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 1999-2011 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     *l,
 142     *p;
 143
 144   register unsigned char
 145     *q;
 146
 147   ssize_t
 148     count;
 149
 150   unsigned char
 151     byte;
 152
 153   (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
 154   assert(compressed_pixels != (unsigned char *) NULL);
 155   assert(pixels != (unsigned char *) NULL);
 156   p=compressed_pixels;
 157   q=pixels;
 158   l=q+maxpixels;
 159   while (((size_t) (p-compressed_pixels) < length) && (q < l))
 160   {
 161     byte=(*p++);
 162     if (byte != 128U)
 163       *q++=byte;
 164     else
 165       {
 166         /*
 167           Runlength-encoded packet: <count><byte>
 168         */
 169         count=(ssize_t) (*p++);
 170         if (count > 0)
 171           byte=(*p++);
 172         while ((count >= 0) && (q < l))
 173         {
 174           *q++=byte;
 175           count--;
 176         }
 177      }
 178   }
 179   return(MagickTrue);
 180 }
 181 \f
 182 /*
 183 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 184 %                                                                             %
 185 %                                                                             %
 186 %                                                                             %
 187 %   R e a d S U N I m a g e                                                   %
 188 %                                                                             %
 189 %                                                                             %
 190 %                                                                             %
 191 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 192 %
 193 %  ReadSUNImage() reads a SUN image file and returns it.  It allocates
 194 %  the memory necessary for the new Image structure and returns a pointer to
 195 %  the new image.
 196 %
 197 %  The format of the ReadSUNImage method is:
 198 %
 199 %      Image *ReadSUNImage(const ImageInfo *image_info,ExceptionInfo *exception)
 200 %
 201 %  A description of each parameter follows:
 202 %
 203 %    o image_info: the image info.
 204 %
 205 %    o exception: return any errors or warnings in this structure.
 206 %
 207 */
 208 static Image *ReadSUNImage(const ImageInfo *image_info,ExceptionInfo *exception)
 209 {
 210 #define RMT_EQUAL_RGB  1
 211 #define RMT_NONE  0
 212 #define RMT_RAW  2
 213 #define RT_STANDARD  1
 214 #define RT_ENCODED  2
 215 #define RT_FORMAT_RGB  3
 216
 217   typedef struct _SUNInfo
 218   {
 219     unsigned int
 220       magic,
 221       width,
 222       height,
 223       depth,
 224       length,
 225       type,
 226       maptype,
 227       maplength;
 228   } SUNInfo;
 229
 230   Image
 231     *image;
 232
 233   int
 234     bit;
 235
 236   MagickBooleanType
 237     status;
 238
 239   MagickSizeType
 240     number_pixels;
 241
 242   register IndexPacket
 243     *indexes;
 244
 245   register PixelPacket
 246     *q;
 247
 248   register ssize_t
 249     i,
 250     x;
 251
 252   register unsigned char
 253     *p;
 254
 255   size_t
 256     length;
 257
 258   ssize_t
 259     count,
 260     y;
 261
 262   SUNInfo
 263     sun_info;
 264
 265   unsigned char
 266     *sun_data,
 267     *sun_pixels;
 268
 269   unsigned int
 270     bytes_per_line;
 271
 272   /*
 273     Open image file.
 274   */
 275   assert(image_info != (const ImageInfo *) NULL);
 276   assert(image_info->signature == MagickSignature);
 277   if (image_info->debug != MagickFalse)
 278     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
 279       image_info->filename);
 280   assert(exception != (ExceptionInfo *) NULL);
 281   assert(exception->signature == MagickSignature);
 282   image=AcquireImage(image_info);
 283   status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
 284   if (status == MagickFalse)
 285     {
 286       image=DestroyImageList(image);
 287       return((Image *) NULL);
 288     }
 289   /*
 290     Read SUN raster header.
 291   */
 292   (void) ResetMagickMemory(&sun_info,0,sizeof(sun_info));
 293   sun_info.magic=ReadBlobMSBLong(image);
