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 long DataType;
 102   unsigned int ObjectSize;
 103   unsigned long unknown1;
 104   unsigned long unknown2;
 105
 106   unsigned short unknown5;
 107   unsigned char StructureFlag;
 108   unsigned char StructureClass;
 109   unsigned long unknown3;
 110   unsigned long unknown4;
 111   unsigned long DimFlag;
 112
 113   unsigned long SizeX;
 114   unsigned long 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((Image *) NULL);
 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(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 ? (Image *) NULL : image);
 700         goto skip_reading_current;
 701       }
 702     status=SetImageExtent(image,image->columns,image->rows,exception);
 703     if (status == MagickFalse)
 704       return((Image *) NULL);
 705     (void) SetImageBackgroundColor(image,exception);
 706     (void) SetImageColorspace(image,GRAYColorspace,exception);
 707     quantum_info=AcquireQuantumInfo(image_info,image);
 708     if (quantum_info == (QuantumInfo *) NULL)
 709       return((Image *) NULL);
 710     switch(HDR.Type[1])
 711     {
 712       case 0:
 713         format_type=FloatingPointQuantumFormat;
 714         depth=64;
 715         break;
 716       case 1:
 717         format_type=FloatingPointQuantumFormat;
 718         depth=32;
 719         break;
 720       case 2:
 721         format_type=UnsignedQuantumFormat;
 722         depth=16;
 723         break;
 724       case 3:
 725         format_type=SignedQuantumFormat;
 726         depth=16;
 727         break;
 728       case 4:
 729         format_type=UnsignedQuantumFormat;
 730         depth=8;
 731         break;
 732       default:
 733         format_type=UnsignedQuantumFormat;
 734         depth=8;
 735         break;
 736     }
 737     image->depth=depth;
 738     if (HDR.Type[0] != 0)
 739       SetQuantumEndian(image,quantum_info,MSBEndian);
 740     status=SetQuantumFormat(image,quantum_info,format_type);
 741     status=SetQuantumDepth(image,quantum_info,depth);
 742     status=SetQuantumEndian(image,quantum_info,endian);
 743     SetQuantumScale(quantum_info,1.0);
 744     pixels=(unsigned char *) GetQuantumPixels(quantum_info);
 745     for (y=0; y < (ssize_t) image->rows; y++)
 746     {
 747       register Quantum
 748         *magick_restrict q;
 749
 750       count=ReadBlob(image,depth/8*image->columns,(char *) pixels);
 751       if (count == -1)
 752         break;
 753       q=QueueAuthenticPixels(image,0,image->rows-y-1,image->columns,1,
 754         exception);
 755       if (q == (Quantum *) NULL)
 756         break;
 757       (void) ImportQuantumPixels(image,(CacheView *) NULL,quantum_info,
 758         GrayQuantum,pixels,exception);
 759       if ((HDR.Type[1] == 2) || (HDR.Type[1] == 3))
 760         FixSignedValues(image,q,(int) image->columns);
 761       if (SyncAuthenticPixels(image,exception) == MagickFalse)
 762         break;
 763       if (image->previous == (Image *) NULL)
 764         {
 765           status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
 766             image->rows);
 767           if (status == MagickFalse)
 768             break;
 769         }
 770     }
 771     if (HDR.imagf == 1)
 772       for (y=0; y < (ssize_t) image->rows; y++)
 773       {
 774         /*
 775           Read complex pixels.
 776         */
 777         count=ReadBlob(image,depth/8*image->columns,(char *) pixels);
 778         if (count == -1)
 779           break;
 780         if (HDR.Type[1] == 0)
 781           InsertComplexDoubleRow(image,(double *) pixels,y,0,0,exception);
 782         else
 783           InsertComplexFloatRow(image,(float *) pixels,y,0,0,exception);
 784       }
 785     if (quantum_info != (QuantumInfo *) NULL)
 786       quantum_info=DestroyQuantumInfo(quantum_info);
 787     if (EOFBlob(image) != MagickFalse)
 788       {
 789         ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
 790           image->filename);
 791         break;
 792       }
 793     rotated_image=RotateImage(image,90.0,exception);
 794     if (rotated_image != (Image *) NULL)
 795       {
 796         rotated_image->page.x=0;
 797         rotated_image->page.y=0;
 798         rotated_image->colors = image->colors;
 799         DestroyBlob(rotated_image);
 800         rotated_image->blob=ReferenceBlob(image->blob);
 801         AppendImageToList(&image,rotated_image);
 802         DeleteImageFromList(&image);
 803       }
 804     /*
 805       Proceed to next image.
 806     */
 807     if (image_info->number_scenes != 0)
 808       if (image->scene >= (image_info->scene+image_info->number_scenes-1))
 809         break;
 810     /*
 811       Allocate next image structure.
 812     */
 813 skip_reading_current:
 814     AcquireNextImage(image_info,image,exception);
 815     if (GetNextImageInList(image) == (Image *) NULL)
 816       {
 817         image=DestroyImageList(image);
 818         return((Image *) NULL);
 819       }
 820     image=SyncNextImageInList(image);
 821     status=SetImageProgress(image,LoadImagesTag,TellBlob(image),
 822       GetBlobSize(image));
 823     if (status == MagickFalse)
 824       break;
 825   }
 826   (void) CloseBlob(image);
 827   return(GetFirstImageInList(image));
 828 }
 829 \f
 830 /*
 831 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 832 %                                                                             %
 833 %                                                                             %
 834 %                                                                             %
 835 %   R e a d M A T L A B i m a g e                                             %
 836 %                                                                             %
 837 %                                                                             %
 838 %                                                                             %
 839 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 840 %
 841 %  ReadMATImage() reads an MAT X image file and returns it.  It
 842 %  allocates the memory necessary for the new Image structure and returns a
 843 %  pointer to the new image.
