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

   1 /*
   2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   3 %                                                                             %
   4 %                                                                             %
   5 %                                                                             %
   6 %                            BBBB   M   M  PPPP                               %
   7 %                            B   B  MM MM  P   P                              %
   8 %                            BBBB   M M M  PPPP                               %
   9 %                            B   B  M   M  P                                  %
  10 %                            BBBB   M   M  P                                  %
  11 %                                                                             %
  12 %                                                                             %
  13 %             Read/Write Microsoft Windows Bitmap Image Format                %
  14 %                                                                             %
  15 %                              Software Design                                %
  16 %                                John Cristy                                  %
  17 %                            Glenn Randers-Pehrson                            %
  18 %                               December 2001                                 %
  19 %                                                                             %
  20 %                                                                             %
  21 %  Copyright 1999-2012 ImageMagick Studio LLC, a non-profit organization      %
  22 %  dedicated to making software imaging solutions freely available.           %
  23 %                                                                             %
  24 %  You may not use this file except in compliance with the License.  You may  %
  25 %  obtain a copy of the License at                                            %
  26 %                                                                             %
  27 %    http://www.imagemagick.org/script/license.php                            %
  28 %                                                                             %
  29 %  Unless required by applicable law or agreed to in writing, software        %
  30 %  distributed under the License is distributed on an "AS IS" BASIS,          %
  31 %  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.   %
  32 %  See the License for the specific language governing permissions and        %
  33 %  limitations under the License.                                             %
  34 %                                                                             %
  35 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  36 %
  37 %
  38 */
  39 \f
  40 /*
  41   Include declarations.
  42 */
  43 #include "MagickCore/studio.h"
  44 #include "MagickCore/blob.h"
  45 #include "MagickCore/blob-private.h"
  46 #include "MagickCore/cache.h"
  47 #include "MagickCore/colormap-private.h"
  48 #include "MagickCore/color-private.h"
  49 #include "MagickCore/colormap.h"
  50 #include "MagickCore/colorspace.h"
  51 #include "MagickCore/colorspace-private.h"
  52 #include "MagickCore/exception.h"
  53 #include "MagickCore/exception-private.h"
  54 #include "MagickCore/image.h"
  55 #include "MagickCore/image-private.h"
  56 #include "MagickCore/list.h"
  57 #include "MagickCore/log.h"
  58 #include "MagickCore/magick.h"
  59 #include "MagickCore/memory_.h"
  60 #include "MagickCore/monitor.h"
  61 #include "MagickCore/monitor-private.h"
  62 #include "MagickCore/pixel-accessor.h"
  63 #include "MagickCore/profile.h"
  64 #include "MagickCore/quantum-private.h"
  65 #include "MagickCore/static.h"
  66 #include "MagickCore/string_.h"
  67 #include "MagickCore/module.h"
  68 #include "MagickCore/transform.h"
  69 \f
  70 /*
  71   Macro definitions (from Windows wingdi.h).
  72 */
  73 #undef BI_JPEG
  74 #define BI_JPEG  4
  75 #undef BI_PNG
  76 #define BI_PNG  5
  77 #if !defined(MAGICKCORE_WINDOWS_SUPPORT) || defined(__MINGW32__)
  78 #undef BI_RGB
  79 #define BI_RGB  0
  80 #undef BI_RLE8
  81 #define BI_RLE8  1
  82 #undef BI_RLE4
  83 #define BI_RLE4  2
  84 #undef BI_BITFIELDS
  85 #define BI_BITFIELDS  3
  86
  87 #undef LCS_CALIBRATED_RBG
  88 #define LCS_CALIBRATED_RBG  0
  89 #undef LCS_sRGB
  90 #define LCS_sRGB  1
  91 #undef LCS_WINDOWS_COLOR_SPACE
  92 #define LCS_WINDOWS_COLOR_SPACE  2
  93 #undef PROFILE_LINKED
  94 #define PROFILE_LINKED  3
  95 #undef PROFILE_EMBEDDED
  96 #define PROFILE_EMBEDDED  4
  97
  98 #undef LCS_GM_BUSINESS
  99 #define LCS_GM_BUSINESS  1  /* Saturation */
 100 #undef LCS_GM_GRAPHICS
 101 #define LCS_GM_GRAPHICS  2  /* Relative */
 102 #undef LCS_GM_IMAGES
 103 #define LCS_GM_IMAGES  4  /* Perceptual */
 104 #undef LCS_GM_ABS_COLORIMETRIC
 105 #define LCS_GM_ABS_COLORIMETRIC  8  /* Absolute */
 106 #endif
 107 \f
 108 /*
 109   Typedef declarations.
 110 */
 111 typedef struct _BMPInfo
 112 {
 113   unsigned int
 114     file_size,
 115     ba_offset,
 116     offset_bits,
 117     size;
 118
 119   ssize_t
 120     width,
 121     height;
 122
 123   unsigned short
 124     planes,
 125     bits_per_pixel;
 126
 127   unsigned int
 128     compression,
 129     image_size,
 130     x_pixels,
 131     y_pixels,
 132     number_colors,
 133     red_mask,
 134     green_mask,
 135     blue_mask,
 136     alpha_mask,
 137     colors_important;
 138
 139   int
 140     colorspace;
 141
 142   PrimaryInfo
 143     red_primary,
 144     green_primary,
 145     blue_primary,
 146     gamma_scale;
 147 } BMPInfo;
 148 \f
 149 /*
 150   Forward declarations.
 151 */
 152 static MagickBooleanType
 153   WriteBMPImage(const ImageInfo *,Image *,ExceptionInfo *);
 154 \f
 155 /*
 156 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 157 %                                                                             %
 158 %                                                                             %
 159 %                                                                             %
 160 %   D e c o d e I m a g e                                                     %
 161 %                                                                             %
 162 %                                                                             %
 163 %                                                                             %
 164 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 165 %
 166 %  DecodeImage unpacks the packed image pixels into runlength-encoded
 167 %  pixel packets.
 168 %
 169 %  The format of the DecodeImage method is:
 170 %
 171 %      MagickBooleanType DecodeImage(Image *image,
 172 %        const size_t compression,unsigned char *pixels)
 173 %
 174 %  A description of each parameter follows:
 175 %
 176 %    o image: the address of a structure of type Image.
 177 %
 178 %    o compression:  Zero means uncompressed.  A value of 1 means the
 179 %      compressed pixels are runlength encoded for a 256-color bitmap.
 180 %      A value of 2 means a 16-color bitmap.  A value of 3 means bitfields
 181 %      encoding.
 182 %
 183 %    o pixels:  The address of a byte (8 bits) array of pixel data created by
 184 %      the decoding process.
 185 %
 186 */
 187
 188 static inline ssize_t MagickAbsoluteValue(const ssize_t x)
 189 {
 190   if (x < 0)
 191     return(-x);
 192   return(x);
 193 }
 194
 195 static inline size_t MagickMax(const size_t x,const size_t y)
 196 {
 197   if (x > y)
 198     return(x);
 199   return(y);
 200 }
 201
 202 static inline ssize_t MagickMin(const ssize_t x,const ssize_t y)
 203 {
 204   if (x < y)
 205     return(x);
 206   return(y);
 207 }
 208
 209 static MagickBooleanType DecodeImage(Image *image,const size_t compression,
 210   unsigned char *pixels)
 211 {
 212   int
 213     count;
 214
 215   register ssize_t
 216     i,
 217     x;
 218
 219   register unsigned char
 220     *p,
 221     *q;
 222
 223   ssize_t
 224     y;
 225
 226   unsigned char
 227     byte;
 228
 229   assert(image != (Image *) NULL);
 230   assert(image->signature == MagickSignature);
 231   if (image->debug != MagickFalse)
 232     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
 233   assert(pixels != (unsigned char *) NULL);
 234   (void) ResetMagickMemory(pixels,0,(size_t) image->columns*image->rows*
 235     sizeof(*pixels));
 236   byte=0;
 237   x=0;
 238   p=pixels;
 239   q=pixels+(size_t) image->columns*image->rows;
 240   for (y=0; y < (ssize_t) image->rows; )
 241   {
 242     if ((p < pixels) || (p >= q))
 243       break;
 244     count=ReadBlobByte(image);
 245     if (count == EOF)
 246       break;
 247     if (count != 0)
 248       {
 249         /*
 250           Encoded mode.
 251         */
 252         count=MagickMin(count,(int) (q-p));
 253         byte=(unsigned char) ReadBlobByte(image);
 254         if (compression == BI_RLE8)
 255           {
 256             for (i=0; i < count; i++)
 257               *p++=(unsigned char) byte;
 258           }
 259         else
 260           {
 261             for (i=0; i < count; i++)
 262               *p++=(unsigned char)
 263                 ((i & 0x01) != 0 ? (byte & 0x0f) : ((byte >> 4) & 0x0f));
 264           }
 265         x+=count;
 266       }
 267     else
 268       {
 269         /*
 270           Escape mode.
 271         */
 272         count=ReadBlobByte(image);
 273         if (count == 0x01)
 274           return(MagickTrue);
 275         switch (count)
 276         {
 277           case 0x00:
 278           {
 279             /*
 280               End of line.
 281             */
 282             x=0;
 283             y++;
 284             p=pixels+y*image->columns;
 285             break;
 286           }
 287           case 0x02:
 288           {
 289             /*
 290               Delta mode.
 291             */
 292             x+=ReadBlobByte(image);
 293             y+=ReadBlobByte(image);
 294             p=pixels+y*image->columns+x;
 295             break;
 296           }
 297           default:
 298           {
 299             /*
 300               Absolute mode.
 301             */
 302             count=MagickMin(count,(int) (q-p));
 303             if (compression == BI_RLE8)
 304               for (i=0; i < count; i++)
 305                 *p++=(unsigned char) ReadBlobByte(image);
 306             else
 307               for (i=0; i < count; i++)
 308               {
 309                 if ((i & 0x01) == 0)
 310                   byte=(unsigned char) ReadBlobByte(image);
 311                 *p++=(unsigned char)
 312                   ((i & 0x01) != 0 ? (byte & 0x0f) : ((byte >> 4) & 0x0f));
 313               }
 314             x+=count;
 315             /*
 316               Read pad byte.
 317             */
 318             if (compression == BI_RLE8)
 319               {
 320                 if ((count & 0x01) != 0)
 321                   (void) ReadBlobByte(image);
 322               }
 323             else
 324               if (((count & 0x03) == 1) || ((count & 0x03) == 2))
 325                 (void) ReadBlobByte(image);
 326             break;
 327           }
 328         }
 329       }
 330     if (SetImageProgress(image,LoadImageTag,y,image->rows) == MagickFalse)
 331       break;
 332   }
 333   (void) ReadBlobByte(image);  /* end of line */
 334   (void) ReadBlobByte(image);
 335   return(MagickTrue);
 336 }
 337 \f
 338 /*
 339 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 340 %                                                                             %
 341 %                                                                             %
 342 %                                                                             %
 343 %   E n c o d e I m a g e                                                     %
 344 %                                                                             %
 345 %                                                                             %
 346 %                                                                             %
 347 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 348 %
 349 %  EncodeImage compresses pixels using a runlength encoded format.
