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 long 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 *DecompressBlock(Image *orig, MagickOffsetType Size, ImageInfo *clone_info, ExceptionInfo *exception)
 476 {
 477
 478 Image *image2;
 479 void *CacheBlock, *DecompressBlock;
 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
 489   if(clone_info==NULL) return NULL;
 490   if(clone_info->file)    /* Close file opened from previous transaction. */
 491   {
 492     fclose(clone_info->file);
 493     clone_info->file = NULL;
 494     (void) remove_utf8(clone_info->filename);
 495   }
 496
 497   CacheBlock = AcquireQuantumMemory((size_t)((Size<16384)?Size:16384),sizeof(unsigned char *));
 498   if(CacheBlock==NULL) return NULL;
 499   DecompressBlock = AcquireQuantumMemory((size_t)(4096),sizeof(unsigned char *));
 500   if(DecompressBlock==NULL)
 501   {
 502     RelinquishMagickMemory(CacheBlock);
 503     return NULL;
 504   }
 505
 506   mat_file=0;
 507   file = AcquireUniqueFileResource(clone_info->filename);
 508   if (file != -1)
 509     mat_file = fdopen(file,"w");
 510   if(!mat_file)
 511   {
 512     RelinquishMagickMemory(CacheBlock);
 513     RelinquishMagickMemory(DecompressBlock);
 514     (void) LogMagickEvent(CoderEvent,GetMagickModule(),"Cannot create file stream for decompressed image");
 515     return NULL;
 516   }
 517
 518   zip_info.zalloc=AcquireZIPMemory;
 519   zip_info.zfree=RelinquishZIPMemory;
 520   zip_info.opaque = (voidpf) NULL;
 521   zip_status = inflateInit(&zip_info);
 522   if (zip_status != Z_OK)
 523     {
 524       RelinquishMagickMemory(CacheBlock);
 525       RelinquishMagickMemory(DecompressBlock);
 526       (void) ThrowMagickException(exception,GetMagickModule(),CorruptImageError,
 527         "UnableToUncompressImage","`%s'",clone_info->filename);
 528       (void) fclose(mat_file);
 529       RelinquishUniqueFileResource(clone_info->filename);
 530       return NULL;
 531     }
 532   /* zip_info.next_out = 8*4;*/
 533
 534   zip_info.avail_in = 0;
 535   zip_info.total_out = 0;
 536   while(Size>0 && !EOFBlob(orig))
 537   {
 538     magick_size = ReadBlob(orig, (Size<16384)?Size:16384, (unsigned char *) CacheBlock);
 539     zip_info.next_in = (Bytef *) CacheBlock;
 540     zip_info.avail_in = (uInt) magick_size;
 541
 542     while(zip_info.avail_in>0)
 543     {
 544       zip_info.avail_out = 4096;
 545       zip_info.next_out = (Bytef *) DecompressBlock;
 546       zip_status = inflate(&zip_info,Z_NO_FLUSH);
 547       if ((zip_status != Z_OK) && (zip_status != Z_STREAM_END))
 548         break;
 549       extent=fwrite(DecompressBlock, 4096-zip_info.avail_out, 1, mat_file);
 550       (void) extent;
 551
 552       if(zip_status == Z_STREAM_END) goto DblBreak;
 553     }
 554     if ((zip_status != Z_OK) && (zip_status != Z_STREAM_END))
 555       break;
 556
 557     Size -= magick_size;
 558   }
 559 DblBreak:
 560
 561   inflateEnd(&zip_info);
 562   (void)fclose(mat_file);
 563   RelinquishMagickMemory(CacheBlock);
 564   RelinquishMagickMemory(DecompressBlock);
 565
 566   if((clone_info->file=fopen(clone_info->filename,"rb"))==NULL) goto UnlinkFile;
 567   if( (image2 = AcquireImage(clone_info,exception))==NULL ) goto EraseFile;
 568   status = OpenBlob(clone_info,image2,ReadBinaryBlobMode,exception);
 569   if (status == MagickFalse)
 570   {
 571     DeleteImageFromList(&image2);
 572 EraseFile:
 573     fclose(clone_info->file);
 574     clone_info->file = NULL;
 575 UnlinkFile:
 576     RelinquishUniqueFileResource(clone_info->filename);
 577     return NULL;
 578   }
 579
 580   return image2;
 581 }
 582 #endif
 583
 584 static Image *ReadMATImageV4(const ImageInfo *image_info,Image *image,
 585   ExceptionInfo *exception)
 586 {
 587   typedef struct {
 588     unsigned char Type[4];
 589     unsigned int nRows;
 590     unsigned int nCols;
 591     unsigned int imagf;
 592     unsigned int nameLen;
 593   } MAT4_HDR;
 594
 595   long
 596     ldblk;
 597
 598   EndianType
 599     endian;
 600
 601   Image
 602     *rotate_image;
 603
 604   MagickBooleanType
 605     status;
 606
 607   MAT4_HDR
 608     HDR;
 609
 610   QuantumInfo
 611     *quantum_info;
 612
 613   QuantumFormatType
 614     format_type;
 615
 616   register ssize_t
 617     i;
 618
 619   ssize_t
 620     count,
 621     y;
 622
 623   unsigned char
 624     *pixels;
 625
 626   unsigned int
 627     depth;
 628
 629
 630   (void) SeekBlob(image,0,SEEK_SET);
 631   while (EOFBlob(image) != MagickFalse)
