granicus.if.org Git - imagemagick/blob - coders/mat.c

   1 /*
   2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   3 %                                                                             %
   4 %                                                                             %
   5 %                  M   M   AAA   TTTTT  L       AAA   BBBB                    %
   6 %                  MM MM  A   A    T    L      A   A  B   B                   %
   7 %                  M M M  AAAAA    T    L      AAAAA  BBBB                    %
   8 %                  M   M  A   A    T    L      A   A  B   B                   %
   9 %                  M   M  A   A    T    LLLLL  A   A  BBBB                    %
  10 %                                                                             %
  11 %                                                                             %
  12 %                        Read MATLAB Image Format                             %
  13 %                                                                             %
  14 %                              Software Design                                %
  15 %                              Jaroslav Fojtik                                %
  16 %                                2001-2008                                    %
  17 %                                                                             %
  18 %                                                                             %
  19 %  Permission is hereby granted, free of charge, to any person obtaining a    %
  20 %  copy of this software and associated documentation files ("ImageMagick"),  %
  21 %  to deal in ImageMagick without restriction, including without limitation   %
  22 %  the rights to use, copy, modify, merge, publish, distribute, sublicense,   %
  23 %  and/or sell copies of ImageMagick, and to permit persons to whom the       %
  24 %  ImageMagick is furnished to do so, subject to the following conditions:    %
  25 %                                                                             %
  26 %  The above copyright notice and this permission notice shall be included in %
  27 %  all copies or substantial portions of ImageMagick.                         %
  28 %                                                                             %
  29 %  The software is provided "as is", without warranty of any kind, express or %
  30 %  implied, including but not limited to the warranties of merchantability,   %
  31 %  fitness for a particular purpose and noninfringement.  In no event shall   %
  32 %  ImageMagick Studio be liable for any claim, damages or other liability,    %
  33 %  whether in an action of contract, tort or otherwise, arising from, out of  %
  34 %  or in connection with ImageMagick or the use or other dealings in          %
  35 %  ImageMagick.                                                               %
  36 %                                                                             %
  37 %  Except as contained in this notice, the name of the ImageMagick Studio     %
  38 %  shall not be used in advertising or otherwise to promote the sale, use or  %
  39 %  other dealings in ImageMagick without prior written authorization from the %
  40 %  ImageMagick Studio.                                                        %
  41 %                                                                             %
  42 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  43 %
  44 %
  45 */
  46 \f
  47 /*
  48   Include declarations.
  49 */
  50 #include "MagickCore/studio.h"
  51 #include "MagickCore/attribute.h"
  52 #include "MagickCore/blob.h"
  53 #include "MagickCore/blob-private.h"
  54 #include "MagickCore/cache.h"
  55 #include "MagickCore/color-private.h"
  56 #include "MagickCore/colormap.h"
  57 #include "MagickCore/colorspace-private.h"
  58 #include "MagickCore/distort.h"
  59 #include "MagickCore/exception.h"
  60 #include "MagickCore/exception-private.h"
  61 #include "MagickCore/image.h"
  62 #include "MagickCore/image-private.h"
  63 #include "MagickCore/list.h"
  64 #include "MagickCore/magick.h"
  65 #include "MagickCore/memory_.h"
  66 #include "MagickCore/monitor.h"
  67 #include "MagickCore/monitor-private.h"
  68 #include "MagickCore/pixel-accessor.h"
  69 #include "MagickCore/quantum.h"
  70 #include "MagickCore/quantum-private.h"
  71 #include "MagickCore/option.h"
  72 #include "MagickCore/pixel.h"
  73 #include "MagickCore/resource_.h"
  74 #include "MagickCore/static.h"
  75 #include "MagickCore/string_.h"
  76 #include "MagickCore/module.h"
  77 #include "MagickCore/transform.h"
  78 #include "MagickCore/utility-private.h"
  79 #if defined(MAGICKCORE_ZLIB_DELEGATE)
  80  #include "zlib.h"
  81 #endif
  82 \f
  83 /*
  84   Forward declaration.
  85 */
  86 static MagickBooleanType
  87   WriteMATImage(const ImageInfo *,Image *,ExceptionInfo *);
  88
  89
  90 /* Auto coloring method, sorry this creates some artefact inside data
  91 MinReal+j*MaxComplex = red  MaxReal+j*MaxComplex = black
  92 MinReal+j*0 = white          MaxReal+j*0 = black
  93 MinReal+j*MinComplex = blue  MaxReal+j*MinComplex = black
  94 */
  95
  96 typedef struct
  97 {
  98   char identific[124];
  99   unsigned short Version;
 100   char EndianIndicator[2];
 101   unsigned int DataType;
 102   unsigned int ObjectSize;
 103   unsigned int unknown1;
 104   unsigned int unknown2;
 105
 106   unsigned short unknown5;
 107   unsigned char StructureFlag;
 108   unsigned char StructureClass;
 109   unsigned int unknown3;
 110   unsigned int unknown4;
 111   unsigned int DimFlag;
 112
 113   unsigned int SizeX;
 114   unsigned int SizeY;
 115   unsigned short Flag1;
 116   unsigned short NameFlag;
 117 }
 118 MATHeader;
 119
 120 static const char *MonthsTab[12]={"Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"};
 121 static const char *DayOfWTab[7]={"Sun","Mon","Tue","Wed","Thu","Fri","Sat"};
 122 static const char *OsDesc=
 123 #if defined(MAGICKCORE_WINDOWS_SUPPORT)
 124     "PCWIN";
 125 #else
 126  #ifdef __APPLE__
 127     "MAC";
 128  #else
 129     "LNX86";
 130  #endif
 131 #endif
 132
 133 typedef enum
 134   {
 135     miINT8 = 1,      /* 8 bit signed */
 136     miUINT8,      /* 8 bit unsigned */
 137     miINT16,      /* 16 bit signed */
 138     miUINT16,      /* 16 bit unsigned */
 139     miINT32,      /* 32 bit signed */
 140     miUINT32,      /* 32 bit unsigned */
 141     miSINGLE,      /* IEEE 754 single precision float */
 142     miRESERVE1,
 143     miDOUBLE,      /* IEEE 754 double precision float */
 144     miRESERVE2,
 145     miRESERVE3,
 146     miINT64,      /* 64 bit signed */
 147     miUINT64,      /* 64 bit unsigned */
 148     miMATRIX,            /* MATLAB array */
 149     miCOMPRESSED,          /* Compressed Data */
 150     miUTF8,            /* Unicode UTF-8 Encoded Character Data */
 151     miUTF16,            /* Unicode UTF-16 Encoded Character Data */
 152     miUTF32      /* Unicode UTF-32 Encoded Character Data */
 153   } mat5_data_type;
 154
 155 typedef enum
 156   {
 157     mxCELL_CLASS=1,    /* cell array */
 158     mxSTRUCT_CLASS,    /* structure */
 159     mxOBJECT_CLASS,    /* object */
 160     mxCHAR_CLASS,    /* character array */
 161     mxSPARSE_CLASS,    /* sparse array */
 162     mxDOUBLE_CLASS,    /* double precision array */
 163     mxSINGLE_CLASS,    /* single precision floating point */
 164     mxINT8_CLASS,    /* 8 bit signed integer */
 165     mxUINT8_CLASS,    /* 8 bit unsigned integer */
 166     mxINT16_CLASS,    /* 16 bit signed integer */
