Generic Image Library : rgba.hpp Source File

00001 /*
00002     Copyright 2005-2007 Adobe Systems Incorporated
00003    
00004     Use, modification and distribution are subject to the Boost Software License,
00005     Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
00006     http://www.boost.org/LICENSE_1_0.txt).
00007 
00008     See http://opensource.adobe.com/gil for most recent version including documentation.
00009 */
00010 /*************************************************************************************************/
00011 
00012 #ifndef GIL_RGBA_H
00013 #define GIL_RGBA_H
00014 
00022 
00023 #include "gil_config.hpp"
00024 #include <boost/mpl/contains.hpp>
00025 #include "rgb.hpp"
00026 #include "planar_pixel_iterator.hpp"
00027 
00028 namespace boost { namespace gil {
00029 
00032 struct alpha_t {};    
00033 
00035 typedef mpl::vector4<red_t,green_t,blue_t,alpha_t> rgba_t;
00036 
00038 typedef layout<rgba_t> rgba_layout_t;
00040 typedef layout<rgba_t, mpl::vector4_c<int,2,1,0,3> > bgra_layout_t;
00042 typedef layout<rgba_t, mpl::vector4_c<int,1,2,3,0> > argb_layout_t;
00044 typedef layout<rgba_t, mpl::vector4_c<int,3,2,1,0> > abgr_layout_t;
00045 
00048 template <typename IC>
00049 inline
00050 typename type_from_x_iterator<planar_pixel_iterator<IC,rgba_t> >::view_t
00051 planar_rgba_view(int width, int height,
00052                  IC r, IC g, IC b, IC a,
00053                  std::ptrdiff_t rowsize_in_bytes) {
00054     typedef typename type_from_x_iterator<planar_pixel_iterator<IC,rgba_t> >::view_t RView;
00055     return RView(width, height,
00056                  typename RView::locator(planar_pixel_iterator<IC,rgba_t>(r,g,b,a),
00057                                          rowsize_in_bytes));
00058 }
00059 
00060 } }  // namespace boost::gil
00061 
00062 #endif