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 *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     zip_info.next_in = (Bytef *) cache_block;
 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 *) decompress_block;
 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(decompress_block, 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 -= (unsigned int) magick_size;
 560   }
 561 DblBreak:
 562
 563   inflateEnd(&zip_info);
 564   (void)fclose(mat_file);
 565   RelinquishMagickMemory(cache_block);
 566   RelinquishMagickMemory(decompress_block);
 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     *rotated_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         if(HDR.imagf==1) ldblk *= 2;
 694         SeekBlob(image, HDR.nCols*ldblk, SEEK_CUR);
 695         goto skip_reading_current;
 696       }
 697     status=SetImageExtent(image,image->columns,image->rows,exception);
 698     if (status == MagickFalse)
 699       return((Image *) NULL);
 700     quantum_info=AcquireQuantumInfo(image_info,image);
 701     if (quantum_info == (QuantumInfo *) NULL)
 702       return((Image *) NULL);
 703     switch(HDR.Type[1])
 704     {
 705       case 0:
 706         format_type=FloatingPointQuantumFormat;
 707         depth=64;
 708         break;
 709       case 1:
 710         format_type=FloatingPointQuantumFormat;
 711         depth=32;
 712         break;
 713       case 2:
 714         format_type=UnsignedQuantumFormat;
 715         depth=16;
 716         break;
 717       case 3:
 718         format_type=SignedQuantumFormat;
 719         depth=16;
 720         break;
 721       case 4:
 722         format_type=UnsignedQuantumFormat;
 723         depth=8;
 724         break;
 725       default:
 726         format_type=UnsignedQuantumFormat;
 727         depth=8;
 728         break;
 729     }
 730     image->depth=depth;
 731     if (HDR.Type[0] != 0)
 732       SetQuantumEndian(image,quantum_info,MSBEndian);
 733     status=SetQuantumFormat(image,quantum_info,format_type);
 734     status=SetQuantumDepth(image,quantum_info,depth);
 735     status=SetQuantumEndian(image,quantum_info,endian);
 736     SetQuantumScale(quantum_info,1.0);
 737     pixels=(unsigned char *) GetQuantumPixels(quantum_info);
 738     for (y=0; y < (ssize_t) image->rows; y++)
 739     {
 740       register Quantum
 741         *magick_restrict q;
 742
 743       count=ReadBlob(image,depth/8*image->columns,(char *) pixels);
 744       if (count == -1)
 745         break;
 746       q=QueueAuthenticPixels(image,0,image->rows-y-1,image->columns,1,
 747         exception);
 748       if (q == (Quantum *) NULL)
 749         break;
 750       (void) ImportQuantumPixels(image,(CacheView *) NULL,quantum_info,
 751         GrayQuantum,pixels,exception);
 752       if ((HDR.Type[1] == 2) || (HDR.Type[1] == 3))
 753         FixSignedValues(image,q,(int) image->columns);
 754       if (SyncAuthenticPixels(image,exception) == MagickFalse)
 755         break;
 756       if (image->previous == (Image *) NULL)
 757         {
 758           status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
 759             image->rows);
 760           if (status == MagickFalse)
 761             break;
 762         }
 763     }
 764     if (HDR.imagf == 1)
 765       for (y=0; y < (ssize_t) image->rows; y++)
 766       {
 767         /*
 768           Read complex pixels.
 769         */
 770         count=ReadBlob(image,depth/8*image->columns,(char *) pixels);
 771         if (count == -1)
 772           break;
 773         if (HDR.Type[1] == 0)
 774           InsertComplexDoubleRow(image,(double *) pixels,y,0,0,exception);
 775         else
 776           InsertComplexFloatRow(image,(float *) pixels,y,0,0,exception);
 777       }
 778     if (quantum_info != (QuantumInfo *) NULL)
 779       quantum_info=DestroyQuantumInfo(quantum_info);
 780     if (EOFBlob(image) != MagickFalse)
 781       {
 782         ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
 783           image->filename);
 784         break;
 785       }
 786     rotated_image=RotateImage(image,90.0,exception);
 787     if (rotated_image != (Image *) NULL)
 788       {
 789         void
 790           *blob;
 791
 792         rotated_image->page.x=0;
 793         rotated_image->page.y=0;
 794         blob = rotated_image->blob;
 795         rotated_image->blob = image->blob;
 796         rotated_image->colors = image->colors;
 797         image->blob = blob;
 798         AppendImageToList(&image,rotated_image);
 799         DeleteImageFromList(&image->previous);
 800         image = rotated_image;
 801       }
 802     /*
 803       Proceed to next image.
 804     */
 805     if (image_info->number_scenes != 0)
 806       if (image->scene >= (image_info->scene+image_info->number_scenes-1))
 807         break;
