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 / MaxVal) * (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 *DecompressBlock(Image *orig, unsigned int *Size, ImageInfo *clone_info, ExceptionInfo *exception)
 476 {
 477
 478 Image *image2;
 479 void *CacheBlock, *DecompressBlock;
 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   CacheBlock = AcquireQuantumMemory((size_t)((*Size<16384)?*Size:16384),sizeof(unsigned char *));
 499   if(CacheBlock==NULL) return NULL;
 500   DecompressBlock = AcquireQuantumMemory((size_t)(4096),sizeof(unsigned char *));
 501   if(DecompressBlock==NULL)
 502   {
 503     RelinquishMagickMemory(CacheBlock);
 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(CacheBlock);
 514     RelinquishMagickMemory(DecompressBlock);
 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(CacheBlock);
 526       RelinquishMagickMemory(DecompressBlock);
 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 *) CacheBlock);
 540     zip_info.next_in = (Bytef *) CacheBlock;
 541     zip_info.avail_in = (uInt) magick_size;
 542
 543     while(zip_info.avail_in>0)
 544     {
 545       zip_info.avail_out = 4096;
 546       zip_info.next_out = (Bytef *) DecompressBlock;
 547       zip_status = inflate(&zip_info,Z_NO_FLUSH);
 548       if ((zip_status != Z_OK) && (zip_status != Z_STREAM_END))
 549         break;
 550       extent=fwrite(DecompressBlock, 4096-zip_info.avail_out, 1, mat_file);
 551       (void) extent;
 552       TotalSize += 4096-zip_info.avail_out;
 553
 554       if(zip_status == Z_STREAM_END) goto DblBreak;
 555     }
 556     if ((zip_status != Z_OK) && (zip_status != Z_STREAM_END))
 557       break;
 558
 559     *Size -= magick_size;
 560   }
 561 DblBreak:
 562
 563   inflateEnd(&zip_info);
 564   (void)fclose(mat_file);
 565   RelinquishMagickMemory(CacheBlock);
 566   RelinquishMagickMemory(DecompressBlock);
 567   *Size = TotalSize;
 568
 569   if((clone_info->file=fopen(clone_info->filename,"rb"))==NULL) goto UnlinkFile;
 570   if( (image2 = AcquireImage(clone_info,exception))==NULL ) goto EraseFile;
 571   status = OpenBlob(clone_info,image2,ReadBinaryBlobMode,exception);
 572   if (status == MagickFalse)
 573   {
 574     DeleteImageFromList(&image2);
 575 EraseFile:
 576     fclose(clone_info->file);
 577     clone_info->file = NULL;
 578 UnlinkFile:
 579     RelinquishUniqueFileResource(clone_info->filename);
 580     return NULL;
 581   }
 582
 583   return image2;
 584 }
 585 #endif
 586
 587 static Image *ReadMATImageV4(const ImageInfo *image_info,Image *image,
 588   ExceptionInfo *exception)
 589 {
 590   typedef struct {
 591     unsigned char Type[4];
 592     unsigned int nRows;
 593     unsigned int nCols;
 594     unsigned int imagf;
 595     unsigned int nameLen;
 596   } MAT4_HDR;
 597
 598   long
 599     ldblk;
 600
 601   EndianType
 602     endian;
 603
 604   Image
 605     *rotate_image;
 606
 607   MagickBooleanType
 608     status;
 609
 610   MAT4_HDR
 611     HDR;
 612
 613   QuantumInfo
 614     *quantum_info;
 615
 616   QuantumFormatType
 617     format_type;
 618
 619   register ssize_t
 620     i;
 621
 622   ssize_t
 623     count,
 624     y;
 625
 626   unsigned char
 627     *pixels;
 628
 629   unsigned int
 630     depth;
 631
 632
 633   quantum_info=(QuantumInfo *) NULL;
 634   (void) SeekBlob(image,0,SEEK_SET);
 635   while (EOFBlob(image) != MagickFalse)
 636   {
 637     /*
 638      Object parser loop.
 639     */
 640     ldblk=ReadBlobLSBLong(image);
 641     if ((ldblk > 9999) || (ldblk < 0))
 642       break;
 643     HDR.Type[3]=ldblk % 10; ldblk /= 10;  /* T digit */
 644     HDR.Type[2]=ldblk % 10; ldblk /= 10;  /* P digit */
 645     HDR.Type[1]=ldblk % 10; ldblk /= 10;  /* O digit */
 646     HDR.Type[0]=ldblk;        /* M digit */
 647     if (HDR.Type[3] != 0)
 648       break;  /* Data format */
 649     if (HDR.Type[2] != 0)
 650       break;  /* Always 0 */
 651     if (HDR.Type[0] == 0)
 652       {
 653         HDR.nRows=ReadBlobLSBLong(image);
 654         HDR.nCols=ReadBlobLSBLong(image);
 655         HDR.imagf=ReadBlobLSBLong(image);
 656         HDR.nameLen=ReadBlobLSBLong(image);
 657         endian=LSBEndian;
 658       }
 659     else
 660       {
 661         HDR.nRows=ReadBlobMSBLong(image);
 662         HDR.nCols=ReadBlobMSBLong(image);
 663         HDR.imagf=ReadBlobMSBLong(image);
 664         HDR.nameLen=ReadBlobMSBLong(image);
 665         endian=MSBEndian;
 666       }
 667     if ((HDR.imagf != 0) && (HDR.imagf != 1))
 668       break;
 669     if (HDR.nameLen > 0xFFFF)
 670       return((Image *) NULL);
 671     for (i=0; i < (ssize_t) HDR.nameLen; i++)
 672     {
 673       int
 674         byte;
