It may be that, given that libtiff doesn't support it, OIIO's tiff output needs
to handle the case more gracefully to avoid any crashes.
-- lg
On Nov 12, 2014, at 8:02 AM, Larry Gritz <[email protected]> wrote:
> Although the TIFF format allows it, I believe that libtiff doesn't support
> mixed channel types.
>
>
>
> On November 12, 2014 7:38:21 AM PST, Michel Lerenard
> <[email protected]> wrote:
> Hi,
>
> I'm experiencing crashes when trying to write TIFF file in which
> channels do not all have the same pixel format. I'm trying to mix UINT8,
> UINT16 and UINT32 format.
>
>
> #1 0x00007ffff2bd1e59 in PredictorEncodeTile ()
> from /home/michel/[...]/libOpenImageIO.so.1.5
> (gdb)
> #2 0x00007ffff2bb9cc3 in TIFFWriteEncodedTile ()
> from from /home/michel/[...]/libOpenImageIO.so.1.5
> (gdb)
> #3 0x00007ffff2bb9921 in TIFFWriteTile ()
> from from /home/michel/[...]/libOpenImageIO.so.1.5
> (gdb)
> #4 0x00007ffff2b30b0d in OpenImageIO::v1_5::TIFFOutput::write_tile(int,
> int, int, OpenImageIO::v1_5::TypeDesc, void const*, long, long, long) ()
> from from /home/michel/[...]/libOpenImageIO.so.1.5
>
>
> I'm wondering if
> what I'm doing is allowed ? It does work for OpenEXR
> (at least using the last 2.2 version).
>
>
> For information, here's the content of the spec.channeformat array:
> spec.channelformats[0] = uint8
> spec.channelformats[1] = uint8
> spec.channelformats[2] = uint8
> spec.channelformats[3] = uint8
> spec.channelformats[4] = uint
> spec.channelformats[5] = uint
> spec.channelformats[6] = uint
> spec.channelformats[7] = uint
> spec.channelformats[8] = uint
> spec.channelformats[9] = uint
> spec.channelformats[10] = uint
> spec.channelformats[11] = uint
> spec.channelformats[12] = uint
> spec.channelformats[13] = uint
> spec.channelformats[14] = uint
> spec.channelformats[15] = uint
> spec.channelformats[16] = uint
> spec.channelformats[17] = uint
> spec.channelformats[18] = uint
> spec.channelformats[19] = uint
> spec.channelformats[20] = uint
> spec.channelformats[21] = uint
> spec.channelformats[22] = uint
> spec.channelformats[23] = uint
> spec.channelformats[24] = uint
> spec.channelformats[25] = uint
> spec.channelformats[26] = uint
> spec.channelformats[27] = uint
> spec.channelformats[28] = uint
> spec.channelformats[29] = uint
> spec.channelformats[30] = uint
> spec.channelformats[31] = uint
> spec.channelformats[32] = uint
> spec.channelformats[33] = uint
> spec.channelformats[34] = uint
> spec.channelformats[35] = uint
> spec.channelformats[36] = uint
> spec.channelformats[37] = uint
> spec.channelformats[38] = uint
> spec.channelformats[39] = uint
> spec.channelformats[40] = uint16
> spec.channelformats[41] = uint16
> spec.channelformats[42] = uint16
> spec.channelformats[43] = uint
>
>
> Any help is appreciated, I can't find info about pixel format in TIFF.
>
> Michel
>
> Oiio-dev mailing list
> [email protected]
> http://lists.openimageio.org/listinfo.cgi/oiio-dev-openimageio.org
>
> --
> Larry Gritz
> [email protected]
> _______________________________________________
> Oiio-dev mailing list
> [email protected]
> http://lists.openimageio.org/listinfo.cgi/oiio-dev-openimageio.org
--
Larry Gritz
[email protected]
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