AWARE SYSTEMS
TIFF and LibTiff Mail List Archive

Thread

2009.02.13 03:24 "[Tiff] TIFFReadRGBAImage w/ 8bit-gray + aplha", by Chris Losinger
2009.02.13 08:50 "Re: [Tiff] TIFFReadRGBAImage w/ 8bit-gray + aplha", by
2009.02.13 17:36 "Re: [Tiff] TIFFReadRGBAImage w/ 8bit-gray + aplha", by Bob Friesenhahn
2009.02.13 21:34 "Re: [Tiff] TIFFReadRGBAImage w/ 8bit-gray + aplha", by Frank Warmerdam

2009.02.13 08:50 "Re: [Tiff] TIFFReadRGBAImage w/ 8bit-gray + aplha", by

Chris,

i've tested with a clean copy of LibTiff v3.7.1, using the code below, and my own slightly tweaked version of v3.8.2 - same crash.

I've tested with current beta of LibTiff 4. Low-level LibTiff (TIFFReadEncodedXxx) does not get into trouble. However, the LibTiff RGBA interface does crash and burn, access violation style, even in version 4.0. At first examination, there's nothing that much out of the ordinary to this image, except that the two channels (MinIsBlack grayscale channel and the pre-calculated alpha channel) are stored planar, not chunky (in LibTiff speak, the tag TIFFTAG_PLANARCONFIG has the value PLANARCONFIG_SEPARATE) which is not all that common but certainly is perfectly legit.

I recommend adding a bugzilla report.

Best regards,

Joris