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 -= 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     *rotate_image;
 606
 607   MagickBooleanType
 608     status;
 609
 610   MAT4_HDR
 611     HDR;
 612
 613   QuantumInfo
 614     *quantum_info;
 615
 616   QuantumFormatType
 617     format_type;
 618
 619   register ssize_t
 620     i;
 621
 622   ssize_t
 623     count,
 624     y;
 625
 626   unsigned char
 627     *pixels;
 628
 629   unsigned int
 630     depth;
 631
 632
 633   quantum_info=(QuantumInfo *) NULL;
 634   (void) SeekBlob(image,0,SEEK_SET);
 635   while (EOFBlob(image) != MagickFalse)
 636   {
 637     /*
 638      Object parser loop.
 639     */
 640     ldblk=ReadBlobLSBLong(image);
 641     if ((ldblk > 9999) || (ldblk < 0))
 642       break;
 643     HDR.Type[3]=ldblk % 10; ldblk /= 10;  /* T digit */
 644     HDR.Type[2]=ldblk % 10; ldblk /= 10;  /* P digit */
 645     HDR.Type[1]=ldblk % 10; ldblk /= 10;  /* O digit */
 646     HDR.Type[0]=ldblk;        /* M digit */
 647     if (HDR.Type[3] != 0)
 648       break;  /* Data format */
 649     if (HDR.Type[2] != 0)
 650       break;  /* Always 0 */
 651     if (HDR.Type[0] == 0)
 652       {
 653         HDR.nRows=ReadBlobLSBLong(image);
 654         HDR.nCols=ReadBlobLSBLong(image);
 655         HDR.imagf=ReadBlobLSBLong(image);
 656         HDR.nameLen=ReadBlobLSBLong(image);
 657         endian=LSBEndian;
 658       }
 659     else
 660       {
 661         HDR.nRows=ReadBlobMSBLong(image);
 662         HDR.nCols=ReadBlobMSBLong(image);
 663         HDR.imagf=ReadBlobMSBLong(image);
 664         HDR.nameLen=ReadBlobMSBLong(image);
 665         endian=MSBEndian;
 666       }
 667     if ((HDR.imagf != 0) && (HDR.imagf != 1))
 668       break;
 669     if (HDR.nameLen > 0xFFFF)
 670       return((Image *) NULL);
 671     for (i=0; i < (ssize_t) HDR.nameLen; i++)
 672     {
 673       int
 674         byte;
 675
 676       /*
 677         Skip matrix name.
 678       */
 679       byte=ReadBlobByte(image);
 680       if (byte == EOF)
 681         {
 682           ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
 683             image->filename);
 684           break;
 685         }
 686     }
 687     image->columns=(size_t) HDR.nRows;
 688     image->rows=(size_t) HDR.nCols;
 689     SetImageColorspace(image,GRAYColorspace,exception);
 690     if (image_info->ping != MagickFalse)
 691       {
 692         Swap(image->columns,image->rows);
 693         return(image);
 694       }
 695     status=SetImageExtent(image,image->columns,image->rows,exception);
 696     if (status == MagickFalse)
 697       return((Image *) NULL);
 698     quantum_info=AcquireQuantumInfo(image_info,image);
 699     if (quantum_info == (QuantumInfo *) NULL)
 700       return((Image *) NULL);
 701     switch(HDR.Type[1])
 702     {
 703       case 0:
 704         format_type=FloatingPointQuantumFormat;
 705         depth=64;
 706         break;
 707       case 1:
 708         format_type=FloatingPointQuantumFormat;
 709         depth=32;
 710         break;
 711       case 2:
 712         format_type=UnsignedQuantumFormat;
 713         depth=16;
 714         break;
 715       case 3:
 716         format_type=SignedQuantumFormat;
 717         depth=16;
 718         break;
 719       case 4:
 720         format_type=UnsignedQuantumFormat;
 721         depth=8;
 722         break;
 723       default:
 724         format_type=UnsignedQuantumFormat;
 725         depth=8;
 726         break;
 727     }
 728     image->depth=depth;
 729     if (HDR.Type[0] != 0)
 730       SetQuantumEndian(image,quantum_info,MSBEndian);
 731     status=SetQuantumFormat(image,quantum_info,format_type);
 732     status=SetQuantumDepth(image,quantum_info,depth);
 733     status=SetQuantumEndian(image,quantum_info,endian);
 734     SetQuantumScale(quantum_info,1.0);
 735     pixels=(unsigned char *) GetQuantumPixels(quantum_info);
 736     for (y=0; y < (ssize_t) image->rows; y++)
 737     {
 738       register Quantum
 739         *magick_restrict q;
 740
 741       count=ReadBlob(image,depth/8*image->columns,(char *) pixels);
 742       if (count == -1)
 743         break;
 744       q=QueueAuthenticPixels(image,0,image->rows-y-1,image->columns,1,
 745         exception);
 746       if (q == (Quantum *) NULL)
 747         break;
 748       (void) ImportQuantumPixels(image,(CacheView *) NULL,quantum_info,
 749         GrayQuantum,pixels,exception);
 750       if ((HDR.Type[1] == 2) || (HDR.Type[1] == 3))
 751         FixSignedValues(image,q,(int) image->columns);
 752       if (SyncAuthenticPixels(image,exception) == MagickFalse)
 753         break;
 754       if (image->previous == (Image *) NULL)
 755         {
 756           status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
 757             image->rows);
 758           if (status == MagickFalse)
 759             break;
 760         }
 761     }
 762     if (HDR.imagf == 1)
 763       for (y=0; y < (ssize_t) image->rows; y++)
