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 %                                   Cristy                                    %
  17 %                                 July 1992                                   %
  18 %                                                                             %
  19 %                                                                             %
  20 %  Copyright 1999-2015 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/colorspace-private.h"
  50 #include "MagickCore/constitute.h"
  51 #include "MagickCore/decorate.h"
  52 #include "MagickCore/distort.h"
  53 #include "MagickCore/exception.h"
  54 #include "MagickCore/exception-private.h"
  55 #include "MagickCore/gem.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/montage.h"
  65 #include "MagickCore/pixel-accessor.h"
  66 #include "MagickCore/resize.h"
  67 #include "MagickCore/quantum-private.h"
  68 #include "MagickCore/static.h"
  69 #include "MagickCore/string_.h"
  70 #include "MagickCore/module.h"
  71 #include "MagickCore/transform.h"
  72 #include "MagickCore/utility.h"
  73 \f
  74 /*
  75   Forward declarations.
  76 */
  77 static MagickBooleanType
  78   WritePCDImage(const ImageInfo *,Image *,ExceptionInfo *);
  79 \f
  80 /*
  81 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  82 %                                                                             %
  83 %                                                                             %
  84 %                                                                             %
  85 %   D e c o d e I m a g e                                                     %
  86 %                                                                             %
  87 %                                                                             %
  88 %                                                                             %
  89 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  90 %
  91 %  DecodeImage recovers the Huffman encoded luminance and chrominance
  92 %  deltas.
  93 %
  94 %  The format of the DecodeImage method is:
  95 %
  96 %      MagickBooleanType DecodeImage(Image *image,unsigned char *luma,
  97 %        unsigned char *chroma1,unsigned char *chroma2)
  98 %
  99 %  A description of each parameter follows:
 100 %
 101 %    o image: the address of a structure of type Image.
 102 %
 103 %    o luma: the address of a character buffer that contains the
 104 %      luminance information.
 105 %
 106 %    o chroma1: the address of a character buffer that contains the
 107 %      chrominance information.
 108 %
 109 %    o chroma2: the address of a character buffer that contains the
 110 %      chrominance information.
 111 %
 112 */
 113 static MagickBooleanType DecodeImage(Image *image,unsigned char *luma,
 114   unsigned char *chroma1,unsigned char *chroma2,ExceptionInfo *exception)
 115 {
 116 #define IsSync(sum)  ((sum & 0xffffff00UL) == 0xfffffe00UL)
 117 #define PCDGetBits(n) \
 118 {  \
 119   sum=(sum << n) & 0xffffffff; \
 120   bits-=n; \
 121   while (bits <= 24) \
 122   { \
 123     if (p >= (buffer+0x800)) \
 124       { \
 125         count=ReadBlob(image,0x800,buffer); \
 126         p=buffer; \
 127       } \
 128     sum|=((unsigned int) (*p) << (24-bits)); \
 129     bits+=8; \
 130     p++; \
 131   } \
 132 }
 133
 134   typedef struct PCDTable
 135   {
 136     unsigned int
 137       length,
 138       sequence;
 139
 140     MagickStatusType
 141       mask;
 142
 143     unsigned char
 144       key;
 145   } PCDTable;
 146
 147   PCDTable
 148     *pcd_table[3];
 149
 150   register ssize_t
 151     i,
 152     j;
 153
 154   register PCDTable
 155     *r;
 156
 157   register unsigned char
 158     *p,
 159     *q;
 160
 161   size_t
 162     bits,
 163     length,
 164     plane,
 165     pcd_length[3],
 166     row,
 167     sum;
 168
 169   ssize_t
 170     count,
 171     quantum;
 172
 173   unsigned char
 174     *buffer;
 175
 176   /*
 177     Initialize Huffman tables.
 178   */
 179   assert(image != (const Image *) NULL);
 180   assert(image->signature == MagickSignature);
 181   if (image->debug != MagickFalse)
 182     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
 183   assert(luma != (unsigned char *) NULL);
 184   assert(chroma1 != (unsigned char *) NULL);
 185   assert(chroma2 != (unsigned char *) NULL);
 186   buffer=(unsigned char *) AcquireQuantumMemory(0x800,sizeof(*buffer));
 187   if (buffer == (unsigned char *) NULL)
 188     ThrowBinaryException(ResourceLimitError,"MemoryAllocationFailed",
 189       image->filename);
 190   sum=0;
 191   bits=32;
 192   p=buffer+0x800;
 193   for (i=0; i < 3; i++)
 194   {
 195     pcd_table[i]=(PCDTable *) NULL;
 196     pcd_length[i]=0;
 197   }
 198   for (i=0; i < (image->columns > 1536 ? 3 : 1); i++)
 199   {
 200     PCDGetBits(8);
 201     length=(sum & 0xff)+1;
 202     pcd_table[i]=(PCDTable *) AcquireQuantumMemory(length,
 203       sizeof(*pcd_table[i]));
 204     if (pcd_table[i] == (PCDTable *) NULL)
 205       {
 206         buffer=(unsigned char *) RelinquishMagickMemory(buffer);
 207         ThrowBinaryException(ResourceLimitError,"MemoryAllocationFailed",
 208           image->filename);
 209       }
 210     r=pcd_table[i];
 211     for (j=0; j < (ssize_t) length; j++)
 212     {
 213       PCDGetBits(8);
 214       r->length=(unsigned int) (sum & 0xff)+1;
 215       if (r->length > 16)
 216         {
 217           buffer=(unsigned char *) RelinquishMagickMemory(buffer);
 218           return(MagickFalse);
 219         }
 220       PCDGetBits(16);
 221       r->sequence=(unsigned int) (sum & 0xffff) << 16;
 222       PCDGetBits(8);
 223       r->key=(unsigned char) (sum & 0xff);
 224       r->mask=(~((1U << (32-r->length))-1));
 225       r++;
 226     }
 227     pcd_length[i]=(size_t) length;
