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

   1 /*
   2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   3 %                                                                             %
   4 %                                                                             %
   5 %                                                                             %
   6 %                        PPPP    AAA   L      M   M                           %
   7 %                        P   P  A   A  L      MM MM                           %
   8 %                        PPPP   AAAAA  L      M M M                           %
   9 %                        P      A   A  L      M   M                           %
  10 %                        P      A   A  LLLLL  M   M                           %
  11 %                                                                             %
  12 %                                                                             %
  13 %                          Read/Write Palm Pixmap.                            %
  14 %                                                                             %
  15 %                                                                             %
  16 %                              Software Design                                %
  17 %                            Christopher R. Hawks                             %
  18 %                               December 2001                                 %
  19 %                                                                             %
  20 %  Copyright 1999-2004 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 %  Based on pnmtopalm by Bill Janssen and ppmtobmp by Ian Goldberg.
  38 %
  39 */
  40 \f
  41 /*
  42   Include declarations.
  43 */
  44 #include "magick/studio.h"
  45 #include "magick/blob.h"
  46 #include "magick/blob-private.h"
  47 #include "magick/cache.h"
  48 #include "magick/color.h"
  49 #include "magick/colormap.h"
  50 #include "magick/colormap-private.h"
  51 #include "magick/color-private.h"
  52 #include "magick/colorspace.h"
  53 #include "magick/constitute.h"
  54 #include "magick/exception.h"
  55 #include "magick/histogram.h"
  56 #include "magick/image.h"
  57 #include "magick/list.h"
  58 #include "magick/magick.h"
  59 #include "magick/memory_.h"
  60 #include "magick/monitor.h"
  61 #include "magick/monitor-private.h"
  62 #include "magick/paint.h"
  63 #include "magick/pixel-private.h"
  64 #include "magick/property.h"
  65 #include "magick/quantize.h"
  66 #include "magick/quantum-private.h"
  67 #include "magick/static.h"
  68 #include "magick/string_.h"
  69 #include "magick/module.h"
  70 #include "magick/utility.h"
  71 \f
  72 /*
  73   Define declarations.
  74 */
  75 #define PALM_IS_COMPRESSED_FLAG  0x8000
  76 #define PALM_HAS_COLORMAP_FLAG  0x4000
  77 #define PALM_HAS_FOUR_BYTE_FIELD  0x0200
  78 #define PALM_HAS_TRANSPARENCY_FLAG  0x2000
  79 #define PALM_IS_INDIRECT  0x1000
  80 #define PALM_IS_FOR_SCREEN  0x0800
  81 #define PALM_IS_DIRECT_COLOR  0x0400
  82 #define PALM_COMPRESSION_SCANLINE  0x00
  83 #define PALM_COMPRESSION_RLE  0x01
  84 #define PALM_COMPRESSION_NONE  0xFF
  85 \f
  86 /*
  87  The 256 color system palette for Palm Computing Devices.
  88 */
  89 static unsigned char
  90   PalmPalette[256][3] =
  91   {
  92     {255, 255,255}, {255, 204,255}, {255, 153,255}, {255, 102,255},
  93     {255,  51,255}, {255,   0,255}, {255, 255,204}, {255, 204,204},
  94     {255, 153,204}, {255, 102,204}, {255,  51,204}, {255,   0,204},
  95     {255, 255,153}, {255, 204,153}, {255, 153,153}, {255, 102,153},
  96     {255,  51,153}, {255,   0,153}, {204, 255,255}, {204, 204,255},
  97     {204, 153,255}, {204, 102,255}, {204,  51,255}, {204,   0,255},
  98     {204, 255,204}, {204, 204,204}, {204, 153,204}, {204, 102,204},
  99     {204,  51,204}, {204,   0,204}, {204, 255,153}, {204, 204,153},
 100     {204, 153,153}, {204, 102,153}, {204,  51,153}, {204,   0,153},
 101     {153, 255,255}, {153, 204,255}, {153, 153,255}, {153, 102,255},
 102     {153,  51,255}, {153,   0,255}, {153, 255,204}, {153, 204,204},
 103     {153, 153,204}, {153, 102,204}, {153,  51,204}, {153,   0,204},
 104     {153, 255,153}, {153, 204,153}, {153, 153,153}, {153, 102,153},
 105     {153,  51,153}, {153,   0,153}, {102, 255,255}, {102, 204,255},
 106     {102, 153,255}, {102, 102,255}, {102,  51,255}, {102,   0,255},
 107     {102, 255,204}, {102, 204,204}, {102, 153,204}, {102, 102,204},
