1 /*
2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3 % %
4 % %
5 % %
6 % PPPP DDDD BBBB %
7 % P P D D B B %
8 % PPPP D D BBBB %
9 % P D D B B %
10 % P DDDD BBBB %
11 % %
12 % %
13 % Read/Write Palm Database ImageViewer Image Format %
14 % %
15 % Software Design %
16 % Cristy %
17 % July 1992 %
18 % %
19 % %
20 % Copyright 1999-2019 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 % https://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 % 20071202 TS * rewrote RLE decoder - old version could cause buffer overflows
38 % * failure of RLE decoding now thows error RLEDecoderError
39 % * fixed bug in RLE decoding - now all rows are decoded, not just
40 % the first one
41 % * fixed bug in reader - record offsets now handled correctly
42 % * fixed bug in reader - only bits 0..2 indicate compression type
43 % * in writer: now using image color count instead of depth
44 */
45
46 /*
47 Include declarations.
48 */
49 #include "MagickCore/studio.h"
50 #include "MagickCore/attribute.h"
51 #include "MagickCore/blob.h"
52 #include "MagickCore/blob-private.h"
53 #include "MagickCore/cache.h"
54 #include "MagickCore/colormap-private.h"
55 #include "MagickCore/color-private.h"
56 #include "MagickCore/colormap.h"
57 #include "MagickCore/colorspace.h"
58 #include "MagickCore/colorspace-private.h"
59 #include "MagickCore/constitute.h"
60 #include "MagickCore/exception.h"
61 #include "MagickCore/exception-private.h"
62 #include "MagickCore/image.h"
63 #include "MagickCore/image-private.h"
64 #include "MagickCore/list.h"
65 #include "MagickCore/magick.h"
66 #include "MagickCore/memory_.h"
67 #include "MagickCore/monitor.h"
68 #include "MagickCore/monitor-private.h"
69 #include "MagickCore/pixel-accessor.h"
70 #include "MagickCore/property.h"
71 #include "MagickCore/quantum-private.h"
72 #include "MagickCore/quantum-private.h"
73 #include "MagickCore/static.h"
74 #include "MagickCore/string_.h"
75 #include "MagickCore/module.h"
76
77 /*
78 Typedef declarations.
79 */
80 typedef struct _PDBInfo
81 {
82 char
83 name[32];
84
85 short int
86 attributes,
87 version;
88
89 size_t
90 create_time,
91 modify_time,
92 archive_time,
93 modify_number,
94 application_info,
95 sort_info;
96
97 char
98 type[4], /* database type identifier "vIMG" */
99 id[4]; /* database creator identifier "View" */
100
101 size_t
102 seed,
103 next_record;
104
105 short int
106 number_records;
107 } PDBInfo;
108
109 typedef struct _PDBImage
110 {
111 char
112 name[32],
113 version;
114
115 size_t
116 reserved_1,
117 note;
118
119 short int
120 x_last,
121 y_last;
122
123 size_t
124 reserved_2;
125
126 short int
127 width,
128 height;
129
130 unsigned char
131 type;
132
133 unsigned short
134 x_anchor,
135 y_anchor;
136 } PDBImage;
137 /*
138 Forward declarations.
139 */
140 static MagickBooleanType
141 WritePDBImage(const ImageInfo *,Image *,ExceptionInfo *);
142
143 /*
144 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
145 % %
146 % %
147 % %
148 % D e c o d e I m a g e %
149 % %
150 % %
151 % %
152 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
153 %
154 % DecodeImage unpacks the packed image pixels into runlength-encoded
155 % pixel packets.
156 %
157 % The format of the DecodeImage method is:
158 %
159 % MagickBooleanType DecodeImage(Image *image,unsigned char *pixels,
160 % const size_t length)
161 %
162 % A description of each parameter follows:
163 %
164 % o image: the address of a structure of type Image.
165 %
166 % o pixels: The address of a byte (8 bits) array of pixel data created by
167 % the decoding process.
168 %
169 % o length: Number of bytes to read into buffer 'pixels'.