 294   do
 295   {
 296     /*
 297       Verify SUN identifier.
 298     */
 299     if (sun_info.magic != 0x59a66a95)
 300       ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 301     sun_info.width=ReadBlobMSBLong(image);
 302     sun_info.height=ReadBlobMSBLong(image);
 303     sun_info.depth=ReadBlobMSBLong(image);
 304     sun_info.length=ReadBlobMSBLong(image);
 305     sun_info.type=ReadBlobMSBLong(image);
 306     sun_info.maptype=ReadBlobMSBLong(image);
 307     sun_info.maplength=ReadBlobMSBLong(image);
 308     image->columns=sun_info.width;
 309     image->rows=sun_info.height;
 310     if ((sun_info.depth == 0) || (sun_info.depth > 32))
 311       ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 312     image->depth=sun_info.depth <= 8 ? sun_info.depth :
 313       MAGICKCORE_QUANTUM_DEPTH;
 314     if (sun_info.depth < 24)
 315       {
 316         size_t
 317           one;
 318
 319         image->storage_class=PseudoClass;
 320         image->colors=sun_info.maplength;
 321         one=1;
 322         if (sun_info.maptype == RMT_NONE)
 323           image->colors=one << sun_info.depth;
 324         if (sun_info.maptype == RMT_EQUAL_RGB)
 325           image->colors=sun_info.maplength/3;
 326       }
 327     switch (sun_info.maptype)
 328     {
 329       case RMT_NONE:
 330       {
 331         if (sun_info.depth < 24)
 332           {
 333             /*
 334               Create linear color ramp.
 335             */
 336             if (AcquireImageColormap(image,image->colors) == MagickFalse)
 337               ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 338           }
 339         break;
 340       }
 341       case RMT_EQUAL_RGB:
 342       {
 343         unsigned char
 344           *sun_colormap;
 345
 346         /*
 347           Read SUN raster colormap.
 348         */
 349         if (AcquireImageColormap(image,image->colors) == MagickFalse)
 350           ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 351         sun_colormap=(unsigned char *) AcquireQuantumMemory(image->colors,
 352           sizeof(*sun_colormap));
 353         if (sun_colormap == (unsigned char *) NULL)
 354           ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 355         count=ReadBlob(image,image->colors,sun_colormap);
 356         for (i=0; i < (ssize_t) image->colors; i++)
 357           image->colormap[i].red=ScaleCharToQuantum(sun_colormap[i]);
 358         count=ReadBlob(image,image->colors,sun_colormap);
 359         for (i=0; i < (ssize_t) image->colors; i++)
 360           image->colormap[i].green=ScaleCharToQuantum(sun_colormap[i]);
 361         count=ReadBlob(image,image->colors,sun_colormap);
 362         for (i=0; i < (ssize_t) image->colors; i++)
 363           image->colormap[i].blue=ScaleCharToQuantum(sun_colormap[i]);
 364         sun_colormap=(unsigned char *) RelinquishMagickMemory(sun_colormap);
 365         break;
 366       }
 367       case RMT_RAW:
 368       {
 369         unsigned char
 370           *sun_colormap;
 371
 372         /*
 373           Read SUN raster colormap.
 374         */
 375         sun_colormap=(unsigned char *) AcquireQuantumMemory(sun_info.maplength,
 376           sizeof(*sun_colormap));
 377         if (sun_colormap == (unsigned char *) NULL)
 378           ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 379         count=ReadBlob(image,sun_info.maplength,sun_colormap);
 380         sun_colormap=(unsigned char *) RelinquishMagickMemory(sun_colormap);
 381         break;
 382       }
 383       default:
 384         ThrowReaderException(CoderError,"ColormapTypeNotSupported");
 385     }
 386     image->matte=sun_info.depth == 32 ? MagickTrue : MagickFalse;
 387     image->columns=sun_info.width;
 388     image->rows=sun_info.height;
 389     if (image_info->ping != MagickFalse)
 390       {
 391         (void) CloseBlob(image);
 392         return(GetFirstImageInList(image));
 393       }
 394     if ((sun_info.length*sizeof(*sun_data))/sizeof(*sun_data) !=
 395         sun_info.length || !sun_info.length)
 396       ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 397     number_pixels=(MagickSizeType) image->columns*image->rows;
 398     if ((sun_info.depth >= 8) &&
 399         ((number_pixels*((sun_info.depth+7)/8)) > sun_info.length))
 400       ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 401     sun_data=(unsigned char *) AcquireQuantumMemory((size_t) sun_info.length,
 402       sizeof(*sun_data));
 403     if (sun_data == (unsigned char *) NULL)
 404       ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 405     count=(ssize_t) ReadBlob(image,sun_info.length,sun_data);
 406     if ((count == 0) && (sun_info.type != RT_ENCODED))
 407       ThrowReaderException(CorruptImageError,"UnableToReadImageData");
 408     sun_pixels=sun_data;
 409     bytes_per_line=0;
 410     if (sun_info.type == RT_ENCODED)
 411       {
 412         size_t
 413           height;
