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>
45 std::is_same<C1, C2>::value,
46 "default_color_converter_impl not specialized for given color spaces");
53 template <
typename P1,
typename P2>
54 void operator()(
const P1& src, P2& dst)
const {
64 template <
typename RedChannel,
typename GreenChannel,
typename BlueChannel,
typename GrayChannelValue>
66 GrayChannelValue operator()(
const RedChannel& red,
const GreenChannel& green,
const BlueChannel& blue)
const {
67 return channel_convert<GrayChannelValue>(
float32_t(
68 channel_convert<float32_t>(red )*0.30f +
69 channel_convert<float32_t>(green)*0.59f +
70 channel_convert<float32_t>(blue )*0.11f) );
75 template <
typename GrayChannelValue>
77 GrayChannelValue operator()(uint8_t red, uint8_t green, uint8_t blue)
const {
78 return channel_convert<GrayChannelValue>(uint8_t(
79 ((uint32_t(red )*4915 + uint32_t(green)*9667 + uint32_t(blue )*1802) + 8192) >> 14));
83 template <
typename GrayChannel,
typename RedChannel,
typename GreenChannel,
typename BlueChannel>
84 typename channel_traits<GrayChannel>::value_type rgb_to_luminance(
const RedChannel& red,
const GreenChannel& green,
const BlueChannel& blue) {
85 return rgb_to_luminance_fn<RedChannel,GreenChannel,BlueChannel,
86 typename channel_traits<GrayChannel>::value_type>()(red,green,blue);
95 template <
typename P1,
typename P2>
96 void operator()(
const P1& src, P2& dst)
const {
112 template <
typename P1,
typename P2>
113 void operator()(
const P1& src, P2& dst)
const {
115 channel_traits<typename color_element_type<P2, cyan_t >::type>::min_value();
117 channel_traits<typename color_element_type<P2, magenta_t>::type>::min_value();
119 channel_traits<typename color_element_type<P2, yellow_t >::type>::min_value();
129 template <
typename P1,
typename P2>
130 void operator()(
const P1& src, P2& dst)
const {
132 detail::rgb_to_luminance<typename color_element_type<P2,gray_color_t>::type>(
158 template <
typename SrcPixel,
typename DstPixel>
159 void operator()(SrcPixel
const& src, DstPixel& dst)
const 170 dst_t
const k = (std::min)(c, (std::min)(m, y));
174 dst_t
const dst_max = channel_traits<dst_t>::max_value();
175 dst_t
const s_div = dst_max - k;
178 double const s = dst_max / static_cast<double>(s_div);
202 template <
typename P1,
typename P2>
203 void operator()(
const P1& src, P2& dst)
const {
206 channel_convert<typename color_element_type<P2,red_t>::type>(
208 (std::min)(channel_traits<T1>::max_value(),
211 channel_convert<typename color_element_type<P2,green_t>::type>(
213 (std::min)(channel_traits<T1>::max_value(),
216 channel_convert<typename color_element_type<P2,blue_t>::type>(
218 (std::min)(channel_traits<T1>::max_value(),
230 template <
typename P1,
typename P2>
231 void operator()(
const P1& src, P2& dst)
const {
233 channel_convert<typename color_element_type<P2,gray_color_t>::type>(
236 detail::rgb_to_luminance<
typename color_element_type<P1,black_t>::type>(
248 template <
typename Pixel>
253 template <
typename Pixel>
254 auto alpha_or_max_impl(Pixel
const&, std::false_type) ->
typename channel_type<Pixel>::type
256 return channel_traits<typename channel_type<Pixel>::type>::max_value();
262 template <
typename Pixel>
263 auto alpha_or_max(Pixel
const& p) ->
typename channel_type<Pixel>::type
265 return detail::alpha_or_max_impl(
267 mp11::mp_contains<
typename color_space_type<Pixel>::type, alpha_t>());
273 template <
typename C1>
275 template <
typename P1,
typename P2>
276 void operator()(
const P1& src, P2& dst)
const {
293 template <
typename C2>
295 template <
typename P1,
typename P2>
296 void operator()(
const P1& src, P2& dst)
const {
310 template <
typename P1,
typename P2>
311 void operator()(
const P1& src, P2& dst)
const {
323 template <
typename SrcP,
typename DstP>
324 void operator()(
const SrcP& src,DstP& dst)
const {
325 using SrcColorSpace =
typename color_space_type<SrcP>::type;
326 using DstColorSpace =
typename color_space_type<DstP>::type;
335 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:336
red * .3 + green * .59 + blue * .11 + .5
Definition: color_convert.hpp:65
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:322