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

   1 /*
   2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   3 %                                                                             %
   4 %                                                                             %
   5 %                                                                             %
   6 %                            SSSSS  U   U  N   N                              %
   7 %                            SS     U   U  NN  N                              %
   8 %                             SSS   U   U  N N N                              %
   9 %                               SS  U   U  N  NN                              %
  10 %                            SSSSS   UUU   N   N                              %
  11 %                                                                             %
  12 %                                                                             %
  13 %                    Read/Write Sun Rasterfile Image Format                   %
  14 %                                                                             %
  15 %                              Software Design                                %
  16 %                                John Cristy                                  %
  17 %                                 July 1992                                   %
  18 %                                                                             %
  19 %                                                                             %
  20 %  Copyright 1999-2010 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 "magick/studio.h"
  43 #include "magick/blob.h"
  44 #include "magick/blob-private.h"
  45 #include "magick/cache.h"
  46 #include "magick/color.h"
  47 #include "magick/color-private.h"
  48 #include "magick/colormap.h"
  49 #include "magick/colorspace.h"
  50 #include "magick/exception.h"
  51 #include "magick/exception-private.h"
  52 #include "magick/image.h"
  53 #include "magick/image-private.h"
  54 #include "magick/list.h"
  55 #include "magick/magick.h"
  56 #include "magick/memory_.h"
  57 #include "magick/monitor.h"
  58 #include "magick/monitor-private.h"
  59 #include "magick/quantum-private.h"
  60 #include "magick/static.h"
  61 #include "magick/string_.h"
  62 #include "magick/module.h"
  63 \f
  64 /*
  65   Forward declarations.
  66 */
  67 static MagickBooleanType
  68   WriteSUNImage(const ImageInfo *,Image *);
  69 \f
  70 /*
  71 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  72 %                                                                             %
  73 %                                                                             %
  74 %                                                                             %
  75 %   I s S U N                                                                 %
  76 %                                                                             %
  77 %                                                                             %
  78 %                                                                             %
  79 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  80 %
  81 %  IsSUN() returns MagickTrue if the image format type, identified by the
  82 %  magick string, is SUN.
  83 %
  84 %  The format of the IsSUN method is:
  85 %
  86 %      MagickBooleanType IsSUN(const unsigned char *magick,const size_t length)
  87 %
  88 %  A description of each parameter follows:
  89 %
  90 %    o magick: compare image format pattern against these bytes.
  91 %
  92 %    o length: Specifies the length of the magick string.
  93 %
  94 */
  95 static MagickBooleanType IsSUN(const unsigned char *magick,const size_t length)
  96 {
  97   if (length < 4)
  98     return(MagickFalse);
  99   if (memcmp(magick,"\131\246\152\225",4) == 0)
 100     return(MagickTrue);
 101   return(MagickFalse);
 102 }
 103 \f
 104 /*
 105 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 106 %                                                                             %
 107 %                                                                             %
 108 %                                                                             %
 109 %   D e c o d e I m a g e                                                     %
 110 %                                                                             %
 111 %                                                                             %
 112 %                                                                             %
 113 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 114 %
 115 %  DecodeImage unpacks the packed image pixels into  runlength-encoded pixel
 116 %  packets.
 117 %
 118 %  The format of the DecodeImage method is:
 119 %
 120 %      MagickBooleanType DecodeImage(const unsigned char *compressed_pixels,
 121 %        const size_t length,unsigned char *pixels)
 122 %
 123 %  A description of each parameter follows:
 124 %
 125 %    o compressed_pixels:  The address of a byte (8 bits) array of compressed
 126 %      pixel data.
 127 %
 128 %    o length:  An integer value that is the total number of bytes of the
 129 %      source image (as just read by ReadBlob)
 130 %
 131 %    o pixels:  The address of a byte (8 bits) array of pixel data created by
 132 %      the uncompression process.  The number of bytes in this array
 133 %      must be at least equal to the number columns times the number of rows
 134 %      of the source pixels.
