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     if (image_info->ping != MagickFalse)
 690       {
 691         Swap(image->columns,image->rows);
 692         if(HDR.imagf==1) ldblk *= 2;
 693         SeekBlob(image, HDR.nCols*ldblk, SEEK_CUR);
 694         goto skip_reading_current;
 695       }
 696     status=SetImageExtent(image,image->columns,image->rows,exception);
 697     if (status == MagickFalse)
 698       return((Image *) NULL);
 699     (void) SetImageBackgroundColor(image,exception);
 700     (void) SetImageColorspace(image,GRAYColorspace,exception);
 701     quantum_info=AcquireQuantumInfo(image_info,image);
 702     if (quantum_info == (QuantumInfo *) NULL)
 703       return((Image *) NULL);
 704     switch(HDR.Type[1])
 705     {
 706       case 0:
 707         format_type=FloatingPointQuantumFormat;
 708         depth=64;
 709         break;
 710       case 1:
 711         format_type=FloatingPointQuantumFormat;
 712         depth=32;
 713         break;
 714       case 2:
 715         format_type=UnsignedQuantumFormat;
 716         depth=16;
 717         break;
 718       case 3:
 719         format_type=SignedQuantumFormat;
 720         depth=16;
 721         break;
 722       case 4:
 723         format_type=UnsignedQuantumFormat;
 724         depth=8;
 725         break;
 726       default:
 727         format_type=UnsignedQuantumFormat;
 728         depth=8;
 729         break;
 730     }
 731     image->depth=depth;
 732     if (HDR.Type[0] != 0)
 733       SetQuantumEndian(image,quantum_info,MSBEndian);
 734     status=SetQuantumFormat(image,quantum_info,format_type);
 735     status=SetQuantumDepth(image,quantum_info,depth);
 736     status=SetQuantumEndian(image,quantum_info,endian);
 737     SetQuantumScale(quantum_info,1.0);
 738     pixels=(unsigned char *) GetQuantumPixels(quantum_info);
 739     for (y=0; y < (ssize_t) image->rows; y++)
 740     {
 741       register Quantum
 742         *magick_restrict q;
 743
 744       count=ReadBlob(image,depth/8*image->columns,(char *) pixels);
 745       if (count == -1)
 746         break;
 747       q=QueueAuthenticPixels(image,0,image->rows-y-1,image->columns,1,
 748         exception);
 749       if (q == (Quantum *) NULL)
 750         break;
 751       (void) ImportQuantumPixels(image,(CacheView *) NULL,quantum_info,
 752         GrayQuantum,pixels,exception);
 753       if ((HDR.Type[1] == 2) || (HDR.Type[1] == 3))
 754         FixSignedValues(image,q,(int) image->columns);
 755       if (SyncAuthenticPixels(image,exception) == MagickFalse)
 756         break;
 757       if (image->previous == (Image *) NULL)
 758         {
 759           status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
 760             image->rows);
 761           if (status == MagickFalse)
 762             break;
 763         }
 764     }
 765     if (HDR.imagf == 1)
 766       for (y=0; y < (ssize_t) image->rows; y++)
 767       {
 768         /*
 769           Read complex pixels.
 770         */
 771         count=ReadBlob(image,depth/8*image->columns,(char *) pixels);
 772         if (count == -1)
 773           break;
 774         if (HDR.Type[1] == 0)
 775           InsertComplexDoubleRow(image,(double *) pixels,y,0,0,exception);
 776         else
 777           InsertComplexFloatRow(image,(float *) pixels,y,0,0,exception);
 778       }
 779     if (quantum_info != (QuantumInfo *) NULL)
 780       quantum_info=DestroyQuantumInfo(quantum_info);
 781     if (EOFBlob(image) != MagickFalse)
 782       {
 783         ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
 784           image->filename);
 785         break;
 786       }
 787     rotated_image=RotateImage(image,90.0,exception);
 788     if (rotated_image != (Image *) NULL)
 789       {
 790         rotated_image->page.x=0;
 791         rotated_image->page.y=0;
 792         rotated_image->colors = image->colors;
 793         DestroyBlob(rotated_image);
 794         rotated_image->blob=ReferenceBlob(image->blob);
 795         AppendImageToList(&image,rotated_image);
 796         DeleteImageFromList(&image);
 797       }
 798     /*
 799       Proceed to next image.
 800     */
 801     if (image_info->number_scenes != 0)
 802       if (image->scene >= (image_info->scene+image_info->number_scenes-1))
 803         break;
 804     /*
 805       Allocate next image structure.
 806     */
 807 skip_reading_current:
 808     AcquireNextImage(image_info,image,exception);
 809     if (GetNextImageInList(image) == (Image *) NULL)
 810       {
 811         image=DestroyImageList(image);
 812         return((Image *) NULL);
 813       }
 814     image=SyncNextImageInList(image);
 815     status=SetImageProgress(image,LoadImagesTag,TellBlob(image),
 816       GetBlobSize(image));
 817     if (status == MagickFalse)
 818       break;
 819   }
 820   (void) CloseBlob(image);
 821   return(GetFirstImageInList(image));
 822 }
 823 \f
 824 /*
 825 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 826 %                                                                             %
 827 %                                                                             %
 828 %                                                                             %
 829 %   R e a d M A T L A B i m a g e                                             %
 830 %                                                                             %
 831 %                                                                             %
 832 %                                                                             %
 833 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 834 %
 835 %  ReadMATImage() reads an MAT X image file and returns it.  It
 836 %  allocates the memory necessary for the new Image structure and returns a
 837 %  pointer to the new image.