170 %
171 */
DecodeImage(Image * image,unsigned char * pixels,const size_t length)172 static MagickBooleanType DecodeImage(Image *image, unsigned char *pixels,
173 const size_t length)
174 {
175 #define RLE_MODE_NONE -1
176 #define RLE_MODE_COPY 0
177 #define RLE_MODE_RUN 1
178
179 int data = 0, count = 0;
180 unsigned char *p;
181 int mode = RLE_MODE_NONE;
182
183 for (p = pixels; p < pixels + length; p++) {
184 if (0 == count) {
185 data = ReadBlobByte( image );
186 if (-1 == data) return MagickFalse;
187 if (data > 128) {
188 mode = RLE_MODE_RUN;
189 count = data - 128 + 1;
190 data = ReadBlobByte( image );
191 if (-1 == data) return MagickFalse;
192 } else {
193 mode = RLE_MODE_COPY;
194 count = data + 1;
195 }
196 }
197
198 if (RLE_MODE_COPY == mode) {
199 data = ReadBlobByte( image );
200 if (-1 == data) return MagickFalse;
201 }
202 *p = (unsigned char)data;
203 --count;
204 }
205 return MagickTrue;
206 }
207
208 /*
209 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
210 % %
211 % %
212 % %
213 % I s P D B %
214 % %
215 % %
216 % %
217 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
218 %
219 % IsPDB() returns MagickTrue if the image format type, identified by the
220 % magick string, is PDB.
221 %
222 % The format of the ReadPDBImage method is:
223 %
224 % MagickBooleanType IsPDB(const unsigned char *magick,const size_t length)
225 %
226 % A description of each parameter follows:
227 %
228 % o magick: compare image format pattern against these bytes.
229 %
230 % o length: Specifies the length of the magick string.
231 %
232 */
IsPDB(const unsigned char * magick,const size_t length)233 static MagickBooleanType IsPDB(const unsigned char *magick,const size_t length)
234 {
235 if (length < 68)
236 return(MagickFalse);
237 if (memcmp(magick+60,"vIMGView",8) == 0)
238 return(MagickTrue);
239 return(MagickFalse);
240 }
241
242 /*
243 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
244 % %
245 % %
246 % %
247 % R e a d P D B I m a g e %
248 % %
249 % %
250 % %
251 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
252 %
253 % ReadPDBImage() reads an Pilot image file and returns it. It
254 % allocates the memory necessary for the new Image structure and returns a
255 % pointer to the new image.
256 %
257 % The format of the ReadPDBImage method is:
258 %
259 % Image *ReadPDBImage(const ImageInfo *image_info,ExceptionInfo *exception)
260 %
261 % A description of each parameter follows:
262 %
263 % o image_info: the image info.
264 %
265 % o exception: return any errors or warnings in this structure.
266 %
267 */
ReadPDBImage(const ImageInfo * image_info,ExceptionInfo * exception)268 static Image *ReadPDBImage(const ImageInfo *image_info,ExceptionInfo *exception)
269 {
270 unsigned char
271 attributes,
272 tag[3];
273
274 Image
275 *image;
276
277 MagickBooleanType
278 status;
279
280 PDBImage
281 pdb_image;
282
283 PDBInfo
284 pdb_info;
285
286 Quantum
287 index;
288
289 register ssize_t
290 x;
291
292 register Quantum
293 *q;
294
295 register unsigned char
296 *p;
297
298 size_t
299 bits_per_pixel,
300 num_pad_bytes,
301 one,
302 packets;
303
304 ssize_t
305 count,
306 img_offset,
307 comment_offset = 0,
308 y;
309
310 unsigned char
311 *pixels;
312
313 /*
314 Open image file.
315 */
316 assert(image_info != (const ImageInfo *) NULL);
317 assert(image_info->signature == MagickCoreSignature);
318 if (image_info->debug != MagickFalse)
319 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
320 image_info->filename);
321 assert(exception != (ExceptionInfo *) NULL);
322 assert(exception->signature == MagickCoreSignature);
323 image=AcquireImage(image_info,exception);
324 status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
325 if (status == MagickFalse)
326 {
327 image=DestroyImageList(image);
328 return((Image *) NULL);