 135 %
 136 */
 137 static MagickBooleanType DecodeImage(const unsigned char *compressed_pixels,
 138   const size_t length,unsigned char *pixels,size_t maxpixels)
 139 {
 140   register const unsigned char
 141     *p, *l;
 142
 143   register unsigned char
 144     *q;
 145
 146   ssize_t
 147     count;
 148
 149   unsigned char
 150     byte;
 151
 152   (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
 153   assert(compressed_pixels != (unsigned char *) NULL);
 154   assert(pixels != (unsigned char *) NULL);
 155   p=compressed_pixels;
 156   q=pixels;
 157   l=q+maxpixels;
 158   while (((size_t) (p-compressed_pixels) < length) && (q < l))
 159   {
 160     byte=(*p++);
 161     if (byte != 128U)
 162       *q++=byte;
 163     else
 164       {
 165         /*
 166           Runlength-encoded packet: <count><byte>
 167         */
 168         count=(ssize_t) (*p++);
 169         if (count > 0)
 170           byte=(*p++);
 171         while ((count >= 0) && (q < l))
 172         {
 173           *q++=byte;
 174           count--;
 175         }
 176      }
 177   }
 178   return(MagickTrue);
 179 }
 180 \f
 181 /*
 182 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 183 %                                                                             %
 184 %                                                                             %
 185 %                                                                             %
 186 %   R e a d S U N I m a g e                                                   %
 187 %                                                                             %
 188 %                                                                             %
 189 %                                                                             %
 190 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 191 %
 192 %  ReadSUNImage() reads a SUN image file and returns it.  It allocates
 193 %  the memory necessary for the new Image structure and returns a pointer to
 194 %  the new image.
 195 %
 196 %  The format of the ReadSUNImage method is:
 197 %
 198 %      Image *ReadSUNImage(const ImageInfo *image_info,ExceptionInfo *exception)
 199 %
 200 %  A description of each parameter follows:
 201 %
 202 %    o image_info: the image info.
 203 %
 204 %    o exception: return any errors or warnings in this structure.
 205 %
 206 */
 207 static Image *ReadSUNImage(const ImageInfo *image_info,ExceptionInfo *exception)
 208 {
 209 #define RMT_EQUAL_RGB  1
 210 #define RMT_NONE  0
 211 #define RMT_RAW  2
 212 #define RT_STANDARD  1
 213 #define RT_ENCODED  2
 214 #define RT_FORMAT_RGB  3
 215
 216   typedef struct _SUNInfo
 217   {
 218     unsigned int
 219       magic,
 220       width,
 221       height,
 222       depth,
 223       length,
 224       type,
 225       maptype,
 226       maplength;
 227   } SUNInfo;
 228
 229   Image
 230     *image;
 231
 232   int
 233     bit;
 234
 235   long
 236     y;
 237
 238   MagickBooleanType
 239     status;
 240
 241   MagickSizeType
 242     number_pixels;
 243
 244   register IndexPacket
 245     *indexes;
 246
 247   register long
 248     x;
 249
 250   register PixelPacket
 251     *q;
 252
 253   register long
 254     i;
 255
 256   register unsigned char
 257     *p;
 258
 259   size_t
 260     length;
 261
 262   ssize_t
 263     count;
 264
 265   SUNInfo
 266     sun_info;
 267
 268   unsigned char
 269     *sun_data,
 270     *sun_pixels;
 271
 272   unsigned int
 273     bytes_per_line;
 274
 275   /*
 276     Open image file.
 277   */
 278   assert(image_info != (const ImageInfo *) NULL);
 279   assert(image_info->signature == MagickSignature);
 280   if (image_info->debug != MagickFalse)
 281     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
 282       image_info->filename);
 283   assert(exception != (ExceptionInfo *) NULL);
 284   assert(exception->signature == MagickSignature);
 285   image=AcquireImage(image_info);
 286   status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
 287   if (status == MagickFalse)
 288     {
 289       image=DestroyImageList(image);
 290       return((Image *) NULL);
 291     }
 292   /*
 293     Read SUN raster header.
 294   */
 295   (void) ResetMagickMemory(&sun_info,0,sizeof(sun_info));
 296   sun_info.magic=ReadBlobMSBLong(image);
