Fast Image Rotation For .NET Compact Framework

using System;
using System.ComponentModel;
using System.Drawing;
using System.Windows.Forms;

namespace Bornander.UI.Imaging.Test
{
    public partial class ImagePanel : Panel
    {
        public ImagePanel()
        {
            InitializeComponent();
        }

        private void LayoutPictureBox()
        {
            SuspendLayout();
            if (pictureBox.Image != null)
            {
                Image image = pictureBox.Image;
                float aspectRatio = (float)image.Width / (float)image.Height;

                int wa = this.Width;
                int ha = (int)(wa / aspectRatio);
                if (ha > this.Height)
                {
                    pictureBox.Size = new Size(
                        (int)(this.Height * aspectRatio), 
                        this.Height);
                }
                else
                {
                    pictureBox.Size = new Size(wa, ha);
                }

                pictureBox.Location = new Point(
                    (this.Width - pictureBox.Width) / 2,
                    (this.Height - pictureBox.Height) / 2);

                pictureBox.Visible = true;
            }
            else
            {
                pictureBox.Visible = false;
            }
            ResumeLayout();
        }

        protected override void OnResize(EventArgs eventargs)
        {
            base.OnResize(eventargs);
            LayoutPictureBox();
        }

        public Image Image
        {
            get { return pictureBox.Image; }
            set 
            { 
                pictureBox.Image = value;
                LayoutPictureBox();
            }
        }
    }
}