 228   }
 229   /*
 230     Search for Sync byte.
 231   */
 232   for (i=0; i < 1; i++)
 233     PCDGetBits(16);
 234   for (i=0; i < 1; i++)
 235     PCDGetBits(16);
 236   while ((sum & 0x00fff000UL) != 0x00fff000UL)
 237     PCDGetBits(8);
 238   while (IsSync(sum) == 0)
 239     PCDGetBits(1);
 240   /*
 241     Recover the Huffman encoded luminance and chrominance deltas.
 242   */
 243   count=0;
 244   length=0;
 245   plane=0;
 246   row=0;
 247   q=luma;
 248   for ( ; ; )
 249   {
 250     if (IsSync(sum) != 0)
 251       {
 252         /*
 253           Determine plane and row number.
 254         */
 255         PCDGetBits(16);
 256         row=((sum >> 9) & 0x1fff);
 257         if (row == image->rows)
 258           break;
 259         PCDGetBits(8);
 260         plane=sum >> 30;
 261         PCDGetBits(16);
 262         switch (plane)
 263         {
 264           case 0:
 265           {
 266             q=luma+row*image->columns;
 267             count=(ssize_t) image->columns;
 268             break;
 269           }
 270           case 2:
 271           {
 272             q=chroma1+(row >> 1)*image->columns;
 273             count=(ssize_t) (image->columns >> 1);
 274             plane--;
 275             break;
 276           }
 277           case 3:
 278           {
 279             q=chroma2+(row >> 1)*image->columns;
 280             count=(ssize_t) (image->columns >> 1);
 281             plane--;
 282             break;
 283           }
 284           default:
 285           {
 286             ThrowBinaryException(CorruptImageError,"CorruptImage",
 287               image->filename);
 288           }
 289         }
 290         length=pcd_length[plane];
 291         continue;
 292       }
 293     /*
 294       Decode luminance or chrominance deltas.
 295     */
 296     r=pcd_table[plane];
 297     for (i=0; ((i < (ssize_t) length) && ((sum & r->mask) != r->sequence)); i++)
 298       r++;
 299     if ((row > image->rows) || (r == (PCDTable *) NULL))
 300       {
 301         (void) ThrowMagickException(exception,GetMagickModule(),
 302           CorruptImageWarning,"SkipToSyncByte","`%s'",image->filename);
 303         while ((sum & 0x00fff000) != 0x00fff000)
 304           PCDGetBits(8);
 305         while (IsSync(sum) == 0)
 306           PCDGetBits(1);
 307         continue;
 308       }
 309     if (r->key < 128)
 310       quantum=(ssize_t) (*q)+r->key;
 311     else
 312       quantum=(ssize_t) (*q)+r->key-256;
 313     *q=(unsigned char) ((quantum < 0) ? 0 : (quantum > 255) ? 255 : quantum);
 314     q++;
 315     PCDGetBits(r->length);
 316     count--;
 317   }
 318   /*
 319     Relinquish resources.
 320   */
 321   for (i=0; i < (image->columns > 1536 ? 3 : 1); i++)
 322     pcd_table[i]=(PCDTable *) RelinquishMagickMemory(pcd_table[i]);
 323   buffer=(unsigned char *) RelinquishMagickMemory(buffer);
 324   return(MagickTrue);
 325 }
 326 \f
 327 /*
 328 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 329 %                                                                             %
 330 %                                                                             %
 331 %                                                                             %
 332 %   I s P C D                                                                 %
 333 %                                                                             %
 334 %                                                                             %
 335 %                                                                             %
 336 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 337 %
 338 %  IsPCD() returns MagickTrue if the image format type, identified by the
 339 %  magick string, is PCD.
 340 %
 341 %  The format of the IsPCD method is:
 342 %
 343 %      MagickBooleanType IsPCD(const unsigned char *magick,const size_t length)
 344 %
 345 %  A description of each parameter follows:
 346 %
 347 %    o magick: compare image format pattern against these bytes.
 348 %
 349 %    o length: Specifies the length of the magick string.
