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

   1 /*
   2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   3 %                                                                             %
   4 %                                                                             %
   5 %                                                                             %
   6 %                            PPPP    CCCC  L                                  %
   7 %                            P   P  C      L                                  %
   8 %                            PPPP   C      L                                  %
   9 %                            P      C      L                                  %
  10 %                            P       CCCC  LLLLL                              %
  11 %                                                                             %
  12 %                                                                             %
  13 %                      Read/Write HP PCL Printer 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 "MagickCore/studio.h"
  43 #include "MagickCore/attribute.h"
  44 #include "MagickCore/blob.h"
  45 #include "MagickCore/blob-private.h"
  46 #include "MagickCore/cache.h"
  47 #include "MagickCore/color.h"
  48 #include "MagickCore/color-private.h"
  49 #include "MagickCore/colorspace.h"
  50 #include "MagickCore/colorspace-private.h"
  51 #include "MagickCore/constitute.h"
  52 #include "MagickCore/delegate.h"
  53 #include "MagickCore/draw.h"
  54 #include "MagickCore/exception.h"
  55 #include "MagickCore/exception-private.h"
  56 #include "MagickCore/geometry.h"
  57 #include "MagickCore/image.h"
  58 #include "MagickCore/image-private.h"
  59 #include "MagickCore/list.h"
  60 #include "MagickCore/magick.h"
  61 #include "MagickCore/memory_.h"
  62 #include "MagickCore/monitor.h"
  63 #include "MagickCore/monitor-private.h"
  64 #include "MagickCore/option.h"
  65 #include "MagickCore/pixel-accessor.h"
  66 #include "MagickCore/profile.h"
  67 #include "MagickCore/property.h"
  68 #include "MagickCore/resource_.h"
  69 #include "MagickCore/quantum-private.h"
  70 #include "MagickCore/static.h"
  71 #include "MagickCore/string_.h"
  72 #include "MagickCore/module.h"
  73 #include "MagickCore/token.h"
  74 #include "MagickCore/transform.h"
  75 #include "MagickCore/utility.h"
  76 \f
  77 /*
  78   Forward declarations.
  79 */
  80 static MagickBooleanType
  81   WritePCLImage(const ImageInfo *,Image *);
  82 \f
  83 /*
  84 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  85 %                                                                             %
  86 %                                                                             %
  87 %                                                                             %
  88 %   I s P C L                                                                 %
  89 %                                                                             %
  90 %                                                                             %
  91 %                                                                             %
  92 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  93 %
  94 %  IsPCL() returns MagickTrue if the image format type, identified by the
  95 %  magick string, is PCL.
  96 %
  97 %  The format of the IsPCL method is:
  98 %
  99 %      MagickBooleanType IsPCL(const unsigned char *magick,const size_t length)
 100 %
 101 %  A description of each parameter follows:
 102 %
 103 %    o magick: compare image format pattern against these bytes.
 104 %
 105 %    o length: Specifies the length of the magick string.
 106 %
 107 */
 108 static MagickBooleanType IsPCL(const unsigned char *magick,const size_t length)
 109 {
 110   if (length < 4)
 111     return(MagickFalse);
 112   if (memcmp(magick,"\033E\033&",4) == 0)
 113     return(MagickFalse);
 114   if (memcmp(magick,"\033E\033",3) == 0)
 115     return(MagickTrue);
 116   return(MagickFalse);
 117 }
 118 \f
 119 /*
 120 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 121 %                                                                             %
 122 %                                                                             %
 123 %                                                                             %
 124 %   R e a d P C L I m a g e                                                   %
 125 %                                                                             %
 126 %                                                                             %
 127 %                                                                             %
 128 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 129 %
 130 %  ReadPCLImage() reads a Printer Control Language image file and returns it.
 131 %  It allocates the memory necessary for the new Image structure and returns a
 132 %  pointer to the new image.
 133 %
 134 %  The format of the ReadPCLImage method is:
 135 %
 136 %      Image *ReadPCLImage(const ImageInfo *image_info,ExceptionInfo *exception)
 137 %
 138 %  A description of each parameter follows:
 139 %
 140 %    o image_info: the image info.
 141 %
 142 %    o exception: return any errors or warnings in this structure.
