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

   1 /*
   2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   3 %                                                                             %
   4 %                                                                             %
   5 %                                                                             %
   6 %                            PPPP    CCCC  DDDD                               %
   7 %                            P   P  C      D   D                              %
   8 %                            PPPP   C      D   D                              %
   9 %                            P      C      D   D                              %
  10 %                            P       CCCC  DDDD                               %
  11 %                                                                             %
  12 %                                                                             %
  13 %                     Read/Write Photo CD 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 "MagickCore/studio.h"
  43 #include "MagickCore/property.h"
  44 #include "MagickCore/blob.h"
  45 #include "MagickCore/blob-private.h"
  46 #include "MagickCore/cache.h"
  47 #include "MagickCore/client.h"
  48 #include "MagickCore/colorspace.h"
  49 #include "MagickCore/constitute.h"
  50 #include "MagickCore/decorate.h"
  51 #include "MagickCore/exception.h"
  52 #include "MagickCore/exception-private.h"
  53 #include "MagickCore/gem.h"
  54 #include "MagickCore/geometry.h"
  55 #include "MagickCore/image.h"
  56 #include "MagickCore/image-private.h"
  57 #include "MagickCore/list.h"
  58 #include "MagickCore/magick.h"
  59 #include "MagickCore/memory_.h"
  60 #include "MagickCore/monitor.h"
  61 #include "MagickCore/monitor-private.h"
  62 #include "MagickCore/montage.h"
  63 #include "MagickCore/pixel-accessor.h"
  64 #include "MagickCore/resize.h"
  65 #include "MagickCore/shear.h"
  66 #include "MagickCore/quantum-private.h"
  67 #include "MagickCore/static.h"
  68 #include "MagickCore/string_.h"
  69 #include "MagickCore/module.h"
  70 #include "MagickCore/transform.h"
  71 #include "MagickCore/utility.h"
  72 \f
  73 /*
  74   Forward declarations.
  75 */
  76 static MagickBooleanType
  77   WritePCDImage(const ImageInfo *,Image *);
  78 \f
  79 /*
  80 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  81 %                                                                             %
  82 %                                                                             %
  83 %                                                                             %
  84 %   D e c o d e I m a g e                                                     %
  85 %                                                                             %
  86 %                                                                             %
  87 %                                                                             %
  88 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  89 %
  90 %  DecodeImage recovers the Huffman encoded luminance and chrominance
  91 %  deltas.
  92 %
  93 %  The format of the DecodeImage method is:
  94 %
  95 %      MagickBooleanType DecodeImage(Image *image,unsigned char *luma,
  96 %        unsigned char *chroma1,unsigned char *chroma2)
  97 %
  98 %  A description of each parameter follows:
  99 %
 100 %    o image: the address of a structure of type Image.
 101 %
 102 %    o luma: the address of a character buffer that contains the
 103 %      luminance information.
 104 %
 105 %    o chroma1: the address of a character buffer that contains the
 106 %      chrominance information.
 107 %
 108 %    o chroma2: the address of a character buffer that contains the
 109 %      chrominance information.
 110 %
 111 */
 112 static MagickBooleanType DecodeImage(Image *image,unsigned char *luma,
 113   unsigned char *chroma1,unsigned char *chroma2)
 114 {
 115 #define IsSync  ((sum & 0xffffff00UL) == 0xfffffe00UL)
 116 #define PCDGetBits(n) \
 117 {  \
 118   sum=(sum << n) & 0xffffffff; \
 119   bits-=n; \
 120   while (bits <= 24) \
 121   { \
 122     if (p >= (buffer+0x800)) \
 123       { \
 124         count=ReadBlob(image,0x800,buffer); \
 125         p=buffer; \
 126       } \
 127     sum|=((unsigned int) (*p) << (24-bits)); \
 128     bits+=8; \
 129     p++; \
 130   } \
 131   if (EOFBlob(image) != MagickFalse) \
 132     break; \
 133 }
 134
 135   typedef struct PCDTable
 136   {
 137     unsigned int
 138       length,
 139       sequence;
 140
 141     MagickStatusType
 142       mask;
 143
 144     unsigned char
 145       key;
 146   } PCDTable;
 147
 148   PCDTable
 149     *pcd_table[3];
 150
 151   register ssize_t
 152     i,
 153     j;
 154
 155   register PCDTable
 156     *r;
 157
 158   register unsigned char
 159     *p,
 160     *q;
 161
 162   size_t
 163     bits,
 164     length,
 165     plane,
 166     pcd_length[3],
 167     row,
 168     sum;
 169
 170   ssize_t
 171     count,
 172     quantum;
 173
 174   unsigned char
 175     *buffer;