 350 %
 351 */
 352 static MagickBooleanType IsPCD(const unsigned char *magick,const size_t length)
 353 {
 354   if (length < 2052)
 355     return(MagickFalse);
 356   if (LocaleNCompare((const char *) magick+2048,"PCD_",4) == 0)
 357     return(MagickTrue);
 358   return(MagickFalse);
 359 }
 360 \f
 361 /*
 362 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 363 %                                                                             %
 364 %                                                                             %
 365 %                                                                             %
 366 %   R e a d P C D I m a g e                                                   %
 367 %                                                                             %
 368 %                                                                             %
 369 %                                                                             %
 370 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 371 %
 372 %  ReadPCDImage() reads a Photo CD image file and returns it.  It
 373 %  allocates the memory necessary for the new Image structure and returns a
 374 %  pointer to the new image.  Much of the PCD decoder was derived from
 375 %  the program hpcdtoppm(1) by Hadmut Danisch.
 376 %
 377 %  The format of the ReadPCDImage method is:
 378 %
 379 %      image=ReadPCDImage(image_info)
 380 %
 381 %  A description of each parameter follows:
 382 %
 383 %    o image_info: the image info.
 384 %
 385 %    o exception: return any errors or warnings in this structure.
 386 %
 387 */
 388
 389 static inline size_t MagickMin(const size_t x,const size_t y)
 390 {
 391   if (x < y)
 392     return(x);
 393   return(y);
 394 }
 395
 396 static Image *OverviewImage(const ImageInfo *image_info,Image *image,
 397   ExceptionInfo *exception)
 398 {
 399   Image
 400     *montage_image;
 401
 402   MontageInfo
 403     *montage_info;
 404
 405   register Image
 406     *p;
 407
 408   /*
 409     Create the PCD Overview image.
 410   */
 411   for (p=image; p != (Image *) NULL; p=p->next)
 412   {
 413     (void) DeleteImageProperty(p,"label");
 414     (void) SetImageProperty(p,"label",DefaultTileLabel,exception);
 415   }
 416   montage_info=CloneMontageInfo(image_info,(MontageInfo *) NULL);
 417   (void) CopyMagickString(montage_info->filename,image_info->filename,
 418     MaxTextExtent);
 419   montage_image=MontageImageList(image_info,montage_info,image,exception);
 420   montage_info=DestroyMontageInfo(montage_info);
 421   if (montage_image == (Image *) NULL)
 422     ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 423   image=DestroyImage(image);
 424   return(montage_image);
 425 }
 426
 427 static void Upsample(const size_t width,const size_t height,
 428   const size_t scaled_width,unsigned char *pixels)
 429 {
 430   register ssize_t
 431     x,
 432     y;
 433
 434   register unsigned char
 435     *p,
 436     *q,
 437     *r;
 438
 439   /*
 440     Create a new image that is a integral size greater than an existing one.
 441   */
 442   assert(pixels != (unsigned char *) NULL);
 443   for (y=0; y < (ssize_t) height; y++)
 444   {
 445     p=pixels+(height-1-y)*scaled_width+(width-1);
 446     q=pixels+((height-1-y) << 1)*scaled_width+((width-1) << 1);
 447     *q=(*p);
 448     *(q+1)=(*(p));
 449     for (x=1; x < (ssize_t) width; x++)
 450     {
 451       p--;
 452       q-=2;
 453       *q=(*p);
 454       *(q+1)=(unsigned char) ((((size_t) *p)+((size_t) *(p+1))+1) >> 1);
 455     }
 456   }
 457   for (y=0; y < (ssize_t) (height-1); y++)
 458   {
 459     p=pixels+((size_t) y << 1)*scaled_width;
 460     q=p+scaled_width;
 461     r=q+scaled_width;
 462     for (x=0; x < (ssize_t) (width-1); x++)
 463     {
 464       *q=(unsigned char) ((((size_t) *p)+((size_t) *r)+1) >> 1);
 465       *(q+1)=(unsigned char) ((((size_t) *p)+((size_t) *(p+2))+
 466         ((size_t) *r)+((size_t) *(r+2))+2) >> 2);
 467       q+=2;
 468       p+=2;
 469       r+=2;
 470     }
 471     *q++=(unsigned char) ((((size_t) *p++)+((size_t) *r++)+1) >> 1);
 472     *q++=(unsigned char) ((((size_t) *p++)+((size_t) *r++)+1) >> 1);
 473   }
 474   p=pixels+(2*height-2)*scaled_width;
 475   q=pixels+(2*height-1)*scaled_width;
 476   (void) CopyMagickMemory(q,p,(size_t) (2*width));
 477 }
 478
 479 static Image *ReadPCDImage(const ImageInfo *image_info,ExceptionInfo *exception)
 480 {
 481   Image
 482     *image;
 483
 484   MagickBooleanType
 485     status;
 486
 487   MagickOffsetType
 488     offset;
 489
 490   MagickSizeType
 491     number_pixels;
 492
 493   register ssize_t
 494     i,
 495     y;
 496
 497   register Quantum
 498     *q;
 499
 500   register unsigned char
 501     *c1,
 502     *c2,
 503     *yy;
 504
 505   size_t
 506     height,
 507     number_images,
 508     rotate,
 509     scene,
 510     width;
 511
 512   ssize_t
 513     count,
 514     x;
 515
 516   unsigned char
 517     *chroma1,
 518     *chroma2,
 519     *header,
 520     *luma;
 521
 522   unsigned int
 523     overview;