 632   {
 633     /*
 634      Object parser loop.
 635     */
 636     ldblk=ReadBlobLSBLong(image);
 637     if ((ldblk > 9999) || (ldblk < 0))
 638       break;
 639     HDR.Type[3]=ldblk % 10; ldblk /= 10;  /* T digit */
 640     HDR.Type[2]=ldblk % 10; ldblk /= 10;  /* P digit */
 641     HDR.Type[1]=ldblk % 10; ldblk /= 10;  /* O digit */
 642     HDR.Type[0]=ldblk;        /* M digit */
 643     if (HDR.Type[3] != 0)
 644       break;  /* Data format */
 645     if (HDR.Type[2] != 0)
 646       break;  /* Always 0 */
 647     if (HDR.Type[0] == 0)
 648       {
 649         HDR.nRows=ReadBlobLSBLong(image);
 650         HDR.nCols=ReadBlobLSBLong(image);
 651         HDR.imagf=ReadBlobLSBLong(image);
 652         HDR.nameLen=ReadBlobLSBLong(image);
 653         endian=LSBEndian;
 654       }
 655     else
 656       {
 657         HDR.nRows=ReadBlobMSBLong(image);
 658         HDR.nCols=ReadBlobMSBLong(image);
 659         HDR.imagf=ReadBlobMSBLong(image);
 660         HDR.nameLen=ReadBlobMSBLong(image);
 661         endian=MSBEndian;
 662       }
 663     if ((HDR.imagf != 0) && (HDR.imagf != 1))
 664       break;
 665     if (HDR.nameLen > 0xFFFF)
 666       return((Image *) NULL);
 667     for (i=0; i < (ssize_t) HDR.nameLen; i++)
 668     {
 669       int
 670         byte;
 671
 672       /*
 673         Skip matrix name.
 674       */
 675       byte=ReadBlobByte(image);
 676       if (byte == EOF)
 677         {
 678           ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
 679             image->filename);
 680           break;
 681         }
 682     }
 683     image->columns=(size_t) HDR.nRows;
 684     image->rows=(size_t) HDR.nCols;
 685     SetImageColorspace(image,GRAYColorspace,exception);
 686     if (image_info->ping != MagickFalse)
 687       {
 688         Swap(image->columns,image->rows);
 689         return(image);
 690       }
 691     status=SetImageExtent(image,image->columns,image->rows,exception);
 692     if (status == MagickFalse)
 693       return((Image *) NULL);
 694     quantum_info=AcquireQuantumInfo(image_info,image);
 695     if (quantum_info == (QuantumInfo *) NULL)
 696       return((Image *) NULL);
 697     switch(HDR.Type[1])
 698     {
 699       case 0:
 700         format_type=FloatingPointQuantumFormat;
 701         depth=64;
 702         break;
 703       case 1:
 704         format_type=FloatingPointQuantumFormat;
 705         depth=32;
 706         break;
 707       case 2:
 708         format_type=UnsignedQuantumFormat;
 709         depth=16;
 710         break;
 711       case 3:
 712         format_type=SignedQuantumFormat;
 713         depth=16;
 714         break;
 715       case 4:
 716         format_type=UnsignedQuantumFormat;
 717         depth=8;
 718         break;
 719       default:
 720         format_type=UnsignedQuantumFormat;
 721         depth=8;
 722         break;
 723     }
 724     image->depth=depth;
 725     if (HDR.Type[0] != 0)
 726       SetQuantumEndian(image,quantum_info,MSBEndian);
 727     status=SetQuantumFormat(image,quantum_info,format_type);
 728     status=SetQuantumDepth(image,quantum_info,depth);
 729     status=SetQuantumEndian(image,quantum_info,endian);
 730     SetQuantumScale(quantum_info,1.0);
 731     pixels=(unsigned char *) GetQuantumPixels(quantum_info);
 732     for (y=0; y < (ssize_t) image->rows; y++)
 733     {
 734       int
 735         status;
 736
 737       register Quantum
 738         *magick_restrict q;
 739
 740       count=ReadBlob(image,depth/8*image->columns,(char *) pixels);
 741       if (count == -1)
 742         break;
 743       q=QueueAuthenticPixels(image,0,image->rows-y-1,image->columns,1,
 744         exception);
 745       if (q == (Quantum *) NULL)
 746         break;
 747       (void) ImportQuantumPixels(image,(CacheView *) NULL,quantum_info,
 748         GrayQuantum,pixels,exception);
 749       if ((HDR.Type[1] == 2) || (HDR.Type[1] == 3))
 750         FixSignedValues(image,q,(int) image->columns);
 751       if (SyncAuthenticPixels(image,exception) == MagickFalse)
 752         break;
 753       if (image->previous == (Image *) NULL)
 754         {
 755           status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
 756             image->rows);
 757           if (status == MagickFalse)
 758             break;
 759         }
 760     }
 761     if (HDR.imagf == 1)
 762       for (y=0; y < (ssize_t) image->rows; y++)
 763       {
 764         /*
 765           Read complex pixels.
 766         */
 767         count=ReadBlob(image,depth/8*image->columns,(char *) pixels);
 768         if (count == -1)
 769           break;
 770         if (HDR.Type[1] == 0)
 771           InsertComplexDoubleRow(image,(double *) pixels,y,0,0,exception);
 772         else
 773           InsertComplexFloatRow(image,(float *) pixels,y,0,0,exception);
 774       }
 775     quantum_info=DestroyQuantumInfo(quantum_info);
 776     rotate_image=RotateImage(image,90.0,exception);
 777     if (rotate_image != (Image *) NULL)
 778       {
 779         image=DestroyImage(image);
 780         image=rotate_image;
 781       }
 782     if (EOFBlob(image) != MagickFalse)
 783       {
 784         ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
 785           image->filename);
 786         break;