 143 %
 144 */
 145 static Image *ReadPCLImage(const ImageInfo *image_info,ExceptionInfo *exception)
 146 {
 147 #define CropBox  "CropBox"
 148 #define DeviceCMYK  "DeviceCMYK"
 149 #define MediaBox  "MediaBox"
 150 #define RenderPCLText  "  Rendering PCL...  "
 151
 152   char
 153     command[MaxTextExtent],
 154     density[MaxTextExtent],
 155     filename[MaxTextExtent],
 156     geometry[MaxTextExtent],
 157     options[MaxTextExtent],
 158     input_filename[MaxTextExtent];
 159
 160   const DelegateInfo
 161     *delegate_info;
 162
 163   Image
 164     *image,
 165     *next_image;
 166
 167   ImageInfo
 168     *read_info;
 169
 170   MagickBooleanType
 171     cmyk,
 172     status;
 173
 174   PointInfo
 175     delta;
 176
 177   RectangleInfo
 178     bounding_box,
 179     page;
 180
 181   register char
 182     *p;
 183
 184   register ssize_t
 185     c;
 186
 187   SegmentInfo
 188     bounds;
 189
 190   size_t
 191     height,
 192     width;
 193
 194   ssize_t
 195     count;
 196
 197   assert(image_info != (const ImageInfo *) NULL);
 198   assert(image_info->signature == MagickSignature);
 199   if (image_info->debug != MagickFalse)
 200     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
 201       image_info->filename);
 202   assert(exception != (ExceptionInfo *) NULL);
 203   assert(exception->signature == MagickSignature);
 204   /*
 205     Open image file.
 206   */
 207   image=AcquireImage(image_info);
 208   status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
 209   if (status == MagickFalse)
 210     {
 211       image=DestroyImageList(image);
 212       return((Image *) NULL);
 213     }
 214   status=AcquireUniqueSymbolicLink(image_info->filename,input_filename);
 215   if (status == MagickFalse)
 216     {
 217       ThrowFileException(exception,FileOpenError,"UnableToCreateTemporaryFile",
 218         image_info->filename);
 219       image=DestroyImageList(image);
 220       return((Image *) NULL);
 221     }
 222   /*
 223     Set the page density.
 224   */
 225   delta.x=DefaultResolution;
 226   delta.y=DefaultResolution;
 227   if ((image->x_resolution == 0.0) || (image->y_resolution == 0.0))
 228     {
 229       GeometryInfo
 230         geometry_info;
 231
 232       MagickStatusType
 233         flags;
 234
 235       flags=ParseGeometry(PSDensityGeometry,&geometry_info);
 236       image->x_resolution=geometry_info.rho;
 237       image->y_resolution=geometry_info.sigma;
 238       if ((flags & SigmaValue) == 0)
 239         image->y_resolution=image->x_resolution;
 240     }
 241   /*
 242     Determine page geometry from the PCL media box.
 243   */
 244   cmyk=image->colorspace == CMYKColorspace ? MagickTrue : MagickFalse;
 245   count=0;
 246   (void) ResetMagickMemory(&bounding_box,0,sizeof(bounding_box));
 247   (void) ResetMagickMemory(&bounds,0,sizeof(bounds));
 248   (void) ResetMagickMemory(&page,0,sizeof(page));
 249   (void) ResetMagickMemory(command,0,sizeof(command));
 250   p=command;
 251   for (c=ReadBlobByte(image); c != EOF; c=ReadBlobByte(image))
 252   {
 253     if (image_info->page != (char *) NULL)
 254       continue;
 255     /*
 256       Note PCL elements.
 257     */
 258     *p++=(char) c;
 259     if ((c != (int) '/') && (c != '\n') &&
 260         ((size_t) (p-command) < (MaxTextExtent-1)))
 261       continue;
 262     *p='\0';
 263     p=command;
 264     /*
 265       Is this a CMYK document?
 266     */
 267     if (LocaleNCompare(DeviceCMYK,command,strlen(DeviceCMYK)) == 0)
 268       cmyk=MagickTrue;
 269     if (LocaleNCompare(CropBox,command,strlen(CropBox)) == 0)
