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May 2008
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2008.05.24 15:34 "Re: Unitialized Variable Caused a Problem in TIFFCP", by Bob Friesenhahn
On Fri, 23 May 2008, Gene Amtower wrote: > I can't share any of the files because they're customer material, but > here's a copy of the tiffinfo output from one of them... > > TIFF Directory at offset 0x2267c > Subfile Type: (0 = 0x0) > Image Width: 6904 Image Length: 4888 > Resolution: 200, 200 pixels/inch > Compression Scheme: CCITT Group 4 > Photometric Interpretation: min-is-white > FillOrder: msb-to-lsb > Make: "Alpharel Incorporated" > Model: "optirastoras" > Orientation: row 0 top, col 0 lhs > Rows/Strip: 4888 > Planar Configuration: single image plane > Software: optirastoras: 1.6.5(beta), 2 I don't see any samples-per-pixel tag in the above output so I expect that the reported libtiff defect is due to using the wrong interface to obtain the tag. The TIFFGetFieldDefaulted() function should be used rather than TIFFGetField(). If TIFFGetField() is used, then it is necessary to verify that the return value is 1 before deciding to use the result. > that's typical, and that's really my question to the list. As TIFF > users, does anyone else see this situation--images that don't have a > samples/pixel tag? I think it only causes a problem with the transform This seems to be quite rare, and perhaps violates the TIFF specification. > You mentioned that 3.8.2 is old? That doesn't seem too far from 3.9.0, > so has the package been dormant for a little while, or just in an > enhancement-bake mode of operation? I guess I should go download the > 3.9.0beta code just to see what's different. 3.9.0beta contains important bug fixes. The focus has been on libtiff 4.0, which is a feature release (BigTIFF support). Bob ====================================== Bob Friesenhahn bfriesen@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/