 167     mxUINT16_CLASS,    /* 16 bit unsigned integer */
 168     mxINT32_CLASS,    /* 32 bit signed integer */
 169     mxUINT32_CLASS,    /* 32 bit unsigned integer */
 170     mxINT64_CLASS,    /* 64 bit signed integer */
 171     mxUINT64_CLASS,    /* 64 bit unsigned integer */
 172     mxFUNCTION_CLASS            /* Function handle */
 173   } arrayclasstype;
 174
 175 #define FLAG_COMPLEX 0x8
 176 #define FLAG_GLOBAL  0x4
 177 #define FLAG_LOGICAL 0x2
 178
 179 static const QuantumType z2qtype[4] = {GrayQuantum, BlueQuantum, GreenQuantum, RedQuantum};
 180
 181
 182 static void InsertComplexDoubleRow(Image *image,double *p,int y,double MinVal,
 183   double MaxVal,ExceptionInfo *exception)
 184 {
 185
 186   double f;
 187   int x;
 188   register Quantum *q;
 189
 190   if (MinVal == 0)
 191     MinVal = -1;
 192   if (MaxVal == 0)
 193     MaxVal = 1;
 194
 195   q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 196   if (q == (Quantum *) NULL)
 197     return;
 198   for (x = 0; x < (ssize_t) image->columns; x++)
 199   {
 200     if (*p > 0)
 201     {
 202       f = (*p / MaxVal) * (QuantumRange-GetPixelRed(image,q));
 203       if (f + GetPixelRed(image,q) > QuantumRange)
 204         SetPixelRed(image,QuantumRange,q);
 205       else
 206         SetPixelRed(image,GetPixelRed(image,q)+(int) f,q);
 207       if ((int) f / 2.0 > GetPixelGreen(image,q))
 208         {
 209           SetPixelGreen(image,0,q);
 210           SetPixelBlue(image,0,q);
 211         }
 212       else
 213         {
 214           SetPixelBlue(image,GetPixelBlue(image,q)-(int) (f/2.0),q);
 215           SetPixelGreen(image,GetPixelBlue(image,q),q);
 216         }
 217     }
 218     if (*p < 0)
 219     {
 220       f = (*p / MinVal) * (QuantumRange-GetPixelBlue(image,q));
 221       if (f+GetPixelBlue(image,q) > QuantumRange)
 222         SetPixelBlue(image,QuantumRange,q);
 223       else
 224         SetPixelBlue(image,GetPixelBlue(image,q)+(int) f,q);
 225       if ((int) f / 2.0 > GetPixelGreen(image,q))
 226         {
 227           SetPixelRed(image,0,q);
 228           SetPixelGreen(image,0,q);
 229         }
 230       else
 231         {
 232           SetPixelRed(image,GetPixelRed(image,q)-(int) (f/2.0),q);
 233           SetPixelGreen(image,GetPixelRed(image,q),q);
 234         }
 235     }
 236     p++;
 237     q+=GetPixelChannels(image);
 238   }
 239   if (!SyncAuthenticPixels(image,exception))
 240     return;
 241   return;
 242 }
 243
 244
 245 static void InsertComplexFloatRow(Image *image,float *p,int y,double MinVal,
 246   double MaxVal,ExceptionInfo *exception)
 247 {
 248   double f;
 249   int x;
 250   register Quantum *q;
 251
 252   if (MinVal == 0)
 253     MinVal = -1;
 254   if (MaxVal == 0)
 255     MaxVal = 1;
 256
 257   q = QueueAuthenticPixels(image, 0, y, image->columns, 1,exception);
 258   if (q == (Quantum *) NULL)
 259     return;
 260   for (x = 0; x < (ssize_t) image->columns; x++)
 261   {
 262     if (*p > 0)
 263     {
 264       f = (*p / MaxVal) * (QuantumRange-GetPixelRed(image,q));
 265       if (f+GetPixelRed(image,q) > QuantumRange)
 266         SetPixelRed(image,QuantumRange,q);
 267       else
 268         SetPixelRed(image,GetPixelRed(image,q)+(int) f,q);
 269       if ((int) f / 2.0 > GetPixelGreen(image,q))
 270         {
 271           SetPixelGreen(image,0,q);
 272           SetPixelBlue(image,0,q);
 273         }
 274       else
 275         {
 276           SetPixelBlue(image,GetPixelBlue(image,q)-(int) (f/2.0),q);
 277           SetPixelGreen(image,GetPixelBlue(image,q),q);
 278         }
 279     }
 280     if (*p < 0)
 281     {
 282       f = (*p / MaxVal) * (QuantumRange - GetPixelBlue(image,q));
 283       if (f + GetPixelBlue(image,q) > QuantumRange)
 284         SetPixelBlue(image,QuantumRange,q);
 285       else
 286         SetPixelBlue(image,GetPixelBlue(image,q)+
 287           (int) f,q);
 288       if ((int) f / 2.0 > GetPixelGreen(image,q))
 289         {
 290           SetPixelGreen(image,0,q);
 291           SetPixelRed(image,0,q);
 292         }
 293       else
 294         {
 295           SetPixelRed(image,GetPixelRed(image,q)-(int) (f/2.0),q);
 296           SetPixelGreen(image,GetPixelRed(image,q),q);
 297         }
 298     }
 299     p++;
 300     q++;
 301   }
 302   if (!SyncAuthenticPixels(image,exception))
 303     return;
 304   return;
 305 }
 306
 307
 308 /************** READERS ******************/
 309
 310 /* This function reads one block of floats*/
 311 static void ReadBlobFloatsLSB(Image * image, size_t len, float *data)
 312 {
 313   while (len >= 4)
 314   {
 315     *data++ = ReadBlobFloat(image);
 316     len -= sizeof(float);
 317   }
 318   if (len > 0)
 319     (void) SeekBlob(image, len, SEEK_CUR);
 320 }
 321
 322 static void ReadBlobFloatsMSB(Image * image, size_t len, float *data)
 323 {
 324   while (len >= 4)
 325   {
 326     *data++ = ReadBlobFloat(image);
 327     len -= sizeof(float);
 328   }
 329   if (len > 0)
 330     (void) SeekBlob(image, len, SEEK_CUR);
 331 }
 332
 333 /* This function reads one block of doubles*/
 334 static void ReadBlobDoublesLSB(Image * image, size_t len, double *data)
 335 {
 336   while (len >= 8)
 337   {
 338     *data++ = ReadBlobDouble(image);
 339     len -= sizeof(double);
 340   }
 341   if (len > 0)
 342     (void) SeekBlob(image, len, SEEK_CUR);
 343 }
 344
 345 static void ReadBlobDoublesMSB(Image * image, size_t len, double *data)
 346 {
 347   while (len >= 8)
 348   {
 349     *data++ = ReadBlobDouble(image);
 350     len -= sizeof(double);
 351   }
 352   if (len > 0)
 353     (void) SeekBlob(image, len, SEEK_CUR);
 354 }
 355
 356 /* Calculate minimum and maximum from a given block of data */
 357 static void CalcMinMax(Image *image, int endian_indicator, int SizeX, int SizeY, size_t CellType, unsigned ldblk, void *BImgBuff, double *Min, double *Max)
 358 {
 359 MagickOffsetType filepos;
 360 int i, x;
 361 void (*ReadBlobDoublesXXX)(Image * image, size_t len, double *data);
 362 void (*ReadBlobFloatsXXX)(Image * image, size_t len, float *data);
 363 double *dblrow;
 364 float *fltrow;
 365
 366   if (endian_indicator == LSBEndian)
 367   {
 368     ReadBlobDoublesXXX = ReadBlobDoublesLSB;
 369     ReadBlobFloatsXXX = ReadBlobFloatsLSB;
 370   }
 371   else    /* MI */
 372   {
 373     ReadBlobDoublesXXX = ReadBlobDoublesMSB;
 374     ReadBlobFloatsXXX = ReadBlobFloatsMSB;
 375   }
 376
 377   filepos = TellBlob(image);     /* Please note that file seeking occurs only in the case of doubles */
 378   for (i = 0; i < SizeY; i++)
 379   {
 380     if (CellType==miDOUBLE)
 381     {
 382       ReadBlobDoublesXXX(image, ldblk, (double *)BImgBuff);
 383       dblrow = (double *)BImgBuff;
 384       if (i == 0)
 385       {
 386         *Min = *Max = *dblrow;
 387       }
 388       for (x = 0; x < SizeX; x++)
 389       {
 390         if (*Min > *dblrow)
 391           *Min = *dblrow;
 392         if (*Max < *dblrow)
 393           *Max = *dblrow;
 394         dblrow++;
 395       }
 396     }
 397     if (CellType==miSINGLE)
 398     {
 399       ReadBlobFloatsXXX(image, ldblk, (float *)BImgBuff);
 400       fltrow = (float *)BImgBuff;
 401       if (i == 0)
 402       {
 403         *Min = *Max = *fltrow;
 404       }
 405     for (x = 0; x < (ssize_t) SizeX; x++)
 406       {
 407         if (*Min > *fltrow)
 408           *Min = *fltrow;
 409         if (*Max < *fltrow)
 410           *Max = *fltrow;
 411         fltrow++;
 412       }
 413     }
 414   }
 415   (void) SeekBlob(image, filepos, SEEK_SET);
 416 }
 417
 418