 675
 676       /*
 677         Skip matrix name.
 678       */
 679       byte=ReadBlobByte(image);
 680       if (byte == EOF)
 681         {
 682           ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
 683             image->filename);
 684           break;
 685         }
 686     }
 687     image->columns=(size_t) HDR.nRows;
 688     image->rows=(size_t) HDR.nCols;
 689     SetImageColorspace(image,GRAYColorspace,exception);
 690     if (image_info->ping != MagickFalse)
 691       {
 692         Swap(image->columns,image->rows);
 693         return(image);
 694       }
 695     status=SetImageExtent(image,image->columns,image->rows,exception);
 696     if (status == MagickFalse)
 697       return((Image *) NULL);
 698     quantum_info=AcquireQuantumInfo(image_info,image);
 699     if (quantum_info == (QuantumInfo *) NULL)
 700       return((Image *) NULL);
 701     switch(HDR.Type[1])
 702     {
 703       case 0:
 704         format_type=FloatingPointQuantumFormat;
 705         depth=64;
 706         break;
 707       case 1:
 708         format_type=FloatingPointQuantumFormat;
 709         depth=32;
 710         break;
 711       case 2:
 712         format_type=UnsignedQuantumFormat;
 713         depth=16;
 714         break;
 715       case 3:
 716         format_type=SignedQuantumFormat;
 717         depth=16;
 718         break;
 719       case 4:
 720         format_type=UnsignedQuantumFormat;
 721         depth=8;
 722         break;
 723       default:
 724         format_type=UnsignedQuantumFormat;
 725         depth=8;
 726         break;
 727     }
 728     image->depth=depth;
 729     if (HDR.Type[0] != 0)
 730       SetQuantumEndian(image,quantum_info,MSBEndian);
 731     status=SetQuantumFormat(image,quantum_info,format_type);
 732     status=SetQuantumDepth(image,quantum_info,depth);
 733     status=SetQuantumEndian(image,quantum_info,endian);
 734     SetQuantumScale(quantum_info,1.0);
 735     pixels=(unsigned char *) GetQuantumPixels(quantum_info);
 736     for (y=0; y < (ssize_t) image->rows; y++)
 737     {
 738       register Quantum
 739         *magick_restrict q;
 740
 741       count=ReadBlob(image,depth/8*image->columns,(char *) pixels);
 742       if (count == -1)
 743         break;
 744       q=QueueAuthenticPixels(image,0,image->rows-y-1,image->columns,1,
 745         exception);
 746       if (q == (Quantum *) NULL)
 747         break;
 748       (void) ImportQuantumPixels(image,(CacheView *) NULL,quantum_info,
 749         GrayQuantum,pixels,exception);
 750       if ((HDR.Type[1] == 2) || (HDR.Type[1] == 3))
 751         FixSignedValues(image,q,(int) image->columns);
 752       if (SyncAuthenticPixels(image,exception) == MagickFalse)
 753         break;
 754       if (image->previous == (Image *) NULL)
 755         {
 756           status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
 757             image->rows);
 758           if (status == MagickFalse)
 759             break;
 760         }
 761     }
 762     if (HDR.imagf == 1)
 763       for (y=0; y < (ssize_t) image->rows; y++)
 764       {
 765         /*
 766           Read complex pixels.
 767         */
 768         count=ReadBlob(image,depth/8*image->columns,(char *) pixels);
 769         if (count == -1)
 770           break;
 771         if (HDR.Type[1] == 0)
 772           InsertComplexDoubleRow(image,(double *) pixels,y,0,0,exception);
 773         else
 774           InsertComplexFloatRow(image,(float *) pixels,y,0,0,exception);
 775       }
 776     if (quantum_info != (QuantumInfo *) NULL)
 777       quantum_info=DestroyQuantumInfo(quantum_info);
 778     rotate_image=RotateImage(image,90.0,exception);
 779     if (rotate_image != (Image *) NULL)
 780       {
 781         image=DestroyImage(image);
 782         image=rotate_image;
 783       }
 784     if (EOFBlob(image) != MagickFalse)
 785       {
 786         ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
 787           image->filename);
 788         break;
 789       }
 790     /*
 791       Proceed to next image.
 792     */
 793     if (image_info->number_scenes != 0)
 794       if (image->scene >= (image_info->scene+image_info->number_scenes-1))
 795         break;
 796     /*
 797       Allocate next image structure.
 798     */
 799     AcquireNextImage(image_info,image,exception);
 800     if (GetNextImageInList(image) == (Image *) NULL)
 801       {
 802         image=DestroyImageList(image);
 803         return((Image *) NULL);
 804       }
 805     image=SyncNextImageInList(image);
 806     status=SetImageProgress(image,LoadImagesTag,TellBlob(image),
 807       GetBlobSize(image));
 808     if (status == MagickFalse)
 809       break;
 810   }
 811   (void) CloseBlob(image);
 812   return(GetFirstImageInList(image));
 813 }
 814 \f
 815 /*
 816 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 817 %                                                                             %
 818 %                                                                             %
 819 %                                                                             %
 820 %   R e a d M A T L A B i m a g e                                             %
 821 %                                                                             %
 822 %                                                                             %
 823 %                                                                             %
 824 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 825 %
 826 %  ReadMATImage() reads an MAT X image file and returns it.  It
 827 %  allocates the memory necessary for the new Image structure and returns a
 828 %  pointer to the new image.