 350 %
 351 %  The format of the EncodeImage method is:
 352 %
 353 %    static MagickBooleanType EncodeImage(Image *image,
 354 %      const size_t bytes_per_line,const unsigned char *pixels,
 355 %      unsigned char *compressed_pixels)
 356 %
 357 %  A description of each parameter follows:
 358 %
 359 %    o image:  The image.
 360 %
 361 %    o bytes_per_line: the number of bytes in a scanline of compressed pixels
 362 %
 363 %    o pixels:  The address of a byte (8 bits) array of pixel data created by
 364 %      the compression process.
 365 %
 366 %    o compressed_pixels:  The address of a byte (8 bits) array of compressed
 367 %      pixel data.
 368 %
 369 */
 370 static size_t EncodeImage(Image *image,const size_t bytes_per_line,
 371   const unsigned char *pixels,unsigned char *compressed_pixels)
 372 {
 373   MagickBooleanType
 374     status;
 375
 376   register const unsigned char
 377     *p;
 378
 379   register ssize_t
 380     i,
 381     x;
 382
 383   register unsigned char
 384     *q;
 385
 386   ssize_t
 387     y;
 388
 389   /*
 390     Runlength encode pixels.
 391   */
 392   assert(image != (Image *) NULL);
 393   assert(image->signature == MagickSignature);
 394   if (image->debug != MagickFalse)
 395     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
 396   assert(pixels != (const unsigned char *) NULL);
 397   assert(compressed_pixels != (unsigned char *) NULL);
 398   p=pixels;
 399   q=compressed_pixels;
 400   i=0;
 401   for (y=0; y < (ssize_t) image->rows; y++)
 402   {
 403     for (x=0; x < (ssize_t) bytes_per_line; x+=i)
 404     {
 405       /*
 406         Determine runlength.
 407       */
 408       for (i=1; ((x+i) < (ssize_t) bytes_per_line); i++)
 409         if ((i == 255) || (*(p+i) != *p))
 410           break;
 411       *q++=(unsigned char) i;
 412       *q++=(*p);
 413       p+=i;
 414     }
 415     /*
 416       End of line.
 417     */
 418     *q++=(unsigned char) 0x00;
 419     *q++=(unsigned char) 0x00;
 420     status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
 421       image->rows);
 422     if (status == MagickFalse)
 423       break;
 424   }
 425   /*
 426     End of bitmap.
 427   */
 428   *q++=(unsigned char) 0x00;
 429   *q++=(unsigned char) 0x01;
 430   return((size_t) (q-compressed_pixels));
 431 }
 432 \f
 433 /*
 434 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 435 %                                                                             %
 436 %                                                                             %
 437 %                                                                             %
 438 %   I s B M P                                                                 %
 439 %                                                                             %
 440 %                                                                             %
 441 %                                                                             %
 442 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 443 %
 444 %  IsBMP() returns MagickTrue if the image format type, identified by the
 445 %  magick string, is BMP.
 446 %
 447 %  The format of the IsBMP method is:
 448 %
 449 %      MagickBooleanType IsBMP(const unsigned char *magick,const size_t length)
 450 %
 451 %  A description of each parameter follows:
 452 %
 453 %    o magick: compare image format pattern against these bytes.
 454 %
 455 %    o length: Specifies the length of the magick string.
 456 %
 457 */
 458 static MagickBooleanType IsBMP(const unsigned char *magick,const size_t length)
 459 {
 460   if (length < 2)
 461     return(MagickFalse);
 462   if ((LocaleNCompare((char *) magick,"BA",2) == 0) ||
 463       (LocaleNCompare((char *) magick,"BM",2) == 0) ||
 464       (LocaleNCompare((char *) magick,"IC",2) == 0) ||
 465       (LocaleNCompare((char *) magick,"PI",2) == 0) ||
 466       (LocaleNCompare((char *) magick,"CI",2) == 0) ||
 467       (LocaleNCompare((char *) magick,"CP",2) == 0))
 468     return(MagickTrue);
 469   return(MagickFalse);
 470 }
 471 \f
 472 /*
 473 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 474 %                                                                             %
 475 %                                                                             %
 476 %                                                                             %
 477 %   R e a d B M P I m a g e                                                   %
 478 %                                                                             %
 479 %                                                                             %
 480 %                                                                             %
 481 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 482 %
 483 %  ReadBMPImage() reads a Microsoft Windows bitmap image file, Version
 484 %  2, 3 (for Windows or NT), or 4, and  returns it.  It allocates the memory
 485 %  necessary for the new Image structure and returns a pointer to the new
 486 %  image.
 487 %
 488 %  The format of the ReadBMPImage method is:
 489 %
 490 %      image=ReadBMPImage(image_info)
 491 %
 492 %  A description of each parameter follows:
 493 %
 494 %    o image_info: the image info.
 495 %
 496 %    o exception: return any errors or warnings in this structure.
 497 %
 498 */
 499
 500 static Image *ReadBMPImage(const ImageInfo *image_info,ExceptionInfo *exception)
 501 {
 502   BMPInfo
 503     bmp_info;
 504
 505   Image
 506     *image;
 507
 508   MagickBooleanType
 509     status;
 510
 511   MagickOffsetType
 512     offset,
 513     start_position;
 514
 515   Quantum
 516     index;
 517
 518   register Quantum
 519     *q;
 520
 521   register ssize_t
 522     i,
 523     x;
 524
 525   register unsigned char
 526     *p;
 527
 528   size_t
 529     bit,
 530     blue,
 531     bytes_per_line,
 532     green,
 533     length,
 534     opacity,
 535     red;
 536
 537   ssize_t
 538     count,
 539     y;
 540
 541   unsigned char
 542     magick[12],
 543     *pixels;
 544
 545   /*
 546     Open image file.
 547   */
 548   assert(image_info != (const ImageInfo *) NULL);
 549   assert(image_info->signature == MagickSignature);
 550   if (image_info->debug != MagickFalse)
 551     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
 552       image_info->filename);
 553   assert(exception != (ExceptionInfo *) NULL);
 554   assert(exception->signature == MagickSignature);
 555   image=AcquireImage(image_info,exception);
 556   status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
 557   if (status == MagickFalse)
 558     {
 559       image=DestroyImageList(image);
 560       return((Image *) NULL);
 561     }
 562   /*
 563     Determine if this a BMP file.
 564   */
 565   (void) ResetMagickMemory(&bmp_info,0,sizeof(bmp_info));
 566   bmp_info.ba_offset=0;
 567   start_position=0;
 568   count=ReadBlob(image,2,magick);
 569   do
 570   {
 571     PixelInfo
 572       quantum_bits;
 573
 574     PixelPacket
 575       shift;
 576
 577     size_t
 578       profile_data,
 579       profile_size;
 580
 581     /*
 582       Verify BMP identifier.
 583     */
 584     if (bmp_info.ba_offset == 0)
 585       start_position=TellBlob(image)-2;
 586     bmp_info.ba_offset=0;
 587     while (LocaleNCompare((char *) magick,"BA",2) == 0)
 588     {
 589       bmp_info.file_size=ReadBlobLSBLong(image);
 590       bmp_info.ba_offset=ReadBlobLSBLong(image);
 591       bmp_info.offset_bits=ReadBlobLSBLong(image);
 592       count=ReadBlob(image,2,magick);
 593       if (count != 2)
 594         break;
 595     }
 596     if (image->debug != MagickFalse)
 597       (void) LogMagickEvent(CoderEvent,GetMagickModule(),"  Magick: %c%c",
 598         magick[0],magick[1]);
 599     if ((count == 0) || ((LocaleNCompare((char *) magick,"BM",2) != 0) &&
 600         (LocaleNCompare((char *) magick,"CI",2) != 0)))
 601       ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 602     bmp_info.file_size=ReadBlobLSBLong(image);
 603     (void) ReadBlobLSBLong(image);
 604     bmp_info.offset_bits=ReadBlobLSBLong(image);
 605     bmp_info.size=ReadBlobLSBLong(image);
 606     if (image->debug != MagickFalse)
 607       (void) LogMagickEvent(CoderEvent,GetMagickModule(),"  BMP size: %u",
 608         bmp_info.size);
 609     if (bmp_info.size == 12)
