private void boxBlurH_4(int[] source, int[] dest, int w, int h, int r)
{
//float iar = 1.0F / (r + r + 1);
IntegerDivider divider = IntegerDivider.GetDivider(r + r + 1);
Parallel.For(0, h, _pOptions, i =>
{
var ti = i * w;
var li = ti;
var ri = ti;
var fv = source[ti];
var lv = source[ti + w - 1];
var val = (r + 1) * fv;
for (var j = 0; j < r; j++)
{
val += source[ri++];
}
for (var j = 0; j <= r; j++)
{
val += source[ri++] - fv;
dest[ti++] = divider.Divide(val);
}
for (var j = r + 1; j < w - r; j++)
{
val += source[ri++] - dest[li++];
dest[ti++] = divider.Divide(val);
}
for (var j = w - r; j < w; j++)
{
val += lv - source[li++];
dest[ti++] = divider.Divide(val);
}
});
}
private void boxBlurT_4(int[] source, int[] dest, int w, int h, int r)
{
//float iar = 1.0F / (r + r + 1);
IntegerDivider divider = IntegerDivider.GetDivider(r + r + 1);
Parallel.For(0, w, _pOptions, i =>
{
var ti = i;
var li = ti;
var ri = ti;
var fv = source[ti];
var lv = source[ti + w * (h - 1)];
var val = (r + 1) * fv;;
for (int j = 0; j < r; j++)
{
val += source[ri];
ri += w;
}
for (var j = 0; j <= r; j++)
{
val += source[ri] - fv;
dest[ti] = divider.Divide(val);
ri += w;
ti += w;
}
for (var j = r + 1; j < h - r; j++)
{
val += source[ri] - source[li];
dest[ti] = divider.Divide(val);
li += w;
ri += w;
ti += w;
}
for (var j = h - r; j < h; j++)
{
val += lv - source[li];
dest[ti] = divider.Divide(val);
li += w;
ti += w;
}
});
}