MEMORY-BASED STEP ITERATOR. More...
#include <step_iterator.hpp>
Public Types | |
using | parent_t = detail::step_iterator_adaptor< memory_based_step_iterator< Iterator >, Iterator, memunit_step_fn< Iterator > > |
using | reference = typename parent_t::reference |
using | difference_type = typename parent_t::difference_type |
using | x_iterator = Iterator |
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using | parent_t = iterator_adaptor< memory_based_step_iterator< Iterator >, Iterator, use_default, use_default, use_default, typename memunit_step_fn< Iterator > ::difference_type > |
using | base_difference_type = typename std::iterator_traits< Iterator >::difference_type |
using | difference_type = typename memunit_step_fn< Iterator > ::difference_type |
using | reference = typename std::iterator_traits< Iterator >::reference |
Public Member Functions | |
memory_based_step_iterator (Iterator it, std::ptrdiff_t memunit_step) | |
template<typename I2 > | |
memory_based_step_iterator (const memory_based_step_iterator< I2 > &it) | |
reference | operator[] (difference_type d) const |
void | set_step (std::ptrdiff_t memunit_step) |
x_iterator & | base () |
x_iterator const & | base () const |
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step_iterator_adaptor (const Iterator &it, memunit_step_fn< Iterator > step_fn=memunit_step_fn< Iterator >()) | |
difference_type | step () const |
Additional Inherited Members | |
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memunit_step_fn< Iterator > | _step_fn |
MEMORY-BASED STEP ITERATOR.
Iterator with dynamically specified step in memory units (bytes or bits). Models StepIteratorConcept, IteratorAdaptorConcept, MemoryBasedIteratorConcept, PixelIteratorConcept, HasDynamicXStepTypeConcept
A refinement of step_iterator_adaptor that uses a dynamic parameter for the step which is specified in memory units, such as bytes or bits
Pixel step iterators are used to provide iteration over non-adjacent pixels. Common use is a vertical traversal, where the step is the row stride.
Another application is as a sub-channel view. For example, a red intensity image over interleaved RGB data would use a step iterator adaptor with step sizeof(channel_t)*3 In the latter example the step size could be fixed at compile time for efficiency. Compile-time fixed step can be implemented by providing a step function object that takes the step as a template
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inline |
For some reason operator[] provided by iterator_adaptor returns a custom class that is convertible to reference We require our own reference because it is registered in iterator_traits