 524
 525   /*
 526     Open image file.
 527   */
 528   assert(image_info != (const ImageInfo *) NULL);
 529   assert(image_info->signature == MagickSignature);
 530   if (image_info->debug != MagickFalse)
 531     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
 532       image_info->filename);
 533   assert(exception != (ExceptionInfo *) NULL);
 534   assert(exception->signature == MagickSignature);
 535   image=AcquireImage(image_info,exception);
 536   status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
 537   if (status == MagickFalse)
 538     {
 539       image=DestroyImageList(image);
 540       return((Image *) NULL);
 541     }
 542   /*
 543     Determine if this a PCD file.
 544   */
 545   header=(unsigned char *) AcquireQuantumMemory(0x800,3UL*sizeof(*header));
 546   if (header == (unsigned char *) NULL)
 547     ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 548   count=ReadBlob(image,3*0x800,header);
 549   overview=LocaleNCompare((char *) header,"PCD_OPA",7) == 0;
 550   if ((count == 0) ||
 551       ((LocaleNCompare((char *) header+0x800,"PCD",3) != 0) && (overview ==0)))
 552     ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 553   rotate=header[0x0e02] & 0x03;
 554   number_images=(header[10] << 8) | header[11];
 555   if (number_images > 65535)
 556     ThrowReaderException(CorruptImageError,"ImproperImageHeader");
 557   header=(unsigned char *) RelinquishMagickMemory(header);
 558   /*
 559     Determine resolution by scene specification.
 560   */
 561   if ((image->columns == 0) || (image->rows == 0))
 562     scene=3;
 563   else
 564     {
 565       width=192;
 566       height=128;
 567       for (scene=1; scene < 6; scene++)
 568       {
 569         if ((width >= image->columns) && (height >= image->rows))
 570           break;
 571         width<<=1;
 572         height<<=1;
 573       }
 574     }
 575   if (image_info->number_scenes != 0)
 576     scene=(size_t) MagickMin(image_info->scene,6);
 577   if (overview != 0)
 578     scene=1;
 579   /*
 580     Initialize image structure.
 581   */
 582   width=192;
 583   height=128;
 584   for (i=1; i < (ssize_t) MagickMin(scene,3); i++)
 585   {
 586     width<<=1;
 587     height<<=1;
 588   }
 589   image->columns=width;
 590   image->rows=height;
 591   image->depth=8;
 592   for ( ; i < (ssize_t) scene; i++)
 593   {
 594     image->columns<<=1;
 595     image->rows<<=1;
 596   }
 597   status=SetImageExtent(image,image->columns,image->rows,exception);
 598   if (status == MagickFalse)
 599     return(DestroyImageList(image));
 600   /*
 601     Allocate luma and chroma memory.
 602   */
 603   number_pixels=(MagickSizeType) image->columns*image->rows;
 604   if (number_pixels != (size_t) number_pixels)
 605     ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 606   chroma1=(unsigned char *) AcquireQuantumMemory(image->columns+1UL,image->rows*
 607     10*sizeof(*chroma1));
 608   chroma2=(unsigned char *) AcquireQuantumMemory(image->columns+1UL,image->rows*
 609     10*sizeof(*chroma2));
 610   luma=(unsigned char *) AcquireQuantumMemory(image->columns+1UL,image->rows*
 611     10*sizeof(*luma));
 612   if ((chroma1 == (unsigned char *) NULL) ||
 613       (chroma2 == (unsigned char *) NULL) || (luma == (unsigned char *) NULL))
 614     ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
 615   /*
 616     Advance to image data.
 617   */
 618   offset=93;
 619   if (overview != 0)
 620     offset=2;
 621   else
 622     if (scene == 2)
 623       offset=20;
 624     else
 625       if (scene <= 1)
 626         offset=1;
 627   for (i=0; i < (ssize_t) (offset*0x800); i++)
 628     (void) ReadBlobByte(image);
 629   if (overview != 0)
 630     {
 631       Image
 632         *overview_image;
 633
 634       MagickProgressMonitor
 635         progress_monitor;
 636
 637       register ssize_t
 638         j;