 108     {102,  51,204}, {102,   0,204}, {102, 255,153}, {102, 204,153},
 109     {102, 153,153}, {102, 102,153}, {102,  51,153}, {102,   0,153},
 110     { 51, 255,255}, { 51, 204,255}, { 51, 153,255}, { 51, 102,255},
 111     { 51,  51,255}, { 51,   0,255}, { 51, 255,204}, { 51, 204,204},
 112     { 51, 153,204}, { 51, 102,204}, { 51,  51,204}, { 51,   0,204},
 113     { 51, 255,153}, { 51, 204,153}, { 51, 153,153}, { 51, 102,153},
 114     { 51,  51,153}, { 51,   0,153}, {  0, 255,255}, {  0, 204,255},
 115     {  0, 153,255}, {  0, 102,255}, {  0,  51,255}, {  0,   0,255},
 116     {  0, 255,204}, {  0, 204,204}, {  0, 153,204}, {  0, 102,204},
 117     {  0,  51,204}, {  0,   0,204}, {  0, 255,153}, {  0, 204,153},
 118     {  0, 153,153}, {  0, 102,153}, {  0,  51,153}, {  0,   0,153},
 119     {255, 255,102}, {255, 204,102}, {255, 153,102}, {255, 102,102},
 120     {255,  51,102}, {255,   0,102}, {255, 255, 51}, {255, 204, 51},
 121     {255, 153, 51}, {255, 102, 51}, {255,  51, 51}, {255,   0, 51},
 122     {255, 255,  0}, {255, 204,  0}, {255, 153,  0}, {255, 102,  0},
 123     {255,  51,  0}, {255,   0,  0}, {204, 255,102}, {204, 204,102},
 124     {204, 153,102}, {204, 102,102}, {204,  51,102}, {204,   0,102},
 125     {204, 255, 51}, {204, 204, 51}, {204, 153, 51}, {204, 102, 51},
 126     {204,  51, 51}, {204,   0, 51}, {204, 255,  0}, {204, 204,  0},
 127     {204, 153,  0}, {204, 102,  0}, {204,  51,  0}, {204,   0,  0},
 128     {153, 255,102}, {153, 204,102}, {153, 153,102}, {153, 102,102},
 129     {153,  51,102}, {153,   0,102}, {153, 255, 51}, {153, 204, 51},
 130     {153, 153, 51}, {153, 102, 51}, {153,  51, 51}, {153,   0, 51},
 131     {153, 255,  0}, {153, 204,  0}, {153, 153,  0}, {153, 102,  0},
 132     {153,  51,  0}, {153,   0,  0}, {102, 255,102}, {102, 204,102},
 133     {102, 153,102}, {102, 102,102}, {102,  51,102}, {102,   0,102},
 134     {102, 255, 51}, {102, 204, 51}, {102, 153, 51}, {102, 102, 51},
 135     {102,  51, 51}, {102,   0, 51}, {102, 255,  0}, {102, 204,  0},
 136     {102, 153,  0}, {102, 102,  0}, {102,  51,  0}, {102,   0,  0},
 137     { 51, 255,102}, { 51, 204,102}, { 51, 153,102}, { 51, 102,102},
 138     { 51,  51,102}, { 51,   0,102}, { 51, 255, 51}, { 51, 204, 51},
 139     { 51, 153, 51}, { 51, 102, 51}, { 51,  51, 51}, { 51,   0, 51},
 140     { 51, 255,  0}, { 51, 204,  0}, { 51, 153,  0}, { 51, 102,  0},
 141     { 51,  51,  0}, { 51,   0,  0}, {  0, 255,102}, {  0, 204,102},
 142     {  0, 153,102}, {  0, 102,102}, {  0,  51,102}, {  0,   0,102},
 143     {  0, 255, 51}, {  0, 204, 51}, {  0, 153, 51}, {  0, 102, 51},
 144     {  0,  51, 51}, {  0,   0, 51}, {  0, 255,  0}, {  0, 204,  0},
 145     {  0, 153,  0}, {  0, 102,  0}, {  0,  51,  0}, { 17,  17, 17},
 146     { 34,  34, 34}, { 68,  68, 68}, { 85,  85, 85}, {119, 119,119},
 147     {136, 136,136}, {170, 170,170}, {187, 187,187}, {221, 221,221},
 148     {238, 238,238}, {192, 192,192}, {128,   0,  0}, {128,   0,128},
 149     {  0, 128,  0}, {  0, 128,128}, {  0,   0,  0}, {  0,   0,  0},
 150     {  0,   0,  0}, {  0,   0,  0}, {  0,   0,  0}, {  0,   0,  0},
 151     {  0,   0,  0}, {  0,   0,  0}, {  0,   0,  0}, {  0,   0,  0},
 152     {  0,   0,  0}, {  0,   0,  0}, {  0,   0,  0}, {  0,   0,  0},
 153     {  0,   0,  0}, {  0,   0,  0}, {  0,   0,  0}, {  0,   0,  0},
 154     {  0,   0,  0}, {  0,   0,  0}, {  0,   0,  0}, {  0,   0,  0},
 155     {  0,   0,  0}, {  0,   0,  0}, {  0,   0,  0}, {  0,   0,  0}
 156   };
 157 \f
 158 /*
 159   Forward declarations.
 160 */
 161 static MagickBooleanType
 162   WritePALMImage(const ImageInfo *,Image *);
 163 \f
 164 /*
 165 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 166 %                                                                             %
 167 %                                                                             %
 168 %                                                                             %
 169 %   F i n d C o l o r                                                         %
 170 %                                                                             %
 171 %                                                                             %
 172 %                                                                             %
 173 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 174 %
 175 %  FindColor() returns the index of the matching entry from PalmPalette for a
 176 %  given PixelPacket.
