Re: [Boost-users] [GIL] planar view with different bit depth

Subject: Re: [Boost-users] [GIL] planar view with different bit depth
From: Christian Henning (chhenning_at_[hidden])
Date: 2009-12-21 12:22:41

Hi Eloi,

I have never tried that and I'm not sure if gil is designed to support
such a functionality. Would be cool if you could define such a pixels
type with a tuple ( mpl::vector4<
uint32_t,double32_t,double16_t,uint8_t> ).

But you might be able to create packed_channel_reference types for
each channel. But first you need to provide a 90bits integer type.

packed_channel_reference< uint90_t, 0, 32, 1 >
packed_channel_reference< uint90_t,32, 32, 1 >
packed_channel_reference< uint90_t,64, 16, 1 >
packed_channel_reference< uint90_t,80,  8, 1 >

Such channels you could combine into a pixel type.

Mhmm, the more I think about it the more I have doubts. Hopefully
Lubomir has better ideas. Such funtionality should be part of gil 3.0?

BTW, would you be interested in creating a exr io extension for gil? I
can help you out.

Regards,
Christian

On Mon, Dec 21, 2009 at 11:55 AM, Eloi Du Bois <eloi.du.bois_at_[hidden]> wrote:
> Hi all,
>
> I have a question. I am using gil to read exr image files (movie standard)
> and I would like to know can I make a planar view with n channels of
> different pixel bit depth...
> That sound weird but the exr standard allow users to put channels of
> different types !
> For example:
> R = unsigned int 32
> G = half float
> B = float
> A = byte
>
> Thank you,
> Eloi.
>
>
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