329 }
330 /*
331 Determine if this a PDB image file.
332 */
333 (void) memset(&pdb_info,0,sizeof(pdb_info));
334 count=ReadBlob(image,sizeof(pdb_info.name),(unsigned char *) pdb_info.name);
335 if (count != sizeof(pdb_info.name))
336 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
337 pdb_info.attributes=(short) ReadBlobMSBShort(image);
338 pdb_info.version=(short) ReadBlobMSBShort(image);
339 pdb_info.create_time=ReadBlobMSBLong(image);
340 pdb_info.modify_time=ReadBlobMSBLong(image);
341 pdb_info.archive_time=ReadBlobMSBLong(image);
342 pdb_info.modify_number=ReadBlobMSBLong(image);
343 pdb_info.application_info=ReadBlobMSBLong(image);
344 pdb_info.sort_info=ReadBlobMSBLong(image);
345 (void) ReadBlob(image,4,(unsigned char *) pdb_info.type);
346 (void) ReadBlob(image,4,(unsigned char *) pdb_info.id);
347 pdb_info.seed=ReadBlobMSBLong(image);
348 pdb_info.next_record=ReadBlobMSBLong(image);
349 pdb_info.number_records=(short) ReadBlobMSBShort(image);
350 if ((memcmp(pdb_info.type,"vIMG",4) != 0) ||
351 (memcmp(pdb_info.id,"View",4) != 0))
352 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
353 if (pdb_info.next_record != 0)
354 ThrowReaderException(CoderError,"MultipleRecordListNotSupported");
355 /*
356 Read record header.
357 */
358 img_offset=(ssize_t) ReadBlobMSBSignedLong(image);
359 attributes=(unsigned char) ReadBlobByte(image);
360 (void) attributes;
361 count=ReadBlob(image,3,(unsigned char *) tag);
362 if (count != 3 || memcmp(tag,"\x6f\x80\x00",3) != 0)
363 ThrowReaderException(CorruptImageError,"CorruptImage");
364 if (pdb_info.number_records > 1)
365 {
366 comment_offset=(ssize_t) ReadBlobMSBSignedLong(image);
367 attributes=(unsigned char) ReadBlobByte(image);
368 count=ReadBlob(image,3,(unsigned char *) tag);
369 if (count != 3 || memcmp(tag,"\x6f\x80\x01",3) != 0)
370 ThrowReaderException(CorruptImageError,"CorruptImage");
371 }
372 num_pad_bytes = (size_t) (img_offset - TellBlob( image ));
373 while (num_pad_bytes-- != 0)
374 {
375 int
376 c;
377
378 c=ReadBlobByte(image);
379 if (c == EOF)
380 break;
381 }
382 /*
383 Read image header.
384 */
385 count=ReadBlob(image,sizeof(pdb_image.name),(unsigned char *) pdb_image.name);
386 if (count != sizeof(pdb_image.name))
387 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
388 pdb_image.version=ReadBlobByte(image);
389 pdb_image.type=(unsigned char) (ReadBlobByte(image));
390 pdb_image.reserved_1=ReadBlobMSBLong(image);
391 pdb_image.note=ReadBlobMSBLong(image);
392 pdb_image.x_last=(short) ReadBlobMSBShort(image);
393 pdb_image.y_last=(short) ReadBlobMSBShort(image);
394 pdb_image.reserved_2=ReadBlobMSBLong(image);
395 pdb_image.x_anchor=ReadBlobMSBShort(image);
396 pdb_image.y_anchor=ReadBlobMSBShort(image);
397 pdb_image.width=(short) ReadBlobMSBShort(image);
398 pdb_image.height=(short) ReadBlobMSBShort(image);