 838 %
 839 %  The format of the ReadMATImage method is:
 840 %
 841 %      Image *ReadMATImage(const ImageInfo *image_info,ExceptionInfo *exception)
 842 %
 843 %  A description of each parameter follows:
 844 %
 845 %    o image:  Method ReadMATImage returns a pointer to the image after
 846 %      reading. A null image is returned if there is a memory shortage or if
 847 %      the image cannot be read.
 848 %
 849 %    o image_info: Specifies a pointer to a ImageInfo structure.
 850 %
 851 %    o exception: return any errors or warnings in this structure.
 852 %
 853 */
 854 static Image *ReadMATImage(const ImageInfo *image_info,ExceptionInfo *exception)
 855 {
 856   Image *image, *image2=NULL,
 857    *rotated_image;
 858   register Quantum *q;
 859
 860   unsigned int status;
 861   MATHeader MATLAB_HDR;
 862   size_t size;
 863   size_t CellType;
 864   QuantumInfo *quantum_info;
 865   ImageInfo *clone_info;
 866   int i;
 867   ssize_t ldblk;
 868   unsigned char *BImgBuff = NULL;
 869   double MinVal, MaxVal;
 870   unsigned z, z2;
 871   unsigned Frames;
 872   int logging;
 873   int sample_size;
 874   MagickOffsetType filepos=0x80;
 875   BlobInfo *blob;
 876
 877   unsigned int (*ReadBlobXXXLong)(Image *image);
 878   unsigned short (*ReadBlobXXXShort)(Image *image);
 879   void (*ReadBlobDoublesXXX)(Image * image, size_t len, double *data);
 880   void (*ReadBlobFloatsXXX)(Image * image, size_t len, float *data);
 881
 882
 883   assert(image_info != (const ImageInfo *) NULL);
 884   assert(image_info->signature == MagickCoreSignature);
 885   assert(exception != (ExceptionInfo *) NULL);
 886   assert(exception->signature == MagickCoreSignature);
 887   logging = LogMagickEvent(CoderEvent,GetMagickModule(),"enter");
 888
 889   /*
 890      Open image file.
 891    */
 892   image = AcquireImage(image_info,exception);
 893   image2 = (Image *) NULL;
 894
 895   status = OpenBlob(image_info, image, ReadBinaryBlobMode, exception);
 896   if (status == MagickFalse)
 897     {
 898       image=DestroyImageList(image);
 899       return((Image *) NULL);
 900     }
 901   /*
 902      Read MATLAB image.
 903    */
 904   quantum_info=(QuantumInfo *) NULL;
 905   clone_info=(ImageInfo *) NULL;
 906   if (ReadBlob(image,124,(unsigned char *) &MATLAB_HDR.identific) != 124)
 907     ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 908   if (strncmp(MATLAB_HDR.identific,"MATLAB",6) != 0)
 909     {
 910       image2=ReadMATImageV4(image_info,image,exception);
 911       if (image2  == NULL)
 912         goto MATLAB_KO;
 913       image=image2;
 914       goto END_OF_READING;
 915     }
 916   MATLAB_HDR.Version = ReadBlobLSBShort(image);
 917   if(ReadBlob(image,2,(unsigned char *) &MATLAB_HDR.EndianIndicator) != 2)
 918     ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 919
 920   if (logging)
 921     (void) LogMagickEvent(CoderEvent,GetMagickModule(),"  Endian %c%c",
 922       MATLAB_HDR.EndianIndicator[0],MATLAB_HDR.EndianIndicator[1]);
 923   if (!strncmp(MATLAB_HDR.EndianIndicator, "IM", 2))
 924   {
 925     ReadBlobXXXLong = ReadBlobLSBLong;
 926     ReadBlobXXXShort = ReadBlobLSBShort;
 927     ReadBlobDoublesXXX = ReadBlobDoublesLSB;
 928     ReadBlobFloatsXXX = ReadBlobFloatsLSB;
 929     image->endian = LSBEndian;
 930   }
 931   else if (!strncmp(MATLAB_HDR.EndianIndicator, "MI", 2))
 932   {
 933     ReadBlobXXXLong = ReadBlobMSBLong;
 934     ReadBlobXXXShort = ReadBlobMSBShort;
 935     ReadBlobDoublesXXX = ReadBlobDoublesMSB;
 936     ReadBlobFloatsXXX = ReadBlobFloatsMSB;
 937     image->endian = MSBEndian;
 938   }
 939   else
 940     goto MATLAB_KO;    /* unsupported endian */
 941
 942   if (strncmp(MATLAB_HDR.identific, "MATLAB", 6))
 943     {
 944 MATLAB_KO:
 945       if ((image != image2) && (image2 != (Image *) NULL))
 946         image2=DestroyImage(image2);
 947       if (clone_info != (ImageInfo *) NULL)
 948         clone_info=DestroyImageInfo(clone_info);
 949       ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 950     }
 951
 952   filepos = TellBlob(image);
 953   while(!EOFBlob(image)) /* object parser loop */
 954   {
 955     Frames = 1;
 956     (void) SeekBlob(image,filepos,SEEK_SET);
 957     /* printf("pos=%X\n",TellBlob(image)); */
 958
 959     MATLAB_HDR.DataType = ReadBlobXXXLong(image);
 960     if(EOFBlob(image)) break;
 961     MATLAB_HDR.ObjectSize = ReadBlobXXXLong(image);
 962     if(EOFBlob(image)) break;
 963     if((MagickSizeType) (MATLAB_HDR.ObjectSize+filepos) > GetBlobSize(image))
