2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
13 % Read/Write Palm Database ImageViewer Image Format %
20 % Copyright 1999-2018 ImageMagick Studio LLC, a non-profit organization %
21 % dedicated to making software imaging solutions freely available. %
23 % You may not use this file except in compliance with the License. You may %
24 % obtain a copy of the License at %
26 % https://www.imagemagick.org/script/license.php %
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. %
34 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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
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
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"
80 typedef struct _PDBInfo
98 type[4], /* database type identifier "vIMG" */
99 id[4]; /* database creator identifier "View" */
109 typedef struct _PDBImage
138 Forward declarations.
140 static MagickBooleanType
141 WritePDBImage(const ImageInfo *,Image *,ExceptionInfo *);
144 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
148 % D e c o d e I m a g e %
152 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
154 % DecodeImage unpacks the packed image pixels into runlength-encoded
157 % The format of the DecodeImage method is:
159 % MagickBooleanType DecodeImage(Image *image,unsigned char *pixels,
160 % const size_t length)
162 % A description of each parameter follows:
164 % o image: the address of a structure of type Image.
166 % o pixels: The address of a byte (8 bits) array of pixel data created by
167 % the decoding process.
169 % o length: Number of bytes to read into buffer 'pixels'.
172 static MagickBooleanType DecodeImage(Image *image, unsigned char *pixels,
175 #define RLE_MODE_NONE -1
176 #define RLE_MODE_COPY 0
177 #define RLE_MODE_RUN 1
179 int data = 0, count = 0;
181 int mode = RLE_MODE_NONE;
183 for (p = pixels; p < pixels + length; p++) {
185 data = ReadBlobByte( image );
186 if (-1 == data) return MagickFalse;
189 count = data - 128 + 1;
190 data = ReadBlobByte( image );
191 if (-1 == data) return MagickFalse;
193 mode = RLE_MODE_COPY;
198 if (RLE_MODE_COPY == mode) {
199 data = ReadBlobByte( image );
200 if (-1 == data) return MagickFalse;
202 *p = (unsigned char)data;
209 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
217 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
219 % IsPDB() returns MagickTrue if the image format type, identified by the
220 % magick string, is PDB.
222 % The format of the ReadPDBImage method is:
224 % MagickBooleanType IsPDB(const unsigned char *magick,const size_t length)
226 % A description of each parameter follows:
228 % o magick: compare image format pattern against these bytes.
230 % o length: Specifies the length of the magick string.
233 static MagickBooleanType IsPDB(const unsigned char *magick,const size_t length)
237 if (memcmp(magick+60,"vIMGView",8) == 0)
243 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
247 % R e a d P D B I m a g e %
251 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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.
257 % The format of the ReadPDBImage method is:
259 % Image *ReadPDBImage(const ImageInfo *image_info,ExceptionInfo *exception)
261 % A description of each parameter follows:
263 % o image_info: the image info.
265 % o exception: return any errors or warnings in this structure.
268 static Image *ReadPDBImage(const ImageInfo *image_info,ExceptionInfo *exception)
295 register unsigned char
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)
327 image=DestroyImageList(image);
328 return((Image *) NULL);
331 Determine if this a PDB image file.
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");
358 img_offset=(ssize_t) ReadBlobMSBSignedLong(image);
359 attributes=(unsigned char) ReadBlobByte(image);
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)
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");
372 num_pad_bytes = (size_t) (img_offset - TellBlob( image ));
373 while (num_pad_bytes-- != 0)
378 c=ReadBlobByte(image);
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);
400 Initialize image structure.
402 image->columns=(size_t) pdb_image.width;
403 image->rows=(size_t) pdb_image.height;
405 image->storage_class=PseudoClass;
406 bits_per_pixel=pdb_image.type == 0 ? 2UL : pdb_image.type == 2 ? 4UL : 1UL;
408 if (AcquireImageColormap(image,one << bits_per_pixel,exception) == MagickFalse)
409 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
410 if (image_info->ping != MagickFalse)
412 (void) CloseBlob(image);
413 return(GetFirstImageInList(image));
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*
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)
430 image->compression=NoCompression;
431 count=(ssize_t) ReadBlob(image,packets*image->rows,pixels);
432 if (count != (packets*image->rows))
434 pixels=(unsigned char *) RelinquishMagickMemory(pixels);
435 ThrowReaderException(CorruptImageError,"RLEDecoderError");
441 image->compression=RLECompression;
442 if (DecodeImage(image,pixels,packets*image->rows) == MagickFalse)
444 pixels=(unsigned char *) RelinquishMagickMemory(pixels);
445 ThrowReaderException(CorruptImageError,"RLEDecoderError");
451 pixels=(unsigned char *) RelinquishMagickMemory(pixels);
452 ThrowReaderException(CorruptImageError,
453 "UnrecognizedImageCompressionType");
457 switch (bits_per_pixel)
