granicus.if.org Git - imagemagick/blob - coders/mat.c

   1 /*
   2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   3 %                                                                             %
   4 %                                                                             %
   5 %                  M   M   AAA   TTTTT  L       AAA   BBBB                    %
   6 %                  MM MM  A   A    T    L      A   A  B   B                   %
   7 %                  M M M  AAAAA    T    L      AAAAA  BBBB                    %
   8 %                  M   M  A   A    T    L      A   A  B   B                   %
   9 %                  M   M  A   A    T    LLLLL  A   A  BBBB                    %
  10 %                                                                             %
  11 %                                                                             %
  12 %                        Read MATLAB Image Format                             %
  13 %                                                                             %
  14 %                              Software Design                                %
  15 %                              Jaroslav Fojtik                                %
  16 %                                2001-2008                                    %
  17 %                                                                             %
  18 %                                                                             %
  19 %  Permission is hereby granted, free of charge, to any person obtaining a    %
  20 %  copy of this software and associated documentation files ("ImageMagick"),  %
  21 %  to deal in ImageMagick without restriction, including without limitation   %
  22 %  the rights to use, copy, modify, merge, publish, distribute, sublicense,   %
  23 %  and/or sell copies of ImageMagick, and to permit persons to whom the       %
  24 %  ImageMagick is furnished to do so, subject to the following conditions:    %
  25 %                                                                             %
  26 %  The above copyright notice and this permission notice shall be included in %
  27 %  all copies or substantial portions of ImageMagick.                         %
  28 %                                                                             %
  29 %  The software is provided "as is", without warranty of any kind, express or %
  30 %  implied, including but not limited to the warranties of merchantability,   %
  31 %  fitness for a particular purpose and noninfringement.  In no event shall   %
  32 %  ImageMagick Studio be liable for any claim, damages or other liability,    %
  33 %  whether in an action of contract, tort or otherwise, arising from, out of  %
  34 %  or in connection with ImageMagick or the use or other dealings in          %
  35 %  ImageMagick.                                                               %
  36 %                                                                             %
  37 %  Except as contained in this notice, the name of the ImageMagick Studio     %
  38 %  shall not be used in advertising or otherwise to promote the sale, use or  %
  39 %  other dealings in ImageMagick without prior written authorization from the %
  40 %  ImageMagick Studio.                                                        %
  41 %                                                                             %
  42 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  43 %
  44 %
  45 */
  46 \f
  47 /*
  48   Include declarations.
  49 */
  50 #include "MagickCore/studio.h"
  51 #include "MagickCore/attribute.h"
  52 #include "MagickCore/blob.h"
  53 #include "MagickCore/blob-private.h"
  54 #include "MagickCore/cache.h"
  55 #include "MagickCore/color-private.h"
  56 #include "MagickCore/colormap.h"
  57 #include "MagickCore/colorspace-private.h"
  58 #include "MagickCore/distort.h"
  59 #include "MagickCore/exception.h"
  60 #include "MagickCore/exception-private.h"
  61 #include "MagickCore/image.h"
  62 #include "MagickCore/image-private.h"
  63 #include "MagickCore/list.h"
  64 #include "MagickCore/magick.h"
  65 #include "MagickCore/memory_.h"
  66 #include "MagickCore/monitor.h"
  67 #include "MagickCore/monitor-private.h"
  68 #include "MagickCore/pixel-accessor.h"
  69 #include "MagickCore/quantum.h"
  70 #include "MagickCore/quantum-private.h"
  71 #include "MagickCore/option.h"
  72 #include "MagickCore/pixel.h"
  73 #include "MagickCore/resource_.h"
  74 #include "MagickCore/static.h"
  75 #include "MagickCore/string_.h"
  76 #include "MagickCore/module.h"
  77 #include "MagickCore/transform.h"
  78 #include "MagickCore/utility-private.h"
  79 #if defined(MAGICKCORE_ZLIB_DELEGATE)
  80  #include "zlib.h"
  81 #endif
  82 \f
  83 /*
  84   Forward declaration.
  85 */
  86 static MagickBooleanType
  87   WriteMATImage(const ImageInfo *,Image *,ExceptionInfo *);
  88
  89
  90 /* Auto coloring method, sorry this creates some artefact inside data
  91 MinReal+j*MaxComplex = red  MaxReal+j*MaxComplex = black
  92 MinReal+j*0 = white          MaxReal+j*0 = black
  93 MinReal+j*MinComplex = blue  MaxReal+j*MinComplex = black
  94 */
  95
  96 typedef struct
  97 {
  98   char identific[124];
  99   unsigned short Version;
 100   char EndianIndicator[2];
 101   unsigned long DataType;
 102   unsigned int ObjectSize;
 103   unsigned long unknown1;
 104   unsigned long unknown2;
 105
 106   unsigned short unknown5;
 107   unsigned char StructureFlag;
 108   unsigned char StructureClass;
 109   unsigned long unknown3;
 110   unsigned long unknown4;
 111   unsigned long DimFlag;
 112
 113   unsigned long SizeX;
 114   unsigned long SizeY;
 115   unsigned short Flag1;
 116   unsigned short NameFlag;
 117 }
 118 MATHeader;
 119
 120 static const char *MonthsTab[12]={"Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"};
 121 static const char *DayOfWTab[7]={"Sun","Mon","Tue","Wed","Thu","Fri","Sat"};
 122 static const char *OsDesc=
 123 #if defined(MAGICKCORE_WINDOWS_SUPPORT)
 124     "PCWIN";
 125 #else
 126  #ifdef __APPLE__
 127     "MAC";
 128  #else
 129     "LNX86";
 130  #endif
 131 #endif
 132
 133 typedef enum
 134   {
 135     miINT8 = 1,      /* 8 bit signed */
 136     miUINT8,      /* 8 bit unsigned */
 137     miINT16,      /* 16 bit signed */
 138     miUINT16,      /* 16 bit unsigned */
 139     miINT32,      /* 32 bit signed */
 140     miUINT32,      /* 32 bit unsigned */
 141     miSINGLE,      /* IEEE 754 single precision float */
 142     miRESERVE1,
 143     miDOUBLE,      /* IEEE 754 double precision float */
 144     miRESERVE2,
 145     miRESERVE3,
 146     miINT64,      /* 64 bit signed */
 147     miUINT64,      /* 64 bit unsigned */
 148     miMATRIX,            /* MATLAB array */
 149     miCOMPRESSED,          /* Compressed Data */
 150     miUTF8,            /* Unicode UTF-8 Encoded Character Data */
 151     miUTF16,            /* Unicode UTF-16 Encoded Character Data */
 152     miUTF32      /* Unicode UTF-32 Encoded Character Data */
 153   } mat5_data_type;
 154
 155 typedef enum
 156   {
 157     mxCELL_CLASS=1,    /* cell array */