 964       goto MATLAB_KO;
 965     filepos += MATLAB_HDR.ObjectSize + 4 + 4;
 966
 967     if (clone_info != (ImageInfo *) NULL)
 968       clone_info=DestroyImageInfo(clone_info);
 969     clone_info=CloneImageInfo(image_info);
 970     if ((image != image2) && (image2 != (Image *) NULL))
 971       image2=DestroyImage(image2);
 972     image2 = image;
 973 #if defined(MAGICKCORE_ZLIB_DELEGATE)
 974     if(MATLAB_HDR.DataType == miCOMPRESSED)
 975     {
 976       image2 = decompress_block(image,&MATLAB_HDR.ObjectSize,clone_info,exception);
 977       if(image2==NULL) continue;
 978       MATLAB_HDR.DataType = ReadBlobXXXLong(image2); /* replace compressed object type. */
 979     }
 980 #endif
 981
 982     if (MATLAB_HDR.DataType!=miMATRIX)
 983       {
 984         clone_info=DestroyImageInfo(clone_info);
 985         continue;  /* skip another objects. */
 986       }
 987
 988     MATLAB_HDR.unknown1 = ReadBlobXXXLong(image2);
 989     MATLAB_HDR.unknown2 = ReadBlobXXXLong(image2);
 990
 991     MATLAB_HDR.unknown5 = ReadBlobXXXLong(image2);
 992     MATLAB_HDR.StructureClass = MATLAB_HDR.unknown5 & 0xFF;
 993     MATLAB_HDR.StructureFlag = (MATLAB_HDR.unknown5>>8) & 0xFF;
 994
 995     MATLAB_HDR.unknown3 = ReadBlobXXXLong(image2);
 996     if(image!=image2)
 997       MATLAB_HDR.unknown4 = ReadBlobXXXLong(image2);  /* ??? don't understand why ?? */
 998     MATLAB_HDR.unknown4 = ReadBlobXXXLong(image2);
 999     MATLAB_HDR.DimFlag = ReadBlobXXXLong(image2);
1000     MATLAB_HDR.SizeX = ReadBlobXXXLong(image2);
1001     MATLAB_HDR.SizeY = ReadBlobXXXLong(image2);
1002
1003
1004     switch(MATLAB_HDR.DimFlag)
1005     {
1006       case  8: z2=z=1; break;      /* 2D matrix*/
1007       case 12: z2=z = ReadBlobXXXLong(image2);  /* 3D matrix RGB*/
1008            (void) ReadBlobXXXLong(image2);
1009          if(z!=3)
1010            {
1011              if (clone_info != (ImageInfo *) NULL)
1012                clone_info=DestroyImageInfo(clone_info);
1013              if ((image != image2) && (image2 != (Image *) NULL))
1014                image2=DestroyImage(image2);
1015              ThrowReaderException(CoderError,
1016                "MultidimensionalMatricesAreNotSupported");
1017            }
1018          break;
1019       case 16: z2=z = ReadBlobXXXLong(image2);  /* 4D matrix animation */
1020          if(z!=3 && z!=1)
1021            {
1022              if (clone_info != (ImageInfo *) NULL)
1023                clone_info=DestroyImageInfo(clone_info);
1024              if ((image != image2) && (image2 != (Image *) NULL))
1025                image2=DestroyImage(image2);
1026              ThrowReaderException(CoderError,
1027                "MultidimensionalMatricesAreNotSupported");
1028            }
1029          Frames = ReadBlobXXXLong(image2);
1030          if (Frames == 0)
1031            {
1032              if (clone_info != (ImageInfo *) NULL)
1033                clone_info=DestroyImageInfo(clone_info);
1034              if ((image != image2) && (image2 != (Image *) NULL))
1035                image2=DestroyImage(image2);
1036              ThrowReaderException(CorruptImageError,"ImproperImageHeader");
1037            }
1038          break;
1039       default:
1040         if (clone_info != (ImageInfo *) NULL)
1041           clone_info=DestroyImageInfo(clone_info);
1042         if ((image != image2) && (image2 != (Image *) NULL))
1043           image2=DestroyImage(image2);
1044         ThrowReaderException(CoderError, "MultidimensionalMatricesAreNotSupported");
1045     }
1046
1047     MATLAB_HDR.Flag1 = ReadBlobXXXShort(image2);
1048     MATLAB_HDR.NameFlag = ReadBlobXXXShort(image2);
1049
1050     if (logging) (void)LogMagickEvent(CoderEvent,GetMagickModule(),
1051           "MATLAB_HDR.StructureClass %d",MATLAB_HDR.StructureClass);
1052     if (MATLAB_HDR.StructureClass != mxCHAR_CLASS &&
1053         MATLAB_HDR.StructureClass != mxSINGLE_CLASS &&    /* float + complex float */
1054         MATLAB_HDR.StructureClass != mxDOUBLE_CLASS &&    /* double + complex double */
1055         MATLAB_HDR.StructureClass != mxINT8_CLASS &&
1056         MATLAB_HDR.StructureClass != mxUINT8_CLASS &&    /* uint8 + uint8 3D */
1057         MATLAB_HDR.StructureClass != mxINT16_CLASS &&
1058         MATLAB_HDR.StructureClass != mxUINT16_CLASS &&    /* uint16 + uint16 3D */
1059         MATLAB_HDR.StructureClass != mxINT32_CLASS &&
1060         MATLAB_HDR.StructureClass != mxUINT32_CLASS &&    /* uint32 + uint32 3D */