 176
 177   /*
 178     Initialize Huffman tables.
 179   */
 180   assert(image != (const Image *) NULL);
 181   assert(image->signature == MagickSignature);
 182   if (image->debug != MagickFalse)
 183     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
 184   assert(luma != (unsigned char *) NULL);
 185   assert(chroma1 != (unsigned char *) NULL);
 186   assert(chroma2 != (unsigned char *) NULL);
 187   buffer=(unsigned char *) AcquireQuantumMemory(0x800,sizeof(*buffer));
 188   if (buffer == (unsigned char *) NULL)
 189     ThrowBinaryException(ResourceLimitError,"MemoryAllocationFailed",
 190       image->filename);
 191   sum=0;
 192   bits=32;
 193   p=buffer+0x800;
 194   for (i=0; i < (image->columns > 1536 ? 3 : 1); i++)
 195   {
 196     PCDGetBits(8);
 197     length=(sum & 0xff)+1;
 198     pcd_table[i]=(PCDTable *) AcquireQuantumMemory(length,
 199       sizeof(*pcd_table[i]));
 200     if (pcd_table[i] == (PCDTable *) NULL)
 201       {
 202         buffer=(unsigned char *) RelinquishMagickMemory(buffer);
 203         ThrowBinaryException(ResourceLimitError,"MemoryAllocationFailed",
 204           image->filename);
 205       }
 206     r=pcd_table[i];
 207     for (j=0; j < (ssize_t) length; j++)
 208     {
 209       PCDGetBits(8);
 210       r->length=(unsigned int) (sum & 0xff)+1;
 211       if (r->length > 16)
 212         {
 213           buffer=(unsigned char *) RelinquishMagickMemory(buffer);
 214           return(MagickFalse);
 215         }
 216       PCDGetBits(16);
 217       r->sequence=(unsigned int) (sum & 0xffff) << 16;
 218       PCDGetBits(8);
 219       r->key=(unsigned char) (sum & 0xff);
 220       r->mask=(~((1U << (32-r->length))-1));
 221       r++;
 222     }
 223     pcd_length[i]=(size_t) length;
 224   }
 225   /*
 226     Search for Sync byte.
 227   */
 228   for (i=0; i < 1; i++)
 229     PCDGetBits(16);
 230   for (i=0; i < 1; i++)
 231     PCDGetBits(16);
 232   while ((sum & 0x00fff000UL) != 0x00fff000UL)
 233     PCDGetBits(8);
 234   while (IsSync == 0)
 235     PCDGetBits(1);
 236   /*
 237     Recover the Huffman encoded luminance and chrominance deltas.
 238   */
 239   count=0;
 240   length=0;
 241   plane=0;
 242   row=0;
 243   q=luma;
 244   for ( ; ; )
 245   {
 246     if (IsSync != 0)
 247       {
 248         /*
 249           Determine plane and row number.
 250         */
 251         PCDGetBits(16);
 252         row=((sum >> 9) & 0x1fff);
 253         if (row == image->rows)
 254           break;
 255         PCDGetBits(8);
 256         plane=sum >> 30;
 257         PCDGetBits(16);
 258         switch (plane)
 259         {
 260           case 0:
 261           {
 262             q=luma+row*image->columns;
 263             count=(ssize_t) image->columns;
 264             break;
 265           }
 266           case 2:
 267           {
 268             q=chroma1+(row >> 1)*image->columns;
 269             count=(ssize_t) (image->columns >> 1);
 270             plane--;
 271             break;
 272           }
 273           case 3:
 274           {
 275             q=chroma2+(row >> 1)*image->columns;
 276             count=(ssize_t) (image->columns >> 1);
 277             plane--;
 278             break;
 279           }
 280           default:
 281           {
 282             ThrowBinaryException(CorruptImageError,"CorruptImage",
 283               image->filename);
 284           }
 285         }
 286         length=pcd_length[plane];
 287         continue;
 288       }
 289     /*
 290       Decode luminance or chrominance deltas.
 291     */
 292     r=pcd_table[plane];
 293     for (i=0; ((i < (ssize_t) length) && ((sum & r->mask) != r->sequence)); i++)
 294       r++;
 295     if ((row > image->rows) || (r == (PCDTable *) NULL))
 296       {
 297         (void) ThrowMagickException(&image->exception,GetMagickModule(),
 298           CorruptImageWarning,"SkipToSyncByte","`%s'",image->filename);
 299         while ((sum & 0x00fff000) != 0x00fff000)
 300           PCDGetBits(8);
 301         while (IsSync == 0)
 302           PCDGetBits(1);
 303         continue;
 304       }
 305     if (r->key < 128)
 306       quantum=(ssize_t) (*q)+r->key;
 307     else
 308       quantum=(ssize_t) (*q)+r->key-256;
 309     *q=(unsigned char) ((quantum < 0) ? 0 : (quantum > 255) ? 255 : quantum);
 310     q++;
 311     PCDGetBits(r->length);
 312     count--;
 313   }
 314   /*
 315     Relinquish resources.
 316   */
 317   for (i=0; i < (image->columns > 1536 ? 3 : 1); i++)
 318     pcd_table[i]=(PCDTable *) RelinquishMagickMemory(pcd_table[i]);
 319   buffer=(unsigned char *) RelinquishMagickMemory(buffer);
 320   return(MagickTrue);
 321 }
 322 \f
 323 /*
 324 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 325 %                                                                             %
 326 %                                                                             %
 327 %                                                                             %
 328 %   I s P C D                                                                 %
 329 %                                                                             %
 330 %                                                                             %
 331 %                                                                             %
 332 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 333 %
 334 %  IsPCD() returns MagickTrue if the image format type, identified by the
 335 %  magick string, is PCD.
