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

   1 /*
   2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   3 %                                                                             %
   4 %                                                                             %
   5 %                                                                             %
   6 %                        IIIII   CCCC   OOO   N   N                           %
   7 %                          I    C      O   O  NN  N                           %
   8 %                          I    C      O   O  N N N                           %
   9 %                          I    C      O   O  N  NN                           %
  10 %                        IIIII   CCCC   OOO   N   N                           %
  11 %                                                                             %
  12 %                                                                             %
  13 %                   Read Microsoft Windows Icon Format                        %
  14 %                                                                             %
  15 %                              Software Design                                %
  16 %                                   Cristy                                    %
  17 %                                 July 1992                                   %
  18 %                                                                             %
  19 %                                                                             %
  20 %  Copyright 1999-2015 ImageMagick Studio LLC, a non-profit organization      %
  21 %  dedicated to making software imaging solutions freely available.           %
  22 %                                                                             %
  23 %  You may not use this file except in compliance with the License.  You may  %
  24 %  obtain a copy of the License at                                            %
  25 %                                                                             %
  26 %    http://www.imagemagick.org/script/license.php                            %
  27 %                                                                             %
  28 %  Unless required by applicable law or agreed to in writing, software        %
  29 %  distributed under the License is distributed on an "AS IS" BASIS,          %
  30 %  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.   %
  31 %  See the License for the specific language governing permissions and        %
  32 %  limitations under the License.                                             %
  33 %                                                                             %
  34 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  35 %
  36 %
  37 */
  38 \f
  39 /*
  40   Include declarations.
  41 */
  42 #include "MagickCore/studio.h"
  43 #include "MagickCore/artifact.h"
  44 #include "MagickCore/blob.h"
  45 #include "MagickCore/blob-private.h"
  46 #include "MagickCore/cache.h"
  47 #include "MagickCore/colormap.h"
  48 #include "MagickCore/colorspace.h"
  49 #include "MagickCore/colorspace-private.h"
  50 #include "MagickCore/exception.h"
  51 #include "MagickCore/exception-private.h"
  52 #include "MagickCore/image.h"
  53 #include "MagickCore/image-private.h"
  54 #include "MagickCore/list.h"
  55 #include "MagickCore/log.h"
  56 #include "MagickCore/magick.h"
  57 #include "MagickCore/memory_.h"
  58 #include "MagickCore/monitor.h"
  59 #include "MagickCore/monitor-private.h"
  60 #include "MagickCore/nt-base-private.h"
  61 #include "MagickCore/option.h"
  62 #include "MagickCore/pixel-accessor.h"
  63 #include "MagickCore/quantize.h"
  64 #include "MagickCore/quantum-private.h"
  65 #include "MagickCore/static.h"
  66 #include "MagickCore/string_.h"
  67 #include "MagickCore/module.h"
  68 \f
  69 /*
  70   Define declarations.
  71 */
  72 #if !defined(MAGICKCORE_WINDOWS_SUPPORT) || defined(__MINGW32__) || defined(__MINGW64__)
  73 #define BI_RGB  0
  74 #define BI_RLE8  1
  75 #define BI_BITFIELDS  3
  76 #endif
  77 #define MaxIcons  1024
  78 \f
  79 /*
  80   Typedef declarations.
  81 */
  82 typedef struct _IconEntry
  83 {
  84   unsigned char
  85     width,
  86     height,
  87     colors,
  88     reserved;
  89
  90   unsigned short int
  91     planes,
  92     bits_per_pixel;
  93
  94   size_t
  95     size,
  96     offset;
  97 } IconEntry;
  98
  99 typedef struct _IconFile
 100 {
 101   short
 102     reserved,
 103     resource_type,
 104     count;
 105
 106   IconEntry
 107     directory[MaxIcons];
 108 } IconFile;
 109
 110 typedef struct _IconInfo
 111 {
 112   size_t
 113     file_size,
 114     ba_offset,
 115     offset_bits,
 116     size;
 117
 118   ssize_t
 119     width,
 120     height;
 121
 122   unsigned short
 123     planes,
 124     bits_per_pixel;
 125
 126   size_t
 127     compression,
 128     image_size,
 129     x_pixels,
 130     y_pixels,
 131     number_colors,
 132     red_mask,
 133     green_mask,
 134     blue_mask,
 135     alpha_mask,
 136     colors_important;
 137
 138   ssize_t
 139     colorspace;
 140 } IconInfo;
 141 \f
 142 /*
 143   Forward declaractions.
 144 */
 145 static Image
 146   *AutoResizeImage(const Image *,const char *,MagickOffsetType *,
 147     ExceptionInfo *);
 148
 149 static MagickBooleanType
 150   WriteICONImage(const ImageInfo *,Image *,ExceptionInfo *);
 151
 152 Image *AutoResizeImage(const Image *image,const char *option,
 153   MagickOffsetType *count,ExceptionInfo *exception)
 154 {
 155   #define MAX_SIZES 16
 156
 157   char
 158     *q;
 159
 160   const char
 161     *p;
 162
 163   Image
 164     *resized,
 165     *images;
 166
 167   register ssize_t
 168     i;
 169
 170   size_t
 171     sizes[MAX_SIZES]={256,192,128,96,64,48,40,32,24,16};
 172
 173   images=NULL;
 174   *count=0;
 175   i=0;
 176   p=option;
 177   while (*p != '\0' && i < MAX_SIZES)
 178   {
 179     size_t
 180       size;
 181
 182     while ((isspace((int) ((unsigned char) *p)) != 0))
 183       p++;
 184
 185     size=(size_t)strtol(p,&q,10);
 186     if ((p == q) || (size < 16) || (size > 256))
 187       return((Image *) NULL);
 188
 189     p=q;
 190     sizes[i++]=size;
 191
 192     while ((isspace((int) ((unsigned char) *p)) != 0) || (*p == ','))
 193       p++;
 194   }
 195
 196   if (i==0)
 197     i=10;
 198   *count=i;
 199   for (i=0; i < *count; i++)
 200   {
 201     resized=ResizeImage(image,sizes[i],sizes[i],image->filter,exception);
 202     if (resized == (Image *) NULL)
 203       return(DestroyImageList(images));
 204
 205     if (images == (Image *) NULL)
 206       images=resized;
 207     else
 208       AppendImageToList(&images,resized);
 209   }
 210   return(images);
 211 }
 212 \f
 213 /*
 214 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 215 %                                                                             %
 216 %                                                                             %
 217 %                                                                             %
 218 %   R e a d I C O N I m a g e                                                 %
 219 %                                                                             %
 220 %                                                                             %
 221 %                                                                             %
 222 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 223 %
 224 %  ReadICONImage() reads a Microsoft icon image file and returns it.  It
 225 %  allocates the memory necessary for the new Image structure and returns a
 226 %  pointer to the new image.
