8 #ifndef BOOST_GIL_COLOR_CONVERT_HPP     9 #define BOOST_GIL_COLOR_CONVERT_HPP    11 #include <boost/gil/channel_algorithm.hpp>    12 #include <boost/gil/cmyk.hpp>    13 #include <boost/gil/color_base_algorithm.hpp>    14 #include <boost/gil/gray.hpp>    15 #include <boost/gil/metafunctions.hpp>    16 #include <boost/gil/pixel.hpp>    17 #include <boost/gil/rgb.hpp>    18 #include <boost/gil/rgba.hpp>    19 #include <boost/gil/utilities.hpp>    23 #include <type_traits>    25 namespace boost { 
namespace gil {
    41 template <
typename C1, 
typename C2>
    48     template <
typename P1, 
typename P2>
    49     void operator()(
const P1& src, P2& dst)
 const {
    59 template <
typename RedChannel, 
typename GreenChannel, 
typename BlueChannel, 
typename GrayChannelValue>
    61     GrayChannelValue operator()(
const RedChannel& red, 
const GreenChannel& green, 
const BlueChannel& blue)
 const {
    62         return channel_convert<GrayChannelValue>(
float32_t(
    63             channel_convert<float32_t>(red  )*0.30f +
    64             channel_convert<float32_t>(green)*0.59f +
    65             channel_convert<float32_t>(blue )*0.11f) );
    70 template <
typename GrayChannelValue>
    72     GrayChannelValue operator()(uint8_t red, uint8_t green, uint8_t blue)
 const {
    73         return channel_convert<GrayChannelValue>(uint8_t(
    74             ((uint32_t(red  )*4915 + uint32_t(green)*9667 + uint32_t(blue )*1802) + 8192) >> 14));
    78 template <
typename GrayChannel, 
typename RedChannel, 
typename GreenChannel, 
typename BlueChannel>
    79 typename channel_traits<GrayChannel>::value_type rgb_to_luminance(
const RedChannel& red, 
const GreenChannel& green, 
const BlueChannel& blue) {
    80     return rgb_to_luminance_fn<RedChannel,GreenChannel,BlueChannel,
    81                                typename channel_traits<GrayChannel>::value_type>()(red,green,blue);
    90     template <
typename P1, 
typename P2>
    91     void operator()(
const P1& src, P2& dst)
 const {
   105     template <
typename P1, 
typename P2>
   106     void operator()(
const P1& src, P2& dst)
 const {
   108             channel_traits<typename color_element_type<P2, cyan_t   >::type>::min_value();
   110             channel_traits<typename color_element_type<P2, magenta_t>::type>::min_value();
   112             channel_traits<typename color_element_type<P2, yellow_t >::type>::min_value();
   122     template <
typename P1, 
typename P2>
   123     void operator()(
const P1& src, P2& dst)
 const {
   125             detail::rgb_to_luminance<typename color_element_type<P2,gray_color_t>::type>(
   141     template <
typename P1, 
typename P2>
   142     void operator()(
const P1& src, P2& dst)
 const {
   152             float x1 = channel_traits<T2>::max_value()/float(x);
   170     template <
typename P1, 
typename P2>
   171     void operator()(
const P1& src, P2& dst)
 const {
   174             channel_convert<typename color_element_type<P2,red_t>::type>(
   176                     (std::min)(channel_traits<T1>::max_value(),
   179             channel_convert<typename color_element_type<P2,green_t>::type>(
   181                     (std::min)(channel_traits<T1>::max_value(),
   184             channel_convert<typename color_element_type<P2,blue_t>::type>(
   186                     (std::min)(channel_traits<T1>::max_value(),
   198     template <
typename P1, 
typename P2>
   199     void operator()(
const P1& src, P2& dst)
 const  {
   201             channel_convert<typename color_element_type<P2,gray_color_t>::type>(
   204                        detail::rgb_to_luminance<
typename color_element_type<P1,black_t>::type>(
   216 template <
typename Pixel>
   221 template <
typename Pixel>
   222 auto alpha_or_max_impl(Pixel 
const&, std::false_type) -> 
typename channel_type<Pixel>::type
   224     return channel_traits<typename channel_type<Pixel>::type>::max_value();
   230 template <
typename Pixel>
   231 auto alpha_or_max(Pixel 
const& p) -> 
typename channel_type<Pixel>::type
   233     return detail::alpha_or_max_impl(
   235         mp11::mp_contains<
typename color_space_type<Pixel>::type, alpha_t>());
   241 template <
typename C1>
   243     template <
typename P1, 
typename P2>
   244     void operator()(
const P1& src, P2& dst)
 const {
   261 template <
typename C2>
   263     template <
typename P1, 
typename P2>
   264     void operator()(
const P1& src, P2& dst)
 const {
   278     template <
typename P1, 
typename P2>
   279     void operator()(
const P1& src, P2& dst)
 const {
   291     template <
typename SrcP, 
typename DstP>
   292     void operator()(
const SrcP& src,DstP& dst)
 const {
   293         using SrcColorSpace = 
typename color_space_type<SrcP>::type;
   294         using DstColorSpace = 
typename color_space_type<DstP>::type;
   303 template <
typename SrcP, 
typename DstP>
 Magenta.
Definition: cmyk.hpp:25
channel_traits< Channel >::value_type channel_invert(Channel x)
Default implementation. Provide overloads for performance.
Definition: channel_algorithm.hpp:559
Represents a pixel value (a container of channels). Models: HomogeneousColorBaseValueConcept,...
Definition: metafunctions.hpp:23
scoped_channel_value< float, float_point_zero< float >, float_point_one< float > > float32_t
32-bit floating point channel type with range [0.0f ... 1.0f]. Models ChannelValueConcept
Definition: typedefs.hpp:124
Yellow.
Definition: cmyk.hpp:28
channel_traits< Channel >::value_type channel_multiply(Channel a, Channel b)
A function multiplying two channels. result = a * b / max_value.
Definition: channel_algorithm.hpp:539
color_element_reference_type< ColorBase, Color >::type get_color(ColorBase &cb, Color=Color())
Mutable accessor to the element associated with a given color name.
Definition: color_base_algorithm.hpp:190
Green.
Definition: rgb.hpp:27
Same as channel_converter, except it takes the destination channel by reference, which allows us to m...
Definition: channel_algorithm.hpp:460
Alpha.
Definition: rgba.hpp:22
Definition: color_convert.hpp:31
Color Convertion function object. To be specialized for every src/dst color space.
Definition: color_convert.hpp:42
Blue.
Definition: rgb.hpp:30
void color_convert(const SrcP &src, DstP &dst)
helper function for converting one pixel to another using GIL default color-converters where ScrP mod...
Definition: color_convert.hpp:304
red * .3 + green * .59 + blue * .11 + .5
Definition: color_convert.hpp:60
Black.
Definition: cmyk.hpp:31
Red.
Definition: rgb.hpp:24
Gray.
Definition: gray.hpp:18
Cyan.
Definition: cmyk.hpp:22
class for color-converting one pixel to another
Definition: color_convert.hpp:290