 336 %
 337 %  The format of the IsPCD method is:
 338 %
 339 %      MagickBooleanType IsPCD(const unsigned char *magick,const size_t length)
 340 %
 341 %  A description of each parameter follows:
 342 %
 343 %    o magick: compare image format pattern against these bytes.
 344 %
 345 %    o length: Specifies the length of the magick string.
 346 %
 347 */
 348 static MagickBooleanType IsPCD(const unsigned char *magick,const size_t length)
 349 {
 350   if (length < 2052)
 351     return(MagickFalse);
 352   if (LocaleNCompare((const char *) magick+2048,"PCD_",4) == 0)
 353     return(MagickTrue);
 354   return(MagickFalse);
 355 }
 356 \f
 357 /*
 358 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 359 %                                                                             %
 360 %                                                                             %
 361 %                                                                             %
 362 %   R e a d P C D I m a g e                                                   %
 363 %                                                                             %
 364 %                                                                             %
 365 %                                                                             %
 366 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 367 %
 368 %  ReadPCDImage() reads a Photo CD image file and returns it.  It
 369 %  allocates the memory necessary for the new Image structure and returns a
 370 %  pointer to the new image.  Much of the PCD decoder was derived from
 371 %  the program hpcdtoppm(1) by Hadmut Danisch.
 372 %
 373 %  The format of the ReadPCDImage method is:
 374 %
 375 %      image=ReadPCDImage(image_info)
 376 %
 377 %  A description of each parameter follows:
 378 %
 379 %    o image_info: the image info.
 380 %
 381 %    o exception: return any errors or warnings in this structure.
 382 %
 383 */
 384
 385 static inline size_t MagickMin(const size_t x,const size_t y)
 386 {
 387   if (x < y)
 388     return(x);
 389   return(y);
 390 }
 391
 392 static Image *OverviewImage(const ImageInfo *image_info,Image *image,
 393   ExceptionInfo *exception)
 394 {
 395   Image
 396     *montage_image;
 397
 398   MontageInfo
 399     *montage_info;
 400
 401   register Image
 402     *p;
 403
 404   /*
 405     Create the PCD Overview image.
 406   */
 407   for (p=image; p != (Image *) NULL; p=p->next)
 408   {
 409     (void) DeleteImageProperty(p,"label");
 410     (void) SetImageProperty(p,"label",DefaultTileLabel);
 411   }
 412   montage_info=CloneMontageInfo(image_info,(MontageInfo *) NULL);
 413   (void) CopyMagickString(montage_info->filename,image_info->filename,
 414     MaxTextExtent);
 415   montage_image=MontageImageList(image_info,montage_info,image,exception);
 416   montage_info=DestroyMontageInfo(montage_info);
 417   if (montage_image == (Image *) NULL)
 418     ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 419   image=DestroyImage(image);
 420   return(montage_image);
 421 }
 422
 423 static void Upsample(const size_t width,const size_t height,
 424   const size_t scaled_width,unsigned char *pixels)
 425 {
 426   register ssize_t
 427     x,
 428     y;
 429
 430   register unsigned char
 431     *p,
 432     *q,
 433     *r;
 434
 435   /*
 436     Create a new image that is a integral size greater than an existing one.
 437   */
 438   assert(pixels != (unsigned char *) NULL);
 439   for (y=0; y < (ssize_t) height; y++)
 440   {
 441     p=pixels+(height-1-y)*scaled_width+(width-1);
 442     q=pixels+((height-1-y) << 1)*scaled_width+((width-1) << 1);
 443     *q=(*p);
 444     *(q+1)=(*(p));
 445     for (x=1; x < (ssize_t) width; x++)
 446     {
 447       p--;
 448       q-=2;
 449       *q=(*p);
 450       *(q+1)=(unsigned char) ((((size_t) *p)+((size_t) *(p+1))+1) >> 1);
 451     }
 452   }
 453   for (y=0; y < (ssize_t) (height-1); y++)
 454   {
 455     p=pixels+((size_t) y << 1)*scaled_width;
 456     q=p+scaled_width;
 457     r=q+scaled_width;
 458     for (x=0; x < (ssize_t) (width-1); x++)
 459     {
 460       *q=(unsigned char) ((((size_t) *p)+((size_t) *r)+1) >> 1);
 461       *(q+1)=(unsigned char) ((((size_t) *p)+((size_t) *(p+2))+
 462         ((size_t) *r)+((size_t) *(r+2))+2) >> 2);
 463       q+=2;
 464       p+=2;
 465       r+=2;
 466     }
 467     *q++=(unsigned char) ((((size_t) *p++)+((size_t) *r++)+1) >> 1);
 468     *q++=(unsigned char) ((((size_t) *p++)+((size_t) *r++)+1) >> 1);
 469   }
 470   p=pixels+(2*height-2)*scaled_width;
 471   q=pixels+(2*height-1)*scaled_width;
 472   (void) CopyMagickMemory(q,p,(size_t) (2*width));
 473 }
 474
 475 static Image *ReadPCDImage(const ImageInfo *image_info,ExceptionInfo *exception)
 476 {
 477   Image
 478     *image;
 479
 480   MagickBooleanType
 481     status;
 482
 483   MagickOffsetType
 484     offset;
 485
 486   MagickSizeType
 487     number_pixels;
 488
 489   register ssize_t
 490     i,
 491     y;
 492
 493   register Quantum
 494     *q;
 495
 496   register unsigned char
 497     *c1,
 498     *c2,
 499     *yy;
 500
 501   size_t
 502     height,
 503     number_images,
 504     rotate,
 505     scene,
 506     width;
 507
 508   ssize_t
 509     count,
 510     x;
 511
 512   unsigned char
 513     *chroma1,
 514     *chroma2,
 515     *header,
 516     *luma;
 517
 518   unsigned int
 519     overview;