 610       {
 611         /*
 612           OS/2 BMP image file.
 613         */
 614         bmp_info.width=(short) ReadBlobLSBShort(image);
 615         bmp_info.height=(short) ReadBlobLSBShort(image);
 616         bmp_info.planes=ReadBlobLSBShort(image);
 617         bmp_info.bits_per_pixel=ReadBlobLSBShort(image);
 618         bmp_info.x_pixels=0;
 619         bmp_info.y_pixels=0;
 620         bmp_info.number_colors=0;
 621         bmp_info.compression=BI_RGB;
 622         bmp_info.image_size=0;
 623         bmp_info.alpha_mask=0;
 624         if (image->debug != MagickFalse)
 625           {
 626             (void) LogMagickEvent(CoderEvent,GetMagickModule(),
 627               "  Format: OS/2 Bitmap");
 628             (void) LogMagickEvent(CoderEvent,GetMagickModule(),
 629               "  Geometry: %.20gx%.20g",(double) bmp_info.width,(double)
 630               bmp_info.height);
 631           }
 632       }
 633     else
 634       {
 635         /*
 636           Microsoft Windows BMP image file.
 637         */
 638         if (bmp_info.size < 40)
 639           ThrowReaderException(CorruptImageError,"NonOS2HeaderSizeError");
 640         bmp_info.width=(int) ReadBlobLSBLong(image);
 641         bmp_info.height=(int) ReadBlobLSBLong(image);
 642         bmp_info.planes=ReadBlobLSBShort(image);
 643         bmp_info.bits_per_pixel=ReadBlobLSBShort(image);
 644         bmp_info.compression=ReadBlobLSBLong(image);
 645         bmp_info.image_size=ReadBlobLSBLong(image);
 646         bmp_info.x_pixels=ReadBlobLSBLong(image);
 647         bmp_info.y_pixels=ReadBlobLSBLong(image);
 648         bmp_info.number_colors=ReadBlobLSBLong(image);
 649         bmp_info.colors_important=ReadBlobLSBLong(image);
 650         profile_data=0;
 651         profile_size=0;
 652         if (image->debug != MagickFalse)
 653           {
 654             (void) LogMagickEvent(CoderEvent,GetMagickModule(),
 655               "  Format: MS Windows bitmap");
 656             (void) LogMagickEvent(CoderEvent,GetMagickModule(),
 657               "  Geometry: %.20gx%.20g",(double) bmp_info.width,(double)
 658               bmp_info.height);
 659             (void) LogMagickEvent(CoderEvent,GetMagickModule(),
 660               "  Bits per pixel: %.20g",(double) bmp_info.bits_per_pixel);
 661             switch ((int) bmp_info.compression)
 662             {
 663               case BI_RGB:
 664               {
 665                 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
 666                   "  Compression: BI_RGB");
 667                 break;
 668               }
 669               case BI_RLE4:
 670               {
 671                 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
 672                   "  Compression: BI_RLE4");
 673                 break;
 674               }
 675               case BI_RLE8:
 676               {
 677                 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
 678                   "  Compression: BI_RLE8");
 679                 break;
 680               }
 681               case BI_BITFIELDS:
 682               {
 683                 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
 684                   "  Compression: BI_BITFIELDS");
 685                 break;
 686               }
 687               case BI_PNG:
 688               {
 689                 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
 690                   "  Compression: BI_PNG");
 691                 break;
 692               }
 693               case BI_JPEG:
 694               {
 695                 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
 696                   "  Compression: BI_JPEG");
 697                 break;
 698               }
 699               default:
 700               {
 701                 (void) LogMagickEvent(CoderEvent,GetMagickModule(),
 702                   "  Compression: UNKNOWN (%u)",bmp_info.compression);
 703               }
 704             }
 705             (void) LogMagickEvent(CoderEvent,GetMagickModule(),
 706               "  Number of colors: %u",bmp_info.number_colors);
 707           }
 708         bmp_info.red_mask=ReadBlobLSBLong(image);
 709         bmp_info.green_mask=ReadBlobLSBLong(image);
 710         bmp_info.blue_mask=ReadBlobLSBLong(image);
 711         if (bmp_info.size > 40)
 712           {
 713             double
 714               sum;
 715
 716             /*
 717               Read color management information.
 718             */
 719             bmp_info.alpha_mask=ReadBlobLSBLong(image);
 720             bmp_info.colorspace=(int) ReadBlobLSBLong(image);
 721             /*
 722               Decode 2^30 fixed point formatted CIE primaries.
 723             */
 724             bmp_info.red_primary.x=(double) ReadBlobLSBLong(image)/0x3ffffff;
 725             bmp_info.red_primary.y=(double) ReadBlobLSBLong(image)/0x3ffffff;
 726             bmp_info.red_primary.z=(double) ReadBlobLSBLong(image)/0x3ffffff;
 727             bmp_info.green_primary.x=(double) ReadBlobLSBLong(image)/0x3ffffff;
 728             bmp_info.green_primary.y=(double) ReadBlobLSBLong(image)/0x3ffffff;
 729             bmp_info.green_primary.z=(double) ReadBlobLSBLong(image)/0x3ffffff;
 730             bmp_info.blue_primary.x=(double) ReadBlobLSBLong(image)/0x3ffffff;
 731             bmp_info.blue_primary.y=(double) ReadBlobLSBLong(image)/0x3ffffff;
 732             bmp_info.blue_primary.z=(double) ReadBlobLSBLong(image)/0x3ffffff;
 733             sum=bmp_info.red_primary.x+bmp_info.red_primary.y+
 734               bmp_info.red_primary.z;
 735             image->chromaticity.red_primary.x/=sum;
 736             image->chromaticity.red_primary.y/=sum;
 737             sum=bmp_info.green_primary.x+bmp_info.green_primary.y+
 738               bmp_info.green_primary.z;
 739             image->chromaticity.green_primary.x/=sum;
 740             image->chromaticity.green_primary.y/=sum;
 741             sum=bmp_info.blue_primary.x+bmp_info.blue_primary.y+
 742               bmp_info.blue_primary.z;
 743             image->chromaticity.blue_primary.x/=sum;
 744             image->chromaticity.blue_primary.y/=sum;
 745             /*
 746               Decode 16^16 fixed point formatted gamma_scales.
 747             */
 748             bmp_info.gamma_scale.x=(double) ReadBlobLSBLong(image)/0xffff;
 749             bmp_info.gamma_scale.y=(double) ReadBlobLSBLong(image)/0xffff;
 750             bmp_info.gamma_scale.z=(double) ReadBlobLSBLong(image)/0xffff;
 751             /*
 752               Compute a single gamma from the BMP 3-channel gamma.
 753             */
 754             image->gamma=(bmp_info.gamma_scale.x+bmp_info.gamma_scale.y+
 755               bmp_info.gamma_scale.z)/3.0;
 756           }
 757         if (bmp_info.size > 108)
 758           {
 759             size_t
 760               intent;
 761
 762             /*
 763               Read BMP Version 5 color management information.
 764             */
 765             intent=ReadBlobLSBLong(image);
 766             switch ((int) intent)
 767             {
 768               case LCS_GM_BUSINESS:
 769               {
 770                 image->rendering_intent=SaturationIntent;
 771                 break;
 772               }
 773               case LCS_GM_GRAPHICS:
 774               {
 775                 image->rendering_intent=RelativeIntent;
 776                 break;
 777               }
 778               case LCS_GM_IMAGES:
 779               {
 780                 image->rendering_intent=PerceptualIntent;
 781                 break;
 782               }
 783               case LCS_GM_ABS_COLORIMETRIC:
 784               {
 785                 image->rendering_intent=AbsoluteIntent;
 786                 break;
 787               }
 788             }
 789             profile_data=ReadBlobLSBLong(image);
 790             profile_size=ReadBlobLSBLong(image);
 791             (void) profile_data;
 792             (void) profile_size;
 793             (void) ReadBlobLSBLong(image);  /* Reserved byte */
 794           }
 795       }
 796     if ((MagickSizeType) bmp_info.file_size > GetBlobSize(image))
 797       (void) ThrowMagickException(exception,GetMagickModule(),CorruptImageError,
 798         "LengthAndFilesizeDoNotMatch","`%s'",image->filename);
 799     else
 800       if ((MagickSizeType) bmp_info.file_size < GetBlobSize(image))
 801         (void) ThrowMagickException(exception,GetMagickModule(),
 802           CorruptImageWarning,"LengthAndFilesizeDoNotMatch","`%s'",
 803           image->filename);
 804     if (bmp_info.width <= 0)
 805       ThrowReaderException(CorruptImageError,"NegativeOrZeroImageSize");
 806     if (bmp_info.height == 0)
 807       ThrowReaderException(CorruptImageError,"NegativeOrZeroImageSize");
 808     if (bmp_info.planes != 1)
 809       ThrowReaderException(CorruptImageError,"StaticPlanesValueNotEqualToOne");
 810     if ((bmp_info.bits_per_pixel != 1) && (bmp_info.bits_per_pixel != 4) &&
 811         (bmp_info.bits_per_pixel != 8) && (bmp_info.bits_per_pixel != 16) &&
 812         (bmp_info.bits_per_pixel != 24) && (bmp_info.bits_per_pixel != 32))
 813       ThrowReaderException(CorruptImageError,"UnrecognizedBitsPerPixel");
 814     if (bmp_info.number_colors > (1U << bmp_info.bits_per_pixel))
 815       {
 816         if (bmp_info.bits_per_pixel < 24)
 817           ThrowReaderException(CorruptImageError,"UnrecognizedNumberOfColors");
 818         bmp_info.number_colors=0;
 819       }
 820     if ((bmp_info.compression == 1) && (bmp_info.bits_per_pixel != 8))
 821       ThrowReaderException(CorruptImageError,"UnrecognizedBitsPerPixel");
 822     if ((bmp_info.compression == 2) && (bmp_info.bits_per_pixel != 4))
 823       ThrowReaderException(CorruptImageError,"UnrecognizedBitsPerPixel");
 824     if ((bmp_info.compression == 3) && (bmp_info.bits_per_pixel < 16))
 825       ThrowReaderException(CorruptImageError,"UnrecognizedBitsPerPixel");
 826     switch (bmp_info.compression)
 827     {
 828       case BI_RGB:
 829       case BI_RLE8:
 830       case BI_RLE4:
 831       case BI_BITFIELDS:
 832         break;
 833       case BI_JPEG:
 834         ThrowReaderException(CoderError,"JPEGCompressNotSupported");
 835       case BI_PNG:
 836         ThrowReaderException(CoderError,"PNGCompressNotSupported");
 837       default:
 838         ThrowReaderException(CorruptImageError,"UnrecognizedImageCompression");
 839     }
 840     image->columns=(size_t) MagickAbsoluteValue(bmp_info.width);
 841     image->rows=(size_t) MagickAbsoluteValue(bmp_info.height);
 842     image->depth=bmp_info.bits_per_pixel <= 8 ? bmp_info.bits_per_pixel : 8;
 843     if ((bmp_info.bits_per_pixel == 16) || (bmp_info.bits_per_pixel == 32))
 844       image->matte=bmp_info.alpha_mask != 0 ? MagickTrue : MagickFalse;
 845     if ((bmp_info.number_colors != 0) || (bmp_info.bits_per_pixel < 16))
 846       {
 847         size_t
 848           one;
 849
 850         image->storage_class=PseudoClass;
 851         image->colors=bmp_info.number_colors;
 852         one=1;
 853         if (image->colors == 0)
 854           image->colors=one << bmp_info.bits_per_pixel;
 855       }
 856     if (image->storage_class == PseudoClass)
 857       {
 858         unsigned char
 859           *bmp_colormap;
 860
 861         size_t
 862           packet_size;
