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using System;
using System.IO; using System.Collections; using System.Drawing; using System.Drawing.Drawing2D; using System.Drawing.Imaging; namespace BLL { /**//// <summary> /// 水印的类型 /// </summary> public enum WaterMarkType { /**//// <summary> /// 文字水印 /// </summary> TextMark, /**//// <summary> /// 图片水印 /// </summary> //ImageMark // 暂时只能添加文字水印 }; /**//// <summary> /// 水印的位置 /// </summary> public enum WaterMarkPosition { /**//// <summary> /// 左上角 /// </summary> WMP_Left_Top, /**//// <summary> /// 左下角 /// </summary> WMP_Left_Bottom, /**//// <summary> /// 右上角 /// </summary> WMP_Right_Top, /**//// <summary> /// 右下角 /// </summary> WMP_Right_Bottom }; /**//// <summary> /// 处理图片的类（包括加水印，生成缩略图） /// </summary> public class ImageWaterMark { public ImageWaterMark() { // // TODO: 在此处添加构造函数逻辑 // } 给图片加水印#region 给图片加水印 /**//// <summary> /// 添加水印(分图片水印与文字水印两种) /// </summary> /// <param name="oldpath">原图片绝对地址</param> /// <param name="newpath">新图片放置的绝对地址</param> /// <param name="wmtType">要添加的水印的类型</param> /// <param name="sWaterMarkContent">水印内容，若添加文字水印，此即为要添加的文字； /// 若要添加图片水印，此为图片的路径</param> public void addWaterMark(string oldpath, string newpath, WaterMarkType wmtType, string sWaterMarkContent) { try { Image image = Image.FromFile(oldpath); Bitmap b = new Bitmap(image.Width, image.Height, PixelFormat.Format24bppRgb); Graphics g = Graphics.FromImage(b); g.Clear(Color.White); g.SmoothingMode = SmoothingMode.HighQuality; g.InterpolationMode = InterpolationMode.High; g.DrawImage(image, 0, 0, image.Width, image.Height); switch (wmtType) { /**//*case WaterMarkType.ImageMark: //图片水印 this.addWatermarkImage(g, Page.Server.MapPath(Watermarkimgpath), WatermarkPosition,image.Width,image.Height); break;*/ case WaterMarkType.TextMark: //文字水印 this.addWatermarkText(g, sWaterMarkContent, "WM_BOTTOM_RIGHT", image.Width, image.Height); break; } b.Save(newpath); b.Dispose(); image.Dispose(); } catch { if(File.Exists(oldpath)) { File.Delete(oldpath); } } finally { if(File.Exists(oldpath)) { File.Delete(oldpath); } } } /**//// <summary> /// 加水印文字 /// </summary> /// <param name="picture">imge 对象</param> /// <param name="_watermarkText">水印文字内容</param> /// <param name="_watermarkPosition">水印位置</param> /// <param name="_width">被加水印图片的宽</param> /// <param name="_height">被加水印图片的高</param> private void addWatermarkText(Graphics picture, string _watermarkText, string _watermarkPosition, int _width, int _height) { // 确定水印文字的字体大小 int[] sizes = new int[]{32, 30, 28, 26, 24, 22, 20, 18, 16, 14, 12, 10, 8, 6, 4}; Font crFont = null; SizeF crSize = new SizeF(); for (int i = 0;i < sizes.Length; i++) { crFont = new Font("Arial Black", sizes[i], FontStyle.Bold); crSize = picture.MeasureString(_watermarkText, crFont); if((ushort)crSize.Width < (ushort)_width) { break; } } // 生成水印图片（将文字写到图片中） Bitmap floatBmp = new Bitmap((int)crSize.Width + 3, (int)crSize.Height + 3, PixelFormat.Format32bppArgb); Graphics fg=Graphics.FromImage(floatBmp); PointF pt=new PointF(0,0); // 画阴影文字 Brush TransparentBrush0 = new SolidBrush(Color.FromArgb(255, Color.Black)); Brush TransparentBrush1 = new SolidBrush(Color.FromArgb(255, Color.Black)); fg.DrawString(_watermarkText,crFont,TransparentBrush0, pt.X, pt.Y + 1); fg.DrawString(_watermarkText,crFont,TransparentBrush0, pt.X + 1, pt.Y); fg.DrawString(_watermarkText,crFont,TransparentBrush1, pt.X + 1, pt.Y + 1); fg.DrawString(_watermarkText,crFont,TransparentBrush1, pt.X, pt.Y + 2); fg.DrawString(_watermarkText,crFont,TransparentBrush1, pt.X + 2, pt.Y); TransparentBrush0.Dispose(); TransparentBrush1.Dispose(); // 画文字 fg.SmoothingMode=System.Drawing.Drawing2D.SmoothingMode.HighQuality; fg.DrawString(_watermarkText, crFont, new SolidBrush(Color.White), pt.X, pt.Y, StringFormat.GenericDefault); // 保存刚才的操作 fg.Save(); fg.Dispose(); // floatBmp.Save("d:\\WebSite\\DIGITALKM\\ttt.jpg"); // 