 787       }
 788     /*
 789       Proceed to next image.
 790     */
 791     if (image_info->number_scenes != 0)
 792       if (image->scene >= (image_info->scene+image_info->number_scenes-1))
 793         break;
 794     /*
 795       Allocate next image structure.
 796     */
 797     AcquireNextImage(image_info,image,exception);
 798     if (GetNextImageInList(image) == (Image *) NULL)
 799       {
 800         image=DestroyImageList(image);
 801         return((Image *) NULL);
 802       }
 803     image=SyncNextImageInList(image);
 804     status=SetImageProgress(image,LoadImagesTag,TellBlob(image),
 805       GetBlobSize(image));
 806     if (status == MagickFalse)
 807       break;
 808   }
 809   (void) CloseBlob(image);
 810   return(GetFirstImageInList(image));
 811 }
 812 \f
 813 /*
 814 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 815 %                                                                             %
 816 %                                                                             %
 817 %                                                                             %
 818 %   R e a d M A T L A B i m a g e                                             %
 819 %                                                                             %
 820 %                                                                             %
 821 %                                                                             %
 822 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 823 %
 824 %  ReadMATImage() reads an MAT X image file and returns it.  It
 825 %  allocates the memory necessary for the new Image structure and returns a
 826 %  pointer to the new image.
 827 %
 828 %  The format of the ReadMATImage method is:
 829 %
 830 %      Image *ReadMATImage(const ImageInfo *image_info,ExceptionInfo *exception)
 831 %
 832 %  A description of each parameter follows:
 833 %
 834 %    o image:  Method ReadMATImage returns a pointer to the image after
 835 %      reading. A null image is returned if there is a memory shortage or if
 836 %      the image cannot be read.
 837 %
 838 %    o image_info: Specifies a pointer to a ImageInfo structure.
 839 %
 840 %    o exception: return any errors or warnings in this structure.
 841 %
 842 */
 843 static Image *ReadMATImage(const ImageInfo *image_info,ExceptionInfo *exception)
 844 {
 845   Image *image, *image2=NULL,
 846    *rotated_image;
 847   register Quantum *q;
 848
 849   unsigned int status;
 850   MATHeader MATLAB_HDR;
 851   size_t size;
 852   size_t CellType;
 853   QuantumInfo *quantum_info;
 854   ImageInfo *clone_info;
 855   int i;
 856   ssize_t ldblk;
 857   unsigned char *BImgBuff = NULL;
 858   double MinVal, MaxVal;
 859   unsigned z, z2;
 860   unsigned Frames;
 861   int logging;
 862   int sample_size;
 863   MagickOffsetType filepos=0x80;
 864   BlobInfo *blob;
 865   size_t one;
 866
 867   unsigned int (*ReadBlobXXXLong)(Image *image);
 868   unsigned short (*ReadBlobXXXShort)(Image *image);
 869   void (*ReadBlobDoublesXXX)(Image * image, size_t len, double *data);
 870   void (*ReadBlobFloatsXXX)(Image * image, size_t len, float *data);
 871
 872
 873   assert(image_info != (const ImageInfo *) NULL);
 874   assert(image_info->signature == MagickCoreSignature);
 875   assert(exception != (ExceptionInfo *) NULL);
 876   assert(exception->signature == MagickCoreSignature);
 877   logging = LogMagickEvent(CoderEvent,GetMagickModule(),"enter");
 878
 879   /*
 880      Open image file.
 881    */
 882   image = AcquireImage(image_info,exception);
 883
 884   status = OpenBlob(image_info, image, ReadBinaryBlobMode, exception);
 885   if (status == MagickFalse)
 886     {
 887       image=DestroyImageList(image);
 888       return((Image *) NULL);
 889     }
 890   /*
 891      Read MATLAB image.
 892    */
 893   clone_info=CloneImageInfo(image_info);
 894   if (ReadBlob(image,124,(unsigned char *) &MATLAB_HDR.identific) != 124)
 895     ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 896   if (strncmp(MATLAB_HDR.identific,"MATLAB",6) != 0)
 897     {
 898       image2=ReadMATImageV4(image_info,image,exception);
 899       if (image2  == NULL)
 900         goto MATLAB_KO;
 901       image=image2;
 902       goto END_OF_READING;
 903     }
 904   MATLAB_HDR.Version = ReadBlobLSBShort(image);
 905   if(ReadBlob(image,2,(unsigned char *) &MATLAB_HDR.EndianIndicator) != 2)
 906     ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 907
 908   if (logging)
 909     (void) LogMagickEvent(CoderEvent,GetMagickModule(),"  Endian %c%c",
 910       MATLAB_HDR.EndianIndicator[0],MATLAB_HDR.EndianIndicator[1]);
 911   if (!strncmp(MATLAB_HDR.EndianIndicator, "IM", 2))
 912   {
 913     ReadBlobXXXLong = ReadBlobLSBLong;
 914     ReadBlobXXXShort = ReadBlobLSBShort;
 915     ReadBlobDoublesXXX = ReadBlobDoublesLSB;
 916     ReadBlobFloatsXXX = ReadBlobFloatsLSB;
 917     image->endian = LSBEndian;
 918   }
 919   else if (!strncmp(MATLAB_HDR.EndianIndicator, "MI", 2))