399 /*
400 Initialize image structure.
401 */
402 image->columns=(size_t) pdb_image.width;
403 image->rows=(size_t) pdb_image.height;
404 image->depth=8;
405 image->storage_class=PseudoClass;
406 bits_per_pixel=pdb_image.type == 0 ? 2UL : pdb_image.type == 2 ? 4UL : 1UL;
407 one=1;
408 if (AcquireImageColormap(image,one << bits_per_pixel,exception) == MagickFalse)
409 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
410 if (image_info->ping != MagickFalse)
411 {
412 (void) CloseBlob(image);
413 return(GetFirstImageInList(image));
414 }
415 status=SetImageExtent(image,image->columns,image->rows,exception);
416 if (status != MagickFalse)
417 status=ResetImagePixels(image,exception);
418 if (status == MagickFalse)
419 return(DestroyImageList(image));
420 packets=(bits_per_pixel*image->columns+7)/8;
421 pixels=(unsigned char *) AcquireQuantumMemory(packets+257UL,image->rows*
422 sizeof(*pixels));
423 if (pixels == (unsigned char *) NULL)
424 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
425 (void) memset(pixels,0,(packets+257UL)*image->rows*sizeof(*pixels));
426 switch (pdb_image.version & 0x07)
427 {
428 case 0:
429 {
430 image->compression=NoCompression;
431 count=(ssize_t) ReadBlob(image,packets*image->rows,pixels);
432 if (count != (ssize_t) (packets*image->rows))
433 {
434 pixels=(unsigned char *) RelinquishMagickMemory(pixels);
435 ThrowReaderException(CorruptImageError,"RLEDecoderError");
436 }
437 break;
438 }
439 case 1:
440 {
441 image->compression=RLECompression;
442 if (DecodeImage(image,pixels,packets*image->rows) == MagickFalse)
443 {
444 pixels=(unsigned char *) RelinquishMagickMemory(pixels);
445 ThrowReaderException(CorruptImageError,"RLEDecoderError");
446 }
447 break;
448 }
449 default:
450 {
451 pixels=(unsigned char *) RelinquishMagickMemory(pixels);
452 ThrowReaderException(CorruptImageError,
453 "UnrecognizedImageCompressionType");
454 }
455 }
456 p=pixels;
457 switch (bits_per_pixel)
458 {
459 case 1:
460 {
461 int
462 bit;
463
464 /*
465 Read 1-bit PDB image.
466 */
467 for (y=0; y < (ssize_t) image->rows; y++)
468 {
469 q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
470 if (q == (Quantum *) NULL)
471 break;
472 bit=0;
473 for (x=0; x < (ssize_t) image->columns; x++)
474 {
475 index=(Quantum) (*p & (0x80 >> bit) ? 0x00 : 0x01);
476 SetPixelIndex(image,index,q);
477 q+=GetPixelChannels(image);
478 bit++;
479 if (bit == 8)
480 {
481 p++;
482 bit=0;
483 }
484 }
485 if (SyncAuthenticPixels(image,exception) == MagickFalse)
486 break;
487 status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
488 image->rows);
489 if (status == MagickFalse)
490 break;
491 }
492 (void) SyncImage(image,exception);
493 break;
494 }
495 case 2:
496 {
497 unsigned int
498 shift;
499
500 /*
501 Read 2-bit PDB image.
502 */
503 for (y=0; y < (ssize_t) image->rows; y++)
504 {
505 q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
506 if (q == (Quantum *) NULL)
507 break;
508 shift=8;
509 for (x=0; x < (ssize_t) image->columns; x++)
510 {
511 shift-=2;
512 index=ConstrainColormapIndex(image,3UL-((*p >> shift) & 0x03),
513 exception);
514 SetPixelIndex(image,index,q);
515 q+=GetPixelChannels(image);
516 if (shift == 0)
517 {
518 shift=8;
519 p++;
520 }
521 }
522 if (SyncAuthenticPixels(image,exception) == MagickFalse)
523 break;
524 status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
525 image->rows);
526 if (status == MagickFalse)
527 break;
528 }
529 (void) SyncImage(image,exception);
530 break;
531 }
532 case 4:
533 {
534 unsigned int
535 shift;
