1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
using Windows.Graphics.Imaging;
using Windows.UI;
using Windows.UI.Xaml.Media.Imaging;
namespace File360
{
class ColorSampler
{
public Color GetPixel(WriteableBitmap wb)
{
int pixel; //ARGB variable with 32 int bytes where
//sets of 8 bytes are: Alpha, Red, Green, Blue
byte r = 0;
byte g = 0;
byte b = 0;
int i = 0;
int j = 0;
//Skip every alternate pixel making the program 4 times faster
for (i = 0; i < wb.PixelWidth; i = i + 2)
{
for (j = 0; j < wb.PixelHeight; j = j + 2)
{
pixel = WriteableBitmapExtensions.GetPixeli(wb,i,j); //the ARGB integer(pixel) has the colors of pixel (i,j)
r = (byte)(r + (255 & (pixel >> 16))); //add up reds
g = (byte)(g + (255 & (pixel >> 8))); //add up greens
b = (byte)(b + (255 & (pixel))); //add up blues
}
}
r = (byte)(r / (wb.PixelWidth/2 * wb.PixelHeight/2));
g = (byte)(g / (wb.PixelWidth / 2 * wb.PixelHeight / 2));
b = (byte)(b / (wb.PixelWidth / 2 * wb.PixelHeight / 2));
return Color.FromArgb(100, r, g, b);
}
}
}