 863
 864         /*
 865           Read BMP raster colormap.
 866         */
 867         if (image->debug != MagickFalse)
 868           (void) LogMagickEvent(CoderEvent,GetMagickModule(),
 869             "  Reading colormap of %.20g colors",(double) image->colors);
 870         if (AcquireImageColormap(image,image->colors,exception) == MagickFalse)
 871           ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 872         bmp_colormap=(unsigned char *) AcquireQuantumMemory((size_t)
 873           image->colors,4*sizeof(*bmp_colormap));
 874         if (bmp_colormap == (unsigned char *) NULL)
 875           ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 876         if ((bmp_info.size == 12) || (bmp_info.size == 64))
 877           packet_size=3;
 878         else
 879           packet_size=4;
 880         offset=SeekBlob(image,start_position+14+bmp_info.size,SEEK_SET);
 881         if (offset < 0)
 882           ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 883         count=ReadBlob(image,packet_size*image->colors,bmp_colormap);
 884         if (count != (ssize_t) (packet_size*image->colors))
 885           ThrowReaderException(CorruptImageError,"InsufficientImageDataInFile");
 886         p=bmp_colormap;
 887         for (i=0; i < (ssize_t) image->colors; i++)
 888         {
 889           image->colormap[i].blue=ScaleCharToQuantum(*p++);
 890           image->colormap[i].green=ScaleCharToQuantum(*p++);
 891           image->colormap[i].red=ScaleCharToQuantum(*p++);
 892           if (packet_size == 4)
 893             p++;
 894         }
 895         bmp_colormap=(unsigned char *) RelinquishMagickMemory(bmp_colormap);
 896       }
 897     image->resolution.x=(double) bmp_info.x_pixels/100.0;
 898     image->resolution.y=(double) bmp_info.y_pixels/100.0;
 899     image->units=PixelsPerCentimeterResolution;
 900     if ((image_info->ping != MagickFalse) && (image_info->number_scenes != 0))
 901       if (image->scene >= (image_info->scene+image_info->number_scenes-1))
 902         break;
 903     /*
 904       Read image data.
 905     */
 906     offset=SeekBlob(image,start_position+bmp_info.offset_bits,SEEK_SET);
 907     if (offset < 0)
 908       ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 909     if (bmp_info.compression == BI_RLE4)
 910       bmp_info.bits_per_pixel<<=1;
 911     bytes_per_line=4*((image->columns*bmp_info.bits_per_pixel+31)/32);
 912     length=(size_t) bytes_per_line*image->rows;
 913     pixels=(unsigned char *) AcquireQuantumMemory((size_t) image->rows,
 914       MagickMax(bytes_per_line,image->columns+256UL)*sizeof(*pixels));
 915     if (pixels == (unsigned char *) NULL)
 916       ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 917     if ((bmp_info.compression == BI_RGB) ||
 918         (bmp_info.compression == BI_BITFIELDS))
 919       {
 920         if (image->debug != MagickFalse)
 921           (void) LogMagickEvent(CoderEvent,GetMagickModule(),
 922             "  Reading pixels (%.20g bytes)",(double) length);
 923         count=ReadBlob(image,length,pixels);
 924         if (count != (ssize_t) length)
 925           {
 926             pixels=(unsigned char *) RelinquishMagickMemory(pixels);
 927             ThrowReaderException(CorruptImageError,
 928               "InsufficientImageDataInFile");
 929           }
 930       }
 931     else
 932       {
 933         /*
 934           Convert run-length encoded raster pixels.
 935         */
 936         status=DecodeImage(image,bmp_info.compression,pixels);
 937         if (status == MagickFalse)
 938           {
 939             pixels=(unsigned char *) RelinquishMagickMemory(pixels);
 940             ThrowReaderException(CorruptImageError,
 941               "UnableToRunlengthDecodeImage");
 942           }
 943       }
 944     /*
 945       Convert BMP raster image to pixel packets.
 946     */
 947     if (bmp_info.compression == BI_RGB)
 948       {
 949         bmp_info.alpha_mask=0;
 950         bmp_info.red_mask=0x00ff0000U;
 951         bmp_info.green_mask=0x0000ff00U;
 952         bmp_info.blue_mask=0x000000ffU;
 953         if (bmp_info.bits_per_pixel == 16)
 954           {
 955             /*
 956               RGB555.
 957             */
 958             bmp_info.red_mask=0x00007c00U;
 959             bmp_info.green_mask=0x000003e0U;
 960             bmp_info.blue_mask=0x0000001fU;
 961           }
 962       }
 963     if ((bmp_info.bits_per_pixel == 16) || (bmp_info.bits_per_pixel == 32))
 964       {
 965         register size_t
 966           sample;
 967
 968         /*
 969           Get shift and quantum bits info from bitfield masks.
 970         */
 971         (void) ResetMagickMemory(&shift,0,sizeof(shift));
 972         (void) ResetMagickMemory(&quantum_bits,0,sizeof(quantum_bits));
 973         if (bmp_info.red_mask != 0)
 974           while (((bmp_info.red_mask << shift.red) & 0x80000000UL) == 0)
 975             shift.red++;
 976         if (bmp_info.green_mask != 0)
 977           while (((bmp_info.green_mask << shift.green) & 0x80000000UL) == 0)
 978             shift.green++;
 979         if (bmp_info.blue_mask != 0)
 980           while (((bmp_info.blue_mask << shift.blue) & 0x80000000UL) == 0)
 981             shift.blue++;
 982         if (bmp_info.alpha_mask != 0)
 983           while (((bmp_info.alpha_mask << shift.alpha) & 0x80000000UL) == 0)
 984             shift.alpha++;
 985         sample=shift.red;
 986         while (((bmp_info.red_mask << sample) & 0x80000000UL) != 0)
 987           sample++;
 988         quantum_bits.red=(Quantum) (sample-shift.red);
 989         sample=shift.green;
 990         while (((bmp_info.green_mask << sample) & 0x80000000UL) != 0)
 991           sample++;
 992         quantum_bits.green=(Quantum) (sample-shift.green);
 993         sample=shift.blue;
 994         while (((bmp_info.blue_mask << sample) & 0x80000000UL) != 0)
 995           sample++;
 996         quantum_bits.blue=(Quantum) (sample-shift.blue);
 997         sample=shift.alpha;
 998         while (((bmp_info.alpha_mask << sample) & 0x80000000UL) != 0)
 999           sample++;
1000         quantum_bits.alpha=(Quantum) (sample-shift.alpha);
1001       }
1002     switch (bmp_info.bits_per_pixel)
1003     {
1004       case 1:
1005       {
1006         /*
1007           Convert bitmap scanline.
1008         */
1009         for (y=(ssize_t) image->rows-1; y >= 0; y--)
1010         {
1011           p=pixels+(image->rows-y-1)*bytes_per_line;
1012           q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
1013           if (q == (Quantum *) NULL)
1014             break;
1015           for (x=0; x < ((ssize_t) image->columns-7); x+=8)
1016           {
1017             for (bit=0; bit < 8; bit++)
1018             {
1019               index=(Quantum) (((*p) & (0x80 >> bit)) != 0 ? 0x01 : 0x00);
1020               SetPixelIndex(image,index,q);
1021               q+=GetPixelChannels(image);
1022             }
1023             p++;
1024           }
1025           if ((image->columns % 8) != 0)
1026             {
1027               for (bit=0; bit < (image->columns % 8); bit++)
1028               {
1029                 index=(Quantum) (((*p) & (0x80 >> bit)) != 0 ? 0x01 : 0x00);
1030                 SetPixelIndex(image,index,q);
1031                 q+=GetPixelChannels(image);
1032               }
1033               p++;
1034             }
1035           if (SyncAuthenticPixels(image,exception) == MagickFalse)
1036             break;
1037           if (image->previous == (Image *) NULL)
1038             {
1039               status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
1040                 image->rows);
1041               if (status == MagickFalse)
1042                 break;
1043             }
1044         }
1045         (void) SyncImage(image,exception);
1046         break;
1047       }
1048       case 4:
1049       {
1050         /*
1051           Convert PseudoColor scanline.
1052         */
1053         for (y=(ssize_t) image->rows-1; y >= 0; y--)
1054         {
1055           p=pixels+(image->rows-y-1)*bytes_per_line;
1056           q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
1057           if (q == (Quantum *) NULL)
1058             break;
1059           for (x=0; x < ((ssize_t) image->columns-1); x+=2)
1060           {
1061             index=ConstrainColormapIndex(image,(*p >> 4) & 0x0f,exception);
1062             SetPixelIndex(image,index,q);
1063             q+=GetPixelChannels(image);
1064             index=ConstrainColormapIndex(image,*p & 0x0f,exception);
1065             SetPixelIndex(image,index,q);
1066             q+=GetPixelChannels(image);
1067             p++;
1068           }
1069           if ((image->columns % 2) != 0)
1070             {
1071               index=ConstrainColormapIndex(image,(*p >> 4) & 0xf,exception);
1072               SetPixelIndex(image,index,q);
1073               q+=GetPixelChannels(image);
1074               p++;
1075             }
1076           if (SyncAuthenticPixels(image,exception) == MagickFalse)
1077             break;
1078           if (image->previous == (Image *) NULL)
1079             {
1080               status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
1081                 image->rows);
1082               if (status == MagickFalse)
1083                 break;
1084             }
1085         }
1086         (void) SyncImage(image,exception);
1087         break;
1088       }
1089       case 8:
1090       {
1091         /*
1092           Convert PseudoColor scanline.
1093         */
1094         if ((bmp_info.compression == BI_RLE8) ||
1095             (bmp_info.compression == BI_RLE4))
1096           bytes_per_line=image->columns;
1097         for (y=(ssize_t) image->rows-1; y >= 0; y--)
1098         {
1099           p=pixels+(image->rows-y-1)*bytes_per_line;
1100           q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
1101           if (q == (Quantum *) NULL)
1102             break;
1103           for (x = (ssize_t)image->columns; x != 0; --x)
1104           {
1105             index=ConstrainColormapIndex(image,*p++,exception);
1106             SetPixelIndex(image,index,q);
1107             q+=GetPixelChannels(image);
1108           }
1109           if (SyncAuthenticPixels(image,exception) == MagickFalse)
1110             break;
1111           offset=(MagickOffsetType) (image->rows-y-1);
1112           if (image->previous == (Image *) NULL)
1113             {
1114               status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
1115                 image->rows);
1116               if (status == MagickFalse)
1117                 break;
1118             }
1119         }
1120         (void) SyncImage(image,exception);
1121         break;
1122       }
1123       case 16:
1124       {
1125         size_t
1126           pixel;
1127
1128         /*
1129           Convert bitfield encoded 16-bit PseudoColor scanline.
1130         */
1131         if (bmp_info.compression != BI_RGB &&
1132             bmp_info.compression != BI_BITFIELDS)
1133           {
1134             pixels=(unsigned char *) RelinquishMagickMemory(pixels);
1135             ThrowReaderException(CorruptImageError,
1136               "UnrecognizedImageCompression");
1137           }
1138         bytes_per_line=2*(image->columns+image->columns % 2);
1139         image->storage_class=DirectClass;
1140         for (y=(ssize_t) image->rows-1; y >= 0; y--)
1141         {
1142           p=pixels+(image->rows-y-1)*bytes_per_line;
1143           q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
1144           if (q == (Quantum *) NULL)
1145             break;
1146           for (x=0; x < (ssize_t) image->columns; x++)
1147           {
1148             pixel=(size_t) (*p++);
1149             pixel|=(*p++) << 8;
1150             red=((pixel & bmp_info.red_mask) << shift.red) >> 16;
1151             if (quantum_bits.red == 5)
1152               red|=((red & 0xe000) >> 5);
1153             if (quantum_bits.red <= 8)
1154               red|=((red & 0xff00) >> 8);
1155             green=((pixel & bmp_info.green_mask) << shift.green) >> 16;
1156             if (quantum_bits.green == 5)
1157               green|=((green & 0xe000) >> 5);
1158             if (quantum_bits.green == 6)
1159               green|=((green & 0xc000) >> 6);
1160             if (quantum_bits.green <= 8)
1161               green|=((green & 0xff00) >> 8);
1162             blue=((pixel & bmp_info.blue_mask) << shift.blue) >> 16;
1163             if (quantum_bits.blue == 5)
1164               blue|=((blue & 0xe000) >> 5);
1165             if (quantum_bits.blue <= 8)
1166               blue|=((blue & 0xff00) >> 8);
1167             opacity=((pixel & bmp_info.alpha_mask) << shift.alpha) >> 16;
1168             if (quantum_bits.alpha <= 8)
1169               opacity|=((opacity & 0xff00) >> 8);
1170             SetPixelRed(image,ScaleShortToQuantum((unsigned short) red),q);
1171             SetPixelGreen(image,ScaleShortToQuantum((unsigned short) green),q);
1172             SetPixelBlue(image,ScaleShortToQuantum((unsigned short) blue),q);
1173             SetPixelAlpha(image,OpaqueAlpha,q);
1174             if (image->matte != MagickFalse)
1175               SetPixelAlpha(image,
1176                 ScaleShortToQuantum((unsigned short) opacity),q);
1177             q+=GetPixelChannels(image);
1178           }
1179           if (SyncAuthenticPixels(image,exception) == MagickFalse)
1180             break;
1181           offset=(MagickOffsetType) (image->rows-y-1);
1182           if (image->previous == (Image *) NULL)
1183             {
1184               status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
1185                 image->rows);
1186               if (status == MagickFalse)
1187                 break;
1188             }
1189         }
1190         break;
1191       }
1192       case 24:
1193       {
1194         /*
1195           Convert DirectColor scanline.
1196         */
1197         bytes_per_line=4*((image->columns*24+31)/32);
1198         for (y=(ssize_t) image->rows-1; y >= 0; y--)
1199         {
1200           p=pixels+(image->rows-y-1)*bytes_per_line;
1201           q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
1202           if (q == (Quantum *) NULL)
1203             break;
1204           for (x=0; x < (ssize_t) image->columns; x++)
1205           {
1206             SetPixelBlue(image,ScaleCharToQuantum(*p++),q);
1207             SetPixelGreen(image,ScaleCharToQuantum(*p++),q);
1208             SetPixelRed(image,ScaleCharToQuantum(*p++),q);
1209             SetPixelAlpha(image,OpaqueAlpha,q);
1210             q+=GetPixelChannels(image);
1211           }
1212           if (SyncAuthenticPixels(image,exception) == MagickFalse)
1213             break;
1214           offset=(MagickOffsetType) (image->rows-y-1);
1215           if (image->previous == (Image *) NULL)
1216             {
1217               status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
1218                 image->rows);
1219               if (status == MagickFalse)
1220                 break;
1221             }
1222         }
1223         break;
1224       }
1225       case 32:
1226       {
1227         /*
1228           Convert bitfield encoded DirectColor scanline.
1229         */
1230         if ((bmp_info.compression != BI_RGB) &&
1231             (bmp_info.compression != BI_BITFIELDS))
1232           {
1233             pixels=(unsigned char *) RelinquishMagickMemory(pixels);
1234             ThrowReaderException(CorruptImageError,
1235               "UnrecognizedImageCompression");
1236           }
1237         bytes_per_line=4*(image->columns);
1238         for (y=(ssize_t) image->rows-1; y >= 0; y--)
1239         {
1240           size_t
1241             pixel;
1242
1243           p=pixels+(image->rows-y-1)*bytes_per_line;
1244           q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
1245           if (q == (Quantum *) NULL)
1246             break;
1247           for (x=0; x < (ssize_t) image->columns; x++)
1248           {
1249             pixel=(size_t) (*p++);
1250             pixel|=(*p++ << 8);
1251             pixel|=(*p++ << 16);
1252             pixel|=(*p++ << 24);
1253             red=((pixel & bmp_info.red_mask) << shift.red) >> 16;
1254             if (quantum_bits.red == 8)
1255               red|=(red >> 8);
1256             green=((pixel & bmp_info.green_mask) << shift.green) >> 16;
1257             if (quantum_bits.green == 8)
1258               green|=(green >> 8);
1259             blue=((pixel & bmp_info.blue_mask) << shift.blue) >> 16;
1260             if (quantum_bits.blue == 8)
1261               blue|=(blue >> 8);
1262             opacity=((pixel & bmp_info.alpha_mask) << shift.alpha) >> 16;
1263             if (quantum_bits.alpha == 8)
1264               opacity|=(opacity >> 8);
1265             SetPixelRed(image,ScaleShortToQuantum((unsigned short) red),q);
1266             SetPixelGreen(image,ScaleShortToQuantum((unsigned short) green),q);
1267             SetPixelBlue(image,ScaleShortToQuantum((unsigned short) blue),q);
1268             SetPixelAlpha(image,OpaqueAlpha,q);
1269             if (image->matte != MagickFalse)
1270               SetPixelAlpha(image,
1271                 ScaleShortToQuantum((unsigned short) opacity),q);
1272             q+=GetPixelChannels(image);
1273           }
1274           if (SyncAuthenticPixels(image,exception) == MagickFalse)
1275             break;
1276           offset=(MagickOffsetType) (image->rows-y-1);
1277           if (image->previous == (Image *) NULL)
1278             {
1279               status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
1280                 image->rows);
1281               if (status == MagickFalse)
1282                 break;
1283             }
1284         }
1285         break;
1286       }
1287       default:
1288       {
1289         pixels=(unsigned char *) RelinquishMagickMemory(pixels);
1290         ThrowReaderException(CorruptImageError,"ImproperImageHeader");
1291       }
1292     }
1293     pixels=(unsigned char *) RelinquishMagickMemory(pixels);
1294     if (EOFBlob(image) != MagickFalse)
1295       {
1296         ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
1297           image->filename);
1298         break;
1299       }
1300     if (bmp_info.height < 0)
1301       {
1302         Image
1303           *flipped_image;