 808     /*
 809       Allocate next image structure.
 810     */
 811 skip_reading_current:
 812     AcquireNextImage(image_info,image,exception);
 813     if (GetNextImageInList(image) == (Image *) NULL)
 814       {
 815         image=DestroyImageList(image);
 816         return((Image *) NULL);
 817       }
 818     image=SyncNextImageInList(image);
 819     status=SetImageProgress(image,LoadImagesTag,TellBlob(image),
 820       GetBlobSize(image));
 821     if (status == MagickFalse)
 822       break;
 823   }
 824   (void) CloseBlob(image);
 825   return(GetFirstImageInList(image));
 826 }
 827 \f
 828 /*
 829 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 830 %                                                                             %
 831 %                                                                             %
 832 %                                                                             %
 833 %   R e a d M A T L A B i m a g e                                             %
 834 %                                                                             %
 835 %                                                                             %
 836 %                                                                             %
 837 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 838 %
 839 %  ReadMATImage() reads an MAT X image file and returns it.  It
 840 %  allocates the memory necessary for the new Image structure and returns a
 841 %  pointer to the new image.
 842 %
 843 %  The format of the ReadMATImage method is:
 844 %
 845 %      Image *ReadMATImage(const ImageInfo *image_info,ExceptionInfo *exception)
 846 %
 847 %  A description of each parameter follows:
 848 %
 849 %    o image:  Method ReadMATImage returns a pointer to the image after
 850 %      reading. A null image is returned if there is a memory shortage or if
 851 %      the image cannot be read.
 852 %
 853 %    o image_info: Specifies a pointer to a ImageInfo structure.
 854 %
 855 %    o exception: return any errors or warnings in this structure.
 856 %
 857 */
 858 static Image *ReadMATImage(const ImageInfo *image_info,ExceptionInfo *exception)
 859 {
 860   Image *image, *image2=NULL,
 861    *rotated_image;
 862   register Quantum *q;
 863
 864   unsigned int status;
 865   MATHeader MATLAB_HDR;
 866   size_t size;
 867   size_t CellType;
 868   QuantumInfo *quantum_info;
 869   ImageInfo *clone_info;
 870   int i;
 871   ssize_t ldblk;
 872   unsigned char *BImgBuff = NULL;
 873   double MinVal, MaxVal;
 874   unsigned z, z2;
 875   unsigned Frames;
 876   int logging;
 877   int sample_size;
 878   MagickOffsetType filepos=0x80;
 879   BlobInfo *blob;
 880   size_t one;
 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     goto MATLAB_KO;    /* unsupported endian */
 946
 947   if (strncmp(MATLAB_HDR.identific, "MATLAB", 6))
 948     {
 949 MATLAB_KO:
 950       if ((image != image2) && (image2 != (Image *) NULL))
 951         image2=DestroyImage(image2);
 952       if (clone_info != (ImageInfo *) NULL)
 953         clone_info=DestroyImageInfo(clone_info);
 954       ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 955     }
 956
 957   filepos = TellBlob(image);
 958   while(!EOFBlob(image)) /* object parser loop */
 959   {
 960     Frames = 1;
 961     (void) SeekBlob(image,filepos,SEEK_SET);
 962     /* printf("pos=%X\n",TellBlob(image)); */
 963
 964     MATLAB_HDR.DataType = ReadBlobXXXLong(image);
 965     if(EOFBlob(image)) break;
 966     MATLAB_HDR.ObjectSize = ReadBlobXXXLong(image);
 967     if(EOFBlob(image)) break;
 968     if((MagickSizeType) (MATLAB_HDR.ObjectSize+filepos) > GetBlobSize(image))
 969       goto MATLAB_KO;
 970     filepos += MATLAB_HDR.ObjectSize + 4 + 4;
 971
 972     if (clone_info != (ImageInfo *) NULL)
 973       clone_info=DestroyImageInfo(clone_info);
 974     clone_info=CloneImageInfo(image_info);
 975     if ((image != image2) && (image2 != (Image *) NULL))
 976       image2=DestroyImage(image2);
 977     image2 = image;
 978 #if defined(MAGICKCORE_ZLIB_DELEGATE)
 979     if(MATLAB_HDR.DataType == miCOMPRESSED)
 980     {
 981       image2 = decompress_block(image,&MATLAB_HDR.ObjectSize,clone_info,exception);