将水印图片加到原图中 this.addWatermarkImage( picture, new Bitmap(floatBmp), "WM_BOTTOM_RIGHT", _width, _height); } /**//// <summary> /// 加水印图片 /// </summary> /// <param name="picture">imge 对象</param> /// <param name="iTheImage">Image对象（以此图片为水印）</param> /// <param name="_watermarkPosition">水印位置</param> /// <param name="_width">被加水印图片的宽</param> /// <param name="_height">被加水印图片的高</param> private void addWatermarkImage( Graphics picture,Image iTheImage, string _watermarkPosition,int _width,int _height) { Image watermark = new Bitmap(iTheImage); ImageAttributes imageAttributes = new ImageAttributes(); ColorMap colorMap = new ColorMap(); colorMap.OldColor = Color.FromArgb(255, 0, 255, 0); colorMap.NewColor = Color.FromArgb(0, 0, 0, 0); ColorMap[] remapTable = {colorMap}; imageAttributes.SetRemapTable(remapTable, ColorAdjustType.Bitmap); float[][] colorMatrixElements = { new float[] {1.0f, 0.0f, 0.0f, 0.0f, 0.0f}, new float[] {0.0f, 1.0f, 0.0f, 0.0f, 0.0f}, new float[] {0.0f, 0.0f, 1.0f, 0.0f, 0.0f}, new float[] {0.0f, 0.0f, 0.0f, 0.3f, 0.0f}, new float[] {0.0f, 0.0f, 0.0f, 0.0f, 1.0f} }; ColorMatrix colorMatrix = new ColorMatrix(colorMatrixElements); imageAttributes.SetColorMatrix(colorMatrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap); int xpos = 0; int ypos = 0; int WatermarkWidth = 0; int WatermarkHeight = 0; double bl = 1d; //计算水印图片的比率 //取背景的1/4宽度来比较 if ((_width > watermark.Width * 4) && (_height > watermark.Height * 4)) { bl = 1; } else if ((_width > watermark.Width * 4) && (_height<watermark.Height * 4)) { bl = Convert.ToDouble(_height / 4) / Convert.ToDouble(watermark.Height); } else if ((_width < watermark.Width * 4) && (_height > watermark.Height * 4)) { bl = Convert.ToDouble(_width / 4) / Convert.ToDouble(watermark.Width); } else { if ((_width * watermark.Height) > (_height * watermark.Width)) { bl = Convert.ToDouble(_height / 4) / Convert.ToDouble(watermark.Height); } else { bl = Convert.ToDouble(_width / 4) / Convert.ToDouble(watermark.Width); } } WatermarkWidth = Convert.ToInt32(watermark.Width * bl); WatermarkHeight = Convert.ToInt32(watermark.Height * bl); switch (_watermarkPosition) { case "WM_TOP_LEFT": xpos = 10; ypos = 10; break; case "WM_TOP_RIGHT": xpos = _width - WatermarkWidth - 10; ypos = 10; break; case "WM_BOTTOM_RIGHT": xpos = _width - WatermarkWidth - 10; ypos = _height -WatermarkHeight - 10; break; case "WM_BOTTOM_LEFT": xpos = 10; ypos = _height - WatermarkHeight - 10; break; } picture.DrawImage( watermark, new Rectangle(xpos, ypos, WatermarkWidth, WatermarkHeight), 0, 0, watermark.Width, watermark.Height, GraphicsUnit.Pixel, imageAttributes); watermark.Dispose(); imageAttributes.Dispose(); } /**//// <summary> /// 加水印图片 /// </summary> /// <param name="picture">imge 对象</param> /// <param name="WaterMarkPicPath">水印图片的地址</param> /// <param name="_watermarkPosition">水印位置</param> /// <param name="_width">被加水印图片的宽</param> /// <param name="_height">被加水印图片的高</param> private void addWatermarkImage( Graphics picture,string WaterMarkPicPath, string _watermarkPosition,int _width,int _height) { Image watermark = new Bitmap(WaterMarkPicPath); this.addWatermarkImage(picture, watermark, _watermarkPosition, _width, _height); } #endregion 生成缩略图#region 生成缩略图 /**//// <summary> /// 保存图片 /// </summary> /// <param name="image">Image 对象</param> /// <param name="savePath">保存路径</param> /// <param name="ici">指定格式的编解码参数</param> private void SaveImage(Image image, string savePath, ImageCodecInfo ici) { //设置 原图片 对象的 EncoderParameters 对象 EncoderParameters parameters = new EncoderParameters(1); parameters.Param[0] = new EncoderParameter( System.Drawing.Imaging.Encoder.Quality, ((long) 90)); image.Save(savePath, ici, parameters); parameters.Dispose(); } /**//// <summary> /// 获取图像编码解码器的所有相关信息 /// </summary> 全部评论
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