 227 %
 228 %  The format of the ReadICONImage method is:
 229 %
 230 %      Image *ReadICONImage(const ImageInfo *image_info,
 231 %        ExceptionInfo *exception)
 232 %
 233 %  A description of each parameter follows:
 234 %
 235 %    o image_info: the image info.
 236 %
 237 %    o exception: return any errors or warnings in this structure.
 238 %
 239 */
 240 static Image *ReadICONImage(const ImageInfo *image_info,
 241   ExceptionInfo *exception)
 242 {
 243   IconFile
 244     icon_file;
 245
 246   IconInfo
 247     icon_info;
 248
 249   Image
 250     *image;
 251
 252   MagickBooleanType
 253     status;
 254
 255   register ssize_t
 256     i,
 257     x;
 258
 259   register Quantum
 260     *q;
 261
 262   register unsigned char
 263     *p;
 264
 265   size_t
 266     bit,
 267     byte,
 268     bytes_per_line,
 269     one,
 270     scanline_pad;
 271
 272   ssize_t
 273     count,
 274     offset,
 275     y;
 276
 277   /*
 278     Open image file.
 279   */
 280   assert(image_info != (const ImageInfo *) NULL);
 281   assert(image_info->signature == MagickCoreSignature);
 282   (void) LogMagickEvent(CoderEvent,GetMagickModule(),"%s",image_info->filename);
 283   assert(exception != (ExceptionInfo *) NULL);
 284   assert(exception->signature == MagickCoreSignature);
 285   image=AcquireImage(image_info,exception);
 286   status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
 287   if (status == MagickFalse)
 288     {
 289       image=DestroyImageList(image);
 290       return((Image *) NULL);
 291     }
 292   icon_file.reserved=(short) ReadBlobLSBShort(image);
 293   icon_file.resource_type=(short) ReadBlobLSBShort(image);
 294   icon_file.count=(short) ReadBlobLSBShort(image);
 295   if ((icon_file.reserved != 0) ||
 296       ((icon_file.resource_type != 1) && (icon_file.resource_type != 2)) ||
 297       (icon_file.count > MaxIcons))
 298     ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 299   for (i=0; i < icon_file.count; i++)
 300   {
 301     icon_file.directory[i].width=(unsigned char) ReadBlobByte(image);
 302     icon_file.directory[i].height=(unsigned char) ReadBlobByte(image);
 303     icon_file.directory[i].colors=(unsigned char) ReadBlobByte(image);
 304     icon_file.directory[i].reserved=(unsigned char) ReadBlobByte(image);
 305     icon_file.directory[i].planes=(unsigned short) ReadBlobLSBShort(image);
 306     icon_file.directory[i].bits_per_pixel=(unsigned short)
 307       ReadBlobLSBShort(image);
 308     icon_file.directory[i].size=ReadBlobLSBLong(image);
 309     icon_file.directory[i].offset=ReadBlobLSBLong(image);
 310     if (EOFBlob(image) != MagickFalse)
 311       {
 312         ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
 313           image->filename);
 314         break;
 315       }
 316   }
 317   one=1;
 318   for (i=0; i < icon_file.count; i++)
 319   {
 320     /*
 321       Verify Icon identifier.
 322     */
 323     offset=(ssize_t) SeekBlob(image,(MagickOffsetType)
 324       icon_file.directory[i].offset,SEEK_SET);
 325     if (offset < 0)
 326       ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 327     icon_info.size=ReadBlobLSBLong(image);
 328     icon_info.width=(unsigned char) ((int) ReadBlobLSBLong(image));
 329     icon_info.height=(unsigned char) ((int) ReadBlobLSBLong(image)/2);
 330     icon_info.planes=ReadBlobLSBShort(image);
 331     icon_info.bits_per_pixel=ReadBlobLSBShort(image);
 332     if (EOFBlob(image) != MagickFalse)
 333       {
 334         ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
 335           image->filename);
 336         break;
 337       }
 338     if (((icon_info.planes == 18505) && (icon_info.bits_per_pixel == 21060)) ||
 339         (icon_info.size == 0x474e5089))
 340       {
 341         Image
 342           *icon_image;
 343
 344         ImageInfo
 345           *read_info;
 346
 347         size_t
 348           length;
 349
 350         unsigned char
 351           *png;
 352
 353         /*
 354           Icon image encoded as a compressed PNG image.
 355         */
 356         length=icon_file.directory[i].size;
 357         if (~length < 16)
 358           ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 359         png=(unsigned char *) AcquireQuantumMemory(length+16,sizeof(*png));
 360         if (png == (unsigned char *) NULL)
 361           ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 362         (void) CopyMagickMemory(png,"\211PNG\r\n\032\n\000\000\000\015",12);
 363         png[12]=(unsigned char) icon_info.planes;
 364         png[13]=(unsigned char) (icon_info.planes >> 8);
 365         png[14]=(unsigned char) icon_info.bits_per_pixel;
 366         png[15]=(unsigned char) (icon_info.bits_per_pixel >> 8);
 367         count=ReadBlob(image,length-16,png+16);
 368         icon_image=(Image *) NULL;
 369         if (count > 0)
 370           {
 371             read_info=CloneImageInfo(image_info);
 372             (void) CopyMagickString(read_info->magick,"PNG",MagickPathExtent);
 373             icon_image=BlobToImage(read_info,png,length+16,exception);
 374             read_info=DestroyImageInfo(read_info);
 375           }
 376         png=(unsigned char *) RelinquishMagickMemory(png);
 377         if (icon_image == (Image *) NULL)
 378           {
 379             if (count != (ssize_t) (length-16))
 380               ThrowReaderException(CorruptImageError,
 381                 "InsufficientImageDataInFile");
 382             image=DestroyImageList(image);
 383             return((Image *) NULL);
 384           }
 385         DestroyBlob(icon_image);
 386         icon_image->blob=ReferenceBlob(image->blob);
 387         ReplaceImageInList(&image,icon_image);
 388       }
 389     else
 390       {
 391         if (icon_info.bits_per_pixel > 32)
 392           ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 393         icon_info.compression=ReadBlobLSBLong(image);
 394         icon_info.image_size=ReadBlobLSBLong(image);
 395         icon_info.x_pixels=ReadBlobLSBLong(image);
 396         icon_info.y_pixels=ReadBlobLSBLong(image);
 397         icon_info.number_colors=ReadBlobLSBLong(image);