 297   do
 298   {
 299     /*
 300       Verify SUN identifier.
 301     */
 302     if (sun_info.magic != 0x59a66a95)
 303       ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 304     sun_info.width=ReadBlobMSBLong(image);
 305     sun_info.height=ReadBlobMSBLong(image);
 306     sun_info.depth=ReadBlobMSBLong(image);
 307     sun_info.length=ReadBlobMSBLong(image);
 308     sun_info.type=ReadBlobMSBLong(image);
 309     sun_info.maptype=ReadBlobMSBLong(image);
 310     sun_info.maplength=ReadBlobMSBLong(image);
 311     image->columns=sun_info.width;
 312     image->rows=sun_info.height;
 313     if ((sun_info.depth == 0) || (sun_info.depth > 32))
 314       ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 315     image->depth=sun_info.depth <= 8 ? sun_info.depth :
 316       MAGICKCORE_QUANTUM_DEPTH;
 317     if (sun_info.depth < 24)
 318       {
 319         image->storage_class=PseudoClass;
 320         image->colors=sun_info.maplength;
 321         if (sun_info.maptype == RMT_NONE)
 322           image->colors=1 << sun_info.depth;
 323         if (sun_info.maptype == RMT_EQUAL_RGB)
 324           image->colors=sun_info.maplength/3;
 325       }
 326     switch (sun_info.maptype)
 327     {
 328       case RMT_NONE:
 329       {
 330         if (sun_info.depth < 24)
 331           {
 332             /*
 333               Create linear color ramp.
 334             */
 335             if (AcquireImageColormap(image,image->colors) == MagickFalse)
 336               ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 337           }
 338         break;
 339       }
 340       case RMT_EQUAL_RGB:
 341       {
 342         unsigned char
 343           *sun_colormap;
 344
 345         /*
 346           Read SUN raster colormap.
 347         */
 348         if (AcquireImageColormap(image,image->colors) == MagickFalse)
 349           ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 350         sun_colormap=(unsigned char *) AcquireQuantumMemory(image->colors,
 351           sizeof(*sun_colormap));
 352         if (sun_colormap == (unsigned char *) NULL)
 353           ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 354         count=ReadBlob(image,image->colors,sun_colormap);
 355         for (i=0; i < (long) image->colors; i++)
 356           image->colormap[i].red=ScaleCharToQuantum(sun_colormap[i]);
 357         count=ReadBlob(image,image->colors,sun_colormap);
 358         for (i=0; i < (long) image->colors; i++)
 359           image->colormap[i].green=ScaleCharToQuantum(sun_colormap[i]);
 360         count=ReadBlob(image,image->colors,sun_colormap);
 361         for (i=0; i < (long) image->colors; i++)
 362           image->colormap[i].blue=ScaleCharToQuantum(sun_colormap[i]);
 363         sun_colormap=(unsigned char *) RelinquishMagickMemory(sun_colormap);
 364         break;
 365       }
 366       case RMT_RAW:
 367       {
 368         unsigned char
 369           *sun_colormap;
 370
 371         /*
 372           Read SUN raster colormap.
 373         */
 374         sun_colormap=(unsigned char *) AcquireQuantumMemory(sun_info.maplength,
 375           sizeof(*sun_colormap));
 376         if (sun_colormap == (unsigned char *) NULL)
 377           ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 378         count=ReadBlob(image,sun_info.maplength,sun_colormap);
 379         sun_colormap=(unsigned char *) RelinquishMagickMemory(sun_colormap);
 380         break;
 381       }
 382       default:
 383         ThrowReaderException(CoderError,"ColormapTypeNotSupported");
 384     }
 385     image->matte=sun_info.depth == 32 ? MagickTrue : MagickFalse;
 386     image->columns=sun_info.width;
 387     image->rows=sun_info.height;
 388     if (image_info->ping != MagickFalse)
 389       {
 390         (void) CloseBlob(image);
 391         return(GetFirstImageInList(image));
 392       }
 393     if ((sun_info.length*sizeof(*sun_data))/sizeof(*sun_data) !=
 394         sun_info.length || !sun_info.length)
 395       ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 396     number_pixels=(MagickSizeType) image->columns*image->rows;
 397     if ((sun_info.depth >= 8) &&
 398         ((number_pixels*((sun_info.depth+7)/8)) > sun_info.length))
 399       ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 400     sun_data=(unsigned char *) AcquireQuantumMemory((size_t) sun_info.length,
 401       sizeof(*sun_data));
 402     if (sun_data == (unsigned char *) NULL)
 403       ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 404     count=(ssize_t) ReadBlob(image,sun_info.length,sun_data);
 405     if ((count == 0) && (sun_info.type != RT_ENCODED))
 406       ThrowReaderException(CorruptImageError,"UnableToReadImageData");
 407     sun_pixels=sun_data;
 408     bytes_per_line=0;
 409     if (sun_info.type == RT_ENCODED)
 410       {
 411         unsigned long
 412           height;
