Bug 689011 - TIFF generator: missing PageCount value
Summary: TIFF generator: missing PageCount value
Status: RESOLVED WONTFIX
Alias: None
Product: Ghostscript
Classification: Unclassified
Component: Other Driver (show other bugs)
Version: 8.54
Hardware: All All
: P4 normal
Assignee: Marcos H. Woehrmann
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2006-11-24 18:54 UTC by Christian Faure
Modified: 2011-07-13 05:21 UTC (History)
1 user (show)

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Description Christian Faure 2006-11-24 18:54:49 UTC 
TIFF Driver (gdevtifs.c)
In generated TIFF's the PageCount is alway 0 (zero) in pair (PageNumber,PageCount)

Properties obtained with HIJAAK software from tiff file with five pages, 
see tag 297:
------------------------------------------------------------------------
Intel type
current IFD at:  8
number of tags in current IFD:  20
NewSubFileType         tag: 254 type: 4 count: 1  data: 2
width                  tag: 256 type: 4 count: 1  data: 1728
height                 tag: 257 type: 4 count: 1  data: 2292
BitsPerSample          tag: 258 type: 3 count: 1  data: 1
Compression            tag: 259 type: 3 count: 1  data: 4
PhotoInterp            tag: 262 type: 3 count: 1  data: 0
fillOrder              tag: 266 type: 3 count: 1  data: 1
stripOffsets           tag: 273 type: 4 count: 1  data: 338
orientation            tag: 274 type: 3 count: 1  data: 1
SamplesPerPixel        tag: 277 type: 3 count: 1  data: 1
RowsPerStrip           tag: 278 type: 4 count: 1  data: 2292
StripByteCounts        tag: 279 type: 4 count: 1  data: 2473
XResolution            tag: 282 type: 5 count: 1  data: 204 1
YResolution            tag: 283 type: 5 count: 1  data: 196 1
PlanarConfig           tag: 284 type: 3 count: 1  data: 1
Group4Options          tag: 293 type: 4 count: 1  data: 0
ResolutionUnit         tag: 296 type: 3 count: 1  data: 2
PageNumber             tag: 297 type: 3 count: 2  data: 
0	0	
software               tag: 305 type: 2 count: 21  data: GPL Ghostscript 8.54
dateTime               tag: 306 type: 2 count: 20  data: 2000:01:01 23:37:39

Intel type
current IFD at:  2812
number of tags in current IFD:  20
NewSubFileType         tag: 254 type: 4 count: 1  data: 2
width                  tag: 256 type: 4 count: 1  data: 1728
height                 tag: 257 type: 4 count: 1  data: 2292
BitsPerSample          tag: 258 type: 3 count: 1  data: 1
Compression            tag: 259 type: 3 count: 1  data: 4
PhotoInterp            tag: 262 type: 3 count: 1  data: 0
fillOrder              tag: 266 type: 3 count: 1  data: 1
stripOffsets           tag: 273 type: 4 count: 1  data: 3142
orientation            tag: 274 type: 3 count: 1  data: 1
SamplesPerPixel        tag: 277 type: 3 count: 1  data: 1
RowsPerStrip           tag: 278 type: 4 count: 1  data: 2292
StripByteCounts        tag: 279 type: 4 count: 1  data: 2498
XResolution            tag: 282 type: 5 count: 1  data: 204 1
YResolution            tag: 283 type: 5 count: 1  data: 196 1
PlanarConfig           tag: 284 type: 3 count: 1  data: 1
Group4Options          tag: 293 type: 4 count: 1  data: 0
ResolutionUnit         tag: 296 type: 3 count: 1  data: 2
PageNumber             tag: 297 type: 3 count: 2  data: 
1	0	
software               tag: 305 type: 2 count: 21  data: GPL Ghostscript 8.54
dateTime               tag: 306 type: 2 count: 20  data: 2000:01:01 23:37:39

