Re: [boost] [GIL] Pixel Layout Padding?

Subject: Re: [boost] [GIL] Pixel Layout Padding?
From: Christian Henning (chhenning_at_[hidden])
Date: 2013-12-26 12:19:32

I'm sure you thought of it but for now could you use RGBA? Probably not,
but what would an alignment of 4 refer to? Is it size in bytes or channels?
Could you describe a use case?

Regards,
Christian

On Thu, Dec 26, 2013 at 10:21 AM, TONGARI J <tongari95_at_[hidden]> wrote:

> 2013/12/26 TONGARI J <tongari95_at_[hidden]>
>
> > Hi there,
> >
> > The current gil::pixel design has a deficiency that you can't specify the
> > align of pixel, for example, you can't have an RGBX pixel in GIL where X
> is
> > padding.
> >
> > An alternative is to introduce a dummy channel for X, but that doesn't
> > seem to be a good idea as we don't want to mess up the color space.
> >
> > So, maybe it'd be better to extend the current design, say,
> > pixel<ChannelValue, Layout>, to something like pixel<ChannelValue,
> Layout,
> > Align>.
> >
> > Then we can specify RGBX as pixel<uint8_t, rgb_layout_t, 4>, or XRGB as
> > pixel<uint8_t, rgb_layout_t, -4> where minus means left justify.
> >
>
> Sorry, I mean RGBX as pixel<uint8_t, rgb_layout_t, -4>; XRGB as
> pixel<uint8_t, rgb_layout_t, 4>, apparently I'm confused by myself :p
>
>
>
> > Ideas?
> >
>
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