Scale Bitmap By Percent

   
 

//Octavalent Extension Methods
//http://sdfasdf.codeplex.com/
//Library of extension methods for .Net create by Octavalent (www.octavalent.nl)


#region

using System.Drawing.Drawing2D;
using System.Drawing.Imaging;

#endregion

namespace System.Drawing.OctavalentExtensions
{
    public static class BitmapExtensions
    {
        public static Bitmap ScaleByPercent(this Bitmap imgPhoto, int Percent)
        {
            float nPercent = ((float) Percent/100);

            int sourceWidth = imgPhoto.Width;
            int sourceHeight = imgPhoto.Height;
            var destWidth = (int) (sourceWidth*nPercent);
            var destHeight = (int) (sourceHeight*nPercent);

            var bmPhoto = new Bitmap(destWidth, destHeight,
                                     PixelFormat.Format24bppRgb);
            bmPhoto.SetResolution(imgPhoto.HorizontalResolution,
                                  imgPhoto.VerticalResolution);

            Graphics grPhoto = Graphics.FromImage(bmPhoto);
            grPhoto.InterpolationMode = InterpolationMode.HighQualityBicubic;

            grPhoto.DrawImage(imgPhoto,
                              new Rectangle(0, 0, destWidth, destHeight),
                              new Rectangle(0, 0, sourceWidth, sourceHeight),
                              GraphicsUnit.Pixel);

            grPhoto.Dispose();
            return bmPhoto;
        }
    }
}