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22 <TITLE>Generic Image Library: nth_channel_deref_fn Struct Template Reference
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37 <!-- Generated by Doxygen 1.5.6 -->
38 <div class=
"navpath"><a class=
"el" href=
"namespaceboost.html">boost
</a>::
<b>gil
</b>::
<b>detail
</b>::
<a class=
"el" href=
"g_i_l_0515.html">nth_channel_deref_fn
</a>
40 <div class=
"contents">
41 <h1>nth_channel_deref_fn Struct Template Reference
<br>
43 [
<a class=
"el" href=
"g_i_l_0186.html">Models
</a>]
</small>
44 </h1><!-- doxytag: class="boost::gil::detail::nth_channel_deref_fn" --><code>#include
<<a class=
"el" href=
"g_i_l_0226.html">image_view_factory.hpp
</a>></code>
48 <a href=
"g_i_l_0514.html">List of all members.
</a><hr><a name=
"_details"></a><h2>Detailed Description
</h2>
49 <h3>template
<typename SrcP
><br>
50 struct boost::gil::detail::nth_channel_deref_fn
< SrcP
></h3>
52 Function object that returns a grayscale reference of the N-th channel of a given reference. Models:
<a class=
"el" href=
"g_i_l_0350.html" title=
"Represents a unary function object that can be invoked upon dereferencing a pixel...">PixelDereferenceAdaptorConcept
</a>.
<p>
53 If the input is a
<a class=
"el" href=
"g_i_l_0599.html" title=
"Represents a pixel value (a container of channels). Models: HomogeneousColorBaseValueConcept...">pixel
</a> value or constant reference, the function object is immutable. Otherwise it is mutable (and returns non-const reference to the n-th channel).
<table border=
"0" cellpadding=
"0" cellspacing=
"0">
55 <tr><td colspan=
"2"><br><h2>Public Types
</h2></td></tr>
56 <tr><td class=
"memItemLeft" nowrap
align=
"right" valign=
"top"><a class=
"anchor" name=
"1909fca476c5798593a7ed34e7157fce"></a><!-- doxytag: member="boost::gil::detail::nth_channel_deref_fn::const_t" ref="1909fca476c5798593a7ed34e7157fce" args="" -->
57 typedef
<a class=
"el" href=
"g_i_l_0515.html">nth_channel_deref_fn
</a><br>
58 < const_ref_t
> </td><td class=
"memItemRight" valign=
"bottom"><b>const_t
</b></td></tr>
60 <tr><td class=
"memItemLeft" nowrap
align=
"right" valign=
"top"><a class=
"anchor" name=
"c79ed995e6b4b1d8f459f0b37807e5cb"></a><!-- doxytag: member="boost::gil::detail::nth_channel_deref_fn::value_type" ref="c79ed995e6b4b1d8f459f0b37807e5cb" args="" -->
61 typedef
<a class=
"el" href=
"g_i_l_0606.html">pixel_value_type
</a><br>
62 < channel_t,
<a class=
"el" href=
"g_i_l_0567.html">gray_layout_t
</a> ><br>
63 ::type
</td><td class=
"memItemRight" valign=
"bottom"><b>value_type
</b></td></tr>
65 <tr><td class=
"memItemLeft" nowrap
align=
"right" valign=
"top"><a class=
"anchor" name=
"01ea77e6b19ce255f74eaa354e8cc6c1"></a><!-- doxytag: member="boost::gil::detail::nth_channel_deref_fn::const_reference" ref="01ea77e6b19ce255f74eaa354e8cc6c1" args="" -->
66 typedef
<a class=
"el" href=
"g_i_l_0604.html">pixel_reference_type
</a><br>
67 < channel_t,
<a class=
"el" href=
"g_i_l_0567.html">gray_layout_t
</a>,
<br>
68 false, false
>::type
</td><td class=
"memItemRight" valign=
"bottom"><b>const_reference
</b></td></tr>
70 <tr><td class=
"memItemLeft" nowrap
align=
"right" valign=
"top"><a class=
"anchor" name=
"2ad6c059d39c24be9cddd1905995d23c"></a><!-- doxytag: member="boost::gil::detail::nth_channel_deref_fn::argument_type" ref="2ad6c059d39c24be9cddd1905995d23c" args="" -->
71 typedef SrcP
</td><td class=
"memItemRight" valign=
"bottom"><b>argument_type
</b></td></tr>
73 <tr><td class=
"memItemLeft" nowrap
align=
"right" valign=
"top"><a class=
"anchor" name=