 177 %
 178 %  The format of the FindColor method is:
 179 %
 180 %      int FindColor(PixelPacket *pixel)
 181 %
 182 %  A description of each parameter follows:
 183 %
 184 %    o int: the index of the matching color or -1 if not found/
 185 %
 186 %    o pixel: a pointer to the PixelPacket to be matched.
 187 %
 188 */
 189 static int FindColor(PixelPacket *pixel)
 190 {
 191   register ssize_t
 192     i;
 193
 194   for (i=0; i < 256; i++)
 195     if (ScaleQuantumToChar(pixel->red) == PalmPalette[i][0] &&
 196         ScaleQuantumToChar(pixel->green) == PalmPalette[i][1] &&
 197         ScaleQuantumToChar(pixel->blue) == PalmPalette[i][2])
 198       return(i);
 199   return(-1);
 200 }
 201 \f
 202 /*
 203 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 204 %                                                                             %
 205 %                                                                             %
 206 %                                                                             %
 207 %   R e a d P A L M I m a g e                                                 %
 208 %                                                                             %
 209 %                                                                             %
 210 %                                                                             %
 211 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 212 %
 213 %  ReadPALMImage() reads an image of raw bites in LSB order and returns it.  It
 214 %  allocates the memory necessary for the new Image structure and returns a
 215 %  pointer to the new image.
 216 %
 217 %  The format of the ReadPALMImage method is:
 218 %
 219 %      Image *ReadPALMImage(const ImageInfo *image_info,
 220 %        ExceptionInfo *exception)
 221 %
 222 %  A description of each parameter follows:
 223 %
 224 %    o image_info: Specifies a pointer to an ImageInfo structure.
 225 %
 226 %    o exception: return any errors or warnings in this structure.
 227 %
 228 */
 229
 230 static inline size_t MagickMax(const size_t x,const size_t y)
 231 {
 232   if (x > y)
 233     return(x);
 234   return(y);
 235 }
 236
 237 static inline ssize_t MagickMin(const ssize_t x,const ssize_t y)
 238 {
 239   if (x < y)
 240     return(x);
 241   return(y);
 242 }
 243
 244 static Image *ReadPALMImage(const ImageInfo *image_info,
 245   ExceptionInfo *exception)
 246 {
 247   Image
 248     *image;
 249
 250   IndexPacket
 251     index;
 252
 253   ssize_t
 254     y;
 255
 256   MagickBooleanType
 257     status;
 258
 259   MagickOffsetType
 260     totalOffset,
 261     seekNextDepth;
 262
 263   MagickPixelPacket
 264     transpix;
 265
 266   register IndexPacket
 267     *indexes;
 268
 269   register ssize_t
 270     i,
 271     x;
 272
 273   register PixelPacket
 274     *q;
 275
 276   ssize_t
 277     count;
 278
 279   unsigned char
 280     *lastrow,
 281     *one_row,
 282     *ptr;
 283
 284   size_t
 285     bytes_per_row,
 286     flags,
 287     bits_per_pixel,
 288     version,
 289     nextDepthOffset,
 290     transparentIndex,
 291     compressionType,
 292     byte,
 293     mask,
 294     redbits,
 295     greenbits,
 296     bluebits,
 297     one,
 298     pad,
 299     size,
 300     bit;
 301
 302   unsigned short
 303     color16;
 304
 305   /*
 306     Open image file.
 307   */
 308   assert(image_info != (const ImageInfo *) NULL);
 309   assert(image_info->signature == MagickSignature);
 310   if (image_info->debug != MagickFalse)
 311     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
 312       image_info->filename);
 313   assert(exception != (ExceptionInfo *) NULL);
 314   assert(exception->signature == MagickSignature);
 315   image=AcquireImage(image_info);
 316   status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
 317   if (status == MagickFalse)
 318     {
 319       (void) DestroyImageList(image);
 320       return((Image *) NULL);
 321     }
 322   totalOffset=0;
 323   do
 324   {
 325     image->columns=ReadBlobMSBShort(image);
 326     image->rows=ReadBlobMSBShort(image);
 327     if (EOFBlob(image) != MagickFalse)
 328       ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 329     /*
 330       Copied from coders/pnm.c. TODO other checks ...
 331     */
 332     if ((image->columns == 0) || (image->rows == 0))
 333       ThrowReaderException(CorruptImageError,"NegativeOrZeroImageSize");
 334     bytes_per_row=ReadBlobMSBShort(image);
 335     flags=ReadBlobMSBShort(image);
 336     bits_per_pixel=(size_t) ReadBlobByte(image);
 337     if (bits_per_pixel > 16)
 338       ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 339     version=(size_t) ReadBlobByte(image);
 340     nextDepthOffset=(size_t) ReadBlobMSBShort(image);
 341     transparentIndex=(size_t) ReadBlobByte(image);
 342     compressionType=(size_t) ReadBlobByte(image);
 343     pad=ReadBlobMSBShort(image);