 764       {
 765         /*
 766           Read complex pixels.
 767         */
 768         count=ReadBlob(image,depth/8*image->columns,(char *) pixels);
 769         if (count == -1)
 770           break;
 771         if (HDR.Type[1] == 0)
 772           InsertComplexDoubleRow(image,(double *) pixels,y,0,0,exception);
 773         else
 774           InsertComplexFloatRow(image,(float *) pixels,y,0,0,exception);
 775       }
 776     if (quantum_info != (QuantumInfo *) NULL)
 777       quantum_info=DestroyQuantumInfo(quantum_info);
 778     rotate_image=RotateImage(image,90.0,exception);
 779     if (rotate_image != (Image *) NULL)
 780       {
 781         image=DestroyImage(image);
 782         image=rotate_image;
 783       }
 784     if (EOFBlob(image) != MagickFalse)
 785       {
 786         ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
 787           image->filename);
 788         break;
 789       }
 790     /*
 791       Proceed to next image.
 792     */
 793     if (image_info->number_scenes != 0)
 794       if (image->scene >= (image_info->scene+image_info->number_scenes-1))
 795         break;
 796     /*
 797       Allocate next image structure.
 798     */
 799     AcquireNextImage(image_info,image,exception);
 800     if (GetNextImageInList(image) == (Image *) NULL)
 801       {
 802         image=DestroyImageList(image);
 803         return((Image *) NULL);
 804       }
 805     image=SyncNextImageInList(image);
 806     status=SetImageProgress(image,LoadImagesTag,TellBlob(image),
 807       GetBlobSize(image));
 808     if (status == MagickFalse)
 809       break;
 810   }
 811   (void) CloseBlob(image);
 812   return(GetFirstImageInList(image));
 813 }
 814 \f
 815 /*
 816 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 817 %                                                                             %
 818 %                                                                             %
 819 %                                                                             %
 820 %   R e a d M A T L A B i m a g e                                             %
 821 %                                                                             %
 822 %                                                                             %
 823 %                                                                             %
 824 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 825 %
 826 %  ReadMATImage() reads an MAT X image file and returns it.  It
 827 %  allocates the memory necessary for the new Image structure and returns a
 828 %  pointer to the new image.
 829 %
 830 %  The format of the ReadMATImage method is:
 831 %
 832 %      Image *ReadMATImage(const ImageInfo *image_info,ExceptionInfo *exception)
 833 %
 834 %  A description of each parameter follows:
 835 %
 836 %    o image:  Method ReadMATImage returns a pointer to the image after
 837 %      reading. A null image is returned if there is a memory shortage or if
 838 %      the image cannot be read.
 839 %
 840 %    o image_info: Specifies a pointer to a ImageInfo structure.
 841 %
 842 %    o exception: return any errors or warnings in this structure.
 843 %
 844 */
 845 static Image *ReadMATImage(const ImageInfo *image_info,ExceptionInfo *exception)
 846 {
 847   Image *image, *image2=NULL,
 848    *rotated_image;
 849   register Quantum *q;
 850
 851   unsigned int status;
 852   MATHeader MATLAB_HDR;
 853   size_t size;
 854   size_t CellType;
 855   QuantumInfo *quantum_info;
 856   ImageInfo *clone_info;
 857   int i;
 858   ssize_t ldblk;
 859   unsigned char *BImgBuff = NULL;
 860   double MinVal, MaxVal;
 861   unsigned z, z2;
 862   unsigned Frames;
 863   int logging;
 864   int sample_size;
 865   MagickOffsetType filepos=0x80;
 866   BlobInfo *blob;
 867   size_t one;
 868
 869   unsigned int (*ReadBlobXXXLong)(Image *image);
 870   unsigned short (*ReadBlobXXXShort)(Image *image);
 871   void (*ReadBlobDoublesXXX)(Image * image, size_t len, double *data);
 872   void (*ReadBlobFloatsXXX)(Image * image, size_t len, float *data);
 873
 874
 875   assert(image_info != (const ImageInfo *) NULL);
 876   assert(image_info->signature == MagickCoreSignature);
 877   assert(exception != (ExceptionInfo *) NULL);
 878   assert(exception->signature == MagickCoreSignature);
 879   logging = LogMagickEvent(CoderEvent,GetMagickModule(),"enter");
 880
 881   /*
 882      Open image file.
 883    */
 884   image = AcquireImage(image_info,exception);
 885
 886   status = OpenBlob(image_info, image, ReadBinaryBlobMode, exception);
 887   if (status == MagickFalse)
 888     {
 889       image=DestroyImageList(image);
 890       return((Image *) NULL);
