public Color GetPixel(Int32 x, Int32 y)
{
return(m_bmpImage.GetPixel(x, y));
}
public void Blur(Int32 nHorz, Int32 nVert)
{
Single nWeightSum;
Single[] nWeights;
FastBitmap bmpBlur = (FastBitmap)m_bmpImage.Clone();
m_bmpImage.Lock();
bmpBlur.Lock();
// horizontal blur
nWeights = new Single[nHorz * 2 + 1];
for (Int32 i = 0; i < nHorz * 2 + 1; i++)
{
Single y = Gauss(-nHorz + i, 0, nHorz);
nWeights[i] = y;
}
for (Int32 row = 0; row < m_bmpImage.Height; row++)
{
for (Int32 col = 0; col < m_bmpImage.Width; col++)
{
Double r = 0;
Double g = 0;
Double b = 0;
nWeightSum = 0;
for (Int32 i = 0; i < nHorz * 2 + 1; i++)
{
Int32 x = col - nHorz + i;
if (x < 0)
{
i += -x;
x = 0;
}
if (x > m_bmpImage.Width - 1)
{
break;
}
Color c = m_bmpImage.GetPixel(x, row);
r += c.R * nWeights[i];
g += c.G * nWeights[i];
b += c.B * nWeights[i];
nWeightSum += nWeights[i];
}
r /= nWeightSum;
g /= nWeightSum;
b /= nWeightSum;
Byte br = (Byte)Math.Round(r);
Byte bg = (Byte)Math.Round(g);
Byte bb = (Byte)Math.Round(b);
if (br > 255)
{
br = 255;
}
if (bg > 255)
{
bg = 255;
}
if (bb > 255)
{
bb = 255;
}
bmpBlur.SetPixel(col, row, Color.FromArgb(br, bg, bb));
}
}
// vertical blur
nWeights = new Single[nVert * 2 + 1];
for (Int32 i = 0; i < nVert * 2 + 1; i++)
{
Single y = Gauss(-nVert + i, 0, nVert);
nWeights[i] = y;
}
for (Int32 col = 0; col < m_bmpImage.Width; col++)
{
for (Int32 row = 0; row < m_bmpImage.Height; row++)
{
Double r = 0;
Double g = 0;
Double b = 0;
nWeightSum = 0;
for (Int32 i = 0; i < nVert * 2 + 1; i++)
{
Int32 y = row - nVert + i;
if (y < 0)
{
i += -y;
y = 0;
}
if (y > m_bmpImage.Height - 1)
{
break;
}
Color c = bmpBlur.GetPixel(col, y);
r += c.R * nWeights[i];
g += c.G * nWeights[i];
b += c.B * nWeights[i];
nWeightSum += nWeights[i];
}
r /= nWeightSum;
g /= nWeightSum;
b /= nWeightSum;
Byte br = (Byte)Math.Round(r);
Byte bg = (Byte)Math.Round(g);
Byte bb = (Byte)Math.Round(b);
if (br > 255)
{
br = 255;
}
if (bg > 255)
{
bg = 255;
}
if (bb > 255)
{
bb = 255;
}
m_bmpImage.SetPixel(col, row, Color.FromArgb(br, bg, bb));
}
}
bmpBlur.Dispose(); // will unlock
m_bmpImage.Unlock();
}