 270       {
 271         /*
 272           Note region defined by crop box.
 273         */
 274         count=(ssize_t) sscanf(command,"CropBox [%lf %lf %lf %lf",
 275           &bounds.x1,&bounds.y1,&bounds.x2,&bounds.y2);
 276         if (count != 4)
 277           count=(ssize_t) sscanf(command,"CropBox[%lf %lf %lf %lf",
 278             &bounds.x1,&bounds.y1,&bounds.x2,&bounds.y2);
 279       }
 280     if (LocaleNCompare(MediaBox,command,strlen(MediaBox)) == 0)
 281       {
 282         /*
 283           Note region defined by media box.
 284         */
 285         count=(ssize_t) sscanf(command,"MediaBox [%lf %lf %lf %lf",
 286           &bounds.x1,&bounds.y1,&bounds.x2,&bounds.y2);
 287         if (count != 4)
 288           count=(ssize_t) sscanf(command,"MediaBox[%lf %lf %lf %lf",
 289             &bounds.x1,&bounds.y1,&bounds.x2,&bounds.y2);
 290       }
 291     if (count != 4)
 292       continue;
 293     /*
 294       Set PCL render geometry.
 295     */
 296     width=(size_t) floor(bounds.x2-bounds.x1+0.5);
 297     height=(size_t) floor(bounds.y2-bounds.y1+0.5);
 298     if (width > page.width)
 299       page.width=width;
 300     if (height > page.height)
 301       page.height=height;
 302   }
 303   (void) CloseBlob(image);
 304   /*
 305     Render PCL with the GhostPCL delegate.
 306   */
 307   if ((page.width == 0) || (page.height == 0))
 308     (void) ParseAbsoluteGeometry(PSPageGeometry,&page);
 309   if (image_info->page != (char *) NULL)
 310     (void) ParseAbsoluteGeometry(image_info->page,&page);
 311   (void) FormatLocaleString(geometry,MaxTextExtent,"%.20gx%.20g",(double)
 312     page.width,(double) page.height);
 313   if (image_info->monochrome != MagickFalse)
 314     delegate_info=GetDelegateInfo("pcl:mono",(char *) NULL,exception);
 315   else
 316      if (cmyk != MagickFalse)
 317        delegate_info=GetDelegateInfo("pcl:cmyk",(char *) NULL,exception);
 318      else
 319        delegate_info=GetDelegateInfo("pcl:color",(char *) NULL,exception);
 320   if (delegate_info == (const DelegateInfo *) NULL)
 321     return((Image *) NULL);
 322   *options='\0';
 323   if ((page.width == 0) || (page.height == 0))
 324     (void) ParseAbsoluteGeometry(PSPageGeometry,&page);
 325   if (image_info->page != (char *) NULL)
 326     (void) ParseAbsoluteGeometry(image_info->page,&page);
 327   (void) FormatLocaleString(density,MaxTextExtent,"%gx%g",
 328     image->x_resolution,image->y_resolution);
 329   page.width=(size_t) floor(page.width*image->x_resolution/delta.x+0.5);
 330   page.height=(size_t) floor(page.height*image->y_resolution/delta.y+
 331     0.5);
 332   (void) FormatLocaleString(options,MaxTextExtent,"-g%.20gx%.20g ",(double)
 333      page.width,(double) page.height);
 334   image=DestroyImage(image);
 335   read_info=CloneImageInfo(image_info);
 336   *read_info->magick='\0';
 337   if (read_info->number_scenes != 0)
 338     {
 339       if (read_info->number_scenes != 1)
 340         (void) FormatLocaleString(options,MaxTextExtent,"-dLastPage=%.20g",
 341           (double) (read_info->scene+read_info->number_scenes));
 342       else
 343         (void) FormatLocaleString(options,MaxTextExtent,
 344           "-dFirstPage=%.20g -dLastPage=%.20g",(double) read_info->scene+1,
 345           (double) (read_info->scene+read_info->number_scenes));
 346       read_info->number_scenes=0;
 347       if (read_info->scenes != (char *) NULL)
 348         *read_info->scenes='\0';
 349     }
 350   if (read_info->authenticate != (char *) NULL)
 351     (void) FormatLocaleString(options+strlen(options),MaxTextExtent,
 352       " -sPCLPassword=%s",read_info->authenticate);
 353   (void) CopyMagickString(filename,read_info->filename,MaxTextExtent);
 354   (void) AcquireUniqueFilename(read_info->filename);
 355   (void) FormatLocaleString(command,MaxTextExtent,
 356     GetDelegateCommands(delegate_info),
 357     read_info->antialias != MagickFalse ? 4 : 1,
 358     read_info->antialias != MagickFalse ? 4 : 1,density,options,
 359     read_info->filename,input_filename);
 360   status=SystemCommand(MagickFalse,read_info->verbose,command,exception) != 0 ?