 844 %
 845 %  The format of the ReadMATImage method is:
 846 %
 847 %      Image *ReadMATImage(const ImageInfo *image_info,ExceptionInfo *exception)
 848 %
 849 %  A description of each parameter follows:
 850 %
 851 %    o image:  Method ReadMATImage returns a pointer to the image after
 852 %      reading. A null image is returned if there is a memory shortage or if
 853 %      the image cannot be read.
 854 %
 855 %    o image_info: Specifies a pointer to a ImageInfo structure.
 856 %
 857 %    o exception: return any errors or warnings in this structure.
 858 %
 859 */
 860 static Image *ReadMATImage(const ImageInfo *image_info,ExceptionInfo *exception)
 861 {
 862   Image *image, *image2=NULL,
 863    *rotated_image;
 864   register Quantum *q;
 865
 866   unsigned int status;
 867   MATHeader MATLAB_HDR;
 868   size_t size;
 869   size_t CellType;
 870   QuantumInfo *quantum_info;
 871   ImageInfo *clone_info;
 872   int i;
 873   ssize_t ldblk;
 874   unsigned char *BImgBuff = NULL;
 875   double MinVal, MaxVal;
 876   unsigned z, z2;
 877   unsigned Frames;
 878   int logging;
 879   int sample_size;
 880   MagickOffsetType filepos=0x80;
 881
 882   unsigned int (*ReadBlobXXXLong)(Image *image);
 883   unsigned short (*ReadBlobXXXShort)(Image *image);
 884   void (*ReadBlobDoublesXXX)(Image * image, size_t len, double *data);
 885   void (*ReadBlobFloatsXXX)(Image * image, size_t len, float *data);
 886
 887
 888   assert(image_info != (const ImageInfo *) NULL);
 889   assert(image_info->signature == MagickCoreSignature);
 890   assert(exception != (ExceptionInfo *) NULL);
 891   assert(exception->signature == MagickCoreSignature);
 892   logging = LogMagickEvent(CoderEvent,GetMagickModule(),"enter");
 893
 894   /*
 895      Open image file.
 896    */
 897   image = AcquireImage(image_info,exception);
 898   image2 = (Image *) NULL;
 899
 900   status = OpenBlob(image_info, image, ReadBinaryBlobMode, exception);
 901   if (status == MagickFalse)
 902     {
 903       image=DestroyImageList(image);
 904       return((Image *) NULL);
 905     }
 906   /*
 907      Read MATLAB image.
 908    */
 909   quantum_info=(QuantumInfo *) NULL;
 910   clone_info=(ImageInfo *) NULL;
 911   if (ReadBlob(image,124,(unsigned char *) &MATLAB_HDR.identific) != 124)
 912     ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 913   if (strncmp(MATLAB_HDR.identific,"MATLAB",6) != 0)
 914     {
 915       image2=ReadMATImageV4(image_info,image,exception);
 916       if (image2  == NULL)
 917         goto MATLAB_KO;
 918       image=image2;
 919       goto END_OF_READING;
 920     }
 921   MATLAB_HDR.Version = ReadBlobLSBShort(image);
 922   if(ReadBlob(image,2,(unsigned char *) &MATLAB_HDR.EndianIndicator) != 2)
 923     ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 924
 925   if (logging)
 926     (void) LogMagickEvent(CoderEvent,GetMagickModule(),"  Endian %c%c",
 927       MATLAB_HDR.EndianIndicator[0],MATLAB_HDR.EndianIndicator[1]);
 928   if (!strncmp(MATLAB_HDR.EndianIndicator, "IM", 2))
 929   {
 930     ReadBlobXXXLong = ReadBlobLSBLong;
 931     ReadBlobXXXShort = ReadBlobLSBShort;
 932     ReadBlobDoublesXXX = ReadBlobDoublesLSB;
 933     ReadBlobFloatsXXX = ReadBlobFloatsLSB;
 934     image->endian = LSBEndian;
 935   }
 936   else if (!strncmp(MATLAB_HDR.EndianIndicator, "MI", 2))
 937   {
 938     ReadBlobXXXLong = ReadBlobMSBLong;
 939     ReadBlobXXXShort = ReadBlobMSBShort;
 940     ReadBlobDoublesXXX = ReadBlobDoublesMSB;
 941     ReadBlobFloatsXXX = ReadBlobFloatsMSB;
 942     image->endian = MSBEndian;
 943   }
 944   else
 945     {
 946 MATLAB_KO:
 947       if ((image != image2) && (image2 != (Image *) NULL))
 948         image2=DestroyImage(image2);
 949       if (clone_info != (ImageInfo *) NULL)
 950         clone_info=DestroyImageInfo(clone_info);
 951       ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 952     }
 953
 954   filepos = TellBlob(image);
 955   while(!EOFBlob(image)) /* object parser loop */
 956   {
 957     Frames = 1;
 958     if(SeekBlob(image,filepos,SEEK_SET) != filepos) break;
 959     /* printf("pos=%X\n",TellBlob(image)); */
 960
 961     MATLAB_HDR.DataType = ReadBlobXXXLong(image);
 962     if(EOFBlob(image)) break;
 963     MATLAB_HDR.ObjectSize = ReadBlobXXXLong(image);
 964     if(EOFBlob(image)) break;
 965     if((MagickSizeType) (MATLAB_HDR.ObjectSize+filepos) > GetBlobSize(image))
 966       goto MATLAB_KO;
 967     filepos += MATLAB_HDR.ObjectSize + 4 + 4;
 968
 969     if (clone_info != (ImageInfo *) NULL)
 970       clone_info=DestroyImageInfo(clone_info);
 971     clone_info=CloneImageInfo(image_info);
 972     if ((image != image2) && (image2 != (Image *) NULL))
