Generic Image Library : channel_multiply

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# channel_multiply
[Algorithms and Utility Functions]

## 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

## Classes

struct | channel_multiplier_unsigned
| This is the default implementation. Performance specializatons are provided. More...
struct | channel_multiplier_unsigned< bits8 >
| Specialization of channel_multiply for 8-bit unsigned channels. More...
struct | channel_multiplier_unsigned< bits16 >
| Specialization of channel_multiply for 16-bit unsigned channels. More...
struct | channel_multiplier_unsigned< bits32f >
| Specialization of channel_multiply for float 0..1 channels. More...
struct | channel_multiplier
| 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.