1304
1305         /*
1306           Correct image orientation.
1307         */
1308         flipped_image=FlipImage(image,exception);
1309         if (flipped_image != (Image *) NULL)
1310           {
1311             DuplicateBlob(flipped_image,image);
1312             image=DestroyImage(image);
1313             image=flipped_image;
1314           }
1315       }
1316     /*
1317       Proceed to next image.
1318     */
1319     if (image_info->number_scenes != 0)
1320       if (image->scene >= (image_info->scene+image_info->number_scenes-1))
1321         break;
1322     *magick='\0';
1323     if (bmp_info.ba_offset != 0)
1324       {
1325         offset=SeekBlob(image,(MagickOffsetType) bmp_info.ba_offset,SEEK_SET);
1326         if (offset < 0)
1327           ThrowReaderException(CorruptImageError,"ImproperImageHeader");
1328       }
1329     count=ReadBlob(image,2,magick);
1330     if ((count == 2) && (IsBMP(magick,2) != MagickFalse))
1331       {
1332         /*
1333           Acquire next image structure.
1334         */
1335         AcquireNextImage(image_info,image,exception);
1336         if (GetNextImageInList(image) == (Image *) NULL)
1337           {
1338             image=DestroyImageList(image);
1339             return((Image *) NULL);
1340           }
1341         image=SyncNextImageInList(image);
1342         status=SetImageProgress(image,LoadImagesTag,TellBlob(image),
1343           GetBlobSize(image));
1344         if (status == MagickFalse)
1345           break;
1346       }
1347   } while (IsBMP(magick,2) != MagickFalse);
1348   (void) CloseBlob(image);
1349   return(GetFirstImageInList(image));
1350 }
1351 \f
1352 /*
1353 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1354 %                                                                             %
1355 %                                                                             %
1356 %                                                                             %
1357 %   R e g i s t e r B M P I m a g e                                           %
1358 %                                                                             %
1359 %                                                                             %
1360 %                                                                             %
1361 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1362 %
1363 %  RegisterBMPImage() adds attributes for the BMP image format to
1364 %  the list of supported formats.  The attributes include the image format
1365 %  tag, a method to read and/or write the format, whether the format
1366 %  supports the saving of more than one frame to the same file or blob,
1367 %  whether the format supports native in-memory I/O, and a brief
1368 %  description of the format.
1369 %
1370 %  The format of the RegisterBMPImage method is:
1371 %
1372 %      size_t RegisterBMPImage(void)
1373 %
1374 */
1375 ModuleExport size_t RegisterBMPImage(void)
1376 {
1377   MagickInfo
1378     *entry;
1379
1380   entry=SetMagickInfo("BMP");
1381   entry->decoder=(DecodeImageHandler *) ReadBMPImage;
1382   entry->encoder=(EncodeImageHandler *) WriteBMPImage;
1383   entry->magick=(IsImageFormatHandler *) IsBMP;
1384   entry->description=ConstantString("Microsoft Windows bitmap image");
1385   entry->module=ConstantString("BMP");
1386   entry->adjoin=MagickFalse;
1387   entry->seekable_stream=MagickTrue;
1388   (void) RegisterMagickInfo(entry);
1389   entry=SetMagickInfo("BMP2");
1390   entry->encoder=(EncodeImageHandler *) WriteBMPImage;
1391   entry->magick=(IsImageFormatHandler *) IsBMP;
1392   entry->description=ConstantString("Microsoft Windows bitmap image (V2)");
1393   entry->module=ConstantString("BMP");
1394   entry->adjoin=MagickFalse;
1395   entry->seekable_stream=MagickTrue;
1396   (void) RegisterMagickInfo(entry);
1397   entry=SetMagickInfo("BMP3");
1398   entry->encoder=(EncodeImageHandler *) WriteBMPImage;
1399   entry->magick=(IsImageFormatHandler *) IsBMP;
1400   entry->description=ConstantString("Microsoft Windows bitmap image (V3)");
1401   entry->module=ConstantString("BMP");
1402   entry->adjoin=MagickFalse;
1403   entry->seekable_stream=MagickTrue;
1404   (void) RegisterMagickInfo(entry);
1405   return(MagickImageCoderSignature);
1406 }
1407 \f
1408 /*
1409 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1410 %                                                                             %
1411 %                                                                             %
1412 %                                                                             %
1413 %   U n r e g i s t e r B M P I m a g e                                       %
1414 %                                                                             %
1415 %                                                                             %
1416 %                                                                             %
1417 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1418 %
1419 %  UnregisterBMPImage() removes format registrations made by the
1420 %  BMP module from the list of supported formats.
1421 %
1422 %  The format of the UnregisterBMPImage method is:
1423 %
1424 %      UnregisterBMPImage(void)
1425 %
1426 */
1427 ModuleExport void UnregisterBMPImage(void)
1428 {
1429   (void) UnregisterMagickInfo("BMP");
1430   (void) UnregisterMagickInfo("BMP2");
1431   (void) UnregisterMagickInfo("BMP3");
1432 }
1433 \f
1434 /*
1435 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1436 %                                                                             %
1437 %                                                                             %
1438 %                                                                             %
1439 %   W r i t e B M P I m a g e                                                 %
1440 %                                                                             %
1441 %                                                                             %
1442 %                                                                             %
1443 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1444 %
1445 %  WriteBMPImage() writes an image in Microsoft Windows bitmap encoded
1446 %  image format, version 3 for Windows or (if the image has a matte channel)
1447 %  version 4.
1448 %
1449 %  The format of the WriteBMPImage method is:
1450 %
1451 %      MagickBooleanType WriteBMPImage(const ImageInfo *image_info,
1452 %        Image *image,ExceptionInfo *exception)
1453 %
1454 %  A description of each parameter follows.
1455 %
1456 %    o image_info: the image info.
1457 %
1458 %    o image:  The image.
1459 %
1460 %    o exception: return any errors or warnings in this structure.
1461 %
1462 */
1463 static MagickBooleanType WriteBMPImage(const ImageInfo *image_info,Image *image,
1464   ExceptionInfo *exception)
1465 {
1466   BMPInfo
1467     bmp_info;
1468
1469   const StringInfo
1470     *profile;
1471
1472   MagickBooleanType
1473     have_color_info,
1474     status;
1475
1476   MagickOffsetType
1477     scene;
1478
1479   register const Quantum
1480     *p;
1481
1482   register ssize_t
1483     i,
1484     x;
1485
1486   register unsigned char
1487     *q;
1488
1489   size_t
1490     bytes_per_line,
1491     type;
1492
1493   ssize_t
1494     y;
1495
1496   unsigned char
1497     *bmp_data,
1498     *pixels;
1499
1500   /*
1501     Open output image file.
1502   */
1503   assert(image_info != (const ImageInfo *) NULL);
1504   assert(image_info->signature == MagickSignature);
1505   assert(image != (Image *) NULL);
1506   assert(image->signature == MagickSignature);
1507   if (image->debug != MagickFalse)
1508     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
1509   assert(exception != (ExceptionInfo *) NULL);
1510   assert(exception->signature == MagickSignature);
1511   status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
1512   if (status == MagickFalse)
1513     return(status);
1514   type=4;
1515   if (LocaleCompare(image_info->magick,"BMP2") == 0)
1516     type=2;
1517   else
1518     if (LocaleCompare(image_info->magick,"BMP3") == 0)
1519       type=3;
1520   scene=0;
1521   do
1522   {
1523     /*
1524       Initialize BMP raster file header.
1525     */
1526     if (IssRGBColorspace(image->colorspace) == MagickFalse)
1527       (void) TransformImageColorspace(image,sRGBColorspace,exception);
1528     (void) ResetMagickMemory(&bmp_info,0,sizeof(bmp_info));
1529     bmp_info.file_size=14+12;
1530     if (type > 2)
1531       bmp_info.file_size+=28;
1532     bmp_info.offset_bits=bmp_info.file_size;
1533     bmp_info.compression=BI_RGB;
1534     if ((image->storage_class == PseudoClass) && (image->colors > 256))
1535       (void) SetImageStorageClass(image,DirectClass,exception);
1536     if (image->storage_class != DirectClass)
1537       {
1538         /*
1539           Colormapped BMP raster.
1540         */
1541         bmp_info.bits_per_pixel=8;
1542         if (image->colors <= 2)
1543           bmp_info.bits_per_pixel=1;
1544         else
1545           if (image->colors <= 16)
1546             bmp_info.bits_per_pixel=4;
1547           else
1548             if (image->colors <= 256)
1549               bmp_info.bits_per_pixel=8;
1550         if (image_info->compression == RLECompression)
1551           bmp_info.bits_per_pixel=8;
1552         bmp_info.number_colors=1U << bmp_info.bits_per_pixel;
1553         if (image->matte != MagickFalse)
1554           (void) SetImageStorageClass(image,DirectClass,exception);
1555         else
1556           if ((size_t) bmp_info.number_colors < image->colors)
1557             (void) SetImageStorageClass(image,DirectClass,exception);
1558           else
1559             {
1560               bmp_info.file_size+=3*(1UL << bmp_info.bits_per_pixel);
1561               bmp_info.offset_bits+=3*(1UL << bmp_info.bits_per_pixel);
1562               if (type > 2)
1563                 {
1564                   bmp_info.file_size+=(1UL << bmp_info.bits_per_pixel);
1565                   bmp_info.offset_bits+=(1UL << bmp_info.bits_per_pixel);
1566                 }
1567             }
1568       }
1569     if (image->storage_class == DirectClass)