 982       if(image2==NULL) continue;
 983       MATLAB_HDR.DataType = ReadBlobXXXLong(image2); /* replace compressed object type. */
 984     }
 985 #endif
 986
 987     if (MATLAB_HDR.DataType!=miMATRIX)
 988       {
 989         clone_info=DestroyImageInfo(clone_info);
 990         continue;  /* skip another objects. */
 991       }
 992
 993     MATLAB_HDR.unknown1 = ReadBlobXXXLong(image2);
 994     MATLAB_HDR.unknown2 = ReadBlobXXXLong(image2);
 995
 996     MATLAB_HDR.unknown5 = ReadBlobXXXLong(image2);
 997     MATLAB_HDR.StructureClass = MATLAB_HDR.unknown5 & 0xFF;
 998     MATLAB_HDR.StructureFlag = (MATLAB_HDR.unknown5>>8) & 0xFF;
 999
1000     MATLAB_HDR.unknown3 = ReadBlobXXXLong(image2);
1001     if(image!=image2)
1002       MATLAB_HDR.unknown4 = ReadBlobXXXLong(image2);  /* ??? don't understand why ?? */
1003     MATLAB_HDR.unknown4 = ReadBlobXXXLong(image2);
1004     MATLAB_HDR.DimFlag = ReadBlobXXXLong(image2);
1005     MATLAB_HDR.SizeX = ReadBlobXXXLong(image2);
1006     MATLAB_HDR.SizeY = ReadBlobXXXLong(image2);
1007
1008
1009     switch(MATLAB_HDR.DimFlag)
1010     {
1011       case  8: z2=z=1; break;      /* 2D matrix*/
1012       case 12: z2=z = ReadBlobXXXLong(image2);  /* 3D matrix RGB*/
1013            (void) ReadBlobXXXLong(image2);
1014          if(z!=3)
1015            {
1016              if (clone_info != (ImageInfo *) NULL)
1017                clone_info=DestroyImageInfo(clone_info);
1018              if ((image != image2) && (image2 != (Image *) NULL))
1019                image2=DestroyImage(image2);
1020              ThrowReaderException(CoderError,
1021                "MultidimensionalMatricesAreNotSupported");
1022            }
1023          break;
1024       case 16: z2=z = ReadBlobXXXLong(image2);  /* 4D matrix animation */
1025          if(z!=3 && z!=1)
1026            {
1027              if (clone_info != (ImageInfo *) NULL)
1028                clone_info=DestroyImageInfo(clone_info);
1029              if ((image != image2) && (image2 != (Image *) NULL))
1030                image2=DestroyImage(image2);
1031              ThrowReaderException(CoderError,
1032                "MultidimensionalMatricesAreNotSupported");
1033            }
1034          Frames = ReadBlobXXXLong(image2);
1035          if (Frames == 0)
1036            {
1037              if (clone_info != (ImageInfo *) NULL)
1038                clone_info=DestroyImageInfo(clone_info);
1039              if ((image != image2) && (image2 != (Image *) NULL))
1040                image2=DestroyImage(image2);
1041              ThrowReaderException(CorruptImageError,"ImproperImageHeader");
1042            }
1043          break;
1044       default:
1045         if (clone_info != (ImageInfo *) NULL)
1046           clone_info=DestroyImageInfo(clone_info);
1047         if ((image != image2) && (image2 != (Image *) NULL))
1048           image2=DestroyImage(image2);
1049         ThrowReaderException(CoderError, "MultidimensionalMatricesAreNotSupported");
1050     }
1051
1052     MATLAB_HDR.Flag1 = ReadBlobXXXShort(image2);
1053     MATLAB_HDR.NameFlag = ReadBlobXXXShort(image2);
1054
1055     if (logging) (void)LogMagickEvent(CoderEvent,GetMagickModule(),
1056           "MATLAB_HDR.StructureClass %d",MATLAB_HDR.StructureClass);
1057     if (MATLAB_HDR.StructureClass != mxCHAR_CLASS &&
1058         MATLAB_HDR.StructureClass != mxSINGLE_CLASS &&    /* float + complex float */
1059         MATLAB_HDR.StructureClass != mxDOUBLE_CLASS &&    /* double + complex double */
1060         MATLAB_HDR.StructureClass != mxINT8_CLASS &&
1061         MATLAB_HDR.StructureClass != mxUINT8_CLASS &&    /* uint8 + uint8 3D */
1062         MATLAB_HDR.StructureClass != mxINT16_CLASS &&
1063         MATLAB_HDR.StructureClass != mxUINT16_CLASS &&    /* uint16 + uint16 3D */
1064         MATLAB_HDR.StructureClass != mxINT32_CLASS &&
1065         MATLAB_HDR.StructureClass != mxUINT32_CLASS &&    /* uint32 + uint32 3D */
1066         MATLAB_HDR.StructureClass != mxINT64_CLASS &&
1067         MATLAB_HDR.StructureClass != mxUINT64_CLASS)    /* uint64 + uint64 3D */
1068       {
1069         if ((image2 != (Image*) NULL) && (image2 != (Image *) image))
1070           {