 413
 414         /*
 415           Read run-length encoded raster pixels.
 416         */
 417         height=sun_info.height;
 418         bytes_per_line=sun_info.width*sun_info.depth;
 419         if ((height == 0) || (sun_info.width == 0) || (sun_info.depth == 0) ||
 420             ((bytes_per_line/sun_info.depth) != sun_info.width))
 421           ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 422         bytes_per_line+=15;
 423         bytes_per_line<<=1;
 424         if ((bytes_per_line >> 1) != (sun_info.width*sun_info.depth+15))
 425           ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 426         bytes_per_line>>=4;
 427         sun_pixels=(unsigned char *) AcquireQuantumMemory(height,
 428           bytes_per_line*sizeof(*sun_pixels));
 429         if (sun_pixels == (unsigned char *) NULL)
 430           ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 431         (void) DecodeImage(sun_data,sun_info.length,sun_pixels,
 432           bytes_per_line*height);
 433         sun_data=(unsigned char *) RelinquishMagickMemory(sun_data);
 434       }
 435     /*
 436       Convert SUN raster image to pixel packets.
 437     */
 438     p=sun_pixels;
 439     if (sun_info.depth == 1)
 440       for (y=0; y < (long) image->rows; y++)
 441       {
 442         q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 443         if (q == (PixelPacket *) NULL)
 444           break;
 445         indexes=GetAuthenticIndexQueue(image);
 446         for (x=0; x < ((long) image->columns-7); x+=8)
 447         {
 448           for (bit=7; bit >= 0; bit--)
 449             indexes[x+7-bit]=(IndexPacket) ((*p) & (0x01 << bit) ? 0x00 : 0x01);
 450           p++;
 451         }
 452         if ((image->columns % 8) != 0)
 453           {
 454             for (bit=7; bit >= (long) (8-(image->columns % 8)); bit--)
 455               indexes[x+7-bit]=(IndexPacket)
 456                 ((*p) & (0x01 << bit) ? 0x00 : 0x01);
 457             p++;
 458           }
 459         if ((((image->columns/8)+(image->columns % 8 ? 1 : 0)) % 2) != 0)
 460           p++;
 461         if (SyncAuthenticPixels(image,exception) == MagickFalse)
 462           break;
 463         if (image->previous == (Image *) NULL)
 464           {
 465             status=SetImageProgress(image,LoadImageTag,y,image->rows);
 466             if (status == MagickFalse)
 467               break;
 468           }
 469       }
 470     else
 471       if (image->storage_class == PseudoClass)
 472         {
 473           length=image->rows*(image->columns+image->columns % 2);
 474           if (((sun_info.type == RT_ENCODED) &&
 475                (length > (bytes_per_line*image->rows))) ||
 476               ((sun_info.type != RT_ENCODED) && (length > sun_info.length)))
 477             ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 478           for (y=0; y < (long) image->rows; y++)
 479           {
 480             q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 481             if (q == (PixelPacket *) NULL)
 482               break;
 483             indexes=GetAuthenticIndexQueue(image);
 484             for (x=0; x < (long) image->columns; x++)
 485               indexes[x]=(IndexPacket) (*p++);
 486             if ((image->columns % 2) != 0)
 487               p++;
 488             if (SyncAuthenticPixels(image,exception) == MagickFalse)
 489               break;
 490             if (image->previous == (Image *) NULL)
 491               {
 492                 status=SetImageProgress(image,LoadImageTag,y,image->rows);
 493                 if (status == MagickFalse)
 494                   break;
 495               }
 496           }
 497         }
 498       else
 499         {
 500           size_t
 501             bytes_per_pixel;
 502
 503           bytes_per_pixel=3;
 504           if (image->matte != MagickFalse)
 505             bytes_per_pixel++;
 506           length=image->rows*((bytes_per_line*image->columns)+
 507             image->columns % 2);
 508           if (((sun_info.type == RT_ENCODED) &&
 509                (length > (bytes_per_line*image->rows))) ||
 510               ((sun_info.type != RT_ENCODED) && (length > sun_info.length)))