 520
 521   /*
 522     Open image file.
 523   */
 524   assert(image_info != (const ImageInfo *) NULL);
 525   assert(image_info->signature == MagickSignature);
 526   if (image_info->debug != MagickFalse)
 527     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
 528       image_info->filename);
 529   assert(exception != (ExceptionInfo *) NULL);
 530   assert(exception->signature == MagickSignature);
 531   image=AcquireImage(image_info);
 532   status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
 533   if (status == MagickFalse)
 534     {
 535       image=DestroyImageList(image);
 536       return((Image *) NULL);
 537     }
 538   /*
 539     Determine if this a PCD file.
 540   */
 541   header=(unsigned char *) AcquireQuantumMemory(0x800,3UL*sizeof(*header));
 542   if (header == (unsigned char *) NULL)
 543     ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 544   count=ReadBlob(image,3*0x800,header);
 545   overview=LocaleNCompare((char *) header,"PCD_OPA",7) == 0;
 546   if ((count == 0) ||
 547       ((LocaleNCompare((char *) header+0x800,"PCD",3) != 0) && !overview))
 548     ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 549   rotate=header[0x0e02] & 0x03;
 550   number_images=(header[10] << 8) | header[11];
 551   header=(unsigned char *) RelinquishMagickMemory(header);
 552   /*
 553     Determine resolution by scene specification.
 554   */
 555   if ((image->columns == 0) || (image->rows == 0))
 556     scene=3;
 557   else
 558     {
 559       width=192;
 560       height=128;
 561       for (scene=1; scene < 6; scene++)
 562       {
 563         if ((width >= image->columns) && (height >= image->rows))
 564           break;
 565         width<<=1;
 566         height<<=1;
 567       }
 568     }
 569   if (image_info->number_scenes != 0)
 570     scene=(size_t) MagickMin(image_info->scene,6);
 571   if (overview)
 572     scene=1;
 573   /*
 574     Initialize image structure.
 575   */
 576   width=192;
 577   height=128;
 578   for (i=1; i < (ssize_t) MagickMin(scene,3); i++)
 579   {
 580     width<<=1;
 581     height<<=1;
 582   }
 583   image->columns=width;
 584   image->rows=height;
 585   image->depth=8;
 586   for ( ; i < (ssize_t) scene; i++)
 587   {
 588     image->columns<<=1;
 589     image->rows<<=1;
 590   }
 591   /*
 592     Allocate luma and chroma memory.
 593   */
 594   number_pixels=(MagickSizeType) image->columns*image->rows;
 595   if (number_pixels != (size_t) number_pixels)
 596     ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 597   chroma1=(unsigned char *) AcquireQuantumMemory(image->columns+1UL,image->rows*
 598     sizeof(*chroma1));
 599   chroma2=(unsigned char *) AcquireQuantumMemory(image->columns+1UL,image->rows*
 600     sizeof(*chroma2));
 601   luma=(unsigned char *) AcquireQuantumMemory(image->columns+1UL,image->rows*
 602     sizeof(*luma));
 603   if ((chroma1 == (unsigned char *) NULL) ||
 604       (chroma2 == (unsigned char *) NULL) || (luma == (unsigned char *) NULL))
 605     ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 606   /*
 607     Advance to image data.
 608   */
 609   offset=93;
 610   if (overview)
 611     offset=2;
 612   else
 613     if (scene == 2)
 614       offset=20;
 615     else
 616       if (scene <= 1)
 617         offset=1;
 618   for (i=0; i < (ssize_t) (offset*0x800); i++)
 619     (void) ReadBlobByte(image);
 620   if (overview)
 621     {
 622       Image
 623         *overview_image;
 624
 625       MagickProgressMonitor
 626         progress_monitor;
 627
 628       register ssize_t
 629         j;