1071             CloseBlob(image2);
1072             DeleteImageFromList(&image2);
1073           }
1074         if (clone_info != (ImageInfo *) NULL)
1075           DestroyImageInfo(clone_info);
1076         ThrowReaderException(CoderError,"UnsupportedCellTypeInTheMatrix");
1077       }
1078
1079     switch (MATLAB_HDR.NameFlag)
1080     {
1081       case 0:
1082         size = ReadBlobXXXLong(image2);  /* Object name string size */
1083         size = 4 * (ssize_t) ((size + 3 + 1) / 4);
1084         (void) SeekBlob(image2, size, SEEK_CUR);
1085         break;
1086       case 1:
1087       case 2:
1088       case 3:
1089       case 4:
1090         (void) ReadBlob(image2, 4, (unsigned char *) &size); /* Object name string */
1091         break;
1092       default:
1093         goto MATLAB_KO;
1094     }
1095
1096     CellType = ReadBlobXXXLong(image2);    /* Additional object type */
1097     if (logging)
1098       (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1099         "MATLAB_HDR.CellType: %.20g",(double) CellType);
1100
1101     (void) ReadBlob(image2, 4, (unsigned char *) &size);     /* data size */
1102
1103     NEXT_FRAME:
1104     switch (CellType)
1105     {
1106       case miINT8:
1107       case miUINT8:
1108         sample_size = 8;
1109         if(MATLAB_HDR.StructureFlag & FLAG_LOGICAL)
1110           image->depth = 1;
1111         else
1112           image->depth = 8;         /* Byte type cell */
1113         ldblk = (ssize_t) MATLAB_HDR.SizeX;
1114         break;
1115       case miINT16:
1116       case miUINT16:
1117         sample_size = 16;
1118         image->depth = 16;        /* Word type cell */
1119         ldblk = (ssize_t) (2 * MATLAB_HDR.SizeX);
1120         break;
1121       case miINT32:
1122       case miUINT32:
1123         sample_size = 32;
1124         image->depth = 32;        /* Dword type cell */
1125         ldblk = (ssize_t) (4 * MATLAB_HDR.SizeX);
1126         break;
1127       case miINT64:
1128       case miUINT64:
1129         sample_size = 64;
1130         image->depth = 64;        /* Qword type cell */
1131         ldblk = (ssize_t) (8 * MATLAB_HDR.SizeX);
1132         break;
1133       case miSINGLE:
1134         sample_size = 32;
1135         image->depth = 32;        /* double type cell */
1136         (void) SetImageOption(clone_info,"quantum:format","floating-point");
1137         if (MATLAB_HDR.StructureFlag & FLAG_COMPLEX)
1138   {              /* complex float type cell */
1139   }
1140         ldblk = (ssize_t) (4 * MATLAB_HDR.SizeX);
1141         break;
1142       case miDOUBLE:
1143         sample_size = 64;
1144         image->depth = 64;        /* double type cell */
1145         (void) SetImageOption(clone_info,"quantum:format","floating-point");
1146 DisableMSCWarning(4127)
1147         if (sizeof(double) != 8)
1148 RestoreMSCWarning
1149           ThrowReaderException(CoderError, "IncompatibleSizeOfDouble");
1150         if (MATLAB_HDR.StructureFlag & FLAG_COMPLEX)
1151   {                         /* complex double type cell */
1152   }
1153         ldblk = (ssize_t) (8 * MATLAB_HDR.SizeX);
1154         break;
1155       default:
1156         if ((image != image2) && (image2 != (Image *) NULL))
1157           image2=DestroyImage(image2);
1158         if (clone_info)
1159           clone_info=DestroyImageInfo(clone_info);
1160         ThrowReaderException(CoderError, "UnsupportedCellTypeInTheMatrix");
1161     }
1162     (void) sample_size;
1163     image->columns = MATLAB_HDR.SizeX;
1164     image->rows = MATLAB_HDR.SizeY;
1165     one=1;
1166     image->colors = one << image->depth;
1167     if (image->columns == 0 || image->rows == 0)
1168       goto MATLAB_KO;
1169     if((unsigned long)ldblk*MATLAB_HDR.SizeY > MATLAB_HDR.ObjectSize)
1170       goto MATLAB_KO;
1171     /* Image is gray when no complex flag is set and 2D Matrix */
1172     if ((MATLAB_HDR.DimFlag == 8) &&
1173         ((MATLAB_HDR.StructureFlag & FLAG_COMPLEX) == 0))
1174       {
1175         image->type=GrayscaleType;
1176         SetImageColorspace(image,GRAYColorspace,exception);
1177       }
1178
1179
1180     /*
1181       If ping is true, then only set image size and colors without
1182       reading any image data.
