nth_channel_deref_fn< SrcP > Struct Template Reference

Function object that returns a grayscale reference of the N-th channel of a given reference. Models: PixelDereferenceAdaptorConcept.If the input is a pixel value or constant reference, the function object is immutable. Otherwise it is mutable (and returns non-const reference to the n-th channel) More...

#include <image_view_factory.hpp>

Public Types
typedef nth_channel_deref_fn < const_ref_t >	const_t
typedef pixel_value_type < channel_t, gray_layout_t > ::type	value_type
typedef pixel_reference_type < channel_t, gray_layout_t, false, false >::type	const_reference
typedef SrcP	argument_type
typedef mpl::if_c< is_mutable, ref_t, value_type >::type	reference
typedef reference	result_type

Public Member Functions
	BOOST_STATIC_CONSTANT (bool, is_mutable=pixel_is_reference< SrcP >::value &&pixel_reference_is_mutable< SrcP >::value)
	nth_channel_deref_fn (int n=0)
template<typename P >
	nth_channel_deref_fn (const nth_channel_deref_fn< P > &d)
result_type	operator() (argument_type srcP) const

Public Attributes
int	_n

Detailed Description

template<typename SrcP>
struct boost::gil::detail::nth_channel_deref_fn< SrcP >

Function object that returns a grayscale reference of the N-th channel of a given reference. Models: PixelDereferenceAdaptorConcept.

If the input is a pixel value or constant reference, the function object is immutable. Otherwise it is mutable (and returns non-const reference to the n-th channel)

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The documentation for this struct was generated from the following file:

• image_view_factory.hpp