 344     /*
 345       Initialize image colormap.
 346     */
 347     one=1;
 348     if ((bits_per_pixel < 16) &&
 349         (AcquireImageColormap(image,one << bits_per_pixel) == MagickFalse))
 350       ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 351     GetMagickPixelPacket(image,&transpix);
 352     if (bits_per_pixel == 16)  /* Direct Color */
 353       {
 354         redbits=(size_t) ReadBlobByte(image);  /* # of bits of red */
 355         greenbits=(size_t) ReadBlobByte(image);  /* # of bits of green */
 356         bluebits=(size_t) ReadBlobByte(image);  /* # of bits of blue */
 357         ReadBlobByte(image);  /* reserved by Palm */
 358         ReadBlobByte(image);  /* reserved by Palm */
 359         transpix.red=(MagickRealType) (QuantumRange*ReadBlobByte(image)/31);
 360         transpix.green=(MagickRealType) (QuantumRange*ReadBlobByte(image)/63);
 361         transpix.blue=(MagickRealType) (QuantumRange*ReadBlobByte(image)/31);
 362       }
 363     if (bits_per_pixel == 8)
 364       {
 365         IndexPacket
 366           index;
 367
 368         if (flags & PALM_HAS_COLORMAP_FLAG)
 369           {
 370             count=(ssize_t) ReadBlobMSBShort(image);
 371             for (i=0; i < (ssize_t) count; i++)
 372             {
 373               ReadBlobByte(image);
 374               index=ConstrainColormapIndex(image,255-i);
 375               image->colormap[(int) index].red=
 376                 ScaleCharToQuantum((unsigned char) ReadBlobByte(image));
 377               image->colormap[(int) index].green=
 378                 ScaleCharToQuantum((unsigned char) ReadBlobByte(image));
 379               image->colormap[(int) index].blue=
 380                 ScaleCharToQuantum((unsigned char) ReadBlobByte(image));
 381           }
 382         }
 383       else
 384         {
 385           for (i=0; i < (ssize_t) (1L << bits_per_pixel); i++)
 386           {
 387             index=ConstrainColormapIndex(image,255-i);
 388             image->colormap[(int) index].red=
 389               ScaleCharToQuantum(PalmPalette[i][0]);
 390             image->colormap[(int) index].green=
 391               ScaleCharToQuantum(PalmPalette[i][1]);
 392             image->colormap[(int) index].blue=
 393               ScaleCharToQuantum(PalmPalette[i][2]);
 394           }
 395         }
 396       }
 397     if (flags & PALM_IS_COMPRESSED_FLAG)
 398       size=ReadBlobMSBShort(image);
 399     image->storage_class=DirectClass;
 400     if (bits_per_pixel < 16)
 401       {
 402         image->storage_class=PseudoClass;
 403         image->depth=8;
 404       }
 405     one_row=(unsigned char *) AcquireQuantumMemory(bytes_per_row,
 406       sizeof(*one_row));
 407     if (one_row == (unsigned char *) NULL)
 408       ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 409     lastrow=(unsigned char *) NULL;
 410     if (compressionType == PALM_COMPRESSION_SCANLINE) {
 411       lastrow=(unsigned char *) AcquireQuantumMemory(bytes_per_row,
 412         sizeof(*lastrow));
 413     if (lastrow == (unsigned char *) NULL)
 414       ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 415     }
 416     mask=(1l << bits_per_pixel)-1;
 417     for (y = 0; y < (ssize_t) image->rows; y++)
 418     {
 419       if ((flags & PALM_IS_COMPRESSED_FLAG) == 0)
 420         {
 421           /* TODO move out of loop! */
 422           image->compression=NoCompression;
 423           count=ReadBlob(image,bytes_per_row,one_row);
 424         }
 425       else
 426         {
 427           if (compressionType == PALM_COMPRESSION_RLE)
 428             {
 429               /* TODO move out of loop! */
 430               image->compression=RLECompression;
 431               for (i=0; i < (ssize_t) bytes_per_row; )
 432               {
 433                 count=(ssize_t) ReadBlobByte(image);
 434                 count=MagickMin(count,(ssize_t) bytes_per_row-i);
 435                 byte=(size_t) ReadBlobByte(image);
 436                 (void) ResetMagickMemory(one_row+i,(int) byte,(size_t) count);
 437                 i+=count;
 438               }
 439           }
 440         else
 441           if (compressionType == PALM_COMPRESSION_SCANLINE)
 442             {
 443               size_t
 444                 one;
 445
 446               /* TODO move out of loop! */
 447               one=1;
 448               image->compression=FaxCompression;
 449               for (i=0; i < (ssize_t) bytes_per_row; i+=8)
 450               {
 451                 count=(ssize_t) ReadBlobByte(image);
 452                 byte=1UL*MagickMin((ssize_t) bytes_per_row-i,8);
 453                 for (bit=0; bit < byte; bit++)
 454                 {
 455                   if ((y == 0) || (count & (one << (7 - bit))))
 456                     one_row[i+bit]=(unsigned char) ReadBlobByte(image);
 457                   else
 458                     one_row[i+bit]=lastrow[i+bit];
 459                 }
 460               }
 461               (void) CopyMagickMemory(lastrow, one_row, bytes_per_row);
 462             }
 463         }
 464       ptr=one_row;
 465       q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 466       if (q == (PixelPacket *) NULL)
 467         break;
 468       indexes=GetAuthenticIndexQueue(image);
 469       if (bits_per_pixel == 16)
 470         {
 471           if (image->columns > (2*bytes_per_row))
 472             ThrowReaderException(CorruptImageError,"CorruptImage");
 473           for (x=0; x < (ssize_t) image->columns; x++)
 474           {
 475             color16=(*ptr++ << 8);
 476             color16|=(*ptr++);
 477             q->red=(Quantum) ((QuantumRange*((color16 >> 11) & 0x1f))/0x1f);
 478             q->green=(Quantum) ((QuantumRange*((color16 >> 5) & 0x3f))/0x3f);
 479             q->blue=(Quantum) ((QuantumRange*((color16 >> 0) & 0x1f))/0x1f);