 511             ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 512           for (y=0; y < (long) image->rows; y++)
 513           {
 514             q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 515             if (q == (PixelPacket *) NULL)
 516               break;
 517             for (x=0; x < (long) image->columns; x++)
 518             {
 519               if (image->matte != MagickFalse)
 520                 q->opacity=(Quantum) (QuantumRange-ScaleCharToQuantum(*p++));
 521               if (sun_info.type == RT_STANDARD)
 522                 {
 523                   q->blue=ScaleCharToQuantum(*p++);
 524                   q->green=ScaleCharToQuantum(*p++);
 525                   q->red=ScaleCharToQuantum(*p++);
 526                 }
 527               else
 528                 {
 529                   q->red=ScaleCharToQuantum(*p++);
 530                   q->green=ScaleCharToQuantum(*p++);
 531                   q->blue=ScaleCharToQuantum(*p++);
 532                 }
 533               if (image->colors != 0)
 534                 {
 535                   q->red=image->colormap[(long) q->red].red;
 536                   q->green=image->colormap[(long) q->green].green;
 537                   q->blue=image->colormap[(long) q->blue].blue;
 538                 }
 539               q++;
 540             }
 541             if (((bytes_per_pixel*image->columns) % 2) != 0)
 542               p++;
 543             if (SyncAuthenticPixels(image,exception) == MagickFalse)
 544               break;
 545             if (image->previous == (Image *) NULL)
 546               {
 547                 status=SetImageProgress(image,LoadImageTag,y,image->rows);
 548                 if (status == MagickFalse)
 549                   break;
 550               }
 551           }
 552         }
 553     if (image->storage_class == PseudoClass)
 554       (void) SyncImage(image);
 555     sun_pixels=(unsigned char *) RelinquishMagickMemory(sun_pixels);
 556     if (EOFBlob(image) != MagickFalse)
 557       {
 558         ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
 559           image->filename);
 560         break;
 561       }
 562     /*
 563       Proceed to next image.
 564     */
 565     if (image_info->number_scenes != 0)
 566       if (image->scene >= (image_info->scene+image_info->number_scenes-1))
 567         break;
 568     sun_info.magic=ReadBlobMSBLong(image);
 569     if (sun_info.magic == 0x59a66a95)
 570       {
 571         /*
 572           Allocate next image structure.
 573         */
 574         AcquireNextImage(image_info,image);
 575         if (GetNextImageInList(image) == (Image *) NULL)
 576           {
 577             image=DestroyImageList(image);
 578             return((Image *) NULL);
 579           }
 580         image=SyncNextImageInList(image);
 581         status=SetImageProgress(image,LoadImagesTag,TellBlob(image),
 582           GetBlobSize(image));
 583         if (status == MagickFalse)
 584           break;
 585       }
 586   } while (sun_info.magic == 0x59a66a95);
 587   (void) CloseBlob(image);
 588   return(GetFirstImageInList(image));
 589 }
 590 \f
 591 /*
 592 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 593 %                                                                             %
 594 %                                                                             %
 595 %                                                                             %
 596 %   R e g i s t e r S U N I m a g e                                           %
 597 %                                                                             %
 598 %                                                                             %
 599 %                                                                             %
 600 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 601 %
 602 %  RegisterSUNImage() adds attributes for the SUN image format to
 603 %  the list of supported formats.  The attributes include the image format
 604 %  tag, a method to read and/or write the format, whether the format
 605 %  supports the saving of more than one frame to the same file or blob,
 606 %  whether the format supports native in-memory I/O, and a brief
 607 %  description of the format.