 414
 415         /*
 416           Read run-length encoded raster pixels.
 417         */
 418         height=sun_info.height;
 419         bytes_per_line=sun_info.width*sun_info.depth;
 420         if ((height == 0) || (sun_info.width == 0) || (sun_info.depth == 0) ||
 421             ((bytes_per_line/sun_info.depth) != sun_info.width))
 422           ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 423         bytes_per_line+=15;
 424         bytes_per_line<<=1;
 425         if ((bytes_per_line >> 1) != (sun_info.width*sun_info.depth+15))
 426           ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 427         bytes_per_line>>=4;
 428         sun_pixels=(unsigned char *) AcquireQuantumMemory(height,
 429           bytes_per_line*sizeof(*sun_pixels));
 430         if (sun_pixels == (unsigned char *) NULL)
 431           ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 432         (void) DecodeImage(sun_data,sun_info.length,sun_pixels,
 433           bytes_per_line*height);
 434         sun_data=(unsigned char *) RelinquishMagickMemory(sun_data);
 435       }
 436     /*
 437       Convert SUN raster image to pixel packets.
 438     */
 439     p=sun_pixels;
 440     if (sun_info.depth == 1)
 441       for (y=0; y < (ssize_t) image->rows; y++)
 442       {
 443         q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 444         if (q == (PixelPacket *) NULL)
 445           break;
 446         indexes=GetAuthenticIndexQueue(image);
 447         for (x=0; x < ((ssize_t) image->columns-7); x+=8)
 448         {
 449           for (bit=7; bit >= 0; bit--)
 450             SetIndexPixelComponent(indexes+x+7-bit,((*p) & (0x01 << bit) ?
 451               0x00 : 0x01));
 452           p++;
 453         }
 454         if ((image->columns % 8) != 0)
 455           {
 456             for (bit=7; bit >= (ssize_t) (8-(image->columns % 8)); bit--)
 457               SetIndexPixelComponent(indexes+x+7-bit,(*p) & (0x01 << bit) ?
 458                 0x00 : 0x01);
 459             p++;
 460           }
 461         if ((((image->columns/8)+(image->columns % 8 ? 1 : 0)) % 2) != 0)
 462           p++;
 463         if (SyncAuthenticPixels(image,exception) == MagickFalse)
 464           break;
 465         if (image->previous == (Image *) NULL)
 466           {
 467             status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
 468               image->rows);
 469             if (status == MagickFalse)
 470               break;
 471           }
 472       }
 473     else
 474       if (image->storage_class == PseudoClass)
 475         {
 476           length=image->rows*(image->columns+image->columns % 2);
 477           if (((sun_info.type == RT_ENCODED) &&
 478                (length > (bytes_per_line*image->rows))) ||
 479               ((sun_info.type != RT_ENCODED) && (length > sun_info.length)))
 480             ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 481           for (y=0; y < (ssize_t) image->rows; y++)
 482           {
 483             q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 484             if (q == (PixelPacket *) NULL)
 485               break;
 486             indexes=GetAuthenticIndexQueue(image);
 487             for (x=0; x < (ssize_t) image->columns; x++)
 488               SetIndexPixelComponent(indexes+x,*p++);
 489             if ((image->columns % 2) != 0)
 490               p++;
 491             if (SyncAuthenticPixels(image,exception) == MagickFalse)
 492               break;
 493             if (image->previous == (Image *) NULL)
 494               {
 495                 status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
 496                 image->rows);
 497                 if (status == MagickFalse)
 498                   break;
 499               }
 500           }
 501         }
 502       else
 503         {
 504           size_t
 505             bytes_per_pixel;
 506
 507           bytes_per_pixel=3;
 508           if (image->matte != MagickFalse)
 509             bytes_per_pixel++;
 510           length=image->rows*((bytes_per_line*image->columns)+
 511             image->columns % 2);
 512           if (((sun_info.type == RT_ENCODED) &&
 513                (length > (bytes_per_line*image->rows))) ||
 514               ((sun_info.type != RT_ENCODED) && (length > sun_info.length)))
 515             ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 516           for (y=0; y < (ssize_t) image->rows; y++)
