BaseLut< _FunctionT_, _OutputT_, _InputT_, _LutKeyT_ > Class Template Reference

#include <lut.h>

Public Member Functions
	BaseLut (_LutKeyT_ key, _FunctionT_ function=_FunctionT_())
_OutputT_	operator() (_InputT_ i) const
	~BaseLut ()

Private Member Functions
void	init ()

Private Attributes
_FunctionT_	m_function
_LutKeyT_	m_key
_OutputT_ *	m_table

Detailed Description

template<typename _FunctionT_, typename _OutputT_, typename _InputT_, typename _LutKeyT_>
class BaseLut< _FunctionT_, _OutputT_, _InputT_, _LutKeyT_ >

Provide an implementation for a look-up table for a function. Do not use directly, instead use Lut when you are not interested in having the full look-up table or for floating point, or use FullLut for 8bits and 16bits when you want to have a full Lut.

struct MyFunction {
 inline static int compute(int i)
 {
   return 1-i;
 }
}
Lut<MyFunction, int, int> myLut;

Definition at line 32 of file lut.h.

Constructor & Destructor Documentation

BaseLut()

template<typename _FunctionT_ , typename _OutputT_ , typename _InputT_ , typename _LutKeyT_ >

BaseLut< _FunctionT_, _OutputT_, _InputT_, _LutKeyT_ >::BaseLut ( _LutKeyT_ key, _FunctionT_ function = _FunctionT_() )

inline

Create the lut with the specific key.

Definition at line 50 of file lut.h.

                                                                        : m_key(key), m_function(function)
    {
      init();
    }

References BaseLut< _FunctionT_, _OutputT_, _InputT_, _LutKeyT_ >::init().

~BaseLut()

template<typename _FunctionT_ , typename _OutputT_ , typename _InputT_ , typename _LutKeyT_ >

BaseLut< _FunctionT_, _OutputT_, _InputT_, _LutKeyT_ >::~BaseLut ( )

inline

Definition at line 54 of file lut.h.

                      {
      // just leak on exit -- we get into trouble for explicitly
      // deleting stuff from static objects, like registries
      //delete[] m_table;
    }

Member Function Documentation

init()

template<typename _FunctionT_ , typename _OutputT_ , typename _InputT_ , typename _LutKeyT_ >

void BaseLut< _FunctionT_, _OutputT_, _InputT_, _LutKeyT_ >::init ( )

inlineprivate

Initialization of the table.

Definition at line 37 of file lut.h.

    {
      int size = m_key.size();
      m_table = new _OutputT_[size];
      for(int i = 0; i < size; ++i)
      {
        m_table[i] = m_function(m_key.keyToInput(i));
      }
    }

References BaseLut< _FunctionT_, _OutputT_, _InputT_, _LutKeyT_ >::m_function, BaseLut< _FunctionT_, _OutputT_, _InputT_, _LutKeyT_ >::m_key, and BaseLut< _FunctionT_, _OutputT_, _InputT_, _LutKeyT_ >::m_table.

operator()()

template<typename _FunctionT_ , typename _OutputT_ , typename _InputT_ , typename _LutKeyT_ >

_OutputT_ BaseLut< _FunctionT_, _OutputT_, _InputT_, _LutKeyT_ >::operator() ( _InputT_ i ) const

inline

Returns

the function value for parameter i

Definition at line 63 of file lut.h.

    {
      if(m_key.inrange(i))
      {
        return m_table[m_key.inputToKey(i)];
      }
      return m_function(i);
    }

References BaseLut< _FunctionT_, _OutputT_, _InputT_, _LutKeyT_ >::m_function, BaseLut< _FunctionT_, _OutputT_, _InputT_, _LutKeyT_ >::m_key, and BaseLut< _FunctionT_, _OutputT_, _InputT_, _LutKeyT_ >::m_table.

Member Data Documentation

m_function

template<typename _FunctionT_ , typename _OutputT_ , typename _InputT_ , typename _LutKeyT_ >

_FunctionT_ BaseLut< _FunctionT_, _OutputT_, _InputT_, _LutKeyT_ >::m_function

private

Definition at line 74 of file lut.h.

m_key

template<typename _FunctionT_ , typename _OutputT_ , typename _InputT_ , typename _LutKeyT_ >

_LutKeyT_ BaseLut< _FunctionT_, _OutputT_, _InputT_, _LutKeyT_ >::m_key

private

Definition at line 73 of file lut.h.

m_table

template<typename _FunctionT_ , typename _OutputT_ , typename _InputT_ , typename _LutKeyT_ >

_OutputT_* BaseLut< _FunctionT_, _OutputT_, _InputT_, _LutKeyT_ >::m_table

private

Definition at line 72 of file lut.h.

---

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

• libs/pigment/lut.h