 608 %
 609 %  The format of the RegisterSUNImage method is:
 610 %
 611 %      unsigned long RegisterSUNImage(void)
 612 %
 613 */
 614 ModuleExport unsigned long RegisterSUNImage(void)
 615 {
 616   MagickInfo
 617     *entry;
 618
 619   entry=SetMagickInfo("RAS");
 620   entry->decoder=(DecodeImageHandler *) ReadSUNImage;
 621   entry->encoder=(EncodeImageHandler *) WriteSUNImage;
 622   entry->magick=(IsImageFormatHandler *) IsSUN;
 623   entry->description=ConstantString("SUN Rasterfile");
 624   entry->module=ConstantString("SUN");
 625   (void) RegisterMagickInfo(entry);
 626   entry=SetMagickInfo("SUN");
 627   entry->decoder=(DecodeImageHandler *) ReadSUNImage;
 628   entry->encoder=(EncodeImageHandler *) WriteSUNImage;
 629   entry->description=ConstantString("SUN Rasterfile");
 630   entry->module=ConstantString("SUN");
 631   (void) RegisterMagickInfo(entry);
 632   return(MagickImageCoderSignature);
 633 }
 634 \f
 635 /*
 636 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 637 %                                                                             %
 638 %                                                                             %
 639 %                                                                             %
 640 %   U n r e g i s t e r S U N I m a g e                                       %
 641 %                                                                             %
 642 %                                                                             %
 643 %                                                                             %
 644 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 645 %
 646 %  UnregisterSUNImage() removes format registrations made by the
 647 %  SUN module from the list of supported formats.
 648 %
 649 %  The format of the UnregisterSUNImage method is:
 650 %
 651 %      UnregisterSUNImage(void)
 652 %
 653 */
 654 ModuleExport void UnregisterSUNImage(void)
 655 {
 656   (void) UnregisterMagickInfo("RAS");
 657   (void) UnregisterMagickInfo("SUN");
 658 }
 659 \f
 660 /*
 661 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 662 %                                                                             %
 663 %                                                                             %
 664 %                                                                             %
 665 %   W r i t e S U N I m a g e                                                 %
 666 %                                                                             %
 667 %                                                                             %
 668 %                                                                             %
 669 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 670 %
 671 %  WriteSUNImage() writes an image in the SUN rasterfile format.
 672 %
 673 %  The format of the WriteSUNImage method is:
 674 %
 675 %      MagickBooleanType WriteSUNImage(const ImageInfo *image_info,Image *image)
 676 %
 677 %  A description of each parameter follows.
 678 %
 679 %    o image_info: the image info.
 680 %
 681 %    o image:  The image.
 682 %
 683 */
 684 static MagickBooleanType WriteSUNImage(const ImageInfo *image_info,Image *image)
 685 {
 686 #define RMT_EQUAL_RGB  1
 687 #define RMT_NONE  0
 688 #define RMT_RAW  2
 689 #define RT_STANDARD  1
 690 #define RT_FORMAT_RGB  3
 691
 692   typedef struct _SUNInfo
 693   {
 694     unsigned int
 695       magic,
 696       width,
 697       height,
 698       depth,
 699       length,
 700       type,
 701       maptype,
 702       maplength;
 703   } SUNInfo;
 704
 705   long
 706     y;
 707
 708   MagickBooleanType
 709     status;
 710
 711   MagickOffsetType
 712     scene;
 713
 714   MagickSizeType
 715     number_pixels;
 716
 717   register const IndexPacket
 718     *indexes;
 719
 720   register const PixelPacket
 721     *p;
 722
 723   register long
 724     x;
 725
 726   register long
 727     i;
 728
 729   SUNInfo
 730     sun_info;
 731
 732   /*
 733     Open output image file.
 734   */
 735   assert(image_info != (const ImageInfo *) NULL);
 736   assert(image_info->signature == MagickSignature);
 737   assert(image != (Image *) NULL);
 738   assert(image->signature == MagickSignature);
 739   if (image->debug != MagickFalse)
 740     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
 741   status=OpenBlob(image_info,image,WriteBinaryBlobMode,&image->exception);
 742   if (status == MagickFalse)
 743     return(status);
 744   scene=0;