 480             SetOpacityPixelComponent(q,OpaqueOpacity);
 481             q++;
 482           }
 483         }
 484       else
 485         {
 486           bit=8-bits_per_pixel;
 487           for (x=0; x < (ssize_t) image->columns; x++)
 488           {
 489             if ((size_t) (ptr-one_row) >= bytes_per_row)
 490               ThrowReaderException(CorruptImageError,"CorruptImage");
 491             index=(IndexPacket) (mask-(((*ptr) & (mask << bit)) >> bit));
 492             indexes[x]=index;
 493             *q++=image->colormap[(ssize_t) index];
 494             if (bit)
 495               bit-=bits_per_pixel;
 496             else
 497               {
 498                 ptr++;
 499                 bit=8-bits_per_pixel;
 500               }
 501           }
 502           if (SyncAuthenticPixels(image,exception) == MagickFalse)
 503             break;
 504         }
 505         if (image->previous == (Image *) NULL)
 506           {
 507             status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
 508                 image->rows);
 509             if (status == MagickFalse)
 510               break;
 511           }
 512       }
 513     if (flags & PALM_HAS_TRANSPARENCY_FLAG)
 514       {
 515         if (bits_per_pixel != 16)
 516           SetMagickPixelPacket(image,image->colormap+(mask-transparentIndex),
 517             (const IndexPacket *) NULL,&transpix);
 518         (void) TransparentPaintImage(image,&transpix,(Quantum)
 519           TransparentOpacity,MagickFalse);
 520       }
 521     one_row=(unsigned char *) RelinquishMagickMemory(one_row);
 522     if (compressionType == PALM_COMPRESSION_SCANLINE)
 523     lastrow=(unsigned char *) RelinquishMagickMemory(lastrow);
 524     /*
 525       Proceed to next image. Copied from coders/pnm.c
 526     */
 527     if (image_info->number_scenes != 0)
 528       if (image->scene >= (image_info->scene+image_info->number_scenes-1))
 529         break;
 530     if (nextDepthOffset != 0)
 531       {
 532         /*
 533           Skip to next image.
 534         */
 535         totalOffset+=(MagickOffsetType) (nextDepthOffset*4);
 536         if (totalOffset >= (MagickOffsetType) GetBlobSize(image))
 537           {
 538             ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 539           }
 540         else
 541           {
 542             seekNextDepth=SeekBlob(image,totalOffset,SEEK_SET);
 543           }
 544         if (seekNextDepth != totalOffset)
 545           ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 546         /*
 547           Allocate next image structure. Copied from coders/pnm.c
 548         */
 549         AcquireNextImage(image_info,image);
 550         if (GetNextImageInList(image) == (Image *) NULL)
 551           {
 552             (void) DestroyImageList(image);
 553             return((Image *) NULL);
 554           }
 555         image=SyncNextImageInList(image);
 556         status=SetImageProgress(image,LoadImagesTag,TellBlob(image),
 557           GetBlobSize(image));
 558         if (status == MagickFalse)
 559           break;
 560       }
 561   } while (nextDepthOffset != 0);
 562   (void) CloseBlob(image);
 563   return(GetFirstImageInList(image));
 564 }
 565 \f
 566 /*
 567 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 568 %                                                                             %
 569 %                                                                             %
 570 %                                                                             %
 571 %   R e g i s t e r P A L M I m a g e                                         %
 572 %                                                                             %
 573 %                                                                             %
 574 %                                                                             %
 575 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 576 %
 577 %  RegisterPALMImage() adds properties for the PALM image format to the list of
 578 %  supported formats.  The properties include the image format tag, a method to
 579 %  read and/or write the format, whether the format supports the saving of more
 580 %  than one frame to the same file or blob, whether the format supports native
 581 %  in-memory I/O, and a brief description of the format.
 582 %
 583 %  The format of the RegisterPALMImage method is:
 584 %
 585 %      size_t RegisterPALMImage(void)
 586 %
 587 */
 588 ModuleExport size_t RegisterPALMImage(void)
 589 {
 590   MagickInfo
 591     *entry;
 592
 593   entry=SetMagickInfo("PALM");
 594   entry->decoder=(DecodeImageHandler *) ReadPALMImage;
 595   entry->encoder=(EncodeImageHandler *) WritePALMImage;
 596   entry->seekable_stream=MagickTrue;
 597   entry->description=ConstantString("Palm pixmap");
 598   entry->module=ConstantString("PALM");
 599   (void) RegisterMagickInfo(entry);
 600   return(MagickImageCoderSignature);
 601 }
 602 \f
 603 /*
 604 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 605 %                                                                             %
 606 %                                                                             %
 607 %                                                                             %
 608 %   U n r e g i s t e r P A L M I m a g e                                     %
 609 %                                                                             %
 610 %                                                                             %
 611 %                                                                             %
 612 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 613 %
 614 %  UnregisterPALMImage() removes format registrations made by the PALM
 615 %  module from the list of supported formats.