Intel type
current IFD at:  5640
number of tags in current IFD:  20
NewSubFileType         tag: 254 type: 4 count: 1  data: 2
width                  tag: 256 type: 4 count: 1  data: 1728
height                 tag: 257 type: 4 count: 1  data: 2292
BitsPerSample          tag: 258 type: 3 count: 1  data: 1
Compression            tag: 259 type: 3 count: 1  data: 4
PhotoInterp            tag: 262 type: 3 count: 1  data: 0
fillOrder              tag: 266 type: 3 count: 1  data: 1
stripOffsets           tag: 273 type: 4 count: 1  data: 5970
orientation            tag: 274 type: 3 count: 1  data: 1
SamplesPerPixel        tag: 277 type: 3 count: 1  data: 1
RowsPerStrip           tag: 278 type: 4 count: 1  data: 2292
StripByteCounts        tag: 279 type: 4 count: 1  data: 2503
XResolution            tag: 282 type: 5 count: 1  data: 204 1
YResolution            tag: 283 type: 5 count: 1  data: 196 1
PlanarConfig           tag: 284 type: 3 count: 1  data: 1
Group4Options          tag: 293 type: 4 count: 1  data: 0
ResolutionUnit         tag: 296 type: 3 count: 1  data: 2
PageNumber             tag: 297 type: 3 count: 2  data: 
2	0	
software               tag: 305 type: 2 count: 21  data: GPL Ghostscript 8.54
dateTime               tag: 306 type: 2 count: 20  data: 2000:01:01 23:37:39

Intel type
current IFD at:  8474
number of tags in current IFD:  20
NewSubFileType         tag: 254 type: 4 count: 1  data: 2
width                  tag: 256 type: 4 count: 1  data: 1728
height                 tag: 257 type: 4 count: 1  data: 2292
BitsPerSample          tag: 258 type: 3 count: 1  data: 1
Compression            tag: 259 type: 3 count: 1  data: 4
PhotoInterp            tag: 262 type: 3 count: 1  data: 0
fillOrder              tag: 266 type: 3 count: 1  data: 1
stripOffsets           tag: 273 type: 4 count: 1  data: 8804
orientation            tag: 274 type: 3 count: 1  data: 1
SamplesPerPixel        tag: 277 type: 3 count: 1  data: 1
RowsPerStrip           tag: 278 type: 4 count: 1  data: 2292
StripByteCounts        tag: 279 type: 4 count: 1  data: 2486
XResolution            tag: 282 type: 5 count: 1  data: 204 1
YResolution            tag: 283 type: 5 count: 1  data: 196 1
PlanarConfig           tag: 284 type: 3 count: 1  data: 1
Group4Options          tag: 293 type: 4 count: 1  data: 0
ResolutionUnit         tag: 296 type: 3 count: 1  data: 2
PageNumber             tag: 297 type: 3 count: 2  data: 
3	0	
software               tag: 305 type: 2 count: 21  data: GPL Ghostscript 8.54
dateTime               tag: 306 type: 2 count: 20  data: 2000:01:01 23:37:39

Intel type
current IFD at:  11290
number of tags in current IFD:  20
NewSubFileType         tag: 254 type: 4 count: 1  data: 2
width                  tag: 256 type: 4 count: 1  data: 1728
height                 tag: 257 type: 4 count: 1  data: 2292
BitsPerSample          tag: 258 type: 3 count: 1  data: 1
Compression            tag: 259 type: 3 count: 1  data: 4
PhotoInterp            tag: 262 type: 3 count: 1  data: 0
fillOrder              tag: 266 type: 3 count: 1  data: 1
stripOffsets           tag: 273 type: 4 count: 1  data: 11620
orientation            tag: 274 type: 3 count: 1  data: 1
SamplesPerPixel        tag: 277 type: 3 count: 1  data: 1
RowsPerStrip           tag: 278 type: 4 count: 1  data: 2292
StripByteCounts        tag: 279 type: 4 count: 1  data: 2497
XResolution            tag: 282 type: 5 count: 1  data: 204 1
YResolution            tag: 283 type: 5 count: 1  data: 196 1
PlanarConfig           tag: 284 type: 3 count: 1  data: 1
Group4Options          tag: 293 type: 4 count: 1  data: 0
ResolutionUnit         tag: 296 type: 3 count: 1  data: 2
PageNumber             tag: 297 type: 3 count: 2  data: 
4	0	
software               tag: 305 type: 2 count: 21  data: GPL Ghostscript 8.54
dateTime               tag: 306 type: 2 count: 20  data: 2000:01:01 23:37:39
Comment 1 Alex Cherepanov 2006-11-25 05:38:50 UTC 
Thank you for using and testing Ghostscript.
Accerding to the TIFF 6 spec, if PageNumber[1] is 0, the total number of pages
in the document is not available.

Ghostscript cannot determine the number of pages in the PostScript file
before finishing the file. Patching the TIFF file at the end is not
always possible - the output device may not be seekable.

The TIFF file doesn't violate the spec, and improvements are difficult
(or impossible) to implement. Closing the bug report as "won't fix".
Comment 2 Alex Cherepanov 2011-07-13 05:21:58 UTC 
Ghostscript has a new TIFF device based on libtiff but all statements from the
comment #1 still hold.

Besides, there were no other requests to add a total number of pages to the
generated tiff.