 158     mxSTRUCT_CLASS,    /* structure */
 159     mxOBJECT_CLASS,    /* object */
 160     mxCHAR_CLASS,    /* character array */
 161     mxSPARSE_CLASS,    /* sparse array */
 162     mxDOUBLE_CLASS,    /* double precision array */
 163     mxSINGLE_CLASS,    /* single precision floating point */
 164     mxINT8_CLASS,    /* 8 bit signed integer */
 165     mxUINT8_CLASS,    /* 8 bit unsigned integer */
 166     mxINT16_CLASS,    /* 16 bit signed integer */
 167     mxUINT16_CLASS,    /* 16 bit unsigned integer */
 168     mxINT32_CLASS,    /* 32 bit signed integer */
 169     mxUINT32_CLASS,    /* 32 bit unsigned integer */
 170     mxINT64_CLASS,    /* 64 bit signed integer */
 171     mxUINT64_CLASS,    /* 64 bit unsigned integer */
 172     mxFUNCTION_CLASS            /* Function handle */
 173   } arrayclasstype;
 174
 175 #define FLAG_COMPLEX 0x8
 176 #define FLAG_GLOBAL  0x4
 177 #define FLAG_LOGICAL 0x2
 178
 179 static const QuantumType z2qtype[4] = {GrayQuantum, BlueQuantum, GreenQuantum, RedQuantum};
 180
 181
 182 static void InsertComplexDoubleRow(Image *image,double *p,int y,double MinVal,
 183   double MaxVal,ExceptionInfo *exception)
 184 {
 185
 186   double f;
 187   int x;
 188   register Quantum *q;
 189
 190   if (MinVal == 0)
 191     MinVal = -1;
 192   if (MaxVal == 0)
 193     MaxVal = 1;
 194
 195   q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 196   if (q == (Quantum *) NULL)
 197     return;
 198   for (x = 0; x < (ssize_t) image->columns; x++)
 199   {
 200     if (*p > 0)
 201     {
 202       f = (*p / MaxVal) * (QuantumRange-GetPixelRed(image,q));
 203       if (f + GetPixelRed(image,q) > QuantumRange)
 204         SetPixelRed(image,QuantumRange,q);
 205       else
 206         SetPixelRed(image,GetPixelRed(image,q)+(int) f,q);
 207       if ((int) f / 2.0 > GetPixelGreen(image,q))
 208         {
 209           SetPixelGreen(image,0,q);
 210           SetPixelBlue(image,0,q);
 211         }
 212       else
 213         {
 214           SetPixelBlue(image,GetPixelBlue(image,q)-(int) (f/2.0),q);
 215           SetPixelGreen(image,GetPixelBlue(image,q),q);
 216         }
 217     }
 218     if (*p < 0)
 219     {
 220       f = (*p / MaxVal) * (QuantumRange-GetPixelBlue(image,q));
 221       if (f+GetPixelBlue(image,q) > QuantumRange)
 222         SetPixelBlue(image,QuantumRange,q);
 223       else
 224         SetPixelBlue(image,GetPixelBlue(image,q)+(int) f,q);
 225       if ((int) f / 2.0 > GetPixelGreen(image,q))
 226         {
 227           SetPixelRed(image,0,q);
 228           SetPixelGreen(image,0,q);
 229         }
 230       else
 231         {
 232           SetPixelRed(image,GetPixelRed(image,q)-(int) (f/2.0),q);
 233           SetPixelGreen(image,GetPixelRed(image,q),q);
 234         }
 235     }
 236     p++;
 237     q+=GetPixelChannels(image);
 238   }
 239   if (!SyncAuthenticPixels(image,exception))
 240     return;
 241   return;
 242 }
 243
 244
 245 static void InsertComplexFloatRow(Image *image,float *p,int y,double MinVal,
 246   double MaxVal,ExceptionInfo *exception)
 247 {
 248   double f;
 249   int x;
 250   register Quantum *q;
 251
 252   if (MinVal == 0)
 253     MinVal = -1;
 254   if (MaxVal == 0)
 255     MaxVal = 1;
 256
 257   q = QueueAuthenticPixels(image, 0, y, image->columns, 1,exception);
 258   if (q == (Quantum *) NULL)
 259     return;
 260   for (x = 0; x < (ssize_t) image->columns; x++)
 261   {
 262     if (*p > 0)
 263     {
 264       f = (*p / MaxVal) * (QuantumRange-GetPixelRed(image,q));
 265       if (f+GetPixelRed(image,q) > QuantumRange)
 266         SetPixelRed(image,QuantumRange,q);
 267       else
 268         SetPixelRed(image,GetPixelRed(image,q)+(int) f,q);
 269       if ((int) f / 2.0 > GetPixelGreen(image,q))
 270         {
 271           SetPixelGreen(image,0,q);
 272           SetPixelBlue(image,0,q);
 273         }
 274       else
 275         {
 276           SetPixelBlue(image,GetPixelBlue(image,q)-(int) (f/2.0),q);
 277           SetPixelGreen(image,GetPixelBlue(image,q),q);
 278         }
 279     }
 280     if (*p < 0)
 281     {
 282       f = (*p / MaxVal) * (QuantumRange - GetPixelBlue(image,q));
 283       if (f + GetPixelBlue(image,q) > QuantumRange)
 284         SetPixelBlue(image,QuantumRange,q);
 285       else
 286         SetPixelBlue(image,GetPixelBlue(image,q)+
 287           (int) f,q);
 288       if ((int) f / 2.0 > GetPixelGreen(image,q))
 289         {
 290           SetPixelGreen(image,0,q);
 291           SetPixelRed(image,0,q);
 292         }
 293       else
 294         {
 295           SetPixelRed(image,GetPixelRed(image,q)-(int) (f/2.0),q);
 296           SetPixelGreen(image,GetPixelRed(image,q),q);
 297         }
 298     }
 299     p++;
 300     q++;
 301   }
 302   if (!SyncAuthenticPixels(image,exception))
 303     return;
 304   return;
 305 }
 306
 307
 308 /************** READERS ******************/
 309
 310 /* This function reads one block of floats*/
 311 static void ReadBlobFloatsLSB(Image * image, size_t len, float *data)
 312 {
 313   while (len >= 4)
 314   {
 315     *data++ = ReadBlobFloat(image);
 316     len -= sizeof(float);
 317   }
 318   if (len > 0)
 319     (void) SeekBlob(image, len, SEEK_CUR);
 320 }
 321
 322 static void ReadBlobFloatsMSB(Image * image, size_t len, float *data)
 323 {
 324   while (len >= 4)
 325   {
 326     *data++ = ReadBlobFloat(image);
 327     len -= sizeof(float);
 328   }
 329   if (len > 0)
 330     (void) SeekBlob(image, len, SEEK_CUR);
 331 }
 332
 333 /* This function reads one block of doubles*/
 334 static void ReadBlobDoublesLSB(Image * image, size_t len, double *data)
 335 {
 336   while (len >= 8)
 337   {
 338     *data++ = ReadBlobDouble(image);
 339     len -= sizeof(double);
 340   }
 341   if (len > 0)
 342     (void) SeekBlob(image, len, SEEK_CUR);
 343 }
 344
 345 static void ReadBlobDoublesMSB(Image * image, size_t len, double *data)
 346 {
 347   while (len >= 8)
 348   {
 349     *data++ = ReadBlobDouble(image);
 350     len -= sizeof(double);
 351   }
 352   if (len > 0)
 353     (void) SeekBlob(image, len, SEEK_CUR);
 354 }
 355
 356 /* Calculate minimum and maximum from a given block of data */
 357 static void CalcMinMax(Image *image, int endian_indicator, int SizeX, int SizeY, size_t CellType, unsigned ldblk, void *BImgBuff, double *Min, double *Max)
 358 {
 359 MagickOffsetType filepos;
 360 int i, x;
 361 void (*ReadBlobDoublesXXX)(Image * image, size_t len, double *data);
 362 void (*ReadBlobFloatsXXX)(Image * image, size_t len, float *data);
 363 double *dblrow;
 364 float *fltrow;
 365
 366   if (endian_indicator == LSBEndian)
 367   {
 368     ReadBlobDoublesXXX = ReadBlobDoublesLSB;
 369     ReadBlobFloatsXXX = ReadBlobFloatsLSB;
 370   }
 371   else    /* MI */
 372   {
 373     ReadBlobDoublesXXX = ReadBlobDoublesMSB;
 374     ReadBlobFloatsXXX = ReadBlobFloatsMSB;
 375   }
 376
 377   filepos = TellBlob(image);     /* Please note that file seeking occurs only in the case of doubles */
 378   for (i = 0; i < SizeY; i++)
 379   {
 380     if (CellType==miDOUBLE)
 381     {
 382       ReadBlobDoublesXXX(image, ldblk, (double *)BImgBuff);