536
537 /*
538 Read 4-bit PDB image.
539 */
540 for (y=0; y < (ssize_t) image->rows; y++)
541 {
542 q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
543 if (q == (Quantum *) NULL)
544 break;
545 shift=8;
546 for (x=0; x < (ssize_t) image->columns; x++)
547 {
548 shift-=4;
549 index=ConstrainColormapIndex(image,15UL-((*p >> shift) & 0x0f),
550 exception);
551 SetPixelIndex(image,index,q);
552 q+=GetPixelChannels(image);
553 if (shift == 0)
554 {
555 shift=8;
556 p++;
557 }
558 }
559 if (SyncAuthenticPixels(image,exception) == MagickFalse)
560 break;
561 status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
562 image->rows);
563 if (status == MagickFalse)
564 break;
565 }
566 (void) SyncImage(image,exception);
567 break;
568 }
569 default:
570 {
571 pixels=(unsigned char *) RelinquishMagickMemory(pixels);
572 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
573 }
574 }
575 pixels=(unsigned char *) RelinquishMagickMemory(pixels);
576 if (EOFBlob(image) != MagickFalse)
577 ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
578 image->filename);
579 if (pdb_info.number_records > 1)
580 {
581 char
582 *comment;
583
584 int
585 c;
586
587 register char
588 *p;
589
590 size_t
591 length;
592
593 num_pad_bytes = (size_t) (comment_offset - TellBlob( image ));
594 while (num_pad_bytes-- != 0)
595 {
596 int
597 c;
598
599 c=ReadBlobByte(image);
600 if (c == EOF)
601 break;
602 }
603
604 /*
605 Read comment.
606 */
607 c=ReadBlobByte(image);
608 length=MagickPathExtent;
609 comment=AcquireString((char *) NULL);
610 for (p=comment; c != EOF; p++)
611 {
612 if ((size_t) (p-comment+MagickPathExtent) >= length)
613 {
614 *p='\0';
615 length<<=1;
616 length+=MagickPathExtent;
617 comment=(char *) ResizeQuantumMemory(comment,length+
618 MagickPathExtent,sizeof(*comment));
619 if (comment == (char *) NULL)
620 break;
621 p=comment+strlen(comment);
622 }
623 *p=c;
624 c=ReadBlobByte(image);
625 }
626 *p='\0';
627 if (comment == (char *) NULL)
628 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
629 (void) SetImageProperty(image,"comment",comment,exception);
630 comment=DestroyString(comment);
631 }
632 (void) CloseBlob(image);
633 return(GetFirstImageInList(image));
634 }
635
636 /*
637 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
638 % %
639 % %
640 % %
641 % R e g i s t e r P D B I m a g e %
642 % %
643 % %
644 % %
645 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
646 %
647 % RegisterPDBImage() adds properties for the PDB image format to
648 % the list of supported formats. The properties include the image format
649 % tag, a method to read and/or write the format, whether the format
650 % supports the saving of more than one frame to the same file or blob,
651 % whether the format supports native in-memory I/O, and a brief
652 % description of the format.
653 %
654 % The format of the RegisterPDBImage method is:
655 %
656 % size_t RegisterPDBImage(void)
657 %
658 */
RegisterPDBImage(void)659 ModuleExport size_t RegisterPDBImage(void)
660 {
661 MagickInfo
662 *entry;
663
664 entry=AcquireMagickInfo("PDB","PDB","Palm Database ImageViewer Format");
665 entry->decoder=(DecodeImageHandler *) ReadPDBImage;
666 entry->encoder=(EncodeImageHandler *) WritePDBImage;
667 entry->magick=(IsImageFormatHandler *) IsPDB;
668 (void) RegisterMagickInfo(entry);
669 return(MagickImageCoderSignature);
670 }
671
672 /*
673 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
674 % %
675 % %
676 % %
677 % U n r e g i s t e r P D B I m a g e %
678 % %
679 % %
680 % %
681 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
682 %
683 % UnregisterPDBImage() removes format registrations made by the
684 % PDB module from the list of supported formats.
685 %
686 % The format of the UnregisterPDBImage method is:
687 %
688 % UnregisterPDBImage(void)
689 %
690 */
UnregisterPDBImage(void)691 ModuleExport void UnregisterPDBImage(void)
692 {
693 (void) UnregisterMagickInfo("PDB");
694 }
695
696 /*
697 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
698 % %
699 % %
700 % %
701 % W r i t e P D B I m a g e %
702 % %
703 % %
704 % %
705 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
706 %
707 % WritePDBImage() writes an image
708 %
709 % The format of the WritePDBImage method is:
710 %
711 % MagickBooleanType WritePDBImage(const ImageInfo *image_info,
712 % Image *image,ExceptionInfo *exception)
713 %
714 % A description of each parameter follows.
