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November 2004

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2004.11.04 06:42 "N TIFFTAG_TRANSFERFUNCTION", by Kai-uwe Behrmann

2004.11.04 08:21 "Re: N TIFFTAG_TRANSFERFUNCTION", by Kai-uwe Behrmann

2004.11.04 08:38 "Re: N TIFFTAG_TRANSFERFUNCTION", by Ross A Finlayson

2004.11.04 09:00 "Re: N TIFFTAG_TRANSFERFUNCTION", by Kai-uwe Behrmann

2004.11.04 08:21 "Re: N TIFFTAG_TRANSFERFUNCTION", by Kai-uwe Behrmann

Thanks, have found it. Testing of the pointers for zero should do.

if (TIFFGetField (tiff, TIFFTAG_TRANSFERFUNCTION,
                  &r_uint16, &g_uint16, &b_uin16) )
    if (r_uin16)
        // there is at least one kurve
    if (r_uint16 && g_uin16 && b_uint16)
        // there are 3 curves

regards
Kai-Uwe Behrmann
                                + imaging development / panoramas
                                + color management
                                + email: ku.b@gmx.de