 639
 640       /*
 641         Read thumbnails from overview image.
 642       */
 643       for (j=1; j <= (ssize_t) number_images; j++)
 644       {
 645         progress_monitor=SetImageProgressMonitor(image,
 646           (MagickProgressMonitor) NULL,image->client_data);
 647         (void) FormatLocaleString(image->filename,MaxTextExtent,
 648           "images/img%04ld.pcd",(long) j);
 649         (void) FormatLocaleString(image->magick_filename,MaxTextExtent,
 650           "images/img%04ld.pcd",(long) j);
 651         image->scene=(size_t) j;
 652         image->columns=width;
 653         image->rows=height;
 654         image->depth=8;
 655         yy=luma;
 656         c1=chroma1;
 657         c2=chroma2;
 658         for (y=0; y < (ssize_t) height; y+=2)
 659         {
 660           count=ReadBlob(image,width,yy);
 661           yy+=image->columns;
 662           count=ReadBlob(image,width,yy);
 663           yy+=image->columns;
 664           count=ReadBlob(image,width >> 1,c1);
 665           c1+=image->columns;
 666           count=ReadBlob(image,width >> 1,c2);
 667           c2+=image->columns;
 668         }
 669         Upsample(image->columns >> 1,image->rows >> 1,image->columns,chroma1);
 670         Upsample(image->columns >> 1,image->rows >> 1,image->columns,chroma2);
 671         /*
 672           Transfer luminance and chrominance channels.
 673         */
 674         yy=luma;
 675         c1=chroma1;
 676         c2=chroma2;
 677         for (y=0; y < (ssize_t) image->rows; y++)
 678         {
 679           q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 680           if (q == (Quantum *) NULL)
 681             break;
 682           for (x=0; x < (ssize_t) image->columns; x++)
 683           {
 684             SetPixelRed(image,ScaleCharToQuantum(*yy++),q);
 685             SetPixelGreen(image,ScaleCharToQuantum(*c1++),q);
 686             SetPixelBlue(image,ScaleCharToQuantum(*c2++),q);
 687             q+=GetPixelChannels(image);
 688           }
 689           if (SyncAuthenticPixels(image,exception) == MagickFalse)
 690             break;
 691         }
 692         image->colorspace=YCCColorspace;
 693         if (LocaleCompare(image_info->magick,"PCDS") == 0)
 694           SetImageColorspace(image,sRGBColorspace,exception);
 695         if (j < (ssize_t) number_images)
 696           {
 697             /*
 698               Allocate next image structure.
 699             */
 700             AcquireNextImage(image_info,image,exception);
 701             if (GetNextImageInList(image) == (Image *) NULL)
 702               {
 703                 image=DestroyImageList(image);
 704                 return((Image *) NULL);
 705               }
 706             image=SyncNextImageInList(image);
 707           }
 708         (void) SetImageProgressMonitor(image,progress_monitor,
 709           image->client_data);
 710         if (image->previous == (Image *) NULL)
 711           {
 712             status=SetImageProgress(image,LoadImageTag,j-1,number_images);
 713             if (status == MagickFalse)
 714               break;
 715           }
 716       }
 717       chroma2=(unsigned char *) RelinquishMagickMemory(chroma2);
 718       chroma1=(unsigned char *) RelinquishMagickMemory(chroma1);
 719       luma=(unsigned char *) RelinquishMagickMemory(luma);
 720       image=GetFirstImageInList(image);
 721       overview_image=OverviewImage(image_info,image,exception);
 722       return(overview_image);
 723     }
 724   /*
 725     Read interleaved image.
 726   */
 727   yy=luma;
 728   c1=chroma1;
 729   c2=chroma2;
 730   for (y=0; y < (ssize_t) height; y+=2)
 731   {
 732     count=ReadBlob(image,width,yy);
 733     yy+=image->columns;
 734     count=ReadBlob(image,width,yy);
 735     yy+=image->columns;
 736     count=ReadBlob(image,width >> 1,c1);
 737     c1+=image->columns;
 738     count=ReadBlob(image,width >> 1,c2);
 739     c2+=image->columns;
 740   }
 741   if (scene >= 4)
 742     {
 743       /*
 744         Recover luminance deltas for 1536x1024 image.
 745       */
 746       Upsample(768,512,image->columns,luma);
 747       Upsample(384,256,image->columns,chroma1);
 748       Upsample(384,256,image->columns,chroma2);
 749       image->rows=1024;
 750       for (i=0; i < (4*0x800); i++)
 751         (void) ReadBlobByte(image);
 752       status=DecodeImage(image,luma,chroma1,chroma2,exception);
 753       if ((scene >= 5) && status)
 754         {
 755           /*
 756             Recover luminance deltas for 3072x2048 image.
 757           */
 758           Upsample(1536,1024,image->columns,luma);
 759           Upsample(768,512,image->columns,chroma1);
 760           Upsample(768,512,image->columns,chroma2);
 761           image->rows=2048;
 762           offset=TellBlob(image)/0x800+12;
 763           offset=SeekBlob(image,offset*0x800,SEEK_SET);
 764           status=DecodeImage(image,luma,chroma1,chroma2,exception);
 765           if ((scene >= 6) && (status != MagickFalse))