715 %
716 % o image_info: the image info.
717 %
718 % o image: The image.
719 %
720 % o exception: return any errors or warnings in this structure.
721 %
722 */
723
EncodeRLE(unsigned char * destination,unsigned char * source,size_t literal,size_t repeat)724 static unsigned char *EncodeRLE(unsigned char *destination,
725 unsigned char *source,size_t literal,size_t repeat)
726 {
727 if (literal > 0)
728 *destination++=(unsigned char) (literal-1);
729 (void) memcpy(destination,source,literal);
730 destination+=literal;
731 if (repeat > 0)
732 {
733 *destination++=(unsigned char) (0x80 | (repeat-1));
734 *destination++=source[literal];
735 }
736 return(destination);
737 }
738
WritePDBImage(const ImageInfo * image_info,Image * image,ExceptionInfo * exception)739 static MagickBooleanType WritePDBImage(const ImageInfo *image_info,Image *image,
740 ExceptionInfo *exception)
741 {
742 const char
743 *comment;
744
745 int
746 bits;
747
748 MagickBooleanType
749 status;
750
751 PDBImage
752 pdb_image;
753
754 PDBInfo
755 pdb_info;
756
757 QuantumInfo
758 *quantum_info;
759
760 register const Quantum
761 *p;
762
763 register ssize_t
764 x;
765
766 register unsigned char
767 *q;
768
769 size_t
770 bits_per_pixel,
771 literal,
772 packets,
773 packet_size,
774 repeat;
775
776 ssize_t
777 y;
778
779 unsigned char
780 *buffer,
781 *runlength,
782 *scanline;
783
784 /*
785 Open output image file.
786 */
787 assert(image_info != (const ImageInfo *) NULL);
788 assert(image_info->signature == MagickCoreSignature);
789 assert(image != (Image *) NULL);
790 assert(image->signature == MagickCoreSignature);
791 if (image->debug != MagickFalse)
792 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
793 assert(exception != (ExceptionInfo *) NULL);
794 assert(exception->signature == MagickCoreSignature);
795 status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
796 if (status == MagickFalse)
797 return(status);
798 (void) TransformImageColorspace(image,sRGBColorspace,exception);
799 if (SetImageMonochrome(image,exception) != MagickFalse) {
800 bits_per_pixel=1;
801 } else if (image->colors <= 4) {
802 bits_per_pixel=2;
803 } else if (image->colors <= 8) {
804 bits_per_pixel=3;
805 } else {
806 bits_per_pixel=4;
807 }
808 (void) memset(&pdb_info,0,sizeof(pdb_info));
809 (void) memset(&pdb_image,0,sizeof(pdb_image));
810 (void) CopyMagickString(pdb_info.name,image_info->filename,
811 sizeof(pdb_info.name));
812 pdb_info.attributes=0;
813 pdb_info.version=0;
814 pdb_info.create_time=time(NULL);
815 pdb_info.modify_time=pdb_info.create_time;
816 pdb_info.archive_time=0;
817 pdb_info.modify_number=0;
818 pdb_info.application_info=0;
819 pdb_info.sort_info=0;
820 (void) memcpy(pdb_info.type,"vIMG",4);
821 (void) memcpy(pdb_info.id,"View",4);
822 pdb_info.seed=0;
823 pdb_info.next_record=0;
824 comment=GetImageProperty(image,"comment",exception);
825 pdb_info.number_records=(comment == (const char *) NULL ? 1 : 2);