1061         MATLAB_HDR.StructureClass != mxINT64_CLASS &&
1062         MATLAB_HDR.StructureClass != mxUINT64_CLASS)    /* uint64 + uint64 3D */
1063       {
1064         if ((image2 != (Image*) NULL) && (image2 != (Image *) image))
1065           {
1066             CloseBlob(image2);
1067             DeleteImageFromList(&image2);
1068           }
1069         if (clone_info != (ImageInfo *) NULL)
1070           DestroyImageInfo(clone_info);
1071         ThrowReaderException(CoderError,"UnsupportedCellTypeInTheMatrix");
1072       }
1073
1074     switch (MATLAB_HDR.NameFlag)
1075     {
1076       case 0:
1077         size = ReadBlobXXXLong(image2);  /* Object name string size */
1078         size = 4 * (ssize_t) ((size + 3 + 1) / 4);
1079         (void) SeekBlob(image2, size, SEEK_CUR);
1080         break;
1081       case 1:
1082       case 2:
1083       case 3:
1084       case 4:
1085         (void) ReadBlob(image2, 4, (unsigned char *) &size); /* Object name string */
1086         break;
1087       default:
1088         goto MATLAB_KO;
1089     }
1090
1091     CellType = ReadBlobXXXLong(image2);    /* Additional object type */
1092     if (logging)
1093       (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1094         "MATLAB_HDR.CellType: %.20g",(double) CellType);
1095
1096     (void) ReadBlob(image2, 4, (unsigned char *) &size);     /* data size */
1097
1098     NEXT_FRAME:
1099     switch (CellType)
1100     {
1101       case miINT8:
1102       case miUINT8:
1103         sample_size = 8;
1104         if(MATLAB_HDR.StructureFlag & FLAG_LOGICAL)
1105           image->depth = 1;
1106         else
1107           image->depth = 8;         /* Byte type cell */
1108         ldblk = (ssize_t) MATLAB_HDR.SizeX;
1109         break;
1110       case miINT16:
1111       case miUINT16:
1112         sample_size = 16;
1113         image->depth = 16;        /* Word type cell */
1114         ldblk = (ssize_t) (2 * MATLAB_HDR.SizeX);
1115         break;
1116       case miINT32:
1117       case miUINT32:
1118         sample_size = 32;
1119         image->depth = 32;        /* Dword type cell */
1120         ldblk = (ssize_t) (4 * MATLAB_HDR.SizeX);
1121         break;
1122       case miINT64:
1123       case miUINT64:
1124         sample_size = 64;
1125         image->depth = 64;        /* Qword type cell */
1126         ldblk = (ssize_t) (8 * MATLAB_HDR.SizeX);
1127         break;
1128       case miSINGLE:
1129         sample_size = 32;
1130         image->depth = 32;        /* double type cell */
1131         (void) SetImageOption(clone_info,"quantum:format","floating-point");
1132         if (MATLAB_HDR.StructureFlag & FLAG_COMPLEX)
1133   {              /* complex float type cell */
1134   }
1135         ldblk = (ssize_t) (4 * MATLAB_HDR.SizeX);
1136         break;
1137       case miDOUBLE:
1138         sample_size = 64;
1139         image->depth = 64;        /* double type cell */
1140         (void) SetImageOption(clone_info,"quantum:format","floating-point");
1141 DisableMSCWarning(4127)
1142         if (sizeof(double) != 8)
1143 RestoreMSCWarning
1144           ThrowReaderException(CoderError, "IncompatibleSizeOfDouble");
1145         if (MATLAB_HDR.StructureFlag & FLAG_COMPLEX)
1146   {                         /* complex double type cell */
1147   }
1148         ldblk = (ssize_t) (8 * MATLAB_HDR.SizeX);
1149         break;
1150       default:
1151         if ((image != image2) && (image2 != (Image *) NULL))
1152           image2=DestroyImage(image2);
1153         if (clone_info)
1154           clone_info=DestroyImageInfo(clone_info);
1155         ThrowReaderException(CoderError, "UnsupportedCellTypeInTheMatrix");
1156     }
1157     (void) sample_size;
1158     image->columns = MATLAB_HDR.SizeX;
1159     image->rows = MATLAB_HDR.SizeY;
1160     image->colors = GetQuantumRange(image->depth);
1161     if (image->columns == 0 || image->rows == 0)
1162       goto MATLAB_KO;
1163     if((unsigned long)ldblk*MATLAB_HDR.SizeY > MATLAB_HDR.ObjectSize)
1164       goto MATLAB_KO;
1165     /* Image is gray when no complex flag is set and 2D Matrix */
1166     if ((MATLAB_HDR.DimFlag == 8) &&
1167         ((MATLAB_HDR.StructureFlag & FLAG_COMPLEX) == 0))
1168       {
1169         image->type=GrayscaleType;
1170         SetImageColorspace(image,GRAYColorspace,exception);
1171       }
1172
1173
1174     /*
1175       If ping is true, then only set image size and colors without
1176       reading any image data.