 766             {
 767               /*
 768                 Recover luminance deltas for 6144x4096 image (vaporware).
 769               */
 770               Upsample(3072,2048,image->columns,luma);
 771               Upsample(1536,1024,image->columns,chroma1);
 772               Upsample(1536,1024,image->columns,chroma2);
 773               image->rows=4096;
 774             }
 775         }
 776     }
 777   Upsample(image->columns >> 1,image->rows >> 1,image->columns,chroma1);
 778   Upsample(image->columns >> 1,image->rows >> 1,image->columns,chroma2);
 779   /*
 780     Transfer luminance and chrominance channels.
 781   */
 782   yy=luma;
 783   c1=chroma1;
 784   c2=chroma2;
 785   for (y=0; y < (ssize_t) image->rows; y++)
 786   {
 787     q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
 788     if (q == (Quantum *) NULL)
 789       break;
 790     for (x=0; x < (ssize_t) image->columns; x++)
 791     {
 792       SetPixelRed(image,ScaleCharToQuantum(*yy++),q);
 793       SetPixelGreen(image,ScaleCharToQuantum(*c1++),q);
 794       SetPixelBlue(image,ScaleCharToQuantum(*c2++),q);
 795       q+=GetPixelChannels(image);
 796     }
 797     if (SyncAuthenticPixels(image,exception) == MagickFalse)
 798       break;
 799     if (image->previous == (Image *) NULL)
 800       {
 801         status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
 802                 image->rows);
 803         if (status == MagickFalse)
 804           break;
 805       }
 806   }
 807   chroma2=(unsigned char *) RelinquishMagickMemory(chroma2);
 808   chroma1=(unsigned char *) RelinquishMagickMemory(chroma1);
 809   luma=(unsigned char *) RelinquishMagickMemory(luma);
 810   if (EOFBlob(image) != MagickFalse)
 811     ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
 812       image->filename);
 813   (void) CloseBlob(image);
 814   if (image_info->ping == MagickFalse)
 815     if ((rotate == 1) || (rotate == 3))
 816       {
 817         double
 818           degrees;
 819
 820         Image
 821           *rotate_image;
 822
 823         /*
 824           Rotate image.
 825         */
 826         degrees=rotate == 1 ? -90.0 : 90.0;
 827         rotate_image=RotateImage(image,degrees,exception);
 828         if (rotate_image != (Image *) NULL)
 829           {
 830             image=DestroyImage(image);
 831             image=rotate_image;
 832           }
 833       }
 834   /*
 835     Set CCIR 709 primaries with a D65 white point.
 836   */
 837   image->chromaticity.red_primary.x=0.6400f;
 838   image->chromaticity.red_primary.y=0.3300f;
 839   image->chromaticity.green_primary.x=0.3000f;
 840   image->chromaticity.green_primary.y=0.6000f;
 841   image->chromaticity.blue_primary.x=0.1500f;
 842   image->chromaticity.blue_primary.y=0.0600f;
 843   image->chromaticity.white_point.x=0.3127f;
 844   image->chromaticity.white_point.y=0.3290f;
 845   image->gamma=1.000f/2.200f;
 846   image->colorspace=YCCColorspace;
 847   if (LocaleCompare(image_info->magick,"PCDS") == 0)
 848     SetImageColorspace(image,sRGBColorspace,exception);
 849   return(GetFirstImageInList(image));
 850 }
 851 \f
 852 /*
 853 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 854 %                                                                             %
 855 %                                                                             %
 856 %                                                                             %
 857 %   R e g i s t e r P C D I m a g e                                           %
 858 %                                                                             %
 859 %                                                                             %
 860 %                                                                             %
 861 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 862 %
 863 %  RegisterPCDImage() adds attributes for the PCD image format to
 864 %  the list of supported formats.  The attributes include the image format
 865 %  tag, a method to read and/or write the format, whether the format
 866 %  supports the saving of more than one frame to the same file or blob,
 867 %  whether the format supports native in-memory I/O, and a brief
 868 %  description of the format.
 869 %
 870 %  The format of the RegisterPCDImage method is:
 871 %
 872 %      size_t RegisterPCDImage(void)
 873 %
 874 */
 875 ModuleExport size_t RegisterPCDImage(void)
 876 {
 877   MagickInfo
 878     *entry;
 879
 880   entry=SetMagickInfo("PCD");
 881   entry->decoder=(DecodeImageHandler *) ReadPCDImage;
 882   entry->encoder=(EncodeImageHandler *) WritePCDImage;
 883   entry->magick=(IsImageFormatHandler *) IsPCD;
 884   entry->adjoin=MagickFalse;
 885   entry->seekable_stream=MagickTrue;
 886   entry->description=ConstantString("Photo CD");
 887   entry->module=ConstantString("PCD");
 888   (void) RegisterMagickInfo(entry);
 889   entry=SetMagickInfo("PCDS");
 890   entry->decoder=(DecodeImageHandler *) ReadPCDImage;
 891   entry->encoder=(EncodeImageHandler *) WritePCDImage;
 892   entry->adjoin=MagickFalse;
 893   entry->seekable_stream=MagickTrue;
 894   entry->description=ConstantString("Photo CD");
 895   entry->module=ConstantString("PCD");
 896   (void) RegisterMagickInfo(entry);
 897   return(MagickImageCoderSignature);
 898 }
 899 \f
 900 /*
 901 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 902 %                                                                             %
 903 %                                                                             %
 904 %                                                                             %
 905 %   U n r e g i s t e r P C D I m a g e                                       %
 906 %                                                                             %
 907 %                                                                             %
 908 %                                                                             %
 909 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 910 %
 911 %  UnregisterPCDImage() removes format registrations made by the
 912 %  PCD module from the list of supported formats.