 383       dblrow = (double *)BImgBuff;
 384       if (i == 0)
 385       {
 386         *Min = *Max = *dblrow;
 387       }
 388       for (x = 0; x < SizeX; x++)
 389       {
 390         if (*Min > *dblrow)
 391           *Min = *dblrow;
 392         if (*Max < *dblrow)
 393           *Max = *dblrow;
 394         dblrow++;
 395       }
 396     }
 397     if (CellType==miSINGLE)
 398     {
 399       ReadBlobFloatsXXX(image, ldblk, (float *)BImgBuff);
 400       fltrow = (float *)BImgBuff;
 401       if (i == 0)
 402       {
 403         *Min = *Max = *fltrow;
 404       }
 405     for (x = 0; x < (ssize_t) SizeX; x++)
 406       {
 407         if (*Min > *fltrow)
 408           *Min = *fltrow;
 409         if (*Max < *fltrow)
 410           *Max = *fltrow;
 411         fltrow++;
 412       }
 413     }
 414   }
 415   (void) SeekBlob(image, filepos, SEEK_SET);
 416 }
 417
 418
 419 static void FixSignedValues(const Image *image,Quantum *q, int y)
 420 {
 421   while(y-->0)
 422   {
 423      /* Please note that negative values will overflow
 424         Q=8; QuantumRange=255: <0;127> + 127+1 = <128; 255>
 425            <-1;-128> + 127+1 = <0; 127> */
 426     SetPixelRed(image,GetPixelRed(image,q)+QuantumRange/2+1,q);
 427     SetPixelGreen(image,GetPixelGreen(image,q)+QuantumRange/2+1,q);
 428     SetPixelBlue(image,GetPixelBlue(image,q)+QuantumRange/2+1,q);
 429     q++;
 430   }
 431 }
 432
 433
 434 /** Fix whole row of logical/binary data. It means pack it. */
 435 static void FixLogical(unsigned char *Buff,int ldblk)
 436 {
 437 unsigned char mask=128;
 438 unsigned char *BuffL = Buff;
 439 unsigned char val = 0;
 440
 441   while(ldblk-->0)
 442   {
 443     if(*Buff++ != 0)
 444       val |= mask;
 445
 446     mask >>= 1;
 447     if(mask==0)
 448     {
 449       *BuffL++ = val;
 450       val = 0;
 451       mask = 128;
 452     }
 453
 454   }
 455   *BuffL = val;
 456 }
 457
 458 #if defined(MAGICKCORE_ZLIB_DELEGATE)
 459 static voidpf AcquireZIPMemory(voidpf context,unsigned int items,
 460   unsigned int size)
 461 {
 462   (void) context;
 463   return((voidpf) AcquireQuantumMemory(items,size));
 464 }
 465
 466 static void RelinquishZIPMemory(voidpf context,voidpf memory)
 467 {
 468   (void) context;
 469   memory=RelinquishMagickMemory(memory);
 470 }
 471 #endif
 472
 473 #if defined(MAGICKCORE_ZLIB_DELEGATE)
 474 /** This procedure decompreses an image block for a new MATLAB format. */
 475 static Image *decompress_block(Image *orig, unsigned int *Size, ImageInfo *clone_info, ExceptionInfo *exception)
 476 {
 477
 478 Image *image2;
 479 void *cache_block, *decompress_block;
 480 z_stream zip_info;
 481 FILE *mat_file;
 482 size_t magick_size;
 483 size_t extent;
 484 int file;
 485
 486 int status;
 487 int zip_status;
 488 ssize_t TotalSize = 0;
 489
 490   if(clone_info==NULL) return NULL;
 491   if(clone_info->file)    /* Close file opened from previous transaction. */
 492   {
 493     fclose(clone_info->file);
 494     clone_info->file = NULL;
 495     (void) remove_utf8(clone_info->filename);
 496   }
 497
 498   cache_block = AcquireQuantumMemory((size_t)(*Size < 16384) ? *Size: 16384,sizeof(unsigned char *));
 499   if(cache_block==NULL) return NULL;
 500   decompress_block = AcquireQuantumMemory((size_t)(4096),sizeof(unsigned char *));
 501   if(decompress_block==NULL)
 502   {
 503     RelinquishMagickMemory(cache_block);
 504     return NULL;
 505   }
 506
 507   mat_file=0;
 508   file = AcquireUniqueFileResource(clone_info->filename);
 509   if (file != -1)
 510     mat_file = fdopen(file,"w");
 511   if(!mat_file)
 512   {
 513     RelinquishMagickMemory(cache_block);
 514     RelinquishMagickMemory(decompress_block);
 515     (void) LogMagickEvent(CoderEvent,GetMagickModule(),"Cannot create file stream for decompressed image");
 516     return NULL;
 517   }
 518
 519   zip_info.zalloc=AcquireZIPMemory;
 520   zip_info.zfree=RelinquishZIPMemory;
 521   zip_info.opaque = (voidpf) NULL;
 522   zip_status = inflateInit(&zip_info);
 523   if (zip_status != Z_OK)
 524     {
 525       RelinquishMagickMemory(cache_block);
 526       RelinquishMagickMemory(decompress_block);
 527       (void) ThrowMagickException(exception,GetMagickModule(),CorruptImageError,
 528         "UnableToUncompressImage","`%s'",clone_info->filename);
 529       (void) fclose(mat_file);
 530       RelinquishUniqueFileResource(clone_info->filename);
 531       return NULL;
 532     }
 533   /* zip_info.next_out = 8*4;*/
 534
 535   zip_info.avail_in = 0;
 536   zip_info.total_out = 0;
 537   while(*Size>0 && !EOFBlob(orig))
 538   {
 539     magick_size = ReadBlob(orig, (*Size < 16384) ? *Size : 16384, (unsigned char *) cache_block);
 540     zip_info.next_in = (Bytef *) cache_block;
 541     zip_info.avail_in = (uInt) magick_size;
 542
 543     while(zip_info.avail_in>0)
 544     {
 545       zip_info.avail_out = 4096;
 546       zip_info.next_out = (Bytef *) decompress_block;
 547       zip_status = inflate(&zip_info,Z_NO_FLUSH);
 548       if ((zip_status != Z_OK) && (zip_status != Z_STREAM_END))
 549         break;
 550       extent=fwrite(decompress_block, 4096-zip_info.avail_out, 1, mat_file);
 551       (void) extent;
 552       TotalSize += 4096-zip_info.avail_out;
 553
 554       if(zip_status == Z_STREAM_END) goto DblBreak;
 555     }
 556     if ((zip_status != Z_OK) && (zip_status != Z_STREAM_END))
 557       break;
 558
 559     *Size -= (unsigned int) magick_size;
 560   }
 561 DblBreak:
 562
 563   inflateEnd(&zip_info);
 564   (void)fclose(mat_file);
 565   RelinquishMagickMemory(cache_block);
 566   RelinquishMagickMemory(decompress_block);
 567   *Size = TotalSize;
 568
 569   if((clone_info->file=fopen(clone_info->filename,"rb"))==NULL) goto UnlinkFile;
 570   if( (image2 = AcquireImage(clone_info,exception))==NULL ) goto EraseFile;
 571   status = OpenBlob(clone_info,image2,ReadBinaryBlobMode,exception);
 572   if (status == MagickFalse)
 573   {
 574     DeleteImageFromList(&image2);
 575 EraseFile:
 576     fclose(clone_info->file);
 577     clone_info->file = NULL;
 578 UnlinkFile:
 579     RelinquishUniqueFileResource(clone_info->filename);
 580     return NULL;
 581   }
 582
 583   return image2;
 584 }
 585 #endif
 586
 587 static Image *ReadMATImageV4(const ImageInfo *image_info,Image *image,
 588   ExceptionInfo *exception)
 589 {
 590   typedef struct {
 591     unsigned char Type[4];
 592     unsigned int nRows;
 593     unsigned int nCols;
 594     unsigned int imagf;
 595     unsigned int nameLen;
 596   } MAT4_HDR;
 597
 598   long
 599     ldblk;
 600
 601   EndianType
 602     endian;
 603
 604   Image
 605     *rotated_image;
 606
 607   MagickBooleanType
 608     status;
 609
 610   MAT4_HDR
 611     HDR;
 612
 613   QuantumInfo
 614     *quantum_info;
 615
 616   QuantumFormatType
 617     format_type;
 618
 619   register ssize_t
 620     i;
 621
 622   ssize_t
 623     count,
 624     y;
 625
 626   unsigned char
 627     *pixels;
 628
 629   unsigned int
 630     depth;
 631
 632
 633   quantum_info=(QuantumInfo *) NULL;
 634   (void) SeekBlob(image,0,SEEK_SET);
 635   while (EOFBlob(image) == MagickFalse)