1177     */
1178     if (image_info->ping)
1179     {
1180       size_t temp = image->columns;
1181       image->columns = image->rows;
1182       image->rows = temp;
1183       goto done_reading; /* !!!!!! BAD  !!!! */
1184     }
1185     status=SetImageExtent(image,image->columns,image->rows,exception);
1186     if (status == MagickFalse)
1187       {
1188         if ((image != image2) && (image2 != (Image *) NULL))
1189           image2=DestroyImage(image2);
1190         return(DestroyImageList(image));
1191       }
1192     (void) SetImageBackgroundColor(image,exception);
1193     quantum_info=AcquireQuantumInfo(clone_info,image);
1194     if (quantum_info == (QuantumInfo *) NULL)
1195       ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
1196
1197   /* ----- Load raster data ----- */
1198     BImgBuff = (unsigned char *) AcquireQuantumMemory((size_t) (ldblk),sizeof(double));    /* Ldblk was set in the check phase */
1199     if (BImgBuff == NULL)
1200       ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
1201     (void) memset(BImgBuff,0,ldblk*sizeof(double));
1202
1203     MinVal = 0;
1204     MaxVal = 0;
1205     if (CellType==miDOUBLE || CellType==miSINGLE)        /* Find Min and Max Values for floats */
1206     {
1207       CalcMinMax(image2, image_info->endian,  MATLAB_HDR.SizeX, MATLAB_HDR.SizeY, CellType, ldblk, BImgBuff, &quantum_info->minimum, &quantum_info->maximum);
1208     }
1209
1210     /* Main loop for reading all scanlines */
1211     if(z==1) z=0; /* read grey scanlines */
1212     /* else read color scanlines */
1213     do
1214     {
1215       for (i = 0; i < (ssize_t) MATLAB_HDR.SizeY; i++)
1216       {
1217         q=GetAuthenticPixels(image,0,MATLAB_HDR.SizeY-i-1,image->columns,1,exception);
1218         if (q == (Quantum *) NULL)
1219   {
1220     if (logging) (void)LogMagickEvent(CoderEvent,GetMagickModule(),
1221               "  MAT set image pixels returns unexpected NULL on a row %u.", (unsigned)(MATLAB_HDR.SizeY-i-1));
1222     goto done_reading;    /* Skip image rotation, when cannot set image pixels    */
1223   }
1224         if(ReadBlob(image2,ldblk,(unsigned char *)BImgBuff) != (ssize_t) ldblk)
1225   {
1226     if (logging) (void)LogMagickEvent(CoderEvent,GetMagickModule(),
1227              "  MAT cannot read scanrow %u from a file.", (unsigned)(MATLAB_HDR.SizeY-i-1));
1228     goto ExitLoop;
1229   }
1230         if((CellType==miINT8 || CellType==miUINT8) && (MATLAB_HDR.StructureFlag & FLAG_LOGICAL))
1231         {
1232           FixLogical((unsigned char *)BImgBuff,ldblk);
1233           if(ImportQuantumPixels(image,(CacheView *) NULL,quantum_info,z2qtype[z],BImgBuff,exception) <= 0)
1234     {
1235 ImportQuantumPixelsFailed:
1236       if (logging) (void)LogMagickEvent(CoderEvent,GetMagickModule(),
1237               "  MAT failed to ImportQuantumPixels for a row %u", (unsigned)(MATLAB_HDR.SizeY-i-1));
1238       break;
1239     }
1240         }
1241         else
1242         {
1243           if(ImportQuantumPixels(image,(CacheView *) NULL,quantum_info,z2qtype[z],BImgBuff,exception) <= 0)
1244       goto ImportQuantumPixelsFailed;
1245
1246
1247           if (z<=1 &&       /* fix only during a last pass z==0 || z==1 */
1248           (CellType==miINT8 || CellType==miINT16 || CellType==miINT32 || CellType==miINT64))
1249       FixSignedValues(image,q,MATLAB_HDR.SizeX);
1250         }
1251
1252         if (!SyncAuthenticPixels(image,exception))
1253   {
1254     if (logging) (void)LogMagickEvent(CoderEvent,GetMagickModule(),
1255             "  MAT failed to sync image pixels for a row %u", (unsigned)(MATLAB_HDR.SizeY-i-1));
1256     goto ExitLoop;
1257   }
1258       }
1259     } while(z-- >= 2);
1260 ExitLoop:
1261
1262
1263     /* Read complex part of numbers here */
1264     if (MATLAB_HDR.StructureFlag & FLAG_COMPLEX)
1265     {        /* Find Min and Max Values for complex parts of floats */