 891     }
 892   /*
 893      Read MATLAB image.
 894    */
 895   quantum_info=(QuantumInfo *) NULL;
 896   clone_info=(ImageInfo *) NULL;
 897   if (ReadBlob(image,124,(unsigned char *) &MATLAB_HDR.identific) != 124)
 898     ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 899   if (strncmp(MATLAB_HDR.identific,"MATLAB",6) != 0)
 900     {
 901       image2=ReadMATImageV4(image_info,image,exception);
 902       if (image2  == NULL)
 903         goto MATLAB_KO;
 904       image=image2;
 905       goto END_OF_READING;
 906     }
 907   MATLAB_HDR.Version = ReadBlobLSBShort(image);
 908   if(ReadBlob(image,2,(unsigned char *) &MATLAB_HDR.EndianIndicator) != 2)
 909     ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 910
 911   if (logging)
 912     (void) LogMagickEvent(CoderEvent,GetMagickModule(),"  Endian %c%c",
 913       MATLAB_HDR.EndianIndicator[0],MATLAB_HDR.EndianIndicator[1]);
 914   if (!strncmp(MATLAB_HDR.EndianIndicator, "IM", 2))
 915   {
 916     ReadBlobXXXLong = ReadBlobLSBLong;
 917     ReadBlobXXXShort = ReadBlobLSBShort;
 918     ReadBlobDoublesXXX = ReadBlobDoublesLSB;
 919     ReadBlobFloatsXXX = ReadBlobFloatsLSB;
 920     image->endian = LSBEndian;
 921   }
 922   else if (!strncmp(MATLAB_HDR.EndianIndicator, "MI", 2))
 923   {
 924     ReadBlobXXXLong = ReadBlobMSBLong;
 925     ReadBlobXXXShort = ReadBlobMSBShort;
 926     ReadBlobDoublesXXX = ReadBlobDoublesMSB;
 927     ReadBlobFloatsXXX = ReadBlobFloatsMSB;
 928     image->endian = MSBEndian;
 929   }
 930   else
 931     goto MATLAB_KO;    /* unsupported endian */
 932
 933   if (strncmp(MATLAB_HDR.identific, "MATLAB", 6))
 934     {
 935 MATLAB_KO:
 936       clone_info=DestroyImageInfo(clone_info);
 937       ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 938     }
 939
 940   filepos = TellBlob(image);
 941   while(!EOFBlob(image)) /* object parser loop */
 942   {
 943     Frames = 1;
 944     (void) SeekBlob(image,filepos,SEEK_SET);
 945     /* printf("pos=%X\n",TellBlob(image)); */
 946
 947     MATLAB_HDR.DataType = ReadBlobXXXLong(image);
 948     if(EOFBlob(image)) break;
 949     MATLAB_HDR.ObjectSize = ReadBlobXXXLong(image);
 950     if(EOFBlob(image)) break;
 951     if((MagickSizeType) (MATLAB_HDR.ObjectSize+filepos) > GetBlobSize(image))
 952       goto MATLAB_KO;
 953     filepos += MATLAB_HDR.ObjectSize + 4 + 4;
 954
 955     clone_info=CloneImageInfo(image_info);
 956     image2 = image;
 957 #if defined(MAGICKCORE_ZLIB_DELEGATE)
 958     if(MATLAB_HDR.DataType == miCOMPRESSED)
 959     {
 960       image2 = decompress_block(image,&MATLAB_HDR.ObjectSize,clone_info,exception);
 961       if(image2==NULL) continue;
 962       MATLAB_HDR.DataType = ReadBlobXXXLong(image2); /* replace compressed object type. */
 963     }
 964 #endif
 965
 966     if(MATLAB_HDR.DataType!=miMATRIX) continue;  /* skip another objects. */
 967
 968     MATLAB_HDR.unknown1 = ReadBlobXXXLong(image2);
 969     MATLAB_HDR.unknown2 = ReadBlobXXXLong(image2);
 970
 971     MATLAB_HDR.unknown5 = ReadBlobXXXLong(image2);
 972     MATLAB_HDR.StructureClass = MATLAB_HDR.unknown5 & 0xFF;
 973     MATLAB_HDR.StructureFlag = (MATLAB_HDR.unknown5>>8) & 0xFF;
 974
 975     MATLAB_HDR.unknown3 = ReadBlobXXXLong(image2);
 976     if(image!=image2)
 977       MATLAB_HDR.unknown4 = ReadBlobXXXLong(image2);  /* ??? don't understand why ?? */
 978     MATLAB_HDR.unknown4 = ReadBlobXXXLong(image2);
 979     MATLAB_HDR.DimFlag = ReadBlobXXXLong(image2);
 980     MATLAB_HDR.SizeX = ReadBlobXXXLong(image2);
 981     MATLAB_HDR.SizeY = ReadBlobXXXLong(image2);
 982
 983
 984     switch(MATLAB_HDR.DimFlag)
 985     {
 986       case  8: z2=z=1; break;      /* 2D matrix*/
 987       case 12: z2=z = ReadBlobXXXLong(image2);  /* 3D matrix RGB*/
 988            (void) ReadBlobXXXLong(image2);
 989          if(z!=3) ThrowReaderException(CoderError, "MultidimensionalMatricesAreNotSupported");
 990          break;
 991       case 16: z2=z = ReadBlobXXXLong(image2);  /* 4D matrix animation */
 992          if(z!=3 && z!=1)
 993             ThrowReaderException(CoderError, "MultidimensionalMatricesAreNotSupported");
 994          Frames = ReadBlobXXXLong(image2);
 995          if (Frames == 0)
 996            ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 997          break;
 998       default: ThrowReaderException(CoderError, "MultidimensionalMatricesAreNotSupported");
 999     }
1000
1001     MATLAB_HDR.Flag1 = ReadBlobXXXShort(image2);
1002     MATLAB_HDR.NameFlag = ReadBlobXXXShort(image2);
1003
1004     if (logging) (void)LogMagickEvent(CoderEvent,GetMagickModule(),
1005           "MATLAB_HDR.StructureClass %d",MATLAB_HDR.StructureClass);