 829 %
 830 %  The format of the ReadMATImage method is:
 831 %
 832 %      Image *ReadMATImage(const ImageInfo *image_info,ExceptionInfo *exception)
 833 %
 834 %  A description of each parameter follows:
 835 %
 836 %    o image:  Method ReadMATImage returns a pointer to the image after
 837 %      reading. A null image is returned if there is a memory shortage or if
 838 %      the image cannot be read.
 839 %
 840 %    o image_info: Specifies a pointer to a ImageInfo structure.
 841 %
 842 %    o exception: return any errors or warnings in this structure.
 843 %
 844 */
 845 static Image *ReadMATImage(const ImageInfo *image_info,ExceptionInfo *exception)
 846 {
 847   Image *image, *image2=NULL,
 848    *rotated_image;
 849   register Quantum *q;
 850
 851   unsigned int status;
 852   MATHeader MATLAB_HDR;
 853   size_t size;
 854   size_t CellType;
 855   QuantumInfo *quantum_info;
 856   ImageInfo *clone_info;
 857   int i;
 858   ssize_t ldblk;
 859   unsigned char *BImgBuff = NULL;
 860   double MinVal, MaxVal;
 861   unsigned z, z2;
 862   unsigned Frames;
 863   int logging;
 864   int sample_size;
 865   MagickOffsetType filepos=0x80;
 866   BlobInfo *blob;
 867   size_t one;
 868
 869   unsigned int (*ReadBlobXXXLong)(Image *image);
 870   unsigned short (*ReadBlobXXXShort)(Image *image);
 871   void (*ReadBlobDoublesXXX)(Image * image, size_t len, double *data);
 872   void (*ReadBlobFloatsXXX)(Image * image, size_t len, float *data);
 873
 874
 875   assert(image_info != (const ImageInfo *) NULL);
 876   assert(image_info->signature == MagickCoreSignature);
 877   assert(exception != (ExceptionInfo *) NULL);
 878   assert(exception->signature == MagickCoreSignature);
 879   logging = LogMagickEvent(CoderEvent,GetMagickModule(),"enter");
 880
 881   /*
 882      Open image file.
 883    */
 884   image = AcquireImage(image_info,exception);
 885
 886   status = OpenBlob(image_info, image, ReadBinaryBlobMode, exception);
 887   if (status == MagickFalse)
 888     {
 889       image=DestroyImageList(image);
 890       return((Image *) NULL);
 891     }
 892   /*
 893      Read MATLAB image.
 894    */
 895   quantum_info=(QuantumInfo *) NULL;
 896   clone_info=(ImageInfo *) NULL;
 897   if (ReadBlob(image,124,(unsigned char *) &MATLAB_HDR.identific) != 124)
 898     ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 899   if (strncmp(MATLAB_HDR.identific,"MATLAB",6) != 0)
 900     {
 901       image2=ReadMATImageV4(image_info,image,exception);
 902       if (image2  == NULL)
 903         goto MATLAB_KO;
 904       image=image2;
 905       goto END_OF_READING;
 906     }
 907   MATLAB_HDR.Version = ReadBlobLSBShort(image);
 908   if(ReadBlob(image,2,(unsigned char *) &MATLAB_HDR.EndianIndicator) != 2)
 909     ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 910
 911   if (logging)
 912     (void) LogMagickEvent(CoderEvent,GetMagickModule(),"  Endian %c%c",
 913       MATLAB_HDR.EndianIndicator[0],MATLAB_HDR.EndianIndicator[1]);
 914   if (!strncmp(MATLAB_HDR.EndianIndicator, "IM", 2))
 915   {
 916     ReadBlobXXXLong = ReadBlobLSBLong;
 917     ReadBlobXXXShort = ReadBlobLSBShort;
 918     ReadBlobDoublesXXX = ReadBlobDoublesLSB;
 919     ReadBlobFloatsXXX = ReadBlobFloatsLSB;
 920     image->endian = LSBEndian;
 921   }
 922   else if (!strncmp(MATLAB_HDR.EndianIndicator, "MI", 2))
 923   {
 924     ReadBlobXXXLong = ReadBlobMSBLong;
 925     ReadBlobXXXShort = ReadBlobMSBShort;
 926     ReadBlobDoublesXXX = ReadBlobDoublesMSB;
 927     ReadBlobFloatsXXX = ReadBlobFloatsMSB;
 928     image->endian = MSBEndian;
 929   }
 930   else
 931     goto MATLAB_KO;    /* unsupported endian */
 932
 933   if (strncmp(MATLAB_HDR.identific, "MATLAB", 6))
 934 MATLAB_KO: ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 935
 936   filepos = TellBlob(image);
 937   while(!EOFBlob(image)) /* object parser loop */
 938   {
 939     Frames = 1;
 940     (void) SeekBlob(image,filepos,SEEK_SET);
 941     /* printf("pos=%X\n",TellBlob(image)); */
 942
 943     MATLAB_HDR.DataType = ReadBlobXXXLong(image);
 944     if(EOFBlob(image)) break;
 945     MATLAB_HDR.ObjectSize = ReadBlobXXXLong(image);
 946     if(EOFBlob(image)) break;
 947     filepos += MATLAB_HDR.ObjectSize + 4 + 4;
 948
 949     clone_info=CloneImageInfo(image_info);
 950     image2 = image;
 951 #if defined(MAGICKCORE_ZLIB_DELEGATE)
 952     if(MATLAB_HDR.DataType == miCOMPRESSED)
 953     {
 954       image2 = DecompressBlock(image,&MATLAB_HDR.ObjectSize,clone_info,exception);
 955       if(image2==NULL) continue;
 956       MATLAB_HDR.DataType = ReadBlobXXXLong(image2); /* replace compressed object type. */