1570       {
1571         /*
1572           Full color BMP raster.
1573         */
1574         bmp_info.number_colors=0;
1575         bmp_info.bits_per_pixel=(unsigned short)
1576           ((type > 3) && (image->matte != MagickFalse) ? 32 : 24);
1577         bmp_info.compression=(unsigned int) ((type > 3) &&
1578           (image->matte != MagickFalse) ?  BI_BITFIELDS : BI_RGB);
1579       }
1580     bytes_per_line=4*((image->columns*bmp_info.bits_per_pixel+31)/32);
1581     bmp_info.ba_offset=0;
1582     profile=GetImageProfile(image,"icc");
1583     have_color_info=(image->rendering_intent != UndefinedIntent) ||
1584       (profile != (StringInfo *) NULL) || (image->gamma != 0.0) ?  MagickTrue :
1585       MagickFalse;
1586     if (type == 2)
1587       bmp_info.size=12;
1588     else
1589       if ((type == 3) || ((image->matte == MagickFalse) &&
1590           (have_color_info == MagickFalse)))
1591         {
1592           type=3;
1593           bmp_info.size=40;
1594         }
1595       else
1596         {
1597           int
1598             extra_size;
1599
1600           bmp_info.size=108;
1601           extra_size=68;
1602           if ((image->rendering_intent != UndefinedIntent) ||
1603               (profile != (StringInfo *) NULL))
1604             {
1605               bmp_info.size=124;
1606               extra_size+=16;
1607             }
1608           bmp_info.file_size+=extra_size;
1609           bmp_info.offset_bits+=extra_size;
1610         }
1611     bmp_info.width=(ssize_t) image->columns;
1612     bmp_info.height=(ssize_t) image->rows;
1613     bmp_info.planes=1;
1614     bmp_info.image_size=(unsigned int) (bytes_per_line*image->rows);
1615     bmp_info.file_size+=bmp_info.image_size;
1616     bmp_info.x_pixels=75*39;
1617     bmp_info.y_pixels=75*39;
1618     switch (image->units)
1619     {
1620       case UndefinedResolution:
1621       case PixelsPerInchResolution:
1622       {
1623         bmp_info.x_pixels=(unsigned int) (100.0*image->resolution.x/2.54);
1624         bmp_info.y_pixels=(unsigned int) (100.0*image->resolution.y/2.54);
1625         break;
1626       }
1627       case PixelsPerCentimeterResolution:
1628       {
1629         bmp_info.x_pixels=(unsigned int) (100.0*image->resolution.x);
1630         bmp_info.y_pixels=(unsigned int) (100.0*image->resolution.y);
1631         break;
1632       }
1633     }
1634     bmp_info.colors_important=bmp_info.number_colors;
1635     /*
1636       Convert MIFF to BMP raster pixels.
1637     */
1638     pixels=(unsigned char *) AcquireQuantumMemory((size_t) bmp_info.image_size,
1639       sizeof(*pixels));
1640     if (pixels == (unsigned char *) NULL)
1641       ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
1642     (void) ResetMagickMemory(pixels,0,(size_t) bmp_info.image_size);
1643     switch (bmp_info.bits_per_pixel)
1644     {
1645       case 1:
1646       {
1647         size_t
1648           bit,
1649           byte;
1650
1651         /*
1652           Convert PseudoClass image to a BMP monochrome image.
1653         */
1654         for (y=0; y < (ssize_t) image->rows; y++)
1655         {
1656           ssize_t
1657             offset;
1658
1659           p=GetVirtualPixels(image,0,y,image->columns,1,exception);
1660           if (p == (const Quantum *) NULL)
1661             break;
1662           q=pixels+(image->rows-y-1)*bytes_per_line;
1663           bit=0;
1664           byte=0;
1665           for (x=0; x < (ssize_t) image->columns; x++)
1666           {
1667             byte<<=1;
1668             byte|=GetPixelIndex(image,p) != 0 ? 0x01 : 0x00;
1669             bit++;
1670             if (bit == 8)
1671               {
1672                 *q++=(unsigned char) byte;
1673                 bit=0;
1674                 byte=0;
1675               }
1676              p+=GetPixelChannels(image);
1677            }
1678            if (bit != 0)
1679              {
1680                *q++=(unsigned char) (byte << (8-bit));
1681                x++;
1682              }
1683           offset=(ssize_t) (image->columns+7)/8;
1684           for (x=offset; x < (ssize_t) bytes_per_line; x++)
1685             *q++=0x00;
1686           if (image->previous == (Image *) NULL)
1687             {
1688               status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
1689                 image->rows);
1690               if (status == MagickFalse)
1691                 break;
1692             }
1693         }
1694         break;
1695       }
1696       case 4:
1697       {
1698         size_t
1699           byte,
1700           nibble,
1701           offset;
1702
1703         /*
1704           Convert PseudoClass image to a BMP monochrome image.
1705         */
1706         for (y=0; y < (ssize_t) image->rows; y++)
1707         {
1708           p=GetVirtualPixels(image,0,y,image->columns,1,exception);
1709           if (p == (const Quantum *) NULL)
1710             break;
1711           q=pixels+(image->rows-y-1)*bytes_per_line;
1712           nibble=0;
1713           byte=0;
1714           for (x=0; x < (ssize_t) image->columns; x++)
1715           {
1716             byte<<=4;
1717             byte|=((size_t) GetPixelIndex(image,p) & 0x0f);
1718             nibble++;
1719             if (nibble == 2)
1720               {
1721                 *q++=(unsigned char) byte;
1722                 nibble=0;
1723                 byte=0;
1724               }
1725             p+=GetPixelChannels(image);
1726           }
1727           if (nibble != 0)
1728             {
1729               *q++=(unsigned char) (byte << 4);
1730               x++;
1731             }
1732           offset=(ssize_t) (image->columns+1)/2;
1733           for (x=offset; x < (ssize_t) bytes_per_line; x++)
1734             *q++=0x00;
1735           if (image->previous == (Image *) NULL)
1736             {
1737               status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
1738                 image->rows);
1739               if (status == MagickFalse)
1740                 break;
1741             }
1742         }
1743         break;
1744       }
1745       case 8:
1746       {
1747         /*
1748           Convert PseudoClass packet to BMP pixel.
1749         */
1750         for (y=0; y < (ssize_t) image->rows; y++)
1751         {
1752           p=GetVirtualPixels(image,0,y,image->columns,1,exception);
1753           if (p == (const Quantum *) NULL)
1754             break;
1755           q=pixels+(image->rows-y-1)*bytes_per_line;
1756           for (x=0; x < (ssize_t) image->columns; x++)
1757           {
1758             *q++=(unsigned char) GetPixelIndex(image,p);
1759             p+=GetPixelChannels(image);
1760           }
1761           for ( ; x < (ssize_t) bytes_per_line; x++)
1762             *q++=0x00;
1763           if (image->previous == (Image *) NULL)
1764             {
1765               status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
1766                 image->rows);
1767               if (status == MagickFalse)
1768                 break;
1769             }
1770         }
1771         break;
1772       }
1773       case 24:
1774       {
1775         /*
1776           Convert DirectClass packet to BMP BGR888.
1777         */
1778         for (y=0; y < (ssize_t) image->rows; y++)
1779         {
1780           p=GetVirtualPixels(image,0,y,image->columns,1,exception);
1781           if (p == (const Quantum *) NULL)
1782             break;
1783           q=pixels+(image->rows-y-1)*bytes_per_line;
1784           for (x=0; x < (ssize_t) image->columns; x++)
1785           {
1786             *q++=ScaleQuantumToChar(GetPixelBlue(image,p));
1787             *q++=ScaleQuantumToChar(GetPixelGreen(image,p));
1788             *q++=ScaleQuantumToChar(GetPixelRed(image,p));
1789             p+=GetPixelChannels(image);
1790           }
1791           for (x=3L*(ssize_t) image->columns; x < (ssize_t) bytes_per_line; x++)
1792             *q++=0x00;
1793           if (image->previous == (Image *) NULL)
1794             {
1795               status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
1796                 image->rows);
1797               if (status == MagickFalse)
1798                 break;
1799             }
1800         }
1801         break;
1802       }
1803       case 32:
1804       {
1805         /*
1806           Convert DirectClass packet to ARGB8888 pixel.
1807         */
1808         for (y=0; y < (ssize_t) image->rows; y++)
1809         {
1810           p=GetVirtualPixels(image,0,y,image->columns,1,exception);
1811           if (p == (const Quantum *) NULL)
1812             break;
1813           q=pixels+(image->rows-y-1)*bytes_per_line;
1814           for (x=0; x < (ssize_t) image->columns; x++)
1815           {
1816             *q++=ScaleQuantumToChar(GetPixelBlue(image,p));
1817             *q++=ScaleQuantumToChar(GetPixelGreen(image,p));
1818             *q++=ScaleQuantumToChar(GetPixelRed(image,p));
1819             *q++=ScaleQuantumToChar(GetPixelAlpha(image,p));
1820             p+=GetPixelChannels(image);
1821           }
1822           if (image->previous == (Image *) NULL)
1823             {
1824               status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
1825                 image->rows);
1826               if (status == MagickFalse)
1827                 break;
1828             }
1829         }
1830         break;
1831       }
1832     }
1833     if ((type > 2) && (bmp_info.bits_per_pixel == 8))
1834       if (image_info->compression != NoCompression)
1835         {
1836           size_t
1837             length;
1838
1839           /*
1840             Convert run-length encoded raster pixels.
1841           */
1842           length=(size_t) (2*(bytes_per_line+2)*(image->rows+2)+2);
1843           bmp_data=(unsigned char *) NULL;
1844           if (~length >= bytes_per_line)
1845             bmp_data=(unsigned char *) AcquireQuantumMemory(length+
1846               bytes_per_line,sizeof(*bmp_data));
1847           if (bmp_data == (unsigned char *) NULL)
1848             {
1849               pixels=(unsigned char *) RelinquishMagickMemory(pixels);
1850               ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
1851             }
1852           bmp_info.file_size-=bmp_info.image_size;
1853           bmp_info.image_size=(unsigned int) EncodeImage(image,bytes_per_line,
1854             pixels,bmp_data);
1855           bmp_info.file_size+=bmp_info.image_size;
1856           pixels=(unsigned char *) RelinquishMagickMemory(pixels);
1857           pixels=bmp_data;
1858           bmp_info.compression=BI_RLE8;
