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StandardValueAccessor Class Template Reference | ![]() |
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Encapsulate access to the values an iterator points to. More...
#include "vigra/accessor.hxx"
Public Types | |
typedef VALUETYPE | value_type |
Public Methods | |
template<class ITERATOR> VALUETYPE | operator() (ITERATOR const &i) const |
template<class ITERATOR, class DIFFERENCE> VALUETYPE | operator() (ITERATOR const &i, DIFFERENCE const &diff) const |
template<class V, class ITERATOR> void | set (V value, ITERATOR const &i) const |
template<class V, class ITERATOR, class DIFFERENCE> void | set (V value, ITERATOR const &i, DIFFERENCE const &diff) const |
Detailed Description |
StandardValueAccessor is a trivial accessor that simply encapsulates the iterator's operator *() and operator[]() in its read and write functions. It passes its arguments by value. If the iterator returns its items by reference (such as vigra::ImageIterator), you can also use StandardAccessor. These accessors have different optimization properties -- StandardAccessor is usually faster for compound pixel types, while StandardValueAccessor is faster for the built-in types.
When a floating point number is assigned by means of an accessor with integral value_type, the value is rounded and clipped as approriate.
#include "vigra/accessor.hxx"
Namespace: vigra
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the value_type |
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Read the data item at an offset (can be 1D or 2D or higher order difference). The type |
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Read the current data item. The type |
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Write the data item at an offset (can be 1D or 2D or higher order difference).. The type |
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Write the current data item. The type |
© Ullrich Köthe (koethe@informatik.uni-hamburg.de) |
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