465 Read 1-bit PDB image.
467 for (y=0; y < (ssize_t) image->rows; y++)
469 q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
470 if (q == (Quantum *) NULL)
473 for (x=0; x < (ssize_t) image->columns; x++)
475 index=(Quantum) (*p & (0x80 >> bit) ? 0x00 : 0x01);
476 SetPixelIndex(image,index,q);
477 q+=GetPixelChannels(image);
485 if (SyncAuthenticPixels(image,exception) == MagickFalse)
487 status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
489 if (status == MagickFalse)
492 (void) SyncImage(image,exception);
501 Read 2-bit PDB image.
503 for (y=0; y < (ssize_t) image->rows; y++)
505 q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
506 if (q == (Quantum *) NULL)
509 for (x=0; x < (ssize_t) image->columns; x++)
512 index=ConstrainColormapIndex(image,3UL-((*p >> shift) & 0x03),
514 SetPixelIndex(image,index,q);
515 q+=GetPixelChannels(image);
522 if (SyncAuthenticPixels(image,exception) == MagickFalse)
524 status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
526 if (status == MagickFalse)
529 (void) SyncImage(image,exception);
538 Read 4-bit PDB image.
540 for (y=0; y < (ssize_t) image->rows; y++)
542 q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
543 if (q == (Quantum *) NULL)
546 for (x=0; x < (ssize_t) image->columns; x++)
549 index=ConstrainColormapIndex(image,15UL-((*p >> shift) & 0x0f),
551 SetPixelIndex(image,index,q);
552 q+=GetPixelChannels(image);
559 if (SyncAuthenticPixels(image,exception) == MagickFalse)
561 status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
563 if (status == MagickFalse)
566 (void) SyncImage(image,exception);
571 pixels=(unsigned char *) RelinquishMagickMemory(pixels);
572 ThrowReaderException(CorruptImageError,"ImproperImageHeader");
575 pixels=(unsigned char *) RelinquishMagickMemory(pixels);
576 if (EOFBlob(image) != MagickFalse)
577 ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
579 if (pdb_info.number_records > 1)
593 num_pad_bytes = (size_t) (comment_offset - TellBlob( image ));
594 while (num_pad_bytes-- != 0)
599 c=ReadBlobByte(image);
607 c=ReadBlobByte(image);
608 length=MagickPathExtent;
609 comment=AcquireString((char *) NULL);
610 for (p=comment; c != EOF; p++)
612 if ((size_t) (p-comment+MagickPathExtent) >= length)
616 length+=MagickPathExtent;
617 comment=(char *) ResizeQuantumMemory(comment,length+
618 MagickPathExtent,sizeof(*comment));
619 if (comment == (char *) NULL)
621 p=comment+strlen(comment);
624 c=ReadBlobByte(image);
627 if (comment == (char *) NULL)
628 ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
629 (void) SetImageProperty(image,"comment",comment,exception);
630 comment=DestroyString(comment);
632 (void) CloseBlob(image);
633 return(GetFirstImageInList(image));
637 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
641 % R e g i s t e r P D B I m a g e %
645 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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.
654 % The format of the RegisterPDBImage method is:
656 % size_t RegisterPDBImage(void)
659 ModuleExport size_t RegisterPDBImage(void)
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);
673 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
677 % U n r e g i s t e r P D B I m a g e %
681 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
683 % UnregisterPDBImage() removes format registrations made by the
684 % PDB module from the list of supported formats.
686 % The format of the UnregisterPDBImage method is:
688 % UnregisterPDBImage(void)
691 ModuleExport void UnregisterPDBImage(void)
693 (void) UnregisterMagickInfo("PDB");
697 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
701 % W r i t e P D B I m a g e %
705 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
707 % WritePDBImage() writes an image
709 % The format of the WritePDBImage method is:
711 % MagickBooleanType WritePDBImage(const ImageInfo *image_info,
712 % Image *image,ExceptionInfo *exception)
714 % A description of each parameter follows.
716 % o image_info: the image info.
718 % o image: The image.
720 % o exception: return any errors or warnings in this structure.