 361     MagickTrue : MagickFalse;
 362   image=ReadImage(read_info,exception);
 363   (void) RelinquishUniqueFileResource(read_info->filename);
 364   (void) RelinquishUniqueFileResource(input_filename);
 365   read_info=DestroyImageInfo(read_info);
 366   if (image == (Image *) NULL)
 367     ThrowReaderException(DelegateError,"PCLDelegateFailed");
 368   if (LocaleCompare(image->magick,"BMP") == 0)
 369     {
 370       Image
 371         *cmyk_image;
 372
 373       cmyk_image=ConsolidateCMYKImages(image,&image->exception);
 374       if (cmyk_image != (Image *) NULL)
 375         {
 376           image=DestroyImageList(image);
 377           image=cmyk_image;
 378         }
 379     }
 380   do
 381   {
 382     (void) CopyMagickString(image->filename,filename,MaxTextExtent);
 383     image->page=page;
 384     next_image=SyncNextImageInList(image);
 385     if (next_image != (Image *) NULL)
 386       image=next_image;
 387   } while (next_image != (Image *) NULL);
 388   return(GetFirstImageInList(image));
 389 }
 390 \f
 391 /*
 392 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 393 %                                                                             %
 394 %                                                                             %
 395 %                                                                             %
 396 %   R e g i s t e r P C L I m a g e                                           %
 397 %                                                                             %
 398 %                                                                             %
 399 %                                                                             %
 400 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 401 %
 402 %  RegisterPCLImage() adds attributes for the PCL image format to
 403 %  the list of supported formats.  The attributes include the image format
 404 %  tag, a method to read and/or write the format, whether the format
 405 %  supports the saving of more than one frame to the i file or blob,
 406 %  whether the format supports native in-memory I/O, and a brief
 407 %  description of the format.
 408 %
 409 %  The format of the RegisterPCLImage method is:
 410 %
 411 %      size_t RegisterPCLImage(void)
 412 %
 413 */
 414 ModuleExport size_t RegisterPCLImage(void)
 415 {
 416   MagickInfo
 417     *entry;
 418
 419   entry=SetMagickInfo("PCL");
 420   entry->decoder=(DecodeImageHandler *) ReadPCLImage;
 421   entry->encoder=(EncodeImageHandler *) WritePCLImage;
 422   entry->magick=(IsImageFormatHandler *) IsPCL;
 423   entry->blob_support=MagickFalse;
 424   entry->seekable_stream=MagickTrue;
 425   entry->thread_support=EncoderThreadSupport;
 426   entry->description=ConstantString("Printer Control Language");
 427   entry->module=ConstantString("PCL");
 428   (void) RegisterMagickInfo(entry);
 429   return(MagickImageCoderSignature);
 430 }
 431 \f
 432 /*
 433 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 434 %                                                                             %
 435 %                                                                             %
 436 %                                                                             %
 437 %   U n r e g i s t e r P C L I m a g e                                       %
 438 %                                                                             %
 439 %                                                                             %
 440 %                                                                             %
 441 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 442 %
 443 %  UnregisterPCLImage() removes format registrations made by the PCL module
 444 %  from the list of supported formats.
 445 %
 446 %  The format of the UnregisterPCLImage method is:
 447 %
 448 %      UnregisterPCLImage(void)
 449 %
 450 */
 451 ModuleExport void UnregisterPCLImage(void)
 452 {
 453   (void) UnregisterMagickInfo("PCL");
 454 }
 455 \f
 456 /*
 457 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 458 %                                                                             %
 459 %                                                                             %
 460 %                                                                             %
 461 %   W r i t e P C L I m a g e                                                 %
 462 %                                                                             %
 463 %                                                                             %
 464 %                                                                             %
 465 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 466 %
 467 %  WritePCLImage() writes an image in the Page Control Language encoded
 468 %  image format.