1183     */
1184     if (image_info->ping)
1185     {
1186       size_t temp = image->columns;
1187       image->columns = image->rows;
1188       image->rows = temp;
1189       goto done_reading; /* !!!!!! BAD  !!!! */
1190     }
1191     status=SetImageExtent(image,image->columns,image->rows,exception);
1192     if (status == MagickFalse)
1193       {
1194         if ((image != image2) && (image2 != (Image *) NULL))
1195           image2=DestroyImage(image2);
1196         return(DestroyImageList(image));
1197       }
1198     quantum_info=AcquireQuantumInfo(clone_info,image);
1199     if (quantum_info == (QuantumInfo *) NULL)
1200       ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
1201
1202   /* ----- Load raster data ----- */
1203     BImgBuff = (unsigned char *) AcquireQuantumMemory((size_t) (ldblk),sizeof(double));    /* Ldblk was set in the check phase */
1204     if (BImgBuff == NULL)
1205       ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
1206     (void) ResetMagickMemory(BImgBuff,0,ldblk*sizeof(double));
1207
1208     MinVal = 0;
1209     MaxVal = 0;
1210     if (CellType==miDOUBLE || CellType==miSINGLE)        /* Find Min and Max Values for floats */
1211     {
1212       CalcMinMax(image2, image_info->endian,  MATLAB_HDR.SizeX, MATLAB_HDR.SizeY, CellType, ldblk, BImgBuff, &quantum_info->minimum, &quantum_info->maximum);
1213     }
1214
1215     /* Main loop for reading all scanlines */
1216     if(z==1) z=0; /* read grey scanlines */
1217     /* else read color scanlines */
1218     do
1219     {
1220       for (i = 0; i < (ssize_t) MATLAB_HDR.SizeY; i++)
1221       {
1222         q=GetAuthenticPixels(image,0,MATLAB_HDR.SizeY-i-1,image->columns,1,exception);
1223         if (q == (Quantum *) NULL)
1224   {
1225     if (logging) (void)LogMagickEvent(CoderEvent,GetMagickModule(),
1226               "  MAT set image pixels returns unexpected NULL on a row %u.", (unsigned)(MATLAB_HDR.SizeY-i-1));
1227     goto done_reading;    /* Skip image rotation, when cannot set image pixels    */
1228   }
1229         if(ReadBlob(image2,ldblk,(unsigned char *)BImgBuff) != (ssize_t) ldblk)
1230   {
1231     if (logging) (void)LogMagickEvent(CoderEvent,GetMagickModule(),
1232              "  MAT cannot read scanrow %u from a file.", (unsigned)(MATLAB_HDR.SizeY-i-1));
1233     goto ExitLoop;
1234   }
1235         if((CellType==miINT8 || CellType==miUINT8) && (MATLAB_HDR.StructureFlag & FLAG_LOGICAL))
1236         {
1237           FixLogical((unsigned char *)BImgBuff,ldblk);
1238           if(ImportQuantumPixels(image,(CacheView *) NULL,quantum_info,z2qtype[z],BImgBuff,exception) <= 0)
1239     {
1240 ImportQuantumPixelsFailed:
1241       if (logging) (void)LogMagickEvent(CoderEvent,GetMagickModule(),
1242               "  MAT failed to ImportQuantumPixels for a row %u", (unsigned)(MATLAB_HDR.SizeY-i-1));
1243       break;
1244     }
1245         }
1246         else
1247         {
1248           if(ImportQuantumPixels(image,(CacheView *) NULL,quantum_info,z2qtype[z],BImgBuff,exception) <= 0)
1249       goto ImportQuantumPixelsFailed;
1250
1251
1252           if (z<=1 &&       /* fix only during a last pass z==0 || z==1 */
1253           (CellType==miINT8 || CellType==miINT16 || CellType==miINT32 || CellType==miINT64))
1254       FixSignedValues(image,q,MATLAB_HDR.SizeX);
1255         }
1256
1257         if (!SyncAuthenticPixels(image,exception))
1258   {
1259     if (logging) (void)LogMagickEvent(CoderEvent,GetMagickModule(),
1260             "  MAT failed to sync image pixels for a row %u", (unsigned)(MATLAB_HDR.SizeY-i-1));
1261     goto ExitLoop;
1262   }
1263       }
1264     } while(z-- >= 2);
1265 ExitLoop:
1266
1267
1268     /* Read complex part of numbers here */
1269     if (MATLAB_HDR.StructureFlag & FLAG_COMPLEX)
1270     {        /* Find Min and Max Values for complex parts of floats */
1271       CellType = ReadBlobXXXLong(image2);    /* Additional object type */
1272       i = ReadBlobXXXLong(image2);           /* size of a complex part - toss away*/
1273
1274       if (CellType==miDOUBLE || CellType==miSINGLE)
1275       {
1276         CalcMinMax(image2,  image_info->endian, MATLAB_HDR.SizeX, MATLAB_HDR.SizeY, CellType, ldblk, BImgBuff, &MinVal, &MaxVal);
1277       }
1278
1279       if (CellType==miDOUBLE)
1280         for (i = 0; i < (ssize_t) MATLAB_HDR.SizeY; i++)
1281   {
1282           ReadBlobDoublesXXX(image2, ldblk, (double *)BImgBuff);
1283           InsertComplexDoubleRow(image, (double *)BImgBuff, i, MinVal, MaxVal,
1284             exception);
1285   }
1286
1287       if (CellType==miSINGLE)
1288         for (i = 0; i < (ssize_t) MATLAB_HDR.SizeY; i++)
1289   {
1290           ReadBlobFloatsXXX(image2, ldblk, (float *)BImgBuff);
1291           InsertComplexFloatRow(image,(float *)BImgBuff,i,MinVal,MaxVal,
1292             exception);
1293   }
1294     }
1295
1296       /* Image is gray when no complex flag is set and 2D Matrix AGAIN!!! */
1297     if ((MATLAB_HDR.DimFlag == 8) &&
1298         ((MATLAB_HDR.StructureFlag & FLAG_COMPLEX) == 0))
1299       image->type=GrayscaleType;
