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 1999-2017 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       break;
 312   }
 313   if (EOFBlob(image) != MagickFalse)
 314     ThrowReaderException(CorruptImageError,"UnexpectedEndOfFile");
 315   one=1;
 316   for (i=0; i < icon_file.count; i++)
 317   {
 318     /*
 319       Verify Icon identifier.
 320     */
 321     offset=(ssize_t) SeekBlob(image,(MagickOffsetType)
 322       icon_file.directory[i].offset,SEEK_SET);
 323     if (offset < 0)
 324       ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 325     icon_info.size=ReadBlobLSBLong(image);
 326     icon_info.width=(unsigned char) ReadBlobLSBSignedLong(image);
 327     icon_info.height=(unsigned char) (ReadBlobLSBSignedLong(image)/2);
 328     icon_info.planes=ReadBlobLSBShort(image);
 329     icon_info.bits_per_pixel=ReadBlobLSBShort(image);
 330     if (EOFBlob(image) != MagickFalse)
 331       {
 332         ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
 333           image->filename);
 334         break;
 335       }
 336     if (((icon_info.planes == 18505) && (icon_info.bits_per_pixel == 21060)) ||
 337         (icon_info.size == 0x474e5089))
 338       {
 339         Image
 340           *icon_image;
 341
 342         ImageInfo
 343           *read_info;
 344
 345         size_t
 346           length;
 347
 348         unsigned char
 349           *png;
 350
 351         /*
 352           Icon image encoded as a compressed PNG image.
 353         */
 354         length=icon_file.directory[i].size;
 355         if ((length < 16) || (~length < 16))
 356           ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 357         png=(unsigned char *) AcquireQuantumMemory(length+16,sizeof(*png));
 358         if (png == (unsigned char *) NULL)
 359           ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 360         (void) CopyMagickMemory(png,"\211PNG\r\n\032\n\000\000\000\015",12);
 361         png[12]=(unsigned char) icon_info.planes;
 362         png[13]=(unsigned char) (icon_info.planes >> 8);
 363         png[14]=(unsigned char) icon_info.bits_per_pixel;
 364         png[15]=(unsigned char) (icon_info.bits_per_pixel >> 8);
 365         count=ReadBlob(image,length-16,png+16);
 366         icon_image=(Image *) NULL;
 367         if (count > 0)
 368           {
 369             read_info=CloneImageInfo(image_info);
 370             (void) CopyMagickString(read_info->magick,"PNG",MagickPathExtent);
 371             icon_image=BlobToImage(read_info,png,length+16,exception);
 372             read_info=DestroyImageInfo(read_info);
 373           }
 374         png=(unsigned char *) RelinquishMagickMemory(png);
 375         if (icon_image == (Image *) NULL)
 376           {
 377             if (count != (ssize_t) (length-16))
 378               ThrowReaderException(CorruptImageError,
 379                 "InsufficientImageDataInFile");
 380             image=DestroyImageList(image);
 381             return((Image *) NULL);
 382           }
 383         DestroyBlob(icon_image);
 384         icon_image->blob=ReferenceBlob(image->blob);
 385         ReplaceImageInList(&image,icon_image);
 386       }
 387     else
 388       {
 389         if (icon_info.bits_per_pixel > 32)
 390           ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 391         icon_info.compression=ReadBlobLSBLong(image);
 392         icon_info.image_size=ReadBlobLSBLong(image);
 393         icon_info.x_pixels=ReadBlobLSBLong(image);
 394         icon_info.y_pixels=ReadBlobLSBLong(image);
 395         icon_info.number_colors=ReadBlobLSBLong(image);
 396         icon_info.colors_important=ReadBlobLSBLong(image);
 397         image->alpha_trait=BlendPixelTrait;
 398         image->columns=(size_t) icon_file.directory[i].width;
 399         if ((ssize_t) image->columns > icon_info.width)
 400           image->columns=(size_t) icon_info.width;
 401         if (image->columns == 0)
 402           image->columns=256;
 403         image->rows=(size_t) icon_file.directory[i].height;
 404         if ((ssize_t) image->rows > icon_info.height)
 405           image->rows=(size_t) icon_info.height;
 406         if (image->rows == 0)
 407           image->rows=256;
 408         image->depth=icon_info.bits_per_pixel;
 409         if (image->debug != MagickFalse)
 410           {
 411             (void) LogMagickEvent(CoderEvent,GetMagickModule(),
 412               " scene    = %.20g",(double) i);
 413             (void) LogMagickEvent(CoderEvent,GetMagickModule(),
 414               "   size   = %.20g",(double) icon_info.size);
 415             (void) LogMagickEvent(CoderEvent,GetMagickModule(),
 416               "   width  = %.20g",(double) icon_file.directory[i].width);
 417             (void) LogMagickEvent(CoderEvent,GetMagickModule(),
 418               "   height = %.20g",(double) icon_file.directory[i].height);
 419             (void) LogMagickEvent(CoderEvent,GetMagickModule(),
 420               "   colors = %.20g",(double ) icon_info.number_colors);
 421             (void) LogMagickEvent(CoderEvent,GetMagickModule(),
 422               "   planes = %.20g",(double) icon_info.planes);
 423             (void) LogMagickEvent(CoderEvent,GetMagickModule(),
 424               "   bpp    = %.20g",(double) icon_info.bits_per_pixel);
 425           }
 426       if ((icon_info.number_colors != 0) || (icon_info.bits_per_pixel <= 16U))
 427         {
 428           image->storage_class=PseudoClass;
 429           image->colors=icon_info.number_colors;
 430           if (image->colors == 0)
 431             image->colors=one << icon_info.bits_per_pixel;
 432         }
 433       if (image->storage_class == PseudoClass)
 434         {
 435           register ssize_t
 436             i;
 437
 438           unsigned char
 439             *icon_colormap;