 398         icon_info.colors_important=ReadBlobLSBLong(image);
 399         image->alpha_trait=BlendPixelTrait;
 400         image->columns=(size_t) icon_file.directory[i].width;
 401         if ((ssize_t) image->columns > icon_info.width)
 402           image->columns=(size_t) icon_info.width;
 403         if (image->columns == 0)
 404           image->columns=256;
 405         image->rows=(size_t) icon_file.directory[i].height;
 406         if ((ssize_t) image->rows > icon_info.height)
 407           image->rows=(size_t) icon_info.height;
 408         if (image->rows == 0)
 409           image->rows=256;
 410         image->depth=icon_info.bits_per_pixel;
 411         if (image->debug != MagickFalse)
 412           {
 413             (void) LogMagickEvent(CoderEvent,GetMagickModule(),
 414               " scene    = %.20g",(double) i);
 415             (void) LogMagickEvent(CoderEvent,GetMagickModule(),
 416               "   size   = %.20g",(double) icon_info.size);
 417             (void) LogMagickEvent(CoderEvent,GetMagickModule(),
 418               "   width  = %.20g",(double) icon_file.directory[i].width);
 419             (void) LogMagickEvent(CoderEvent,GetMagickModule(),
 420               "   height = %.20g",(double) icon_file.directory[i].height);
 421             (void) LogMagickEvent(CoderEvent,GetMagickModule(),
 422               "   colors = %.20g",(double ) icon_info.number_colors);
 423             (void) LogMagickEvent(CoderEvent,GetMagickModule(),
 424               "   planes = %.20g",(double) icon_info.planes);
 425             (void) LogMagickEvent(CoderEvent,GetMagickModule(),
 426               "   bpp    = %.20g",(double) icon_info.bits_per_pixel);
 427           }
 428       if ((icon_info.number_colors != 0) || (icon_info.bits_per_pixel <= 16U))
 429         {
 430           image->storage_class=PseudoClass;
 431           image->colors=icon_info.number_colors;
 432           if (image->colors == 0)
 433             image->colors=one << icon_info.bits_per_pixel;
 434         }
 435       if (image->storage_class == PseudoClass)
 436         {
 437           register ssize_t
 438             i;
 439
 440           unsigned char
 441             *icon_colormap;
 442
 443           /*
 444             Read Icon raster colormap.
 445           */
 446           if (AcquireImageColormap(image,image->colors,exception) ==
 447               MagickFalse)
 448             ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 449           icon_colormap=(unsigned char *) AcquireQuantumMemory((size_t)
 450             image->colors,4UL*sizeof(*icon_colormap));
 451           if (icon_colormap == (unsigned char *) NULL)
 452             ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 453           count=ReadBlob(image,(size_t) (4*image->colors),icon_colormap);
 454           if (count != (ssize_t) (4*image->colors))
 455             ThrowReaderException(CorruptImageError,
 456               "InsufficientImageDataInFile");
 457           p=icon_colormap;
 458           for (i=0; i < (ssize_t) image->colors; i++)
 459           {
 460             image->colormap[i].blue=(Quantum) ScaleCharToQuantum(*p++);
 461             image->colormap[i].green=(Quantum) ScaleCharToQuantum(*p++);
 462             image->colormap[i].red=(Quantum) ScaleCharToQuantum(*p++);
 463             p++;
 464           }
 465           icon_colormap=(unsigned char *) RelinquishMagickMemory(icon_colormap);
 466         }
 467         /*
 468           Convert Icon raster image to pixel packets.
 469         */
 470         if ((image_info->ping != MagickFalse) &&
 471             (image_info->number_scenes != 0))
 472           if (image->scene >= (image_info->scene+image_info->number_scenes-1))
 473             break;
 474         status=SetImageExtent(image,image->columns,image->rows,exception);
 475         if (status == MagickFalse)
 476           return(DestroyImageList(image));
 477         bytes_per_line=(((image->columns*icon_info.bits_per_pixel)+31) &
 478           ~31) >> 3;
 479         (void) bytes_per_line;
 480         scanline_pad=((((image->columns*icon_info.bits_per_pixel)+31) & ~31)-
 481           (image->columns*icon_info.bits_per_pixel)) >> 3;
 482         switch (icon_info.bits_per_pixel)
 483         {
 484           case 1:
 485           {
 486             /*
 487               Convert bitmap scanline.
 488             */
 489             for (y=(ssize_t) image->rows-1; y >= 0; y--)
 490             {
 491               q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 492               if (q == (Quantum *) NULL)
 493                 break;
 494               for (x=0; x < (ssize_t) (image->columns-7); x+=8)
 495               {
 496                 byte=(size_t) ReadBlobByte(image);
 497                 for (bit=0; bit < 8; bit++)
 498                 {
 499                   SetPixelIndex(image,((byte & (0x80 >> bit)) != 0 ? 0x01 :
 500                     0x00),q);
 501                   q+=GetPixelChannels(image);
 502                 }
 503               }
 504               if ((image->columns % 8) != 0)
 505                 {
 506                   byte=(size_t) ReadBlobByte(image);
 507                   for (bit=0; bit < (image->columns % 8); bit++)
 508                   {
 509                     SetPixelIndex(image,((byte & (0x80 >> bit)) != 0 ? 0x01 :
 510                       0x00),q);
 511                     q+=GetPixelChannels(image);
 512                   }
 513                 }
 514               for (x=0; x < (ssize_t) scanline_pad; x++)
 515                 (void) ReadBlobByte(image);
 516               if (SyncAuthenticPixels(image,exception) == MagickFalse)
 517                 break;
 518               if (image->previous == (Image *) NULL)
 519                 {
 520                   status=SetImageProgress(image,LoadImageTag,image->rows-y-1,
 521                     image->rows);
 522                   if (status == MagickFalse)
 523                     break;
 524                 }
 525             }
 526             break;
 527           }
 528           case 4:
