Greyscale bars/Display: Difference between revisions

=={{header|C sharp|C#}}==

{{libheader|System.Windows.Forms}}

<lang csharp>using System;

using System.Drawing;

using System.Windows.Forms;

static class Program

{

static void Main()

{

Application.Run(new FullScreen());

}

}

public sealed class FullScreen : Form

{

public FullScreen()

{

FormBorderStyle = FormBorderStyle.None;

WindowState = FormWindowState.Maximized;

KeyPress += (s, e) => Application.Exit();

BackgroundImage = ColorBars(Screen.FromControl(this).Bounds);

}

private static Bitmap ColorBars(Rectangle screen)

{

int width = screen.Width, height = screen.Height;

var colorBars = new Bitmap(width, height);

var colorLimit = 256;

int stripeHeight = height/4;

for (int x = 0; x < width; x++)

{

int divisions = 8;

Func<int> forwardColor = () => x/(width/divisions)*(colorLimit/divisions);

Func<int> reverseColor = () => colorLimit - 1 - forwardColor();

Action<int> setForward = y => colorBars.SetPixel(x, y, Color.FromArgb(forwardColor(), forwardColor(), forwardColor()));

Action<int> setReverse = y => colorBars.SetPixel(x, y, Color.FromArgb(reverseColor(), reverseColor(), reverseColor()));

for (int y = 0; y < stripeHeight; y++) setForward(y);

divisions = 16;

for (int y = stripeHeight; y < stripeHeight*2; y++) setReverse(y);

divisions = 32;

for (int y = stripeHeight*2; y < stripeHeight*3; y++) setForward(y);

divisions = 64;

for (int y = stripeHeight*3; y < stripeHeight*4; y++) setReverse(y);

}

return colorBars;

}

}</lang>