 517           {
 518             q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 519             if (q == (PixelPacket *) NULL)
 520               break;
 521             for (x=0; x < (ssize_t) image->columns; x++)
 522             {
 523               if (image->matte != MagickFalse)
 524                 SetOpacityPixelComponent(q,(QuantumRange-
 525                   ScaleCharToQuantum(*p++)));
 526               if (sun_info.type == RT_STANDARD)
 527                 {
 528                   SetBluePixelComponent(q,ScaleCharToQuantum(*p++));
 529                   SetGreenPixelComponent(q,ScaleCharToQuantum(*p++));
 530                   SetRedPixelComponent(q,ScaleCharToQuantum(*p++));
 531                 }
 532               else
 533                 {
 534                   SetRedPixelComponent(q,ScaleCharToQuantum(*p++));
 535                   SetGreenPixelComponent(q,ScaleCharToQuantum(*p++));
 536                   SetBluePixelComponent(q,ScaleCharToQuantum(*p++));
 537                 }
 538               if (image->colors != 0)
 539                 {
 540                   SetRedPixelComponent(q,image->colormap[(ssize_t)
 541                     q->red].red);
 542                   SetGreenPixelComponent(q,image->colormap[(ssize_t)
 543                     q->green].green);
 544                   SetBluePixelComponent(q,image->colormap[(ssize_t)
 545                     q->blue].blue);
 546                 }
 547               q++;
 548             }
 549             if (((bytes_per_pixel*image->columns) % 2) != 0)
 550               p++;
 551             if (SyncAuthenticPixels(image,exception) == MagickFalse)
 552               break;
 553             if (image->previous == (Image *) NULL)
 554               {
 555                 status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
 556                 image->rows);
 557                 if (status == MagickFalse)
 558                   break;
 559               }
 560           }
 561         }
 562     if (image->storage_class == PseudoClass)
 563       (void) SyncImage(image);
 564     sun_pixels=(unsigned char *) RelinquishMagickMemory(sun_pixels);
 565     if (EOFBlob(image) != MagickFalse)
 566       {
 567         ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
 568           image->filename);
 569         break;
 570       }
 571     /*
 572       Proceed to next image.
 573     */
 574     if (image_info->number_scenes != 0)
 575       if (image->scene >= (image_info->scene+image_info->number_scenes-1))
 576         break;
 577     sun_info.magic=ReadBlobMSBLong(image);
 578     if (sun_info.magic == 0x59a66a95)
 579       {
 580         /*
 581           Allocate next image structure.
 582         */
 583         AcquireNextImage(image_info,image);
 584         if (GetNextImageInList(image) == (Image *) NULL)
 585           {
 586             image=DestroyImageList(image);
 587             return((Image *) NULL);
 588           }
 589         image=SyncNextImageInList(image);
 590         status=SetImageProgress(image,LoadImagesTag,TellBlob(image),
 591           GetBlobSize(image));
 592         if (status == MagickFalse)
 593           break;
 594       }
 595   } while (sun_info.magic == 0x59a66a95);
 596   (void) CloseBlob(image);
 597   return(GetFirstImageInList(image));
 598 }
 599 \f
 600 /*
 601 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 602 %                                                                             %
 603 %                                                                             %
 604 %                                                                             %
 605 %   R e g i s t e r S U N I m a g e                                           %
 606 %                                                                             %
 607 %                                                                             %
 608 %                                                                             %
 609 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 610 %
 611 %  RegisterSUNImage() adds attributes for the SUN image format to
 612 %  the list of supported formats.  The attributes include the image format
 613 %  tag, a method to read and/or write the format, whether the format
 614 %  supports the saving of more than one frame to the same file or blob,
 615 %  whether the format supports native in-memory I/O, and a brief
 616 %  description of the format.