 630
 631       /*
 632         Read thumbnails from overview image.
 633       */
 634       for (j=1; j <= (ssize_t) number_images; j++)
 635       {
 636         progress_monitor=SetImageProgressMonitor(image,
 637           (MagickProgressMonitor) NULL,image->client_data);
 638         (void) FormatLocaleString(image->filename,MaxTextExtent,
 639           "images/img%04ld.pcd",(long) j);
 640         (void) FormatLocaleString(image->magick_filename,MaxTextExtent,
 641           "images/img%04ld.pcd",(long) j);
 642         image->scene=(size_t) j;
 643         image->columns=width;
 644         image->rows=height;
 645         image->depth=8;
 646         yy=luma;
 647         c1=chroma1;
 648         c2=chroma2;
 649         for (y=0; y < (ssize_t) height; y+=2)
 650         {
 651           count=ReadBlob(image,width,yy);
 652           yy+=image->columns;
 653           count=ReadBlob(image,width,yy);
 654           yy+=image->columns;
 655           count=ReadBlob(image,width >> 1,c1);
 656           c1+=image->columns;
 657           count=ReadBlob(image,width >> 1,c2);
 658           c2+=image->columns;
 659         }
 660         Upsample(image->columns >> 1,image->rows >> 1,image->columns,chroma1);
 661         Upsample(image->columns >> 1,image->rows >> 1,image->columns,chroma2);
 662         /*
 663           Transfer luminance and chrominance channels.
 664         */
 665         yy=luma;
 666         c1=chroma1;
 667         c2=chroma2;
 668         for (y=0; y < (ssize_t) image->rows; y++)
 669         {
 670           q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 671           if (q == (const Quantum *) NULL)
 672             break;
 673           for (x=0; x < (ssize_t) image->columns; x++)
 674           {
 675             SetPixelRed(image,ScaleCharToQuantum(*yy++),q);
 676             SetPixelGreen(image,ScaleCharToQuantum(*c1++),q);
 677             SetPixelBlue(image,ScaleCharToQuantum(*c2++),q);
 678             q+=GetPixelChannels(image);
 679           }
 680           if (SyncAuthenticPixels(image,exception) == MagickFalse)
 681             break;
 682         }
 683         image->colorspace=YCCColorspace;
 684         if (LocaleCompare(image_info->magick,"PCDS") == 0)
 685           image->colorspace=sRGBColorspace;
 686         if (j < (ssize_t) number_images)
 687           {
 688             /*
 689               Allocate next image structure.
 690             */
 691             AcquireNextImage(image_info,image);
 692             if (GetNextImageInList(image) == (Image *) NULL)
 693               {
 694                 image=DestroyImageList(image);
 695                 return((Image *) NULL);
 696               }
 697             image=SyncNextImageInList(image);
 698           }
 699         (void) SetImageProgressMonitor(image,progress_monitor,
 700           image->client_data);
 701         if (image->previous == (Image *) NULL)
 702           {
 703             status=SetImageProgress(image,LoadImageTag,j-1,number_images);
 704             if (status == MagickFalse)
 705               break;
 706           }
 707       }
 708       chroma2=(unsigned char *) RelinquishMagickMemory(chroma2);
 709       chroma1=(unsigned char *) RelinquishMagickMemory(chroma1);
 710       luma=(unsigned char *) RelinquishMagickMemory(luma);
 711       image=GetFirstImageInList(image);
 712       overview_image=OverviewImage(image_info,image,exception);
 713       return(overview_image);
 714     }
 715   /*
 716     Read interleaved image.
 717   */
 718   yy=luma;
 719   c1=chroma1;
 720   c2=chroma2;
 721   for (y=0; y < (ssize_t) height; y+=2)
 722   {
 723     count=ReadBlob(image,width,yy);
 724     yy+=image->columns;
 725     count=ReadBlob(image,width,yy);
 726     yy+=image->columns;
 727     count=ReadBlob(image,width >> 1,c1);
 728     c1+=image->columns;
 729     count=ReadBlob(image,width >> 1,c2);
 730     c2+=image->columns;
 731   }
 732   if (scene >= 4)
 733     {
 734       /*
 735         Recover luminance deltas for 1536x1024 image.
 736       */
 737       Upsample(768,512,image->columns,luma);
 738       Upsample(384,256,image->columns,chroma1);
 739       Upsample(384,256,image->columns,chroma2);
 740       image->rows=1024;
 741       for (i=0; i < (4*0x800); i++)
 742         (void) ReadBlobByte(image);
 743       status=DecodeImage(image,luma,chroma1,chroma2);
 744       if ((scene >= 5) && status)
 745         {
 746           /*
 747             Recover luminance deltas for 3072x2048 image.
 748           */
 749           Upsample(1536,1024,image->columns,luma);
 750           Upsample(768,512,image->columns,chroma1);
 751           Upsample(768,512,image->columns,chroma2);
 752           image->rows=2048;
 753           offset=TellBlob(image)/0x800+12;
 754           offset=SeekBlob(image,offset*0x800,SEEK_SET);
 755           status=DecodeImage(image,luma,chroma1,chroma2);
 756           if ((scene >= 6) && (status != MagickFalse))