1266       CellType = ReadBlobXXXLong(image2);    /* Additional object type */
1267       i = ReadBlobXXXLong(image2);           /* size of a complex part - toss away*/
1268
1269       if (CellType==miDOUBLE || CellType==miSINGLE)
1270       {
1271         CalcMinMax(image2,  image_info->endian, MATLAB_HDR.SizeX, MATLAB_HDR.SizeY, CellType, ldblk, BImgBuff, &MinVal, &MaxVal);
1272       }
1273
1274       if (CellType==miDOUBLE)
1275         for (i = 0; i < (ssize_t) MATLAB_HDR.SizeY; i++)
1276   {
1277           ReadBlobDoublesXXX(image2, ldblk, (double *)BImgBuff);
1278           InsertComplexDoubleRow(image, (double *)BImgBuff, i, MinVal, MaxVal,
1279             exception);
1280   }
1281
1282       if (CellType==miSINGLE)
1283         for (i = 0; i < (ssize_t) MATLAB_HDR.SizeY; i++)
1284   {
1285           ReadBlobFloatsXXX(image2, ldblk, (float *)BImgBuff);
1286           InsertComplexFloatRow(image,(float *)BImgBuff,i,MinVal,MaxVal,
1287             exception);
1288   }
1289     }
1290
1291       /* Image is gray when no complex flag is set and 2D Matrix AGAIN!!! */
1292     if ((MATLAB_HDR.DimFlag == 8) &&
1293         ((MATLAB_HDR.StructureFlag & FLAG_COMPLEX) == 0))
1294       image->type=GrayscaleType;
1295     if (image->depth == 1)
1296       image->type=BilevelType;
1297
1298     if(image2==image)
1299         image2 = NULL;    /* Remove shadow copy to an image before rotation. */
1300
1301       /*  Rotate image. */
1302     rotated_image = RotateImage(image, 90.0, exception);
1303     if (rotated_image != (Image *) NULL)
1304     {
1305         /* Remove page offsets added by RotateImage */
1306       rotated_image->page.x=0;
1307       rotated_image->page.y=0;
1308
1309       blob = rotated_image->blob;
1310       rotated_image->blob = image->blob;
1311       rotated_image->colors = image->colors;
1312       image->blob = blob;
1313       AppendImageToList(&image,rotated_image);
1314       DeleteImageFromList(&image);
1315     }
1316
1317 done_reading:
1318
1319     if(image2!=NULL)
1320       if(image2!=image)
1321       {
1322         DeleteImageFromList(&image2);
1323   if(clone_info)
1324   {
1325           if(clone_info->file)
1326     {
1327             fclose(clone_info->file);
1328             clone_info->file = NULL;
1329             (void) remove_utf8(clone_info->filename);
1330     }
1331         }
1332       }
1333
1334       /* Allocate next image structure. */
1335     AcquireNextImage(image_info,image,exception);
1336     if (image->next == (Image *) NULL) break;
1337     image=SyncNextImageInList(image);
1338     image->columns=image->rows=0;
1339     image->colors=0;
1340
1341       /* row scan buffer is no longer needed */
1342     RelinquishMagickMemory(BImgBuff);
1343     BImgBuff = NULL;
1344     if (quantum_info != (QuantumInfo *) NULL)
1345       quantum_info=DestroyQuantumInfo(quantum_info);
1346
1347     if(--Frames>0)
1348     {
1349       z = z2;
1350       if(image2==NULL) image2 = image;
1351       goto NEXT_FRAME;
1352     }
1353     if ((image2!=NULL) && (image2!=image))   /* Does shadow temporary decompressed image exist? */
1354       {
1355 /*  CloseBlob(image2); */
1356         DeleteImageFromList(&image2);
1357         if(clone_info)
1358         {
1359           if(clone_info->file)
1360           {
1361             fclose(clone_info->file);
1362             clone_info->file = NULL;
1363             (void) remove_utf8(clone_info->filename);
1364           }
1365         }
1366         }
1367
1368     if (clone_info)
1369       clone_info=DestroyImageInfo(clone_info);
1370   }
1371
1372   RelinquishMagickMemory(BImgBuff);
1373   if (quantum_info != (QuantumInfo *) NULL)
1374     quantum_info=DestroyQuantumInfo(quantum_info);
1375 END_OF_READING:
1376   CloseBlob(image);
1377
1378
1379   {
1380     Image *p;
1381     ssize_t scene=0;