 529           {
 530             /*
 531               Read 4-bit Icon scanline.
 532             */
 533             for (y=(ssize_t) image->rows-1; y >= 0; y--)
 534             {
 535               q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 536               if (q == (Quantum *) NULL)
 537                 break;
 538               for (x=0; x < ((ssize_t) image->columns-1); x+=2)
 539               {
 540                 byte=(size_t) ReadBlobByte(image);
 541                 SetPixelIndex(image,((byte >> 4) & 0xf),q);
 542                 q+=GetPixelChannels(image);
 543                 SetPixelIndex(image,((byte) & 0xf),q);
 544                 q+=GetPixelChannels(image);
 545               }
 546               if ((image->columns % 2) != 0)
 547                 {
 548                   byte=(size_t) ReadBlobByte(image);
 549                   SetPixelIndex(image,((byte >> 4) & 0xf),q);
 550                   q+=GetPixelChannels(image);
 551                 }
 552               for (x=0; x < (ssize_t) scanline_pad; x++)
 553                 (void) ReadBlobByte(image);
 554               if (SyncAuthenticPixels(image,exception) == MagickFalse)
 555                 break;
 556               if (image->previous == (Image *) NULL)
 557                 {
 558                   status=SetImageProgress(image,LoadImageTag,image->rows-y-1,
 559                     image->rows);
 560                   if (status == MagickFalse)
 561                     break;
 562                 }
 563             }
 564             break;
 565           }
 566           case 8:
 567           {
 568             /*
 569               Convert PseudoColor scanline.
 570             */
 571             for (y=(ssize_t) image->rows-1; y >= 0; y--)
 572             {
 573               q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 574               if (q == (Quantum *) NULL)
 575                 break;
 576               for (x=0; x < (ssize_t) image->columns; x++)
 577               {
 578                 byte=(size_t) ReadBlobByte(image);
 579                 SetPixelIndex(image,(Quantum) byte,q);
 580                 q+=GetPixelChannels(image);
 581               }
 582               for (x=0; x < (ssize_t) scanline_pad; x++)
 583                 (void) ReadBlobByte(image);
 584               if (SyncAuthenticPixels(image,exception) == MagickFalse)
 585                 break;
 586               if (image->previous == (Image *) NULL)
 587                 {
 588                   status=SetImageProgress(image,LoadImageTag,image->rows-y-1,
 589                     image->rows);
 590                   if (status == MagickFalse)
 591                     break;
 592                 }
 593             }
 594             break;
 595           }
 596           case 16:
 597           {
 598             /*
 599               Convert PseudoColor scanline.
 600             */
 601             for (y=(ssize_t) image->rows-1; y >= 0; y--)
 602             {
 603               q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 604               if (q == (Quantum *) NULL)
 605                 break;
 606               for (x=0; x < (ssize_t) image->columns; x++)
 607               {
 608                 byte=(size_t) ReadBlobByte(image);
 609                 byte|=(size_t) (ReadBlobByte(image) << 8);
 610                 SetPixelIndex(image,(Quantum) byte,q);
 611                 q+=GetPixelChannels(image);
 612               }
 613               for (x=0; x < (ssize_t) scanline_pad; x++)
 614                 (void) ReadBlobByte(image);
 615               if (SyncAuthenticPixels(image,exception) == MagickFalse)
 616                 break;
 617               if (image->previous == (Image *) NULL)
 618                 {
 619                   status=SetImageProgress(image,LoadImageTag,image->rows-y-1,
 620                     image->rows);
 621                   if (status == MagickFalse)
 622                     break;
 623                 }
 624             }
 625             break;
 626           }
 627           case 24:
 628           case 32:
 629           {
 630             /*
 631               Convert DirectColor scanline.
 632             */
 633             for (y=(ssize_t) image->rows-1; y >= 0; y--)
 634             {
 635               q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 636               if (q == (Quantum *) NULL)
 637                 break;
 638               for (x=0; x < (ssize_t) image->columns; x++)
 639               {
 640                 SetPixelBlue(image,ScaleCharToQuantum((unsigned char)
 641                   ReadBlobByte(image)),q);
 642                 SetPixelGreen(image,ScaleCharToQuantum((unsigned char)
 643                   ReadBlobByte(image)),q);
 644                 SetPixelRed(image,ScaleCharToQuantum((unsigned char)
 645                   ReadBlobByte(image)),q);
 646                 if (icon_info.bits_per_pixel == 32)
 647                   SetPixelAlpha(image,ScaleCharToQuantum((unsigned char)
 648                     ReadBlobByte(image)),q);
 649                 q+=GetPixelChannels(image);
 650               }
 651               if (icon_info.bits_per_pixel == 24)
 652                 for (x=0; x < (ssize_t) scanline_pad; x++)
 653                   (void) ReadBlobByte(image);
 654               if (SyncAuthenticPixels(image,exception) == MagickFalse)
 655                 break;
 656               if (image->previous == (Image *) NULL)
 657                 {
 658                   status=SetImageProgress(image,LoadImageTag,image->rows-y-1,
 659                     image->rows);
 660                   if (status == MagickFalse)
 661                     break;
 662                 }
 663             }
 664             break;
 665           }
 666           default:
 667             ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 668         }
 669         if (image_info->ping == MagickFalse)
 670           (void) SyncImage(image,exception);
 671         if (icon_info.bits_per_pixel != 32)
 672           {
 673             /*
 674               Read the ICON alpha mask.
 675             */
 676             image->storage_class=DirectClass;
 677             for (y=(ssize_t) image->rows-1; y >= 0; y--)
 678             {
 679               q=GetAuthenticPixels(image,0,y,image->columns,1,exception);
 680               if (q == (Quantum *) NULL)
 681                 break;
 682               for (x=0; x < ((ssize_t) image->columns-7); x+=8)
 683               {
 684                 byte=(size_t) ReadBlobByte(image);
 685                 for (bit=0; bit < 8; bit++)
 686                 {
 687                   SetPixelAlpha(image,(((byte & (0x80 >> bit)) != 0) ?
 688                     TransparentAlpha : OpaqueAlpha),q);
 689                   q+=GetPixelChannels(image);
 690                 }
 691               }
 692               if ((image->columns % 8) != 0)
 693                 {
 694                   byte=(size_t) ReadBlobByte(image);
 695                   for (bit=0; bit < (image->columns % 8); bit++)
 696                   {
 697                     SetPixelAlpha(image,(((byte & (0x80 >> bit)) != 0) ?
 698                       TransparentAlpha : OpaqueAlpha),q);
 699                     q+=GetPixelChannels(image);
 700                   }
 701                 }
 702               if ((image->columns % 32) != 0)
 703                 for (x=0; x < (ssize_t) ((32-(image->columns % 32))/8); x++)
 704                   (void) ReadBlobByte(image);
 705               if (SyncAuthenticPixels(image,exception) == MagickFalse)
 706                 break;
 707             }
 708           }
 709         if (EOFBlob(image) != MagickFalse)
 710           {
 711             ThrowFileException(exception,CorruptImageError,
 712               "UnexpectedEndOfFile",image->filename);
 713             break;