 469 %
 470 %  The format of the WritePCLImage method is:
 471 %
 472 %      MagickBooleanType WritePCLImage(const ImageInfo *image_info,Image *image)
 473 %
 474 %  A description of each parameter follows.
 475 %
 476 %    o image_info: the image info.
 477 %
 478 %    o image:  The image.
 479 %
 480 */
 481
 482 static size_t PCLDeltaCompressImage(const size_t length,
 483   const unsigned char *previous_pixels,const unsigned char *pixels,
 484   unsigned char *compress_pixels)
 485 {
 486   int
 487     delta,
 488     j,
 489     replacement;
 490
 491   register ssize_t
 492     i,
 493     x;
 494
 495   register unsigned char
 496     *q;
 497
 498   q=compress_pixels;
 499   for (x=0; x < (ssize_t) length; )
 500   {
 501     j=0;
 502     for (i=0; x < (ssize_t) length; x++)
 503     {
 504       if (*pixels++ != *previous_pixels++)
 505         {
 506           i=1;
 507           break;
 508         }
 509       j++;
 510     }
 511     while (x < (ssize_t) length)
 512     {
 513       x++;
 514       if (*pixels == *previous_pixels)
 515         break;
 516       i++;
 517       previous_pixels++;
 518       pixels++;
 519     }
 520     if (i == 0)
 521       break;
 522     replacement=j >= 31 ? 31 : j;
 523     j-=replacement;
 524     delta=i >= 8 ? 8 : i;
 525     *q++=(unsigned char) (((delta-1) << 5) | replacement);
 526     if (replacement == 31)
 527       {
 528         for (replacement=255; j != 0; )
 529         {
 530           if (replacement > j)
 531             replacement=j;
 532           *q++=(unsigned char) replacement;
 533           j-=replacement;
 534         }
 535         if (replacement == 255)
 536           *q++='\0';
 537       }
 538     for (pixels-=i; i != 0; )
 539     {
 540       for (i-=delta; delta != 0; delta--)
 541         *q++=(*pixels++);
 542       if (i == 0)
 543         break;
 544       delta=i;
 545       if (i >= 8)
 546         delta=8;
 547       *q++=(unsigned char) ((delta-1) << 5);
 548     }
 549   }
 550   return((size_t) (q-compress_pixels));
 551 }
 552
 553 static size_t PCLPackbitsCompressImage(const size_t length,
 554   const unsigned char *pixels,unsigned char *compress_pixels)
 555 {
 556   int
 557     count;
 558
 559   register ssize_t
 560     x;
 561
 562   register unsigned char
 563     *q;
 564
 565   ssize_t
 566     j;
 567
 568   unsigned char
 569     packbits[128];
 570
 571   /*
 572     Compress pixels with Packbits encoding.
 573   */
 574   q=compress_pixels;
 575   for (x=(ssize_t) length; x != 0; )
 576   {
 577     switch (x)
 578     {
 579       case 1:
 580       {
 581         x--;
 582         *q++=0;
 583         *q++=(*pixels);
 584         break;
 585       }
 586       case 2:
 587       {
 588         x-=2;
 589         *q++=1;
 590         *q++=(*pixels);
 591         *q++=pixels[1];
 592         break;
 593       }
 594       case 3:
 595       {
 596         x-=3;
 597         if ((*pixels == *(pixels+1)) && (*(pixels+1) == *(pixels+2)))
 598           {
 599             *q++=(unsigned char) ((256-3)+1);
 600             *q++=(*pixels);
 601             break;
 602           }
 603         *q++=2;
 604         *q++=(*pixels);
 605         *q++=pixels[1];
 606         *q++=pixels[2];
 607         break;
 608       }
 609       default:
 610       {
 611         if ((*pixels == *(pixels+1)) && (*(pixels+1) == *(pixels+2)))
 612           {
 613             /*
 614               Packed run.
 615             */
 616             count=3;
 617             while (((ssize_t) count < x) && (*pixels == *(pixels+count)))
 618             {
 619               count++;
 620               if (count >= 127)
 621                 break;
 622             }
 623             x-=count;
 624             *q++=(unsigned char) ((256-count)+1);
 625             *q++=(*pixels);
 626             pixels+=count;
 627             break;
