Re: [Boost-users] [GIL] Black filled or not ?

Subject: Re: [Boost-users] [GIL] Black filled or not ?
From: Eloi Du Bois (eloi.du.bois_at_[hidden])
Date: 2010-01-13 11:40:41

I tried to do a fill_pixels, but the thing is I get an error (because I am
doing special things) on something like this:

        typedef pixel<bits32f, devicen_layout_t< num_channels<View>::value >
> comp_pixel_t;
        typedef image<comp_pixel_t, false, std::allocator<unsigned char> >
comp_image_t;
        typedef typename view_type_from_pixel<comp_pixel_t>::type
comp_view_t;
        typedef typename comp_view_t::x_iterator tmp_iterator;

        comp_image_t itmp( dst.dimensions( ) );
        comp_view_t tmpv( view( itmp ) );
        fill_pixels(tmpv, 0);

But this is not working...

Anyway,
thank you
Eloi.

2010/1/13 Christian Henning <chhenning_at_[hidden]>

> Hi Eloi, for performance reasons gil is not initializing the array
> with a default value. Also, I wouldn't trust the compiler to do
> anything special since it might be different from platform to
> platform. Just call fill_pixels which in your case ( rgb32f_image_t )
> should be reduced to a memset call.
>
> Regards,
> Christian
>
> On Wed, Jan 13, 2010 at 7:37 AM, Eloi Du Bois <eloi.du.bois_at_[hidden]>
> wrote:
> > Hi all !
> >
> > I would like to know, when creating an image like that:
> > rgb32f_image_t img(w, h);
> >
> > is the image filled with 0 by default or should I call fill_pixels ?
> >
> > Thank you !
> > Eloi.
> >
> > _______________________________________________
> > Boost-users mailing list
> > Boost-users_at_[hidden]
> > http://lists.boost.org/mailman/listinfo.cgi/boost-users
> >
> _______________________________________________
> Boost-users mailing list
> Boost-users_at_[hidden]
> http://lists.boost.org/mailman/listinfo.cgi/boost-users
>