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

13 Jan 2010


      Okay, I see.
But the problem is that I don't know the pixel number of channel. It have to
be full generic.
That's why I am trying this (unsuccessfully):
    comp_pixel_t black;
    color_convert( bgil::gray8_pixel_t( 0 ), black );
    fill_pixels( tmpv, black);

2010/1/13 Christian Henning 
...
Please use:
fill_pixels( tmpv, comp_pixel_t( 0.f, 0.f, 0.f ));
This call wont be a memset unfortunately. But you could always just
get the char* and memset yourself.
Regards,
Christian
On Wed, Jan 13, 2010 at 11:40 AM, Eloi Du Bois 
wrote:
...
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
...
comp_pixel_t;
        typedef image
comp_image_t;
        typedef typename view_type_from_pixel::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 
...
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 
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@lists.boost.org
http://lists.boost.org/mailman/listinfo.cgi/boost-users
_______________________________________________
Boost-users mailing list
Boost-users@lists.boost.org
http://lists.boost.org/mailman/listinfo.cgi/boost-users
_______________________________________________
Boost-users mailing list
Boost-users@lists.boost.org
http://lists.boost.org/mailman/listinfo.cgi/boost-users
_______________________________________________
Boost-users mailing list
Boost-users@lists.boost.org
http://lists.boost.org/mailman/listinfo.cgi/boost-users