1006     if (MATLAB_HDR.StructureClass != mxCHAR_CLASS &&
1007         MATLAB_HDR.StructureClass != mxSINGLE_CLASS &&    /* float + complex float */
1008         MATLAB_HDR.StructureClass != mxDOUBLE_CLASS &&    /* double + complex double */
1009         MATLAB_HDR.StructureClass != mxINT8_CLASS &&
1010         MATLAB_HDR.StructureClass != mxUINT8_CLASS &&    /* uint8 + uint8 3D */
1011         MATLAB_HDR.StructureClass != mxINT16_CLASS &&
1012         MATLAB_HDR.StructureClass != mxUINT16_CLASS &&    /* uint16 + uint16 3D */
1013         MATLAB_HDR.StructureClass != mxINT32_CLASS &&
1014         MATLAB_HDR.StructureClass != mxUINT32_CLASS &&    /* uint32 + uint32 3D */
1015         MATLAB_HDR.StructureClass != mxINT64_CLASS &&
1016         MATLAB_HDR.StructureClass != mxUINT64_CLASS)    /* uint64 + uint64 3D */
1017       ThrowReaderException(CoderError,"UnsupportedCellTypeInTheMatrix");
1018
1019     switch (MATLAB_HDR.NameFlag)
1020     {
1021       case 0:
1022         size = ReadBlobXXXLong(image2);  /* Object name string size */
1023         size = 4 * (ssize_t) ((size + 3 + 1) / 4);
1024         (void) SeekBlob(image2, size, SEEK_CUR);
1025         break;
1026       case 1:
1027       case 2:
1028       case 3:
1029       case 4:
1030         (void) ReadBlob(image2, 4, (unsigned char *) &size); /* Object name string */
1031         break;
1032       default:
1033         goto MATLAB_KO;
1034     }
1035
1036     CellType = ReadBlobXXXLong(image2);    /* Additional object type */
1037     if (logging)
1038       (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1039         "MATLAB_HDR.CellType: %.20g",(double) CellType);
1040
1041     (void) ReadBlob(image2, 4, (unsigned char *) &size);     /* data size */
1042
1043     NEXT_FRAME:
1044     switch (CellType)
1045     {
1046       case miINT8:
1047       case miUINT8:
1048         sample_size = 8;
1049         if(MATLAB_HDR.StructureFlag & FLAG_LOGICAL)
1050           image->depth = 1;
1051         else
1052           image->depth = 8;         /* Byte type cell */
1053         ldblk = (ssize_t) MATLAB_HDR.SizeX;
1054         break;
1055       case miINT16:
1056       case miUINT16:
1057         sample_size = 16;
1058         image->depth = 16;        /* Word type cell */
1059         ldblk = (ssize_t) (2 * MATLAB_HDR.SizeX);
1060         break;
1061       case miINT32:
1062       case miUINT32:
1063         sample_size = 32;
1064         image->depth = 32;        /* Dword type cell */
1065         ldblk = (ssize_t) (4 * MATLAB_HDR.SizeX);
1066         break;
1067       case miINT64:
1068       case miUINT64:
1069         sample_size = 64;
1070         image->depth = 64;        /* Qword type cell */
1071         ldblk = (ssize_t) (8 * MATLAB_HDR.SizeX);
1072         break;
1073       case miSINGLE:
1074         sample_size = 32;
1075         image->depth = 32;        /* double type cell */
1076         (void) SetImageOption(clone_info,"quantum:format","floating-point");
1077         if (MATLAB_HDR.StructureFlag & FLAG_COMPLEX)
1078   {              /* complex float type cell */
1079   }
1080         ldblk = (ssize_t) (4 * MATLAB_HDR.SizeX);
1081         break;
1082       case miDOUBLE:
1083         sample_size = 64;
1084         image->depth = 64;        /* double type cell */
1085         (void) SetImageOption(clone_info,"quantum:format","floating-point");
1086 DisableMSCWarning(4127)
1087         if (sizeof(double) != 8)
1088 RestoreMSCWarning
1089           ThrowReaderException(CoderError, "IncompatibleSizeOfDouble");
1090         if (MATLAB_HDR.StructureFlag & FLAG_COMPLEX)
1091   {                         /* complex double type cell */
1092   }
1093         ldblk = (ssize_t) (8 * MATLAB_HDR.SizeX);
1094         break;
1095       default:
1096         ThrowReaderException(CoderError, "UnsupportedCellTypeInTheMatrix");
1097     }
1098     (void) sample_size;
1099     image->columns = MATLAB_HDR.SizeX;
1100     image->rows = MATLAB_HDR.SizeY;
1101     one=1;
1102     image->colors = one << image->depth;
1103     if (image->columns == 0 || image->rows == 0)
1104       goto MATLAB_KO;
1105     if((unsigned long)ldblk*MATLAB_HDR.SizeY > MATLAB_HDR.ObjectSize)
1106       goto MATLAB_KO;
1107     /* Image is gray when no complex flag is set and 2D Matrix */
1108     if ((MATLAB_HDR.DimFlag == 8) &&
1109         ((MATLAB_HDR.StructureFlag & FLAG_COMPLEX) == 0))
1110       {
1111         image->type=GrayscaleType;
1112         SetImageColorspace(image,GRAYColorspace,exception);
1113       }
1114
1115
1116     /*
1117       If ping is true, then only set image size and colors without
1118       reading any image data.