 973       image2=DestroyImage(image2);
 974     image2 = image;
 975 #if defined(MAGICKCORE_ZLIB_DELEGATE)
 976     if(MATLAB_HDR.DataType == miCOMPRESSED)
 977     {
 978       image2 = decompress_block(image,&MATLAB_HDR.ObjectSize,clone_info,exception);
 979       if(image2==NULL) continue;
 980       MATLAB_HDR.DataType = ReadBlobXXXLong(image2); /* replace compressed object type. */
 981     }
 982 #endif
 983
 984     if (MATLAB_HDR.DataType!=miMATRIX)
 985       {
 986         clone_info=DestroyImageInfo(clone_info);
 987         continue;  /* skip another objects. */
 988       }
 989
 990     MATLAB_HDR.unknown1 = ReadBlobXXXLong(image2);
 991     MATLAB_HDR.unknown2 = ReadBlobXXXLong(image2);
 992
 993     MATLAB_HDR.unknown5 = ReadBlobXXXLong(image2);
 994     MATLAB_HDR.StructureClass = MATLAB_HDR.unknown5 & 0xFF;
 995     MATLAB_HDR.StructureFlag = (MATLAB_HDR.unknown5>>8) & 0xFF;
 996
 997     MATLAB_HDR.unknown3 = ReadBlobXXXLong(image2);
 998     if(image!=image2)
 999       MATLAB_HDR.unknown4 = ReadBlobXXXLong(image2);  /* ??? don't understand why ?? */
1000     MATLAB_HDR.unknown4 = ReadBlobXXXLong(image2);
1001     MATLAB_HDR.DimFlag = ReadBlobXXXLong(image2);
1002     MATLAB_HDR.SizeX = ReadBlobXXXLong(image2);
1003     MATLAB_HDR.SizeY = ReadBlobXXXLong(image2);
1004
1005
1006     switch(MATLAB_HDR.DimFlag)
1007     {
1008       case  8: z2=z=1; break;      /* 2D matrix*/
1009       case 12: z2=z = ReadBlobXXXLong(image2);  /* 3D matrix RGB*/
1010            (void) ReadBlobXXXLong(image2);
1011          if(z!=3)
1012            {
1013              if (clone_info != (ImageInfo *) NULL)
1014                clone_info=DestroyImageInfo(clone_info);
1015              if ((image != image2) && (image2 != (Image *) NULL))
1016                image2=DestroyImage(image2);
1017              ThrowReaderException(CoderError,
1018                "MultidimensionalMatricesAreNotSupported");
1019            }
1020          break;
1021       case 16: z2=z = ReadBlobXXXLong(image2);  /* 4D matrix animation */
1022          if(z!=3 && z!=1)
1023            {
1024              if (clone_info != (ImageInfo *) NULL)
1025                clone_info=DestroyImageInfo(clone_info);
1026              if ((image != image2) && (image2 != (Image *) NULL))
1027                image2=DestroyImage(image2);
1028              ThrowReaderException(CoderError,
1029                "MultidimensionalMatricesAreNotSupported");
1030            }
1031           Frames = ReadBlobXXXLong(image2);
1032           if (Frames == 0)
1033             {
1034               if (clone_info != (ImageInfo *) NULL)
1035                 clone_info=DestroyImageInfo(clone_info);
1036               if ((image != image2) && (image2 != (Image *) NULL))
1037                 image2=DestroyImage(image2);
1038               ThrowReaderException(CorruptImageError,"ImproperImageHeader");
1039             }
1040           if (AcquireMagickResource(ListLengthResource,Frames) == MagickFalse)
1041             {
1042               if (clone_info != (ImageInfo *) NULL)
1043                 clone_info=DestroyImageInfo(clone_info);
1044               if ((image != image2) && (image2 != (Image *) NULL))
1045                 image2=DestroyImage(image2);
1046               ThrowReaderException(ResourceLimitError,"ListLengthExceedsLimit");
1047             }
1048          break;
1049       default:
1050         if (clone_info != (ImageInfo *) NULL)
1051           clone_info=DestroyImageInfo(clone_info);
1052         if ((image != image2) && (image2 != (Image *) NULL))
1053           image2=DestroyImage(image2);
1054         ThrowReaderException(CoderError, "MultidimensionalMatricesAreNotSupported");
1055     }
1056
1057     MATLAB_HDR.Flag1 = ReadBlobXXXShort(image2);
1058     MATLAB_HDR.NameFlag = ReadBlobXXXShort(image2);
1059
1060     if (logging) (void)LogMagickEvent(CoderEvent,GetMagickModule(),
1061           "MATLAB_HDR.StructureClass %d",MATLAB_HDR.StructureClass);
1062     if (MATLAB_HDR.StructureClass != mxCHAR_CLASS &&
1063         MATLAB_HDR.StructureClass != mxSINGLE_CLASS &&    /* float + complex float */
1064         MATLAB_HDR.StructureClass != mxDOUBLE_CLASS &&    /* double + complex double */
1065         MATLAB_HDR.StructureClass != mxINT8_CLASS &&
1066         MATLAB_HDR.StructureClass != mxUINT8_CLASS &&    /* uint8 + uint8 3D */
1067         MATLAB_HDR.StructureClass != mxINT16_CLASS &&
1068         MATLAB_HDR.StructureClass != mxUINT16_CLASS &&    /* uint16 + uint16 3D */
1069         MATLAB_HDR.StructureClass != mxINT32_CLASS &&
1070         MATLAB_HDR.StructureClass != mxUINT32_CLASS &&    /* uint32 + uint32 3D */
1071         MATLAB_HDR.StructureClass != mxINT64_CLASS &&