 617 %
 618 %  The format of the RegisterSUNImage method is:
 619 %
 620 %      size_t RegisterSUNImage(void)
 621 %
 622 */
 623 ModuleExport size_t RegisterSUNImage(void)
 624 {
 625   MagickInfo
 626     *entry;
 627
 628   entry=SetMagickInfo("RAS");
 629   entry->decoder=(DecodeImageHandler *) ReadSUNImage;
 630   entry->encoder=(EncodeImageHandler *) WriteSUNImage;
 631   entry->magick=(IsImageFormatHandler *) IsSUN;
 632   entry->description=ConstantString("SUN Rasterfile");
 633   entry->module=ConstantString("SUN");
 634   (void) RegisterMagickInfo(entry);
 635   entry=SetMagickInfo("SUN");
 636   entry->decoder=(DecodeImageHandler *) ReadSUNImage;
 637   entry->encoder=(EncodeImageHandler *) WriteSUNImage;
 638   entry->description=ConstantString("SUN Rasterfile");
 639   entry->module=ConstantString("SUN");
 640   (void) RegisterMagickInfo(entry);
 641   return(MagickImageCoderSignature);
 642 }
 643 \f
 644 /*
 645 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 646 %                                                                             %
 647 %                                                                             %
 648 %                                                                             %
 649 %   U n r e g i s t e r S U N I m a g e                                       %
 650 %                                                                             %
 651 %                                                                             %
 652 %                                                                             %
 653 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 654 %
 655 %  UnregisterSUNImage() removes format registrations made by the
 656 %  SUN module from the list of supported formats.
 657 %
 658 %  The format of the UnregisterSUNImage method is:
 659 %
 660 %      UnregisterSUNImage(void)
 661 %
 662 */
 663 ModuleExport void UnregisterSUNImage(void)
 664 {
 665   (void) UnregisterMagickInfo("RAS");
 666   (void) UnregisterMagickInfo("SUN");
 667 }
 668 \f
 669 /*
 670 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 671 %                                                                             %
 672 %                                                                             %
 673 %                                                                             %
 674 %   W r i t e S U N I m a g e                                                 %
 675 %                                                                             %
 676 %                                                                             %
 677 %                                                                             %
 678 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 679 %
 680 %  WriteSUNImage() writes an image in the SUN rasterfile format.
 681 %
 682 %  The format of the WriteSUNImage method is:
 683 %
 684 %      MagickBooleanType WriteSUNImage(const ImageInfo *image_info,Image *image)
 685 %
 686 %  A description of each parameter follows.
 687 %
 688 %    o image_info: the image info.
 689 %
 690 %    o image:  The image.
 691 %
 692 */
 693 static MagickBooleanType WriteSUNImage(const ImageInfo *image_info,Image *image)
 694 {
 695 #define RMT_EQUAL_RGB  1
 696 #define RMT_NONE  0
 697 #define RMT_RAW  2
 698 #define RT_STANDARD  1
 699 #define RT_FORMAT_RGB  3
 700
 701   typedef struct _SUNInfo
 702   {
 703     unsigned int
 704       magic,
 705       width,
 706       height,
 707       depth,
 708       length,
 709       type,
 710       maptype,
 711       maplength;
 712   } SUNInfo;
 713
 714   MagickBooleanType
 715     status;
 716
 717   MagickOffsetType
 718     scene;
 719
 720   MagickSizeType
 721     number_pixels;
 722
 723   register const IndexPacket
 724     *indexes;
 725
 726   register const PixelPacket
 727     *p;
 728
 729   register ssize_t
 730     i,
 731     x;
 732
 733   ssize_t
 734     y;
 735
 736   SUNInfo
 737     sun_info;
 738
 739   /*
 740     Open output image file.
 741   */
 742   assert(image_info != (const ImageInfo *) NULL);
 743   assert(image_info->signature == MagickSignature);
 744   assert(image != (Image *) NULL);
 745   assert(image->signature == MagickSignature);
 746   if (image->debug != MagickFalse)
 747     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
 748   status=OpenBlob(image_info,image,WriteBinaryBlobMode,&image->exception);
 749   if (status == MagickFalse)
 750     return(status);
 751   scene=0;