 628           }
 629         /*
 630           Literal run.
 631         */
 632         count=0;
 633         while ((*(pixels+count) != *(pixels+count+1)) ||
 634                (*(pixels+count+1) != *(pixels+count+2)))
 635         {
 636           packbits[count+1]=pixels[count];
 637           count++;
 638           if (((ssize_t) count >= (x-3)) || (count >= 127))
 639             break;
 640         }
 641         x-=count;
 642         *packbits=(unsigned char) (count-1);
 643         for (j=0; j <= (ssize_t) count; j++)
 644           *q++=packbits[j];
 645         pixels+=count;
 646         break;
 647       }
 648     }
 649   }
 650   *q++=128; /* EOD marker */
 651   return((size_t) (q-compress_pixels));
 652 }
 653
 654 static MagickBooleanType WritePCLImage(const ImageInfo *image_info,Image *image)
 655 {
 656   char
 657     buffer[MaxTextExtent];
 658
 659   const char
 660     *option;
 661
 662   MagickBooleanType
 663     status;
 664
 665   MagickOffsetType
 666     scene;
 667
 668   register const Quantum *p;
 669
 670   register ssize_t i, x;
 671
 672   register unsigned char *q;
 673
 674   size_t
 675     density,
 676     length,
 677     one,
 678     packets;
 679
 680   ssize_t
 681     y;
 682
 683   unsigned char
 684     bits_per_pixel,
 685     *compress_pixels,
 686     *pixels,
 687     *previous_pixels;
 688
 689   /*
 690     Open output image file.
 691   */
 692   assert(image_info != (const ImageInfo *) NULL);
 693   assert(image_info->signature == MagickSignature);
 694   assert(image != (Image *) NULL);
 695   assert(image->signature == MagickSignature);
 696   if (image->debug != MagickFalse)
 697     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
 698   status=OpenBlob(image_info,image,WriteBinaryBlobMode,&image->exception);
 699   if (status == MagickFalse)
 700     return(status);
 701   density=75;
 702   if (image_info->density != (char *) NULL)
 703     {
 704       GeometryInfo
 705         geometry;
 706
 707       (void) ParseGeometry(image_info->density,&geometry);
 708       density=(size_t) geometry.rho;
 709     }
 710   scene=0;
 711   one=1;
 712   do
 713   {
 714     if (IsRGBColorspace(image->colorspace) == MagickFalse)
 715       (void) TransformImageColorspace(image,RGBColorspace);
 716     /*
 717       Initialize the printer.
 718     */
 719     (void) WriteBlobString(image,"\033E");  /* printer reset */
 720     (void) WriteBlobString(image,"\033*r3F");  /* set presentation mode */
 721     (void) FormatLocaleString(buffer,MaxTextExtent,"\033*r%.20gs%.20gT",
 722       (double) image->columns,(double) image->rows);
 723     (void) WriteBlobString(image,buffer);
 724     (void) FormatLocaleString(buffer,MaxTextExtent,"\033*t%.20gR",(double)
 725       density);
 726     (void) WriteBlobString(image,buffer);
 727     (void) WriteBlobString(image,"\033&l0E");  /* top margin 0 */
 728     if (IsImageMonochrome(image,&image->exception) != MagickFalse)
 729       {
 730         /*
 731           Monochrome image: use default printer monochrome setup.
 732         */
 733         bits_per_pixel=1;
 734       }
 735     else
 736       if (image->storage_class == DirectClass)
 737         {
 738           /*
 739             DirectClass image.
 740           */
 741           bits_per_pixel=24;