 714           }
 715       }
 716     /*
 717       Proceed to next image.
 718     */
 719     if (image_info->number_scenes != 0)
 720       if (image->scene >= (image_info->scene+image_info->number_scenes-1))
 721         break;
 722     if (i < (ssize_t) (icon_file.count-1))
 723       {
 724         /*
 725           Allocate next image structure.
 726         */
 727         AcquireNextImage(image_info,image,exception);
 728         if (GetNextImageInList(image) == (Image *) NULL)
 729           {
 730             image=DestroyImageList(image);
 731             return((Image *) NULL);
 732           }
 733         image=SyncNextImageInList(image);
 734         status=SetImageProgress(image,LoadImagesTag,TellBlob(image),
 735           GetBlobSize(image));
 736         if (status == MagickFalse)
 737           break;
 738       }
 739   }
 740   (void) CloseBlob(image);
 741   return(GetFirstImageInList(image));
 742 }
 743 \f
 744 /*
 745 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 746 %                                                                             %
 747 %                                                                             %
 748 %                                                                             %
 749 %   R e g i s t e r I C O N I m a g e                                         %
 750 %                                                                             %
 751 %                                                                             %
 752 %                                                                             %
 753 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 754 %
 755 %  RegisterICONImage() adds attributes for the Icon image format to
 756 %  the list of supported formats.  The attributes include the image format
 757 %  tag, a method to read and/or write the format, whether the format
 758 %  supports the saving of more than one frame to the same file or blob,
 759 %  whether the format supports native in-memory I/O, and a brief
 760 %  description of the format.
 761 %
 762 %  The format of the RegisterICONImage method is:
 763 %
 764 %      size_t RegisterICONImage(void)
 765 %
 766 */
 767 ModuleExport size_t RegisterICONImage(void)
 768 {
 769   MagickInfo
 770     *entry;
 771
 772   entry=AcquireMagickInfo("ICON","CUR","Microsoft icon");
 773   entry->decoder=(DecodeImageHandler *) ReadICONImage;
 774   entry->encoder=(EncodeImageHandler *) WriteICONImage;
 775   entry->flags^=CoderAdjoinFlag;
 776   entry->flags|=CoderSeekableStreamFlag;
 777   (void) RegisterMagickInfo(entry);
 778   entry=AcquireMagickInfo("ICON","ICO","Microsoft icon");
 779   entry->decoder=(DecodeImageHandler *) ReadICONImage;
 780   entry->encoder=(EncodeImageHandler *) WriteICONImage;
 781   entry->flags|=CoderSeekableStreamFlag;
 782   (void) RegisterMagickInfo(entry);
 783   entry=AcquireMagickInfo("ICON","ICON","Microsoft icon");
 784   entry->decoder=(DecodeImageHandler *) ReadICONImage;
 785   entry->encoder=(EncodeImageHandler *) WriteICONImage;
 786   entry->flags^=CoderAdjoinFlag;
 787   entry->flags|=CoderSeekableStreamFlag;
 788   (void) RegisterMagickInfo(entry);
 789   return(MagickImageCoderSignature);
 790 }
 791 \f
 792 /*
 793 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 794 %                                                                             %
 795 %                                                                             %
 796 %                                                                             %
 797 %   U n r e g i s t e r I C O N I m a g e                                     %
 798 %                                                                             %
 799 %                                                                             %
 800 %                                                                             %
 801 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 802 %
 803 %  UnregisterICONImage() removes format registrations made by the
 804 %  ICON module from the list of supported formats.
 805 %
 806 %  The format of the UnregisterICONImage method is:
 807 %
 808 %      UnregisterICONImage(void)
 809 %
 810 */
 811 ModuleExport void UnregisterICONImage(void)
 812 {
 813   (void) UnregisterMagickInfo("CUR");
 814   (void) UnregisterMagickInfo("ICO");
 815   (void) UnregisterMagickInfo("ICON");
 816 }
 817 \f
 818 /*
 819 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 820 %                                                                             %
 821 %                                                                             %
 822 %                                                                             %
 823 %   W r i t e I C O N I m a g e                                               %
 824 %                                                                             %
 825 %                                                                             %
 826 %                                                                             %
 827 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 828 %
 829 %  WriteICONImage() writes an image in Microsoft Windows bitmap encoded
 830 %  image format, version 3 for Windows or (if the image has a matte channel)
 831 %  version 4.
 832 %
 833 %  It encodes any subimage as a compressed PNG image ("BI_PNG)", only when its
 834 %  dimensions are 256x256 and image->compression is undefined or is defined as
 835 %  ZipCompression.
 836 %
 837 %  The format of the WriteICONImage method is:
 838 %
 839 %      MagickBooleanType WriteICONImage(const ImageInfo *image_info,
 840 %        Image *image,ExceptionInfo *exception)
 841 %
 842 %  A description of each parameter follows.
 843 %
 844 %    o image_info: the image info.
 845 %
 846 %    o image:  The image.
 847 %
 848 %    o exception: return any errors or warnings in this structure.
 849 %
 850 */
 851 static MagickBooleanType WriteICONImage(const ImageInfo *image_info,
 852   Image *image,ExceptionInfo *exception)
 853 {
 854   const char
 855     *option;
 856
 857   IconFile
 858     icon_file;
 859
 860   IconInfo
 861     icon_info;
 862
 863   Image
 864     *images,
 865     *next;
 866
 867   MagickBooleanType
 868     status;
 869
 870   MagickOffsetType
 871     offset,
 872     scene;
 873
 874   register const Quantum
 875     *p;
 876
 877   register ssize_t
 878     i,
 879     x;
 880
 881   register unsigned char
 882     *q;
 883
 884   size_t
 885     bytes_per_line,
 886     scanline_pad;
 887
 888   ssize_t
 889     y;
 890
 891   unsigned char
 892     bit,
 893     byte,
 894     *pixels;
 895
 896   /*
 897     Open output image file.
 898   */
 899   assert(image_info != (const ImageInfo *) NULL);
 900   assert(image_info->signature == MagickCoreSignature);
 901   assert(image != (Image *) NULL);
 902   assert(image->signature == MagickCoreSignature);
 903     (void) LogMagickEvent(CoderEvent,GetMagickModule(),"%s",image->filename);
 904   assert(exception != (ExceptionInfo *) NULL);
 905   assert(exception->signature == MagickCoreSignature);
 906   status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
 907   if (status == MagickFalse)
 908     return(status);
 909   images=(Image *) NULL;
 910   option=GetImageOption(image_info,"icon:auto-resize");
 911   if (option != (const char *) NULL)
 912     {
 913       images=AutoResizeImage(image,option,&scene,exception);
 914       if (images == (Image *) NULL)
 915         ThrowWriterException(ImageError,"InvalidDimensions");
 916     }
 917   else
 918     {
 919       scene=0;
 920       next=image;
 921       do
 922       {
 923         if ((image->columns > 256L) || (image->rows > 256L))
 924           ThrowWriterException(ImageError,"WidthOrHeightExceedsLimit");
 925         scene++;
 926         next=SyncNextImageInList(next);
 927       } while ((next != (Image *) NULL) && (image_info->adjoin != MagickFalse));
