[Gdal-dev] Problem with Gtiff creation on Solaris

[Frédéric Trastour]

Hello,

I can't generate valid Tiff Files with gdal_translate (GDAL 1.3.0 configured
with the internal TIFF and GeoTIFF libraries).

I have seen similar messages on the list, but no solution...

A file is generated but not recognised by any application.

If I examine the output file and compare it to the valid output of a working
1.1.9 gdal release, it seems
that the file doesn't have a valid "magic number" (first bytes of the files).

I have traced an execution into ddd and I think that :
    - A correct header in written first to the file - in TIFFOpenClient,
    - Then image data are written to the beginning of the file ( overwritting
the good header ).
      In my example (1x1 pixel gray image) this happens in TIFFAppendToStrip
called by TIFFFlush
      in GTiffCreateCopy.
      I don't know why, but the call to TIFFSeekFile(...SEEK_END) in
tif_write:677 retuns 0 instead
     of the amount of data already written the file, so the image data are
written at pos 0 and overwrite
     the header.

I can't understand why the SeekFile returns 0 as it occurs after a write
operation. I have not seen any
other operations which may change the current position ( but I am probably
missing something...).

Does this configuration 1.3.0 with internal libraries works on other systems (
linux, windows ) ?
In a first time I suspected something related to byte ordering or large file
support.

Any ideas or comments appreciated.

Frédéric.

Sorry for my english probably full of syntax errors...

_________________________________________________________________
Frédéric Trastour - SpacEyes - dev at spaceyes.fr