724 static unsigned char *EncodeRLE(unsigned char *destination,
725 unsigned char *source,size_t literal,size_t repeat)
728 *destination++=(unsigned char) (literal-1);
729 (void) memcpy(destination,source,literal);
730 destination+=literal;
733 *destination++=(unsigned char) (0x80 | (repeat-1));
734 *destination++=source[literal];
739 static MagickBooleanType WritePDBImage(const ImageInfo *image_info,Image *image,
740 ExceptionInfo *exception)
760 register const Quantum
766 register unsigned char
785 Open output image file.
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)
798 (void) TransformImageColorspace(image,sRGBColorspace,exception);
799 if (SetImageMonochrome(image,exception) != MagickFalse) {
801 } else if (image->colors <= 4) {
803 } else if (image->colors <= 8) {
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;
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);
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)
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 */
848 pdb_image.reserved_1=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*
866 if ((runlength == (unsigned char *) NULL) ||
867 (buffer == (unsigned char *) NULL) ||
868 (scanline == (unsigned char *) NULL))
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");
878 (void) memset(buffer,0,512*sizeof(*buffer));
879 if (IssRGBCompatibleColorspace(image->colorspace) == MagickFalse)
880 (void) TransformImageColorspace(image,sRGBColorspace,exception);
882 Convert to GRAY raster scanline.
884 quantum_info=AcquireQuantumInfo(image_info,image);
885 if (quantum_info == (QuantumInfo *) NULL)
887 runlength=(unsigned char *) RelinquishMagickMemory(runlength);
888 ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
890 status=SetQuantumDepth(image,quantum_info,image->depth > 8 ? 16 : 8);
891 bits=8/(int) bits_per_pixel-1; /* start at most significant bits */
896 for (y=0; y < (ssize_t) image->rows; y++)
898 p=GetVirtualPixels(image,0,y,image->columns,1,exception);
899 if (p == (const Quantum *) NULL)
901 (void) ExportQuantumPixels(image,(CacheView *) NULL,quantum_info,
902 GrayQuantum,scanline,exception);
903 for (x=0; x < (ssize_t) pdb_image.width; x++)
905 if (x < (ssize_t) image->columns)
906 buffer[literal+repeat]|=(0xff-scanline[x*packet_size]) >>
907 (8-bits_per_pixel) << bits*bits_per_pixel;
911 if (((literal+repeat) > 0) &&
912 (buffer[literal+repeat] == buffer[literal+repeat-1]))
922 q=EncodeRLE(q,buffer,literal,repeat);
933 q=EncodeRLE(q,buffer,literal,repeat);
934 buffer[0]=buffer[literal+repeat];
941 q=EncodeRLE(q,buffer,(literal < 0x80 ? literal : 0x80),0);
942 (void) memmove(buffer,buffer+literal+repeat,0x80);
946 bits=8/(int) bits_per_pixel-1;
947 buffer[literal+repeat]=0x00;
950 status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
952 if (status == MagickFalse)
955 q=EncodeRLE(q,buffer,literal,repeat);
956 scanline=(unsigned char *) RelinquishMagickMemory(scanline);
957 buffer=(unsigned char *) RelinquishMagickMemory(buffer);
958 quantum_info=DestroyQuantumInfo(quantum_info);
960 Write the Image record header.
962 (void) WriteBlobMSBLong(image,(unsigned int)
963 (TellBlob(image)+8*pdb_info.number_records));
964 (void) WriteBlobByte(image,0x40);
965 (void) WriteBlobByte(image,0x6f);
966 (void) WriteBlobByte(image,0x80);
967 (void) WriteBlobByte(image,0);
968 if (pdb_info.number_records > 1)
971 Write the comment record header.
973 (void) WriteBlobMSBLong(image,(unsigned int) (TellBlob(image)+8+58+q-
975 (void) WriteBlobByte(image,0x40);
976 (void) WriteBlobByte(image,0x6f);
977 (void) WriteBlobByte(image,0x80);
978 (void) WriteBlobByte(image,1);
981 Write the Image data.
983 (void) WriteBlob(image,sizeof(pdb_image.name),(unsigned char *)
985 (void) WriteBlobByte(image,(unsigned char) pdb_image.version);
986 (void) WriteBlobByte(image,pdb_image.type);
987 (void) WriteBlobMSBLong(image,(unsigned int) pdb_image.reserved_1);
988 (void) WriteBlobMSBLong(image,(unsigned int) pdb_image.note);
989 (void) WriteBlobMSBShort(image,(unsigned short) pdb_image.x_last);
990 (void) WriteBlobMSBShort(image,(unsigned short) pdb_image.y_last);
991 (void) WriteBlobMSBLong(image,(unsigned int) pdb_image.reserved_2);
992 (void) WriteBlobMSBShort(image,pdb_image.x_anchor);
993 (void) WriteBlobMSBShort(image,pdb_image.y_anchor);
994 (void) WriteBlobMSBShort(image,(unsigned short) pdb_image.width);
995 (void) WriteBlobMSBShort(image,(unsigned short) pdb_image.height);
996 (void) WriteBlob(image,(size_t) (q-runlength),runlength);
997 runlength=(unsigned char *) RelinquishMagickMemory(runlength);
998 if (pdb_info.number_records > 1)
999 (void) WriteBlobString(image,comment);
1000 (void) CloseBlob(image);