 419 static void FixSignedValues(const Image *image,Quantum *q, int y)
 420 {
 421   while(y-->0)
 422   {
 423      /* Please note that negative values will overflow
 424         Q=8; QuantumRange=255: <0;127> + 127+1 = <128; 255>
 425            <-1;-128> + 127+1 = <0; 127> */
 426     SetPixelRed(image,GetPixelRed(image,q)+QuantumRange/2+1,q);
 427     SetPixelGreen(image,GetPixelGreen(image,q)+QuantumRange/2+1,q);
 428     SetPixelBlue(image,GetPixelBlue(image,q)+QuantumRange/2+1,q);
 429     q++;
 430   }
 431 }
 432
 433
 434 /** Fix whole row of logical/binary data. It means pack it. */
 435 static void FixLogical(unsigned char *Buff,int ldblk)
 436 {
 437 unsigned char mask=128;
 438 unsigned char *BuffL = Buff;
 439 unsigned char val = 0;
 440
 441   while(ldblk-->0)
 442   {
 443     if(*Buff++ != 0)
 444       val |= mask;
 445
 446     mask >>= 1;
 447     if(mask==0)
 448     {
 449       *BuffL++ = val;
 450       val = 0;
 451       mask = 128;
 452     }
 453
 454   }
 455   *BuffL = val;
 456 }
 457
 458 #if defined(MAGICKCORE_ZLIB_DELEGATE)
 459 static voidpf AcquireZIPMemory(voidpf context,unsigned int items,
 460   unsigned int size)
 461 {
 462   (void) context;
 463   return((voidpf) AcquireQuantumMemory(items,size));
 464 }
 465
 466 static void RelinquishZIPMemory(voidpf context,voidpf memory)
 467 {
 468   (void) context;
 469   memory=RelinquishMagickMemory(memory);
 470 }
 471 #endif
 472
 473 #if defined(MAGICKCORE_ZLIB_DELEGATE)
 474 /** This procedure decompreses an image block for a new MATLAB format. */
 475 static Image *decompress_block(Image *orig, unsigned int *Size, ImageInfo *clone_info, ExceptionInfo *exception)
 476 {
 477
 478 Image *image2;
 479 void *cache_block, *decompress_block;
 480 z_stream zip_info;
 481 FILE *mat_file;
 482 size_t magick_size;
 483 size_t extent;
 484 int file;
 485
 486 int status;
 487 int zip_status;
 488 ssize_t TotalSize = 0;
 489
 490   if(clone_info==NULL) return NULL;
 491   if(clone_info->file)    /* Close file opened from previous transaction. */
 492   {
 493     fclose(clone_info->file);
 494     clone_info->file = NULL;
 495     (void) remove_utf8(clone_info->filename);
 496   }
 497
 498   cache_block = AcquireQuantumMemory((size_t)(*Size < 16384) ? *Size: 16384,sizeof(unsigned char *));
 499   if(cache_block==NULL) return NULL;
 500   decompress_block = AcquireQuantumMemory((size_t)(4096),sizeof(unsigned char *));
 501   if(decompress_block==NULL)
 502   {
 503     RelinquishMagickMemory(cache_block);
 504     return NULL;
 505   }
 506
 507   mat_file=0;
 508   file = AcquireUniqueFileResource(clone_info->filename);
 509   if (file != -1)
 510     mat_file = fdopen(file,"w");
 511   if(!mat_file)
 512   {
 513     RelinquishMagickMemory(cache_block);
 514     RelinquishMagickMemory(decompress_block);
 515     (void) LogMagickEvent(CoderEvent,GetMagickModule(),"Cannot create file stream for decompressed image");
 516     return NULL;
 517   }
 518
 519   zip_info.zalloc=AcquireZIPMemory;
 520   zip_info.zfree=RelinquishZIPMemory;
 521   zip_info.opaque = (voidpf) NULL;
 522   zip_status = inflateInit(&zip_info);
 523   if (zip_status != Z_OK)
 524     {
 525       RelinquishMagickMemory(cache_block);
 526       RelinquishMagickMemory(decompress_block);
 527       (void) ThrowMagickException(exception,GetMagickModule(),CorruptImageError,
 528         "UnableToUncompressImage","`%s'",clone_info->filename);
 529       (void) fclose(mat_file);
 530       RelinquishUniqueFileResource(clone_info->filename);
 531       return NULL;
 532     }
 533   /* zip_info.next_out = 8*4;*/
 534
 535   zip_info.avail_in = 0;
 536   zip_info.total_out = 0;
 537   while(*Size>0 && !EOFBlob(orig))
 538   {
 539     magick_size = ReadBlob(orig, (*Size < 16384) ? *Size : 16384, (unsigned char *) cache_block);
 540     if (magick_size == 0)
 541       break;
 542     zip_info.next_in = (Bytef *) cache_block;
 543     zip_info.avail_in = (uInt) magick_size;
 544
 545     while(zip_info.avail_in>0)
 546     {
 547       zip_info.avail_out = 4096;
 548       zip_info.next_out = (Bytef *) decompress_block;
 549       zip_status = inflate(&zip_info,Z_NO_FLUSH);
 550       if ((zip_status != Z_OK) && (zip_status != Z_STREAM_END))
 551         break;
 552       extent=fwrite(decompress_block, 4096-zip_info.avail_out, 1, mat_file);
 553       (void) extent;
 554       TotalSize += 4096-zip_info.avail_out;
 555
 556       if(zip_status == Z_STREAM_END) goto DblBreak;
 557     }
 558     if ((zip_status != Z_OK) && (zip_status != Z_STREAM_END))
 559       break;
 560
 561     *Size -= (unsigned int) magick_size;
 562   }
 563 DblBreak:
 564
 565   inflateEnd(&zip_info);
 566   (void)fclose(mat_file);
 567   RelinquishMagickMemory(cache_block);
 568   RelinquishMagickMemory(decompress_block);
 569   *Size = TotalSize;
 570
 571   if((clone_info->file=fopen(clone_info->filename,"rb"))==NULL) goto UnlinkFile;
 572   if( (image2 = AcquireImage(clone_info,exception))==NULL ) goto EraseFile;
 573   status = OpenBlob(clone_info,image2,ReadBinaryBlobMode,exception);
 574   if (status == MagickFalse)
 575   {
 576     DeleteImageFromList(&image2);
 577 EraseFile:
 578     fclose(clone_info->file);
 579     clone_info->file = NULL;
 580 UnlinkFile:
 581     RelinquishUniqueFileResource(clone_info->filename);
 582     return NULL;
 583   }
 584
 585   return image2;
 586 }
 587 #endif
 588
 589 static Image *ReadMATImageV4(const ImageInfo *image_info,Image *image,
 590   ExceptionInfo *exception)
 591 {
 592   typedef struct {
 593     unsigned char Type[4];
 594     unsigned int nRows;
 595     unsigned int nCols;
 596     unsigned int imagf;
 597     unsigned int nameLen;
 598   } MAT4_HDR;
 599
 600   long
 601     ldblk;
 602
 603   EndianType
 604     endian;
 605
 606   Image
 607     *rotated_image;
 608
 609   MagickBooleanType
 610     status;
 611
 612   MAT4_HDR
 613     HDR;
 614
 615   QuantumInfo
 616     *quantum_info;
 617
 618   QuantumFormatType
 619     format_type;
 620
 621   register ssize_t
 622     i;
 623
 624   ssize_t
 625     count,
 626     y;
 627
 628   unsigned char
 629     *pixels;
 630
 631   unsigned int
 632     depth;
 633
 634
 635   quantum_info=(QuantumInfo *) NULL;
 636   (void) SeekBlob(image,0,SEEK_SET);
 637   while (EOFBlob(image) == MagickFalse)
 638   {
 639     /*
 640      Object parser loop.
 641     */
 642     ldblk=ReadBlobLSBLong(image);
 643     if ((ldblk > 9999) || (ldblk < 0))
 644       break;
 645     HDR.Type[3]=ldblk % 10; ldblk /= 10;  /* T digit */
 646     HDR.Type[2]=ldblk % 10; ldblk /= 10;  /* P digit */
 647     HDR.Type[1]=ldblk % 10; ldblk /= 10;  /* O digit */
 648     HDR.Type[0]=ldblk;        /* M digit */
 649     if (HDR.Type[3] != 0)
 650       break;  /* Data format */
 651     if (HDR.Type[2] != 0)
 652       break;  /* Always 0 */
 653     if (HDR.Type[0] == 0)
 654       {
 655         HDR.nRows=ReadBlobLSBLong(image);
 656         HDR.nCols=ReadBlobLSBLong(image);
 657         HDR.imagf=ReadBlobLSBLong(image);
 658         HDR.nameLen=ReadBlobLSBLong(image);
 659         endian=LSBEndian;
 660       }
 661     else
 662       {
 663         HDR.nRows=ReadBlobMSBLong(image);
 664         HDR.nCols=ReadBlobMSBLong(image);
 665         HDR.imagf=ReadBlobMSBLong(image);
 666         HDR.nameLen=ReadBlobMSBLong(image);
 667         endian=MSBEndian;
 668       }
 669     if ((HDR.imagf != 0) && (HDR.imagf != 1))
 670       break;
 671     if (HDR.nameLen > 0xFFFF)
 672       return(DestroyImageList(image));
 673     for (i=0; i < (ssize_t) HDR.nameLen; i++)
 674     {
 675       int
 676         byte;
