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00001 /* 00002 Copyright 2007-2008 Andreas Pokorny 00003 Use, modification and distribution are subject to the Boost Software License, 00004 Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at 00005 http://www.boost.org/LICENSE_1_0.txt). 00006 */ 00007 00008 /*************************************************************************************************/ 00009 00010 00011 #ifndef BOOST_GIL_GRAY_ALPHA_HPP_INCLUDED 00012 #define BOOST_GIL_GRAY_ALPHA_HPP_INCLUDED 00013 00014 //////////////////////////////////////////////////////////////////////////////////////// 00015 /// \file 00016 /// \brief 00017 /// \author Andreas Pokorny \n 00018 /// 00019 /// \date 2007-2008 \n 00020 /// 00021 //////////////////////////////////////////////////////////////////////////////////////// 00022 00023 #include <boost/gil/gil_config.hpp> 00024 #include <boost/mpl/contains.hpp> 00025 #include <boost/gil/gray.hpp> 00026 #include <boost/gil/typedefs.hpp> 00027 00028 namespace boost { namespace gil { 00029 00030 typedef mpl::vector2<gray_color_t,alpha_t> gray_alpha_t; 00031 00032 typedef layout<gray_alpha_t> gray_alpha_layout_t; 00033 typedef layout<gray_alpha_layout_t, mpl::vector2_c<int,1,0> > alpha_gray_layout_t; 00034 00035 GIL_DEFINE_BASE_TYPEDEFS(8, alpha_gray) 00036 GIL_DEFINE_BASE_TYPEDEFS(8s, alpha_gray) 00037 GIL_DEFINE_BASE_TYPEDEFS(16, alpha_gray) 00038 GIL_DEFINE_BASE_TYPEDEFS(16s,alpha_gray) 00039 GIL_DEFINE_BASE_TYPEDEFS(32 ,alpha_gray) 00040 GIL_DEFINE_BASE_TYPEDEFS(32s,alpha_gray) 00041 GIL_DEFINE_BASE_TYPEDEFS(32f,alpha_gray) 00042 00043 GIL_DEFINE_ALL_TYPEDEFS(8, gray_alpha) 00044 GIL_DEFINE_ALL_TYPEDEFS(8s, gray_alpha) 00045 GIL_DEFINE_ALL_TYPEDEFS(16, gray_alpha) 00046 GIL_DEFINE_ALL_TYPEDEFS(16s,gray_alpha) 00047 GIL_DEFINE_ALL_TYPEDEFS(32 ,gray_alpha) 00048 GIL_DEFINE_ALL_TYPEDEFS(32s,gray_alpha) 00049 GIL_DEFINE_ALL_TYPEDEFS(32f,gray_alpha) 00050 00051 /// \ingroup ColorConvert 00052 /// \brief Gray Alpha to RGBA 00053 template <> 00054 struct default_color_converter_impl<gray_alpha_t,rgba_t> { 00055 template <typename P1, typename P2> 00056 void operator()(const P1& src, P2& dst) const { 00057 get_color(dst,red_t()) = 00058 channel_convert<typename color_element_type<P2, red_t>::type>(get_color(src,gray_color_t())); 00059 get_color(dst,green_t())= 00060 channel_convert<typename color_element_type<P2, green_t>::type>(get_color(src,gray_color_t())); 00061 get_color(dst,blue_t()) = 00062 channel_convert<typename color_element_type<P2, blue_t>::type>(get_color(src,gray_color_t())); 00063 get_color(dst,alpha_t()) = 00064 channel_convert<typename color_element_type<P2, alpha_t>::type>(get_color(src,alpha_t())); 00065 } 00066 }; 00067 00068 template <> 00069 struct default_color_converter_impl<gray_alpha_t,rgb_t> { 00070 template <typename P1, typename P2> 00071 void operator()(const P1& src, P2& dst) const { 00072 get_color(dst,red_t()) = 00073 channel_convert<typename color_element_type<P2, red_t>::type>( 00074 channel_multiply(get_color(src,gray_color_t()),get_color(src,alpha_t()) ) 00075 ); 00076 get_color(dst,green_t()) = 00077 channel_convert<typename color_element_type<P2, green_t>::type>( 00078 channel_multiply(get_color(src,gray_color_t()),get_color(src,alpha_t()) ) 00079 ); 00080 get_color(dst,blue_t()) = 00081 channel_convert<typename color_element_type<P2, blue_t>::type>( 00082 channel_multiply(get_color(src,gray_color_t()),get_color(src,alpha_t()) ) 00083 ); 00084 } 00085 }; 00086 00087 template <> 00088 struct default_color_converter_impl<gray_alpha_t,gray_t> { 00089 template <typename P1, typename P2> 00090 void operator()(const P1& src, P2& dst) const { 00091 get_color(dst,gray_color_t()) = 00092 channel_convert<typename color_element_type<P2, gray_color_t>::type>( 00093 channel_multiply(get_color(src,gray_color_t()),get_color(src,alpha_t()) ) 00094 ); 00095 } 00096 }; 00097 00098 } // gil 00099 } // boost 00100 00101 #endif // BOOST_GIL_GRAY_ALPHA_HPP_INCLUDED
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