 928     }
 929   /*
 930     Dump out a ICON header template to be properly initialized later.
 931   */
 932   (void) WriteBlobLSBShort(image,0);
 933   (void) WriteBlobLSBShort(image,1);
 934   (void) WriteBlobLSBShort(image,(unsigned char) scene);
 935   (void) ResetMagickMemory(&icon_file,0,sizeof(icon_file));
 936   (void) ResetMagickMemory(&icon_info,0,sizeof(icon_info));
 937   scene=0;
 938   next=(images != (Image *) NULL) ? images : image;
 939   do
 940   {
 941     (void) WriteBlobByte(image,icon_file.directory[scene].width);
 942     (void) WriteBlobByte(image,icon_file.directory[scene].height);
 943     (void) WriteBlobByte(image,icon_file.directory[scene].colors);
 944     (void) WriteBlobByte(image,icon_file.directory[scene].reserved);
 945     (void) WriteBlobLSBShort(image,icon_file.directory[scene].planes);
 946     (void) WriteBlobLSBShort(image,icon_file.directory[scene].bits_per_pixel);
 947     (void) WriteBlobLSBLong(image,(unsigned int)
 948       icon_file.directory[scene].size);
 949     (void) WriteBlobLSBLong(image,(unsigned int)
 950       icon_file.directory[scene].offset);
 951     scene++;
 952     next=SyncNextImageInList(next);
 953   } while ((next != (Image *) NULL) && (image_info->adjoin != MagickFalse));
 954   scene=0;
 955   next=(images != (Image *) NULL) ? images : image;
 956   do
 957   {
 958     if ((next->columns > 255L) && (next->rows > 255L) &&
 959         ((next->compression == UndefinedCompression) ||
 960         (next->compression == ZipCompression)))
 961       {
 962         Image
 963           *write_image;
 964
 965         ImageInfo
 966           *write_info;
 967
 968         size_t
 969           length;
 970
 971         unsigned char
 972           *png;
 973
 974         write_image=CloneImage(next,0,0,MagickTrue,exception);
 975         if (write_image == (Image *) NULL)
 976           {
 977             images=DestroyImageList(images);
 978             return(MagickFalse);
 979           }
 980         write_info=CloneImageInfo(image_info);
 981         (void) CopyMagickString(write_info->filename,"PNG:",MagickPathExtent);
 982
 983         /* Don't write any ancillary chunks except for gAMA */
 984         (void) SetImageArtifact(write_image,"png:include-chunk","none,gama");
 985
 986         /* Only write PNG32 formatted PNG (32-bit RGBA), 8 bits per channel */
 987         (void) SetImageArtifact(write_image,"png:format","png32");
 988
 989         png=(unsigned char *) ImageToBlob(write_info,write_image,&length,
 990           exception);
 991         write_image=DestroyImage(write_image);
 992         write_info=DestroyImageInfo(write_info);
 993         if (png == (unsigned char *) NULL)
 994           {
 995             images=DestroyImageList(images);
 996             return(MagickFalse);
 997           }
 998         icon_file.directory[scene].width=0;
 999         icon_file.directory[scene].height=0;
1000         icon_file.directory[scene].colors=0;
1001         icon_file.directory[scene].reserved=0;
1002         icon_file.directory[scene].planes=1;
1003         icon_file.directory[scene].bits_per_pixel=32;
1004         icon_file.directory[scene].size=(size_t) length;
1005         icon_file.directory[scene].offset=(size_t) TellBlob(image);
1006         (void) WriteBlob(image,(size_t) length,png);
1007         png=(unsigned char *) RelinquishMagickMemory(png);
1008       }
1009     else
1010       {
1011         /*
1012           Initialize ICON raster file header.
1013         */
1014         (void) TransformImageColorspace(next,sRGBColorspace,exception);
1015         icon_info.file_size=14+12+28;
1016         icon_info.offset_bits=icon_info.file_size;
1017         icon_info.compression=BI_RGB;
1018         if ((next->storage_class != DirectClass) && (next->colors > 256))
1019           (void) SetImageStorageClass(next,DirectClass,exception);
1020         if (next->storage_class == DirectClass)
1021           {
1022             /*
1023               Full color ICON raster.
1024             */
1025             icon_info.number_colors=0;
1026             icon_info.bits_per_pixel=32;
1027             icon_info.compression=(size_t) BI_RGB;
1028           }
1029         else
1030           {
1031             size_t
1032               one;
1033
1034             /*
1035               Colormapped ICON raster.
1036             */
1037             icon_info.bits_per_pixel=8;
1038             if (next->colors <= 256)
1039               icon_info.bits_per_pixel=8;
1040             if (next->colors <= 16)
1041               icon_info.bits_per_pixel=4;
1042             if (next->colors <= 2)
1043               icon_info.bits_per_pixel=1;
1044             one=1;
1045             icon_info.number_colors=one << icon_info.bits_per_pixel;
1046             if (icon_info.number_colors < next->colors)
1047               {
1048                 (void) SetImageStorageClass(next,DirectClass,exception);
1049                 icon_info.number_colors=0;
1050                 icon_info.bits_per_pixel=(unsigned short) 24;
1051                 icon_info.compression=(size_t) BI_RGB;
1052               }
1053             else
1054               {
1055                 size_t
1056                   one;
1057
1058                 one=1;
1059                 icon_info.file_size+=3*(one << icon_info.bits_per_pixel);
1060                 icon_info.offset_bits+=3*(one << icon_info.bits_per_pixel);
1061                 icon_info.file_size+=(one << icon_info.bits_per_pixel);
1062                 icon_info.offset_bits+=(one << icon_info.bits_per_pixel);
1063               }
1064           }
1065         bytes_per_line=(((next->columns*icon_info.bits_per_pixel)+31) &
1066           ~31) >> 3;
1067         icon_info.ba_offset=0;
1068         icon_info.width=(ssize_t) next->columns;
1069         icon_info.height=(ssize_t) next->rows;
1070         icon_info.planes=1;
1071         icon_info.image_size=bytes_per_line*next->rows;
1072         icon_info.size=40;
1073         icon_info.size+=(4*icon_info.number_colors);
1074         icon_info.size+=icon_info.image_size;
1075         icon_info.size+=(((icon_info.width+31) & ~31) >> 3)*icon_info.height;
1076         icon_info.file_size+=icon_info.image_size;
1077         icon_info.x_pixels=0;
1078         icon_info.y_pixels=0;
1079         switch (next->units)
1080         {
1081           case UndefinedResolution:
1082           case PixelsPerInchResolution:
1083           {
1084             icon_info.x_pixels=(size_t) (100.0*next->resolution.x/2.54);
1085             icon_info.y_pixels=(size_t) (100.0*next->resolution.y/2.54);
1086             break;
1087           }
1088           case PixelsPerCentimeterResolution:
1089           {
1090             icon_info.x_pixels=(size_t) (100.0*next->resolution.x);
1091             icon_info.y_pixels=(size_t) (100.0*next->resolution.y);
1092             break;
1093           }
1094         }
1095         icon_info.colors_important=icon_info.number_colors;