 913 %
 914 %  The format of the UnregisterPCDImage method is:
 915 %
 916 %      UnregisterPCDImage(void)
 917 %
 918 */
 919 ModuleExport void UnregisterPCDImage(void)
 920 {
 921   (void) UnregisterMagickInfo("PCD");
 922   (void) UnregisterMagickInfo("PCDS");
 923 }
 924 \f
 925 /*
 926 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 927 %                                                                             %
 928 %                                                                             %
 929 %                                                                             %
 930 %   W r i t e P C D I m a g e                                                 %
 931 %                                                                             %
 932 %                                                                             %
 933 %                                                                             %
 934 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 935 %
 936 %  WritePCDImage() writes an image in the Photo CD encoded image format.
 937 %
 938 %  The format of the WritePCDImage method is:
 939 %
 940 %      MagickBooleanType WritePCDImage(const ImageInfo *image_info,
 941 %        Image *image,ExceptionInfo *exception)
 942 %
 943 %  A description of each parameter follows.
 944 %
 945 %    o image_info: the image info.
 946 %
 947 %    o image:  The image.
 948 %
 949 %    o exception: return any errors or warnings in this structure.
 950 %
 951 */
 952
 953 static MagickBooleanType WritePCDTile(Image *image,const char *page_geometry,
 954   const char *tile_geometry,ExceptionInfo *exception)
 955 {
 956   GeometryInfo
 957     geometry_info;
 958
 959   Image
 960     *downsample_image,
 961     *tile_image;
 962
 963   MagickBooleanType
 964     status;
 965
 966   MagickStatusType
 967     flags;
 968
 969   RectangleInfo
 970     geometry;
 971
 972   register const Quantum
 973     *p,
 974     *q;
 975
 976   register ssize_t
 977     i,
 978     x;
 979
 980   ssize_t
 981     y;
 982
 983   /*
 984     Scale image to tile size.
 985   */
 986   SetGeometry(image,&geometry);
 987   (void) ParseMetaGeometry(page_geometry,&geometry.x,&geometry.y,
 988     &geometry.width,&geometry.height);
 989   if ((geometry.width % 2) != 0)
 990     geometry.width--;
 991   if ((geometry.height % 2) != 0)
 992     geometry.height--;
 993   tile_image=ResizeImage(image,geometry.width,geometry.height,TriangleFilter,
 994     exception);
 995   if (tile_image == (Image *) NULL)
 996     return(MagickFalse);
 997   flags=ParseGeometry(page_geometry,&geometry_info);
 998   geometry.width=(size_t) geometry_info.rho;
 999   geometry.height=(size_t) geometry_info.sigma;
1000   if ((flags & SigmaValue) == 0)
1001     geometry.height=geometry.width;
1002   if ((tile_image->columns != geometry.width) ||
1003       (tile_image->rows != geometry.height))
1004     {
1005       Image
1006         *bordered_image;
1007
1008       RectangleInfo
1009         border_info;
1010
1011       /*
1012         Put a border around the image.
1013       */
1014       border_info.width=(geometry.width-tile_image->columns+1) >> 1;
1015       border_info.height=(geometry.height-tile_image->rows+1) >> 1;
1016       bordered_image=BorderImage(tile_image,&border_info,image->compose,
1017         exception);
1018       if (bordered_image == (Image *) NULL)
1019         return(MagickFalse);
1020       tile_image=DestroyImage(tile_image);
1021       tile_image=bordered_image;
1022     }
1023   (void) TransformImage(&tile_image,(char *) NULL,tile_geometry,exception);
1024   (void) TransformImageColorspace(tile_image,YCCColorspace,exception);
1025   downsample_image=ResizeImage(tile_image,tile_image->columns/2,
1026     tile_image->rows/2,TriangleFilter,exception);
1027   if (downsample_image == (Image *) NULL)
1028     return(MagickFalse);