 677
 678       /*
 679         Skip matrix name.
 680       */
 681       byte=ReadBlobByte(image);
 682       if (byte == EOF)
 683         {
 684           ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
 685             image->filename);
 686           break;
 687         }
 688     }
 689     image->columns=(size_t) HDR.nRows;
 690     image->rows=(size_t) HDR.nCols;
 691     if ((image->columns == 0) || (image->rows == 0))
 692       return(DestroyImageList(image));
 693     if (image_info->ping != MagickFalse)
 694       {
 695         Swap(image->columns,image->rows);
 696         if(HDR.imagf==1) ldblk *= 2;
 697         SeekBlob(image, HDR.nCols*ldblk, SEEK_CUR);
 698         if ((image->columns == 0) || (image->rows == 0))
 699           return(image->previous == (Image *) NULL ? DestroyImageList(image)
 700             : image);
 701         goto skip_reading_current;
 702       }
 703     status=SetImageExtent(image,image->columns,image->rows,exception);
 704     if (status == MagickFalse)
 705       return(DestroyImageList(image));
 706     (void) SetImageBackgroundColor(image,exception);
 707     (void) SetImageColorspace(image,GRAYColorspace,exception);
 708     quantum_info=AcquireQuantumInfo(image_info,image);
 709     if (quantum_info == (QuantumInfo *) NULL)
 710       return(DestroyImageList(image));
 711     switch(HDR.Type[1])
 712     {
 713       case 0:
 714         format_type=FloatingPointQuantumFormat;
 715         depth=64;
 716         break;
 717       case 1:
 718         format_type=FloatingPointQuantumFormat;
 719         depth=32;
 720         break;
 721       case 2:
 722         format_type=UnsignedQuantumFormat;
 723         depth=16;
 724         break;
 725       case 3:
 726         format_type=SignedQuantumFormat;
 727         depth=16;
 728         break;
 729       case 4:
 730         format_type=UnsignedQuantumFormat;
 731         depth=8;
 732         break;
 733       default:
 734         format_type=UnsignedQuantumFormat;
 735         depth=8;
 736         break;
 737     }
 738     image->depth=depth;
 739     if (HDR.Type[0] != 0)
 740       SetQuantumEndian(image,quantum_info,MSBEndian);
 741     status=SetQuantumFormat(image,quantum_info,format_type);
 742     status=SetQuantumDepth(image,quantum_info,depth);
 743     status=SetQuantumEndian(image,quantum_info,endian);
 744     SetQuantumScale(quantum_info,1.0);
 745     pixels=(unsigned char *) GetQuantumPixels(quantum_info);
 746     for (y=0; y < (ssize_t) image->rows; y++)
 747     {
 748       register Quantum
 749         *magick_restrict q;
 750
 751       count=ReadBlob(image,depth/8*image->columns,(char *) pixels);
 752       if (count == -1)
 753         break;
 754       q=QueueAuthenticPixels(image,0,image->rows-y-1,image->columns,1,
 755         exception);
 756       if (q == (Quantum *) NULL)
 757         break;
 758       (void) ImportQuantumPixels(image,(CacheView *) NULL,quantum_info,
 759         GrayQuantum,pixels,exception);
 760       if ((HDR.Type[1] == 2) || (HDR.Type[1] == 3))
 761         FixSignedValues(image,q,(int) image->columns);
 762       if (SyncAuthenticPixels(image,exception) == MagickFalse)
 763         break;
 764       if (image->previous == (Image *) NULL)
 765         {
 766           status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
 767             image->rows);
 768           if (status == MagickFalse)
 769             break;
 770         }
 771     }
 772     if (HDR.imagf == 1)
 773       for (y=0; y < (ssize_t) image->rows; y++)
 774       {
 775         /*
 776           Read complex pixels.
 777         */
 778         count=ReadBlob(image,depth/8*image->columns,(char *) pixels);
 779         if (count == -1)
 780           break;
 781         if (HDR.Type[1] == 0)
 782           InsertComplexDoubleRow(image,(double *) pixels,y,0,0,exception);
 783         else
 784           InsertComplexFloatRow(image,(float *) pixels,y,0,0,exception);
 785       }
 786     if (quantum_info != (QuantumInfo *) NULL)
 787       quantum_info=DestroyQuantumInfo(quantum_info);
 788     if (EOFBlob(image) != MagickFalse)
 789       {
 790         ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
 791           image->filename);
 792         break;
 793       }
 794     rotated_image=RotateImage(image,90.0,exception);
 795     if (rotated_image != (Image *) NULL)
 796       {
 797         rotated_image->page.x=0;
 798         rotated_image->page.y=0;
 799         rotated_image->colors = image->colors;
 800         DestroyBlob(rotated_image);
 801         rotated_image->blob=ReferenceBlob(image->blob);
 802         AppendImageToList(&image,rotated_image);
 803         DeleteImageFromList(&image);
 804       }
 805     /*
 806       Proceed to next image.
 807     */
 808     if (image_info->number_scenes != 0)
 809       if (image->scene >= (image_info->scene+image_info->number_scenes-1))
 810         break;
 811     /*
 812       Allocate next image structure.
 813     */
 814 skip_reading_current:
 815     AcquireNextImage(image_info,image,exception);
 816     if (GetNextImageInList(image) == (Image *) NULL)
 817       return(DestroyImageList(image));
 818     image=SyncNextImageInList(image);
 819     status=SetImageProgress(image,LoadImagesTag,TellBlob(image),
 820       GetBlobSize(image));
 821     if (status == MagickFalse)
 822       break;
 823   }
 824   (void) CloseBlob(image);
 825   return(GetFirstImageInList(image));
 826 }
 827 \f
 828 /*
 829 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 830 %                                                                             %
 831 %                                                                             %
 832 %                                                                             %
 833 %   R e a d M A T L A B i m a g e                                             %
 834 %                                                                             %
 835 %                                                                             %
 836 %                                                                             %
 837 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 838 %
 839 %  ReadMATImage() reads an MAT X image file and returns it.  It
 840 %  allocates the memory necessary for the new Image structure and returns a
 841 %  pointer to the new image.
 842 %
 843 %  The format of the ReadMATImage method is:
 844 %
 845 %      Image *ReadMATImage(const ImageInfo *image_info,ExceptionInfo *exception)
 846 %
 847 %  A description of each parameter follows:
 848 %
 849 %    o image:  Method ReadMATImage returns a pointer to the image after
 850 %      reading. A null image is returned if there is a memory shortage or if
 851 %      the image cannot be read.
 852 %
 853 %    o image_info: Specifies a pointer to a ImageInfo structure.
 854 %
 855 %    o exception: return any errors or warnings in this structure.
 856 %
 857 */
 858 static Image *ReadMATImage(const ImageInfo *image_info,ExceptionInfo *exception)
 859 {
 860   Image *image, *image2=NULL,
 861    *rotated_image;
 862   register Quantum *q;
 863
 864   unsigned int status;
 865   MATHeader MATLAB_HDR;
 866   size_t size;
 867   size_t CellType;
 868   QuantumInfo *quantum_info;
 869   ImageInfo *clone_info;
 870   int i;
 871   ssize_t ldblk;
 872   unsigned char *BImgBuff = NULL;
 873   double MinVal, MaxVal;
 874   unsigned z, z2;
 875   unsigned Frames;
 876   int logging;
 877   int sample_size;
 878   MagickOffsetType filepos=0x80;
 879
 880   unsigned int (*ReadBlobXXXLong)(Image *image);
 881   unsigned short (*ReadBlobXXXShort)(Image *image);
 882   void (*ReadBlobDoublesXXX)(Image * image, size_t len, double *data);
 883   void (*ReadBlobFloatsXXX)(Image * image, size_t len, float *data);
 884
 885
 886   assert(image_info != (const ImageInfo *) NULL);
 887   assert(image_info->signature == MagickCoreSignature);
 888   assert(exception != (ExceptionInfo *) NULL);
 889   assert(exception->signature == MagickCoreSignature);
 890   logging = LogMagickEvent(CoderEvent,GetMagickModule(),"enter");
 891
 892   /*
 893      Open image file.
 894    */
 895   image = AcquireImage(image_info,exception);
 896   image2 = (Image *) NULL;
 897
 898   status = OpenBlob(image_info, image, ReadBinaryBlobMode, exception);
 899   if (status == MagickFalse)
 900     {
 901       image=DestroyImageList(image);
 902       return((Image *) NULL);