 440
 441           /*
 442             Read Icon raster colormap.
 443           */
 444           if (AcquireImageColormap(image,image->colors,exception) ==
 445               MagickFalse)
 446             ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 447           icon_colormap=(unsigned char *) AcquireQuantumMemory((size_t)
 448             image->colors,4UL*sizeof(*icon_colormap));
 449           if (icon_colormap == (unsigned char *) NULL)
 450             ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 451           count=ReadBlob(image,(size_t) (4*image->colors),icon_colormap);
 452           if (count != (ssize_t) (4*image->colors))
 453             ThrowReaderException(CorruptImageError,
 454               "InsufficientImageDataInFile");
 455           p=icon_colormap;
 456           for (i=0; i < (ssize_t) image->colors; i++)
 457           {
 458             image->colormap[i].blue=(Quantum) ScaleCharToQuantum(*p++);
 459             image->colormap[i].green=(Quantum) ScaleCharToQuantum(*p++);
 460             image->colormap[i].red=(Quantum) ScaleCharToQuantum(*p++);
 461             p++;
 462           }
 463           icon_colormap=(unsigned char *) RelinquishMagickMemory(icon_colormap);
 464         }
 465         /*
 466           Convert Icon raster image to pixel packets.
 467         */
 468         if ((image_info->ping != MagickFalse) &&
 469             (image_info->number_scenes != 0))
 470           if (image->scene >= (image_info->scene+image_info->number_scenes-1))
 471             break;
 472         status=SetImageExtent(image,image->columns,image->rows,exception);
 473         if (status == MagickFalse)
 474           return(DestroyImageList(image));
 475         bytes_per_line=(((image->columns*icon_info.bits_per_pixel)+31) &
 476           ~31) >> 3;
 477         (void) bytes_per_line;
 478         scanline_pad=((((image->columns*icon_info.bits_per_pixel)+31) & ~31)-
 479           (image->columns*icon_info.bits_per_pixel)) >> 3;
 480         switch (icon_info.bits_per_pixel)
 481         {
 482           case 1:
 483           {
 484             /*
 485               Convert bitmap scanline.
 486             */
 487             for (y=(ssize_t) image->rows-1; y >= 0; y--)
 488             {
 489               q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 490               if (q == (Quantum *) NULL)
 491                 break;
 492               for (x=0; x < (ssize_t) (image->columns-7); x+=8)
 493               {
 494                 byte=(size_t) ReadBlobByte(image);
 495                 for (bit=0; bit < 8; bit++)
 496                 {
 497                   SetPixelIndex(image,((byte & (0x80 >> bit)) != 0 ? 0x01 :
 498                     0x00),q);
 499                   q+=GetPixelChannels(image);
 500                 }
 501               }
 502               if ((image->columns % 8) != 0)
 503                 {
 504                   byte=(size_t) ReadBlobByte(image);
 505                   for (bit=0; bit < (image->columns % 8); bit++)
 506                   {
 507                     SetPixelIndex(image,((byte & (0x80 >> bit)) != 0 ? 0x01 :
 508                       0x00),q);
 509                     q+=GetPixelChannels(image);
 510                   }
 511                 }
 512               for (x=0; x < (ssize_t) scanline_pad; x++)
 513                 (void) ReadBlobByte(image);
 514               if (SyncAuthenticPixels(image,exception) == MagickFalse)
 515                 break;
 516               if (image->previous == (Image *) NULL)
 517                 {
 518                   status=SetImageProgress(image,LoadImageTag,image->rows-y-1,
 519                     image->rows);
 520                   if (status == MagickFalse)
 521                     break;
 522                 }
 523             }
 524             break;
 525           }
 526           case 4:
 527           {
 528             /*
 529               Read 4-bit Icon scanline.
 530             */
 531             for (y=(ssize_t) image->rows-1; y >= 0; y--)
 532             {
 533               q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 534               if (q == (Quantum *) NULL)
 535                 break;
 536               for (x=0; x < ((ssize_t) image->columns-1); x+=2)
 537               {
 538                 byte=(size_t) ReadBlobByte(image);
 539                 SetPixelIndex(image,((byte >> 4) & 0xf),q);
 540                 q+=GetPixelChannels(image);
 541                 SetPixelIndex(image,((byte) & 0xf),q);
 542                 q+=GetPixelChannels(image);
 543               }
 544               if ((image->columns % 2) != 0)
 545                 {
 546                   byte=(size_t) ReadBlobByte(image);
 547                   SetPixelIndex(image,((byte >> 4) & 0xf),q);
 548                   q+=GetPixelChannels(image);
 549                 }
 550               for (x=0; x < (ssize_t) scanline_pad; x++)
 551                 (void) ReadBlobByte(image);
 552               if (SyncAuthenticPixels(image,exception) == MagickFalse)
 553                 break;
 554               if (image->previous == (Image *) NULL)
 555                 {
 556                   status=SetImageProgress(image,LoadImageTag,image->rows-y-1,
 557                     image->rows);
 558                   if (status == MagickFalse)
 559                     break;
 560                 }
 561             }
 562             break;
 563           }
 564           case 8:
 565           {
 566             /*
 567               Convert PseudoColor scanline.
 568             */
 569             for (y=(ssize_t) image->rows-1; y >= 0; y--)
 570             {
 571               q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 572               if (q == (Quantum *) NULL)
 573                 break;
 574               for (x=0; x < (ssize_t) image->columns; x++)
 575               {
 576                 byte=(size_t) ReadBlobByte(image);
 577                 SetPixelIndex(image,(Quantum) byte,q);
 578                 q+=GetPixelChannels(image);
 579               }
 580               for (x=0; x < (ssize_t) scanline_pad; x++)
 581                 (void) ReadBlobByte(image);
 582               if (SyncAuthenticPixels(image,exception) == MagickFalse)
 583                 break;
 584               if (image->previous == (Image *) NULL)
 585                 {
 586                   status=SetImageProgress(image,LoadImageTag,image->rows-y-1,
 587                     image->rows);
 588                   if (status == MagickFalse)
 589                     break;
 590                 }
 591             }
 592             break;
 593           }
 594           case 16:
 595           {
 596             /*
 597               Convert PseudoColor scanline.
 598             */
 599             for (y=(ssize_t) image->rows-1; y >= 0; y--)
 600             {
 601               q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 602               if (q == (Quantum *) NULL)
 603                 break;
 604               for (x=0; x < (ssize_t) image->columns; x++)
 605               {
 606                 byte=(size_t) ReadBlobByte(image);
 607                 byte|=(size_t) (ReadBlobByte(image) << 8);
 608                 SetPixelIndex(image,(Quantum) byte,q);
 609                 q+=GetPixelChannels(image);
 610               }
 611               for (x=0; x < (ssize_t) scanline_pad; x++)
 612                 (void) ReadBlobByte(image);
 613               if (SyncAuthenticPixels(image,exception) == MagickFalse)
 614                 break;
 615               if (image->previous == (Image *) NULL)
 616                 {
 617                   status=SetImageProgress(image,LoadImageTag,image->rows-y-1,
 618                     image->rows);
 619                   if (status == MagickFalse)
 620                     break;
 621                 }
 622             }
 623             break;
 624           }
 625           case 24:
 626           case 32:
 627           {
 628             /*
 629               Convert DirectColor scanline.
 630             */
 631             for (y=(ssize_t) image->rows-1; y >= 0; y--)
 632             {
 633               q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 634               if (q == (Quantum *) NULL)
 635                 break;
 636               for (x=0; x < (ssize_t) image->columns; x++)
 637               {
 638                 SetPixelBlue(image,ScaleCharToQuantum((unsigned char)
 639                   ReadBlobByte(image)),q);
 640                 SetPixelGreen(image,ScaleCharToQuantum((unsigned char)
 641                   ReadBlobByte(image)),q);
 642                 SetPixelRed(image,ScaleCharToQuantum((unsigned char)
 643                   ReadBlobByte(image)),q);
 644                 if (icon_info.bits_per_pixel == 32)
 645                   SetPixelAlpha(image,ScaleCharToQuantum((unsigned char)
 646                     ReadBlobByte(image)),q);
 647                 q+=GetPixelChannels(image);
 648               }
 649               if (icon_info.bits_per_pixel == 24)
 650                 for (x=0; x < (ssize_t) scanline_pad; x++)
 651                   (void) ReadBlobByte(image);
 652               if (SyncAuthenticPixels(image,exception) == MagickFalse)
 653                 break;
 654               if (image->previous == (Image *) NULL)
 655                 {
 656                   status=SetImageProgress(image,LoadImageTag,image->rows-y-1,
 657                     image->rows);
 658                   if (status == MagickFalse)
 659                     break;
 660                 }
 661             }
 662             break;
 663           }
 664           default:
 665             ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 666         }
 667         if ((image_info->ping == MagickFalse) &&
 668             (icon_info.bits_per_pixel <= 16))
 669           (void) SyncImage(image,exception);
 670         if (icon_info.bits_per_pixel != 32)
 671           {
 672             /*
 673               Read the ICON alpha mask.
 674             */
 675             image->storage_class=DirectClass;
 676             for (y=(ssize_t) image->rows-1; y >= 0; y--)
 677             {
 678               q=GetAuthenticPixels(image,0,y,image->columns,1,exception);
 679               if (q == (Quantum *) NULL)
 680                 break;
 681               for (x=0; x < ((ssize_t) image->columns-7); x+=8)
 682               {
 683                 byte=(size_t) ReadBlobByte(image);
 684                 for (bit=0; bit < 8; bit++)
 685                 {
 686                   SetPixelAlpha(image,(((byte & (0x80 >> bit)) != 0) ?
 687                     TransparentAlpha : OpaqueAlpha),q);
 688                   q+=GetPixelChannels(image);
 689                 }
 690               }
 691               if ((image->columns % 8) != 0)
 692                 {
 693                   byte=(size_t) ReadBlobByte(image);
 694                   for (bit=0; bit < (image->columns % 8); bit++)