 636   {
 637     /*
 638      Object parser loop.
 639     */
 640     ldblk=ReadBlobLSBLong(image);
 641     if ((ldblk > 9999) || (ldblk < 0))
 642       break;
 643     HDR.Type[3]=ldblk % 10; ldblk /= 10;  /* T digit */
 644     HDR.Type[2]=ldblk % 10; ldblk /= 10;  /* P digit */
 645     HDR.Type[1]=ldblk % 10; ldblk /= 10;  /* O digit */
 646     HDR.Type[0]=ldblk;        /* M digit */
 647     if (HDR.Type[3] != 0)
 648       break;  /* Data format */
 649     if (HDR.Type[2] != 0)
 650       break;  /* Always 0 */
 651     if (HDR.Type[0] == 0)
 652       {
 653         HDR.nRows=ReadBlobLSBLong(image);
 654         HDR.nCols=ReadBlobLSBLong(image);
 655         HDR.imagf=ReadBlobLSBLong(image);
 656         HDR.nameLen=ReadBlobLSBLong(image);
 657         endian=LSBEndian;
 658       }
 659     else
 660       {
 661         HDR.nRows=ReadBlobMSBLong(image);
 662         HDR.nCols=ReadBlobMSBLong(image);
 663         HDR.imagf=ReadBlobMSBLong(image);
 664         HDR.nameLen=ReadBlobMSBLong(image);
 665         endian=MSBEndian;
 666       }
 667     if ((HDR.imagf != 0) && (HDR.imagf != 1))
 668       break;
 669     if (HDR.nameLen > 0xFFFF)
 670       return((Image *) NULL);
 671     for (i=0; i < (ssize_t) HDR.nameLen; i++)
 672     {
 673       int
 674         byte;
 675
 676       /*
 677         Skip matrix name.
 678       */
 679       byte=ReadBlobByte(image);
 680       if (byte == EOF)
 681         {
 682           ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
 683             image->filename);
 684           break;
 685         }
 686     }
 687     image->columns=(size_t) HDR.nRows;
 688     image->rows=(size_t) HDR.nCols;
 689     if (image_info->ping != MagickFalse)
 690       {
 691         Swap(image->columns,image->rows);
 692         if(HDR.imagf==1) ldblk *= 2;
 693         SeekBlob(image, HDR.nCols*ldblk, SEEK_CUR);
 694         goto skip_reading_current;
 695       }
 696     status=SetImageExtent(image,image->columns,image->rows,exception);
 697     if (status == MagickFalse)
 698       return((Image *) NULL);
 699     (void) SetImageBackgroundColor(image,exception);
 700     (void) SetImageColorspace(image,GRAYColorspace,exception);
 701     quantum_info=AcquireQuantumInfo(image_info,image);
 702     if (quantum_info == (QuantumInfo *) NULL)
 703       return((Image *) NULL);
 704     switch(HDR.Type[1])
 705     {
 706       case 0:
 707         format_type=FloatingPointQuantumFormat;
 708         depth=64;
 709         break;
 710       case 1:
 711         format_type=FloatingPointQuantumFormat;
 712         depth=32;
 713         break;
 714       case 2:
 715         format_type=UnsignedQuantumFormat;
 716         depth=16;
 717         break;
 718       case 3:
 719         format_type=SignedQuantumFormat;
 720         depth=16;
 721         break;
 722       case 4:
 723         format_type=UnsignedQuantumFormat;
 724         depth=8;
 725         break;
 726       default:
 727         format_type=UnsignedQuantumFormat;
 728         depth=8;
 729         break;
 730     }
 731     image->depth=depth;
 732     if (HDR.Type[0] != 0)
 733       SetQuantumEndian(image,quantum_info,MSBEndian);
 734     status=SetQuantumFormat(image,quantum_info,format_type);
 735     status=SetQuantumDepth(image,quantum_info,depth);
 736     status=SetQuantumEndian(image,quantum_info,endian);
 737     SetQuantumScale(quantum_info,1.0);
 738     pixels=(unsigned char *) GetQuantumPixels(quantum_info);
 739     for (y=0; y < (ssize_t) image->rows; y++)
 740     {
 741       register Quantum
 742         *magick_restrict q;
 743
 744       count=ReadBlob(image,depth/8*image->columns,(char *) pixels);
 745       if (count == -1)
 746         break;
 747       q=QueueAuthenticPixels(image,0,image->rows-y-1,image->columns,1,
 748         exception);
 749       if (q == (Quantum *) NULL)
 750         break;
 751       (void) ImportQuantumPixels(image,(CacheView *) NULL,quantum_info,
 752         GrayQuantum,pixels,exception);
 753       if ((HDR.Type[1] == 2) || (HDR.Type[1] == 3))
 754         FixSignedValues(image,q,(int) image->columns);
 755       if (SyncAuthenticPixels(image,exception) == MagickFalse)
 756         break;
 757       if (image->previous == (Image *) NULL)
 758         {
 759           status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
 760             image->rows);
 761           if (status == MagickFalse)
 762             break;
 763         }
 764     }
 765     if (HDR.imagf == 1)
 766       for (y=0; y < (ssize_t) image->rows; y++)
 767       {
 768         /*
 769           Read complex pixels.
 770         */
 771         count=ReadBlob(image,depth/8*image->columns,(char *) pixels);
 772         if (count == -1)
 773           break;
 774         if (HDR.Type[1] == 0)
 775           InsertComplexDoubleRow(image,(double *) pixels,y,0,0,exception);
 776         else
 777           InsertComplexFloatRow(image,(float *) pixels,y,0,0,exception);
 778       }
 779     if (quantum_info != (QuantumInfo *) NULL)
 780       quantum_info=DestroyQuantumInfo(quantum_info);
 781     if (EOFBlob(image) != MagickFalse)
 782       {
 783         ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
 784           image->filename);
 785         break;
 786       }
 787     rotated_image=RotateImage(image,90.0,exception);
 788     if (rotated_image != (Image *) NULL)
 789       {
 790         rotated_image->page.x=0;
 791         rotated_image->page.y=0;
 792         rotated_image->colors = image->colors;
 793         DestroyBlob(rotated_image);
 794         rotated_image->blob=ReferenceBlob(image->blob);
 795         AppendImageToList(&image,rotated_image);
 796         DeleteImageFromList(&image);
 797       }
 798     /*
 799       Proceed to next image.
 800     */
 801     if (image_info->number_scenes != 0)
 802       if (image->scene >= (image_info->scene+image_info->number_scenes-1))
 803         break;
 804     /*
 805       Allocate next image structure.
 806     */
 807 skip_reading_current:
 808     AcquireNextImage(image_info,image,exception);
 809     if (GetNextImageInList(image) == (Image *) NULL)
 810       {
 811         image=DestroyImageList(image);
 812         return((Image *) NULL);
 813       }
 814     image=SyncNextImageInList(image);
 815     status=SetImageProgress(image,LoadImagesTag,TellBlob(image),
 816       GetBlobSize(image));
 817     if (status == MagickFalse)
 818       break;
 819   }
 820   (void) CloseBlob(image);
 821   return(GetFirstImageInList(image));
 822 }
 823 \f
 824 /*
 825 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 826 %                                                                             %
 827 %                                                                             %
 828 %                                                                             %
 829 %   R e a d M A T L A B i m a g e                                             %
 830 %                                                                             %
 831 %                                                                             %
 832 %                                                                             %
 833 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 834 %
 835 %  ReadMATImage() reads an MAT X image file and returns it.  It
 836 %  allocates the memory necessary for the new Image structure and returns a
 837 %  pointer to the new image.
 838 %
 839 %  The format of the ReadMATImage method is:
 840 %
 841 %      Image *ReadMATImage(const ImageInfo *image_info,ExceptionInfo *exception)
 842 %
 843 %  A description of each parameter follows:
 844 %
 845 %    o image:  Method ReadMATImage returns a pointer to the image after
 846 %      reading. A null image is returned if there is a memory shortage or if
 847 %      the image cannot be read.
 848 %
 849 %    o image_info: Specifies a pointer to a ImageInfo structure.
 850 %
 851 %    o exception: return any errors or warnings in this structure.
