Data commit

Task/Greyscale-bars-Display/C-sharp/greyscale-bars-display.cs

@@ -0,0 +1,33 @@
+using System;
+using System.Drawing;
+using System.Windows.Forms;
+static class Program { static void Main() { Application.Run(new FullScreen()); } }
+public sealed class FullScreen : Form
+{
+    const int ColorCount = 256;
+    public FullScreen()
+    {
+        FormBorderStyle = FormBorderStyle.None;
+        WindowState = FormWindowState.Maximized;
+        KeyPress += (s, e) => Application.Exit();
+        BackgroundImage = ColorBars(Screen.FromControl(this).Bounds);
+    }
+    private static Bitmap ColorBars(Rectangle size)
+    {
+        var colorBars = new Bitmap(size.Width, size.Height);
+        Func<int, int, int> forwardColor = (x, divs) => (int)(x * ((float)divs / size.Width)) * ColorCount / divs;
+        Func<int, int, int> reverseColor = (x, divs) => ColorCount - 1 - forwardColor(x, divs);
+        Action<int, int, int> setGray = (x, y, gray) => colorBars.SetPixel(x, y, Color.FromArgb(gray, gray, gray));
+        Action<int, int, int> setForward = (x, y, divs) => setGray(x, y, forwardColor(x, divs));
+        Action<int, int, int> setReverse = (x, y, divs) => setGray(x, y, reverseColor(x, divs));
+        int verticalStripe = size.Height / 4;
+        for (int x = 0; x < size.Width; x++)
+        {
+            for (int y = 0; y < verticalStripe; y++) setForward(x, y, 8);
+            for (int y = verticalStripe; y < verticalStripe * 2; y++) setReverse(x, y, 16);
+            for (int y = verticalStripe * 2; y < verticalStripe * 3; y++) setForward(x, y, 32);
+            for (int y = verticalStripe * 3; y < verticalStripe * 4; y++) setReverse(x, y, 64);
+        }
+        return colorBars;
+    }
+}