 695                   {
 696                     SetPixelAlpha(image,(((byte & (0x80 >> bit)) != 0) ?
 697                       TransparentAlpha : OpaqueAlpha),q);
 698                     q+=GetPixelChannels(image);
 699                   }
 700                 }
 701               if ((image->columns % 32) != 0)
 702                 for (x=0; x < (ssize_t) ((32-(image->columns % 32))/8); x++)
 703                   (void) ReadBlobByte(image);
 704               if (SyncAuthenticPixels(image,exception) == MagickFalse)
 705                 break;
 706             }
 707           }
 708         if (EOFBlob(image) != MagickFalse)
 709           {
 710             ThrowFileException(exception,CorruptImageError,
 711               "UnexpectedEndOfFile",image->filename);
 712             break;
 713           }
 714       }
 715     /*
 716       Proceed to next image.
 717     */
 718     if (image_info->number_scenes != 0)
 719       if (image->scene >= (image_info->scene+image_info->number_scenes-1))
 720         break;
 721     if (i < (ssize_t) (icon_file.count-1))
 722       {
 723         /*
 724           Allocate next image structure.
 725         */
 726         AcquireNextImage(image_info,image,exception);
 727         if (GetNextImageInList(image) == (Image *) NULL)
 728           {
 729             image=DestroyImageList(image);
 730             return((Image *) NULL);
 731           }
 732         image=SyncNextImageInList(image);
 733         status=SetImageProgress(image,LoadImagesTag,TellBlob(image),
 734           GetBlobSize(image));
 735         if (status == MagickFalse)
 736           break;
 737       }
 738   }
 739   (void) CloseBlob(image);
 740   return(GetFirstImageInList(image));
 741 }
 742 \f
 743 /*
 744 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 745 %                                                                             %
 746 %                                                                             %
 747 %                                                                             %
 748 %   R e g i s t e r I C O N I m a g e                                         %
 749 %                                                                             %
 750 %                                                                             %
 751 %                                                                             %
 752 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 753 %
 754 %  RegisterICONImage() adds attributes for the Icon image format to
 755 %  the list of supported formats.  The attributes include the image format
 756 %  tag, a method to read and/or write the format, whether the format
 757 %  supports the saving of more than one frame to the same file or blob,
 758 %  whether the format supports native in-memory I/O, and a brief
 759 %  description of the format.
 760 %
 761 %  The format of the RegisterICONImage method is:
 762 %
 763 %      size_t RegisterICONImage(void)
 764 %
 765 */
 766 ModuleExport size_t RegisterICONImage(void)
 767 {
 768   MagickInfo
 769     *entry;
 770
 771   entry=AcquireMagickInfo("ICON","CUR","Microsoft icon");
 772   entry->decoder=(DecodeImageHandler *) ReadICONImage;
 773   entry->encoder=(EncodeImageHandler *) WriteICONImage;
 774   entry->flags^=CoderAdjoinFlag;
 775   entry->flags|=CoderSeekableStreamFlag;
 776   (void) RegisterMagickInfo(entry);
 777   entry=AcquireMagickInfo("ICON","ICO","Microsoft icon");
 778   entry->decoder=(DecodeImageHandler *) ReadICONImage;
 779   entry->encoder=(EncodeImageHandler *) WriteICONImage;
 780   entry->flags|=CoderSeekableStreamFlag;
 781   (void) RegisterMagickInfo(entry);
 782   entry=AcquireMagickInfo("ICON","ICON","Microsoft icon");
 783   entry->decoder=(DecodeImageHandler *) ReadICONImage;
 784   entry->encoder=(EncodeImageHandler *) WriteICONImage;
 785   entry->flags^=CoderAdjoinFlag;
 786   entry->flags|=CoderSeekableStreamFlag;
 787   (void) RegisterMagickInfo(entry);
 788   return(MagickImageCoderSignature);
 789 }
 790 \f
 791 /*
 792 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 793 %                                                                             %
 794 %                                                                             %
 795 %                                                                             %
 796 %   U n r e g i s t e r I C O N I m a g e                                     %
 797 %                                                                             %
 798 %                                                                             %
 799 %                                                                             %
 800 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 801 %
 802 %  UnregisterICONImage() removes format registrations made by the
 803 %  ICON module from the list of supported formats.
 804 %
 805 %  The format of the UnregisterICONImage method is:
 806 %
 807 %      UnregisterICONImage(void)
 808 %
 809 */
 810 ModuleExport void UnregisterICONImage(void)
 811 {
 812   (void) UnregisterMagickInfo("CUR");
 813   (void) UnregisterMagickInfo("ICO");
 814   (void) UnregisterMagickInfo("ICON");
 815 }
 816 \f
 817 /*
 818 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 819 %                                                                             %
 820 %                                                                             %
 821 %                                                                             %
 822 %   W r i t e I C O N I m a g e                                               %
 823 %                                                                             %
 824 %                                                                             %
 825 %                                                                             %
 826 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 827 %
 828 %  WriteICONImage() writes an image in Microsoft Windows bitmap encoded
 829 %  image format, version 3 for Windows or (if the image has a matte channel)
 830 %  version 4.
 831 %
 832 %  It encodes any subimage as a compressed PNG image ("BI_PNG)", only when its
 833 %  dimensions are 256x256 and image->compression is undefined or is defined as
 834 %  ZipCompression.
 835 %
 836 %  The format of the WriteICONImage method is:
 837 %
 838 %      MagickBooleanType WriteICONImage(const ImageInfo *image_info,
 839 %        Image *image,ExceptionInfo *exception)
 840 %
 841 %  A description of each parameter follows.
 842 %
 843 %    o image_info: the image info.