 920   {
 921     ReadBlobXXXLong = ReadBlobMSBLong;
 922     ReadBlobXXXShort = ReadBlobMSBShort;
 923     ReadBlobDoublesXXX = ReadBlobDoublesMSB;
 924     ReadBlobFloatsXXX = ReadBlobFloatsMSB;
 925     image->endian = MSBEndian;
 926   }
 927   else
 928     goto MATLAB_KO;    /* unsupported endian */
 929
 930   if (strncmp(MATLAB_HDR.identific, "MATLAB", 6))
 931 MATLAB_KO: ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 932
 933   filepos = TellBlob(image);
 934   while(!EOFBlob(image)) /* object parser loop */
 935   {
 936     Frames = 1;
 937     (void) SeekBlob(image,filepos,SEEK_SET);
 938     /* printf("pos=%X\n",TellBlob(image)); */
 939
 940     MATLAB_HDR.DataType = ReadBlobXXXLong(image);
 941     if(EOFBlob(image)) break;
 942     MATLAB_HDR.ObjectSize = ReadBlobXXXLong(image);
 943     if(EOFBlob(image)) break;
 944     filepos += MATLAB_HDR.ObjectSize + 4 + 4;
 945
 946     image2 = image;
 947 #if defined(MAGICKCORE_ZLIB_DELEGATE)
 948     if(MATLAB_HDR.DataType == miCOMPRESSED)
 949     {
 950       image2 = DecompressBlock(image,MATLAB_HDR.ObjectSize,clone_info,exception);
 951       if(image2==NULL) continue;
 952       MATLAB_HDR.DataType = ReadBlobXXXLong(image2); /* replace compressed object type. */
 953     }
 954 #endif
 955
 956     if(MATLAB_HDR.DataType!=miMATRIX) continue;  /* skip another objects. */
 957
 958     MATLAB_HDR.unknown1 = ReadBlobXXXLong(image2);
 959     MATLAB_HDR.unknown2 = ReadBlobXXXLong(image2);
 960
 961     MATLAB_HDR.unknown5 = ReadBlobXXXLong(image2);
 962     MATLAB_HDR.StructureClass = MATLAB_HDR.unknown5 & 0xFF;
 963     MATLAB_HDR.StructureFlag = (MATLAB_HDR.unknown5>>8) & 0xFF;
 964
 965     MATLAB_HDR.unknown3 = ReadBlobXXXLong(image2);
 966     if(image!=image2)
 967       MATLAB_HDR.unknown4 = ReadBlobXXXLong(image2);  /* ??? don't understand why ?? */
 968     MATLAB_HDR.unknown4 = ReadBlobXXXLong(image2);
 969     MATLAB_HDR.DimFlag = ReadBlobXXXLong(image2);
 970     MATLAB_HDR.SizeX = ReadBlobXXXLong(image2);
 971     MATLAB_HDR.SizeY = ReadBlobXXXLong(image2);
 972
 973
 974     switch(MATLAB_HDR.DimFlag)
 975     {
 976       case  8: z2=z=1; break;      /* 2D matrix*/
 977       case 12: z2=z = ReadBlobXXXLong(image2);  /* 3D matrix RGB*/
 978            (void) ReadBlobXXXLong(image2);
 979          if(z!=3) ThrowReaderException(CoderError, "MultidimensionalMatricesAreNotSupported");
 980          break;
 981       case 16: z2=z = ReadBlobXXXLong(image2);  /* 4D matrix animation */
 982          if(z!=3 && z!=1)
 983             ThrowReaderException(CoderError, "MultidimensionalMatricesAreNotSupported");
 984          Frames = ReadBlobXXXLong(image2);
 985          if (Frames == 0)
 986            ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 987          break;
 988       default: ThrowReaderException(CoderError, "MultidimensionalMatricesAreNotSupported");
 989     }
 990
 991     MATLAB_HDR.Flag1 = ReadBlobXXXShort(image2);
 992     MATLAB_HDR.NameFlag = ReadBlobXXXShort(image2);
 993
 994     if (logging) (void)LogMagickEvent(CoderEvent,GetMagickModule(),
 995           "MATLAB_HDR.StructureClass %d",MATLAB_HDR.StructureClass);
 996     if (MATLAB_HDR.StructureClass != mxCHAR_CLASS &&
 997         MATLAB_HDR.StructureClass != mxSINGLE_CLASS &&    /* float + complex float */
 998         MATLAB_HDR.StructureClass != mxDOUBLE_CLASS &&    /* double + complex double */
 999         MATLAB_HDR.StructureClass != mxINT8_CLASS &&
1000         MATLAB_HDR.StructureClass != mxUINT8_CLASS &&    /* uint8 + uint8 3D */
1001         MATLAB_HDR.StructureClass != mxINT16_CLASS &&
1002         MATLAB_HDR.StructureClass != mxUINT16_CLASS &&    /* uint16 + uint16 3D */
1003         MATLAB_HDR.StructureClass != mxINT32_CLASS &&
1004         MATLAB_HDR.StructureClass != mxUINT32_CLASS &&    /* uint32 + uint32 3D */
1005         MATLAB_HDR.StructureClass != mxINT64_CLASS &&
1006         MATLAB_HDR.StructureClass != mxUINT64_CLASS)    /* uint64 + uint64 3D */
1007       ThrowReaderException(CoderError,"UnsupportedCellTypeInTheMatrix");
1008
1009     switch (MATLAB_HDR.NameFlag)
1010     {
1011       case 0:
1012         size = ReadBlobXXXLong(image2);  /* Object name string size */
1013         size = 4 * (ssize_t) ((size + 3 + 1) / 4);
1014         (void) SeekBlob(image2, size, SEEK_CUR);
1015         break;
1016       case 1:
1017       case 2:
1018       case 3:
1019       case 4:
1020         (void) ReadBlob(image2, 4, (unsigned char *) &size); /* Object name string */
1021         break;
1022       default:
1023         goto MATLAB_KO;
1024     }
1025
1026     CellType = ReadBlobXXXLong(image2);    /* Additional object type */
1027     if (logging)
1028       (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1029         "MATLAB_HDR.CellType: %.20g",(double) CellType);
1030
1031     (void) ReadBlob(image2, 4, (unsigned char *) &size);     /* data size */
1032
1033     NEXT_FRAME:
1034     switch (CellType)
1035     {
1036       case miINT8:
1037       case miUINT8:
1038         sample_size = 8;
1039         if(MATLAB_HDR.StructureFlag & FLAG_LOGICAL)
1040           image->depth = 1;
1041         else
1042           image->depth = 8;         /* Byte type cell */
1043         ldblk = (ssize_t) MATLAB_HDR.SizeX;
1044         break;
1045       case miINT16:
1046       case miUINT16:
1047         sample_size = 16;
1048         image->depth = 16;        /* Word type cell */
1049         ldblk = (ssize_t) (2 * MATLAB_HDR.SizeX);
1050         break;
1051       case miINT32:
1052       case miUINT32:
1053         sample_size = 32;
1054         image->depth = 32;        /* Dword type cell */
1055         ldblk = (ssize_t) (4 * MATLAB_HDR.SizeX);
1056         break;
1057       case miINT64:
1058       case miUINT64:
1059         sample_size = 64;
1060         image->depth = 64;        /* Qword type cell */
1061         ldblk = (ssize_t) (8 * MATLAB_HDR.SizeX);
1062         break;
1063       case miSINGLE:
1064         sample_size = 32;
1065         image->depth = 32;        /* double type cell */
1066         (void) SetImageOption(clone_info,"quantum:format","floating-point");
1067         if (MATLAB_HDR.StructureFlag & FLAG_COMPLEX)
1068   {              /* complex float type cell */
1069   }
1070         ldblk = (ssize_t) (4 * MATLAB_HDR.SizeX);
1071         break;
1072       case miDOUBLE:
1073         sample_size = 64;
1074         image->depth = 64;        /* double type cell */
1075         (void) SetImageOption(clone_info,"quantum:format","floating-point");
1076 DisableMSCWarning(4127)
1077         if (sizeof(double) != 8)
1078 RestoreMSCWarning
1079           ThrowReaderException(CoderError, "IncompatibleSizeOfDouble");
1080         if (MATLAB_HDR.StructureFlag & FLAG_COMPLEX)
1081   {                         /* complex double type cell */
1082   }
1083         ldblk = (ssize_t) (8 * MATLAB_HDR.SizeX);
1084         break;
1085       default:
1086         ThrowReaderException(CoderError, "UnsupportedCellTypeInTheMatrix");
1087     }
1088     (void) sample_size;
1089     image->columns = MATLAB_HDR.SizeX;
1090     image->rows = MATLAB_HDR.SizeY;
1091     quantum_info=AcquireQuantumInfo(clone_info,image);
1092     if (quantum_info == (QuantumInfo *) NULL)
1093       ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
1094     one=1;
1095     image->colors = one << image->depth;
1096     if (image->columns == 0 || image->rows == 0)
1097       goto MATLAB_KO;
1098     /* Image is gray when no complex flag is set and 2D Matrix */
1099     if ((MATLAB_HDR.DimFlag == 8) &&
1100         ((MATLAB_HDR.StructureFlag & FLAG_COMPLEX) == 0))
1101       {
1102         image->type=GrayscaleType;
1103         SetImageColorspace(image,GRAYColorspace,exception);
1104       }
1105
1106
1107     /*
1108       If ping is true, then only set image size and colors without
1109       reading any image data.
1110     */
1111     if (image_info->ping)
1112     {
1113       size_t temp = image->columns;
1114       image->columns = image->rows;
1115       image->rows = temp;
1116       goto done_reading; /* !!!!!! BAD  !!!! */
1117     }
1118     status=SetImageExtent(image,image->columns,image->rows,exception);
1119     if (status == MagickFalse)
1120       return(DestroyImageList(image));
1121
1122   /* ----- Load raster data ----- */
1123     BImgBuff = (unsigned char *) AcquireQuantumMemory((size_t) (ldblk),sizeof(double));    /* Ldblk was set in the check phase */
1124     if (BImgBuff == NULL)
1125       ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
1126
1127     MinVal = 0;
1128     MaxVal = 0;
1129     if (CellType==miDOUBLE || CellType==miSINGLE)        /* Find Min and Max Values for floats */
1130     {
1131       CalcMinMax(image2, image_info->endian,  MATLAB_HDR.SizeX, MATLAB_HDR.SizeY, CellType, ldblk, BImgBuff, &quantum_info->minimum, &quantum_info->maximum);
1132     }
1133
1134     /* Main loop for reading all scanlines */
1135     if(z==1) z=0; /* read grey scanlines */
1136     /* else read color scanlines */
1137     do
1138     {
1139       for (i = 0; i < (ssize_t) MATLAB_HDR.SizeY; i++)
1140       {
1141         q=GetAuthenticPixels(image,0,MATLAB_HDR.SizeY-i-1,image->columns,1,exception);
1142         if (q == (Quantum *) NULL)
1143   {
1144     if (logging) (void)LogMagickEvent(CoderEvent,GetMagickModule(),
1145               "  MAT set image pixels returns unexpected NULL on a row %u.", (unsigned)(MATLAB_HDR.SizeY-i-1));
1146     goto done_reading;    /* Skip image rotation, when cannot set image pixels    */
1147   }
1148         if(ReadBlob(image2,ldblk,(unsigned char *)BImgBuff) != (ssize_t) ldblk)
1149   {
1150     if (logging) (void)LogMagickEvent(CoderEvent,GetMagickModule(),
1151              "  MAT cannot read scanrow %u from a file.", (unsigned)(MATLAB_HDR.SizeY-i-1));
1152     goto ExitLoop;
1153   }
1154         if((CellType==miINT8 || CellType==miUINT8) && (MATLAB_HDR.StructureFlag & FLAG_LOGICAL))
1155         {
1156           FixLogical((unsigned char *)BImgBuff,ldblk);