 957     }
 958 #endif
 959
 960     if(MATLAB_HDR.DataType!=miMATRIX) continue;  /* skip another objects. */
 961
 962     MATLAB_HDR.unknown1 = ReadBlobXXXLong(image2);
 963     MATLAB_HDR.unknown2 = ReadBlobXXXLong(image2);
 964
 965     MATLAB_HDR.unknown5 = ReadBlobXXXLong(image2);
 966     MATLAB_HDR.StructureClass = MATLAB_HDR.unknown5 & 0xFF;
 967     MATLAB_HDR.StructureFlag = (MATLAB_HDR.unknown5>>8) & 0xFF;
 968
 969     MATLAB_HDR.unknown3 = ReadBlobXXXLong(image2);
 970     if(image!=image2)
 971       MATLAB_HDR.unknown4 = ReadBlobXXXLong(image2);  /* ??? don't understand why ?? */
 972     MATLAB_HDR.unknown4 = ReadBlobXXXLong(image2);
 973     MATLAB_HDR.DimFlag = ReadBlobXXXLong(image2);
 974     MATLAB_HDR.SizeX = ReadBlobXXXLong(image2);
 975     MATLAB_HDR.SizeY = ReadBlobXXXLong(image2);
 976
 977
 978     switch(MATLAB_HDR.DimFlag)
 979     {
 980       case  8: z2=z=1; break;      /* 2D matrix*/
 981       case 12: z2=z = ReadBlobXXXLong(image2);  /* 3D matrix RGB*/
 982            (void) ReadBlobXXXLong(image2);
 983          if(z!=3) ThrowReaderException(CoderError, "MultidimensionalMatricesAreNotSupported");
 984          break;
 985       case 16: z2=z = ReadBlobXXXLong(image2);  /* 4D matrix animation */
 986          if(z!=3 && z!=1)
 987             ThrowReaderException(CoderError, "MultidimensionalMatricesAreNotSupported");
 988          Frames = ReadBlobXXXLong(image2);
 989          if (Frames == 0)
 990            ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 991          break;
 992       default: ThrowReaderException(CoderError, "MultidimensionalMatricesAreNotSupported");
 993     }
 994
 995     MATLAB_HDR.Flag1 = ReadBlobXXXShort(image2);
 996     MATLAB_HDR.NameFlag = ReadBlobXXXShort(image2);
 997
 998     if (logging) (void)LogMagickEvent(CoderEvent,GetMagickModule(),
 999           "MATLAB_HDR.StructureClass %d",MATLAB_HDR.StructureClass);
1000     if (MATLAB_HDR.StructureClass != mxCHAR_CLASS &&
1001         MATLAB_HDR.StructureClass != mxSINGLE_CLASS &&    /* float + complex float */
1002         MATLAB_HDR.StructureClass != mxDOUBLE_CLASS &&    /* double + complex double */
1003         MATLAB_HDR.StructureClass != mxINT8_CLASS &&
1004         MATLAB_HDR.StructureClass != mxUINT8_CLASS &&    /* uint8 + uint8 3D */
1005         MATLAB_HDR.StructureClass != mxINT16_CLASS &&
1006         MATLAB_HDR.StructureClass != mxUINT16_CLASS &&    /* uint16 + uint16 3D */
1007         MATLAB_HDR.StructureClass != mxINT32_CLASS &&
1008         MATLAB_HDR.StructureClass != mxUINT32_CLASS &&    /* uint32 + uint32 3D */
1009         MATLAB_HDR.StructureClass != mxINT64_CLASS &&
1010         MATLAB_HDR.StructureClass != mxUINT64_CLASS)    /* uint64 + uint64 3D */
1011       ThrowReaderException(CoderError,"UnsupportedCellTypeInTheMatrix");
1012
1013     switch (MATLAB_HDR.NameFlag)
1014     {
1015       case 0:
1016         size = ReadBlobXXXLong(image2);  /* Object name string size */
1017         size = 4 * (ssize_t) ((size + 3 + 1) / 4);
1018         (void) SeekBlob(image2, size, SEEK_CUR);
1019         break;
1020       case 1:
1021       case 2:
1022       case 3:
1023       case 4:
1024         (void) ReadBlob(image2, 4, (unsigned char *) &size); /* Object name string */
1025         break;
1026       default:
1027         goto MATLAB_KO;
1028     }
1029
1030     CellType = ReadBlobXXXLong(image2);    /* Additional object type */
1031     if (logging)
1032       (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1033         "MATLAB_HDR.CellType: %.20g",(double) CellType);
1034
1035     (void) ReadBlob(image2, 4, (unsigned char *) &size);     /* data size */
1036
1037     NEXT_FRAME:
1038     switch (CellType)
1039     {
1040       case miINT8:
1041       case miUINT8:
1042         sample_size = 8;
1043         if(MATLAB_HDR.StructureFlag & FLAG_LOGICAL)
1044           image->depth = 1;
1045         else
1046           image->depth = 8;         /* Byte type cell */
1047         ldblk = (ssize_t) MATLAB_HDR.SizeX;
1048         break;
1049       case miINT16:
1050       case miUINT16:
1051         sample_size = 16;
1052         image->depth = 16;        /* Word type cell */
1053         ldblk = (ssize_t) (2 * MATLAB_HDR.SizeX);
1054         break;
1055       case miINT32:
1056       case miUINT32:
1057         sample_size = 32;
1058         image->depth = 32;        /* Dword type cell */
1059         ldblk = (ssize_t) (4 * MATLAB_HDR.SizeX);
1060         break;
1061       case miINT64:
1062       case miUINT64:
1063         sample_size = 64;
1064         image->depth = 64;        /* Qword type cell */
