typename
View::pitch_type
subview_pitch(
View const &_view,
typename View::bound_type const &_bound
)
{
typedef typename View::pitch_type pitch_type;
pitch_type ret{
mizuiro::no_init{}
};
for(
typename pitch_type::size_type index = 0;
index < pitch_type::static_size;
++index
)
{
typename View::dim const edge_pos_end(
mizuiro::image::detail::edge_pos_end(
_bound,
index
)
);
ret[
index
] =
_view.size()[
index
] > 1
?
mizuiro::image::detail::pitch_difference(
mizuiro::image::move_iterator(
_view,
edge_pos_end
),
mizuiro::image::move_iterator(
_view,
mizuiro::image::detail::edge_pos_begin(
_bound,
index
)
)
)
:
0
;
// if the end is one past the parent view's dim,
// the pitch will be skipped by the iterator, so readd it
if(
edge_pos_end[
index
]
==
_view.size()[
index
]
)
ret[
index
]
+=
_view.pitch()[
index
];
}
return ret;
}