1119     */
1120     if (image_info->ping)
1121     {
1122       size_t temp = image->columns;
1123       image->columns = image->rows;
1124       image->rows = temp;
1125       goto done_reading; /* !!!!!! BAD  !!!! */
1126     }
1127     status=SetImageExtent(image,image->columns,image->rows,exception);
1128     if (status == MagickFalse)
1129       return(DestroyImageList(image));
1130     quantum_info=AcquireQuantumInfo(clone_info,image);
1131     if (quantum_info == (QuantumInfo *) NULL)
1132       ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
1133
1134   /* ----- Load raster data ----- */
1135     BImgBuff = (unsigned char *) AcquireQuantumMemory((size_t) (ldblk),sizeof(double));    /* Ldblk was set in the check phase */
1136     if (BImgBuff == NULL)
1137       ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
1138     (void) ResetMagickMemory(BImgBuff,0,ldblk*sizeof(double));
1139
1140     MinVal = 0;
1141     MaxVal = 0;
1142     if (CellType==miDOUBLE || CellType==miSINGLE)        /* Find Min and Max Values for floats */
1143     {
1144       CalcMinMax(image2, image_info->endian,  MATLAB_HDR.SizeX, MATLAB_HDR.SizeY, CellType, ldblk, BImgBuff, &quantum_info->minimum, &quantum_info->maximum);
1145     }
1146
1147     /* Main loop for reading all scanlines */
1148     if(z==1) z=0; /* read grey scanlines */
1149     /* else read color scanlines */
1150     do
1151     {
1152       for (i = 0; i < (ssize_t) MATLAB_HDR.SizeY; i++)
1153       {
1154         q=GetAuthenticPixels(image,0,MATLAB_HDR.SizeY-i-1,image->columns,1,exception);
1155         if (q == (Quantum *) NULL)
1156   {
1157     if (logging) (void)LogMagickEvent(CoderEvent,GetMagickModule(),
1158               "  MAT set image pixels returns unexpected NULL on a row %u.", (unsigned)(MATLAB_HDR.SizeY-i-1));
1159     goto done_reading;    /* Skip image rotation, when cannot set image pixels    */
1160   }
1161         if(ReadBlob(image2,ldblk,(unsigned char *)BImgBuff) != (ssize_t) ldblk)
1162   {
1163     if (logging) (void)LogMagickEvent(CoderEvent,GetMagickModule(),
1164              "  MAT cannot read scanrow %u from a file.", (unsigned)(MATLAB_HDR.SizeY-i-1));
1165     goto ExitLoop;
1166   }
1167         if((CellType==miINT8 || CellType==miUINT8) && (MATLAB_HDR.StructureFlag & FLAG_LOGICAL))
1168         {
1169           FixLogical((unsigned char *)BImgBuff,ldblk);
1170           if(ImportQuantumPixels(image,(CacheView *) NULL,quantum_info,z2qtype[z],BImgBuff,exception) <= 0)
1171     {
1172 ImportQuantumPixelsFailed:
1173       if (logging) (void)LogMagickEvent(CoderEvent,GetMagickModule(),
1174               "  MAT failed to ImportQuantumPixels for a row %u", (unsigned)(MATLAB_HDR.SizeY-i-1));
1175       break;
1176     }
1177         }
1178         else
1179         {
1180           if(ImportQuantumPixels(image,(CacheView *) NULL,quantum_info,z2qtype[z],BImgBuff,exception) <= 0)
1181       goto ImportQuantumPixelsFailed;
1182
1183
1184           if (z<=1 &&       /* fix only during a last pass z==0 || z==1 */
1185           (CellType==miINT8 || CellType==miINT16 || CellType==miINT32 || CellType==miINT64))
1186       FixSignedValues(image,q,MATLAB_HDR.SizeX);
1187         }
1188
1189         if (!SyncAuthenticPixels(image,exception))
1190   {
1191     if (logging) (void)LogMagickEvent(CoderEvent,GetMagickModule(),
1192             "  MAT failed to sync image pixels for a row %u", (unsigned)(MATLAB_HDR.SizeY-i-1));
1193     goto ExitLoop;
1194   }
1195       }
1196     } while(z-- >= 2);
1197 ExitLoop:
1198
1199
1200     /* Read complex part of numbers here */
1201     if (MATLAB_HDR.StructureFlag & FLAG_COMPLEX)
1202     {        /* Find Min and Max Values for complex parts of floats */