1157           if(ImportQuantumPixels(image,(CacheView *) NULL,quantum_info,z2qtype[z],BImgBuff,exception) <= 0)
1158     {
1159 ImportQuantumPixelsFailed:
1160       if (logging) (void)LogMagickEvent(CoderEvent,GetMagickModule(),
1161               "  MAT failed to ImportQuantumPixels for a row %u", (unsigned)(MATLAB_HDR.SizeY-i-1));
1162       break;
1163     }
1164         }
1165         else
1166         {
1167           if(ImportQuantumPixels(image,(CacheView *) NULL,quantum_info,z2qtype[z],BImgBuff,exception) <= 0)
1168       goto ImportQuantumPixelsFailed;
1169
1170
1171           if (z<=1 &&       /* fix only during a last pass z==0 || z==1 */
1172           (CellType==miINT8 || CellType==miINT16 || CellType==miINT32 || CellType==miINT64))
1173       FixSignedValues(image,q,MATLAB_HDR.SizeX);
1174         }
1175
1176         if (!SyncAuthenticPixels(image,exception))
1177   {
1178     if (logging) (void)LogMagickEvent(CoderEvent,GetMagickModule(),
1179             "  MAT failed to sync image pixels for a row %u", (unsigned)(MATLAB_HDR.SizeY-i-1));
1180     goto ExitLoop;
1181   }
1182       }
1183     } while(z-- >= 2);
1184     quantum_info=DestroyQuantumInfo(quantum_info);
1185 ExitLoop:
1186
1187
1188     /* Read complex part of numbers here */
1189     if (MATLAB_HDR.StructureFlag & FLAG_COMPLEX)
1190     {        /* Find Min and Max Values for complex parts of floats */
1191       CellType = ReadBlobXXXLong(image2);    /* Additional object type */
1192       i = ReadBlobXXXLong(image2);           /* size of a complex part - toss away*/
1193
1194       if (CellType==miDOUBLE || CellType==miSINGLE)
1195       {
1196         CalcMinMax(image2,  image_info->endian, MATLAB_HDR.SizeX, MATLAB_HDR.SizeY, CellType, ldblk, BImgBuff, &MinVal, &MaxVal);
1197       }
1198
1199       if (CellType==miDOUBLE)
1200         for (i = 0; i < (ssize_t) MATLAB_HDR.SizeY; i++)
1201   {
1202           ReadBlobDoublesXXX(image2, ldblk, (double *)BImgBuff);
1203           InsertComplexDoubleRow(image, (double *)BImgBuff, i, MinVal, MaxVal,
1204             exception);
1205   }
1206
1207       if (CellType==miSINGLE)
1208         for (i = 0; i < (ssize_t) MATLAB_HDR.SizeY; i++)
1209   {
1210           ReadBlobFloatsXXX(image2, ldblk, (float *)BImgBuff);
1211           InsertComplexFloatRow(image,(float *)BImgBuff,i,MinVal,MaxVal,
1212             exception);
1213   }
1214     }
1215
1216       /* Image is gray when no complex flag is set and 2D Matrix AGAIN!!! */
1217     if ((MATLAB_HDR.DimFlag == 8) &&
1218         ((MATLAB_HDR.StructureFlag & FLAG_COMPLEX) == 0))
1219       image->type=GrayscaleType;
1220     if (image->depth == 1)
1221       image->type=BilevelType;
1222
1223     if(image2==image)
1224         image2 = NULL;    /* Remove shadow copy to an image before rotation. */
1225
1226       /*  Rotate image. */
1227     rotated_image = RotateImage(image, 90.0, exception);
1228     if (rotated_image != (Image *) NULL)
1229     {
1230         /* Remove page offsets added by RotateImage */
1231       rotated_image->page.x=0;
1232       rotated_image->page.y=0;
1233
1234       blob = rotated_image->blob;
1235       rotated_image->blob = image->blob;
1236       rotated_image->colors = image->colors;
1237       image->blob = blob;
1238       AppendImageToList(&image,rotated_image);
1239       DeleteImageFromList(&image);
1240     }
1241
1242 done_reading:
1243
1244     if(image2!=NULL)
1245       if(image2!=image)
1246       {
1247         DeleteImageFromList(&image2);
1248   if(clone_info)
1249   {
1250           if(clone_info->file)
1251     {
1252             fclose(clone_info->file);
1253             clone_info->file = NULL;
1254             (void) remove_utf8(clone_info->filename);
1255     }
1256         }
1257       }
1258
1259       /* Allocate next image structure. */
1260     AcquireNextImage(image_info,image,exception);
1261     if (image->next == (Image *) NULL) break;
1262     image=SyncNextImageInList(image);
1263     image->columns=image->rows=0;
1264     image->colors=0;
1265
1266       /* row scan buffer is no longer needed */
1267     RelinquishMagickMemory(BImgBuff);
1268     BImgBuff = NULL;
1269
1270     if(--Frames>0)
1271     {
1272       z = z2;
1273       if(image2==NULL) image2 = image;
1274       goto NEXT_FRAME;
1275     }
1276     if ((image2!=NULL) && (image2!=image))   /* Does shadow temporary decompressed image exist? */
1277       {
1278 /*  CloseBlob(image2); */
1279         DeleteImageFromList(&image2);
1280         if(clone_info)
1281         {
1282           if(clone_info->file)
1283           {
1284             fclose(clone_info->file);
1285             clone_info->file = NULL;
1286             (void) remove_utf8(clone_info->filename);
1287           }
1288         }
1289         }
1290   }
1291
1292   RelinquishMagickMemory(BImgBuff);
1293 END_OF_READING:
1294   clone_info=DestroyImageInfo(clone_info);
1295   CloseBlob(image);
1296
1297
1298   {
1299     Image *p;
1300     ssize_t scene=0;
