rgba.hpp

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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 <cstddef>
00024 #include "gil_config.hpp"
00025 #include <boost/mpl/contains.hpp>
00026 #include "rgb.hpp"
00027 #include "planar_pixel_iterator.hpp"
00028 
00029 namespace boost { namespace gil {
00030 
00033 struct alpha_t {};    
00034 
00036 typedef mpl::vector4<red_t,green_t,blue_t,alpha_t> rgba_t;
00037 
00039 typedef layout<rgba_t> rgba_layout_t;
00041 typedef layout<rgba_t, mpl::vector4_c<int,2,1,0,3> > bgra_layout_t;
00043 typedef layout<rgba_t, mpl::vector4_c<int,1,2,3,0> > argb_layout_t;
00045 typedef layout<rgba_t, mpl::vector4_c<int,3,2,1,0> > abgr_layout_t;
00046 
00049 template <typename IC>
00050 inline
00051 typename type_from_x_iterator<planar_pixel_iterator<IC,rgba_t> >::view_t
00052 planar_rgba_view(std::size_t width, std::size_t height,
00053                  IC r, IC g, IC b, IC a,
00054                  std::ptrdiff_t rowsize_in_bytes) {
00055     typedef typename type_from_x_iterator<planar_pixel_iterator<IC,rgba_t> >::view_t RView;
00056     return RView(width, height,
00057                  typename RView::locator(planar_pixel_iterator<IC,rgba_t>(r,g,b,a),
00058                                          rowsize_in_bytes));
00059 }
00060 
00061 } }  // namespace boost::gil
00062 
00063 #endif