 742           (void) WriteBlobString(image,"\033*v6W"); /* set color mode */
 743           (void) WriteBlobByte(image,0); /* RGB */
 744           (void) WriteBlobByte(image,3); /* direct by pixel */
 745           (void) WriteBlobByte(image,0); /* bits per index (ignored) */
 746           (void) WriteBlobByte(image,8); /* bits per red component */
 747           (void) WriteBlobByte(image,8); /* bits per green component */
 748           (void) WriteBlobByte(image,8); /* bits per blue component */
 749         }
 750       else
 751         {
 752           /*
 753             Colormapped image.
 754           */
 755           bits_per_pixel=8;
 756           (void) WriteBlobString(image,"\033*v6W"); /* set color mode... */
 757           (void) WriteBlobByte(image,0); /* RGB */
 758           (void) WriteBlobByte(image,1); /* indexed by pixel */
 759           (void) WriteBlobByte(image,bits_per_pixel); /* bits per index */
 760           (void) WriteBlobByte(image,8); /* bits per red component */
 761           (void) WriteBlobByte(image,8); /* bits per green component */
 762           (void) WriteBlobByte(image,8); /* bits per blue component */
 763           for (i=0; i < (ssize_t) image->colors; i++)
 764           {
 765             (void) FormatLocaleString(buffer,MaxTextExtent,
 766               "\033*v%da%db%dc%.20gI",
 767               ScaleQuantumToChar(image->colormap[i].red),
 768               ScaleQuantumToChar(image->colormap[i].green),
 769               ScaleQuantumToChar(image->colormap[i].blue),(double) i);
 770             (void) WriteBlobString(image,buffer);
 771           }
 772           for (one=1; i < (ssize_t) (one << bits_per_pixel); i++)
 773           {
 774             (void) FormatLocaleString(buffer,MaxTextExtent,"\033*v%.20gI",
 775               (double) i);
 776             (void) WriteBlobString(image,buffer);
 777           }
 778         }
 779     option=GetImageOption(image_info,"pcl:fit-to-page");
 780     if ((option != (const char *) NULL) &&
 781         (IsMagickTrue(option) != MagickFalse))
 782       (void) WriteBlobString(image,"\033*r3A");
 783     else
 784       (void) WriteBlobString(image,"\033*r1A");  /* start raster graphics */
 785     (void) WriteBlobString(image,"\033*b0Y");  /* set y offset */
 786     length=(image->columns*bits_per_pixel+7)/8;
 787     pixels=(unsigned char *) AcquireQuantumMemory(length+1,sizeof(*pixels));
 788     if (pixels == (unsigned char *) NULL)
 789       ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
 790     (void) ResetMagickMemory(pixels,0,(length+1)*sizeof(*pixels));
 791     compress_pixels=(unsigned char *) NULL;
 792     previous_pixels=(unsigned char *) NULL;
 793     switch (image->compression)
 794     {
 795       case NoCompression:
 796       {
 797         (void) FormatLocaleString(buffer,MaxTextExtent,"\033*b0M");
 798         (void) WriteBlobString(image,buffer);
 799         break;
 800       }
 801       case RLECompression:
 802       {
 803         compress_pixels=(unsigned char *) AcquireQuantumMemory(length+256,
 804           sizeof(*compress_pixels));
 805         if (compress_pixels == (unsigned char *) NULL)
 806           {
 807             pixels=(unsigned char *) RelinquishMagickMemory(pixels);
 808             ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
 809           }
 810         (void) ResetMagickMemory(compress_pixels,0,(length+256)*
 811           sizeof(*compress_pixels));
 812         (void) FormatLocaleString(buffer,MaxTextExtent,"\033*b2M");
 813         (void) WriteBlobString(image,buffer);
 814         break;
 815       }
 816       default:
 817       {
 818         compress_pixels=(unsigned char *) AcquireQuantumMemory(3*length+256,
 819           sizeof(*compress_pixels));
 820         if (compress_pixels == (unsigned char *) NULL)
 821           {
 822             pixels=(unsigned char *) RelinquishMagickMemory(pixels);
 823             ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
 824           }
 825         (void) ResetMagickMemory(compress_pixels,0,(3*length+256)*
 826           sizeof(*compress_pixels));
 827         previous_pixels=(unsigned char *) AcquireQuantumMemory(length+1,
 828           sizeof(*previous_pixels));
 829         if (previous_pixels == (unsigned char *) NULL)
 830           {
 831             compress_pixels=(unsigned char *) RelinquishMagickMemory(
 832               compress_pixels);
 833             pixels=(unsigned char *) RelinquishMagickMemory(pixels);
 834             ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
 835           }
 836         (void) ResetMagickMemory(previous_pixels,0,(length+1)*
 837           sizeof(*previous_pixels));
 838         (void) FormatLocaleString(buffer,MaxTextExtent,"\033*b3M");
 839         (void) WriteBlobString(image,buffer);
 840         break;
 841       }
 842     }
 843     for (y=0; y < (ssize_t) image->rows; y++)
 844     {
 845       p=GetVirtualPixels(image,0,y,image->columns,1,&image->exception);
 846       if (p == (const Quantum *) NULL)
 847         break;
 848       q=pixels;
 849       switch (bits_per_pixel)
 850       {
 851         case 1:
 852         {
 853           register unsigned char
 854             bit,
 855             byte;