1300     if (image->depth == 1)
1301       image->type=BilevelType;
1302
1303     if(image2==image)
1304         image2 = NULL;    /* Remove shadow copy to an image before rotation. */
1305
1306       /*  Rotate image. */
1307     rotated_image = RotateImage(image, 90.0, exception);
1308     if (rotated_image != (Image *) NULL)
1309     {
1310         /* Remove page offsets added by RotateImage */
1311       rotated_image->page.x=0;
1312       rotated_image->page.y=0;
1313
1314       blob = rotated_image->blob;
1315       rotated_image->blob = image->blob;
1316       rotated_image->colors = image->colors;
1317       image->blob = blob;
1318       AppendImageToList(&image,rotated_image);
1319       DeleteImageFromList(&image);
1320     }
1321
1322 done_reading:
1323
1324     if(image2!=NULL)
1325       if(image2!=image)
1326       {
1327         DeleteImageFromList(&image2);
1328   if(clone_info)
1329   {
1330           if(clone_info->file)
1331     {
1332             fclose(clone_info->file);
1333             clone_info->file = NULL;
1334             (void) remove_utf8(clone_info->filename);
1335     }
1336         }
1337       }
1338
1339       /* Allocate next image structure. */
1340     AcquireNextImage(image_info,image,exception);
1341     if (image->next == (Image *) NULL) break;
1342     image=SyncNextImageInList(image);
1343     image->columns=image->rows=0;
1344     image->colors=0;
1345
1346       /* row scan buffer is no longer needed */
1347     RelinquishMagickMemory(BImgBuff);
1348     BImgBuff = NULL;
1349     if (quantum_info != (QuantumInfo *) NULL)
1350       quantum_info=DestroyQuantumInfo(quantum_info);
1351
1352     if(--Frames>0)
1353     {
1354       z = z2;
1355       if(image2==NULL) image2 = image;
1356       goto NEXT_FRAME;
1357     }
1358     if ((image2!=NULL) && (image2!=image))   /* Does shadow temporary decompressed image exist? */
1359       {
1360 /*  CloseBlob(image2); */
1361         DeleteImageFromList(&image2);
1362         if(clone_info)
1363         {
1364           if(clone_info->file)
1365           {
1366             fclose(clone_info->file);
1367             clone_info->file = NULL;
1368             (void) remove_utf8(clone_info->filename);
1369           }
1370         }
1371         }
1372
1373     if (clone_info)
1374       clone_info=DestroyImageInfo(clone_info);
1375   }
1376
1377   RelinquishMagickMemory(BImgBuff);
1378   if (quantum_info != (QuantumInfo *) NULL)
1379     quantum_info=DestroyQuantumInfo(quantum_info);
1380 END_OF_READING:
1381   CloseBlob(image);
1382
1383
1384   {
1385     Image *p;
1386     ssize_t scene=0;
1387
1388     /*
1389       Rewind list, removing any empty images while rewinding.
1390     */
1391     p=image;
1392     image=NULL;
1393     while (p != (Image *) NULL)
1394       {
1395         Image *tmp=p;
1396         if ((p->rows == 0) || (p->columns == 0)) {
1397           p=p->previous;
1398           if (tmp == image2)
1399             image2=(Image *) NULL;
1400           DeleteImageFromList(&tmp);
1401         } else {
1402           image=p;
1403           p=p->previous;
1404         }
1405       }
1406
1407     /*
1408       Fix scene numbers
1409     */
1410     for (p=image; p != (Image *) NULL; p=p->next)
1411       p->scene=scene++;
1412   }
1413
1414   if(clone_info != NULL)  /* cleanup garbage file from compression */
1415   {
1416     if(clone_info->file)
1417     {
1418       fclose(clone_info->file);
1419       clone_info->file = NULL;
1420       (void) remove_utf8(clone_info->filename);
1421     }
1422     DestroyImageInfo(clone_info);
1423     clone_info = NULL;
1424   }
1425   if (logging) (void)LogMagickEvent(CoderEvent,GetMagickModule(),"return");
1426   if ((image != image2) && (image2 != (Image *) NULL))
1427     image2=DestroyImage(image2);
1428   if (image == (Image *) NULL)
1429     ThrowReaderException(CorruptImageError,"ImproperImageHeader")
1430   return(image);
1431 }
1432 \f
1433 /*
1434 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1435 %                                                                             %
1436 %                                                                             %
1437 %                                                                             %
1438 %   R e g i s t e r M A T I m a g e                                           %
1439 %                                                                             %
1440 %                                                                             %
1441 %                                                                             %
1442 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1443 %
1444 %  Method RegisterMATImage adds attributes for the MAT image format to
1445 %  the list of supported formats.  The attributes include the image format
1446 %  tag, a method to read and/or write the format, whether the format
1447 %  supports the saving of more than one frame to the same file or blob,
1448 %  whether the format supports native in-memory I/O, and a brief
1449 %  description of the format.
