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 1999-2016 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 % 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 count=ReadBlob(image,sizeof(pdb_info.name),(unsigned char *) pdb_info.name);
334 if (count != sizeof(pdb_info.name))
335 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
336 pdb_info.attributes=(short) ReadBlobMSBShort(image);
337 pdb_info.version=(short) ReadBlobMSBShort(image);
338 pdb_info.create_time=ReadBlobMSBLong(image);
339 pdb_info.modify_time=ReadBlobMSBLong(image);
340 pdb_info.archive_time=ReadBlobMSBLong(image);
341 pdb_info.modify_number=ReadBlobMSBLong(image);
342 pdb_info.application_info=ReadBlobMSBLong(image);
343 pdb_info.sort_info=ReadBlobMSBLong(image);
344 (void) ReadBlob(image,4,(unsigned char *) pdb_info.type);
345 (void) ReadBlob(image,4,(unsigned char *) pdb_info.id);
346 pdb_info.seed=ReadBlobMSBLong(image);
347 pdb_info.next_record=ReadBlobMSBLong(image);
348 pdb_info.number_records=(short) ReadBlobMSBShort(image);
349 if ((memcmp(pdb_info.type,"vIMG",4) != 0) ||
350 (memcmp(pdb_info.id,"View",4) != 0))
351 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
352 if (pdb_info.next_record != 0)
353 ThrowReaderException(CoderError,"MultipleRecordListNotSupported");
354 /*
355 Read record header.
356 */
357 img_offset=(ssize_t) ReadBlobMSBSignedLong(image);
358 attributes=(unsigned char) ReadBlobByte(image);
359 (void) attributes;
360 count=ReadBlob(image,3,(unsigned char *) tag);
361 if (count != 3 || memcmp(tag,"\x6f\x80\x00",3) != 0)
362 ThrowReaderException(CorruptImageError,"CorruptImage");
363 if (pdb_info.number_records > 1)
364 {
365 comment_offset=(ssize_t) ReadBlobMSBSignedLong(image);
366 attributes=(unsigned char) ReadBlobByte(image);
367 count=ReadBlob(image,3,(unsigned char *) tag);
368 if (count != 3 || memcmp(tag,"\x6f\x80\x01",3) != 0)
369 ThrowReaderException(CorruptImageError,"CorruptImage");
370 }
371 num_pad_bytes = (size_t) (img_offset - TellBlob( image ));
372 while (num_pad_bytes-- != 0)
373 {
374 int
375 c;
376
377 c=ReadBlobByte(image);
378 if (c == EOF)
379 break;
380 }
381 /*
382 Read image header.
383 */
384 count=ReadBlob(image,sizeof(pdb_image.name),(unsigned char *) pdb_image.name);
385 if (count != sizeof(pdb_image.name))
386 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
387 pdb_image.version=ReadBlobByte(image);
388 pdb_image.type=(unsigned char) (ReadBlobByte(image));
389 pdb_image.reserved_1=ReadBlobMSBLong(image);
390 pdb_image.note=ReadBlobMSBLong(image);
391 pdb_image.x_last=(short) ReadBlobMSBShort(image);
392 pdb_image.y_last=(short) ReadBlobMSBShort(image);
393 pdb_image.reserved_2=ReadBlobMSBLong(image);
394 pdb_image.x_anchor=ReadBlobMSBShort(image);
395 pdb_image.y_anchor=ReadBlobMSBShort(image);
396 pdb_image.width=(short) ReadBlobMSBShort(image);
397 pdb_image.height=(short) ReadBlobMSBShort(image);