 616 %
 617 %  The format of the UnregisterPALMImage method is:
 618 %
 619 %      UnregisterPALMImage(void)
 620 %
 621 */
 622 ModuleExport void UnregisterPALMImage(void)
 623 {
 624   (void) UnregisterMagickInfo("PALM");
 625 }
 626 \f
 627 /*
 628 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 629 %                                                                             %
 630 %                                                                             %
 631 %                                                                             %
 632 %   W r i t e P A L M I m a g e                                               %
 633 %                                                                             %
 634 %                                                                             %
 635 %                                                                             %
 636 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 637 %
 638 %  WritePALMImage() writes an image of raw bits in LSB order to a file.
 639 %
 640 %  The format of the WritePALMImage method is:
 641 %
 642 %      MagickBooleanType WritePALMImage(const ImageInfo *image_info,
 643 %        Image *image)
 644 %
 645 %  A description of each parameter follows.
 646 %
 647 %    o image_info: Specifies a pointer to an ImageInfo structure.
 648 %
 649 %    o image:  A pointer to a Image structure.
 650 %
 651 */
 652 static MagickBooleanType WritePALMImage(const ImageInfo *image_info,
 653   Image *image)
 654 {
 655   int
 656     y;
 657
 658   ExceptionInfo
 659     exception;
 660
 661   MagickBooleanType
 662     status;
 663
 664   MagickOffsetType
 665     currentOffset,
 666     offset,
 667     scene;
 668
 669   MagickSizeType
 670     cc;
 671
 672   PixelPacket
 673     transpix;
 674
 675   QuantizeInfo
 676     *quantize_info;
 677
 678   register IndexPacket
 679     *indexes;
 680
 681   register ssize_t
 682     x;
 683
 684   register PixelPacket
 685     *p;
 686
 687   unsigned char
 688     bit,
 689     byte,
 690     color,
 691     *lastrow,
 692     *one_row,
 693     *ptr,
 694     version;
 695
 696   unsigned int
 697     transparentIndex;
 698
 699   size_t
 700     count,
 701     bits_per_pixel,
 702     bytes_per_row,
 703     nextDepthOffset,
 704     one;
 705
 706   unsigned short
 707     color16,
 708     flags;
 709
 710
 711   /*
 712     Open output image file.
 713   */
 714   assert(image_info != (const ImageInfo *) NULL);
 715   assert(image_info->signature == MagickSignature);
 716   assert(image != (Image *) NULL);
 717   assert(image->signature == MagickSignature);
 718   if (image->debug != MagickFalse)
 719     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
 720   status=OpenBlob(image_info,image,WriteBinaryBlobMode,&exception);
 721   if (status == MagickFalse)
 722     return(status);
 723   GetExceptionInfo(&exception);
 724   quantize_info=AcquireQuantizeInfo(image_info);
 725   flags=0;
 726   currentOffset=0;
 727   transparentIndex=0;
 728   transpix.red=0;
 729   transpix.green=0;
 730   transpix.blue=0;
 731   transpix.opacity=0;
 732   one=1;
 733   version=0;
 734   scene=0;
 735   do
 736   {
 737     if (image->colorspace != RGBColorspace)
 738       (void) TransformImageColorspace(image,RGBColorspace);
 739     count=GetNumberColors(image,NULL,&exception);
 740     for (bits_per_pixel=1;  (one << bits_per_pixel) < count; bits_per_pixel*=2) ;
 741     if (image_info->depth > 100)
 742       bits_per_pixel=image_info->depth-100;
 743     if (bits_per_pixel < 16)
 744       (void) TransformImageColorspace(image,image->colorspace);
 745     if (bits_per_pixel < 8)
 746       {
 747         (void) TransformImageColorspace(image,GRAYColorspace);
 748         (void) SetImageType(image,PaletteType);
 749         (void) SortColormapByIntensity(image);
 750       }
 751     if ((image->storage_class == PseudoClass) && (image->colors > 256))
 752       (void) SetImageStorageClass(image,DirectClass);
 753     if (image->storage_class == PseudoClass)
 754       flags|=PALM_HAS_COLORMAP_FLAG;
 755     else
 756       flags|=PALM_IS_DIRECT_COLOR;
 757     (void) WriteBlobMSBShort(image,(unsigned short) image->columns); /* width */
 758     (void) WriteBlobMSBShort(image,(unsigned short) image->rows);  /* height */
 759     bytes_per_row=((image->columns+(16/bits_per_pixel-1))/(16/
 760       bits_per_pixel))*2;
 761     (void) WriteBlobMSBShort(image,(unsigned short) bytes_per_row);
 762     if ((image_info->compression == RLECompression) ||
 763         (image_info->compression == FaxCompression))
 764       flags|=PALM_IS_COMPRESSED_FLAG;
 765     (void) WriteBlobMSBShort(image, flags);
 766     (void) WriteBlobByte(image,(unsigned char) bits_per_pixel);
 767     if (bits_per_pixel > 1)
 768       version=1;
 769     if ((image_info->compression == RLECompression) ||
