Re: [boost] [gil new_io] tiff alpha channel support

Subject: Re: [boost] [gil new_io] tiff alpha channel support
From: Erik (ice.rikh_at_[hidden])
Date: 2011-04-22 17:17:29

You're responsive by my standards.

On Tue, Apr 19, 2011 at 10:27 AM, Christian Henning <chhenning_at_[hidden]>wrote:

> Hi Erik, thanks for using the new gil::io. Sorry for not getting back
> to you sooner.
>
>
> On Sun, Apr 17, 2011 at 6:36 PM, Erik Hvatum <ice.rikh_at_[hidden]> wrote:
> > Briefly:
> >
> > gil new_io does not support tiff alpha channel.  Is support planned?  If
> not, I'll attempt to add it and submit a patch if successful.
>
> Before going into details can you tell what your
> PhotometricInterpretation value is? See here:
>
>
> http://www.awaresystems.be/imaging/tiff/tifftags/photometricinterpretation.html
>
> Using this value will decide what color space an image is in.
>
>
PHOTOMETRIC_RGB

>
> >
> > Details:
> >
> > I am using the latest code from the gil-contributions googlecode SVN
> repository.  The following causes a crash when "tifffile.tif" is interleaved
> 32-bit rgba (ie 8*4 bits, including the alpha channel):
>
> Could you send me the tifffile.tif or something of similar format?
> That would help me hugely.
>

 It's tiny; hopefully I'm not breaking anything by sending it to the list.

Thanks,
Erik