398 /*
399 Initialize image structure.
400 */
401 image->columns=(size_t) pdb_image.width;
402 image->rows=(size_t) pdb_image.height;
403 image->depth=8;
404 image->storage_class=PseudoClass;
405 bits_per_pixel=pdb_image.type == 0 ? 2UL : pdb_image.type == 2 ? 4UL : 1UL;
406 one=1;
407 if (AcquireImageColormap(image,one << bits_per_pixel,exception) == MagickFalse)
408 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
409 if (image_info->ping != MagickFalse)
410 {
411 (void) CloseBlob(image);
412 return(GetFirstImageInList(image));
413 }
414 status=SetImageExtent(image,image->columns,image->rows,exception);
415 if (status == MagickFalse)
416 return(DestroyImageList(image));
417 packets=(bits_per_pixel*image->columns+7)/8;
418 pixels=(unsigned char *) AcquireQuantumMemory(packets+257UL,image->rows*
419 sizeof(*pixels));
420 if (pixels == (unsigned char *) NULL)
421 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
422 switch (pdb_image.version & 0x07)
423 {
424 case 0:
425 {
426 image->compression=NoCompression;
427 count=(ssize_t) ReadBlob(image, packets * image -> rows, pixels);
428 break;
429 }
430 case 1:
431 {
432 image->compression=RLECompression;
433 if (!DecodeImage(image, pixels, packets * image -> rows))
434 ThrowReaderException( CorruptImageError, "RLEDecoderError" );
435 break;
436 }
437 default:
438 ThrowReaderException(CorruptImageError,
439 "UnrecognizedImageCompressionType" );
440 }
441 p=pixels;
442 switch (bits_per_pixel)
443 {
444 case 1:
445 {
446 int
447 bit;
448
449 /*
450 Read 1-bit PDB image.
451 */
452 for (y=0; y < (ssize_t) image->rows; y++)
453 {
454 q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
455 if (q == (Quantum *) NULL)
456 break;
457 for (x=0; x < ((ssize_t) image->columns-7); x+=8)
458 {
459 for (bit=0; bit < 8; bit++)
460 {
461 index=(Quantum) (*p & (0x80 >> bit) ? 0x00 : 0x01);
462 SetPixelIndex(image,index,q);
463 q+=GetPixelChannels(image);
464 }
465 p++;
466 }
467 if (SyncAuthenticPixels(image,exception) == MagickFalse)
468 break;
469 status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
470 image->rows);
471 if (status == MagickFalse)
472 break;
473 }
474 (void) SyncImage(image,exception);
475 break;
476 }
477 case 2:
478 {
479 /*
480 Read 2-bit PDB image.
481 */
482 for (y=0; y < (ssize_t) image->rows; y++)
483 {
484 q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
485 if (q == (Quantum *) NULL)
486 break;
487 for (x=0; x < (ssize_t) image->columns-3; x+=4)
488 {
489 index=ConstrainColormapIndex(image,3UL-((*p >> 6) & 0x03),exception);
490 SetPixelIndex(image,index,q);
491 q+=GetPixelChannels(image);
492 index=ConstrainColormapIndex(image,3UL-((*p >> 4) & 0x03),exception);
493 SetPixelIndex(image,index,q);
494 q+=GetPixelChannels(image);
495 index=ConstrainColormapIndex(image,3UL-((*p >> 2) & 0x03),exception);
496 SetPixelIndex(image,index,q);
497 q+=GetPixelChannels(image);
498 index=ConstrainColormapIndex(image,3UL-((*p) & 0x03),exception);
499 SetPixelIndex(image,index,q);
500 p++;
501 q+=GetPixelChannels(image);
502 }
503 if (SyncAuthenticPixels(image,exception) == MagickFalse)
504 break;
505 status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
506 image->rows);
507 if (status == MagickFalse)
508 break;
509 }
510 (void) SyncImage(image,exception);
511 break;
512 }
513 case 4:
514 {
515 /*
516 Read 4-bit PDB image.
517 */
518 for (y=0; y < (ssize_t) image->rows; y++)
519 {
520 q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
521 if (q == (Quantum *) NULL)
522 break;
523 for (x=0; x < (ssize_t) image->columns-1; x+=2)
524 {
525 index=ConstrainColormapIndex(image,15UL-((*p >> 4) & 0x0f),exception);
526 SetPixelIndex(image,index,q);
527 q+=GetPixelChannels(image);
528 index=ConstrainColormapIndex(image,15UL-((*p) & 0x0f),exception);
529 SetPixelIndex(image,index,q);
530 p++;
531 q+=GetPixelChannels(image);
532 }
533 if (SyncAuthenticPixels(image,exception) == MagickFalse)
534 break;
535 status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
536 image->rows);
537 if (status == MagickFalse)
538 break;
539 }
540 (void) SyncImage(image,exception);
541 break;
542 }
543 default:
544 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
545 }
546 pixels=(unsigned char *) RelinquishMagickMemory(pixels);
547 if (EOFBlob(image) != MagickFalse)
548 ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
549 image->filename);
550 if (pdb_info.number_records > 1)
551 {
552 char
553 *comment;
554
555 int
556 c;
557
558 register char
559 *p;
560
561 size_t
562 length;
563
564 num_pad_bytes = (size_t) (comment_offset - TellBlob( image ));
565 while (num_pad_bytes--) ReadBlobByte( image );
566
567 /*
568 Read comment.
569 */
570 c=ReadBlobByte(image);
571 length=MagickPathExtent;
572 comment=AcquireString((char *) NULL);
573 for (p=comment; c != EOF; p++)
574 {
575 if ((size_t) (p-comment+MagickPathExtent) >= length)
576 {
577 *p='\0';
578 length<<=1;
579 length+=MagickPathExtent;
580 comment=(char *) ResizeQuantumMemory(comment,length+MagickPathExtent,
581 sizeof(*comment));
582 if (comment == (char *) NULL)
583 break;
584 p=comment+strlen(comment);
585 }
586 *p=c;
587 c=ReadBlobByte(image);
588 }
589 *p='\0';
590 if (comment == (char *) NULL)
591 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
592 (void) SetImageProperty(image,"comment",comment,exception);
593 comment=DestroyString(comment);
594 }
595 (void) CloseBlob(image);
596 return(GetFirstImageInList(image));
597 }
598
599 /*
600 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
601 % %
602 % %
603 % %
604 % R e g i s t e r P D B I m a g e %
605 % %
606 % %
607 % %
608 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
609 %
610 % RegisterPDBImage() adds properties for the PDB image format to
611 % the list of supported formats. The properties include the image format
612 % tag, a method to read and/or write the format, whether the format
613 % supports the saving of more than one frame to the same file or blob,
614 % whether the format supports native in-memory I/O, and a brief
615 % description of the format.
616 %
617 % The format of the RegisterPDBImage method is:
618 %
619 % size_t RegisterPDBImage(void)
620 %
621 */
RegisterPDBImage(void)622 ModuleExport size_t RegisterPDBImage(void)
623 {
624 MagickInfo
625 *entry;
626
627 entry=AcquireMagickInfo("PDB","PDB","Palm Database ImageViewer Format");
628 entry->decoder=(DecodeImageHandler *) ReadPDBImage;
629 entry->encoder=(EncodeImageHandler *) WritePDBImage;
630 entry->magick=(IsImageFormatHandler *) IsPDB;
631 (void) RegisterMagickInfo(entry);
632 return(MagickImageCoderSignature);
633 }
634
635 /*
636 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
637 % %
638 % %
639 % %
640 % U n r e g i s t e r P D B I m a g e %
641 % %
642 % %
643 % %
644 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
645 %
646 % UnregisterPDBImage() removes format registrations made by the
647 % PDB module from the list of supported formats.
648 %
649 % The format of the UnregisterPDBImage method is:
650 %
651 % UnregisterPDBImage(void)
652 %
653 */
UnregisterPDBImage(void)654 ModuleExport void UnregisterPDBImage(void)
655 {
656 (void) UnregisterMagickInfo("PDB");
657 }
658
659 /*
660 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
661 % %
662 % %
663 % %
664 % W r i t e P D B I m a g e %
665 % %
666 % %
667 % %
668 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
669 %
670 % WritePDBImage() writes an image
671 %
672 % The format of the WritePDBImage method is:
673 %
674 % MagickBooleanType WritePDBImage(const ImageInfo *image_info,
675 % Image *image,ExceptionInfo *exception)
676 %
677 % A description of each parameter follows.