 844 %
 845 %    o image:  The image.
 846 %
 847 %    o exception: return any errors or warnings in this structure.
 848 %
 849 */
 850 static MagickBooleanType WriteICONImage(const ImageInfo *image_info,
 851   Image *image,ExceptionInfo *exception)
 852 {
 853   const char
 854     *option;
 855
 856   IconFile
 857     icon_file;
 858
 859   IconInfo
 860     icon_info;
 861
 862   Image
 863     *images,
 864     *next;
 865
 866   MagickBooleanType
 867     status;
 868
 869   MagickOffsetType
 870     offset,
 871     scene;
 872
 873   register const Quantum
 874     *p;
 875
 876   register ssize_t
 877     i,
 878     x;
 879
 880   register unsigned char
 881     *q;
 882
 883   size_t
 884     bytes_per_line,
 885     scanline_pad;
 886
 887   ssize_t
 888     y;
 889
 890   unsigned char
 891     bit,
 892     byte,
 893     *pixels;
 894
 895   /*
 896     Open output image file.
 897   */
 898   assert(image_info != (const ImageInfo *) NULL);
 899   assert(image_info->signature == MagickCoreSignature);
 900   assert(image != (Image *) NULL);
 901   assert(image->signature == MagickCoreSignature);
 902     (void) LogMagickEvent(CoderEvent,GetMagickModule(),"%s",image->filename);
 903   assert(exception != (ExceptionInfo *) NULL);
 904   assert(exception->signature == MagickCoreSignature);
 905   status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
 906   if (status == MagickFalse)
 907     return(status);
 908   images=(Image *) NULL;
 909   option=GetImageOption(image_info,"icon:auto-resize");
 910   if (option != (const char *) NULL)
 911     {
 912       images=AutoResizeImage(image,option,&scene,exception);
 913       if (images == (Image *) NULL)
 914         ThrowWriterException(ImageError,"InvalidDimensions");
 915     }
 916   else
 917     {
 918       scene=0;
 919       next=image;
 920       do
 921       {
 922         if ((image->columns > 256L) || (image->rows > 256L))
 923           ThrowWriterException(ImageError,"WidthOrHeightExceedsLimit");
 924         scene++;
 925         next=SyncNextImageInList(next);
 926       } while ((next != (Image *) NULL) && (image_info->adjoin != MagickFalse));
 927     }
 928   /*
 929     Dump out a ICON header template to be properly initialized later.
 930   */
 931   (void) WriteBlobLSBShort(image,0);
 932   (void) WriteBlobLSBShort(image,1);
 933   (void) WriteBlobLSBShort(image,(unsigned char) scene);
 934   (void) ResetMagickMemory(&icon_file,0,sizeof(icon_file));
 935   (void) ResetMagickMemory(&icon_info,0,sizeof(icon_info));
 936   scene=0;
 937   next=(images != (Image *) NULL) ? images : image;
 938   do
 939   {
 940     (void) WriteBlobByte(image,icon_file.directory[scene].width);
 941     (void) WriteBlobByte(image,icon_file.directory[scene].height);
 942     (void) WriteBlobByte(image,icon_file.directory[scene].colors);
 943     (void) WriteBlobByte(image,icon_file.directory[scene].reserved);
 944     (void) WriteBlobLSBShort(image,icon_file.directory[scene].planes);
 945     (void) WriteBlobLSBShort(image,icon_file.directory[scene].bits_per_pixel);
 946     (void) WriteBlobLSBLong(image,(unsigned int)
 947       icon_file.directory[scene].size);
 948     (void) WriteBlobLSBLong(image,(unsigned int)
 949       icon_file.directory[scene].offset);
 950     scene++;
 951     next=SyncNextImageInList(next);
 952   } while ((next != (Image *) NULL) && (image_info->adjoin != MagickFalse));
 953   scene=0;
 954   next=(images != (Image *) NULL) ? images : image;
 955   do
 956   {
 957     if ((next->columns > 255L) && (next->rows > 255L) &&
 958         ((next->compression == UndefinedCompression) ||
 959         (next->compression == ZipCompression)))
 960       {
 961         Image
 962           *write_image;
 963
 964         ImageInfo
 965           *write_info;
 966
 967         size_t
 968           length;
 969
 970         unsigned char
 971           *png;
 972
 973         write_image=CloneImage(next,0,0,MagickTrue,exception);
 974         if (write_image == (Image *) NULL)
 975           {
 976             images=DestroyImageList(images);
 977             return(MagickFalse);
 978           }
 979         write_info=CloneImageInfo(image_info);
 980         (void) CopyMagickString(write_info->filename,"PNG:",MagickPathExtent);
 981
 982         /* Don't write any ancillary chunks except for gAMA */
 983         (void) SetImageArtifact(write_image,"png:include-chunk","none,gama");
 984
 985         /* Only write PNG32 formatted PNG (32-bit RGBA), 8 bits per channel */
 986         (void) SetImageArtifact(write_image,"png:format","png32");
 987
 988         png=(unsigned char *) ImageToBlob(write_info,write_image,&length,
 989           exception);
 990         write_image=DestroyImageList(write_image);
 991         write_info=DestroyImageInfo(write_info);
 992         if (png == (unsigned char *) NULL)
 993           {
 994             images=DestroyImageList(images);
 995             return(MagickFalse);
 996           }
 997         icon_file.directory[scene].width=0;
 998         icon_file.directory[scene].height=0;
 999         icon_file.directory[scene].colors=0;
1000         icon_file.directory[scene].reserved=0;
1001         icon_file.directory[scene].planes=1;
1002         icon_file.directory[scene].bits_per_pixel=32;
1003         icon_file.directory[scene].size=(size_t) length;
1004         icon_file.directory[scene].offset=(size_t) TellBlob(image);
1005         (void) WriteBlob(image,(size_t) length,png);
1006         png=(unsigned char *) RelinquishMagickMemory(png);