1065         ldblk = (ssize_t) (8 * MATLAB_HDR.SizeX);
1066         break;
1067       case miSINGLE:
1068         sample_size = 32;
1069         image->depth = 32;        /* double type cell */
1070         (void) SetImageOption(clone_info,"quantum:format","floating-point");
1071         if (MATLAB_HDR.StructureFlag & FLAG_COMPLEX)
1072   {              /* complex float type cell */
1073   }
1074         ldblk = (ssize_t) (4 * MATLAB_HDR.SizeX);
1075         break;
1076       case miDOUBLE:
1077         sample_size = 64;
1078         image->depth = 64;        /* double type cell */
1079         (void) SetImageOption(clone_info,"quantum:format","floating-point");
1080 DisableMSCWarning(4127)
1081         if (sizeof(double) != 8)
1082 RestoreMSCWarning
1083           ThrowReaderException(CoderError, "IncompatibleSizeOfDouble");
1084         if (MATLAB_HDR.StructureFlag & FLAG_COMPLEX)
1085   {                         /* complex double type cell */
1086   }
1087         ldblk = (ssize_t) (8 * MATLAB_HDR.SizeX);
1088         break;
1089       default:
1090         ThrowReaderException(CoderError, "UnsupportedCellTypeInTheMatrix");
1091     }
1092     (void) sample_size;
1093     image->columns = MATLAB_HDR.SizeX;
1094     image->rows = MATLAB_HDR.SizeY;
1095     one=1;
1096     image->colors = one << image->depth;
1097     if (image->columns == 0 || image->rows == 0)
1098       goto MATLAB_KO;
1099     /* Image is gray when no complex flag is set and 2D Matrix */
1100     if ((MATLAB_HDR.DimFlag == 8) &&
1101         ((MATLAB_HDR.StructureFlag & FLAG_COMPLEX) == 0))
1102       {
1103         image->type=GrayscaleType;
1104         SetImageColorspace(image,GRAYColorspace,exception);
1105       }
1106
1107
1108     /*
1109       If ping is true, then only set image size and colors without
1110       reading any image data.
1111     */
1112     if (image_info->ping)
1113     {
1114       size_t temp = image->columns;
1115       image->columns = image->rows;
1116       image->rows = temp;
1117       goto done_reading; /* !!!!!! BAD  !!!! */
1118     }
1119     status=SetImageExtent(image,image->columns,image->rows,exception);
1120     if (status == MagickFalse)
1121       return(DestroyImageList(image));
1122     quantum_info=AcquireQuantumInfo(clone_info,image);
1123     if (quantum_info == (QuantumInfo *) NULL)
1124       ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
1125
1126   /* ----- Load raster data ----- */
1127     BImgBuff = (unsigned char *) AcquireQuantumMemory((size_t) (ldblk),sizeof(double));    /* Ldblk was set in the check phase */
1128     if (BImgBuff == NULL)
1129       ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
1130     (void) ResetMagickMemory(BImgBuff,0,ldblk*sizeof(double));
1131
1132     MinVal = 0;
1133     MaxVal = 0;
1134     if (CellType==miDOUBLE || CellType==miSINGLE)        /* Find Min and Max Values for floats */
1135     {
1136       CalcMinMax(image2, image_info->endian,  MATLAB_HDR.SizeX, MATLAB_HDR.SizeY, CellType, ldblk, BImgBuff, &quantum_info->minimum, &quantum_info->maximum);
1137     }
1138
1139     /* Main loop for reading all scanlines */
1140     if(z==1) z=0; /* read grey scanlines */
1141     /* else read color scanlines */
1142     do
1143     {
1144       for (i = 0; i < (ssize_t) MATLAB_HDR.SizeY; i++)
1145       {
1146         q=GetAuthenticPixels(image,0,MATLAB_HDR.SizeY-i-1,image->columns,1,exception);
1147         if (q == (Quantum *) NULL)
1148   {
1149     if (logging) (void)LogMagickEvent(CoderEvent,GetMagickModule(),
1150               "  MAT set image pixels returns unexpected NULL on a row %u.", (unsigned)(MATLAB_HDR.SizeY-i-1));
1151     goto done_reading;    /* Skip image rotation, when cannot set image pixels    */
1152   }
1153         if(ReadBlob(image2,ldblk,(unsigned char *)BImgBuff) != (ssize_t) ldblk)
1154   {
1155     if (logging) (void)LogMagickEvent(CoderEvent,GetMagickModule(),
1156              "  MAT cannot read scanrow %u from a file.", (unsigned)(MATLAB_HDR.SizeY-i-1));
1157     goto ExitLoop;
1158   }
1159         if((CellType==miINT8 || CellType==miUINT8) && (MATLAB_HDR.StructureFlag & FLAG_LOGICAL))
1160         {
1161           FixLogical((unsigned char *)BImgBuff,ldblk);
1162           if(ImportQuantumPixels(image,(CacheView *) NULL,quantum_info,z2qtype[z],BImgBuff,exception) <= 0)
1163     {
1164 ImportQuantumPixelsFailed:
1165       if (logging) (void)LogMagickEvent(CoderEvent,GetMagickModule(),
1166               "  MAT failed to ImportQuantumPixels for a row %u", (unsigned)(MATLAB_HDR.SizeY-i-1));
1167       break;
1168     }
1169         }
1170         else
1171         {