678 %
679 % o image_info: the image info.
680 %
681 % o image: The image.
682 %
683 % o exception: return any errors or warnings in this structure.
684 %
685 */
686
EncodeRLE(unsigned char * destination,unsigned char * source,size_t literal,size_t repeat)687 static unsigned char *EncodeRLE(unsigned char *destination,
688 unsigned char *source,size_t literal,size_t repeat)
689 {
690 if (literal > 0)
691 *destination++=(unsigned char) (literal-1);
692 (void) CopyMagickMemory(destination,source,literal);
693 destination+=literal;
694 if (repeat > 0)
695 {
696 *destination++=(unsigned char) (0x80 | (repeat-1));
697 *destination++=source[literal];
698 }
699 return(destination);
700 }
701
WritePDBImage(const ImageInfo * image_info,Image * image,ExceptionInfo * exception)702 static MagickBooleanType WritePDBImage(const ImageInfo *image_info,Image *image,
703 ExceptionInfo *exception)
704 {
705 const char
706 *comment;
707
708 int
709 bits;
710
711 MagickBooleanType
712 status;
713
714 PDBImage
715 pdb_image;
716
717 PDBInfo
718 pdb_info;
719
720 QuantumInfo
721 *quantum_info;
722
723 register const Quantum
724 *p;
725
726 register ssize_t
727 x;
728
729 register unsigned char
730 *q;
731
732 size_t
733 bits_per_pixel,
734 literal,
735 packets,
736 packet_size,
737 repeat;
738
739 ssize_t
740 y;
741
742 unsigned char
743 *buffer,
744 *runlength,
745 *scanline;
746
747 /*
748 Open output image file.
749 */
750 assert(image_info != (const ImageInfo *) NULL);
751 assert(image_info->signature == MagickCoreSignature);
752 assert(image != (Image *) NULL);
753 assert(image->signature == MagickCoreSignature);
754 if (image->debug != MagickFalse)
755 (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
756 assert(exception != (ExceptionInfo *) NULL);
757 assert(exception->signature == MagickCoreSignature);
758 status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
759 if (status == MagickFalse)
760 return(status);
761 (void) TransformImageColorspace(image,sRGBColorspace,exception);
762 if (SetImageMonochrome(image,exception) != MagickFalse) {
763 bits_per_pixel=1;
764 } else if (image->colors <= 4) {
765 bits_per_pixel=2;
766 } else if (image->colors <= 8) {
767 bits_per_pixel=3;
768 } else {
769 bits_per_pixel=4;
770 }
771 (void) ResetMagickMemory(&pdb_info,0,sizeof(pdb_info));
772 (void) CopyMagickString(pdb_info.name,image_info->filename,
773 sizeof(pdb_info.name));
774 pdb_info.attributes=0;
775 pdb_info.version=0;
776 pdb_info.create_time=time(NULL);
777 pdb_info.modify_time=pdb_info.create_time;
778 pdb_info.archive_time=0;
779 pdb_info.modify_number=0;
780 pdb_info.application_info=0;
781 pdb_info.sort_info=0;
782 (void) CopyMagickMemory(pdb_info.type,"vIMG",4);
783 (void) CopyMagickMemory(pdb_info.id,"View",4);
784 pdb_info.seed=0;