1096         /*
1097           Convert MIFF to ICON raster pixels.
1098         */
1099         pixels=(unsigned char *) AcquireQuantumMemory((size_t)
1100           icon_info.image_size,sizeof(*pixels));
1101         if (pixels == (unsigned char *) NULL)
1102           {
1103             images=DestroyImageList(images);
1104             ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
1105           }
1106         (void) ResetMagickMemory(pixels,0,(size_t) icon_info.image_size);
1107         switch (icon_info.bits_per_pixel)
1108         {
1109           case 1:
1110           {
1111             size_t
1112               bit,
1113               byte;
1114
1115             /*
1116               Convert PseudoClass image to a ICON monochrome image.
1117             */
1118             for (y=0; y < (ssize_t) next->rows; y++)
1119             {
1120               p=GetVirtualPixels(next,0,y,next->columns,1,exception);
1121               if (p == (const Quantum *) NULL)
1122                 break;
1123               q=pixels+(next->rows-y-1)*bytes_per_line;
1124               bit=0;
1125               byte=0;
1126               for (x=0; x < (ssize_t) next->columns; x++)
1127               {
1128                 byte<<=1;
1129                 byte|=GetPixelIndex(next,p) != 0 ? 0x01 : 0x00;
1130                 bit++;
1131                 if (bit == 8)
1132                   {
1133                     *q++=(unsigned char) byte;
1134                     bit=0;
1135                     byte=0;
1136                   }
1137                 p+=GetPixelChannels(image);
1138               }
1139               if (bit != 0)
1140                 *q++=(unsigned char) (byte << (8-bit));
1141               if (next->previous == (Image *) NULL)
1142                 {
1143                   status=SetImageProgress(next,SaveImageTag,y,next->rows);
1144                   if (status == MagickFalse)
1145                     break;
1146                 }
1147             }
1148             break;
1149           }
1150           case 4:
1151           {
1152             size_t
1153               nibble,
1154               byte;
1155
1156             /*
1157               Convert PseudoClass image to a ICON monochrome image.
1158             */
1159             for (y=0; y < (ssize_t) next->rows; y++)
1160             {
1161               p=GetVirtualPixels(next,0,y,next->columns,1,exception);
1162               if (p == (const Quantum *) NULL)
1163                 break;
1164               q=pixels+(next->rows-y-1)*bytes_per_line;
1165               nibble=0;
1166               byte=0;
1167               for (x=0; x < (ssize_t) next->columns; x++)
1168               {
1169                 byte<<=4;
1170                 byte|=((size_t) GetPixelIndex(next,p) & 0x0f);
1171                 nibble++;
1172                 if (nibble == 2)
1173                   {
1174                     *q++=(unsigned char) byte;
1175                     nibble=0;
1176                     byte=0;
1177                   }
1178                 p+=GetPixelChannels(image);
1179               }
1180               if (nibble != 0)
1181                 *q++=(unsigned char) (byte << 4);
1182               if (next->previous == (Image *) NULL)
1183                 {
1184                   status=SetImageProgress(next,SaveImageTag,y,next->rows);
1185                   if (status == MagickFalse)
1186                     break;
1187                 }
1188             }
1189             break;
1190           }
1191           case 8:
1192           {
1193             /*
1194               Convert PseudoClass packet to ICON pixel.
1195             */
1196             for (y=0; y < (ssize_t) next->rows; y++)
1197             {
1198               p=GetVirtualPixels(next,0,y,next->columns,1,exception);
1199               if (p == (const Quantum *) NULL)
1200                 break;
1201               q=pixels+(next->rows-y-1)*bytes_per_line;
1202               for (x=0; x < (ssize_t) next->columns; x++)
1203               {
1204                 *q++=(unsigned char) GetPixelIndex(next,p);
1205                 p+=GetPixelChannels(image);
1206               }
1207               if (next->previous == (Image *) NULL)
1208                 {
1209                   status=SetImageProgress(next,SaveImageTag,y,next->rows);
1210                   if (status == MagickFalse)
1211                     break;
1212                 }
1213             }
1214             break;
1215           }
1216           case 24:
1217           case 32:
1218           {
1219             /*
1220               Convert DirectClass packet to ICON BGR888 or BGRA8888 pixel.
1221             */
1222             for (y=0; y < (ssize_t) next->rows; y++)
1223             {
1224               p=GetVirtualPixels(next,0,y,next->columns,1,exception);
1225               if (p == (const Quantum *) NULL)
1226                 break;
1227               q=pixels+(next->rows-y-1)*bytes_per_line;
1228               for (x=0; x < (ssize_t) next->columns; x++)
1229               {
1230                 *q++=ScaleQuantumToChar(GetPixelBlue(next,p));
1231                 *q++=ScaleQuantumToChar(GetPixelGreen(next,p));
1232                 *q++=ScaleQuantumToChar(GetPixelRed(next,p));
1233                 if (next->alpha_trait == UndefinedPixelTrait)
1234                   *q++=ScaleQuantumToChar(QuantumRange);
1235                 else
1236                   *q++=ScaleQuantumToChar(GetPixelAlpha(next,p));
1237                 p+=GetPixelChannels(next);
1238               }
1239               if (icon_info.bits_per_pixel == 24)
1240                 for (x=3L*(ssize_t) next->columns; x < (ssize_t) bytes_per_line; x++)
1241                   *q++=0x00;
1242               if (next->previous == (Image *) NULL)
1243                 {
1244                   status=SetImageProgress(next,SaveImageTag,y,next->rows);
1245                   if (status == MagickFalse)
1246                     break;
1247                 }
1248             }
1249             break;