1172           if(ImportQuantumPixels(image,(CacheView *) NULL,quantum_info,z2qtype[z],BImgBuff,exception) <= 0)
1173       goto ImportQuantumPixelsFailed;
1174
1175
1176           if (z<=1 &&       /* fix only during a last pass z==0 || z==1 */
1177           (CellType==miINT8 || CellType==miINT16 || CellType==miINT32 || CellType==miINT64))
1178       FixSignedValues(image,q,MATLAB_HDR.SizeX);
1179         }
1180
1181         if (!SyncAuthenticPixels(image,exception))
1182   {
1183     if (logging) (void)LogMagickEvent(CoderEvent,GetMagickModule(),
1184             "  MAT failed to sync image pixels for a row %u", (unsigned)(MATLAB_HDR.SizeY-i-1));
1185     goto ExitLoop;
1186   }
1187       }
1188     } while(z-- >= 2);
1189 ExitLoop:
1190
1191
1192     /* Read complex part of numbers here */
1193     if (MATLAB_HDR.StructureFlag & FLAG_COMPLEX)
1194     {        /* Find Min and Max Values for complex parts of floats */
1195       CellType = ReadBlobXXXLong(image2);    /* Additional object type */
1196       i = ReadBlobXXXLong(image2);           /* size of a complex part - toss away*/
1197
1198       if (CellType==miDOUBLE || CellType==miSINGLE)
1199       {
1200         CalcMinMax(image2,  image_info->endian, MATLAB_HDR.SizeX, MATLAB_HDR.SizeY, CellType, ldblk, BImgBuff, &MinVal, &MaxVal);
1201       }
1202
1203       if (CellType==miDOUBLE)
1204         for (i = 0; i < (ssize_t) MATLAB_HDR.SizeY; i++)
1205   {
1206           ReadBlobDoublesXXX(image2, ldblk, (double *)BImgBuff);
1207           InsertComplexDoubleRow(image, (double *)BImgBuff, i, MinVal, MaxVal,
1208             exception);
1209   }
1210
1211       if (CellType==miSINGLE)
1212         for (i = 0; i < (ssize_t) MATLAB_HDR.SizeY; i++)
1213   {
1214           ReadBlobFloatsXXX(image2, ldblk, (float *)BImgBuff);
1215           InsertComplexFloatRow(image,(float *)BImgBuff,i,MinVal,MaxVal,
1216             exception);
1217   }
1218     }
1219
1220       /* Image is gray when no complex flag is set and 2D Matrix AGAIN!!! */
1221     if ((MATLAB_HDR.DimFlag == 8) &&
1222         ((MATLAB_HDR.StructureFlag & FLAG_COMPLEX) == 0))
1223       image->type=GrayscaleType;
1224     if (image->depth == 1)
1225       image->type=BilevelType;
1226
1227     if(image2==image)
1228         image2 = NULL;    /* Remove shadow copy to an image before rotation. */
1229
1230       /*  Rotate image. */
1231     rotated_image = RotateImage(image, 90.0, exception);
1232     if (rotated_image != (Image *) NULL)
1233     {
1234         /* Remove page offsets added by RotateImage */
1235       rotated_image->page.x=0;
1236       rotated_image->page.y=0;
1237
1238       blob = rotated_image->blob;
1239       rotated_image->blob = image->blob;
1240       rotated_image->colors = image->colors;
1241       image->blob = blob;
1242       AppendImageToList(&image,rotated_image);
1243       DeleteImageFromList(&image);
1244     }
1245
1246 done_reading:
1247
1248     if(image2!=NULL)
1249       if(image2!=image)
1250       {
1251         DeleteImageFromList(&image2);
1252   if(clone_info)
1253   {
1254           if(clone_info->file)
1255     {
1256             fclose(clone_info->file);
1257             clone_info->file = NULL;
1258             (void) remove_utf8(clone_info->filename);
1259     }
1260         }
1261       }
1262
1263       /* Allocate next image structure. */
1264     AcquireNextImage(image_info,image,exception);
1265     if (image->next == (Image *) NULL) break;
1266     image=SyncNextImageInList(image);
1267     image->columns=image->rows=0;
1268     image->colors=0;
1269
1270       /* row scan buffer is no longer needed */
1271     RelinquishMagickMemory(BImgBuff);
1272     BImgBuff = NULL;
1273
1274     if(--Frames>0)
1275     {
1276       z = z2;
1277       if(image2==NULL) image2 = image;
1278       goto NEXT_FRAME;
1279     }
1280     if ((image2!=NULL) && (image2!=image))   /* Does shadow temporary decompressed image exist? */
1281       {
1282 /*  CloseBlob(image2); */
1283         DeleteImageFromList(&image2);
1284         if(clone_info)
1285         {
1286           if(clone_info->file)
1287           {
1288             fclose(clone_info->file);
1289             clone_info->file = NULL;
1290             (void) remove_utf8(clone_info->filename);
1291           }
1292         }
1293         }
1294   }
1295
1296   RelinquishMagickMemory(BImgBuff);
1297   if (quantum_info != (QuantumInfo *) NULL)
1298     quantum_info=DestroyQuantumInfo(quantum_info);
1299 END_OF_READING:
1300   clone_info=DestroyImageInfo(clone_info);
1301   CloseBlob(image);
1302
1303
1304   {
1305     Image *p;
1306     ssize_t scene=0;