 903     }
 904   /*
 905      Read MATLAB image.
 906    */
 907   quantum_info=(QuantumInfo *) NULL;
 908   clone_info=(ImageInfo *) NULL;
 909   if (ReadBlob(image,124,(unsigned char *) &MATLAB_HDR.identific) != 124)
 910     ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 911   if (strncmp(MATLAB_HDR.identific,"MATLAB",6) != 0)
 912     {
 913       image=ReadMATImageV4(image_info,image,exception);
 914       if (image == NULL)
 915         {
 916           if ((image != image2) && (image2 != (Image *) NULL))
 917             image2=DestroyImage(image2);
 918           if (clone_info != (ImageInfo *) NULL)
 919             clone_info=DestroyImageInfo(clone_info);
 920           return((Image *) NULL);
 921         }
 922       goto END_OF_READING;
 923     }
 924   MATLAB_HDR.Version = ReadBlobLSBShort(image);
 925   if(ReadBlob(image,2,(unsigned char *) &MATLAB_HDR.EndianIndicator) != 2)
 926     ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 927
 928   if (logging)
 929     (void) LogMagickEvent(CoderEvent,GetMagickModule(),"  Endian %c%c",
 930       MATLAB_HDR.EndianIndicator[0],MATLAB_HDR.EndianIndicator[1]);
 931   if (!strncmp(MATLAB_HDR.EndianIndicator, "IM", 2))
 932   {
 933     ReadBlobXXXLong = ReadBlobLSBLong;
 934     ReadBlobXXXShort = ReadBlobLSBShort;
 935     ReadBlobDoublesXXX = ReadBlobDoublesLSB;
 936     ReadBlobFloatsXXX = ReadBlobFloatsLSB;
 937     image->endian = LSBEndian;
 938   }
 939   else if (!strncmp(MATLAB_HDR.EndianIndicator, "MI", 2))
 940   {
 941     ReadBlobXXXLong = ReadBlobMSBLong;
 942     ReadBlobXXXShort = ReadBlobMSBShort;
 943     ReadBlobDoublesXXX = ReadBlobDoublesMSB;
 944     ReadBlobFloatsXXX = ReadBlobFloatsMSB;
 945     image->endian = MSBEndian;
 946   }
 947   else
 948     {
 949 MATLAB_KO:
 950       if ((image != image2) && (image2 != (Image *) NULL))
 951         image2=DestroyImage(image2);
 952       if (clone_info != (ImageInfo *) NULL)
 953         clone_info=DestroyImageInfo(clone_info);
 954       ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 955     }
 956
 957   filepos = TellBlob(image);
 958   while(!EOFBlob(image)) /* object parser loop */
 959   {
 960     Frames = 1;
 961     if (filepos != (unsigned int) filepos)
 962       break;
 963     if(SeekBlob(image,filepos,SEEK_SET) != filepos) break;
 964     /* printf("pos=%X\n",TellBlob(image)); */
 965
 966     MATLAB_HDR.DataType = ReadBlobXXXLong(image);
 967     if(EOFBlob(image)) break;
 968     MATLAB_HDR.ObjectSize = ReadBlobXXXLong(image);
 969     if(EOFBlob(image)) break;
 970     if((MagickSizeType) (MATLAB_HDR.ObjectSize+filepos) > GetBlobSize(image))
 971       goto MATLAB_KO;
 972     filepos += (MagickOffsetType) MATLAB_HDR.ObjectSize + 4 + 4;
 973
 974     if (clone_info != (ImageInfo *) NULL)
 975       clone_info=DestroyImageInfo(clone_info);
 976     clone_info=CloneImageInfo(image_info);
 977     if ((image != image2) && (image2 != (Image *) NULL))
 978       image2=DestroyImage(image2);
 979     image2 = image;
 980 #if defined(MAGICKCORE_ZLIB_DELEGATE)
 981     if(MATLAB_HDR.DataType == miCOMPRESSED)
 982     {
 983       image2 = decompress_block(image,&MATLAB_HDR.ObjectSize,clone_info,exception);
 984       if(image2==NULL) continue;
 985       MATLAB_HDR.DataType = ReadBlobXXXLong(image2); /* replace compressed object type. */
 986     }
 987 #endif
 988
 989     if (MATLAB_HDR.DataType != miMATRIX)
 990       {
 991         clone_info=DestroyImageInfo(clone_info);
 992 #if defined(MAGICKCORE_ZLIB_DELEGATE)
 993         if (image2 != image)
 994           DeleteImageFromList(&image2);
 995 #endif
 996         continue;  /* skip another objects. */
 997       }
 998
 999     MATLAB_HDR.unknown1 = ReadBlobXXXLong(image2);
1000     MATLAB_HDR.unknown2 = ReadBlobXXXLong(image2);
1001
1002     MATLAB_HDR.unknown5 = ReadBlobXXXLong(image2);
1003     MATLAB_HDR.StructureClass = MATLAB_HDR.unknown5 & 0xFF;
1004     MATLAB_HDR.StructureFlag = (MATLAB_HDR.unknown5>>8) & 0xFF;
1005
1006     MATLAB_HDR.unknown3 = ReadBlobXXXLong(image2);
1007     if(image!=image2)
1008       MATLAB_HDR.unknown4 = ReadBlobXXXLong(image2);  /* ??? don't understand why ?? */
1009     MATLAB_HDR.unknown4 = ReadBlobXXXLong(image2);
1010     MATLAB_HDR.DimFlag = ReadBlobXXXLong(image2);
1011     MATLAB_HDR.SizeX = ReadBlobXXXLong(image2);
1012     MATLAB_HDR.SizeY = ReadBlobXXXLong(image2);
1013
1014
1015     switch(MATLAB_HDR.DimFlag)
1016     {
1017       case  8: z2=z=1; break;      /* 2D matrix*/
1018       case 12: z2=z = ReadBlobXXXLong(image2);  /* 3D matrix RGB*/
1019            (void) ReadBlobXXXLong(image2);
1020          if(z!=3)
1021            {
1022              if (clone_info != (ImageInfo *) NULL)
1023                clone_info=DestroyImageInfo(clone_info);
1024              if ((image != image2) && (image2 != (Image *) NULL))
1025                image2=DestroyImage(image2);
1026              ThrowReaderException(CoderError,
1027                "MultidimensionalMatricesAreNotSupported");
1028            }
1029          break;
1030       case 16: z2=z = ReadBlobXXXLong(image2);  /* 4D matrix animation */
1031          if(z!=3 && z!=1)
1032            {
1033              if (clone_info != (ImageInfo *) NULL)
1034                clone_info=DestroyImageInfo(clone_info);
1035              if ((image != image2) && (image2 != (Image *) NULL))
1036                image2=DestroyImage(image2);
1037              ThrowReaderException(CoderError,
1038                "MultidimensionalMatricesAreNotSupported");
1039            }
1040           Frames = ReadBlobXXXLong(image2);
1041           if (Frames == 0)
1042             {
1043               if (clone_info != (ImageInfo *) NULL)
1044                 clone_info=DestroyImageInfo(clone_info);
1045               if ((image != image2) && (image2 != (Image *) NULL))
1046                 image2=DestroyImage(image2);
1047               ThrowReaderException(CorruptImageError,"ImproperImageHeader");
1048             }
1049           if (AcquireMagickResource(ListLengthResource,Frames) == MagickFalse)
1050             {
1051               if (clone_info != (ImageInfo *) NULL)
1052                 clone_info=DestroyImageInfo(clone_info);
1053               if ((image != image2) && (image2 != (Image *) NULL))
1054                 image2=DestroyImage(image2);
1055               ThrowReaderException(ResourceLimitError,"ListLengthExceedsLimit");
1056             }
1057          break;
1058       default:
1059         if (clone_info != (ImageInfo *) NULL)
1060           clone_info=DestroyImageInfo(clone_info);
1061         if ((image != image2) && (image2 != (Image *) NULL))
1062           image2=DestroyImage(image2);
1063         ThrowReaderException(CoderError, "MultidimensionalMatricesAreNotSupported");
1064     }
1065
1066     MATLAB_HDR.Flag1 = ReadBlobXXXShort(image2);
1067     MATLAB_HDR.NameFlag = ReadBlobXXXShort(image2);
1068
1069     if (logging) (void)LogMagickEvent(CoderEvent,GetMagickModule(),
1070           "MATLAB_HDR.StructureClass %d",MATLAB_HDR.StructureClass);
1071     if (MATLAB_HDR.StructureClass != mxCHAR_CLASS &&
1072         MATLAB_HDR.StructureClass != mxSINGLE_CLASS &&    /* float + complex float */
1073         MATLAB_HDR.StructureClass != mxDOUBLE_CLASS &&    /* double + complex double */
1074         MATLAB_HDR.StructureClass != mxINT8_CLASS &&
1075         MATLAB_HDR.StructureClass != mxUINT8_CLASS &&    /* uint8 + uint8 3D */
1076         MATLAB_HDR.StructureClass != mxINT16_CLASS &&
1077         MATLAB_HDR.StructureClass != mxUINT16_CLASS &&    /* uint16 + uint16 3D */
1078         MATLAB_HDR.StructureClass != mxINT32_CLASS &&
1079         MATLAB_HDR.StructureClass != mxUINT32_CLASS &&    /* uint32 + uint32 3D */
1080         MATLAB_HDR.StructureClass != mxINT64_CLASS &&
1081         MATLAB_HDR.StructureClass != mxUINT64_CLASS)    /* uint64 + uint64 3D */
1082       {