1301
1302     /*
1303       Rewind list, removing any empty images while rewinding.
1304     */
1305     p=image;
1306     image=NULL;
1307     while (p != (Image *) NULL)
1308       {
1309         Image *tmp=p;
1310         if ((p->rows == 0) || (p->columns == 0)) {
1311           p=p->previous;
1312           DeleteImageFromList(&tmp);
1313         } else {
1314           image=p;
1315           p=p->previous;
1316         }
1317       }
1318
1319     /*
1320       Fix scene numbers
1321     */
1322     for (p=image; p != (Image *) NULL; p=p->next)
1323       p->scene=scene++;
1324   }
1325
1326   if(clone_info != NULL)  /* cleanup garbage file from compression */
1327   {
1328     if(clone_info->file)
1329     {
1330       fclose(clone_info->file);
1331       clone_info->file = NULL;
1332       (void) remove_utf8(clone_info->filename);
1333     }
1334     DestroyImageInfo(clone_info);
1335     clone_info = NULL;
1336   }
1337   if (logging) (void)LogMagickEvent(CoderEvent,GetMagickModule(),"return");
1338   if(image==NULL)
1339     ThrowReaderException(CorruptImageError,"ImproperImageHeader");
1340   return (image);
1341 }
1342 \f
1343 /*
1344 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1345 %                                                                             %
1346 %                                                                             %
1347 %                                                                             %
1348 %   R e g i s t e r M A T I m a g e                                           %
1349 %                                                                             %
1350 %                                                                             %
1351 %                                                                             %
1352 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1353 %
1354 %  Method RegisterMATImage adds attributes for the MAT image format to
1355 %  the list of supported formats.  The attributes include the image format
1356 %  tag, a method to read and/or write the format, whether the format
1357 %  supports the saving of more than one frame to the same file or blob,
1358 %  whether the format supports native in-memory I/O, and a brief
1359 %  description of the format.
1360 %
1361 %  The format of the RegisterMATImage method is:
1362 %
1363 %      size_t RegisterMATImage(void)
1364 %
1365 */
1366 ModuleExport size_t RegisterMATImage(void)
1367 {
1368   MagickInfo
1369     *entry;
1370
1371   entry=AcquireMagickInfo("MAT","MAT","MATLAB level 5 image format");
1372   entry->decoder=(DecodeImageHandler *) ReadMATImage;
1373   entry->encoder=(EncodeImageHandler *) WriteMATImage;
1374   entry->flags^=CoderBlobSupportFlag;
1375   entry->flags|=CoderDecoderSeekableStreamFlag;
1376   (void) RegisterMagickInfo(entry);
1377   return(MagickImageCoderSignature);
1378 }
1379 \f
1380 /*
1381 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1382 %                                                                             %
1383 %                                                                             %
1384 %                                                                             %
1385 %   U n r e g i s t e r M A T I m a g e                                       %
1386 %                                                                             %
1387 %                                                                             %
1388 %                                                                             %
1389 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1390 %
1391 %  Method UnregisterMATImage removes format registrations made by the
1392 %  MAT module from the list of supported formats.
1393 %
1394 %  The format of the UnregisterMATImage method is:
1395 %
1396 %      UnregisterMATImage(void)
1397 %
1398 */
1399 ModuleExport void UnregisterMATImage(void)
1400 {
1401   (void) UnregisterMagickInfo("MAT");
1402 }
1403 \f
1404 /*
1405 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1406 %                                                                             %
1407 %                                                                             %
1408 %                                                                             %
1409 %   W r i t e M A T L A B I m a g e                                           %
1410 %                                                                             %
1411 %                                                                             %
1412 %                                                                             %
1413 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1414 %
1415 %  Function WriteMATImage writes an Matlab matrix to a file.
1416 %
1417 %  The format of the WriteMATImage method is:
1418 %
1419 %      MagickBooleanType WriteMATImage(const ImageInfo *image_info,
1420 %        Image *image,ExceptionInfo *exception)
1421 %
1422 %  A description of each parameter follows.
1423 %
1424 %    o image_info: Specifies a pointer to a ImageInfo structure.
1425 %
1426 %    o image:  A pointer to an Image structure.
1427 %
1428 %    o exception: return any errors or warnings in this structure.
