public static void WaterMark(Image image, Image watermarkImage, Point offset, ContentAlignment imagePosition)
{
using (Graphics newGp = Graphics.FromImage(image))
{
newGp.CompositingQuality = CompositingQuality.HighQuality;
//设置高质量插值法
newGp.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
//设置高质量,低速度呈现平滑程度
newGp.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
Rectangle rect = new Rectangle(0, 0, image.Width, image.Height);
Rectangle newRect = rect.Resize(offset, new Size(watermarkImage.Width, watermarkImage.Height), imagePosition);
newGp.DrawImage(watermarkImage, newRect);
}
}