1450 %
1451 %  The format of the RegisterMATImage method is:
1452 %
1453 %      size_t RegisterMATImage(void)
1454 %
1455 */
1456 ModuleExport size_t RegisterMATImage(void)
1457 {
1458   MagickInfo
1459     *entry;
1460
1461   entry=AcquireMagickInfo("MAT","MAT","MATLAB level 5 image format");
1462   entry->decoder=(DecodeImageHandler *) ReadMATImage;
1463   entry->encoder=(EncodeImageHandler *) WriteMATImage;
1464   entry->flags^=CoderBlobSupportFlag;
1465   entry->flags|=CoderDecoderSeekableStreamFlag;
1466   (void) RegisterMagickInfo(entry);
1467   return(MagickImageCoderSignature);
1468 }
1469 \f
1470 /*
1471 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1472 %                                                                             %
1473 %                                                                             %
1474 %                                                                             %
1475 %   U n r e g i s t e r M A T I m a g e                                       %
1476 %                                                                             %
1477 %                                                                             %
1478 %                                                                             %
1479 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1480 %
1481 %  Method UnregisterMATImage removes format registrations made by the
1482 %  MAT module from the list of supported formats.
1483 %
1484 %  The format of the UnregisterMATImage method is:
1485 %
1486 %      UnregisterMATImage(void)
1487 %
1488 */
1489 ModuleExport void UnregisterMATImage(void)
1490 {
1491   (void) UnregisterMagickInfo("MAT");
1492 }
1493 \f
1494 /*
1495 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1496 %                                                                             %
1497 %                                                                             %
1498 %                                                                             %
1499 %   W r i t e M A T L A B I m a g e                                           %
1500 %                                                                             %
1501 %                                                                             %
1502 %                                                                             %
1503 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1504 %
1505 %  Function WriteMATImage writes an Matlab matrix to a file.
1506 %
1507 %  The format of the WriteMATImage method is:
1508 %
1509 %      MagickBooleanType WriteMATImage(const ImageInfo *image_info,
1510 %        Image *image,ExceptionInfo *exception)
1511 %
1512 %  A description of each parameter follows.
1513 %
1514 %    o image_info: Specifies a pointer to a ImageInfo structure.
1515 %
1516 %    o image:  A pointer to an Image structure.
1517 %
1518 %    o exception: return any errors or warnings in this structure.
1519 %
1520 */
1521 static MagickBooleanType WriteMATImage(const ImageInfo *image_info,Image *image,
1522   ExceptionInfo *exception)
1523 {
1524   char
1525     MATLAB_HDR[0x80];
1526
1527   MagickBooleanType
1528     status;
1529
1530   MagickOffsetType
1531     scene;
1532
1533   struct tm
1534     local_time;
1535
1536   time_t
1537     current_time;