1072         MATLAB_HDR.StructureClass != mxUINT64_CLASS)    /* uint64 + uint64 3D */
1073       {
1074         if ((image2 != (Image*) NULL) && (image2 != (Image *) image))
1075           {
1076             CloseBlob(image2);
1077             DeleteImageFromList(&image2);
1078           }
1079         if (clone_info != (ImageInfo *) NULL)
1080           clone_info=DestroyImageInfo(clone_info);
1081         ThrowReaderException(CoderError,"UnsupportedCellTypeInTheMatrix");
1082       }
1083
1084     switch (MATLAB_HDR.NameFlag)
1085     {
1086       case 0:
1087         size = ReadBlobXXXLong(image2);  /* Object name string size */
1088         size = 4 * (ssize_t) ((size + 3 + 1) / 4);
1089         (void) SeekBlob(image2, size, SEEK_CUR);
1090         break;
1091       case 1:
1092       case 2:
1093       case 3:
1094       case 4:
1095         (void) ReadBlob(image2, 4, (unsigned char *) &size); /* Object name string */
1096         break;
1097       default:
1098         goto MATLAB_KO;
1099     }
1100
1101     CellType = ReadBlobXXXLong(image2);    /* Additional object type */
1102     if (logging)
1103       (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1104         "MATLAB_HDR.CellType: %.20g",(double) CellType);
1105
1106     (void) ReadBlob(image2, 4, (unsigned char *) &size);     /* data size */
1107
1108     NEXT_FRAME:
1109     switch (CellType)
1110     {
1111       case miINT8:
1112       case miUINT8:
1113         sample_size = 8;
1114         if(MATLAB_HDR.StructureFlag & FLAG_LOGICAL)
1115           image->depth = 1;
1116         else
1117           image->depth = 8;         /* Byte type cell */
1118         ldblk = (ssize_t) MATLAB_HDR.SizeX;
1119         break;
1120       case miINT16:
1121       case miUINT16:
1122         sample_size = 16;
1123         image->depth = 16;        /* Word type cell */
1124         ldblk = (ssize_t) (2 * MATLAB_HDR.SizeX);
1125         break;
1126       case miINT32:
1127       case miUINT32:
1128         sample_size = 32;
1129         image->depth = 32;        /* Dword type cell */
1130         ldblk = (ssize_t) (4 * MATLAB_HDR.SizeX);
1131         break;
1132       case miINT64:
1133       case miUINT64:
1134         sample_size = 64;
1135         image->depth = 64;        /* Qword type cell */
1136         ldblk = (ssize_t) (8 * MATLAB_HDR.SizeX);
1137         break;
1138       case miSINGLE:
1139         sample_size = 32;
1140         image->depth = 32;        /* double type cell */
1141         (void) SetImageOption(clone_info,"quantum:format","floating-point");
1142         if (MATLAB_HDR.StructureFlag & FLAG_COMPLEX)
1143           {              /* complex float type cell */
1144           }
1145         ldblk = (ssize_t) (4 * MATLAB_HDR.SizeX);
1146         break;
1147       case miDOUBLE:
1148         sample_size = 64;
1149         image->depth = 64;        /* double type cell */
1150         (void) SetImageOption(clone_info,"quantum:format","floating-point");
1151 DisableMSCWarning(4127)
1152         if (sizeof(double) != 8)
1153 RestoreMSCWarning
1154           {
1155             if (clone_info != (ImageInfo *) NULL)
1156               clone_info=DestroyImageInfo(clone_info);
1157             if ((image != image2) && (image2 != (Image *) NULL))
1158               image2=DestroyImage(image2);
1159             ThrowReaderException(CoderError, "IncompatibleSizeOfDouble");
1160           }
1161         if (MATLAB_HDR.StructureFlag & FLAG_COMPLEX)
1162           {                         /* complex double type cell */
1163           }
1164         ldblk = (ssize_t) (8 * MATLAB_HDR.SizeX);
1165         break;
1166       default:
1167         if ((image != image2) && (image2 != (Image *) NULL))
1168           image2=DestroyImage(image2);
1169         if (clone_info)
1170           clone_info=DestroyImageInfo(clone_info);
1171         ThrowReaderException(CoderError, "UnsupportedCellTypeInTheMatrix");
1172     }
1173     (void) sample_size;
1174     image->columns = MATLAB_HDR.SizeX;
1175     image->rows = MATLAB_HDR.SizeY;
1176     image->colors = GetQuantumRange(image->depth);
1177     if (image->columns == 0 || image->rows == 0)
1178       goto MATLAB_KO;
1179     if((unsigned long)ldblk*MATLAB_HDR.SizeY > MATLAB_HDR.ObjectSize)
1180       goto MATLAB_KO;
1181     /* Image is gray when no complex flag is set and 2D Matrix */
1182     if ((MATLAB_HDR.DimFlag == 8) &&
1183         ((MATLAB_HDR.StructureFlag & FLAG_COMPLEX) == 0))
1184       {
1185         image->type=GrayscaleType;
1186         SetImageColorspace(image,GRAYColorspace,exception);
1187       }
1188
1189
1190     /*
1191       If ping is true, then only set image size and colors without
1192       reading any image data.