1007       }
1008     else
1009       {
1010         /*
1011           Initialize ICON raster file header.
1012         */
1013         (void) TransformImageColorspace(next,sRGBColorspace,exception);
1014         icon_info.file_size=14+12+28;
1015         icon_info.offset_bits=icon_info.file_size;
1016         icon_info.compression=BI_RGB;
1017         if ((next->storage_class != DirectClass) && (next->colors > 256))
1018           (void) SetImageStorageClass(next,DirectClass,exception);
1019         if (next->storage_class == DirectClass)
1020           {
1021             /*
1022               Full color ICON raster.
1023             */
1024             icon_info.number_colors=0;
1025             icon_info.bits_per_pixel=32;
1026             icon_info.compression=(size_t) BI_RGB;
1027           }
1028         else
1029           {
1030             size_t
1031               one;
1032
1033             /*
1034               Colormapped ICON raster.
1035             */
1036             icon_info.bits_per_pixel=8;
1037             if (next->colors <= 256)
1038               icon_info.bits_per_pixel=8;
1039             if (next->colors <= 16)
1040               icon_info.bits_per_pixel=4;
1041             if (next->colors <= 2)
1042               icon_info.bits_per_pixel=1;
1043             one=1;
1044             icon_info.number_colors=one << icon_info.bits_per_pixel;
1045             if (icon_info.number_colors < next->colors)
1046               {
1047                 (void) SetImageStorageClass(next,DirectClass,exception);
1048                 icon_info.number_colors=0;
1049                 icon_info.bits_per_pixel=(unsigned short) 24;
1050                 icon_info.compression=(size_t) BI_RGB;
1051               }
1052             else
1053               {
1054                 size_t
1055                   one;
1056
1057                 one=1;
1058                 icon_info.file_size+=3*(one << icon_info.bits_per_pixel);
1059                 icon_info.offset_bits+=3*(one << icon_info.bits_per_pixel);
1060                 icon_info.file_size+=(one << icon_info.bits_per_pixel);
1061                 icon_info.offset_bits+=(one << icon_info.bits_per_pixel);
1062               }
1063           }
1064         bytes_per_line=(((next->columns*icon_info.bits_per_pixel)+31) &
1065           ~31) >> 3;
1066         icon_info.ba_offset=0;
1067         icon_info.width=(ssize_t) next->columns;
1068         icon_info.height=(ssize_t) next->rows;
1069         icon_info.planes=1;
1070         icon_info.image_size=bytes_per_line*next->rows;
1071         icon_info.size=40;
1072         icon_info.size+=(4*icon_info.number_colors);
1073         icon_info.size+=icon_info.image_size;
1074         icon_info.size+=(((icon_info.width+31) & ~31) >> 3)*icon_info.height;
1075         icon_info.file_size+=icon_info.image_size;
1076         icon_info.x_pixels=0;
1077         icon_info.y_pixels=0;
1078         switch (next->units)
1079         {
1080           case UndefinedResolution:
1081           case PixelsPerInchResolution:
1082           {
1083             icon_info.x_pixels=(size_t) (100.0*next->resolution.x/2.54);
1084             icon_info.y_pixels=(size_t) (100.0*next->resolution.y/2.54);
1085             break;
1086           }
1087           case PixelsPerCentimeterResolution:
1088           {
1089             icon_info.x_pixels=(size_t) (100.0*next->resolution.x);
1090             icon_info.y_pixels=(size_t) (100.0*next->resolution.y);
1091             break;
1092           }
1093         }
1094         icon_info.colors_important=icon_info.number_colors;
1095         /*
1096           Convert MIFF to ICON raster pixels.
1097         */
1098         pixels=(unsigned char *) AcquireQuantumMemory((size_t)
1099           icon_info.image_size,sizeof(*pixels));
1100         if (pixels == (unsigned char *) NULL)
1101           {
1102             images=DestroyImageList(images);
1103             ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
1104           }
1105         (void) ResetMagickMemory(pixels,0,(size_t) icon_info.image_size);
1106         switch (icon_info.bits_per_pixel)
1107         {
1108           case 1:
1109           {
1110             size_t
1111               bit,
1112               byte;
1113
1114             /*
1115               Convert PseudoClass image to a ICON monochrome image.
1116             */
1117             for (y=0; y < (ssize_t) next->rows; y++)
1118             {
1119               p=GetVirtualPixels(next,0,y,next->columns,1,exception);
1120               if (p == (const Quantum *) NULL)
1121                 break;
1122               q=pixels+(next->rows-y-1)*bytes_per_line;
1123               bit=0;
1124               byte=0;
1125               for (x=0; x < (ssize_t) next->columns; x++)
1126               {
1127                 byte<<=1;
1128                 byte|=GetPixelIndex(next,p) != 0 ? 0x01 : 0x00;
1129                 bit++;
1130                 if (bit == 8)
1131                   {
1132                     *q++=(unsigned char) byte;
1133                     bit=0;
1134                     byte=0;
1135                   }
1136                 p+=GetPixelChannels(image);
1137               }
1138               if (bit != 0)
1139                 *q++=(unsigned char) (byte << (8-bit));
1140               if (next->previous == (Image *) NULL)
1141                 {
1142                   status=SetImageProgress(next,SaveImageTag,y,next->rows);
1143                   if (status == MagickFalse)
1144                     break;
1145                 }
1146             }
1147             break;
1148           }
1149           case 4:
1150           {
1151             size_t
1152               nibble,
1153               byte;
