internal override void Process(PixelBuffer target)
{
if (target.width != temporaryBuffer.width || target.height != temporaryBuffer.height)
{
return;
}
if (!ShowEdges)
{
temporaryBuffer.Copy(target);
Parallel.For(1, target.height, (i) =>
{
for (int j = 1; j < target.width; j++)
{
int cur = target.width * i + j;
int up = target.width * (i - 1) + j;
int left = target.width * i + j - 1;
int differenceV = dist(
target.uint0[cur],
target.uint0[up]);
int differenceH = dist(
target.uint0[cur],
target.uint0[left]);
if (differenceV >= sqrThreshold)
{
temporaryBuffer.uint0[target.width * i + j] = avg(target.uint0[up], target.uint0[cur]);
}
else if (differenceH >= sqrThreshold)
{
temporaryBuffer.uint0[target.width * i + j] = avg(target.uint0[left], target.uint0[cur]);
}
}
});
}
else
{
Parallel.For(1, target.height, (i) =>
{
for (int j = 1; j < target.width; j++)
{
int cur = target.width * i + j;
int up = target.width * (i - 1) + j;
int left = target.width * i + j - 1;
int differenceV = dist(
target.uint0[cur],
target.uint0[up]);
int differenceH = dist(
target.uint0[cur],
target.uint0[left]);
if (differenceV >= sqrThreshold)
{
temporaryBuffer.uint0[target.width * i + j] = 0xff0000;
}
else if (differenceH >= sqrThreshold)
{
temporaryBuffer.uint0[target.width * i + j] = 0x0000ff;
}
else
{
temporaryBuffer.uint0[target.width * i + j] = 0;
}
}
});
}
target.Copy(temporaryBuffer);
return;
int dist(uint pixel1, uint pixel2)
{
int sum = 0;
int tmp;
tmp = (byte)pixel1 - (byte)pixel2;
tmp *= tmp;
sum += tmp;
pixel1 >>= 8;
pixel2 >>= 8;
tmp = (byte)pixel1 - (byte)pixel2;
tmp *= tmp;
sum += tmp;
pixel1 >>= 8;
pixel2 >>= 8;
tmp = (byte)pixel1 - (byte)pixel2;
tmp *= tmp;
sum += tmp;
return(sum);
}
uint avg(uint pixel1, uint pixel2)
{
// B
uint result = ((pixel1 & 0xffu) + (pixel2 & 0xffu)) / 2u;
// G
result |= ((pixel1 & 0xff00u) + (pixel2 & 0xff00u)) / 2u & 0xff00u;
// R
result |= ((pixel1 & 0xff0000u) + (pixel2 & 0xff0000u)) / 2u & 0xff0000u;
return(result);
}
}