 757             {
 758               /*
 759                 Recover luminance deltas for 6144x4096 image (vaporware).
 760               */
 761               Upsample(3072,2048,image->columns,luma);
 762               Upsample(1536,1024,image->columns,chroma1);
 763               Upsample(1536,1024,image->columns,chroma2);
 764               image->rows=4096;
 765             }
 766         }
 767     }
 768   Upsample(image->columns >> 1,image->rows >> 1,image->columns,chroma1);
 769   Upsample(image->columns >> 1,image->rows >> 1,image->columns,chroma2);
 770   /*
 771     Transfer luminance and chrominance channels.
 772   */
 773   yy=luma;
 774   c1=chroma1;
 775   c2=chroma2;
 776   for (y=0; y < (ssize_t) image->rows; y++)
 777   {
 778     q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 779     if (q == (const Quantum *) NULL)
 780       break;
 781     for (x=0; x < (ssize_t) image->columns; x++)
 782     {
 783       SetPixelRed(image,ScaleCharToQuantum(*yy++),q);
 784       SetPixelGreen(image,ScaleCharToQuantum(*c1++),q);
 785       SetPixelBlue(image,ScaleCharToQuantum(*c2++),q);
 786       q+=GetPixelChannels(image);
 787     }
 788     if (SyncAuthenticPixels(image,exception) == MagickFalse)
 789       break;
 790     if (image->previous == (Image *) NULL)
 791       {
 792         status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
 793                 image->rows);
 794         if (status == MagickFalse)
 795           break;
 796       }
 797   }
 798   chroma2=(unsigned char *) RelinquishMagickMemory(chroma2);
 799   chroma1=(unsigned char *) RelinquishMagickMemory(chroma1);
 800   luma=(unsigned char *) RelinquishMagickMemory(luma);
 801   if (EOFBlob(image) != MagickFalse)
 802     ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
 803       image->filename);
 804   (void) CloseBlob(image);
 805   if (image_info->ping == MagickFalse)
 806     if ((rotate == 1) || (rotate == 3))
 807       {
 808         double
 809           degrees;
 810
 811         Image
 812           *rotate_image;
 813
 814         /*
 815           Rotate image.
 816         */
 817         degrees=rotate == 1 ? -90.0 : 90.0;
 818         rotate_image=RotateImage(image,degrees,exception);
 819         if (rotate_image != (Image *) NULL)
 820           {
 821             image=DestroyImage(image);
 822             image=rotate_image;
 823           }
 824       }
 825   /*
 826     Set CCIR 709 primaries with a D65 white point.
 827   */
 828   image->chromaticity.red_primary.x=0.6400f;
 829   image->chromaticity.red_primary.y=0.3300f;
 830   image->chromaticity.green_primary.x=0.3000f;
 831   image->chromaticity.green_primary.y=0.6000f;
 832   image->chromaticity.blue_primary.x=0.1500f;
 833   image->chromaticity.blue_primary.y=0.0600f;
 834   image->chromaticity.white_point.x=0.3127f;
 835   image->chromaticity.white_point.y=0.3290f;
 836   image->gamma=1.000f/2.200f;
 837   image->colorspace=YCCColorspace;
 838   if (LocaleCompare(image_info->magick,"PCDS") == 0)
 839     image->colorspace=sRGBColorspace;
 840   return(GetFirstImageInList(image));
 841 }
 842 \f
 843 /*
 844 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 845 %                                                                             %
 846 %                                                                             %
 847 %                                                                             %
 848 %   R e g i s t e r P C D I m a g e                                           %
 849 %                                                                             %
 850 %                                                                             %
 851 %                                                                             %
 852 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 853 %
 854 %  RegisterPCDImage() adds attributes for the PCD image format to
 855 %  the list of supported formats.  The attributes include the image format
 856 %  tag, a method to read and/or write the format, whether the format
 857 %  supports the saving of more than one frame to the same file or blob,
 858 %  whether the format supports native in-memory I/O, and a brief
 859 %  description of the format.
 860 %
 861 %  The format of the RegisterPCDImage method is:
 862 %
 863 %      size_t RegisterPCDImage(void)
 864 %
 865 */
 866 ModuleExport size_t RegisterPCDImage(void)
 867 {
 868   MagickInfo
 869     *entry;
 870
 871   entry=SetMagickInfo("PCD");
 872   entry->decoder=(DecodeImageHandler *) ReadPCDImage;
 873   entry->encoder=(EncodeImageHandler *) WritePCDImage;
 874   entry->magick=(IsImageFormatHandler *) IsPCD;
 875   entry->adjoin=MagickFalse;
 876   entry->seekable_stream=MagickTrue;
 877   entry->description=ConstantString("Photo CD");
 878   entry->module=ConstantString("PCD");
 879   (void) RegisterMagickInfo(entry);
 880   entry=SetMagickInfo("PCDS");
 881   entry->decoder=(DecodeImageHandler *) ReadPCDImage;
 882   entry->encoder=(EncodeImageHandler *) WritePCDImage;
 883   entry->adjoin=MagickFalse;
 884   entry->seekable_stream=MagickTrue;
 885   entry->description=ConstantString("Photo CD");
 886   entry->module=ConstantString("PCD");
 887   (void) RegisterMagickInfo(entry);
 888   return(MagickImageCoderSignature);
 889 }
 890 \f
 891 /*
 892 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 893 %                                                                             %
 894 %                                                                             %
 895 %                                                                             %
 896 %   U n r e g i s t e r P C D I m a g e                                       %
 897 %                                                                             %
 898 %                                                                             %
 899 %                                                                             %
 900 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 901 %
 902 %  UnregisterPCDImage() removes format registrations made by the
 903 %  PCD module from the list of supported formats.
