/**
* Merges colors represented as 32-bit integers with an array of bits
* from a given file.
*/
private static int[] Merge(BitArray bits, Tour tour, int[] pixels)
{
//Clone pixels to prevent destruction.
var newPixels = (int[]) pixels.Clone();
Benchmark mark = new Benchmark("Time to Generate Tour", true);
Square start = tour.CreateTour();
Square current = start;
mark.Time();
mark = new Benchmark("Time to Modify Pixel Channels", true);
for (int n = 0, length = bits.Length; n < length; n += 3)
{
//Calculate the bit depth to use.
int depth = n/newPixels.Length;
//Select the pixel to operate on and get the color channels.
int index = Util.ToIndex(tour.Width, current.X, current.Y);
int pixel = newPixels[index];
//Get channel values and create a bool representation.
int r = (pixel >> 16) & 0xFF;
int g = (pixel >> 8) & 0xFF;
int b = pixel & 0xFF;
bool red = bits[n];
bool green = n + 1 < length && bits[n + 1];
bool blue = n + 2 < length && bits[n + 2];
//Set pixel channel values based on the above bools.
if (red) r = r | 1 << depth;
else r = r & ~(1 << depth);
if (green) g = g | 1 << depth;
else g = g & ~(1 << depth);
if (blue) b = b | 1 << depth;
else b = b & ~(1 << depth);
newPixels[index] = Util.BitsToColor(r, g, b);
//Select the next pixel to manipulate.
current = current.Next ?? start;
}
mark.Time();
return newPixels;
}