 852 %
 853 */
 854 static Image *ReadMATImage(const ImageInfo *image_info,ExceptionInfo *exception)
 855 {
 856   Image *image, *image2=NULL,
 857    *rotated_image;
 858   register Quantum *q;
 859
 860   unsigned int status;
 861   MATHeader MATLAB_HDR;
 862   size_t size;
 863   size_t CellType;
 864   QuantumInfo *quantum_info;
 865   ImageInfo *clone_info;
 866   int i;
 867   ssize_t ldblk;
 868   unsigned char *BImgBuff = NULL;
 869   double MinVal, MaxVal;
 870   unsigned z, z2;
 871   unsigned Frames;
 872   int logging;
 873   int sample_size;
 874   MagickOffsetType filepos=0x80;
 875
 876   unsigned int (*ReadBlobXXXLong)(Image *image);
 877   unsigned short (*ReadBlobXXXShort)(Image *image);
 878   void (*ReadBlobDoublesXXX)(Image * image, size_t len, double *data);
 879   void (*ReadBlobFloatsXXX)(Image * image, size_t len, float *data);
 880
 881
 882   assert(image_info != (const ImageInfo *) NULL);
 883   assert(image_info->signature == MagickCoreSignature);
 884   assert(exception != (ExceptionInfo *) NULL);
 885   assert(exception->signature == MagickCoreSignature);
 886   logging = LogMagickEvent(CoderEvent,GetMagickModule(),"enter");
 887
 888   /*
 889      Open image file.
 890    */
 891   image = AcquireImage(image_info,exception);
 892   image2 = (Image *) NULL;
 893
 894   status = OpenBlob(image_info, image, ReadBinaryBlobMode, exception);
 895   if (status == MagickFalse)
 896     {
 897       image=DestroyImageList(image);
 898       return((Image *) NULL);
 899     }
 900   /*
 901      Read MATLAB image.
 902    */
 903   quantum_info=(QuantumInfo *) NULL;
 904   clone_info=(ImageInfo *) NULL;
 905   if (ReadBlob(image,124,(unsigned char *) &MATLAB_HDR.identific) != 124)
 906     ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 907   if (strncmp(MATLAB_HDR.identific,"MATLAB",6) != 0)
 908     {
 909       image2=ReadMATImageV4(image_info,image,exception);
 910       if (image2  == NULL)
 911         goto MATLAB_KO;
 912       image=image2;
 913       goto END_OF_READING;
 914     }
 915   MATLAB_HDR.Version = ReadBlobLSBShort(image);
 916   if(ReadBlob(image,2,(unsigned char *) &MATLAB_HDR.EndianIndicator) != 2)
 917     ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 918
 919   if (logging)
 920     (void) LogMagickEvent(CoderEvent,GetMagickModule(),"  Endian %c%c",
 921       MATLAB_HDR.EndianIndicator[0],MATLAB_HDR.EndianIndicator[1]);
 922   if (!strncmp(MATLAB_HDR.EndianIndicator, "IM", 2))
 923   {
 924     ReadBlobXXXLong = ReadBlobLSBLong;
 925     ReadBlobXXXShort = ReadBlobLSBShort;
 926     ReadBlobDoublesXXX = ReadBlobDoublesLSB;
 927     ReadBlobFloatsXXX = ReadBlobFloatsLSB;
 928     image->endian = LSBEndian;
 929   }
 930   else if (!strncmp(MATLAB_HDR.EndianIndicator, "MI", 2))
 931   {
 932     ReadBlobXXXLong = ReadBlobMSBLong;
 933     ReadBlobXXXShort = ReadBlobMSBShort;
 934     ReadBlobDoublesXXX = ReadBlobDoublesMSB;
 935     ReadBlobFloatsXXX = ReadBlobFloatsMSB;
 936     image->endian = MSBEndian;
 937   }
 938   else
 939     goto MATLAB_KO;    /* unsupported endian */
 940
 941   if (strncmp(MATLAB_HDR.identific, "MATLAB", 6))
 942     {
 943 MATLAB_KO:
 944       if ((image != image2) && (image2 != (Image *) NULL))
 945         image2=DestroyImage(image2);
 946       if (clone_info != (ImageInfo *) NULL)
 947         clone_info=DestroyImageInfo(clone_info);
 948       ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 949     }
 950
 951   filepos = TellBlob(image);
 952   while(!EOFBlob(image)) /* object parser loop */
 953   {
 954     Frames = 1;
 955     (void) SeekBlob(image,filepos,SEEK_SET);
 956     /* printf("pos=%X\n",TellBlob(image)); */
 957
 958     MATLAB_HDR.DataType = ReadBlobXXXLong(image);
 959     if(EOFBlob(image)) break;
 960     MATLAB_HDR.ObjectSize = ReadBlobXXXLong(image);
 961     if(EOFBlob(image)) break;
 962     if((MagickSizeType) (MATLAB_HDR.ObjectSize+filepos) > GetBlobSize(image))
 963       goto MATLAB_KO;
 964     filepos += MATLAB_HDR.ObjectSize + 4 + 4;
 965
 966     if (clone_info != (ImageInfo *) NULL)
 967       clone_info=DestroyImageInfo(clone_info);
 968     clone_info=CloneImageInfo(image_info);
 969     if ((image != image2) && (image2 != (Image *) NULL))
 970       image2=DestroyImage(image2);
 971     image2 = image;
 972 #if defined(MAGICKCORE_ZLIB_DELEGATE)
 973     if(MATLAB_HDR.DataType == miCOMPRESSED)
 974     {
 975       image2 = decompress_block(image,&MATLAB_HDR.ObjectSize,clone_info,exception);
 976       if(image2==NULL) continue;
 977       MATLAB_HDR.DataType = ReadBlobXXXLong(image2); /* replace compressed object type. */
 978     }
 979 #endif
 980
 981     if (MATLAB_HDR.DataType!=miMATRIX)
 982       {
 983         clone_info=DestroyImageInfo(clone_info);
 984         continue;  /* skip another objects. */
 985       }
 986
 987     MATLAB_HDR.unknown1 = ReadBlobXXXLong(image2);
 988     MATLAB_HDR.unknown2 = ReadBlobXXXLong(image2);
 989
 990     MATLAB_HDR.unknown5 = ReadBlobXXXLong(image2);
 991     MATLAB_HDR.StructureClass = MATLAB_HDR.unknown5 & 0xFF;
 992     MATLAB_HDR.StructureFlag = (MATLAB_HDR.unknown5>>8) & 0xFF;
 993
 994     MATLAB_HDR.unknown3 = ReadBlobXXXLong(image2);
 995     if(image!=image2)
 996       MATLAB_HDR.unknown4 = ReadBlobXXXLong(image2);  /* ??? don't understand why ?? */
 997     MATLAB_HDR.unknown4 = ReadBlobXXXLong(image2);
 998     MATLAB_HDR.DimFlag = ReadBlobXXXLong(image2);
 999     MATLAB_HDR.SizeX = ReadBlobXXXLong(image2);
1000     MATLAB_HDR.SizeY = ReadBlobXXXLong(image2);
1001
1002
1003     switch(MATLAB_HDR.DimFlag)
1004     {
1005       case  8: z2=z=1; break;      /* 2D matrix*/
1006       case 12: z2=z = ReadBlobXXXLong(image2);  /* 3D matrix RGB*/
1007            (void) ReadBlobXXXLong(image2);
1008          if(z!=3)
1009            {
1010              if (clone_info != (ImageInfo *) NULL)
1011                clone_info=DestroyImageInfo(clone_info);
1012              if ((image != image2) && (image2 != (Image *) NULL))
1013                image2=DestroyImage(image2);
1014              ThrowReaderException(CoderError,
1015                "MultidimensionalMatricesAreNotSupported");
1016            }
1017          break;
1018       case 16: z2=z = ReadBlobXXXLong(image2);  /* 4D matrix animation */
1019          if(z!=3 && z!=1)
1020            {
1021              if (clone_info != (ImageInfo *) NULL)
1022                clone_info=DestroyImageInfo(clone_info);
1023              if ((image != image2) && (image2 != (Image *) NULL))
1024                image2=DestroyImage(image2);
1025              ThrowReaderException(CoderError,
1026                "MultidimensionalMatricesAreNotSupported");
1027            }
1028          Frames = ReadBlobXXXLong(image2);
1029          if (Frames == 0)
1030            {
1031              if (clone_info != (ImageInfo *) NULL)
1032                clone_info=DestroyImageInfo(clone_info);
1033              if ((image != image2) && (image2 != (Image *) NULL))
1034                image2=DestroyImage(image2);
1035              ThrowReaderException(CorruptImageError,"ImproperImageHeader");
1036            }
1037          break;
1038       default:
1039         if (clone_info != (ImageInfo *) NULL)
1040           clone_info=DestroyImageInfo(clone_info);
1041         if ((image != image2) && (image2 != (Image *) NULL))
1042           image2=DestroyImage(image2);
1043         ThrowReaderException(CoderError, "MultidimensionalMatricesAreNotSupported");
1044     }
1045
1046     MATLAB_HDR.Flag1 = ReadBlobXXXShort(image2);
1047     MATLAB_HDR.NameFlag = ReadBlobXXXShort(image2);
1048
1049     if (logging) (void)LogMagickEvent(CoderEvent,GetMagickModule(),