 770         (image_info->compression == FaxCompression))
 771       version=2;
 772     (void) WriteBlobByte(image,version);
 773     (void) WriteBlobMSBShort(image,0);  /* nextDepthOffset */
 774     (void) WriteBlobByte(image,(unsigned char) transparentIndex);
 775     if (image_info->compression == RLECompression)
 776       (void) WriteBlobByte(image,PALM_COMPRESSION_RLE);
 777     else
 778       if (image_info->compression == FaxCompression)
 779         (void) WriteBlobByte(image,PALM_COMPRESSION_SCANLINE);
 780       else
 781         (void) WriteBlobByte(image,PALM_COMPRESSION_NONE);
 782     (void) WriteBlobMSBShort(image,0);  /* reserved */
 783     offset=16;
 784     if (bits_per_pixel == 16)
 785       {
 786         (void) WriteBlobByte(image,5);  /* # of bits of red */
 787         (void) WriteBlobByte(image,6);  /* # of bits of green */
 788         (void) WriteBlobByte(image,5);  /* # of bits of blue */
 789         (void) WriteBlobByte(image,0);  /* reserved by Palm */
 790         (void) WriteBlobMSBLong(image,0);  /* no transparent color, YET */
 791         offset+=8;
 792       }
 793     if (bits_per_pixel == 8)
 794       {
 795         if (flags & PALM_HAS_COLORMAP_FLAG)  /* Write out colormap */
 796           {
 797             quantize_info->dither=IsPaletteImage(image,&image->exception);
 798             quantize_info->number_colors=image->colors;
 799             (void) QuantizeImage(quantize_info,image);
 800             (void) WriteBlobMSBShort(image,(unsigned short) image->colors);
 801             for (count = 0; count < image->colors; count++)
 802             {
 803               (void) WriteBlobByte(image,(unsigned char) count);
 804               (void) WriteBlobByte(image,ScaleQuantumToChar(
 805                 image->colormap[count].red));
 806               (void) WriteBlobByte(image,
 807                 ScaleQuantumToChar(image->colormap[count].green));
 808               (void) WriteBlobByte(image,
 809                 ScaleQuantumToChar(image->colormap[count].blue));
 810             }
 811             offset+=2+count*4;
 812           }
 813       else  /* Map colors to Palm standard colormap */
 814         {
 815           Image
 816             *affinity_image;
 817
 818           affinity_image=ConstituteImage(256,1,"RGB",CharPixel,&PalmPalette,
 819             &exception);
 820           (void) TransformImageColorspace(affinity_image,affinity_image->colorspace);
 821           (void) RemapImage(quantize_info,image,affinity_image);
 822           for (y=0; y < (ssize_t) image->rows; y++)
 823           {
 824             p=GetAuthenticPixels(image,0,y,image->columns,1,&exception);
 825             indexes=GetAuthenticIndexQueue(image);
 826             for (x=0; x < (ssize_t) image->columns; x++)
 827               indexes[x]=(IndexPacket) FindColor(&image->colormap[(ssize_t)
 828                 indexes[x]]);
 829           }
 830           affinity_image=DestroyImage(affinity_image);
 831         }
 832       }
 833     if (flags & PALM_IS_COMPRESSED_FLAG)
 834       (void) WriteBlobMSBShort(image,0);  /* fill in size later */
 835     lastrow=(unsigned char *) NULL;
 836     if (image_info->compression == FaxCompression)
 837       lastrow=(unsigned char *) AcquireQuantumMemory(bytes_per_row,
 838         sizeof(*lastrow));
 839       /* TODO check whether memory really was acquired? */
 840     one_row=(unsigned char *) AcquireQuantumMemory(bytes_per_row,
 841       sizeof(*one_row));
 842     if (one_row == (unsigned char *) NULL)
 843       ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
 844     for (y=0; y < (int) image->rows; y++)
 845     {
 846       ptr=one_row;
 847       (void) ResetMagickMemory(ptr,0,bytes_per_row);
 848       p=GetAuthenticPixels(image,0,y,image->columns,1,&exception);
 849       if (p == (PixelPacket *) NULL)
 850         break;
 851       indexes=GetAuthenticIndexQueue(image);
 852       if (bits_per_pixel == 16)
 853         {
 854           for (x=0; x < (int) image->columns; x++)
 855           {
 856             color16=(unsigned short) ((((31*(size_t) GetRedPixelComponent(p))/
 857               (size_t) QuantumRange) << 11) |
 858               (((63*(size_t) GetGreenPixelComponent(p))/(size_t) QuantumRange) << 5) |
 859               ((31*(size_t) GetBluePixelComponent(p))/(size_t) QuantumRange));
 860             if (p->opacity == (Quantum) TransparentOpacity)
 861               {
 862                 transpix.red=GetRedPixelComponent(p);
 863                 transpix.green=GetGreenPixelComponent(p);
 864                 transpix.blue=GetBluePixelComponent(p);
 865                 transpix.opacity=GetOpacityPixelComponent(p);
 866                 flags|=PALM_HAS_TRANSPARENCY_FLAG;
 867               }
 868             *ptr++=(unsigned char) ((color16 >> 8) & 0xff);