1154
1155             /*
1156               Convert PseudoClass image to a ICON monochrome image.
1157             */
1158             for (y=0; y < (ssize_t) next->rows; y++)
1159             {
1160               p=GetVirtualPixels(next,0,y,next->columns,1,exception);
1161               if (p == (const Quantum *) NULL)
1162                 break;
1163               q=pixels+(next->rows-y-1)*bytes_per_line;
1164               nibble=0;
1165               byte=0;
1166               for (x=0; x < (ssize_t) next->columns; x++)
1167               {
1168                 byte<<=4;
1169                 byte|=((size_t) GetPixelIndex(next,p) & 0x0f);
1170                 nibble++;
1171                 if (nibble == 2)
1172                   {
1173                     *q++=(unsigned char) byte;
1174                     nibble=0;
1175                     byte=0;
1176                   }
1177                 p+=GetPixelChannels(image);
1178               }
1179               if (nibble != 0)
1180                 *q++=(unsigned char) (byte << 4);
1181               if (next->previous == (Image *) NULL)
1182                 {
1183                   status=SetImageProgress(next,SaveImageTag,y,next->rows);
1184                   if (status == MagickFalse)
1185                     break;
1186                 }
1187             }
1188             break;
1189           }
1190           case 8:
1191           {
1192             /*
1193               Convert PseudoClass packet to ICON pixel.
1194             */
1195             for (y=0; y < (ssize_t) next->rows; y++)
1196             {
1197               p=GetVirtualPixels(next,0,y,next->columns,1,exception);
1198               if (p == (const Quantum *) NULL)
1199                 break;
1200               q=pixels+(next->rows-y-1)*bytes_per_line;
1201               for (x=0; x < (ssize_t) next->columns; x++)
1202               {
1203                 *q++=(unsigned char) GetPixelIndex(next,p);
1204                 p+=GetPixelChannels(image);
1205               }
1206               if (next->previous == (Image *) NULL)
1207                 {
1208                   status=SetImageProgress(next,SaveImageTag,y,next->rows);
1209                   if (status == MagickFalse)
1210                     break;
1211                 }
1212             }
1213             break;
1214           }
1215           case 24:
1216           case 32:
1217           {
1218             /*
1219               Convert DirectClass packet to ICON BGR888 or BGRA8888 pixel.
1220             */
1221             for (y=0; y < (ssize_t) next->rows; y++)
1222             {
1223               p=GetVirtualPixels(next,0,y,next->columns,1,exception);
1224               if (p == (const Quantum *) NULL)
1225                 break;
1226               q=pixels+(next->rows-y-1)*bytes_per_line;
1227               for (x=0; x < (ssize_t) next->columns; x++)
1228               {
1229                 *q++=ScaleQuantumToChar(GetPixelBlue(next,p));
1230                 *q++=ScaleQuantumToChar(GetPixelGreen(next,p));
1231                 *q++=ScaleQuantumToChar(GetPixelRed(next,p));
1232                 if (next->alpha_trait == UndefinedPixelTrait)
1233                   *q++=ScaleQuantumToChar(QuantumRange);
1234                 else
1235                   *q++=ScaleQuantumToChar(GetPixelAlpha(next,p));
1236                 p+=GetPixelChannels(next);
1237               }
1238               if (icon_info.bits_per_pixel == 24)
1239                 for (x=3L*(ssize_t) next->columns; x < (ssize_t) bytes_per_line; x++)
1240                   *q++=0x00;
1241               if (next->previous == (Image *) NULL)
1242                 {
1243                   status=SetImageProgress(next,SaveImageTag,y,next->rows);
1244                   if (status == MagickFalse)
1245                     break;
1246                 }
1247             }
1248             break;
1249           }
1250         }
1251         /*
1252           Write 40-byte version 3+ bitmap header.
1253         */
1254         icon_file.directory[scene].width=(unsigned char) icon_info.width;
1255         icon_file.directory[scene].height=(unsigned char) icon_info.height;
1256         icon_file.directory[scene].colors=(unsigned char)
1257           icon_info.number_colors;
1258         icon_file.directory[scene].reserved=0;
1259         icon_file.directory[scene].planes=icon_info.planes;
1260         icon_file.directory[scene].bits_per_pixel=icon_info.bits_per_pixel;
1261         icon_file.directory[scene].size=icon_info.size;
1262         icon_file.directory[scene].offset=(size_t) TellBlob(image);
1263         (void) WriteBlobLSBLong(image,(unsigned int) 40);
1264         (void) WriteBlobLSBLong(image,(unsigned int) icon_info.width);
1265         (void) WriteBlobLSBLong(image,(unsigned int) icon_info.height*2);
1266         (void) WriteBlobLSBShort(image,icon_info.planes);
1267         (void) WriteBlobLSBShort(image,icon_info.bits_per_pixel);
1268         (void) WriteBlobLSBLong(image,(unsigned int) icon_info.compression);
1269         (void) WriteBlobLSBLong(image,(unsigned int) icon_info.image_size);
1270         (void) WriteBlobLSBLong(image,(unsigned int) icon_info.x_pixels);
1271         (void) WriteBlobLSBLong(image,(unsigned int) icon_info.y_pixels);
1272         (void) WriteBlobLSBLong(image,(unsigned int) icon_info.number_colors);
1273         (void) WriteBlobLSBLong(image,(unsigned int) icon_info.colors_important);
1274         if (next->storage_class == PseudoClass)
1275           {
1276             unsigned char
1277               *icon_colormap;