1203       CellType = ReadBlobXXXLong(image2);    /* Additional object type */
1204       i = ReadBlobXXXLong(image2);           /* size of a complex part - toss away*/
1205
1206       if (CellType==miDOUBLE || CellType==miSINGLE)
1207       {
1208         CalcMinMax(image2,  image_info->endian, MATLAB_HDR.SizeX, MATLAB_HDR.SizeY, CellType, ldblk, BImgBuff, &MinVal, &MaxVal);
1209       }
1210
1211       if (CellType==miDOUBLE)
1212         for (i = 0; i < (ssize_t) MATLAB_HDR.SizeY; i++)
1213   {
1214           ReadBlobDoublesXXX(image2, ldblk, (double *)BImgBuff);
1215           InsertComplexDoubleRow(image, (double *)BImgBuff, i, MinVal, MaxVal,
1216             exception);
1217   }
1218
1219       if (CellType==miSINGLE)
1220         for (i = 0; i < (ssize_t) MATLAB_HDR.SizeY; i++)
1221   {
1222           ReadBlobFloatsXXX(image2, ldblk, (float *)BImgBuff);
1223           InsertComplexFloatRow(image,(float *)BImgBuff,i,MinVal,MaxVal,
1224             exception);
1225   }
1226     }
1227
1228       /* Image is gray when no complex flag is set and 2D Matrix AGAIN!!! */
1229     if ((MATLAB_HDR.DimFlag == 8) &&
1230         ((MATLAB_HDR.StructureFlag & FLAG_COMPLEX) == 0))
1231       image->type=GrayscaleType;
1232     if (image->depth == 1)
1233       image->type=BilevelType;
1234
1235     if(image2==image)
1236         image2 = NULL;    /* Remove shadow copy to an image before rotation. */
1237
1238       /*  Rotate image. */
1239     rotated_image = RotateImage(image, 90.0, exception);
1240     if (rotated_image != (Image *) NULL)
1241     {
1242         /* Remove page offsets added by RotateImage */
1243       rotated_image->page.x=0;
1244       rotated_image->page.y=0;
1245
1246       blob = rotated_image->blob;
1247       rotated_image->blob = image->blob;
1248       rotated_image->colors = image->colors;
1249       image->blob = blob;
1250       AppendImageToList(&image,rotated_image);
1251       DeleteImageFromList(&image);
1252     }
1253
1254 done_reading:
1255
1256     if(image2!=NULL)
1257       if(image2!=image)
1258       {
1259         DeleteImageFromList(&image2);
1260   if(clone_info)
1261   {
1262           if(clone_info->file)
1263     {
1264             fclose(clone_info->file);
1265             clone_info->file = NULL;
1266             (void) remove_utf8(clone_info->filename);
1267     }
1268         }
1269       }
1270
1271       /* Allocate next image structure. */
1272     AcquireNextImage(image_info,image,exception);
1273     if (image->next == (Image *) NULL) break;
1274     image=SyncNextImageInList(image);
1275     image->columns=image->rows=0;
1276     image->colors=0;
1277
1278       /* row scan buffer is no longer needed */
1279     RelinquishMagickMemory(BImgBuff);
1280     BImgBuff = NULL;
1281
1282     if(--Frames>0)
1283     {
1284       z = z2;
1285       if(image2==NULL) image2 = image;
1286       goto NEXT_FRAME;
1287     }
1288     if ((image2!=NULL) && (image2!=image))   /* Does shadow temporary decompressed image exist? */
1289       {
1290 /*  CloseBlob(image2); */
1291         DeleteImageFromList(&image2);
1292         if(clone_info)
1293         {
1294           if(clone_info->file)
1295           {
1296             fclose(clone_info->file);
1297             clone_info->file = NULL;
1298             (void) remove_utf8(clone_info->filename);
1299           }
1300         }
1301         }
1302   }
1303
1304   RelinquishMagickMemory(BImgBuff);
1305   if (quantum_info != (QuantumInfo *) NULL)
1306     quantum_info=DestroyQuantumInfo(quantum_info);
1307 END_OF_READING:
1308   if (clone_info)
1309     clone_info=DestroyImageInfo(clone_info);
1310   CloseBlob(image);
1311
1312
1313   {
1314     Image *p;
1315     ssize_t scene=0;