 869             *ptr++=(unsigned char) (color16 & 0xff);
 870             p++;
 871           }
 872         }
 873       else
 874         {
 875           byte=0x00;
 876           bit=(unsigned char) (8-bits_per_pixel);
 877           for (x=0; x < (int) image->columns; x++)
 878           {
 879             if (bits_per_pixel >= 8)
 880               color=(unsigned char) indexes[x];
 881             else
 882               color=(unsigned char) (indexes[x]*((one << bits_per_pixel)-1)/
 883                 MagickMax(1*image->colors-1,1));
 884             byte|=color << bit;
 885             if (bit != 0)
 886               bit-=(ssize_t) bits_per_pixel;
 887             else
 888               {
 889                 *ptr++=byte;
 890                 byte=0x00;
 891                 bit=(unsigned char) (8-bits_per_pixel);
 892               }
 893           }
 894           if ((image->columns % (8/bits_per_pixel)) != 0)
 895             *ptr++=byte;
 896         }
 897       if (image_info->compression == RLECompression)
 898         {
 899           x=0;
 900           while (x < (ssize_t) bytes_per_row)
 901           {
 902             byte=one_row[x];
 903             count=1;
 904             while ((one_row[++x] == byte) && (count < 255) &&
 905                    (x < (ssize_t) bytes_per_row))
 906               count++;
 907             (void) WriteBlobByte(image,(unsigned char) count);
 908             (void) WriteBlobByte(image,(unsigned char) byte);
 909           }
 910         }
 911       else
 912         if (image_info->compression == FaxCompression)
 913           {
 914             char
 915               tmpbuf[8],
 916               *tptr;
 917
 918             for (x = 0;  x < (ssize_t) bytes_per_row;  x += 8)
 919             {
 920               tptr = tmpbuf;
 921               for (bit=0, byte=0; bit < (unsigned char) MagickMin(8,(ssize_t) bytes_per_row-x); bit++)
 922               {
 923                 if ((y == 0) || (lastrow[x + bit] != one_row[x + bit]))
 924                   {
 925                   byte |= (1 << (7 - bit));
 926                   *tptr++ = (char) one_row[x + bit];
 927                 }
 928               }
 929               (void) WriteBlobByte(image, byte);
 930               (void) WriteBlob(image,tptr-tmpbuf,(unsigned char *) tmpbuf);
 931             }
 932             (void) CopyMagickMemory(lastrow,one_row,bytes_per_row);
 933           }
 934         else
 935           (void) WriteBlob(image,bytes_per_row,one_row);
 936       }
 937     if (flags & PALM_HAS_TRANSPARENCY_FLAG)
 938       {
 939         offset=SeekBlob(image,currentOffset+6,SEEK_SET);
 940         (void) WriteBlobMSBShort(image,flags);
 941         offset=SeekBlob(image,currentOffset+12,SEEK_SET);
 942         (void) WriteBlobByte(image,(unsigned char) transparentIndex);  /* trans index */
 943       }
 944     if (bits_per_pixel == 16)
 945       {
 946         offset=SeekBlob(image,currentOffset+20,SEEK_SET);
 947         (void) WriteBlobByte(image,0);  /* reserved by Palm */
 948         (void) WriteBlobByte(image,(unsigned char) ((31*transpix.red)/QuantumRange));
 949         (void) WriteBlobByte(image,(unsigned char) ((63*transpix.green)/QuantumRange));
 950         (void) WriteBlobByte(image,(unsigned char) ((31*transpix.blue)/QuantumRange));
 951       }
 952     if (flags & PALM_IS_COMPRESSED_FLAG)  /* fill in size now */
 953       {
 954         offset=SeekBlob(image,currentOffset+offset,SEEK_SET);
 955         (void) WriteBlobMSBShort(image,(unsigned short) (GetBlobSize(image)-
 956           currentOffset-offset));
 957       }
 958     if (one_row != (unsigned char *) NULL)
 959       one_row=(unsigned char *) RelinquishMagickMemory(one_row);
 960     if (lastrow != (unsigned char *) NULL)
 961       lastrow=(unsigned char *) RelinquishMagickMemory(lastrow);
 962     if (GetNextImageInList(image) == (Image *) NULL)
 963       break;
 964     /* padding to 4 byte word */
 965     for (cc = (GetBlobSize(image))%4; cc > 0; cc--)
 966     {
 967       (void) WriteBlobByte(image,0);
 968     }
 969     /* write nextDepthOffset and return to end of image */
 970     offset=SeekBlob(image,currentOffset+10,SEEK_SET);
 971     nextDepthOffset=(size_t) ((GetBlobSize(image)-currentOffset)/4);
 972     (void) WriteBlobMSBShort(image,(unsigned short) nextDepthOffset);
 973     currentOffset=(MagickOffsetType) GetBlobSize(image);
 974     offset=SeekBlob(image,currentOffset,SEEK_SET);
 975     image=SyncNextImageInList(image);
 976     status=SetImageProgress(image,SaveImagesTag,scene++,
 977       GetImageListLength(image));
 978     if (status == MagickFalse)
 979       break;
 980   } while (image_info->adjoin != MagickFalse);
 981   quantize_info=DestroyQuantizeInfo(quantize_info);
 982   (void) CloseBlob(image);
 983   (void) DestroyExceptionInfo(&exception);
 984   return(MagickTrue);
 985 }