1382
1383     /*
1384       Rewind list, removing any empty images while rewinding.
1385     */
1386     p=image;
1387     image=NULL;
1388     while (p != (Image *) NULL)
1389       {
1390         Image *tmp=p;
1391         if ((p->rows == 0) || (p->columns == 0)) {
1392           p=p->previous;
1393           if (tmp == image2)
1394             image2=(Image *) NULL;
1395           DeleteImageFromList(&tmp);
1396         } else {
1397           image=p;
1398           p=p->previous;
1399         }
1400       }
1401
1402     /*
1403       Fix scene numbers
1404     */
1405     for (p=image; p != (Image *) NULL; p=p->next)
1406       p->scene=scene++;
1407   }
1408
1409   if(clone_info != NULL)  /* cleanup garbage file from compression */
1410   {
1411     if(clone_info->file)
1412     {
1413       fclose(clone_info->file);
1414       clone_info->file = NULL;
1415       (void) remove_utf8(clone_info->filename);
1416     }
1417     DestroyImageInfo(clone_info);
1418     clone_info = NULL;
1419   }
1420   if (logging) (void)LogMagickEvent(CoderEvent,GetMagickModule(),"return");
1421   if ((image != image2) && (image2 != (Image *) NULL))
1422     image2=DestroyImage(image2);
1423   if (image == (Image *) NULL)
1424     ThrowReaderException(CorruptImageError,"ImproperImageHeader")
1425   return(image);
1426 }
1427 \f
1428 /*
1429 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1430 %                                                                             %
1431 %                                                                             %
1432 %                                                                             %
1433 %   R e g i s t e r M A T I m a g e                                           %
1434 %                                                                             %
1435 %                                                                             %
1436 %                                                                             %
1437 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1438 %
1439 %  Method RegisterMATImage adds attributes for the MAT image format to
1440 %  the list of supported formats.  The attributes include the image format
1441 %  tag, a method to read and/or write the format, whether the format
1442 %  supports the saving of more than one frame to the same file or blob,
1443 %  whether the format supports native in-memory I/O, and a brief
1444 %  description of the format.
1445 %
1446 %  The format of the RegisterMATImage method is:
1447 %
1448 %      size_t RegisterMATImage(void)
1449 %
1450 */
1451 ModuleExport size_t RegisterMATImage(void)
1452 {
1453   MagickInfo
1454     *entry;
1455
1456   entry=AcquireMagickInfo("MAT","MAT","MATLAB level 5 image format");
1457   entry->decoder=(DecodeImageHandler *) ReadMATImage;
1458   entry->encoder=(EncodeImageHandler *) WriteMATImage;
1459   entry->flags^=CoderBlobSupportFlag;
1460   entry->flags|=CoderDecoderSeekableStreamFlag;
1461   (void) RegisterMagickInfo(entry);
1462   return(MagickImageCoderSignature);
1463 }
1464 \f
1465 /*
1466 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1467 %                                                                             %
1468 %                                                                             %
1469 %                                                                             %
1470 %   U n r e g i s t e r M A T I m a g e                                       %
1471 %                                                                             %
1472 %                                                                             %
1473 %                                                                             %
1474 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1475 %
1476 %  Method UnregisterMATImage removes format registrations made by the
1477 %  MAT module from the list of supported formats.
1478 %
1479 %  The format of the UnregisterMATImage method is:
1480 %
1481 %      UnregisterMATImage(void)
1482 %
1483 */
1484 ModuleExport void UnregisterMATImage(void)
1485 {
1486   (void) UnregisterMagickInfo("MAT");
1487 }
1488 \f
1489 /*
1490 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1491 %                                                                             %
1492 %                                                                             %
1493 %                                                                             %
1494 %   W r i t e M A T L A B I m a g e                                           %
1495 %                                                                             %
1496 %                                                                             %
1497 %                                                                             %
1498 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1499 %
1500 %  Function WriteMATImage writes an Matlab matrix to a file.
1501 %
1502 %  The format of the WriteMATImage method is:
1503 %
1504 %      MagickBooleanType WriteMATImage(const ImageInfo *image_info,
1505 %        Image *image,ExceptionInfo *exception)
1506 %
1507 %  A description of each parameter follows.
1508 %
1509 %    o image_info: Specifies a pointer to a ImageInfo structure.
1510 %
1511 %    o image:  A pointer to an Image structure.
1512 %
1513 %    o exception: return any errors or warnings in this structure.
1514 %
1515 */
1516 static MagickBooleanType WriteMATImage(const ImageInfo *image_info,Image *image,
1517   ExceptionInfo *exception)
1518 {
1519   char
1520     MATLAB_HDR[0x80];
1521
1522   MagickBooleanType
1523     status;
1524
1525   MagickOffsetType
1526     scene;
1527
1528   struct tm
1529     local_time;
1530
1531   time_t
1532     current_time;