 904 %
 905 %  The format of the UnregisterPCDImage method is:
 906 %
 907 %      UnregisterPCDImage(void)
 908 %
 909 */
 910 ModuleExport void UnregisterPCDImage(void)
 911 {
 912   (void) UnregisterMagickInfo("PCD");
 913   (void) UnregisterMagickInfo("PCDS");
 914 }
 915 \f
 916 /*
 917 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 918 %                                                                             %
 919 %                                                                             %
 920 %                                                                             %
 921 %   W r i t e P C D I m a g e                                                 %
 922 %                                                                             %
 923 %                                                                             %
 924 %                                                                             %
 925 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 926 %
 927 %  WritePCDImage() writes an image in the Photo CD encoded image format.
 928 %
 929 %  The format of the WritePCDImage method is:
 930 %
 931 %      MagickBooleanType WritePCDImage(const ImageInfo *image_info,Image *image)
 932 %
 933 %  A description of each parameter follows.
 934 %
 935 %    o image_info: the image info.
 936 %
 937 %    o image:  The image.
 938 %
 939 */
 940
 941 static MagickBooleanType WritePCDTile(Image *image,const char *page_geometry,
 942   const char *tile_geometry)
 943 {
 944   GeometryInfo
 945     geometry_info;
 946
 947   Image
 948     *downsample_image,
 949     *tile_image;
 950
 951   MagickBooleanType
 952     status;
 953
 954   MagickStatusType
 955     flags;
 956
 957   RectangleInfo
 958     geometry;
 959
 960   register const Quantum
 961     *p,
 962     *q;
 963
 964   register ssize_t
 965     i,
 966     x;
 967
 968   ssize_t
 969     y;
 970
 971   /*
 972     Scale image to tile size.
 973   */
 974   SetGeometry(image,&geometry);
 975   (void) ParseMetaGeometry(page_geometry,&geometry.x,&geometry.y,
 976     &geometry.width,&geometry.height);
 977   if ((geometry.width % 2) != 0)
 978     geometry.width--;
 979   if ((geometry.height % 2) != 0)
 980     geometry.height--;
 981   tile_image=ResizeImage(image,geometry.width,geometry.height,TriangleFilter,
 982     1.0,&image->exception);
 983   if (tile_image == (Image *) NULL)
 984     return(MagickFalse);
 985   flags=ParseGeometry(page_geometry,&geometry_info);
 986   geometry.width=(size_t) geometry_info.rho;
 987   geometry.height=(size_t) geometry_info.sigma;
 988   if ((flags & SigmaValue) == 0)
 989     geometry.height=geometry.width;
 990   if ((tile_image->columns != geometry.width) ||
 991       (tile_image->rows != geometry.height))
 992     {
 993       Image
 994         *bordered_image;
 995
 996       RectangleInfo
 997         border_info;
 998
 999       /*
1000         Put a border around the image.
1001       */
1002       border_info.width=(geometry.width-tile_image->columns+1) >> 1;
1003       border_info.height=(geometry.height-tile_image->rows+1) >> 1;
1004       bordered_image=BorderImage(tile_image,&border_info,&image->exception);
1005       if (bordered_image == (Image *) NULL)
1006         return(MagickFalse);
1007       tile_image=DestroyImage(tile_image);
1008       tile_image=bordered_image;
1009     }
1010   (void) TransformImage(&tile_image,(char *) NULL,tile_geometry);
1011   if (image->colorspace != RGBColorspace)
1012     (void) TransformImageColorspace(tile_image,YCCColorspace);
1013   downsample_image=ResizeImage(tile_image,tile_image->columns/2,
1014     tile_image->rows/2,TriangleFilter,1.0,&image->exception);
1015   if (downsample_image == (Image *) NULL)
1016     return(MagickFalse);