1193     */
1194     if (image_info->ping)
1195     {
1196       size_t temp = image->columns;
1197       image->columns = image->rows;
1198       image->rows = temp;
1199       goto done_reading; /* !!!!!! BAD  !!!! */
1200     }
1201     status=SetImageExtent(image,image->columns,image->rows,exception);
1202     if (status == MagickFalse)
1203       {
1204         if (clone_info != (ImageInfo *) NULL)
1205           clone_info=DestroyImageInfo(clone_info);
1206         if ((image != image2) && (image2 != (Image *) NULL))
1207           image2=DestroyImage(image2);
1208         return(DestroyImageList(image));
1209       }
1210     (void) SetImageBackgroundColor(image,exception);
1211     quantum_info=AcquireQuantumInfo(clone_info,image);
1212     if (quantum_info == (QuantumInfo *) NULL)
1213       {
1214         if (clone_info != (ImageInfo *) NULL)
1215           clone_info=DestroyImageInfo(clone_info);
1216         if ((image != image2) && (image2 != (Image *) NULL))
1217           image2=DestroyImage(image2);
1218         ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
1219       }
1220
1221   /* ----- Load raster data ----- */
1222     BImgBuff = (unsigned char *) AcquireQuantumMemory((size_t) (ldblk),sizeof(double));    /* Ldblk was set in the check phase */
1223     if (BImgBuff == NULL)
1224       {
1225         if (clone_info != (ImageInfo *) NULL)
1226           clone_info=DestroyImageInfo(clone_info);
1227         if ((image != image2) && (image2 != (Image *) NULL))
1228           image2=DestroyImage(image2);
1229         if (quantum_info != (QuantumInfo *) NULL)
1230           quantum_info=DestroyQuantumInfo(quantum_info);
1231         ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
1232       }
1233     (void) memset(BImgBuff,0,ldblk*sizeof(double));
1234
1235     MinVal = 0;
1236     MaxVal = 0;
1237     if (CellType==miDOUBLE || CellType==miSINGLE)        /* Find Min and Max Values for floats */
1238       {
1239         CalcMinMax(image2,image_info->endian,MATLAB_HDR.SizeX,MATLAB_HDR.SizeY,
1240           CellType,ldblk,BImgBuff,&quantum_info->minimum,
1241           &quantum_info->maximum);
1242       }
1243
1244     /* Main loop for reading all scanlines */
1245     if(z==1) z=0; /* read grey scanlines */
1246     /* else read color scanlines */
1247     do
1248     {
1249       for (i = 0; i < (ssize_t) MATLAB_HDR.SizeY; i++)
1250       {
1251         q=GetAuthenticPixels(image,0,MATLAB_HDR.SizeY-i-1,image->columns,1,exception);
1252         if (q == (Quantum *) NULL)
1253           {
1254             if (logging) (void)LogMagickEvent(CoderEvent,GetMagickModule(),
1255               "  MAT set image pixels returns unexpected NULL on a row %u.", (unsigned)(MATLAB_HDR.SizeY-i-1));
1256             goto done_reading;    /* Skip image rotation, when cannot set image pixels    */
1257           }
1258         if(ReadBlob(image2,ldblk,(unsigned char *)BImgBuff) != (ssize_t) ldblk)
1259           {
1260             if (logging) (void)LogMagickEvent(CoderEvent,GetMagickModule(),
1261               "  MAT cannot read scanrow %u from a file.", (unsigned)(MATLAB_HDR.SizeY-i-1));
1262             goto ExitLoop;
1263           }
1264         if((CellType==miINT8 || CellType==miUINT8) && (MATLAB_HDR.StructureFlag & FLAG_LOGICAL))
1265         {
1266           FixLogical((unsigned char *)BImgBuff,ldblk);
1267           if(ImportQuantumPixels(image,(CacheView *) NULL,quantum_info,z2qtype[z],BImgBuff,exception) <= 0)
1268             {
1269 ImportQuantumPixelsFailed:
1270               if (logging) (void)LogMagickEvent(CoderEvent,GetMagickModule(),
1271                 "  MAT failed to ImportQuantumPixels for a row %u", (unsigned)(MATLAB_HDR.SizeY-i-1));
1272               break;
1273             }
1274         }
1275         else
1276         {
1277           if(ImportQuantumPixels(image,(CacheView *) NULL,quantum_info,z2qtype[z],BImgBuff,exception) <= 0)
1278             goto ImportQuantumPixelsFailed;
1279
1280
1281           if (z<=1 &&       /* fix only during a last pass z==0 || z==1 */
1282              (CellType==miINT8 || CellType==miINT16 || CellType==miINT32 || CellType==miINT64))
1283             FixSignedValues(image,q,MATLAB_HDR.SizeX);
1284         }
1285
1286         if (!SyncAuthenticPixels(image,exception))
1287           {
1288             if (logging) (void)LogMagickEvent(CoderEvent,GetMagickModule(),
