using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Facade
{
	class Client
	{
		public static void HowToUse()
		{
			GC.Collect();

			byte[] data = Facade.PrintPicture(102802);

			Form form = new Form();
			form.BackgroundImageLayout = ImageLayout.Stretch;
			form.BackgroundImage = GenerateBitmapImage(data);
			form.ShowDialog();
		}

		private static Bitmap GenerateBitmapImage(byte[] data)
		{
			int size = (int)Math.Sqrt(data.Length);

			Bitmap bitmap = new Bitmap(size, size, PixelFormat.Format8bppIndexed);
			BitmapData bitmapData = bitmap.LockBits(new Rectangle(0, 0, bitmap.Width, bitmap.Height), ImageLockMode.WriteOnly, bitmap.PixelFormat);

			try
			{
				for (int rowIdx = 0; rowIdx < bitmapData.Height; ++rowIdx)
				{
					Marshal.Copy(data, rowIdx * bitmap.Width, bitmapData.Scan0 + rowIdx * bitmapData.Stride, bitmap.Width);
				}
			}
			finally
			{
				bitmap.UnlockBits(bitmapData);
			}

			return bitmap;
		}
	}
}