826 (void) WriteBlob(image,sizeof(pdb_info.name),(unsigned char *) pdb_info.name);
827 (void) WriteBlobMSBShort(image,(unsigned short) pdb_info.attributes);
828 (void) WriteBlobMSBShort(image,(unsigned short) pdb_info.version);
829 (void) WriteBlobMSBLong(image,(unsigned int) pdb_info.create_time);
830 (void) WriteBlobMSBLong(image,(unsigned int) pdb_info.modify_time);
831 (void) WriteBlobMSBLong(image,(unsigned int) pdb_info.archive_time);
832 (void) WriteBlobMSBLong(image,(unsigned int) pdb_info.modify_number);
833 (void) WriteBlobMSBLong(image,(unsigned int) pdb_info.application_info);
834 (void) WriteBlobMSBLong(image,(unsigned int) pdb_info.sort_info);
835 (void) WriteBlob(image,4,(unsigned char *) pdb_info.type);
836 (void) WriteBlob(image,4,(unsigned char *) pdb_info.id);
837 (void) WriteBlobMSBLong(image,(unsigned int) pdb_info.seed);
838 (void) WriteBlobMSBLong(image,(unsigned int) pdb_info.next_record);
839 (void) WriteBlobMSBShort(image,(unsigned short) pdb_info.number_records);
840 (void) CopyMagickString(pdb_image.name,pdb_info.name,sizeof(pdb_image.name));
841 pdb_image.version=1; /* RLE Compressed */
842 switch (bits_per_pixel)
843 {
844 case 1: pdb_image.type=(unsigned char) 0xff; break; /* monochrome */
845 case 2: pdb_image.type=(unsigned char) 0x00; break; /* 2 bit gray */
846 default: pdb_image.type=(unsigned char) 0x02; /* 4 bit gray */
847 }
848 pdb_image.reserved_1=0;
849 pdb_image.note=0;
850 pdb_image.x_last=0;
851 pdb_image.y_last=0;
852 pdb_image.reserved_2=0;
853 pdb_image.x_anchor=(unsigned short) 0xffff;
854 pdb_image.y_anchor=(unsigned short) 0xffff;
855 pdb_image.width=(short) image->columns;
856 if (image->columns % 16)
857 pdb_image.width=(short) (16*(image->columns/16+1));
858 pdb_image.height=(short) image->rows;
859 packets=((bits_per_pixel*image->columns+7)/8);
860 packet_size=(size_t) (image->depth > 8 ? 2 : 1);
861 runlength=(unsigned char *) AcquireQuantumMemory(9UL*packets,
862 image->rows*sizeof(*runlength));
863 buffer=(unsigned char *) AcquireQuantumMemory(512,sizeof(*buffer));
864 scanline=(unsigned char *) AcquireQuantumMemory(image->columns,packet_size*
865 sizeof(*scanline));
866 if ((runlength == (unsigned char *) NULL) ||
867 (buffer == (unsigned char *) NULL) ||
868 (scanline == (unsigned char *) NULL))
869 {
870 if (runlength != (unsigned char *) NULL)
871 runlength=(unsigned char *) RelinquishMagickMemory(runlength);
872 if (buffer != (unsigned char *) NULL)
873 buffer=(unsigned char *) RelinquishMagickMemory(buffer);
874 if (scanline != (unsigned char *) NULL)
875 scanline=(unsigned char *) RelinquishMagickMemory(scanline);
876 ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
877 }
878 (void) memset(buffer,0,512*sizeof(*buffer));
879 if (IssRGBCompatibleColorspace(image->colorspace) == MagickFalse)
880 (void) TransformImageColorspace(image,sRGBColorspace,exception);