785 pdb_info.next_record=0;
786 comment=GetImageProperty(image,"comment",exception);
787 pdb_info.number_records=(comment == (const char *) NULL ? 1 : 2);
788 (void) WriteBlob(image,sizeof(pdb_info.name),(unsigned char *) pdb_info.name);
789 (void) WriteBlobMSBShort(image,(unsigned short) pdb_info.attributes);
790 (void) WriteBlobMSBShort(image,(unsigned short) pdb_info.version);
791 (void) WriteBlobMSBLong(image,(unsigned int) pdb_info.create_time);
792 (void) WriteBlobMSBLong(image,(unsigned int) pdb_info.modify_time);
793 (void) WriteBlobMSBLong(image,(unsigned int) pdb_info.archive_time);
794 (void) WriteBlobMSBLong(image,(unsigned int) pdb_info.modify_number);
795 (void) WriteBlobMSBLong(image,(unsigned int) pdb_info.application_info);
796 (void) WriteBlobMSBLong(image,(unsigned int) pdb_info.sort_info);
797 (void) WriteBlob(image,4,(unsigned char *) pdb_info.type);
798 (void) WriteBlob(image,4,(unsigned char *) pdb_info.id);
799 (void) WriteBlobMSBLong(image,(unsigned int) pdb_info.seed);
800 (void) WriteBlobMSBLong(image,(unsigned int) pdb_info.next_record);
801 (void) WriteBlobMSBShort(image,(unsigned short) pdb_info.number_records);
802 (void) CopyMagickString(pdb_image.name,pdb_info.name,sizeof(pdb_image.name));
803 pdb_image.version=1; /* RLE Compressed */
804 switch (bits_per_pixel)
805 {
806 case 1: pdb_image.type=(unsigned char) 0xff; break; /* monochrome */
807 case 2: pdb_image.type=(unsigned char) 0x00; break; /* 2 bit gray */
808 default: pdb_image.type=(unsigned char) 0x02; /* 4 bit gray */
809 }
810 pdb_image.reserved_1=0;
811 pdb_image.note=0;
812 pdb_image.x_last=0;
813 pdb_image.y_last=0;
814 pdb_image.reserved_2=0;
815 pdb_image.x_anchor=(unsigned short) 0xffff;
816 pdb_image.y_anchor=(unsigned short) 0xffff;
817 pdb_image.width=(short) image->columns;
818 if (image->columns % 16)
819 pdb_image.width=(short) (16*(image->columns/16+1));
820 pdb_image.height=(short) image->rows;
821 packets=((bits_per_pixel*image->columns+7)/8);
822 runlength=(unsigned char *) AcquireQuantumMemory(9UL*packets,
823 image->rows*sizeof(*runlength));
824 if (runlength == (unsigned char *) NULL)
825 ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
826 buffer=(unsigned char *) AcquireQuantumMemory(512,sizeof(*buffer));
827 if (buffer == (unsigned char *) NULL)
828 ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
829 packet_size=(size_t) (image->depth > 8 ? 2: 1);
830 scanline=(unsigned char *) AcquireQuantumMemory(image->columns,packet_size*
831 sizeof(*scanline));
832 if (scanline == (unsigned char *) NULL)
833 ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
834 if (IssRGBCompatibleColorspace(image->colorspace) == MagickFalse)
835 (void) TransformImageColorspace(image,sRGBColorspace,exception);
