Package: libnetpbm10
Version: 2:10.0-11
Severity: normal
If pnmtotiff is run on a very wide ppm image, it creates creates images with a
tiff tag "RowsPerStripe" equal to zero,
which is clearly invalid. To reproduce, create a (possibly empty) image with
gimp that is wider than 3000 pixels, run
pnmtotiff on it. libtiff will create a warning. *Some* programs might still be
able to load this image.
The bug is in pnmtotiff.c, function computeRasterParm, line 598, where the
number of rows per stripe is computed as follows:
*rowsperstripP = (8 * 1024) / *bytesperrowP;
For overlong lines, this results in the zero value. Suggestion: Change lines
597ff to:
if (requested_rowsperstrip == -1 ) {
*rowsperstripP = (8 * 1024) / *bytesperrowP;
if (*rowsperstripP == 0)
*rowsperstripP = 1;
} else {
*rowsperstripP = requested_rowsperstrip;
}
Regards,
Thomas Richter
--
To UNSUBSCRIBE, email to [EMAIL PROTECTED]
with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