1307
1308     /*
1309       Rewind list, removing any empty images while rewinding.
1310     */
1311     p=image;
1312     image=NULL;
1313     while (p != (Image *) NULL)
1314       {
1315         Image *tmp=p;
1316         if ((p->rows == 0) || (p->columns == 0)) {
1317           p=p->previous;
1318           DeleteImageFromList(&tmp);
1319         } else {
1320           image=p;
1321           p=p->previous;
1322         }
1323       }
1324
1325     /*
1326       Fix scene numbers
1327     */
1328     for (p=image; p != (Image *) NULL; p=p->next)
1329       p->scene=scene++;
1330   }
1331
1332   if(clone_info != NULL)  /* cleanup garbage file from compression */
1333   {
1334     if(clone_info->file)
1335     {
1336       fclose(clone_info->file);
1337       clone_info->file = NULL;
1338       (void) remove_utf8(clone_info->filename);
1339     }
1340     DestroyImageInfo(clone_info);
1341     clone_info = NULL;
1342   }
1343   if (logging) (void)LogMagickEvent(CoderEvent,GetMagickModule(),"return");
1344   if(image==NULL)
1345     ThrowReaderException(CorruptImageError,"ImproperImageHeader");
1346   return (image);
1347 }
1348 \f
1349 /*
1350 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1351 %                                                                             %
1352 %                                                                             %
1353 %                                                                             %
1354 %   R e g i s t e r M A T I m a g e                                           %
1355 %                                                                             %
1356 %                                                                             %
1357 %                                                                             %
1358 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1359 %
1360 %  Method RegisterMATImage adds attributes for the MAT image format to
1361 %  the list of supported formats.  The attributes include the image format
1362 %  tag, a method to read and/or write the format, whether the format
1363 %  supports the saving of more than one frame to the same file or blob,
1364 %  whether the format supports native in-memory I/O, and a brief
1365 %  description of the format.
1366 %
1367 %  The format of the RegisterMATImage method is:
1368 %
1369 %      size_t RegisterMATImage(void)
1370 %
1371 */
1372 ModuleExport size_t RegisterMATImage(void)
1373 {
1374   MagickInfo
1375     *entry;
1376
1377   entry=AcquireMagickInfo("MAT","MAT","MATLAB level 5 image format");
1378   entry->decoder=(DecodeImageHandler *) ReadMATImage;
1379   entry->encoder=(EncodeImageHandler *) WriteMATImage;
1380   entry->flags^=CoderBlobSupportFlag;
1381   entry->flags|=CoderDecoderSeekableStreamFlag;
1382   (void) RegisterMagickInfo(entry);
1383   return(MagickImageCoderSignature);
1384 }
1385 \f
1386 /*
1387 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1388 %                                                                             %
1389 %                                                                             %
1390 %                                                                             %
1391 %   U n r e g i s t e r M A T I m a g e                                       %
1392 %                                                                             %
1393 %                                                                             %
1394 %                                                                             %
1395 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1396 %
1397 %  Method UnregisterMATImage removes format registrations made by the
1398 %  MAT module from the list of supported formats.
1399 %
1400 %  The format of the UnregisterMATImage method is:
1401 %
1402 %      UnregisterMATImage(void)
1403 %
1404 */
1405 ModuleExport void UnregisterMATImage(void)
1406 {
1407   (void) UnregisterMagickInfo("MAT");
1408 }
1409 \f
1410 /*
1411 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1412 %                                                                             %
1413 %                                                                             %
1414 %                                                                             %
1415 %   W r i t e M A T L A B I m a g e                                           %
1416 %                                                                             %
1417 %                                                                             %
1418 %                                                                             %
1419 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1420 %
1421 %  Function WriteMATImage writes an Matlab matrix to a file.
1422 %
1423 %  The format of the WriteMATImage method is:
1424 %
1425 %      MagickBooleanType WriteMATImage(const ImageInfo *image_info,
1426 %        Image *image,ExceptionInfo *exception)
1427 %
1428 %  A description of each parameter follows.
1429 %
1430 %    o image_info: Specifies a pointer to a ImageInfo structure.
1431 %
1432 %    o image:  A pointer to an Image structure.
1433 %
1434 %    o exception: return any errors or warnings in this structure.
1435 %
1436 */
1437 static MagickBooleanType WriteMATImage(const ImageInfo *image_info,Image *image,
1438   ExceptionInfo *exception)
1439 {
1440   char
1441     MATLAB_HDR[0x80];
1442
1443   MagickBooleanType
1444     status;
1445
1446   MagickOffsetType
1447     scene;
1448
1449   struct tm
1450     local_time;
1451
1452   time_t
1453     current_time;
