/// <summary>
/// 设置水印
/// </summary>
/// <param name="original"></param>
/// <param name="watermark"></param>
/// <returns></returns>
public Image MakeWatermark(Image original, Watermark watermark)
{
//Bitmap b = new Bitmap(original.Width, original.Height, PixelFormat.Format24bppRgb);
//b.SetResolution(original.HorizontalResolution, original.VerticalResolution);
// 不加水印
if (watermark.Ratio < 0)
{
return(original);
}
//当ratio大于1时，加的部分水印会在图片外面(不显示)
Size markSize = new Size((int)Math.Round(watermark.Ratio * original.Width), (int)Math.Round(watermark.Ratio * original.Height));
watermark.SetSize(markSize);
switch (watermark.WatermarkType)
{
case WatermarkType.Text:
//添加文字水印
var textWm = watermark as TextWatermark;
if (!string.IsNullOrEmpty(textWm.Text))
{
textWm.HorizontalResolution = original.HorizontalResolution; // b.HorizontalResolution;
textWm.VerticalResolution = original.VerticalResolution; // b.VerticalResolution;
var textMark = this.CreateTextWatermark(textWm);
ImageWatermark imageWm = new ImageWatermark()
{
Alignment = textWm.Alignment,
Alpha = textWm.Alpha,
Image = textMark,
MarginPercentage = textWm.MarginPercentage,
Ratio = textWm.Ratio,
};
imageWm.SetSize(textWm.Size);
return(MakeImageWatermark(original, imageWm));
}
break;
case WatermarkType.Image:
return(MakeImageWatermark(original, watermark as ImageWatermark));
break;
default:
break;
}
return(original);
}