1289               "  MAT failed to sync image pixels for a row %u", (unsigned)(MATLAB_HDR.SizeY-i-1));
1290             goto ExitLoop;
1291           }
1292       }
1293     } while(z-- >= 2);
1294 ExitLoop:
1295
1296
1297     /* Read complex part of numbers here */
1298     if (MATLAB_HDR.StructureFlag & FLAG_COMPLEX)
1299     {        /* Find Min and Max Values for complex parts of floats */
1300       CellType = ReadBlobXXXLong(image2);    /* Additional object type */
1301       i = ReadBlobXXXLong(image2);           /* size of a complex part - toss away*/
1302
1303       if (CellType==miDOUBLE || CellType==miSINGLE)
1304       {
1305         CalcMinMax(image2,  image_info->endian, MATLAB_HDR.SizeX, MATLAB_HDR.SizeY, CellType, ldblk, BImgBuff, &MinVal, &MaxVal);
1306       }
1307
1308       if (CellType==miDOUBLE)
1309         for (i = 0; i < (ssize_t) MATLAB_HDR.SizeY; i++)
1310         {
1311           ReadBlobDoublesXXX(image2, ldblk, (double *)BImgBuff);
1312           InsertComplexDoubleRow(image, (double *)BImgBuff, i, MinVal, MaxVal,
1313             exception);
1314         }
1315
1316       if (CellType==miSINGLE)
1317         for (i = 0; i < (ssize_t) MATLAB_HDR.SizeY; i++)
1318         {
1319           ReadBlobFloatsXXX(image2, ldblk, (float *)BImgBuff);
1320           InsertComplexFloatRow(image,(float *)BImgBuff,i,MinVal,MaxVal,
1321             exception);
1322         }
1323     }
1324
1325       /* Image is gray when no complex flag is set and 2D Matrix AGAIN!!! */
1326     if ((MATLAB_HDR.DimFlag == 8) &&
1327         ((MATLAB_HDR.StructureFlag & FLAG_COMPLEX) == 0))
1328       image->type=GrayscaleType;
1329     if (image->depth == 1)
1330       image->type=BilevelType;
1331
1332     if(image2==image)
1333         image2 = NULL;    /* Remove shadow copy to an image before rotation. */
1334
1335       /*  Rotate image. */
1336     rotated_image = RotateImage(image, 90.0, exception);
1337     if (rotated_image != (Image *) NULL)
1338     {
1339         /* Remove page offsets added by RotateImage */
1340       rotated_image->page.x=0;
1341       rotated_image->page.y=0;
1342       rotated_image->colors = image->colors;
1343       DestroyBlob(rotated_image);
1344       rotated_image->blob=ReferenceBlob(image->blob);
1345       AppendImageToList(&image,rotated_image);
1346       DeleteImageFromList(&image);
1347     }
1348
1349 done_reading:
1350
1351     if(image2!=NULL)
1352       if(image2!=image)
1353       {
1354         DeleteImageFromList(&image2);
1355         if(clone_info)
1356         {
1357           if(clone_info->file)
1358           {
1359             fclose(clone_info->file);
1360             clone_info->file = NULL;
1361             (void) remove_utf8(clone_info->filename);
1362           }
1363         }
1364       }
1365     if (EOFBlob(image) != MagickFalse)
1366       break;
1367
1368       /* Allocate next image structure. */
1369     AcquireNextImage(image_info,image,exception);
1370     if (image->next == (Image *) NULL) break;
1371     image=SyncNextImageInList(image);
1372     image->columns=image->rows=0;
1373     image->colors=0;
1374
1375       /* row scan buffer is no longer needed */
1376     RelinquishMagickMemory(BImgBuff);
1377     BImgBuff = NULL;
1378     if (quantum_info != (QuantumInfo *) NULL)
1379       quantum_info=DestroyQuantumInfo(quantum_info);
1380
1381     if(--Frames>0)
1382     {
1383       z = z2;
1384       if(image2==NULL) image2 = image;
1385       if(!EOFBlob(image) && TellBlob(image)<filepos)
1386         goto NEXT_FRAME;
1387     }
1388     if ((image2!=NULL) && (image2!=image))   /* Does shadow temporary decompressed image exist? */
1389       {
1390 /*  CloseBlob(image2); */
1391         DeleteImageFromList(&image2);
1392         if(clone_info)
1393         {
1394           if(clone_info->file)
1395           {
1396             fclose(clone_info->file);
1397             clone_info->file = NULL;
1398             (void) remove_utf8(clone_info->filename);
1399           }
1400         }
1401       }
1402
1403     if (clone_info)
1404       clone_info=DestroyImageInfo(clone_info);
1405   }
1406
1407   RelinquishMagickMemory(BImgBuff);
1408   if (quantum_info != (QuantumInfo *) NULL)
1409     quantum_info=DestroyQuantumInfo(quantum_info);
1410 END_OF_READING:
1411   CloseBlob(image);
1412
1413
1414   {
1415     Image *p;
1416     ssize_t scene=0;