 745   do
 746   {
 747     /*
 748       Initialize SUN raster file header.
 749     */
 750     if (image->colorspace != RGBColorspace)
 751       (void) TransformImageColorspace(image,RGBColorspace);
 752     sun_info.magic=0x59a66a95;
 753     if ((image->columns != (unsigned int) image->columns) ||
 754         (image->rows != (unsigned int) image->rows))
 755       ThrowWriterException(ImageError,"WidthOrHeightExceedsLimit");
 756     sun_info.width=(unsigned int) image->columns;
 757     sun_info.height=(unsigned int) image->rows;
 758     sun_info.type=(unsigned int)
 759       (image->storage_class == DirectClass ? RT_FORMAT_RGB : RT_STANDARD);
 760     sun_info.maptype=RMT_NONE;
 761     sun_info.maplength=0;
 762     number_pixels=(MagickSizeType) image->columns*image->rows;
 763     if ((4*number_pixels) != (size_t) (4*number_pixels))
 764       ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
 765     if (image->storage_class == DirectClass)
 766       {
 767         /*
 768           Full color SUN raster.
 769         */
 770         sun_info.depth=image->matte ? 32U : 24U;
 771         sun_info.length=(unsigned int) ((image->matte ? 4 : 3)*number_pixels);
 772         sun_info.length+=sun_info.length & 0x01 ? image->rows : 0;
 773       }
 774     else
 775       if (IsMonochromeImage(image,&image->exception))
 776         {
 777           /*
 778             Monochrome SUN raster.
 779           */
 780           sun_info.depth=1;
 781           sun_info.length=(unsigned int) (((image->columns+7) >> 3)*
 782             image->rows);
 783           sun_info.length+=((image->columns/8)+(image->columns % 8 ? 1 : 0)) %
 784             2 ? image->rows : 0;
 785         }
 786       else
 787         {
 788           /*
 789             Colormapped SUN raster.
 790           */
 791           sun_info.depth=8;
 792           sun_info.length=(unsigned int) number_pixels;
 793           sun_info.length+=image->columns & 0x01 ? image->rows : 0;
 794           sun_info.maptype=RMT_EQUAL_RGB;
 795           sun_info.maplength=(unsigned int) (3*image->colors);
 796         }
 797     /*
 798       Write SUN header.
 799     */
 800     (void) WriteBlobMSBLong(image,sun_info.magic);
 801     (void) WriteBlobMSBLong(image,sun_info.width);
 802     (void) WriteBlobMSBLong(image,sun_info.height);
 803     (void) WriteBlobMSBLong(image,sun_info.depth);
 804     (void) WriteBlobMSBLong(image,sun_info.length);
 805     (void) WriteBlobMSBLong(image,sun_info.type);
 806     (void) WriteBlobMSBLong(image,sun_info.maptype);
 807     (void) WriteBlobMSBLong(image,sun_info.maplength);
 808     /*
 809       Convert MIFF to SUN raster pixels.
 810     */
 811     x=0;
 812     y=0;
 813     if (image->storage_class == DirectClass)
 814       {
 815         register unsigned char
 816           *q;
 817
 818         size_t
 819           bytes_per_pixel,
 820           length;
 821
 822         unsigned char
 823           *pixels;
 824
 825         /*
 826           Allocate memory for pixels.
 827         */
 828         bytes_per_pixel=3;
 829         if (image->matte != MagickFalse)
 830           bytes_per_pixel++;
 831         length=image->columns;
 832         pixels=(unsigned char *) AcquireQuantumMemory(length,4*sizeof(*pixels));
 833         if (pixels == (unsigned char *) NULL)
