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October 2004
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2004.10.18 13:31 "Re: Fwd: How can I manually set the StripOffsets and StripCounts fields?", by Frank Warmerdam
Sachin Garg wrote:
> #. A possible solution I can think of is to create dummy Offsets and
> ByteCounts fields (with values 0) in the tiff directory when I am
> writting only the tags. This way the ReadDir routine wont fail when I
> read in the file.
>
> I couldnt figure-out how to create these dummy tags. I tried
> TIFFGrowStrips but I guess thatz not what I need to do. How can I
> create these dummy tags?
Sachin,
I believe the TIFFWriteCheck() function will ensure that a zeroed
set of image offset/size tags gets written. I do this routinely in
my software. The TIFFWriteCheck() function isn't documented in the man
pages, and is mainly intended for internal use. I call it like this:
TIFFWriteCheck( hTIFF, TIFFIsTiled(hTIFF), "GTiffDataset::Crystalize");
> (And later when I will be writting the actual image data using other
> tiffcp's routines like writeBufferToContigStrips etc... I hope the
> dummy tags will get overwritten with correct values, or will I have to
> do something else for that?)
Yes, this should work fine.
Best regards,
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