protected override void ConvertBitmapData()
{
int scale = (int)Math.Pow(2, Power);
Image.Data.Width = Image.Data.Width * scale;
Image.Data.Height = Image.Data.Height * scale;
Image.Data.Data = new byte[Image.Data.GetRealSize()];
int[,] ditherMatrix = Dither.GenerateDitherMatrix(Power);
for (int i = 0; i < oldData.Width; i++)
{
for (int k = 0; k < oldData.Height; k++)
{
byte oldValue = oldData.Get8BitDataAt(i, k);
int threshold = (int)((double)oldValue / 255 * scale);
for (int m = 0; m < scale; m++)
{
for (int n = 0; n < scale; n++)
{
if (threshold >= ditherMatrix[m, n])
{
Image.Data.Set1BitDataAt(i * scale + m, k * scale + n, true);
}
else
{
Image.Data.Set1BitDataAt(i * scale + m, k * scale + n, false);
}
}
}
}
}
}
public void TestGenerateDitherMatrix()
{
var matrix = Dither.GenerateDitherMatrix(1);
Assert.Equal(new int[2, 2]
{
{ 0, 2 },
{ 3, 1 }
}, matrix);
matrix = Dither.GenerateDitherMatrix(2);
Assert.Equal(new int[4, 4]
{
{ 0, 8, 2, 10 },
{ 12, 4, 14, 6 },
{ 3, 11, 1, 9 },
{ 15, 7, 13, 5 }
}, matrix);
}
public OrderedDitherConverter(BmpImage data, int DitherMatrixPower) : base(data)
{
ditherMatrix = Dither.GenerateDitherMatrix(DitherMatrixPower);
ditherMatrixSize = (int)Math.Pow(2, DitherMatrixPower);
}
public OrderedDitherConverter(BmpImage data) : base(data)
{
ditherMatrix = Dither.GenerateDitherMatrix(1);
ditherMatrixSize = 2;
}
public void TestThrowsWhenArgumentInvalid()
{
Assert.Throws <ArgumentOutOfRangeException>(() => Dither.GenerateDitherMatrix(0));
}