BitCountLut Class Reference

Collaboration diagram for BitCountLut:

Public Member Functions
	BitCountLut ()
byte	lookup (byte index)

Private Attributes
byte	lut [256]

Constructor & Destructor Documentation

BitCountLut()

BitCountLut::BitCountLut

(

)

{
  for(int i = 0; i < 256; i++)
  {
    int sum = 0;
    for(int v = i; v; v >>= 1)
    {
      sum += v & 1;
    }
    lut[i] = sum;
  }
}

Member Function Documentation

lookup()

byte BitCountLut::lookup ( byte  index )

inline

{ return lut[index]; }

Referenced by Operations1bpp::reduce(), and Operations1bppClipped::reduce().

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Member Data Documentation

lut

byte BitCountLut::lut[256]

private

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

• libs/tiled-bitmap/src/layeroperations.cc