"63a5fc94722c4fbdb03ed0ec51cd89c8"></a><!-- doxytag: member="boost::gil::detail::nth_channel_deref_fn::reference" ref="63a5fc94722c4fbdb03ed0ec51cd89c8" args="" -->
74 typedef mpl::if_c
< is_mutable,
<br>
75 ref_t,
<a class=
"el" href=
"g_i_l_0599.html">value_type
</a> >::type
</td><td class=
"memItemRight" valign=
"bottom"><b>reference
</b></td></tr>
77 <tr><td class=
"memItemLeft" nowrap
align=
"right" valign=
"top"><a class=
"anchor" name=
"fe53618876958e2e15351c19804738f2"></a><!-- doxytag: member="boost::gil::detail::nth_channel_deref_fn::result_type" ref="fe53618876958e2e15351c19804738f2" args="" -->
78 typedef reference
</td><td class=
"memItemRight" valign=
"bottom"><b>result_type
</b></td></tr>
80 <tr><td colspan=
"2"><br><h2>Public Member Functions
</h2></td></tr>
81 <tr><td class=
"memItemLeft" nowrap
align=
"right" valign=
"top"><a class=
"anchor" name=
"f775f083d7bf091fec5c1a27680dc5c8"></a><!-- doxytag: member="boost::gil::detail::nth_channel_deref_fn::BOOST_STATIC_CONSTANT" ref="f775f083d7bf091fec5c1a27680dc5c8" args="(bool, is_mutable=pixel_is_reference< SrcP >::value &&pixel_reference_is_mutable< SrcP >::value)" -->
82 </td><td class=
"memItemRight" valign=
"bottom"><b>BOOST_STATIC_CONSTANT
</b> (bool, is_mutable=
<a class=
"el" href=
"g_i_l_0600.html">pixel_is_reference
</a>< SrcP
>::value
&&<a class=
"el" href=
"g_i_l_0602.html">pixel_reference_is_mutable
</a>< SrcP
>::value)
</td></tr>
84 <tr><td class=
"memItemLeft" nowrap
align=
"right" valign=
"top"><a class=
"anchor" name=
"addab96793b55b507de7b81ba1ddc280"></a><!-- doxytag: member="boost::gil::detail::nth_channel_deref_fn::nth_channel_deref_fn" ref="addab96793b55b507de7b81ba1ddc280" args="(int n=0)" -->
85 </td><td class=
"memItemRight" valign=
"bottom"><b>nth_channel_deref_fn
</b> (int n=
0)
</td></tr>
87 <tr><td class=
"memTemplParams" nowrap
colspan=
"2"><a class=
"anchor" name=
"2030e999de9a2a28201d9bb8c1410835"></a><!-- doxytag: member="boost::gil::detail::nth_channel_deref_fn::nth_channel_deref_fn" ref="2030e999de9a2a28201d9bb8c1410835" args="(const nth_channel_deref_fn< P > &d)" -->
88 template
<typename P
> </td></tr>
89 <tr><td class=
"memTemplItemLeft" nowrap
align=
"right" valign=
"top"> </td><td class=
"memTemplItemRight" valign=
"bottom"><b>nth_channel_deref_fn
</b> (const
<a class=
"el" href=
"g_i_l_0515.html">nth_channel_deref_fn
</a>< P
> &d)
</td></tr>
91 <tr><td class=
"memItemLeft" nowrap
align=
"right" valign=
"top"><a class=
"anchor" name=
"3fbe164ea1c95ff0e87ef3deb8fea603"></a><!-- doxytag: member="boost::gil::detail::nth_channel_deref_fn::operator()" ref="3fbe164ea1c95ff0e87ef3deb8fea603" args="(argument_type srcP) const " -->
92 result_type
</td><td class=
"memItemRight" valign=
"bottom"><b>operator()
</b> (argument_type srcP) const
</td></tr>
94 <tr><td colspan=
"2"><br><h2>Public Attributes
</h2></td></tr>
95 <tr><td class=
"memItemLeft" nowrap
align=
"right" valign=
"top"><a class=
"anchor" name=
"da0e3adfe5f3db62623fb73a49c120b3"></a><!-- doxytag: member="boost::gil::detail::nth_channel_deref_fn::_n" ref="da0e3adfe5f3db62623fb73a49c120b3" args="" -->
96 int
</td><td class=
"memItemRight" valign=
"bottom"><b>_n
</b></td></tr>
99 <hr>The documentation for this struct was generated from the following file:
<ul>
100 <li><a class=
"el" href=
"g_i_l_0226.html">image_view_factory.hpp
</a></ul>
102 <hr size=
"1"><address style=
"text-align: right;"><small>Generated on Sat May
2 13:
50:
18 2009 for Generic Image Library by
103 <a href=
"http://www.doxygen.org/index.html">
104 <img src=
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