// Get pixel color after applying effect to the specified input
public static SimpleColor[,] Blur(SimpleColor[,] arr, bool parallel)
{
int hgt = arr.GetLength(0), wid = arr.GetLength(1);
var res = new SimpleColor[hgt, wid];
// The outer for loop can be parallelized, depending on the argument
RunForLoop(parallel, 0, hgt, y => {
// Leave inner loop sequential
for (int x = 0; x < wid; x++) {
// Sum colors close to the specified location
var sum = SimpleColor.Zero;
for (int dy = -2; dy <= 2; dy++)
for (int dx = -2; dx <= 2; dx++)
sum += CheckedRead(arr, y + dy, x + dx, hgt, wid);
res[y, x] = sum / 25;
}
});
return res;
}