1859         }
1860     /*
1861       Write BMP for Windows, all versions, 14-byte header.
1862     */
1863     if (image->debug != MagickFalse)
1864       {
1865         (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1866           "   Writing BMP version %.20g datastream",(double) type);
1867         if (image->storage_class == DirectClass)
1868           (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1869             "   Storage class=DirectClass");
1870         else
1871           (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1872             "   Storage class=PseudoClass");
1873         (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1874           "   Image depth=%.20g",(double) image->depth);
1875         if (image->matte != MagickFalse)
1876           (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1877             "   Matte=True");
1878         else
1879           (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1880             "   Matte=MagickFalse");
1881         (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1882           "   BMP bits_per_pixel=%.20g",(double) bmp_info.bits_per_pixel);
1883         switch ((int) bmp_info.compression)
1884         {
1885            case BI_RGB:
1886            {
1887              (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1888                "   Compression=BI_RGB");
1889              break;
1890            }
1891            case BI_RLE8:
1892            {
1893              (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1894                "   Compression=BI_RLE8");
1895              break;
1896            }
1897            case BI_BITFIELDS:
1898            {
1899              (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1900                "   Compression=BI_BITFIELDS");
1901              break;
1902            }
1903            default:
1904            {
1905              (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1906                "   Compression=UNKNOWN (%u)",bmp_info.compression);
1907              break;
1908            }
1909         }
1910         if (bmp_info.number_colors == 0)
1911           (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1912             "   Number_colors=unspecified");
1913         else
1914           (void) LogMagickEvent(CoderEvent,GetMagickModule(),
1915             "   Number_colors=%u",bmp_info.number_colors);
1916       }
1917     (void) WriteBlob(image,2,(unsigned char *) "BM");
1918     (void) WriteBlobLSBLong(image,bmp_info.file_size);
1919     (void) WriteBlobLSBLong(image,bmp_info.ba_offset);  /* always 0 */
1920     (void) WriteBlobLSBLong(image,bmp_info.offset_bits);
1921     if (type == 2)
1922       {
1923         /*
1924           Write 12-byte version 2 bitmap header.
1925         */
1926         (void) WriteBlobLSBLong(image,bmp_info.size);
1927         (void) WriteBlobLSBShort(image,(unsigned short) bmp_info.width);
1928         (void) WriteBlobLSBShort(image,(unsigned short) bmp_info.height);
1929         (void) WriteBlobLSBShort(image,bmp_info.planes);
1930         (void) WriteBlobLSBShort(image,bmp_info.bits_per_pixel);
1931       }
1932     else
1933       {
1934         /*
1935           Write 40-byte version 3+ bitmap header.
1936         */
1937         (void) WriteBlobLSBLong(image,bmp_info.size);
1938         (void) WriteBlobLSBLong(image,(unsigned int) bmp_info.width);
1939         (void) WriteBlobLSBLong(image,(unsigned int) bmp_info.height);
1940         (void) WriteBlobLSBShort(image,bmp_info.planes);
1941         (void) WriteBlobLSBShort(image,bmp_info.bits_per_pixel);
1942         (void) WriteBlobLSBLong(image,bmp_info.compression);
1943         (void) WriteBlobLSBLong(image,bmp_info.image_size);
1944         (void) WriteBlobLSBLong(image,bmp_info.x_pixels);
1945         (void) WriteBlobLSBLong(image,bmp_info.y_pixels);
1946         (void) WriteBlobLSBLong(image,bmp_info.number_colors);
1947         (void) WriteBlobLSBLong(image,bmp_info.colors_important);
1948       }
1949     if ((type > 3) && ((image->matte != MagickFalse) ||
1950         (have_color_info != MagickFalse)))
1951       {
1952         /*
1953           Write the rest of the 108-byte BMP Version 4 header.
1954         */
1955         (void) WriteBlobLSBLong(image,0x00ff0000U);  /* Red mask */
1956         (void) WriteBlobLSBLong(image,0x0000ff00U);  /* Green mask */
1957         (void) WriteBlobLSBLong(image,0x000000ffU);  /* Blue mask */
1958         (void) WriteBlobLSBLong(image,0xff000000U);  /* Alpha mask */
1959         (void) WriteBlobLSBLong(image,0x73524742U);  /* sRGB */
1960         (void) WriteBlobLSBLong(image,(unsigned int)
1961           image->chromaticity.red_primary.x*0x3ffffff);
1962         (void) WriteBlobLSBLong(image,(unsigned int)
1963           image->chromaticity.red_primary.y*0x3ffffff);
1964         (void) WriteBlobLSBLong(image,(unsigned int)
1965           (1.000f-(image->chromaticity.red_primary.x+
1966           image->chromaticity.red_primary.y)*0x3ffffff));
1967         (void) WriteBlobLSBLong(image,(unsigned int)
1968           image->chromaticity.green_primary.x*0x3ffffff);
1969         (void) WriteBlobLSBLong(image,(unsigned int)
1970           image->chromaticity.green_primary.y*0x3ffffff);
1971         (void) WriteBlobLSBLong(image,(unsigned int)
1972           (1.000f-(image->chromaticity.green_primary.x+
1973           image->chromaticity.green_primary.y)*0x3ffffff));
1974         (void) WriteBlobLSBLong(image,(unsigned int)
1975           image->chromaticity.blue_primary.x*0x3ffffff);
1976         (void) WriteBlobLSBLong(image,(unsigned int)
1977           image->chromaticity.blue_primary.y*0x3ffffff);
1978         (void) WriteBlobLSBLong(image,(unsigned int)
1979           (1.000f-(image->chromaticity.blue_primary.x+
1980           image->chromaticity.blue_primary.y)*0x3ffffff));
1981         (void) WriteBlobLSBLong(image,(unsigned int)
1982           bmp_info.gamma_scale.x*0xffff);
1983         (void) WriteBlobLSBLong(image,(unsigned int)
1984           bmp_info.gamma_scale.y*0xffff);
1985         (void) WriteBlobLSBLong(image,(unsigned int)
1986           bmp_info.gamma_scale.z*0xffff);
1987         if ((image->rendering_intent != UndefinedIntent) ||
1988             (profile != (StringInfo *) NULL))
1989           {
1990             ssize_t
1991               intent;
1992
1993             switch ((int) image->rendering_intent)
1994             {
1995               case SaturationIntent:
1996               {
1997                 intent=LCS_GM_BUSINESS;
1998                 break;
1999               }
2000               case RelativeIntent:
2001               {
2002                 intent=LCS_GM_GRAPHICS;
2003                 break;
2004               }
2005               case PerceptualIntent:
2006               {
2007                 intent=LCS_GM_IMAGES;
2008                 break;
2009               }
2010               case AbsoluteIntent:
2011               {
2012                 intent=LCS_GM_ABS_COLORIMETRIC;
2013                 break;
2014               }
2015               default:
2016               {
2017                 intent=0;
2018                 break;
2019               }
2020             }
2021             (void) WriteBlobLSBLong(image,(unsigned int) intent);
2022             (void) WriteBlobLSBLong(image,0x00);  /* dummy profile data */
2023             (void) WriteBlobLSBLong(image,0x00);  /* dummy profile length */
2024             (void) WriteBlobLSBLong(image,0x00);  /* reserved */
2025           }
2026       }
2027     if (image->storage_class == PseudoClass)
2028       {
2029         unsigned char
2030           *bmp_colormap;
2031
2032         /*
2033           Dump colormap to file.
2034         */
2035         if (image->debug != MagickFalse)
2036           (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2037             "  Colormap: %.20g entries",(double) image->colors);
2038         bmp_colormap=(unsigned char *) AcquireQuantumMemory((size_t) (1UL <<
2039           bmp_info.bits_per_pixel),4*sizeof(*bmp_colormap));
2040         if (bmp_colormap == (unsigned char *) NULL)
2041           ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
2042         q=bmp_colormap;
2043         for (i=0; i < (ssize_t) MagickMin((ssize_t) image->colors,(ssize_t) bmp_info.number_colors); i++)
2044         {
2045           *q++=ScaleQuantumToChar(image->colormap[i].blue);
2046           *q++=ScaleQuantumToChar(image->colormap[i].green);
2047           *q++=ScaleQuantumToChar(image->colormap[i].red);
2048           if (type > 2)
2049             *q++=(unsigned char) 0x0;
2050         }
2051         for ( ; i < (ssize_t) (1UL << bmp_info.bits_per_pixel); i++)
2052         {
2053           *q++=(unsigned char) 0x00;
2054           *q++=(unsigned char) 0x00;
2055           *q++=(unsigned char) 0x00;
2056           if (type > 2)
2057             *q++=(unsigned char) 0x00;
2058         }
2059         if (type <= 2)
2060           (void) WriteBlob(image,(size_t) (3*(1L << bmp_info.bits_per_pixel)),
2061             bmp_colormap);
2062         else
2063           (void) WriteBlob(image,(size_t) (4*(1L << bmp_info.bits_per_pixel)),
2064             bmp_colormap);
2065         bmp_colormap=(unsigned char *) RelinquishMagickMemory(bmp_colormap);
2066       }
2067     if (image->debug != MagickFalse)
2068       (void) LogMagickEvent(CoderEvent,GetMagickModule(),
2069         "  Pixels:  %u bytes",bmp_info.image_size);
2070     (void) WriteBlob(image,(size_t) bmp_info.image_size,pixels);
2071     pixels=(unsigned char *) RelinquishMagickMemory(pixels);
2072     if (GetNextImageInList(image) == (Image *) NULL)
2073       break;
2074     image=SyncNextImageInList(image);
2075     status=SetImageProgress(image,SaveImagesTag,scene++,
2076       GetImageListLength(image));
2077     if (status == MagickFalse)
2078       break;
2079   } while (image_info->adjoin != MagickFalse);
2080   (void) CloseBlob(image);
2081   return(MagickTrue);
2082 }