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

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