1533
1534   /*
1535     Open output image file.
1536   */
1537   assert(image_info != (const ImageInfo *) NULL);
1538   assert(image_info->signature == MagickCoreSignature);
1539   assert(image != (Image *) NULL);
1540   assert(image->signature == MagickCoreSignature);
1541   (void) LogMagickEvent(CoderEvent,GetMagickModule(),"enter MAT");
1542   assert(exception != (ExceptionInfo *) NULL);
1543   assert(exception->signature == MagickCoreSignature);
1544   status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
1545   if (status == MagickFalse)
1546     return(MagickFalse);
1547   image->depth=8;
1548
1549   current_time=time((time_t *) NULL);
1550 #if defined(MAGICKCORE_HAVE_LOCALTIME_R)
1551   (void) localtime_r(&current_time,&local_time);
1552 #else
1553   (void) memcpy(&local_time,localtime(&current_time),sizeof(local_time));
1554 #endif
1555   (void) memset(MATLAB_HDR,' ',MagickMin(sizeof(MATLAB_HDR),124));
1556   FormatLocaleString(MATLAB_HDR,sizeof(MATLAB_HDR),
1557     "MATLAB 5.0 MAT-file, Platform: %s, Created on: %s %s %2d %2d:%2d:%2d %d",
1558     OsDesc,DayOfWTab[local_time.tm_wday],MonthsTab[local_time.tm_mon],
1559     local_time.tm_mday,local_time.tm_hour,local_time.tm_min,
1560     local_time.tm_sec,local_time.tm_year+1900);
1561   MATLAB_HDR[0x7C]=0;
1562   MATLAB_HDR[0x7D]=1;
1563   MATLAB_HDR[0x7E]='I';
1564   MATLAB_HDR[0x7F]='M';
1565   (void) WriteBlob(image,sizeof(MATLAB_HDR),(unsigned char *) MATLAB_HDR);
1566   scene=0;
1567   do
1568   {
1569     char
1570       padding;
1571
1572     MagickBooleanType
1573       is_gray;
1574
1575     QuantumInfo
1576       *quantum_info;
1577
1578     size_t
1579       data_size;
1580
1581     unsigned char
1582       *pixels;
1583
1584     unsigned int
1585       z;
1586
1587     (void) TransformImageColorspace(image,sRGBColorspace,exception);
1588     is_gray=SetImageGray(image,exception);
1589     z=(is_gray != MagickFalse) ? 0 : 3;
1590
1591     /*
1592       Store MAT header.
1593     */
1594     data_size = image->rows * image->columns;
1595     if (is_gray == MagickFalse)
1596       data_size*=3;
1597     padding=((unsigned char)(data_size-1) & 0x7) ^ 0x7;
1598
1599     (void) WriteBlobLSBLong(image,miMATRIX);
1600     (void) WriteBlobLSBLong(image,(unsigned int) data_size+padding+
1601       ((is_gray != MagickFalse) ? 48 : 56));
1602     (void) WriteBlobLSBLong(image,0x6); /* 0x88 */
1603     (void) WriteBlobLSBLong(image,0x8); /* 0x8C */
1604     (void) WriteBlobLSBLong(image,0x6); /* 0x90 */
1605     (void) WriteBlobLSBLong(image,0);
1606     (void) WriteBlobLSBLong(image,0x5); /* 0x98 */
1607     (void) WriteBlobLSBLong(image,(is_gray != MagickFalse) ? 0x8 : 0xC); /* 0x9C - DimFlag */
1608     (void) WriteBlobLSBLong(image,(unsigned int) image->rows);    /* x: 0xA0 */
1609     (void) WriteBlobLSBLong(image,(unsigned int) image->columns); /* y: 0xA4 */
1610     if (is_gray == MagickFalse)
1611       {
1612         (void) WriteBlobLSBLong(image,3); /* z: 0xA8 */
1613         (void) WriteBlobLSBLong(image,0);
1614       }
1615     (void) WriteBlobLSBShort(image,1);  /* 0xB0 */
1616     (void) WriteBlobLSBShort(image,1);  /* 0xB2 */
1617     (void) WriteBlobLSBLong(image,'M'); /* 0xB4 */
1618     (void) WriteBlobLSBLong(image,0x2); /* 0xB8 */
1619     (void) WriteBlobLSBLong(image,(unsigned int) data_size); /* 0xBC */
1620
1621     /*
1622       Store image data.
1623     */
1624     quantum_info=AcquireQuantumInfo(image_info,image);
1625     if (quantum_info == (QuantumInfo *) NULL)
1626       ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
1627     pixels=(unsigned char *) GetQuantumPixels(quantum_info);
1628     do
1629     {
1630       const Quantum
1631         *p;
1632
1633       ssize_t
1634         y;
1635
1636       for (y=0; y < (ssize_t)image->columns; y++)
1637       {
1638         p=GetVirtualPixels(image,y,0,1,image->rows,exception);
1639         if (p == (const Quantum *) NULL)
1640           break;
1641         (void) ExportQuantumPixels(image,(CacheView *) NULL,quantum_info,
1642           z2qtype[z],pixels,exception);
1643         (void) WriteBlob(image,image->rows,pixels);
1644       }
1645       if (SyncAuthenticPixels(image,exception) == MagickFalse)
1646         break;
1647     } while (z-- >= 2);
1648     while (padding-- > 0)
1649       (void) WriteBlobByte(image,0);
1650     quantum_info=DestroyQuantumInfo(quantum_info);
1651     if (GetNextImageInList(image) == (Image *) NULL)
1652       break;
1653     image=SyncNextImageInList(image);
1654     status=SetImageProgress(image,SaveImagesTag,scene++,
1655       GetImageListLength(image));
1656     if (status == MagickFalse)
1657       break;
1658   } while (image_info->adjoin != MagickFalse);
1659   (void) CloseBlob(image);
1660   return(status);
1661 }