1278
1279             /*
1280               Dump colormap to file.
1281             */
1282             icon_colormap=(unsigned char *) AcquireQuantumMemory((size_t)
1283               (1UL << icon_info.bits_per_pixel),4UL*sizeof(*icon_colormap));
1284             if (icon_colormap == (unsigned char *) NULL)
1285               {
1286                 images=DestroyImageList(images);
1287                 ThrowWriterException(ResourceLimitError,
1288                   "MemoryAllocationFailed");
1289               }
1290             q=icon_colormap;
1291             for (i=0; i < (ssize_t) next->colors; i++)
1292             {
1293               *q++=ScaleQuantumToChar(next->colormap[i].blue);
1294               *q++=ScaleQuantumToChar(next->colormap[i].green);
1295               *q++=ScaleQuantumToChar(next->colormap[i].red);
1296               *q++=(unsigned char) 0x0;
1297             }
1298             for ( ; i < (ssize_t) (1UL << icon_info.bits_per_pixel); i++)
1299             {
1300               *q++=(unsigned char) 0x00;
1301               *q++=(unsigned char) 0x00;
1302               *q++=(unsigned char) 0x00;
1303               *q++=(unsigned char) 0x00;
1304             }
1305             (void) WriteBlob(image,(size_t) (4UL*(1UL <<
1306               icon_info.bits_per_pixel)),icon_colormap);
1307             icon_colormap=(unsigned char *) RelinquishMagickMemory(
1308               icon_colormap);
1309           }
1310         (void) WriteBlob(image,(size_t) icon_info.image_size,pixels);
1311         pixels=(unsigned char *) RelinquishMagickMemory(pixels);
1312         /*
1313           Write matte mask.
1314         */
1315         scanline_pad=(((next->columns+31) & ~31)-next->columns) >> 3;
1316         for (y=((ssize_t) next->rows - 1); y >= 0; y--)
1317         {
1318           p=GetVirtualPixels(next,0,y,next->columns,1,exception);
1319           if (p == (const Quantum *) NULL)
1320             break;
1321           bit=0;
1322           byte=0;
1323           for (x=0; x < (ssize_t) next->columns; x++)
1324           {
1325             byte<<=1;
1326             if ((next->alpha_trait != UndefinedPixelTrait) &&
1327                 (GetPixelAlpha(next,p) == (Quantum) TransparentAlpha))
1328               byte|=0x01;
1329             bit++;
1330             if (bit == 8)
1331               {
1332                 (void) WriteBlobByte(image,(unsigned char) byte);
1333                 bit=0;
1334                 byte=0;
1335               }
1336             p+=GetPixelChannels(next);
1337           }
1338           if (bit != 0)
1339             (void) WriteBlobByte(image,(unsigned char) (byte << (8-bit)));
1340           for (i=0; i < (ssize_t) scanline_pad; i++)
1341             (void) WriteBlobByte(image,(unsigned char) 0);
1342         }
1343       }
1344     if (GetNextImageInList(next) == (Image *) NULL)
1345       break;
1346     status=SetImageProgress(next,SaveImagesTag,scene++,
1347       GetImageListLength(next));
1348     if (status == MagickFalse)
1349       break;
1350     next=SyncNextImageInList(next);
1351   } while ((next != (Image *) NULL) && (image_info->adjoin != MagickFalse));
1352   offset=SeekBlob(image,0,SEEK_SET);
1353   (void) offset;
1354   (void) WriteBlobLSBShort(image,0);
1355   (void) WriteBlobLSBShort(image,1);
1356   (void) WriteBlobLSBShort(image,(unsigned short) (scene+1));
1357   scene=0;
1358   next=(images != (Image *) NULL) ? images : image;
1359   do
1360   {
1361     (void) WriteBlobByte(image,icon_file.directory[scene].width);
1362     (void) WriteBlobByte(image,icon_file.directory[scene].height);
1363     (void) WriteBlobByte(image,icon_file.directory[scene].colors);
1364     (void) WriteBlobByte(image,icon_file.directory[scene].reserved);
1365     (void) WriteBlobLSBShort(image,icon_file.directory[scene].planes);
1366     (void) WriteBlobLSBShort(image,icon_file.directory[scene].bits_per_pixel);
1367     (void) WriteBlobLSBLong(image,(unsigned int)
1368       icon_file.directory[scene].size);
1369     (void) WriteBlobLSBLong(image,(unsigned int)
1370       icon_file.directory[scene].offset);
1371     scene++;
1372     next=SyncNextImageInList(next);
1373   } while ((next != (Image *) NULL) && (image_info->adjoin != MagickFalse));
1374   (void) CloseBlob(image);
1375   images=DestroyImageList(images);
1376   return(MagickTrue);
1377 }