需要将图像更改为更透明. [英] need to change the image to more transparent.
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问题描述
我的水印需要降低透明度.我应该怎么做下面的代码:
任何帮助都会很棒.
I have a watermark that needs to be less transparent. What should I do the below code:
Any help would be great.
// Thumbnail-size image
Byte[] byteBLOBData = new Byte[0];
byteBLOBData = (byte[])dReader["p_Image"];
ImageExtension = dReader["p_Type"].ToString();
MemoryStream stmBLOBData = new MemoryStream(byteBLOBData);
stmBLOBData.Write(byteBLOBData, 0, byteBLOBData.Length);
System.Drawing.Image returnImage = System.Drawing.Image.FromStream(stmBLOBData, false, false);
System.Drawing.Image cropImage = ImageHandler.ImageCrop(returnImage, 100, 160, ImageHandler.AnchorPosition.Bottom);
//define a string of text to use as the Copyright message
//string Copyright = "Copyright © 2011 - OmegaLove.com";
//add fading to logo image using TextureBrush
System.Drawing.Image waterMarkimage = System.Drawing.Image.FromFile (
(System.Web.HttpContext.Current.Server.MapPath("~/Images/Watermark/watermark.jpg")));
Color color = System.Drawing.Color.FromArgb(50, 0, 0, 0);
Graphics opacity = System.Drawing.Graphics.FromImage(waterMarkimage);
Rectangle imageRect = new Rectangle(0, 0, waterMarkimage.Width, waterMarkimage.Height);
Brush brush = new TextureBrush(waterMarkimage, imageRect);
opacity.FillRectangle(brush, imageRect);
opacity.Save();
Graphics g = System.Drawing.Graphics.FromImage(cropImage);
Point point = new Point(cropImage.Width / 3, cropImage.Height / 2);
g.DrawImage(waterMarkimage, point);
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