1083         if (image2 != (Image*) NULL)
1084           {
1085             CloseBlob(image2);
1086             DeleteImageFromList(&image2);
1087           }
1088         if (clone_info != (ImageInfo *) NULL)
1089           clone_info=DestroyImageInfo(clone_info);
1090         ThrowReaderException(CoderError,"UnsupportedCellTypeInTheMatrix");
1091       }
1092
1093     switch (MATLAB_HDR.NameFlag)
1094     {
1095       case 0:
1096         size = ReadBlobXXXLong(image2);  /* Object name string size */
1097         size = 4 * (((size_t) size + 3 + 1) / 4);
1098         (void) SeekBlob(image2, size, SEEK_CUR);
1099         break;
1100       case 1:
1101       case 2:
1102       case 3:
1103       case 4:
1104         (void) ReadBlob(image2, 4, (unsigned char *) &size); /* Object name string */
1105         break;
1106       default:
1107         goto MATLAB_KO;
1108     }
1109
1110     CellType = ReadBlobXXXLong(image2);    /* Additional object type */
1111     if (logging)
1112       (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1113         "MATLAB_HDR.CellType: %.20g",(double) CellType);
1114
1115     (void) ReadBlob(image2, 4, (unsigned char *) &size);     /* data size */
1116
1117     NEXT_FRAME:
1118     switch (CellType)
1119     {
1120       case miINT8:
1121       case miUINT8:
1122         sample_size = 8;
1123         if(MATLAB_HDR.StructureFlag & FLAG_LOGICAL)
1124           image->depth = 1;
1125         else
1126           image->depth = 8;         /* Byte type cell */
1127         ldblk = (ssize_t) MATLAB_HDR.SizeX;
1128         break;
1129       case miINT16:
1130       case miUINT16:
1131         sample_size = 16;
1132         image->depth = 16;        /* Word type cell */
1133         ldblk = (ssize_t) (2 * MATLAB_HDR.SizeX);
1134         break;
1135       case miINT32:
1136       case miUINT32:
1137         sample_size = 32;
1138         image->depth = 32;        /* Dword type cell */
1139         ldblk = (ssize_t) (4 * MATLAB_HDR.SizeX);
1140         break;
1141       case miINT64:
1142       case miUINT64:
1143         sample_size = 64;
1144         image->depth = 64;        /* Qword type cell */
1145         ldblk = (ssize_t) (8 * MATLAB_HDR.SizeX);
1146         break;
1147       case miSINGLE:
1148         sample_size = 32;
1149         image->depth = 32;        /* double type cell */
1150         (void) SetImageOption(clone_info,"quantum:format","floating-point");
1151         if (MATLAB_HDR.StructureFlag & FLAG_COMPLEX)
1152           {              /* complex float type cell */
1153           }
1154         ldblk = (ssize_t) (4 * MATLAB_HDR.SizeX);
1155         break;
1156       case miDOUBLE:
1157         sample_size = 64;
1158         image->depth = 64;        /* double type cell */
1159         (void) SetImageOption(clone_info,"quantum:format","floating-point");
1160 DisableMSCWarning(4127)
1161         if (sizeof(double) != 8)
1162 RestoreMSCWarning
1163           {
1164             if (clone_info != (ImageInfo *) NULL)
1165               clone_info=DestroyImageInfo(clone_info);
1166             if ((image != image2) && (image2 != (Image *) NULL))
1167               image2=DestroyImage(image2);
1168             ThrowReaderException(CoderError, "IncompatibleSizeOfDouble");
1169           }
1170         if (MATLAB_HDR.StructureFlag & FLAG_COMPLEX)
1171           {                         /* complex double type cell */
1172           }
1173         ldblk = (ssize_t) (8 * MATLAB_HDR.SizeX);
1174         break;
1175       default:
1176         if ((image != image2) && (image2 != (Image *) NULL))
1177           image2=DestroyImage(image2);
1178         if (clone_info)
1179           clone_info=DestroyImageInfo(clone_info);
1180         ThrowReaderException(CoderError, "UnsupportedCellTypeInTheMatrix");
1181     }
1182     (void) sample_size;
1183     image->columns = MATLAB_HDR.SizeX;
1184     image->rows = MATLAB_HDR.SizeY;
1185     image->colors = GetQuantumRange(image->depth);
1186     if (image->columns == 0 || image->rows == 0)
1187       goto MATLAB_KO;
1188     if((unsigned int)ldblk*MATLAB_HDR.SizeY > MATLAB_HDR.ObjectSize)
1189       goto MATLAB_KO;
1190     /* Image is gray when no complex flag is set and 2D Matrix */
1191     if ((MATLAB_HDR.DimFlag == 8) &&
1192         ((MATLAB_HDR.StructureFlag & FLAG_COMPLEX) == 0))
1193       {
1194         image->type=GrayscaleType;
1195         SetImageColorspace(image,GRAYColorspace,exception);
1196       }
1197
1198
1199     /*
1200       If ping is true, then only set image size and colors without
1201       reading any image data.
1202     */
1203     if (image_info->ping)
1204     {
1205       size_t temp = image->columns;
1206       image->columns = image->rows;
1207       image->rows = temp;
1208       goto done_reading; /* !!!!!! BAD  !!!! */
1209     }
1210     status=SetImageExtent(image,image->columns,image->rows,exception);
1211     if (status == MagickFalse)
1212       {
1213         if (clone_info != (ImageInfo *) NULL)
1214           clone_info=DestroyImageInfo(clone_info);
1215         if ((image != image2) && (image2 != (Image *) NULL))
1216           image2=DestroyImage(image2);
1217         return(DestroyImageList(image));
1218       }
1219     (void) SetImageBackgroundColor(image,exception);
1220     quantum_info=AcquireQuantumInfo(clone_info,image);
1221     if (quantum_info == (QuantumInfo *) NULL)
1222       {
1223         if (clone_info != (ImageInfo *) NULL)
1224           clone_info=DestroyImageInfo(clone_info);
1225         if ((image != image2) && (image2 != (Image *) NULL))
1226           image2=DestroyImage(image2);
1227         ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
1228       }
1229
1230   /* ----- Load raster data ----- */
1231     BImgBuff = (unsigned char *) AcquireQuantumMemory((size_t) (ldblk),sizeof(double));    /* Ldblk was set in the check phase */
1232     if (BImgBuff == NULL)
1233       {
1234         if (clone_info != (ImageInfo *) NULL)
1235           clone_info=DestroyImageInfo(clone_info);
1236         if ((image != image2) && (image2 != (Image *) NULL))
1237           image2=DestroyImage(image2);
1238         if (quantum_info != (QuantumInfo *) NULL)
1239           quantum_info=DestroyQuantumInfo(quantum_info);
1240         ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
1241       }
1242     (void) memset(BImgBuff,0,ldblk*sizeof(double));
1243
1244     MinVal = 0;
1245     MaxVal = 0;
1246     if (CellType==miDOUBLE || CellType==miSINGLE)        /* Find Min and Max Values for floats */
1247       {
1248         CalcMinMax(image2,image_info->endian,MATLAB_HDR.SizeX,MATLAB_HDR.SizeY,
1249           CellType,ldblk,BImgBuff,&quantum_info->minimum,
1250           &quantum_info->maximum);
1251       }
1252
1253     /* Main loop for reading all scanlines */
1254     if(z==1) z=0; /* read grey scanlines */
1255     /* else read color scanlines */
1256     do
1257     {
1258       for (i = 0; i < (ssize_t) MATLAB_HDR.SizeY; i++)
1259       {
1260         q=GetAuthenticPixels(image,0,MATLAB_HDR.SizeY-i-1,image->columns,1,exception);
1261         if (q == (Quantum *) NULL)
1262           {
1263             if (logging) (void)LogMagickEvent(CoderEvent,GetMagickModule(),
1264               "  MAT set image pixels returns unexpected NULL on a row %u.", (unsigned)(MATLAB_HDR.SizeY-i-1));
1265             goto done_reading;    /* Skip image rotation, when cannot set image pixels    */
1266           }
1267         if(ReadBlob(image2,ldblk,(unsigned char *)BImgBuff) != (ssize_t) ldblk)
1268           {
1269             if (logging) (void)LogMagickEvent(CoderEvent,GetMagickModule(),
1270               "  MAT cannot read scanrow %u from a file.", (unsigned)(MATLAB_HDR.SizeY-i-1));
1271             goto ExitLoop;
1272           }
1273         if((CellType==miINT8 || CellType==miUINT8) && (MATLAB_HDR.StructureFlag & FLAG_LOGICAL))
1274         {
