPointQuantumFormat)) |
| 719 | SetFITSUnsignedPixels(image->columns,image->depth,pixels); |
| 720 | count=WriteBlob(image,length,pixels); |
| 721 | if (count != (ssize_t) length) |
| 722 | break; |
| 723 | status=SetImageProgress(image,SaveImageTag,y,image->rows); |
| 724 | if (status == MagickFalse) |
| 725 | break; |
| 726 | } |
| 727 | quantum_info=DestroyQuantumInfo(quantum_info); |
| 728 | length=(size_t) (FITSBlocksize-TellBlob(image) % FITSBlocksize); |
| 729 | if (length != 0) |
| 730 | { |
| 731 | (void) ResetMagickMemory(fits_info,0,length*sizeof(*fits_info)); |
| 732 | (void) WriteBlob(image,length,(unsigned char *) fits_info); |
| 733 | } |
| 734 | fits_info=DestroyString(fits_info); |
| 735 | (void) CloseBlob(image); |
| 736 | return(MagickTrue); |
| 737 | } |