AWARE SYSTEMS
TIFF and LibTiff Mail List Archive

Thread

2001.02.07 00:52 "Tag types", by Lyle
2001.02.07 17:00 "Re: Tag types", by Frank Warmerdam
2001.02.07 17:26 "Re: Tag types", by Lyle
2001.02.07 17:27 "Re: Tag types", by Helge Blischke

2001.02.07 17:00 "Re: Tag types", by Frank Warmerdam

I'm running the following code:

int32 height = 0;
int32 width = 2048;
. .
.

TIFFSetField(tif, TIFFTAG_IMAGEWIDTH, width);
TIFFSetField(tif, TIFFTAG_IMAGELENGTH, height);

Expecting the tags to be set as longs, but they are being set as short.

Lyle,

Skimming the code I see imagew width and image length are only written as longs if they actually exceed 64K. I assume this is to maintain maximum compatibility with older TIFF readers that only support shorts. Is this a problem for you? I imagine you could fudge this in TIFFWriteDirectory() within tif_dirwrite.c if you really wanted to force longs to be written.

Best regards,

---------------------------------------+--------------------------------------
I set the clouds in motion - turn up   | Frank Warmerdam, warmerdam@pobox.com
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