private Int32 GetMatrixFactor()
{
Int32 result = 0;
for (Int32 y = 0; y < CachedMatrix.GetLength(0); y++)
{
for (Int32 x = 0; x < CachedMatrix.GetLength(1); x++)
{
Int32 value = CachedMatrix[y, x];
if (value > result)
{
result = value;
}
}
}
return(result);
}
/// <summary>
/// Called when ditherer is about to be prepared.
/// </summary>
protected virtual void OnPrepare()
{
// creates coeficient matrix and determines the matrix factor/divisor/maximum
CachedMatrix = CreateCoeficientMatrix();
Single maximum = GetMatrixFactor();
// prepares the cache arrays
Int32 width = CachedMatrix.GetLength(1);
Int32 height = CachedMatrix.GetLength(0);
CachedSummedMatrix = new Single[height, width];
// caches the matrix (and division by a sum)
for (Int32 y = 0; y < height; y++)
{
for (Int32 x = 0; x < width; x++)
{
CachedSummedMatrix[y, x] = CachedMatrix[y, x] / maximum;
}
}
}