1250           }
1251         }
1252         /*
1253           Write 40-byte version 3+ bitmap header.
1254         */
1255         icon_file.directory[scene].width=(unsigned char) icon_info.width;
1256         icon_file.directory[scene].height=(unsigned char) icon_info.height;
1257         icon_file.directory[scene].colors=(unsigned char)
1258           icon_info.number_colors;
1259         icon_file.directory[scene].reserved=0;
1260         icon_file.directory[scene].planes=icon_info.planes;
1261         icon_file.directory[scene].bits_per_pixel=icon_info.bits_per_pixel;
1262         icon_file.directory[scene].size=icon_info.size;
1263         icon_file.directory[scene].offset=(size_t) TellBlob(image);
1264         (void) WriteBlobLSBLong(image,(unsigned int) 40);
1265         (void) WriteBlobLSBLong(image,(unsigned int) icon_info.width);
1266         (void) WriteBlobLSBLong(image,(unsigned int) icon_info.height*2);
1267         (void) WriteBlobLSBShort(image,icon_info.planes);
1268         (void) WriteBlobLSBShort(image,icon_info.bits_per_pixel);
1269         (void) WriteBlobLSBLong(image,(unsigned int) icon_info.compression);
1270         (void) WriteBlobLSBLong(image,(unsigned int) icon_info.image_size);
1271         (void) WriteBlobLSBLong(image,(unsigned int) icon_info.x_pixels);
1272         (void) WriteBlobLSBLong(image,(unsigned int) icon_info.y_pixels);
1273         (void) WriteBlobLSBLong(image,(unsigned int) icon_info.number_colors);
1274         (void) WriteBlobLSBLong(image,(unsigned int) icon_info.colors_important);
1275         if (next->storage_class == PseudoClass)
1276           {
1277             unsigned char
1278               *icon_colormap;
1279
1280             /*
1281               Dump colormap to file.
1282             */
1283             icon_colormap=(unsigned char *) AcquireQuantumMemory((size_t)
1284               (1UL << icon_info.bits_per_pixel),4UL*sizeof(*icon_colormap));
1285             if (icon_colormap == (unsigned char *) NULL)
1286               {
1287                 images=DestroyImageList(images);
1288                 ThrowWriterException(ResourceLimitError,
1289                   "MemoryAllocationFailed");
1290               }
1291             q=icon_colormap;
1292             for (i=0; i < (ssize_t) next->colors; i++)
1293             {
1294               *q++=ScaleQuantumToChar(next->colormap[i].blue);
1295               *q++=ScaleQuantumToChar(next->colormap[i].green);
1296               *q++=ScaleQuantumToChar(next->colormap[i].red);
1297               *q++=(unsigned char) 0x0;
1298             }
1299             for ( ; i < (ssize_t) (1UL << icon_info.bits_per_pixel); i++)
1300             {
1301               *q++=(unsigned char) 0x00;
1302               *q++=(unsigned char) 0x00;
1303               *q++=(unsigned char) 0x00;
1304               *q++=(unsigned char) 0x00;
1305             }
1306             (void) WriteBlob(image,(size_t) (4UL*(1UL <<
1307               icon_info.bits_per_pixel)),icon_colormap);
1308             icon_colormap=(unsigned char *) RelinquishMagickMemory(
1309               icon_colormap);
1310           }
1311         (void) WriteBlob(image,(size_t) icon_info.image_size,pixels);
1312         pixels=(unsigned char *) RelinquishMagickMemory(pixels);
1313         /*
1314           Write matte mask.
1315         */
1316         scanline_pad=(((next->columns+31) & ~31)-next->columns) >> 3;
1317         for (y=((ssize_t) next->rows - 1); y >= 0; y--)
1318         {
1319           p=GetVirtualPixels(next,0,y,next->columns,1,exception);
1320           if (p == (const Quantum *) NULL)
1321             break;
1322           bit=0;
1323           byte=0;
1324           for (x=0; x < (ssize_t) next->columns; x++)
1325           {
1326             byte<<=1;
1327             if ((next->alpha_trait != UndefinedPixelTrait) &&
1328                 (GetPixelAlpha(next,p) == (Quantum) TransparentAlpha))
1329               byte|=0x01;
1330             bit++;
1331             if (bit == 8)
1332               {
1333                 (void) WriteBlobByte(image,(unsigned char) byte);
1334                 bit=0;
1335                 byte=0;
1336               }
1337             p+=GetPixelChannels(next);
1338           }
1339           if (bit != 0)
1340             (void) WriteBlobByte(image,(unsigned char) (byte << (8-bit)));
1341           for (i=0; i < (ssize_t) scanline_pad; i++)
1342             (void) WriteBlobByte(image,(unsigned char) 0);
1343         }
1344       }
1345     if (GetNextImageInList(next) == (Image *) NULL)
1346       break;
1347     status=SetImageProgress(next,SaveImagesTag,scene++,
1348       GetImageListLength(next));
1349     if (status == MagickFalse)
1350       break;
1351     next=SyncNextImageInList(next);
1352   } while ((next != (Image *) NULL) && (image_info->adjoin != MagickFalse));
1353   offset=SeekBlob(image,0,SEEK_SET);
1354   (void) offset;
1355   (void) WriteBlobLSBShort(image,0);
1356   (void) WriteBlobLSBShort(image,1);
1357   (void) WriteBlobLSBShort(image,(unsigned short) (scene+1));
1358   scene=0;
1359   next=(images != (Image *) NULL) ? images : image;
1360   do
1361   {
1362     (void) WriteBlobByte(image,icon_file.directory[scene].width);
1363     (void) WriteBlobByte(image,icon_file.directory[scene].height);
1364     (void) WriteBlobByte(image,icon_file.directory[scene].colors);
1365     (void) WriteBlobByte(image,icon_file.directory[scene].reserved);
1366     (void) WriteBlobLSBShort(image,icon_file.directory[scene].planes);
1367     (void) WriteBlobLSBShort(image,icon_file.directory[scene].bits_per_pixel);
1368     (void) WriteBlobLSBLong(image,(unsigned int)
1369       icon_file.directory[scene].size);
1370     (void) WriteBlobLSBLong(image,(unsigned int)
1371       icon_file.directory[scene].offset);
1372     scene++;
1373     next=SyncNextImageInList(next);
1374   } while ((next != (Image *) NULL) && (image_info->adjoin != MagickFalse));
1375   (void) CloseBlob(image);
1376   images=DestroyImageList(images);
1377   return(MagickTrue);
1378 }