1029   /*
1030     Write tile to PCD file.
1031   */
1032   for (y=0; y < (ssize_t) tile_image->rows; y+=2)
1033   {
1034     p=GetVirtualPixels(tile_image,0,y,tile_image->columns,2,exception);
1035     if (p == (const Quantum *) NULL)
1036       break;
1037     for (x=0; x < (ssize_t) (tile_image->columns << 1); x++)
1038     {
1039       (void) WriteBlobByte(image,ScaleQuantumToChar(GetPixelRed(tile_image,p)));
1040       p+=GetPixelChannels(tile_image);
1041     }
1042     q=GetVirtualPixels(downsample_image,0,y >> 1,downsample_image->columns,1,
1043       exception);
1044     if (q == (Quantum *) NULL)
1045       break;
1046     for (x=0; x < (ssize_t) downsample_image->columns; x++)
1047     {
1048       (void) WriteBlobByte(image,ScaleQuantumToChar(
1049         GetPixelGreen(tile_image,q)));
1050       q++;
1051     }
1052     q=GetVirtualPixels(downsample_image,0,y >> 1,downsample_image->columns,1,
1053       exception);
1054     if (q == (Quantum *) NULL)
1055       break;
1056     for (x=0; x < (ssize_t) downsample_image->columns; x++)
1057     {
1058       (void) WriteBlobByte(image,ScaleQuantumToChar(
1059         GetPixelBlue(tile_image,q)));
1060       q++;
1061     }
1062     status=SetImageProgress(image,SaveImageTag,y,tile_image->rows);
1063     if (status == MagickFalse)
1064       break;
1065   }
1066   for (i=0; i < 0x800; i++)
1067     (void) WriteBlobByte(image,'\0');
1068   downsample_image=DestroyImage(downsample_image);
1069   tile_image=DestroyImage(tile_image);
1070   return(MagickTrue);
1071 }
1072
1073 static MagickBooleanType WritePCDImage(const ImageInfo *image_info,Image *image,
1074   ExceptionInfo *exception)
1075 {
1076   Image
1077     *pcd_image;
1078
1079   MagickBooleanType
1080     status;
1081
1082   register ssize_t
1083     i;
1084
1085   assert(image_info != (const ImageInfo *) NULL);
1086   assert(image_info->signature == MagickSignature);
1087   assert(image != (Image *) NULL);
1088   assert(image->signature == MagickSignature);
1089   if (image->debug != MagickFalse)
1090     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
1091   pcd_image=image;
1092   if (image->columns < image->rows)
1093     {
1094       Image
1095         *rotate_image;
1096
1097       /*
1098         Rotate portrait to landscape.
1099       */
1100       rotate_image=RotateImage(image,90.0,exception);
1101       if (rotate_image == (Image *) NULL)
1102         return(MagickFalse);
1103       pcd_image=rotate_image;
1104     }
1105   /*
1106     Open output image file.
1107   */
1108   status=OpenBlob(image_info,pcd_image,WriteBinaryBlobMode,exception);
1109   if (status == MagickFalse)
1110     return(status);
1111   if (IssRGBCompatibleColorspace(pcd_image->colorspace) == MagickFalse)
1112     (void) TransformImageColorspace(pcd_image,sRGBColorspace,exception);
1113   /*
1114     Write PCD image header.
1115   */
1116   for (i=0; i < 32; i++)
1117     (void) WriteBlobByte(pcd_image,0xff);
1118   for (i=0; i < 4; i++)
1119     (void) WriteBlobByte(pcd_image,0x0e);
1120   for (i=0; i < 8; i++)
1121     (void) WriteBlobByte(pcd_image,'\0');
1122   for (i=0; i < 4; i++)
1123     (void) WriteBlobByte(pcd_image,0x01);
1124   for (i=0; i < 4; i++)
1125     (void) WriteBlobByte(pcd_image,0x05);
1126   for (i=0; i < 8; i++)
1127     (void) WriteBlobByte(pcd_image,'\0');
1128   for (i=0; i < 4; i++)
1129     (void) WriteBlobByte(pcd_image,0x0A);
1130   for (i=0; i < 36; i++)
1131     (void) WriteBlobByte(pcd_image,'\0');
1132   for (i=0; i < 4; i++)
1133     (void) WriteBlobByte(pcd_image,0x01);
1134   for (i=0; i < 1944; i++)
1135     (void) WriteBlobByte(pcd_image,'\0');
1136   (void) WriteBlob(pcd_image,7,(const unsigned char *) "PCD_IPI");
1137   (void) WriteBlobByte(pcd_image,0x06);
1138   for (i=0; i < 1530; i++)
1139     (void) WriteBlobByte(pcd_image,'\0');
1140   if (image->columns < image->rows)
1141     (void) WriteBlobByte(pcd_image,'\1');
1142   else
1143     (void) WriteBlobByte(pcd_image,'\0');
1144   for (i=0; i < (3*0x800-1539); i++)
1145     (void) WriteBlobByte(pcd_image,'\0');
1146   /*
1147     Write PCD tiles.
1148   */
1149   status=WritePCDTile(pcd_image,"768x512>","192x128",exception);
1150   status=WritePCDTile(pcd_image,"768x512>","384x256",exception);
1151   status=WritePCDTile(pcd_image,"768x512>","768x512",exception);
1152   (void) CloseBlob(pcd_image);
1153   if (pcd_image != image)
1154     pcd_image=DestroyImage(pcd_image);
1155   return(status);
1156 }