1454
1455   /*
1456     Open output image file.
1457   */
1458   assert(image_info != (const ImageInfo *) NULL);
1459   assert(image_info->signature == MagickCoreSignature);
1460   assert(image != (Image *) NULL);
1461   assert(image->signature == MagickCoreSignature);
1462   (void) LogMagickEvent(CoderEvent,GetMagickModule(),"enter MAT");
1463   assert(exception != (ExceptionInfo *) NULL);
1464   assert(exception->signature == MagickCoreSignature);
1465   status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
1466   if (status == MagickFalse)
1467     return(MagickFalse);
1468   image->depth=8;
1469
1470   current_time=time((time_t *) NULL);
1471 #if defined(MAGICKCORE_HAVE_LOCALTIME_R)
1472   (void) localtime_r(&current_time,&local_time);
1473 #else
1474   (void) memcpy(&local_time,localtime(&current_time),sizeof(local_time));
1475 #endif
1476   (void) memset(MATLAB_HDR,' ',MagickMin(sizeof(MATLAB_HDR),124));
1477   FormatLocaleString(MATLAB_HDR,sizeof(MATLAB_HDR),
1478     "MATLAB 5.0 MAT-file, Platform: %s, Created on: %s %s %2d %2d:%2d:%2d %d",
1479     OsDesc,DayOfWTab[local_time.tm_wday],MonthsTab[local_time.tm_mon],
1480     local_time.tm_mday,local_time.tm_hour,local_time.tm_min,
1481     local_time.tm_sec,local_time.tm_year+1900);
1482   MATLAB_HDR[0x7C]=0;
1483   MATLAB_HDR[0x7D]=1;
1484   MATLAB_HDR[0x7E]='I';
1485   MATLAB_HDR[0x7F]='M';
1486   (void) WriteBlob(image,sizeof(MATLAB_HDR),(unsigned char *) MATLAB_HDR);
1487   scene=0;
1488   do
1489   {
1490     char
1491       padding;
1492
1493     MagickBooleanType
1494       is_gray;
1495
1496     QuantumInfo
1497       *quantum_info;
1498
1499     size_t
1500       data_size;
1501
1502     unsigned char
1503       *pixels;
1504
1505     unsigned int
1506       z;
1507
1508     (void) TransformImageColorspace(image,sRGBColorspace,exception);
1509     is_gray=SetImageGray(image,exception);
1510     z=(is_gray != MagickFalse) ? 0 : 3;
1511
1512     /*
1513       Store MAT header.
1514     */
1515     data_size = image->rows * image->columns;
1516     if (is_gray == MagickFalse)
1517       data_size*=3;
1518     padding=((unsigned char)(data_size-1) & 0x7) ^ 0x7;
1519
1520     (void) WriteBlobLSBLong(image,miMATRIX);
1521     (void) WriteBlobLSBLong(image,(unsigned int) data_size+padding+
1522       ((is_gray != MagickFalse) ? 48 : 56));
1523     (void) WriteBlobLSBLong(image,0x6); /* 0x88 */
1524     (void) WriteBlobLSBLong(image,0x8); /* 0x8C */
1525     (void) WriteBlobLSBLong(image,0x6); /* 0x90 */
1526     (void) WriteBlobLSBLong(image,0);
1527     (void) WriteBlobLSBLong(image,0x5); /* 0x98 */
1528     (void) WriteBlobLSBLong(image,(is_gray != MagickFalse) ? 0x8 : 0xC); /* 0x9C - DimFlag */
1529     (void) WriteBlobLSBLong(image,(unsigned int) image->rows);    /* x: 0xA0 */
1530     (void) WriteBlobLSBLong(image,(unsigned int) image->columns); /* y: 0xA4 */
1531     if (is_gray == MagickFalse)
1532       {
1533         (void) WriteBlobLSBLong(image,3); /* z: 0xA8 */
1534         (void) WriteBlobLSBLong(image,0);
1535       }
1536     (void) WriteBlobLSBShort(image,1);  /* 0xB0 */
1537     (void) WriteBlobLSBShort(image,1);  /* 0xB2 */
1538     (void) WriteBlobLSBLong(image,'M'); /* 0xB4 */
1539     (void) WriteBlobLSBLong(image,0x2); /* 0xB8 */
1540     (void) WriteBlobLSBLong(image,(unsigned int) data_size); /* 0xBC */
1541
1542     /*
1543       Store image data.
1544     */
1545     quantum_info=AcquireQuantumInfo(image_info,image);
1546     if (quantum_info == (QuantumInfo *) NULL)
1547       ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
1548     pixels=(unsigned char *) GetQuantumPixels(quantum_info);
1549     do
1550     {
1551       const Quantum
1552         *p;
1553
1554       ssize_t
1555         y;
1556
1557       for (y=0; y < (ssize_t)image->columns; y++)
1558       {
1559         p=GetVirtualPixels(image,y,0,1,image->rows,exception);
1560         if (p == (const Quantum *) NULL)
1561           break;
1562         (void) ExportQuantumPixels(image,(CacheView *) NULL,quantum_info,
1563           z2qtype[z],pixels,exception);
1564         (void) WriteBlob(image,image->rows,pixels);
1565       }
1566       if (SyncAuthenticPixels(image,exception) == MagickFalse)
1567         break;
1568     } while (z-- >= 2);
1569     while (padding-- > 0)
1570       (void) WriteBlobByte(image,0);
1571     quantum_info=DestroyQuantumInfo(quantum_info);
1572     if (GetNextImageInList(image) == (Image *) NULL)
1573       break;
1574     image=SyncNextImageInList(image);
1575     status=SetImageProgress(image,SaveImagesTag,scene++,
1576       GetImageListLength(image));
1577     if (status == MagickFalse)
1578       break;
1579   } while (image_info->adjoin != MagickFalse);
1580   (void) CloseBlob(image);
1581   return(status);
1582 }