 856
 857           /*
 858             Monochrome image.
 859           */
 860           bit=0;
 861           byte=0;
 862           for (x=0; x < (ssize_t) image->columns; x++)
 863           {
 864             byte<<=1;
 865             if (GetPixelIntensity(image,p) < ((MagickRealType) QuantumRange/2.0))
 866               byte|=0x01;
 867             bit++;
 868             if (bit == 8)
 869               {
 870                 *q++=byte;
 871                 bit=0;
 872                 byte=0;
 873               }
 874             p+=GetPixelChannels(image);
 875           }
 876           if (bit != 0)
 877             *q++=byte << (8-bit);
 878           break;
 879         }
 880         case 8:
 881         {
 882           /*
 883             Colormapped image.
 884           */
 885           for (x=0; x < (ssize_t) image->columns; x++)
 886           {
 887             *q++=(unsigned char) GetPixelIndex(image,p);
 888             p+=GetPixelChannels(image);
 889           }
 890           break;
 891         }
 892         case 24:
 893         case 32:
 894         {
 895           /*
 896             Truecolor image.
 897           */
 898           for (x=0; x < (ssize_t) image->columns; x++)
 899           {
 900             *q++=ScaleQuantumToChar(GetPixelRed(image,p));
 901             *q++=ScaleQuantumToChar(GetPixelGreen(image,p));
 902             *q++=ScaleQuantumToChar(GetPixelBlue(image,p));
 903             p+=GetPixelChannels(image);
 904           }
 905           break;
 906         }
 907       }
 908       switch (image->compression)
 909       {
 910         case NoCompression:
 911         {
 912           (void) FormatLocaleString(buffer,MaxTextExtent,"\033*b%.20gW",
 913             (double) length);
 914           (void) WriteBlobString(image,buffer);
 915           (void) WriteBlob(image,length,pixels);
 916           break;
 917         }
 918         case RLECompression:
 919         {
 920           packets=PCLPackbitsCompressImage(length,pixels,compress_pixels);
 921           (void) FormatLocaleString(buffer,MaxTextExtent,"\033*b%.20gW",
 922             (double) packets);
 923           (void) WriteBlobString(image,buffer);
 924           (void) WriteBlob(image,packets,compress_pixels);
 925           break;
 926         }
 927         default:
 928         {
 929           if (y == 0)
 930             for (i=0; i < (ssize_t) length; i++)
 931               previous_pixels[i]=(~pixels[i]);
 932           packets=PCLDeltaCompressImage(length,previous_pixels,pixels,
 933             compress_pixels);
 934           (void) FormatLocaleString(buffer,MaxTextExtent,"\033*b%.20gW",
 935             (double) packets);
 936           (void) WriteBlobString(image,buffer);
 937           (void) WriteBlob(image,packets,compress_pixels);
 938           (void) CopyMagickMemory(previous_pixels,pixels,length*
 939             sizeof(*pixels));
 940           break;
 941         }
 942       }
 943     }
 944     (void) WriteBlobString(image,"\033*rB");  /* end graphics */
 945     switch (image->compression)
 946     {
 947       case NoCompression:
 948         break;
 949       case RLECompression:
 950       {
 951         compress_pixels=(unsigned char *) RelinquishMagickMemory(
 952           compress_pixels);
 953         break;
 954       }
 955       default:
 956       {
 957         previous_pixels=(unsigned char *) RelinquishMagickMemory(
 958           previous_pixels);
 959         compress_pixels=(unsigned char *) RelinquishMagickMemory(
 960           compress_pixels);
 961         break;
 962       }
 963     }
 964     pixels=(unsigned char *) RelinquishMagickMemory(pixels);
 965     if (GetNextImageInList(image) == (Image *) NULL)
 966       break;
 967     image=SyncNextImageInList(image);
 968     status=SetImageProgress(image,SaveImagesTag,scene++,
 969       GetImageListLength(image));
 970     if (status == MagickFalse)
 971       break;
 972   } while (image_info->adjoin != MagickFalse);
 973   (void) WriteBlobString(image,"\033E");
 974   (void) CloseBlob(image);
 975   return(MagickTrue);
 976 }