1538
1539   /*
1540     Open output image file.
1541   */
1542   assert(image_info != (const ImageInfo *) NULL);
1543   assert(image_info->signature == MagickCoreSignature);
1544   assert(image != (Image *) NULL);
1545   assert(image->signature == MagickCoreSignature);
1546   (void) LogMagickEvent(CoderEvent,GetMagickModule(),"enter MAT");
1547   assert(exception != (ExceptionInfo *) NULL);
1548   assert(exception->signature == MagickCoreSignature);
1549   status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
1550   if (status == MagickFalse)
1551     return(MagickFalse);
1552   image->depth=8;
1553
1554   current_time=time((time_t *) NULL);
1555 #if defined(MAGICKCORE_HAVE_LOCALTIME_R)
1556   (void) localtime_r(&current_time,&local_time);
1557 #else
1558   (void) memcpy(&local_time,localtime(&current_time),sizeof(local_time));
1559 #endif
1560   (void) memset(MATLAB_HDR,' ',MagickMin(sizeof(MATLAB_HDR),124));
1561   FormatLocaleString(MATLAB_HDR,sizeof(MATLAB_HDR),
1562     "MATLAB 5.0 MAT-file, Platform: %s, Created on: %s %s %2d %2d:%2d:%2d %d",
1563     OsDesc,DayOfWTab[local_time.tm_wday],MonthsTab[local_time.tm_mon],
1564     local_time.tm_mday,local_time.tm_hour,local_time.tm_min,
1565     local_time.tm_sec,local_time.tm_year+1900);
1566   MATLAB_HDR[0x7C]=0;
1567   MATLAB_HDR[0x7D]=1;
1568   MATLAB_HDR[0x7E]='I';
1569   MATLAB_HDR[0x7F]='M';
1570   (void) WriteBlob(image,sizeof(MATLAB_HDR),(unsigned char *) MATLAB_HDR);
1571   scene=0;
1572   do
1573   {
1574     char
1575       padding;
1576
1577     MagickBooleanType
1578       is_gray;
1579
1580     QuantumInfo
1581       *quantum_info;
1582
1583     size_t
1584       data_size;
1585
1586     unsigned char
1587       *pixels;
1588
1589     unsigned int
1590       z;
1591
1592     (void) TransformImageColorspace(image,sRGBColorspace,exception);
1593     is_gray=SetImageGray(image,exception);
1594     z=(is_gray != MagickFalse) ? 0 : 3;
1595
1596     /*
1597       Store MAT header.
1598     */
1599     data_size = image->rows * image->columns;
1600     if (is_gray == MagickFalse)
1601       data_size*=3;
1602     padding=((unsigned char)(data_size-1) & 0x7) ^ 0x7;
1603
1604     (void) WriteBlobLSBLong(image,miMATRIX);
1605     (void) WriteBlobLSBLong(image,(unsigned int) data_size+padding+
1606       ((is_gray != MagickFalse) ? 48 : 56));
1607     (void) WriteBlobLSBLong(image,0x6); /* 0x88 */
1608     (void) WriteBlobLSBLong(image,0x8); /* 0x8C */
1609     (void) WriteBlobLSBLong(image,0x6); /* 0x90 */
1610     (void) WriteBlobLSBLong(image,0);
1611     (void) WriteBlobLSBLong(image,0x5); /* 0x98 */
1612     (void) WriteBlobLSBLong(image,(is_gray != MagickFalse) ? 0x8 : 0xC); /* 0x9C - DimFlag */
1613     (void) WriteBlobLSBLong(image,(unsigned int) image->rows);    /* x: 0xA0 */
1614     (void) WriteBlobLSBLong(image,(unsigned int) image->columns); /* y: 0xA4 */
1615     if (is_gray == MagickFalse)
1616       {
1617         (void) WriteBlobLSBLong(image,3); /* z: 0xA8 */
1618         (void) WriteBlobLSBLong(image,0);
1619       }
1620     (void) WriteBlobLSBShort(image,1);  /* 0xB0 */
1621     (void) WriteBlobLSBShort(image,1);  /* 0xB2 */
1622     (void) WriteBlobLSBLong(image,'M'); /* 0xB4 */
1623     (void) WriteBlobLSBLong(image,0x2); /* 0xB8 */
1624     (void) WriteBlobLSBLong(image,(unsigned int) data_size); /* 0xBC */
1625
1626     /*
1627       Store image data.
1628     */
1629     quantum_info=AcquireQuantumInfo(image_info,image);
1630     if (quantum_info == (QuantumInfo *) NULL)
1631       ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
1632     pixels=(unsigned char *) GetQuantumPixels(quantum_info);
1633     do
1634     {
1635       const Quantum
1636         *p;
1637
1638       ssize_t
1639         y;
1640
1641       for (y=0; y < (ssize_t)image->columns; y++)
1642       {
1643         p=GetVirtualPixels(image,y,0,1,image->rows,exception);
1644         if (p == (const Quantum *) NULL)
1645           break;
1646         (void) ExportQuantumPixels(image,(CacheView *) NULL,quantum_info,
1647           z2qtype[z],pixels,exception);
1648         (void) WriteBlob(image,image->rows,pixels);
1649       }
1650       if (SyncAuthenticPixels(image,exception) == MagickFalse)
1651         break;
1652     } while (z-- >= 2);
1653     while (padding-- > 0)
1654       (void) WriteBlobByte(image,0);
1655     quantum_info=DestroyQuantumInfo(quantum_info);
1656     if (GetNextImageInList(image) == (Image *) NULL)
1657       break;
1658     image=SyncNextImageInList(image);
1659     status=SetImageProgress(image,SaveImagesTag,scene++,
1660       GetImageListLength(image));
1661     if (status == MagickFalse)
1662       break;
1663   } while (image_info->adjoin != MagickFalse);
1664   (void) CloseBlob(image);
1665   return(status);
1666 }