1050           "MATLAB_HDR.StructureClass %d",MATLAB_HDR.StructureClass);
1051     if (MATLAB_HDR.StructureClass != mxCHAR_CLASS &&
1052         MATLAB_HDR.StructureClass != mxSINGLE_CLASS &&    /* float + complex float */
1053         MATLAB_HDR.StructureClass != mxDOUBLE_CLASS &&    /* double + complex double */
1054         MATLAB_HDR.StructureClass != mxINT8_CLASS &&
1055         MATLAB_HDR.StructureClass != mxUINT8_CLASS &&    /* uint8 + uint8 3D */
1056         MATLAB_HDR.StructureClass != mxINT16_CLASS &&
1057         MATLAB_HDR.StructureClass != mxUINT16_CLASS &&    /* uint16 + uint16 3D */
1058         MATLAB_HDR.StructureClass != mxINT32_CLASS &&
1059         MATLAB_HDR.StructureClass != mxUINT32_CLASS &&    /* uint32 + uint32 3D */
1060         MATLAB_HDR.StructureClass != mxINT64_CLASS &&
1061         MATLAB_HDR.StructureClass != mxUINT64_CLASS)    /* uint64 + uint64 3D */
1062       {
1063         if ((image2 != (Image*) NULL) && (image2 != (Image *) image))
1064           {
1065             CloseBlob(image2);
1066             DeleteImageFromList(&image2);
1067           }
1068         if (clone_info != (ImageInfo *) NULL)
1069           DestroyImageInfo(clone_info);
1070         ThrowReaderException(CoderError,"UnsupportedCellTypeInTheMatrix");
1071       }
1072
1073     switch (MATLAB_HDR.NameFlag)
1074     {
1075       case 0:
1076         size = ReadBlobXXXLong(image2);  /* Object name string size */
1077         size = 4 * (ssize_t) ((size + 3 + 1) / 4);
1078         (void) SeekBlob(image2, size, SEEK_CUR);
1079         break;
1080       case 1:
1081       case 2:
1082       case 3:
1083       case 4:
1084         (void) ReadBlob(image2, 4, (unsigned char *) &size); /* Object name string */
1085         break;
1086       default:
1087         goto MATLAB_KO;
1088     }
1089
1090     CellType = ReadBlobXXXLong(image2);    /* Additional object type */
1091     if (logging)
1092       (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1093         "MATLAB_HDR.CellType: %.20g",(double) CellType);
1094
1095     (void) ReadBlob(image2, 4, (unsigned char *) &size);     /* data size */
1096
1097     NEXT_FRAME:
1098     switch (CellType)
1099     {
1100       case miINT8:
1101       case miUINT8:
1102         sample_size = 8;
1103         if(MATLAB_HDR.StructureFlag & FLAG_LOGICAL)
1104           image->depth = 1;
1105         else
1106           image->depth = 8;         /* Byte type cell */
1107         ldblk = (ssize_t) MATLAB_HDR.SizeX;
1108         break;
1109       case miINT16:
1110       case miUINT16:
1111         sample_size = 16;
1112         image->depth = 16;        /* Word type cell */
1113         ldblk = (ssize_t) (2 * MATLAB_HDR.SizeX);
1114         break;
1115       case miINT32:
1116       case miUINT32:
1117         sample_size = 32;
1118         image->depth = 32;        /* Dword type cell */
1119         ldblk = (ssize_t) (4 * MATLAB_HDR.SizeX);
1120         break;
1121       case miINT64:
1122       case miUINT64:
1123         sample_size = 64;
1124         image->depth = 64;        /* Qword type cell */
1125         ldblk = (ssize_t) (8 * MATLAB_HDR.SizeX);
1126         break;
1127       case miSINGLE:
1128         sample_size = 32;
1129         image->depth = 32;        /* double type cell */
1130         (void) SetImageOption(clone_info,"quantum:format","floating-point");
1131         if (MATLAB_HDR.StructureFlag & FLAG_COMPLEX)
1132   {              /* complex float type cell */
1133   }
1134         ldblk = (ssize_t) (4 * MATLAB_HDR.SizeX);
1135         break;
1136       case miDOUBLE:
1137         sample_size = 64;
1138         image->depth = 64;        /* double type cell */
1139         (void) SetImageOption(clone_info,"quantum:format","floating-point");
1140 DisableMSCWarning(4127)
1141         if (sizeof(double) != 8)
1142 RestoreMSCWarning
1143           ThrowReaderException(CoderError, "IncompatibleSizeOfDouble");
1144         if (MATLAB_HDR.StructureFlag & FLAG_COMPLEX)
1145   {                         /* complex double type cell */
1146   }
1147         ldblk = (ssize_t) (8 * MATLAB_HDR.SizeX);
1148         break;
1149       default:
1150         if ((image != image2) && (image2 != (Image *) NULL))
1151           image2=DestroyImage(image2);
1152         if (clone_info)
1153           clone_info=DestroyImageInfo(clone_info);
1154         ThrowReaderException(CoderError, "UnsupportedCellTypeInTheMatrix");
1155     }
1156     (void) sample_size;
1157     image->columns = MATLAB_HDR.SizeX;
1158     image->rows = MATLAB_HDR.SizeY;
1159     image->colors = GetQuantumRange(image->depth);
1160     if (image->columns == 0 || image->rows == 0)
1161       goto MATLAB_KO;
1162     if((unsigned long)ldblk*MATLAB_HDR.SizeY > MATLAB_HDR.ObjectSize)
1163       goto MATLAB_KO;
1164     /* Image is gray when no complex flag is set and 2D Matrix */
1165     if ((MATLAB_HDR.DimFlag == 8) &&
1166         ((MATLAB_HDR.StructureFlag & FLAG_COMPLEX) == 0))
1167       {
1168         image->type=GrayscaleType;
1169         SetImageColorspace(image,GRAYColorspace,exception);
1170       }
1171
1172
1173     /*
1174       If ping is true, then only set image size and colors without
1175       reading any image data.
1176     */
1177     if (image_info->ping)
1178     {
1179       size_t temp = image->columns;
1180       image->columns = image->rows;
1181       image->rows = temp;
1182       goto done_reading; /* !!!!!! BAD  !!!! */
1183     }
1184     status=SetImageExtent(image,image->columns,image->rows,exception);
1185     if (status == MagickFalse)
1186       {
1187         if ((image != image2) && (image2 != (Image *) NULL))
1188           image2=DestroyImage(image2);
1189         return(DestroyImageList(image));
1190       }
1191     (void) SetImageBackgroundColor(image,exception);
1192     quantum_info=AcquireQuantumInfo(clone_info,image);
1193     if (quantum_info == (QuantumInfo *) NULL)
1194       ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
1195
1196   /* ----- Load raster data ----- */
1197     BImgBuff = (unsigned char *) AcquireQuantumMemory((size_t) (ldblk),sizeof(double));    /* Ldblk was set in the check phase */
1198     if (BImgBuff == NULL)
1199       ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
1200     (void) memset(BImgBuff,0,ldblk*sizeof(double));
1201
1202     MinVal = 0;
1203     MaxVal = 0;
1204     if (CellType==miDOUBLE || CellType==miSINGLE)        /* Find Min and Max Values for floats */
1205     {
1206       CalcMinMax(image2, image_info->endian,  MATLAB_HDR.SizeX, MATLAB_HDR.SizeY, CellType, ldblk, BImgBuff, &quantum_info->minimum, &quantum_info->maximum);
1207     }
1208
1209     /* Main loop for reading all scanlines */
1210     if(z==1) z=0; /* read grey scanlines */
1211     /* else read color scanlines */
1212     do
1213     {
1214       for (i = 0; i < (ssize_t) MATLAB_HDR.SizeY; i++)
1215       {
1216         q=GetAuthenticPixels(image,0,MATLAB_HDR.SizeY-i-1,image->columns,1,exception);
1217         if (q == (Quantum *) NULL)
1218   {
1219     if (logging) (void)LogMagickEvent(CoderEvent,GetMagickModule(),
1220               "  MAT set image pixels returns unexpected NULL on a row %u.", (unsigned)(MATLAB_HDR.SizeY-i-1));
1221     goto done_reading;    /* Skip image rotation, when cannot set image pixels    */
1222   }
1223         if(ReadBlob(image2,ldblk,(unsigned char *)BImgBuff) != (ssize_t) ldblk)
1224   {
1225     if (logging) (void)LogMagickEvent(CoderEvent,GetMagickModule(),
1226              "  MAT cannot read scanrow %u from a file.", (unsigned)(MATLAB_HDR.SizeY-i-1));
1227     goto ExitLoop;
1228   }
1229         if((CellType==miINT8 || CellType==miUINT8) && (MATLAB_HDR.StructureFlag & FLAG_LOGICAL))