1316
1317     /*
1318       Rewind list, removing any empty images while rewinding.
1319     */
1320     p=image;
1321     image=NULL;
1322     while (p != (Image *) NULL)
1323       {
1324         Image *tmp=p;
1325         if ((p->rows == 0) || (p->columns == 0)) {
1326           p=p->previous;
1327           DeleteImageFromList(&tmp);
1328         } else {
1329           image=p;
1330           p=p->previous;
1331         }
1332       }
1333
1334     /*
1335       Fix scene numbers
1336     */
1337     for (p=image; p != (Image *) NULL; p=p->next)
1338       p->scene=scene++;
1339   }
1340
1341   if(clone_info != NULL)  /* cleanup garbage file from compression */
1342   {
1343     if(clone_info->file)
1344     {
1345       fclose(clone_info->file);
1346       clone_info->file = NULL;
1347       (void) remove_utf8(clone_info->filename);
1348     }
1349     DestroyImageInfo(clone_info);
1350     clone_info = NULL;
1351   }
1352   if (logging) (void)LogMagickEvent(CoderEvent,GetMagickModule(),"return");
1353   if(image==NULL)
1354     ThrowReaderException(CorruptImageError,"ImproperImageHeader");
1355   return (image);
1356 }
1357 \f
1358 /*
1359 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1360 %                                                                             %
1361 %                                                                             %
1362 %                                                                             %
1363 %   R e g i s t e r M A T I m a g e                                           %
1364 %                                                                             %
1365 %                                                                             %
1366 %                                                                             %
1367 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1368 %
1369 %  Method RegisterMATImage adds attributes for the MAT image format to
1370 %  the list of supported formats.  The attributes include the image format
1371 %  tag, a method to read and/or write the format, whether the format
1372 %  supports the saving of more than one frame to the same file or blob,
1373 %  whether the format supports native in-memory I/O, and a brief
1374 %  description of the format.
1375 %
1376 %  The format of the RegisterMATImage method is:
1377 %
1378 %      size_t RegisterMATImage(void)
1379 %
1380 */
1381 ModuleExport size_t RegisterMATImage(void)
1382 {
1383   MagickInfo
1384     *entry;
1385
1386   entry=AcquireMagickInfo("MAT","MAT","MATLAB level 5 image format");
1387   entry->decoder=(DecodeImageHandler *) ReadMATImage;
1388   entry->encoder=(EncodeImageHandler *) WriteMATImage;
1389   entry->flags^=CoderBlobSupportFlag;
1390   entry->flags|=CoderDecoderSeekableStreamFlag;
1391   (void) RegisterMagickInfo(entry);
1392   return(MagickImageCoderSignature);
1393 }
1394 \f
1395 /*
1396 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1397 %                                                                             %
1398 %                                                                             %
1399 %                                                                             %
1400 %   U n r e g i s t e r M A T I m a g e                                       %
1401 %                                                                             %
1402 %                                                                             %
1403 %                                                                             %
1404 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1405 %
1406 %  Method UnregisterMATImage removes format registrations made by the
1407 %  MAT module from the list of supported formats.
1408 %
1409 %  The format of the UnregisterMATImage method is:
1410 %
1411 %      UnregisterMATImage(void)
1412 %
1413 */
1414 ModuleExport void UnregisterMATImage(void)
1415 {
1416   (void) UnregisterMagickInfo("MAT");
1417 }
1418 \f
1419 /*
1420 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1421 %                                                                             %
1422 %                                                                             %
1423 %                                                                             %
1424 %   W r i t e M A T L A B I m a g e                                           %
1425 %                                                                             %
1426 %                                                                             %
1427 %                                                                             %
1428 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1429 %
1430 %  Function WriteMATImage writes an Matlab matrix to a file.
1431 %
1432 %  The format of the WriteMATImage method is:
1433 %
1434 %      MagickBooleanType WriteMATImage(const ImageInfo *image_info,
1435 %        Image *image,ExceptionInfo *exception)
1436 %
1437 %  A description of each parameter follows.
1438 %
1439 %    o image_info: Specifies a pointer to a ImageInfo structure.
1440 %
1441 %    o image:  A pointer to an Image structure.
1442 %
1443 %    o exception: return any errors or warnings in this structure.
1444 %
1445 */
1446 static MagickBooleanType WriteMATImage(const ImageInfo *image_info,Image *image,
1447   ExceptionInfo *exception)
1448 {
1449   char
1450     MATLAB_HDR[0x80];
1451
1452   MagickBooleanType
1453     status;
1454
1455   MagickOffsetType
1456     scene;
1457
1458   struct tm
1459     local_time;
1460
1461   time_t
1462     current_time;