 834           ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
 835         /*
 836           Convert DirectClass packet to SUN RGB pixel.
 837         */
 838         for (y=0; y < (long) image->rows; y++)
 839         {
 840           p=GetVirtualPixels(image,0,y,image->columns,1,&image->exception);
 841           if (p == (const PixelPacket *) NULL)
 842             break;
 843           q=pixels;
 844           for (x=0; x < (long) image->columns; x++)
 845           {
 846             if (image->matte != MagickFalse)
 847               *q++=ScaleQuantumToChar((Quantum) (GetAlphaPixelComponent(p)));
 848             *q++=ScaleQuantumToChar(GetRedPixelComponent(p));
 849             *q++=ScaleQuantumToChar(GetGreenPixelComponent(p));
 850             *q++=ScaleQuantumToChar(GetBluePixelComponent(p));
 851             p++;
 852           }
 853           if (((bytes_per_pixel*image->columns) & 0x01) != 0)
 854             *q++='\0';  /* pad scanline */
 855           (void) WriteBlob(image,(size_t) (q-pixels),pixels);
 856           if (image->previous == (Image *) NULL)
 857             {
 858               status=SetImageProgress(image,SaveImageTag,y,image->rows);
 859               if (status == MagickFalse)
 860                 break;
 861             }
 862         }
 863         pixels=(unsigned char *) RelinquishMagickMemory(pixels);
 864       }
 865     else
 866       if (IsMonochromeImage(image,&image->exception))
 867         {
 868           register unsigned char
 869             bit,
 870             byte;
 871
 872           /*
 873             Convert PseudoClass image to a SUN monochrome image.
 874           */
 875           (void) SetImageType(image,BilevelType);
 876           for (y=0; y < (long) image->rows; y++)
 877           {
 878             p=GetVirtualPixels(image,0,y,image->columns,1,&image->exception);
 879             if (p == (const PixelPacket *) NULL)
 880               break;
 881             indexes=GetVirtualIndexQueue(image);
 882             bit=0;
 883             byte=0;
 884             for (x=0; x < (long) image->columns; x++)
 885             {
 886               byte<<=1;
 887               if (PixelIntensity(p) < (MagickRealType) (QuantumRange/2.0))
 888                 byte|=0x01;
 889               bit++;
 890               if (bit == 8)
 891                 {
 892                   (void) WriteBlobByte(image,byte);
 893                   bit=0;
 894                   byte=0;
 895                 }
 896               p++;
 897             }
 898             if (bit != 0)
 899               (void) WriteBlobByte(image,(unsigned char) (byte << (8-bit)));
 900             if ((((image->columns/8)+
 901                 (image->columns % 8 ? 1 : 0)) % 2) != 0)
 902               (void) WriteBlobByte(image,0);  /* pad scanline */
 903             if (image->previous == (Image *) NULL)
 904               {
 905                 status=SetImageProgress(image,SaveImageTag,y,image->rows);
 906                 if (status == MagickFalse)
 907                   break;
 908               }
 909           }
 910         }
 911       else
 912         {
 913           /*
 914             Dump colormap to file.
 915           */
 916           for (i=0; i < (long) image->colors; i++)
 917             (void) WriteBlobByte(image,
 918               ScaleQuantumToChar(image->colormap[i].red));
 919           for (i=0; i < (long) image->colors; i++)
 920             (void) WriteBlobByte(image,
 921               ScaleQuantumToChar(image->colormap[i].green));
 922           for (i=0; i < (long) image->colors; i++)
 923             (void) WriteBlobByte(image,
 924               ScaleQuantumToChar(image->colormap[i].blue));
 925           /*
 926             Convert PseudoClass packet to SUN colormapped pixel.
 927           */
 928           for (y=0; y < (long) image->rows; y++)
 929           {
 930             p=GetVirtualPixels(image,0,y,image->columns,1,&image->exception);
 931             if (p == (const PixelPacket *) NULL)
 932               break;
 933             indexes=GetVirtualIndexQueue(image);
 934             for (x=0; x < (long) image->columns; x++)
 935             {
 936               (void) WriteBlobByte(image,(unsigned char) indexes[x]);
 937               p++;
 938             }
 939             if (image->columns & 0x01)
 940               (void) WriteBlobByte(image,0);  /* pad scanline */
 941             if (image->previous == (Image *) NULL)
 942               {
 943                 status=SetImageProgress(image,SaveImageTag,y,image->rows);
 944                 if (status == MagickFalse)
 945                   break;
 946               }
 947           }
 948         }
 949     if (GetNextImageInList(image) == (Image *) NULL)
 950       break;
 951     image=SyncNextImageInList(image);
 952     status=SetImageProgress(image,SaveImagesTag,scene++,
 953       GetImageListLength(image));
 954     if (status == MagickFalse)
 955       break;
 956   } while (image_info->adjoin != MagickFalse);
 957   (void) CloseBlob(image);
 958   return(MagickTrue);
 959 }