1230         {
1231           FixLogical((unsigned char *)BImgBuff,ldblk);
1232           if(ImportQuantumPixels(image,(CacheView *) NULL,quantum_info,z2qtype[z],BImgBuff,exception) <= 0)
1233     {
1234 ImportQuantumPixelsFailed:
1235       if (logging) (void)LogMagickEvent(CoderEvent,GetMagickModule(),
1236               "  MAT failed to ImportQuantumPixels for a row %u", (unsigned)(MATLAB_HDR.SizeY-i-1));
1237       break;
1238     }
1239         }
1240         else
1241         {
1242           if(ImportQuantumPixels(image,(CacheView *) NULL,quantum_info,z2qtype[z],BImgBuff,exception) <= 0)
1243       goto ImportQuantumPixelsFailed;
1244
1245
1246           if (z<=1 &&       /* fix only during a last pass z==0 || z==1 */
1247           (CellType==miINT8 || CellType==miINT16 || CellType==miINT32 || CellType==miINT64))
1248       FixSignedValues(image,q,MATLAB_HDR.SizeX);
1249         }
1250
1251         if (!SyncAuthenticPixels(image,exception))
1252   {
1253     if (logging) (void)LogMagickEvent(CoderEvent,GetMagickModule(),
1254             "  MAT failed to sync image pixels for a row %u", (unsigned)(MATLAB_HDR.SizeY-i-1));
1255     goto ExitLoop;
1256   }
1257       }
1258     } while(z-- >= 2);
1259 ExitLoop:
1260
1261
1262     /* Read complex part of numbers here */
1263     if (MATLAB_HDR.StructureFlag & FLAG_COMPLEX)
1264     {        /* Find Min and Max Values for complex parts of floats */
1265       CellType = ReadBlobXXXLong(image2);    /* Additional object type */
1266       i = ReadBlobXXXLong(image2);           /* size of a complex part - toss away*/
1267
1268       if (CellType==miDOUBLE || CellType==miSINGLE)
1269       {
1270         CalcMinMax(image2,  image_info->endian, MATLAB_HDR.SizeX, MATLAB_HDR.SizeY, CellType, ldblk, BImgBuff, &MinVal, &MaxVal);
1271       }
1272
1273       if (CellType==miDOUBLE)
1274         for (i = 0; i < (ssize_t) MATLAB_HDR.SizeY; i++)
1275   {
1276           ReadBlobDoublesXXX(image2, ldblk, (double *)BImgBuff);
1277           InsertComplexDoubleRow(image, (double *)BImgBuff, i, MinVal, MaxVal,
1278             exception);
1279   }
1280
1281       if (CellType==miSINGLE)
1282         for (i = 0; i < (ssize_t) MATLAB_HDR.SizeY; i++)
1283   {
1284           ReadBlobFloatsXXX(image2, ldblk, (float *)BImgBuff);
1285           InsertComplexFloatRow(image,(float *)BImgBuff,i,MinVal,MaxVal,
1286             exception);
1287   }
1288     }
1289
1290       /* Image is gray when no complex flag is set and 2D Matrix AGAIN!!! */
1291     if ((MATLAB_HDR.DimFlag == 8) &&
1292         ((MATLAB_HDR.StructureFlag & FLAG_COMPLEX) == 0))
1293       image->type=GrayscaleType;
1294     if (image->depth == 1)
1295       image->type=BilevelType;
1296
1297     if(image2==image)
1298         image2 = NULL;    /* Remove shadow copy to an image before rotation. */
1299
1300       /*  Rotate image. */
1301     rotated_image = RotateImage(image, 90.0, exception);
1302     if (rotated_image != (Image *) NULL)
1303     {
1304         /* Remove page offsets added by RotateImage */
1305       rotated_image->page.x=0;
1306       rotated_image->page.y=0;
1307       rotated_image->colors = image->colors;
1308       DestroyBlob(rotated_image);
1309       rotated_image->blob=ReferenceBlob(image->blob);
1310       AppendImageToList(&image,rotated_image);
1311       DeleteImageFromList(&image);
1312     }
1313
1314 done_reading:
1315
1316     if(image2!=NULL)
1317       if(image2!=image)
1318       {
1319         DeleteImageFromList(&image2);
1320   if(clone_info)
1321   {
1322           if(clone_info->file)
1323     {
1324             fclose(clone_info->file);
1325             clone_info->file = NULL;
1326             (void) remove_utf8(clone_info->filename);
1327     }
1328         }
1329       }
1330
1331       /* Allocate next image structure. */
1332     AcquireNextImage(image_info,image,exception);
1333     if (image->next == (Image *) NULL) break;
1334     image=SyncNextImageInList(image);
1335     image->columns=image->rows=0;
1336     image->colors=0;
1337
1338       /* row scan buffer is no longer needed */
1339     RelinquishMagickMemory(BImgBuff);
1340     BImgBuff = NULL;
1341     if (quantum_info != (QuantumInfo *) NULL)
1342       quantum_info=DestroyQuantumInfo(quantum_info);
1343
1344     if(--Frames>0)
1345     {
1346       z = z2;
1347       if(image2==NULL) image2 = image;
1348       goto NEXT_FRAME;
1349     }
1350     if ((image2!=NULL) && (image2!=image))   /* Does shadow temporary decompressed image exist? */
1351       {
1352 /*  CloseBlob(image2); */
1353         DeleteImageFromList(&image2);
1354         if(clone_info)
1355         {
1356           if(clone_info->file)
1357           {
1358             fclose(clone_info->file);
1359             clone_info->file = NULL;
1360             (void) remove_utf8(clone_info->filename);
1361           }
1362         }
1363         }
1364
1365     if (clone_info)
1366       clone_info=DestroyImageInfo(clone_info);
1367   }
1368
1369   RelinquishMagickMemory(BImgBuff);
1370   if (quantum_info != (QuantumInfo *) NULL)
1371     quantum_info=DestroyQuantumInfo(quantum_info);
1372 END_OF_READING:
1373   CloseBlob(image);
1374
1375
1376   {
1377     Image *p;
1378     ssize_t scene=0;
1379
1380     /*
1381       Rewind list, removing any empty images while rewinding.
1382     */
1383     p=image;
1384     image=NULL;
1385     while (p != (Image *) NULL)
1386       {
1387         Image *tmp=p;
1388         if ((p->rows == 0) || (p->columns == 0)) {
1389           p=p->previous;
1390           if (tmp == image2)
1391             image2=(Image *) NULL;
1392           DeleteImageFromList(&tmp);
1393         } else {
1394           image=p;
1395           p=p->previous;
1396         }
1397       }
1398
1399     /*
1400       Fix scene numbers
1401     */
1402     for (p=image; p != (Image *) NULL; p=p->next)
1403       p->scene=scene++;
1404   }
1405
1406   if(clone_info != NULL)  /* cleanup garbage file from compression */
1407   {
1408     if(clone_info->file)
1409     {
1410       fclose(clone_info->file);
1411       clone_info->file = NULL;
1412       (void) remove_utf8(clone_info->filename);
1413     }
1414     DestroyImageInfo(clone_info);
1415     clone_info = NULL;
1416   }
1417   if (logging) (void)LogMagickEvent(CoderEvent,GetMagickModule(),"return");
1418   if ((image != image2) && (image2 != (Image *) NULL))
1419     image2=DestroyImage(image2);
1420   if (image == (Image *) NULL)
1421     ThrowReaderException(CorruptImageError,"ImproperImageHeader")
1422   return(image);
1423 }
1424 \f
1425 /*
1426 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1427 %                                                                             %
1428 %                                                                             %
1429 %                                                                             %
1430 %   R e g i s t e r M A T I m a g e                                           %
1431 %                                                                             %
1432 %                                                                             %
1433 %                                                                             %
1434 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1435 %
1436 %  Method RegisterMATImage adds attributes for the MAT image format to
1437 %  the list of supported formats.  The attributes include the image format
1438 %  tag, a method to read and/or write the format, whether the format
1439 %  supports the saving of more than one frame to the same file or blob,
1440 %  whether the format supports native in-memory I/O, and a brief
1441 %  description of the format.