881 /*
882 Convert to GRAY raster scanline.
883 */
884 quantum_info=AcquireQuantumInfo(image_info,image);
885 if (quantum_info == (QuantumInfo *) NULL)
886 {
887 if (runlength != (unsigned char *) NULL)
888 runlength=(unsigned char *) RelinquishMagickMemory(runlength);
889 if (buffer != (unsigned char *) NULL)
890 buffer=(unsigned char *) RelinquishMagickMemory(buffer);
891 if (scanline != (unsigned char *) NULL)
892 scanline=(unsigned char *) RelinquishMagickMemory(scanline);
893 ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
894 }
895 status=SetQuantumDepth(image,quantum_info,image->depth > 8 ? 16 : 8);
896 bits=8/(int) bits_per_pixel-1; /* start at most significant bits */
897 literal=0;
898 repeat=0;
899 q=runlength;
900 buffer[0]=0x00;
901 for (y=0; y < (ssize_t) image->rows; y++)
902 {
903 p=GetVirtualPixels(image,0,y,image->columns,1,exception);
904 if (p == (const Quantum *) NULL)
905 break;
906 (void) ExportQuantumPixels(image,(CacheView *) NULL,quantum_info,
907 GrayQuantum,scanline,exception);
908 for (x=0; x < (ssize_t) pdb_image.width; x++)
909 {
910 if (x < (ssize_t) image->columns)
911 buffer[literal+repeat]|=(0xff-scanline[x*packet_size]) >>
912 (8-bits_per_pixel) << bits*bits_per_pixel;
913 bits--;
914 if (bits < 0)
915 {
916 if (((literal+repeat) > 0) &&
917 (buffer[literal+repeat] == buffer[literal+repeat-1]))
918 {
919 if (repeat == 0)
920 {
921 literal--;
922 repeat++;
923 }
924 repeat++;
925 if (0x7f < repeat)
926 {
927 q=EncodeRLE(q,buffer,literal,repeat);
928 literal=0;
929 repeat=0;
930 }
931 }
932 else
933 {
934 if (repeat >= 2)
935 literal+=repeat;
936 else
937 {
938 q=EncodeRLE(q,buffer,literal,repeat);
939 buffer[0]=buffer[literal+repeat];
940 literal=0;
941 }
942 literal++;
943 repeat=0;
944 if (0x7f < literal)
945 {
946 q=EncodeRLE(q,buffer,(literal < 0x80 ? literal : 0x80),0);
947 (void) memmove(buffer,buffer+literal+repeat,0x80);
948 literal-=0x80;
949 }
950 }
951 bits=8/(int) bits_per_pixel-1;
952 buffer[literal+repeat]=0x00;
953 }
954 }
955 status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
956 image->rows);
957 if (status == MagickFalse)
958 break;
959 }
960 q=EncodeRLE(q,buffer,literal,repeat);
961 scanline=(unsigned char *) RelinquishMagickMemory(scanline);
962 buffer=(unsigned char *) RelinquishMagickMemory(buffer);
963 quantum_info=DestroyQuantumInfo(quantum_info);
964 /*
965 Write the Image record header.
966 */
967 (void) WriteBlobMSBLong(image,(unsigned int)
968 (TellBlob(image)+8*pdb_info.number_records));
969 (void) WriteBlobByte(image,0x40);
970 (void) WriteBlobByte(image,0x6f);
971 (void) WriteBlobByte(image,0x80);
972 (void) WriteBlobByte(image,0);
973 if (pdb_info.number_records > 1)
974 {
975 /*
976 Write the comment record header.
977 */
978 (void) WriteBlobMSBLong(image,(unsigned int) (TellBlob(image)+8+58+q-
979 runlength));
980 (void) WriteBlobByte(image,0x40);
981 (void) WriteBlobByte(image,0x6f);
982 (void) WriteBlobByte(image,0x80);
983 (void) WriteBlobByte(image,1);
984 }
985 /*
986 Write the Image data.
987 */
988 (void) WriteBlob(image,sizeof(pdb_image.name),(unsigned char *)
989 pdb_image.name);
990 (void) WriteBlobByte(image,(unsigned char) pdb_image.version);
991 (void) WriteBlobByte(image,pdb_image.type);
992 (void) WriteBlobMSBLong(image,(unsigned int) pdb_image.reserved_1);
993 (void) WriteBlobMSBLong(image,(unsigned int) pdb_image.note);
994 (void) WriteBlobMSBShort(image,(unsigned short) pdb_image.x_last);
995 (void) WriteBlobMSBShort(image,(unsigned short) pdb_image.y_last);
996 (void) WriteBlobMSBLong(image,(unsigned int) pdb_image.reserved_2);
997 (void) WriteBlobMSBShort(image,pdb_image.x_anchor);
998 (void) WriteBlobMSBShort(image,pdb_image.y_anchor);
999 (void) WriteBlobMSBShort(image,(unsigned short) pdb_image.width);
1000 (void) WriteBlobMSBShort(image,(unsigned short) pdb_image.height);
1001 (void) WriteBlob(image,(size_t) (q-runlength),runlength);
1002 runlength=(unsigned char *) RelinquishMagickMemory(runlength);
1003 if (pdb_info.number_records > 1)
1004 (void) WriteBlobString(image,comment);
1005 (void) CloseBlob(image);
1006 return(MagickTrue);
1007 }
1008