1429 %
1430 */
1431 static MagickBooleanType WriteMATImage(const ImageInfo *image_info,Image *image,
1432   ExceptionInfo *exception)
1433 {
1434   ssize_t y;
1435   unsigned z;
1436   register const Quantum *p;
1437
1438   unsigned int status;
1439   int logging;
1440   size_t DataSize;
1441   char padding;
1442   char MATLAB_HDR[0x80];
1443   time_t current_time;
1444   struct tm local_time;
1445   unsigned char *pixels;
1446   int is_gray;
1447
1448   MagickOffsetType
1449     scene;
1450
1451   QuantumInfo
1452     *quantum_info;
1453
1454   /*
1455     Open output image file.
1456   */
1457   assert(image_info != (const ImageInfo *) NULL);
1458   assert(image_info->signature == MagickCoreSignature);
1459   assert(image != (Image *) NULL);
1460   assert(image->signature == MagickCoreSignature);
1461   logging=LogMagickEvent(CoderEvent,GetMagickModule(),"enter MAT");
1462   (void) logging;
1463   assert(exception != (ExceptionInfo *) NULL);
1464   assert(exception->signature == MagickCoreSignature);
1465   status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
1466   if (status == MagickFalse)
1467     return(MagickFalse);
1468   image->depth=8;
1469
1470   current_time=time((time_t *) NULL);
1471 #if defined(MAGICKCORE_HAVE_LOCALTIME_R)
1472   (void) localtime_r(&current_time,&local_time);
1473 #else
1474   (void) memcpy(&local_time,localtime(&current_time),sizeof(local_time));
1475 #endif
1476   (void) memset(MATLAB_HDR,' ',MagickMin(sizeof(MATLAB_HDR),124));
1477   FormatLocaleString(MATLAB_HDR,sizeof(MATLAB_HDR),
1478     "MATLAB 5.0 MAT-file, Platform: %s, Created on: %s %s %2d %2d:%2d:%2d %d",
1479     OsDesc,DayOfWTab[local_time.tm_wday],MonthsTab[local_time.tm_mon],
1480     local_time.tm_mday,local_time.tm_hour,local_time.tm_min,
1481     local_time.tm_sec,local_time.tm_year+1900);
1482   MATLAB_HDR[0x7C]=0;
1483   MATLAB_HDR[0x7D]=1;
1484   MATLAB_HDR[0x7E]='I';
1485   MATLAB_HDR[0x7F]='M';
1486   (void) WriteBlob(image,sizeof(MATLAB_HDR),(unsigned char *) MATLAB_HDR);
1487   scene=0;
1488   do
1489   {
1490     (void) TransformImageColorspace(image,sRGBColorspace,exception);
1491     is_gray = SetImageGray(image,exception);
1492     z = is_gray ? 0 : 3;
1493
1494     /*
1495       Store MAT header.
1496     */
1497     DataSize = image->rows /*Y*/ * image->columns /*X*/;
1498     if(!is_gray) DataSize *= 3 /*Z*/;
1499     padding=((unsigned char)(DataSize-1) & 0x7) ^ 0x7;
1500
1501     (void) WriteBlobLSBLong(image, miMATRIX);
1502     (void) WriteBlobLSBLong(image, (unsigned int) DataSize+padding+(is_gray ? 48 : 56));
1503     (void) WriteBlobLSBLong(image, 0x6); /* 0x88 */
1504     (void) WriteBlobLSBLong(image, 0x8); /* 0x8C */
1505     (void) WriteBlobLSBLong(image, 0x6); /* 0x90 */
1506     (void) WriteBlobLSBLong(image, 0);
1507     (void) WriteBlobLSBLong(image, 0x5); /* 0x98 */
1508     (void) WriteBlobLSBLong(image, is_gray ? 0x8 : 0xC); /* 0x9C - DimFlag */
1509     (void) WriteBlobLSBLong(image, (unsigned int) image->rows);    /* x: 0xA0 */
1510     (void) WriteBlobLSBLong(image, (unsigned int) image->columns); /* y: 0xA4 */
1511     if(!is_gray)
1512     {
1513       (void) WriteBlobLSBLong(image, 3); /* z: 0xA8 */
1514       (void) WriteBlobLSBLong(image, 0);
1515     }
1516     (void) WriteBlobLSBShort(image, 1);  /* 0xB0 */
1517     (void) WriteBlobLSBShort(image, 1);  /* 0xB2 */
1518     (void) WriteBlobLSBLong(image, 'M'); /* 0xB4 */
1519     (void) WriteBlobLSBLong(image, 0x2); /* 0xB8 */
1520     (void) WriteBlobLSBLong(image, (unsigned int) DataSize); /* 0xBC */
1521
1522     /*
1523       Store image data.
1524     */
1525     quantum_info=AcquireQuantumInfo(image_info,image);
1526     if (quantum_info == (QuantumInfo *) NULL)
1527       ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
1528     pixels=(unsigned char *) GetQuantumPixels(quantum_info);
1529     do
1530     {
1531       for (y=0; y < (ssize_t)image->columns; y++)
1532       {
1533         p=GetVirtualPixels(image,y,0,1,image->rows,exception);
1534         if (p == (const Quantum *) NULL)
1535           break;
1536         (void) ExportQuantumPixels(image,(CacheView *) NULL,quantum_info,
1537           z2qtype[z],pixels,exception);
1538         (void) WriteBlob(image,image->rows,pixels);
1539       }
1540       if (SyncAuthenticPixels(image,exception) == MagickFalse)
1541         break;
1542     } while(z-- >= 2);
1543     while(padding-->0) (void) WriteBlobByte(image,0);
1544     quantum_info=DestroyQuantumInfo(quantum_info);
1545     if (GetNextImageInList(image) == (Image *) NULL)
1546       break;
1547     image=SyncNextImageInList(image);
1548     status=SetImageProgress(image,SaveImagesTag,scene++,
1549       GetImageListLength(image));
1550     if (status == MagickFalse)
1551       break;
1552   } while (image_info->adjoin != MagickFalse);
1553   (void) CloseBlob(image);
1554   return(MagickTrue);
1555 }