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