1417
1418     /*
1419       Rewind list, removing any empty images while rewinding.
1420     */
1421     p=image;
1422     image=NULL;
1423     while (p != (Image *) NULL)
1424       {
1425         Image *tmp=p;
1426         if ((p->rows == 0) || (p->columns == 0)) {
1427           p=p->previous;
1428           if (tmp == image2)
1429             image2=(Image *) NULL;
1430           DeleteImageFromList(&tmp);
1431         } else {
1432           image=p;
1433           p=p->previous;
1434         }
1435       }
1436
1437     /*
1438       Fix scene numbers
1439     */
1440     for (p=image; p != (Image *) NULL; p=p->next)
1441       p->scene=scene++;
1442   }
1443
1444   if(clone_info != NULL)  /* cleanup garbage file from compression */
1445   {
1446     if(clone_info->file)
1447     {
1448       fclose(clone_info->file);
1449       clone_info->file = NULL;
1450       (void) remove_utf8(clone_info->filename);
1451     }
1452     DestroyImageInfo(clone_info);
1453     clone_info = NULL;
1454   }
1455   if (logging) (void)LogMagickEvent(CoderEvent,GetMagickModule(),"return");
1456   if ((image != image2) && (image2 != (Image *) NULL))
1457     image2=DestroyImage(image2);
1458   if (image == (Image *) NULL)
1459     ThrowReaderException(CorruptImageError,"ImproperImageHeader")
1460   return(image);
1461 }
1462 \f
1463 /*
1464 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1465 %                                                                             %
1466 %                                                                             %
1467 %                                                                             %
1468 %   R e g i s t e r M A T I m a g e                                           %
1469 %                                                                             %
1470 %                                                                             %
1471 %                                                                             %
1472 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1473 %
1474 %  Method RegisterMATImage adds attributes for the MAT image format to
1475 %  the list of supported formats.  The attributes include the image format
1476 %  tag, a method to read and/or write the format, whether the format
1477 %  supports the saving of more than one frame to the same file or blob,
1478 %  whether the format supports native in-memory I/O, and a brief
1479 %  description of the format.
1480 %
1481 %  The format of the RegisterMATImage method is:
1482 %
1483 %      size_t RegisterMATImage(void)
1484 %
1485 */
1486 ModuleExport size_t RegisterMATImage(void)
1487 {
1488   MagickInfo
1489     *entry;
1490
1491   entry=AcquireMagickInfo("MAT","MAT","MATLAB level 5 image format");
1492   entry->decoder=(DecodeImageHandler *) ReadMATImage;
1493   entry->encoder=(EncodeImageHandler *) WriteMATImage;
1494   entry->flags^=CoderBlobSupportFlag;
1495   entry->flags|=CoderDecoderSeekableStreamFlag;
1496   (void) RegisterMagickInfo(entry);
1497   return(MagickImageCoderSignature);
1498 }
1499 \f
1500 /*
1501 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1502 %                                                                             %
1503 %                                                                             %
1504 %                                                                             %
1505 %   U n r e g i s t e r M A T I m a g e                                       %
1506 %                                                                             %
1507 %                                                                             %
1508 %                                                                             %
1509 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1510 %
1511 %  Method UnregisterMATImage removes format registrations made by the
1512 %  MAT module from the list of supported formats.
1513 %
1514 %  The format of the UnregisterMATImage method is:
1515 %
1516 %      UnregisterMATImage(void)
1517 %
1518 */
1519 ModuleExport void UnregisterMATImage(void)
1520 {
1521   (void) UnregisterMagickInfo("MAT");
1522 }
1523 \f
1524 /*
1525 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1526 %                                                                             %
1527 %                                                                             %
1528 %                                                                             %
1529 %   W r i t e M A T L A B I m a g e                                           %
1530 %                                                                             %
1531 %                                                                             %
1532 %                                                                             %
1533 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1534 %
1535 %  Function WriteMATImage writes an Matlab matrix to a file.
1536 %
1537 %  The format of the WriteMATImage method is:
1538 %
1539 %      MagickBooleanType WriteMATImage(const ImageInfo *image_info,
1540 %        Image *image,ExceptionInfo *exception)
1541 %
1542 %  A description of each parameter follows.
1543 %
1544 %    o image_info: Specifies a pointer to a ImageInfo structure.
1545 %
1546 %    o image:  A pointer to an Image structure.
1547 %
1548 %    o exception: return any errors or warnings in this structure.
1549 %
1550 */
1551 static MagickBooleanType WriteMATImage(const ImageInfo *image_info,Image *image,
1552   ExceptionInfo *exception)
1553 {
1554   char
1555     MATLAB_HDR[0x80];
1556
1557   MagickBooleanType
1558     status;
1559
1560   MagickOffsetType
1561     scene;
1562
1563   size_t
1564     imageListLength;
1565
1566   struct tm
1567     local_time;
1568
1569   time_t
1570     current_time;