 752   do
 753   {
 754     /*
 755       Initialize SUN raster file header.
 756     */
 757     if (image->colorspace != RGBColorspace)
 758       (void) TransformImageColorspace(image,RGBColorspace);
 759     sun_info.magic=0x59a66a95;
 760     if ((image->columns != (unsigned int) image->columns) ||
 761         (image->rows != (unsigned int) image->rows))
 762       ThrowWriterException(ImageError,"WidthOrHeightExceedsLimit");
 763     sun_info.width=(unsigned int) image->columns;
 764     sun_info.height=(unsigned int) image->rows;
 765     sun_info.type=(unsigned int)
 766       (image->storage_class == DirectClass ? RT_FORMAT_RGB : RT_STANDARD);
 767     sun_info.maptype=RMT_NONE;
 768     sun_info.maplength=0;
 769     number_pixels=(MagickSizeType) image->columns*image->rows;
 770     if ((4*number_pixels) != (size_t) (4*number_pixels))
 771       ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
 772     if (image->storage_class == DirectClass)
 773       {
 774         /*
 775           Full color SUN raster.
 776         */
 777         sun_info.depth=(unsigned int) image->matte ? 32U : 24U;
 778         sun_info.length=(unsigned int) ((image->matte ? 4 : 3)*number_pixels);
 779         sun_info.length+=sun_info.length & 0x01 ? (unsigned int) image->rows :
 780           0;
 781       }
 782     else
 783       if (IsMonochromeImage(image,&image->exception))
 784         {
 785           /*
 786             Monochrome SUN raster.
 787           */
 788           sun_info.depth=1;
 789           sun_info.length=(unsigned int) (((image->columns+7) >> 3)*
 790             image->rows);
 791           sun_info.length+=(unsigned int) (((image->columns/8)+(image->columns %
 792             8 ? 1 : 0)) % 2 ? image->rows : 0);
 793         }
 794       else
 795         {
 796           /*
 797             Colormapped SUN raster.
 798           */
 799           sun_info.depth=8;
 800           sun_info.length=(unsigned int) number_pixels;
 801           sun_info.length+=(unsigned int) (image->columns & 0x01 ? image->rows :
 802             0);
 803           sun_info.maptype=RMT_EQUAL_RGB;
 804           sun_info.maplength=(unsigned int) (3*image->colors);
 805         }
 806     /*
 807       Write SUN header.
 808     */
 809     (void) WriteBlobMSBLong(image,sun_info.magic);
 810     (void) WriteBlobMSBLong(image,sun_info.width);
 811     (void) WriteBlobMSBLong(image,sun_info.height);
 812     (void) WriteBlobMSBLong(image,sun_info.depth);
 813     (void) WriteBlobMSBLong(image,sun_info.length);
 814     (void) WriteBlobMSBLong(image,sun_info.type);
 815     (void) WriteBlobMSBLong(image,sun_info.maptype);
 816     (void) WriteBlobMSBLong(image,sun_info.maplength);
 817     /*
 818       Convert MIFF to SUN raster pixels.
 819     */
 820     x=0;
 821     y=0;
 822     if (image->storage_class == DirectClass)
 823       {
 824         register unsigned char
 825           *q;
 826
 827         size_t
 828           bytes_per_pixel,
 829           length;
 830
 831         unsigned char
 832           *pixels;
 833
 834         /*
 835           Allocate memory for pixels.
 836         */
 837         bytes_per_pixel=3;
 838         if (image->matte != MagickFalse)
 839           bytes_per_pixel++;
 840         length=image->columns;
 841         pixels=(unsigned char *) AcquireQuantumMemory(length,4*sizeof(*pixels));
 842         if (pixels == (unsigned char *) NULL)