1442 %
1443 %  The format of the RegisterMATImage method is:
1444 %
1445 %      size_t RegisterMATImage(void)
1446 %
1447 */
1448 ModuleExport size_t RegisterMATImage(void)
1449 {
1450   MagickInfo
1451     *entry;
1452
1453   entry=AcquireMagickInfo("MAT","MAT","MATLAB level 5 image format");
1454   entry->decoder=(DecodeImageHandler *) ReadMATImage;
1455   entry->encoder=(EncodeImageHandler *) WriteMATImage;
1456   entry->flags^=CoderBlobSupportFlag;
1457   entry->flags|=CoderDecoderSeekableStreamFlag;
1458   (void) RegisterMagickInfo(entry);
1459   return(MagickImageCoderSignature);
1460 }
1461 \f
1462 /*
1463 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1464 %                                                                             %
1465 %                                                                             %
1466 %                                                                             %
1467 %   U n r e g i s t e r M A T I m a g e                                       %
1468 %                                                                             %
1469 %                                                                             %
1470 %                                                                             %
1471 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1472 %
1473 %  Method UnregisterMATImage removes format registrations made by the
1474 %  MAT module from the list of supported formats.
1475 %
1476 %  The format of the UnregisterMATImage method is:
1477 %
1478 %      UnregisterMATImage(void)
1479 %
1480 */
1481 ModuleExport void UnregisterMATImage(void)
1482 {
1483   (void) UnregisterMagickInfo("MAT");
1484 }
1485 \f
1486 /*
1487 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1488 %                                                                             %
1489 %                                                                             %
1490 %                                                                             %
1491 %   W r i t e M A T L A B I m a g e                                           %
1492 %                                                                             %
1493 %                                                                             %
1494 %                                                                             %
1495 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1496 %
1497 %  Function WriteMATImage writes an Matlab matrix to a file.
1498 %
1499 %  The format of the WriteMATImage method is:
1500 %
1501 %      MagickBooleanType WriteMATImage(const ImageInfo *image_info,
1502 %        Image *image,ExceptionInfo *exception)
1503 %
1504 %  A description of each parameter follows.
1505 %
1506 %    o image_info: Specifies a pointer to a ImageInfo structure.
1507 %
1508 %    o image:  A pointer to an Image structure.
1509 %
1510 %    o exception: return any errors or warnings in this structure.
1511 %
1512 */
1513 static MagickBooleanType WriteMATImage(const ImageInfo *image_info,Image *image,
1514   ExceptionInfo *exception)
1515 {
1516   char
1517     MATLAB_HDR[0x80];
1518
1519   MagickBooleanType
1520     status;
1521
1522   MagickOffsetType
1523     scene;
1524
1525   struct tm
1526     local_time;
1527
1528   time_t
1529     current_time;
1530
1531   /*
1532     Open output image file.
1533   */
1534   assert(image_info != (const ImageInfo *) NULL);
1535   assert(image_info->signature == MagickCoreSignature);
1536   assert(image != (Image *) NULL);
1537   assert(image->signature == MagickCoreSignature);
1538   (void) LogMagickEvent(CoderEvent,GetMagickModule(),"enter MAT");
1539   assert(exception != (ExceptionInfo *) NULL);
1540   assert(exception->signature == MagickCoreSignature);
1541   status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
1542   if (status == MagickFalse)
1543     return(MagickFalse);
1544   image->depth=8;
1545
1546   current_time=time((time_t *) NULL);
1547 #if defined(MAGICKCORE_HAVE_LOCALTIME_R)
1548   (void) localtime_r(&current_time,&local_time);
1549 #else
1550   (void) memcpy(&local_time,localtime(&current_time),sizeof(local_time));
1551 #endif
1552   (void) memset(MATLAB_HDR,' ',MagickMin(sizeof(MATLAB_HDR),124));
1553   FormatLocaleString(MATLAB_HDR,sizeof(MATLAB_HDR),
1554     "MATLAB 5.0 MAT-file, Platform: %s, Created on: %s %s %2d %2d:%2d:%2d %d",
1555     OsDesc,DayOfWTab[local_time.tm_wday],MonthsTab[local_time.tm_mon],
1556     local_time.tm_mday,local_time.tm_hour,local_time.tm_min,
1557     local_time.tm_sec,local_time.tm_year+1900);
1558   MATLAB_HDR[0x7C]=0;
1559   MATLAB_HDR[0x7D]=1;
1560   MATLAB_HDR[0x7E]='I';
1561   MATLAB_HDR[0x7F]='M';
1562   (void) WriteBlob(image,sizeof(MATLAB_HDR),(unsigned char *) MATLAB_HDR);
1563   scene=0;
1564   do
1565   {
1566     char
1567       padding;
1568
1569     MagickBooleanType
1570       is_gray;
1571
1572     QuantumInfo
1573       *quantum_info;
1574
1575     size_t
1576       data_size;
1577
1578     unsigned char
1579       *pixels;
1580
1581     unsigned int
1582       z;
1583
1584     (void) TransformImageColorspace(image,sRGBColorspace,exception);
1585     is_gray=SetImageGray(image,exception);
1586     z=(is_gray != MagickFalse) ? 0 : 3;
1587
1588     /*
1589       Store MAT header.
1590     */
1591     data_size = image->rows * image->columns;
1592     if (is_gray == MagickFalse)
1593       data_size*=3;
1594     padding=((unsigned char)(data_size-1) & 0x7) ^ 0x7;
1595
1596     (void) WriteBlobLSBLong(image,miMATRIX);
1597     (void) WriteBlobLSBLong(image,(unsigned int) data_size+padding+
1598       ((is_gray != MagickFalse) ? 48 : 56));
1599     (void) WriteBlobLSBLong(image,0x6); /* 0x88 */
1600     (void) WriteBlobLSBLong(image,0x8); /* 0x8C */
1601     (void) WriteBlobLSBLong(image,0x6); /* 0x90 */
1602     (void) WriteBlobLSBLong(image,0);
1603     (void) WriteBlobLSBLong(image,0x5); /* 0x98 */
1604     (void) WriteBlobLSBLong(image,(is_gray != MagickFalse) ? 0x8 : 0xC); /* 0x9C - DimFlag */
1605     (void) WriteBlobLSBLong(image,(unsigned int) image->rows);    /* x: 0xA0 */
1606     (void) WriteBlobLSBLong(image,(unsigned int) image->columns); /* y: 0xA4 */
1607     if (is_gray == MagickFalse)
1608       {
1609         (void) WriteBlobLSBLong(image,3); /* z: 0xA8 */
1610         (void) WriteBlobLSBLong(image,0);
1611       }
1612     (void) WriteBlobLSBShort(image,1);  /* 0xB0 */
1613     (void) WriteBlobLSBShort(image,1);  /* 0xB2 */
1614     (void) WriteBlobLSBLong(image,'M'); /* 0xB4 */
1615     (void) WriteBlobLSBLong(image,0x2); /* 0xB8 */
1616     (void) WriteBlobLSBLong(image,(unsigned int) data_size); /* 0xBC */
1617
1618     /*
1619       Store image data.
1620     */
1621     quantum_info=AcquireQuantumInfo(image_info,image);
1622     if (quantum_info == (QuantumInfo *) NULL)
1623       ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
1624     pixels=(unsigned char *) GetQuantumPixels(quantum_info);
1625     do
1626     {
1627       const Quantum
1628         *p;
1629
1630       ssize_t
1631         y;
1632
1633       for (y=0; y < (ssize_t)image->columns; y++)
1634       {
1635         p=GetVirtualPixels(image,y,0,1,image->rows,exception);
1636         if (p == (const Quantum *) NULL)
1637           break;
1638         (void) ExportQuantumPixels(image,(CacheView *) NULL,quantum_info,
1639           z2qtype[z],pixels,exception);
1640         (void) WriteBlob(image,image->rows,pixels);
1641       }
1642       if (SyncAuthenticPixels(image,exception) == MagickFalse)
1643         break;
1644     } while (z-- >= 2);
1645     while (padding-- > 0)
1646       (void) WriteBlobByte(image,0);
1647     quantum_info=DestroyQuantumInfo(quantum_info);
1648     if (GetNextImageInList(image) == (Image *) NULL)
1649       break;
1650     image=SyncNextImageInList(image);
1651     status=SetImageProgress(image,SaveImagesTag,scene++,
1652       GetImageListLength(image));
1653     if (status == MagickFalse)
1654       break;
1655   } while (image_info->adjoin != MagickFalse);
1656   (void) CloseBlob(image);
1657   return(status);
1658 }