channel_multiply

Multiplying unsigned channel values of the same type. More...

Classes
struct	boost::gil::channel_multiplier_unsigned< ChannelValue >
	This is the default implementation. Performance specializatons are provided. More...
struct	boost::gil::channel_multiplier_unsigned< bits8 >
	Specialization of channel_multiply for 8-bit unsigned channels. More...
struct	boost::gil::channel_multiplier_unsigned< bits16 >
	Specialization of channel_multiply for 16-bit unsigned channels. More...
struct	boost::gil::channel_multiplier_unsigned< bits32f >
	Specialization of channel_multiply for float 0..1 channels. More...
struct	boost::gil::channel_multiplier< ChannelValue >
	A function object to multiply two channels. result = a * b / max_value. More...

Functions
template<typename Channel >
channel_traits< Channel > ::value_type	boost::gil::channel_multiply (Channel a, Channel b)
	A function multiplying two channels. result = a * b / max_value. More...

Detailed Description

Multiplying unsigned channel values of the same type.

Performs scaled multiplication result = a * b / max_value

Example:

bits8 x=128;
bits8 y=128;
bits8 mul = channel_multiply(x,y);
assert(mul == 64);    // 64 = 128 * 128 / 255

Function Documentation

template<typename Channel >

channel_traits<Channel>::value_type boost::gil::channel_multiply ( Channel  a, Channel  b  )

inline

#include <boost_1_57_0/boost/gil/channel_algorithm.hpp>

A function multiplying two channels. result = a * b / max_value.

Referenced by boost::gil::default_color_converter_impl< cmyk_t, gray_t >::operator()(), and boost::gil::default_color_converter_impl< rgba_t, C2 >::operator()().