 843           ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
 844         /*
 845           Convert DirectClass packet to SUN RGB pixel.
 846         */
 847         for (y=0; y < (ssize_t) image->rows; y++)
 848         {
 849           p=GetVirtualPixels(image,0,y,image->columns,1,&image->exception);
 850           if (p == (const PixelPacket *) NULL)
 851             break;
 852           q=pixels;
 853           for (x=0; x < (ssize_t) image->columns; x++)
 854           {
 855             if (image->matte != MagickFalse)
 856               *q++=ScaleQuantumToChar(GetAlphaPixelComponent(p));
 857             *q++=ScaleQuantumToChar(GetRedPixelComponent(p));
 858             *q++=ScaleQuantumToChar(GetGreenPixelComponent(p));
 859             *q++=ScaleQuantumToChar(GetBluePixelComponent(p));
 860             p++;
 861           }
 862           if (((bytes_per_pixel*image->columns) & 0x01) != 0)
 863             *q++='\0';  /* pad scanline */
 864           (void) WriteBlob(image,(size_t) (q-pixels),pixels);
 865           if (image->previous == (Image *) NULL)
 866             {
 867               status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
 868                 image->rows);
 869               if (status == MagickFalse)
 870                 break;
 871             }
 872         }
 873         pixels=(unsigned char *) RelinquishMagickMemory(pixels);
 874       }
 875     else
 876       if (IsMonochromeImage(image,&image->exception))
 877         {
 878           register unsigned char
 879             bit,
 880             byte;
 881
 882           /*
 883             Convert PseudoClass image to a SUN monochrome image.
 884           */
 885           (void) SetImageType(image,BilevelType);
 886           for (y=0; y < (ssize_t) image->rows; y++)
 887           {
 888             p=GetVirtualPixels(image,0,y,image->columns,1,&image->exception);
 889             if (p == (const PixelPacket *) NULL)
 890               break;
 891             indexes=GetVirtualIndexQueue(image);
 892             bit=0;
 893             byte=0;
 894             for (x=0; x < (ssize_t) image->columns; x++)
 895             {
 896               byte<<=1;
 897               if (PixelIntensity(p) < (MagickRealType) (QuantumRange/2.0))
 898                 byte|=0x01;
 899               bit++;
 900               if (bit == 8)
 901                 {
 902                   (void) WriteBlobByte(image,byte);
 903                   bit=0;
 904                   byte=0;
 905                 }
 906               p++;
 907             }
 908             if (bit != 0)
 909               (void) WriteBlobByte(image,(unsigned char) (byte << (8-bit)));
 910             if ((((image->columns/8)+
 911                 (image->columns % 8 ? 1 : 0)) % 2) != 0)
 912               (void) WriteBlobByte(image,0);  /* pad scanline */
 913             if (image->previous == (Image *) NULL)
 914               {
 915                 status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
 916                 image->rows);
 917                 if (status == MagickFalse)
 918                   break;
 919               }
 920           }
 921         }
 922       else
 923         {
 924           /*
 925             Dump colormap to file.
 926           */
 927           for (i=0; i < (ssize_t) image->colors; i++)
 928             (void) WriteBlobByte(image,ScaleQuantumToChar(
 929               image->colormap[i].red));
 930           for (i=0; i < (ssize_t) image->colors; i++)
 931             (void) WriteBlobByte(image,ScaleQuantumToChar(
 932               image->colormap[i].green));
 933           for (i=0; i < (ssize_t) image->colors; i++)
 934             (void) WriteBlobByte(image,ScaleQuantumToChar(
 935               image->colormap[i].blue));
 936           /*
 937             Convert PseudoClass packet to SUN colormapped pixel.
 938           */
 939           for (y=0; y < (ssize_t) image->rows; y++)
 940           {
 941             p=GetVirtualPixels(image,0,y,image->columns,1,&image->exception);
 942             if (p == (const PixelPacket *) NULL)
 943               break;
 944             indexes=GetVirtualIndexQueue(image);
 945             for (x=0; x < (ssize_t) image->columns; x++)
 946             {
 947               (void) WriteBlobByte(image,(unsigned char)
 948                 GetIndexPixelComponent(indexes+x));
 949               p++;
 950             }
 951             if (image->columns & 0x01)
 952               (void) WriteBlobByte(image,0);  /* pad scanline */
 953             if (image->previous == (Image *) NULL)
 954               {
 955                 status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
 956                   image->rows);
 957                 if (status == MagickFalse)
 958                   break;
 959               }
 960           }
 961         }
 962     if (GetNextImageInList(image) == (Image *) NULL)
 963       break;
 964     image=SyncNextImageInList(image);
 965     status=SetImageProgress(image,SaveImagesTag,scene++,
 966       GetImageListLength(image));
 967     if (status == MagickFalse)
 968       break;
 969   } while (image_info->adjoin != MagickFalse);
 970   (void) CloseBlob(image);
 971   return(MagickTrue);
 972 }