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