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Subject:	TIFFWriteDirectory() fails on network drive
Date:	Fri, 31 Jan 2014 14:17:22 -0600
Message-ID:	<9C9CA6EA23F2394D9A524E7F16235E1201017D85@srv1163ex1.flightsafety.com>
From:	"Hsu, Justine" <Justine DOT Hsu AT FlightSafety DOT com>
To:	<cygwin AT cygwin DOT com>

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The attached program tries to save a blank 64 x 64 TIFF image to specified =
path.
When the path specified is local, the images saves fine.
If the path is on a network drive on a Windows7, then it saves a corrupt fi=
le, even after applying this hotfix http://support.microsoft.com/kb/2732673=
=20
Here is the relevant code:

=A0=A0=A0 =A0=A0=A0=A0const int dim =3D 64;
=A0=A0=A0 =A0=A0=A0=A0const int channels =3D 3;

=A0=A0=A0 =A0=A0=A0=A0TIFF *tif =3D TIFFOpen(argv[1], "w");
=A0=A0=A0=A0=A0=A0=A0 TIFFSetField(tif, TIFFTAG_IMAGEWIDTH,=A0=A0=A0=A0=A0 =
dim);
=A0=A0=A0=A0=A0=A0=A0 TIFFSetField(tif, TIFFTAG_IMAGELENGTH,=A0=A0=A0=A0 di=
m);
=A0=A0=A0=A0=A0=A0=A0 TIFFSetField(tif, TIFFTAG_SAMPLESPERPIXEL, channels);
=A0=A0=A0=A0=A0=A0=A0 TIFFSetField(tif, TIFFTAG_ROWSPERSTRIP,=A0=A0=A0 1);
=A0=A0=A0=A0=A0=A0=A0 TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE,=A0=A0 8);
=A0=A0=A0=A0=A0=A0=A0 TIFFSetField(tif, TIFFTAG_PLANARCONFIG,=A0=A0=A0 1);
=A0=A0=A0=A0=A0=A0=A0 TIFFSetField(tif, TIFFTAG_PHOTOMETRIC,=A0=A0=A0=A0 PH=
OTOMETRIC_RGB);
=A0=A0=A0=A0=A0=A0=A0 TIFFSetField(tif, TIFFTAG_COMPRESSION,=A0=A0=A0=A0 CO=
MPRESSION_LZW);
=A0=A0=A0=A0=A0=A0=A0=20
=A0=A0=A0=A0=A0=A0=A0=A0int i;
=A0=A0=A0=A0=A0=A0=A0 for (i =3D 0; i < dim; i++)
=A0=A0=A0=A0=A0=A0=A0 {
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 TIFFWriteScanline(tif, buf + dim*channels=
*(dim - i - 1), i, 0);
=A0=A0=A0=A0=A0=A0 =A0}

=A0=A0=A0=A0=A0=A0 =A0TIFFWriteDirectory(tif);
=A0=A0=A0=A0=A0=A0=A0 TIFFClose(tif);

Justine

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