1463
1464   /*
1465     Open output image file.
1466   */
1467   assert(image_info != (const ImageInfo *) NULL);
1468   assert(image_info->signature == MagickCoreSignature);
1469   assert(image != (Image *) NULL);
1470   assert(image->signature == MagickCoreSignature);
1471   (void) LogMagickEvent(CoderEvent,GetMagickModule(),"enter MAT");
1472   assert(exception != (ExceptionInfo *) NULL);
1473   assert(exception->signature == MagickCoreSignature);
1474   status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
1475   if (status == MagickFalse)
1476     return(MagickFalse);
1477   image->depth=8;
1478
1479   current_time=time((time_t *) NULL);
1480 #if defined(MAGICKCORE_HAVE_LOCALTIME_R)
1481   (void) localtime_r(&current_time,&local_time);
1482 #else
1483   (void) memcpy(&local_time,localtime(&current_time),sizeof(local_time));
1484 #endif
1485   (void) memset(MATLAB_HDR,' ',MagickMin(sizeof(MATLAB_HDR),124));
1486   FormatLocaleString(MATLAB_HDR,sizeof(MATLAB_HDR),
1487     "MATLAB 5.0 MAT-file, Platform: %s, Created on: %s %s %2d %2d:%2d:%2d %d",
1488     OsDesc,DayOfWTab[local_time.tm_wday],MonthsTab[local_time.tm_mon],
1489     local_time.tm_mday,local_time.tm_hour,local_time.tm_min,
1490     local_time.tm_sec,local_time.tm_year+1900);
1491   MATLAB_HDR[0x7C]=0;
1492   MATLAB_HDR[0x7D]=1;
1493   MATLAB_HDR[0x7E]='I';
1494   MATLAB_HDR[0x7F]='M';
1495   (void) WriteBlob(image,sizeof(MATLAB_HDR),(unsigned char *) MATLAB_HDR);
1496   scene=0;
1497   do
1498   {
1499     char
1500       padding;
1501
1502     MagickBooleanType
1503       is_gray;
1504
1505     QuantumInfo
1506       *quantum_info;
1507
1508     size_t
1509       data_size;
1510
1511     unsigned char
1512       *pixels;
1513
1514     unsigned int
1515       z;
1516
1517     (void) TransformImageColorspace(image,sRGBColorspace,exception);
1518     is_gray=SetImageGray(image,exception);
1519     z=(is_gray != MagickFalse) ? 0 : 3;
1520
1521     /*
1522       Store MAT header.
1523     */
1524     data_size = image->rows * image->columns;
1525     if (is_gray == MagickFalse)
1526       data_size*=3;
1527     padding=((unsigned char)(data_size-1) & 0x7) ^ 0x7;
1528
1529     (void) WriteBlobLSBLong(image,miMATRIX);
1530     (void) WriteBlobLSBLong(image,(unsigned int) data_size+padding+
1531       ((is_gray != MagickFalse) ? 48 : 56));
1532     (void) WriteBlobLSBLong(image,0x6); /* 0x88 */
1533     (void) WriteBlobLSBLong(image,0x8); /* 0x8C */
1534     (void) WriteBlobLSBLong(image,0x6); /* 0x90 */
1535     (void) WriteBlobLSBLong(image,0);
1536     (void) WriteBlobLSBLong(image,0x5); /* 0x98 */
1537     (void) WriteBlobLSBLong(image,(is_gray != MagickFalse) ? 0x8 : 0xC); /* 0x9C - DimFlag */
1538     (void) WriteBlobLSBLong(image,(unsigned int) image->rows);    /* x: 0xA0 */
1539     (void) WriteBlobLSBLong(image,(unsigned int) image->columns); /* y: 0xA4 */
1540     if (is_gray == MagickFalse)
1541       {
1542         (void) WriteBlobLSBLong(image,3); /* z: 0xA8 */
1543         (void) WriteBlobLSBLong(image,0);
1544       }
1545     (void) WriteBlobLSBShort(image,1);  /* 0xB0 */
1546     (void) WriteBlobLSBShort(image,1);  /* 0xB2 */
1547     (void) WriteBlobLSBLong(image,'M'); /* 0xB4 */
1548     (void) WriteBlobLSBLong(image,0x2); /* 0xB8 */
1549     (void) WriteBlobLSBLong(image,(unsigned int) data_size); /* 0xBC */
1550
1551     /*
1552       Store image data.
1553     */
1554     quantum_info=AcquireQuantumInfo(image_info,image);
1555     if (quantum_info == (QuantumInfo *) NULL)
1556       ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
1557     pixels=(unsigned char *) GetQuantumPixels(quantum_info);
1558     do
1559     {
1560       const Quantum
1561         *p;
1562
1563       ssize_t
1564         y;
1565
1566       for (y=0; y < (ssize_t)image->columns; y++)
1567       {
1568         p=GetVirtualPixels(image,y,0,1,image->rows,exception);
1569         if (p == (const Quantum *) NULL)
1570           break;
1571         (void) ExportQuantumPixels(image,(CacheView *) NULL,quantum_info,
1572           z2qtype[z],pixels,exception);
1573         (void) WriteBlob(image,image->rows,pixels);
1574       }
1575       if (SyncAuthenticPixels(image,exception) == MagickFalse)
1576         break;
1577     } while (z-- >= 2);
1578     while (padding-- > 0)
1579       (void) WriteBlobByte(image,0);
1580     quantum_info=DestroyQuantumInfo(quantum_info);
1581     if (GetNextImageInList(image) == (Image *) NULL)
1582       break;
1583     image=SyncNextImageInList(image);
1584     status=SetImageProgress(image,SaveImagesTag,scene++,
1585       GetImageListLength(image));
1586     if (status == MagickFalse)
1587       break;
1588   } while (image_info->adjoin != MagickFalse);
1589   (void) CloseBlob(image);
1590   return(status);
1591 }