private static WaterPosition GetWaterPosition(float width, float height, float waterMarkWidth, float waterMarkHeight, WaterPositionOptions position)
{
WaterPosition position2 = new WaterPosition();
switch (position)
{
case WaterPositionOptions.LeftTop:
position2.X = 0f;
position2.Y = 0f;
break;
case WaterPositionOptions.RightTop:
position2.X = width - waterMarkWidth;
position2.Y = 0f;
break;
case WaterPositionOptions.Middle:
position2.X = ((float)(width - waterMarkWidth)) / 2f;
position2.Y = ((float)(height - waterMarkHeight)) / 2f;
break;
case WaterPositionOptions.LeftBottom:
position2.X = 0f;
position2.Y = height - waterMarkHeight;
break;
case WaterPositionOptions.RightBottom:
position2.X = width - waterMarkWidth;
position2.Y = height - waterMarkHeight;
break;
}
return(position2);
}
private static void SaveWaterPic(string sUploadPathAndFileName, WaterPositionOptions position)
{
sUploadPathAndFileName = HttpContext.Current.Server.MapPath(sUploadPathAndFileName);
Image image = Image.FromFile(sUploadPathAndFileName);
Bitmap bitmap = new Bitmap(image.Width, image.Height);
Graphics g = Graphics.FromImage(bitmap);
g.DrawImage(image, new Point(0, 0));
Image waterImage = GetWaterMarkImage();
WaterPosition waterPosition = GetWaterPosition(image.Width, image.Height, waterImage.Width, waterImage.Height, position);
//打水印
g.DrawImage(waterImage, new Rectangle((int)waterPosition.X, (int)waterPosition.Y, waterImage.Width, waterImage.Height), 0, 0, waterImage.Width, waterImage.Height, System.Drawing.GraphicsUnit.Pixel);
image.Dispose();
waterImage.Dispose();
bitmap.Save(sUploadPathAndFileName);
bitmap.Dispose();
g.Dispose();
}