1275           FixLogical((unsigned char *)BImgBuff,ldblk);
1276           if(ImportQuantumPixels(image,(CacheView *) NULL,quantum_info,z2qtype[z],BImgBuff,exception) <= 0)
1277             {
1278 ImportQuantumPixelsFailed:
1279               if (logging) (void)LogMagickEvent(CoderEvent,GetMagickModule(),
1280                 "  MAT failed to ImportQuantumPixels for a row %u", (unsigned)(MATLAB_HDR.SizeY-i-1));
1281               break;
1282             }
1283         }
1284         else
1285         {
1286           if(ImportQuantumPixels(image,(CacheView *) NULL,quantum_info,z2qtype[z],BImgBuff,exception) <= 0)
1287             goto ImportQuantumPixelsFailed;
1288
1289
1290           if (z<=1 &&       /* fix only during a last pass z==0 || z==1 */
1291              (CellType==miINT8 || CellType==miINT16 || CellType==miINT32 || CellType==miINT64))
1292             FixSignedValues(image,q,MATLAB_HDR.SizeX);
1293         }
1294
1295         if (!SyncAuthenticPixels(image,exception))
1296           {
1297             if (logging) (void)LogMagickEvent(CoderEvent,GetMagickModule(),
1298               "  MAT failed to sync image pixels for a row %u", (unsigned)(MATLAB_HDR.SizeY-i-1));
1299             goto ExitLoop;
1300           }
1301       }
1302     } while(z-- >= 2);
1303 ExitLoop:
1304
1305
1306     /* Read complex part of numbers here */
1307     if (MATLAB_HDR.StructureFlag & FLAG_COMPLEX)
1308     {        /* Find Min and Max Values for complex parts of floats */
1309       CellType = ReadBlobXXXLong(image2);    /* Additional object type */
1310       i = ReadBlobXXXLong(image2);           /* size of a complex part - toss away*/
1311
1312       if (CellType==miDOUBLE || CellType==miSINGLE)
1313       {
1314         CalcMinMax(image2,  image_info->endian, MATLAB_HDR.SizeX, MATLAB_HDR.SizeY, CellType, ldblk, BImgBuff, &MinVal, &MaxVal);
1315       }
1316
1317       if (CellType==miDOUBLE)
1318         for (i = 0; i < (ssize_t) MATLAB_HDR.SizeY; i++)
1319         {
1320           ReadBlobDoublesXXX(image2, ldblk, (double *)BImgBuff);
1321           InsertComplexDoubleRow(image, (double *)BImgBuff, i, MinVal, MaxVal,
1322             exception);
1323         }
1324
1325       if (CellType==miSINGLE)
1326         for (i = 0; i < (ssize_t) MATLAB_HDR.SizeY; i++)
1327         {
1328           ReadBlobFloatsXXX(image2, ldblk, (float *)BImgBuff);
1329           InsertComplexFloatRow(image,(float *)BImgBuff,i,MinVal,MaxVal,
1330             exception);
1331         }
1332     }
1333
1334       /* Image is gray when no complex flag is set and 2D Matrix AGAIN!!! */
1335     if ((MATLAB_HDR.DimFlag == 8) &&
1336         ((MATLAB_HDR.StructureFlag & FLAG_COMPLEX) == 0))
1337       image->type=GrayscaleType;
1338     if (image->depth == 1)
1339       image->type=BilevelType;
1340
1341     if(image2==image)
1342         image2 = NULL;    /* Remove shadow copy to an image before rotation. */
1343
1344       /*  Rotate image. */
1345     rotated_image = RotateImage(image, 90.0, exception);
1346     if (rotated_image != (Image *) NULL)
1347     {
1348         /* Remove page offsets added by RotateImage */
1349       rotated_image->page.x=0;
1350       rotated_image->page.y=0;
1351       rotated_image->colors = image->colors;
1352       DestroyBlob(rotated_image);
1353       rotated_image->blob=ReferenceBlob(image->blob);
1354       AppendImageToList(&image,rotated_image);
1355       DeleteImageFromList(&image);
1356     }
1357
1358 done_reading:
1359
1360     if(image2!=NULL)
1361       if(image2!=image)
1362       {
1363         DeleteImageFromList(&image2);
1364         if(clone_info)
1365         {
1366           if(clone_info->file)
1367           {
1368             fclose(clone_info->file);
1369             clone_info->file = NULL;
1370             (void) remove_utf8(clone_info->filename);
1371           }
1372         }
1373       }
1374     if (EOFBlob(image) != MagickFalse)
1375       break;
1376
1377       /* Allocate next image structure. */
1378     AcquireNextImage(image_info,image,exception);
1379     if (image->next == (Image *) NULL) break;
1380     image=SyncNextImageInList(image);
1381     image->columns=image->rows=0;
1382     image->colors=0;
1383
1384       /* row scan buffer is no longer needed */
1385     RelinquishMagickMemory(BImgBuff);
1386     BImgBuff = NULL;
1387     if (quantum_info != (QuantumInfo *) NULL)
1388       quantum_info=DestroyQuantumInfo(quantum_info);
1389
1390     if(--Frames>0)
1391     {
1392       z = z2;
1393       if(image2==NULL) image2 = image;
1394       if(!EOFBlob(image) && TellBlob(image)<filepos)
1395         goto NEXT_FRAME;
1396     }
1397     if ((image2!=NULL) && (image2!=image))   /* Does shadow temporary decompressed image exist? */
1398       {
1399 /*  CloseBlob(image2); */
1400         DeleteImageFromList(&image2);
1401         if(clone_info)
1402         {
1403           if(clone_info->file)
1404           {
1405             fclose(clone_info->file);
1406             clone_info->file = NULL;
1407             (void) remove_utf8(clone_info->filename);
1408           }
1409         }
1410       }
1411
1412     if (clone_info)
1413       clone_info=DestroyImageInfo(clone_info);
1414   }
1415
1416   RelinquishMagickMemory(BImgBuff);
1417   if (quantum_info != (QuantumInfo *) NULL)
1418     quantum_info=DestroyQuantumInfo(quantum_info);
1419 END_OF_READING:
1420   CloseBlob(image);
1421
1422
1423   {
1424     Image *p;
1425     ssize_t scene=0;
1426
1427     /*
1428       Rewind list, removing any empty images while rewinding.
1429     */
1430     p=image;
1431     image=NULL;
1432     while (p != (Image *) NULL)
1433       {
1434         Image *tmp=p;
1435         if ((p->rows == 0) || (p->columns == 0)) {
1436           p=p->previous;
1437           if (tmp == image2)
1438             image2=(Image *) NULL;
1439           DeleteImageFromList(&tmp);
1440         } else {
1441           image=p;
1442           p=p->previous;
1443         }
1444       }
1445
1446     /*
1447       Fix scene numbers
1448     */
1449     for (p=image; p != (Image *) NULL; p=p->next)
1450       p->scene=scene++;
1451   }
1452
1453   if(clone_info != NULL)  /* cleanup garbage file from compression */
1454   {
1455     if(clone_info->file)
1456     {
1457       fclose(clone_info->file);
1458       clone_info->file = NULL;
1459       (void) remove_utf8(clone_info->filename);
1460     }
1461     DestroyImageInfo(clone_info);
1462     clone_info = NULL;
1463   }
1464   if (logging) (void)LogMagickEvent(CoderEvent,GetMagickModule(),"return");
1465   if ((image != image2) && (image2 != (Image *) NULL))
1466     image2=DestroyImage(image2);
1467   if (image == (Image *) NULL)
1468     ThrowReaderException(CorruptImageError,"ImproperImageHeader")
1469   return(image);
1470 }
1471 \f
1472 /*
1473 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1474 %                                                                             %
1475 %                                                                             %
1476 %                                                                             %
1477 %   R e g i s t e r M A T I m a g e                                           %
1478 %                                                                             %
1479 %                                                                             %
1480 %                                                                             %
1481 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1482 %
1483 %  Method RegisterMATImage adds attributes for the MAT image format to
1484 %  the list of supported formats.  The attributes include the image format
1485 %  tag, a method to read and/or write the format, whether the format
1486 %  supports the saving of more than one frame to the same file or blob,
1487 %  whether the format supports native in-memory I/O, and a brief
1488 %  description of the format.
