public static void DrawImage(this IMapContext map, Image image, RectangleF destRect, RectangleF srcRect)
{
var gs = map.Graphics.Save();
map.Graphics.SmoothingMode = SmoothingMode.HighSpeed;
map.Graphics.InterpolationMode = InterpolationMode.NearestNeighbor;
map.Graphics.PixelOffsetMode = PixelOffsetMode.HighSpeed;
map.Graphics.CompositingQuality = CompositingQuality.HighSpeed;
map.Flip();
Rectangle destRect2 = new Rectangle((int)destRect.X, (int)destRect.Y, (int)destRect.Width, (int)destRect.Height);
map.Graphics.DrawImage(image, destRect2, (int)srcRect.X, (int)srcRect.Y, (int)srcRect.Width, (int)srcRect.Height, GraphicsUnit.Pixel, null);
map.Graphics.Restore(gs);
}