1017   /*
1018     Write tile to PCD file.
1019   */
1020   for (y=0; y < (ssize_t) tile_image->rows; y+=2)
1021   {
1022     p=GetVirtualPixels(tile_image,0,y,tile_image->columns,2,
1023       &tile_image->exception);
1024     if (p == (const Quantum *) NULL)
1025       break;
1026     for (x=0; x < (ssize_t) (tile_image->columns << 1); x++)
1027     {
1028       (void) WriteBlobByte(image,ScaleQuantumToChar(GetPixelRed(tile_image,p)));
1029       p+=GetPixelChannels(tile_image);
1030     }
1031     q=GetVirtualPixels(downsample_image,0,y >> 1,downsample_image->columns,
1032       1,&downsample_image->exception);
1033     if (q == (const Quantum *) NULL)
1034       break;
1035     for (x=0; x < (ssize_t) downsample_image->columns; x++)
1036     {
1037       (void) WriteBlobByte(image,ScaleQuantumToChar(
1038         GetPixelGreen(tile_image,q)));
1039       q++;
1040     }
1041     q=GetVirtualPixels(downsample_image,0,y >> 1,downsample_image->columns,
1042       1,&downsample_image->exception);
1043     if (q == (const Quantum *) NULL)
1044       break;
1045     for (x=0; x < (ssize_t) downsample_image->columns; x++)
1046     {
1047       (void) WriteBlobByte(image,ScaleQuantumToChar(
1048         GetPixelBlue(tile_image,q)));
1049       q++;
1050     }
1051     status=SetImageProgress(image,SaveImageTag,y,tile_image->rows);
1052     if (status == MagickFalse)
1053       break;
1054   }
1055   for (i=0; i < 0x800; i++)
1056     (void) WriteBlobByte(image,'\0');
1057   downsample_image=DestroyImage(downsample_image);
1058   tile_image=DestroyImage(tile_image);
1059   return(MagickTrue);
1060 }
1061
1062 static MagickBooleanType WritePCDImage(const ImageInfo *image_info,Image *image)
1063 {
1064   Image
1065     *pcd_image;
1066
1067   MagickBooleanType
1068     status;
1069
1070   register ssize_t
1071     i;
1072
1073   assert(image_info != (const ImageInfo *) NULL);
1074   assert(image_info->signature == MagickSignature);
1075   assert(image != (Image *) NULL);
1076   assert(image->signature == MagickSignature);
1077   if (image->debug != MagickFalse)
1078     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
1079   pcd_image=image;
1080   if (image->columns < image->rows)
1081     {
1082       Image
1083         *rotate_image;
1084
1085       /*
1086         Rotate portrait to landscape.
1087       */
1088       rotate_image=RotateImage(image,90.0,&image->exception);
1089       if (rotate_image == (Image *) NULL)
1090         return(MagickFalse);
1091       pcd_image=rotate_image;
1092     }
1093   /*
1094     Open output image file.
1095   */
1096   status=OpenBlob(image_info,pcd_image,WriteBinaryBlobMode,&image->exception);
1097   if (status == MagickFalse)
1098     return(status);
1099   if (image->colorspace != RGBColorspace)
1100     (void) TransformImageColorspace(pcd_image,RGBColorspace);
1101   /*
1102     Write PCD image header.
1103   */
1104   for (i=0; i < 32; i++)
1105     (void) WriteBlobByte(pcd_image,0xff);
1106   for (i=0; i < 4; i++)
1107     (void) WriteBlobByte(pcd_image,0x0e);
1108   for (i=0; i < 8; i++)
1109     (void) WriteBlobByte(pcd_image,'\0');
1110   for (i=0; i < 4; i++)
1111     (void) WriteBlobByte(pcd_image,0x01);
1112   for (i=0; i < 4; i++)
1113     (void) WriteBlobByte(pcd_image,0x05);
1114   for (i=0; i < 8; i++)
1115     (void) WriteBlobByte(pcd_image,'\0');
1116   for (i=0; i < 4; i++)
1117     (void) WriteBlobByte(pcd_image,0x0A);
1118   for (i=0; i < 36; i++)
1119     (void) WriteBlobByte(pcd_image,'\0');
1120   for (i=0; i < 4; i++)
1121     (void) WriteBlobByte(pcd_image,0x01);
1122   for (i=0; i < 1944; i++)
1123     (void) WriteBlobByte(pcd_image,'\0');
1124   (void) WriteBlob(pcd_image,7,(const unsigned char *) "PCD_IPI");
1125   (void) WriteBlobByte(pcd_image,0x06);
1126   for (i=0; i < 1530; i++)
1127     (void) WriteBlobByte(pcd_image,'\0');
1128   if (image->columns < image->rows)
1129     (void) WriteBlobByte(pcd_image,'\1');
1130   else
1131     (void) WriteBlobByte(pcd_image,'\0');
1132   for (i=0; i < (3*0x800-1539); i++)
1133     (void) WriteBlobByte(pcd_image,'\0');
1134   /*
1135     Write PCD tiles.
1136   */
1137   status=WritePCDTile(pcd_image,"768x512>","192x128");
1138   status=WritePCDTile(pcd_image,"768x512>","384x256");
1139   status=WritePCDTile(pcd_image,"768x512>","768x512");
1140   (void) CloseBlob(pcd_image);
1141   if (pcd_image != image)
1142     pcd_image=DestroyImage(pcd_image);
1143   return(status);
1144 }