1571
1572   /*
1573     Open output image file.
1574   */
1575   assert(image_info != (const ImageInfo *) NULL);
1576   assert(image_info->signature == MagickCoreSignature);
1577   assert(image != (Image *) NULL);
1578   assert(image->signature == MagickCoreSignature);
1579   (void) LogMagickEvent(CoderEvent,GetMagickModule(),"enter MAT");
1580   assert(exception != (ExceptionInfo *) NULL);
1581   assert(exception->signature == MagickCoreSignature);
1582   status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
1583   if (status == MagickFalse)
1584     return(MagickFalse);
1585   image->depth=8;
1586
1587   current_time=time((time_t *) NULL);
1588 #if defined(MAGICKCORE_HAVE_LOCALTIME_R)
1589   (void) localtime_r(&current_time,&local_time);
1590 #else
1591   (void) memcpy(&local_time,localtime(&current_time),sizeof(local_time));
1592 #endif
1593   (void) memset(MATLAB_HDR,' ',MagickMin(sizeof(MATLAB_HDR),124));
1594   FormatLocaleString(MATLAB_HDR,sizeof(MATLAB_HDR),
1595     "MATLAB 5.0 MAT-file, Platform: %s, Created on: %s %s %2d %2d:%2d:%2d %d",
1596     OsDesc,DayOfWTab[local_time.tm_wday],MonthsTab[local_time.tm_mon],
1597     local_time.tm_mday,local_time.tm_hour,local_time.tm_min,
1598     local_time.tm_sec,local_time.tm_year+1900);
1599   MATLAB_HDR[0x7C]=0;
1600   MATLAB_HDR[0x7D]=1;
1601   MATLAB_HDR[0x7E]='I';
1602   MATLAB_HDR[0x7F]='M';
1603   (void) WriteBlob(image,sizeof(MATLAB_HDR),(unsigned char *) MATLAB_HDR);
1604   scene=0;
1605   imageListLength=GetImageListLength(image);
1606   do
1607   {
1608     char
1609       padding;
1610
1611     MagickBooleanType
1612       is_gray;
1613
1614     QuantumInfo
1615       *quantum_info;
1616
1617     size_t
1618       data_size;
1619
1620     unsigned char
1621       *pixels;
1622
1623     unsigned int
1624       z;
1625
1626     (void) TransformImageColorspace(image,sRGBColorspace,exception);
1627     is_gray=SetImageGray(image,exception);
1628     z=(is_gray != MagickFalse) ? 0 : 3;
1629
1630     /*
1631       Store MAT header.
1632     */
1633     data_size = image->rows * image->columns;
1634     if (is_gray == MagickFalse)
1635       data_size*=3;
1636     padding=((unsigned char)(data_size-1) & 0x7) ^ 0x7;
1637
1638     (void) WriteBlobLSBLong(image,miMATRIX);
1639     (void) WriteBlobLSBLong(image,(unsigned int) data_size+padding+
1640       ((is_gray != MagickFalse) ? 48 : 56));
1641     (void) WriteBlobLSBLong(image,0x6); /* 0x88 */
1642     (void) WriteBlobLSBLong(image,0x8); /* 0x8C */
1643     (void) WriteBlobLSBLong(image,0x6); /* 0x90 */
1644     (void) WriteBlobLSBLong(image,0);
1645     (void) WriteBlobLSBLong(image,0x5); /* 0x98 */
1646     (void) WriteBlobLSBLong(image,(is_gray != MagickFalse) ? 0x8 : 0xC); /* 0x9C - DimFlag */
1647     (void) WriteBlobLSBLong(image,(unsigned int) image->rows);    /* x: 0xA0 */
1648     (void) WriteBlobLSBLong(image,(unsigned int) image->columns); /* y: 0xA4 */
1649     if (is_gray == MagickFalse)
1650       {
1651         (void) WriteBlobLSBLong(image,3); /* z: 0xA8 */
1652         (void) WriteBlobLSBLong(image,0);
1653       }
1654     (void) WriteBlobLSBShort(image,1);  /* 0xB0 */
1655     (void) WriteBlobLSBShort(image,1);  /* 0xB2 */
1656     (void) WriteBlobLSBLong(image,'M'); /* 0xB4 */
1657     (void) WriteBlobLSBLong(image,0x2); /* 0xB8 */
1658     (void) WriteBlobLSBLong(image,(unsigned int) data_size); /* 0xBC */
1659
1660     /*
1661       Store image data.
1662     */
1663     quantum_info=AcquireQuantumInfo(image_info,image);
1664     if (quantum_info == (QuantumInfo *) NULL)
1665       ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
1666     pixels=(unsigned char *) GetQuantumPixels(quantum_info);
1667     do
1668     {
1669       const Quantum
1670         *p;
1671
1672       ssize_t
1673         y;
1674
1675       for (y=0; y < (ssize_t)image->columns; y++)
1676       {
1677         p=GetVirtualPixels(image,y,0,1,image->rows,exception);
1678         if (p == (const Quantum *) NULL)
1679           break;
1680         (void) ExportQuantumPixels(image,(CacheView *) NULL,quantum_info,
1681           z2qtype[z],pixels,exception);
1682         (void) WriteBlob(image,image->rows,pixels);
1683       }
1684       if (SyncAuthenticPixels(image,exception) == MagickFalse)
1685         break;
1686     } while (z-- >= 2);
1687     while (padding-- > 0)
1688       (void) WriteBlobByte(image,0);
1689     quantum_info=DestroyQuantumInfo(quantum_info);
1690     if (GetNextImageInList(image) == (Image *) NULL)
1691       break;
1692     image=SyncNextImageInList(image);
1693     status=SetImageProgress(image,SaveImagesTag,scene++,imageListLength);
1694     if (status == MagickFalse)
1695       break;
1696   } while (image_info->adjoin != MagickFalse);
1697   (void) CloseBlob(image);
1698   return(status);
1699 }