836 /*
837 Convert to GRAY raster scanline.
838 */
839 quantum_info=AcquireQuantumInfo(image_info,image);
840 if (quantum_info == (QuantumInfo *) NULL)
841 ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
842 bits=8/(int) bits_per_pixel-1; /* start at most significant bits */
843 literal=0;
844 repeat=0;
845 q=runlength;
846 buffer[0]=0x00;
847 for (y=0; y < (ssize_t) image->rows; y++)
848 {
849 p=GetVirtualPixels(image,0,y,image->columns,1,exception);
850 if (p == (const Quantum *) NULL)
851 break;
852 (void) ExportQuantumPixels(image,(CacheView *) NULL,quantum_info,
853 GrayQuantum,scanline,exception);
854 for (x=0; x < (ssize_t) pdb_image.width; x++)
855 {
856 if (x < (ssize_t) image->columns)
857 buffer[literal+repeat]|=(0xff-scanline[x*packet_size]) >>
858 (8-bits_per_pixel) << bits*bits_per_pixel;
859 bits--;
860 if (bits < 0)
861 {
862 if (((literal+repeat) > 0) &&
863 (buffer[literal+repeat] == buffer[literal+repeat-1]))
864 {
865 if (repeat == 0)
866 {
867 literal--;
868 repeat++;
869 }
870 repeat++;
871 if (0x7f < repeat)
872 {
873 q=EncodeRLE(q,buffer,literal,repeat);
874 literal=0;
875 repeat=0;
876 }
877 }
878 else
879 {
880 if (repeat >= 2)
881 literal+=repeat;
882 else
883 {
884 q=EncodeRLE(q,buffer,literal,repeat);
885 buffer[0]=buffer[literal+repeat];
886 literal=0;
887 }
888 literal++;
889 repeat=0;
890 if (0x7f < literal)
891 {
892 q=EncodeRLE(q,buffer,(literal < 0x80 ? literal : 0x80),0);
893 (void) CopyMagickMemory(buffer,buffer+literal+repeat,0x80);
894 literal-=0x80;
895 }
896 }
897 bits=8/(int) bits_per_pixel-1;
898 buffer[literal+repeat]=0x00;
899 }
900 }
901 status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
902 image->rows);
903 if (status == MagickFalse)
904 break;
905 }
906 q=EncodeRLE(q,buffer,literal,repeat);
907 scanline=(unsigned char *) RelinquishMagickMemory(scanline);
908 buffer=(unsigned char *) RelinquishMagickMemory(buffer);
909 quantum_info=DestroyQuantumInfo(quantum_info);
910 /*
911 Write the Image record header.
912 */
913 (void) WriteBlobMSBLong(image,(unsigned int)
914 (TellBlob(image)+8*pdb_info.number_records));
915 (void) WriteBlobByte(image,0x40);
916 (void) WriteBlobByte(image,0x6f);
917 (void) WriteBlobByte(image,0x80);
918 (void) WriteBlobByte(image,0);
919 if (pdb_info.number_records > 1)
920 {
921 /*
922 Write the comment record header.
923 */
924 (void) WriteBlobMSBLong(image,(unsigned int) (TellBlob(image)+8+58+q-
925 runlength));
926 (void) WriteBlobByte(image,0x40);
927 (void) WriteBlobByte(image,0x6f);
928 (void) WriteBlobByte(image,0x80);
929 (void) WriteBlobByte(image,1);
930 }
931 /*
932 Write the Image data.
933 */
934 (void) WriteBlob(image,sizeof(pdb_image.name),(unsigned char *)
935 pdb_image.name);
936 (void) WriteBlobByte(image,(unsigned char) pdb_image.version);
937 (void) WriteBlobByte(image,pdb_image.type);
938 (void) WriteBlobMSBLong(image,(unsigned int) pdb_image.reserved_1);
939 (void) WriteBlobMSBLong(image,(unsigned int) pdb_image.note);
940 (void) WriteBlobMSBShort(image,(unsigned short) pdb_image.x_last);
941 (void) WriteBlobMSBShort(image,(unsigned short) pdb_image.y_last);
942 (void) WriteBlobMSBLong(image,(unsigned int) pdb_image.reserved_2);
943 (void) WriteBlobMSBShort(image,pdb_image.x_anchor);
944 (void) WriteBlobMSBShort(image,pdb_image.y_anchor);
945 (void) WriteBlobMSBShort(image,(unsigned short) pdb_image.width);
946 (void) WriteBlobMSBShort(image,(unsigned short) pdb_image.height);
947 (void) WriteBlob(image,(size_t) (q-runlength),runlength);
948 runlength=(unsigned char *) RelinquishMagickMemory(runlength);
949 if (pdb_info.number_records > 1)
950 (void) WriteBlobString(image,comment);
951 (void) CloseBlob(image);
952 return(MagickTrue);
953 }
954