1489 %
1490 %  The format of the RegisterMATImage method is:
1491 %
1492 %      size_t RegisterMATImage(void)
1493 %
1494 */
1495 ModuleExport size_t RegisterMATImage(void)
1496 {
1497   MagickInfo
1498     *entry;
1499
1500   entry=AcquireMagickInfo("MAT","MAT","MATLAB level 5 image format");
1501   entry->decoder=(DecodeImageHandler *) ReadMATImage;
1502   entry->encoder=(EncodeImageHandler *) WriteMATImage;
1503   entry->flags^=CoderBlobSupportFlag;
1504   entry->flags|=CoderDecoderSeekableStreamFlag;
1505   (void) RegisterMagickInfo(entry);
1506   return(MagickImageCoderSignature);
1507 }
1508 \f
1509 /*
1510 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1511 %                                                                             %
1512 %                                                                             %
1513 %                                                                             %
1514 %   U n r e g i s t e r M A T I m a g e                                       %
1515 %                                                                             %
1516 %                                                                             %
1517 %                                                                             %
1518 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1519 %
1520 %  Method UnregisterMATImage removes format registrations made by the
1521 %  MAT module from the list of supported formats.
1522 %
1523 %  The format of the UnregisterMATImage method is:
1524 %
1525 %      UnregisterMATImage(void)
1526 %
1527 */
1528 ModuleExport void UnregisterMATImage(void)
1529 {
1530   (void) UnregisterMagickInfo("MAT");
1531 }
1532 \f
1533 /*
1534 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1535 %                                                                             %
1536 %                                                                             %
1537 %                                                                             %
1538 %   W r i t e M A T L A B I m a g e                                           %
1539 %                                                                             %
1540 %                                                                             %
1541 %                                                                             %
1542 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1543 %
1544 %  Function WriteMATImage writes an Matlab matrix to a file.
1545 %
1546 %  The format of the WriteMATImage method is:
1547 %
1548 %      MagickBooleanType WriteMATImage(const ImageInfo *image_info,
1549 %        Image *image,ExceptionInfo *exception)
1550 %
1551 %  A description of each parameter follows.
1552 %
1553 %    o image_info: Specifies a pointer to a ImageInfo structure.
1554 %
1555 %    o image:  A pointer to an Image structure.
1556 %
1557 %    o exception: return any errors or warnings in this structure.
1558 %
1559 */
1560 static MagickBooleanType WriteMATImage(const ImageInfo *image_info,Image *image,
1561   ExceptionInfo *exception)
1562 {
1563   char
1564     MATLAB_HDR[0x80];
1565
1566   MagickBooleanType
1567     status;
1568
1569   MagickOffsetType
1570     scene;
1571
1572   size_t
1573     imageListLength;
1574
1575   struct tm
1576     local_time;
1577
1578   time_t
1579     current_time;
1580
1581   /*
1582     Open output image file.
1583   */
1584   assert(image_info != (const ImageInfo *) NULL);
1585   assert(image_info->signature == MagickCoreSignature);
1586   assert(image != (Image *) NULL);
1587   assert(image->signature == MagickCoreSignature);
1588   (void) LogMagickEvent(CoderEvent,GetMagickModule(),"enter MAT");
1589   assert(exception != (ExceptionInfo *) NULL);
1590   assert(exception->signature == MagickCoreSignature);
1591   status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
1592   if (status == MagickFalse)
1593     return(MagickFalse);
1594   image->depth=8;
1595
1596   current_time=time((time_t *) NULL);
1597 #if defined(MAGICKCORE_HAVE_LOCALTIME_R)
1598   (void) localtime_r(&current_time,&local_time);
1599 #else
1600   (void) memcpy(&local_time,localtime(&current_time),sizeof(local_time));
1601 #endif
1602   (void) memset(MATLAB_HDR,' ',MagickMin(sizeof(MATLAB_HDR),124));
1603   FormatLocaleString(MATLAB_HDR,sizeof(MATLAB_HDR),
1604     "MATLAB 5.0 MAT-file, Platform: %s, Created on: %s %s %2d %2d:%2d:%2d %d",
1605     OsDesc,DayOfWTab[local_time.tm_wday],MonthsTab[local_time.tm_mon],
1606     local_time.tm_mday,local_time.tm_hour,local_time.tm_min,
1607     local_time.tm_sec,local_time.tm_year+1900);
1608   MATLAB_HDR[0x7C]=0;
1609   MATLAB_HDR[0x7D]=1;
1610   MATLAB_HDR[0x7E]='I';
1611   MATLAB_HDR[0x7F]='M';
1612   (void) WriteBlob(image,sizeof(MATLAB_HDR),(unsigned char *) MATLAB_HDR);
1613   scene=0;
1614   imageListLength=GetImageListLength(image);
1615   do
1616   {
1617     char
1618       padding;
1619
1620     MagickBooleanType
1621       is_gray;
1622
1623     QuantumInfo
1624       *quantum_info;
1625
1626     size_t
1627       data_size;
1628
1629     unsigned char
1630       *pixels;
1631
1632     unsigned int
1633       z;
1634
1635     (void) TransformImageColorspace(image,sRGBColorspace,exception);
1636     is_gray=SetImageGray(image,exception);
1637     z=(is_gray != MagickFalse) ? 0 : 3;
1638
1639     /*
1640       Store MAT header.
1641     */
1642     data_size = image->rows * image->columns;
1643     if (is_gray == MagickFalse)
1644       data_size*=3;
1645     padding=((unsigned char)(data_size-1) & 0x7) ^ 0x7;
1646
1647     (void) WriteBlobLSBLong(image,miMATRIX);
1648     (void) WriteBlobLSBLong(image,(unsigned int) data_size+padding+
1649       ((is_gray != MagickFalse) ? 48 : 56));
1650     (void) WriteBlobLSBLong(image,0x6); /* 0x88 */
1651     (void) WriteBlobLSBLong(image,0x8); /* 0x8C */
1652     (void) WriteBlobLSBLong(image,0x6); /* 0x90 */
1653     (void) WriteBlobLSBLong(image,0);
1654     (void) WriteBlobLSBLong(image,0x5); /* 0x98 */
1655     (void) WriteBlobLSBLong(image,(is_gray != MagickFalse) ? 0x8 : 0xC); /* 0x9C - DimFlag */
1656     (void) WriteBlobLSBLong(image,(unsigned int) image->rows);    /* x: 0xA0 */
1657     (void) WriteBlobLSBLong(image,(unsigned int) image->columns); /* y: 0xA4 */
1658     if (is_gray == MagickFalse)
1659       {
1660         (void) WriteBlobLSBLong(image,3); /* z: 0xA8 */
1661         (void) WriteBlobLSBLong(image,0);
1662       }
1663     (void) WriteBlobLSBShort(image,1);  /* 0xB0 */
1664     (void) WriteBlobLSBShort(image,1);  /* 0xB2 */
1665     (void) WriteBlobLSBLong(image,'M'); /* 0xB4 */
1666     (void) WriteBlobLSBLong(image,0x2); /* 0xB8 */
1667     (void) WriteBlobLSBLong(image,(unsigned int) data_size); /* 0xBC */
1668
1669     /*
1670       Store image data.
1671     */
1672     quantum_info=AcquireQuantumInfo(image_info,image);
1673     if (quantum_info == (QuantumInfo *) NULL)
1674       ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
1675     pixels=(unsigned char *) GetQuantumPixels(quantum_info);
1676     do
1677     {
1678       const Quantum
1679         *p;
1680
1681       ssize_t
1682         y;
1683
1684       for (y=0; y < (ssize_t)image->columns; y++)
1685       {
1686         p=GetVirtualPixels(image,y,0,1,image->rows,exception);
1687         if (p == (const Quantum *) NULL)
1688           break;
1689         (void) ExportQuantumPixels(image,(CacheView *) NULL,quantum_info,
1690           z2qtype[z],pixels,exception);
1691         (void) WriteBlob(image,image->rows,pixels);
1692       }
1693       if (SyncAuthenticPixels(image,exception) == MagickFalse)
1694         break;
1695     } while (z-- >= 2);
1696     while (padding-- > 0)
1697       (void) WriteBlobByte(image,0);
1698     quantum_info=DestroyQuantumInfo(quantum_info);
1699     if (GetNextImageInList(image) == (Image *) NULL)
1700       break;
1701     image=SyncNextImageInList(image);
1702     status=SetImageProgress(image,SaveImagesTag,scene++,imageListLength);
1703     if (status == MagickFalse)
1704       break;
1705   } while (image_info->adjoin != MagickFalse);
1706   (void) CloseBlob(image);
1707   return(status);
1708 }