////// WaterMark 的摘要说明 /// /// 图片加水印 /// 要加入的文字 /// 水印图片路径 /// 要加水印的图片路径 /// 处理后的图片路径 /// 水印在修改图片中距右边的宽度 /// 水印在修改图片中距底部的高度 /// 水印图片的透明度 /// 文字 /// 文字 /// 文字 /// 是否显示文字 /// 是否显示水印图片 public class WaterMark { #region param private string strCopyright, strMarkPath, strPhotoPath, strSavePath; private int iMarkRightSpace, iMarkButtomSpace, iDiaphaneity; private int iFontRightSpace = 0, iFontButtomSpace = 0, iFontDiaphaneity = 80; private int iFontSize = 10; private bool bShowCopyright = true, bShowMarkImage = true; #endregion #region WaterMark public WaterMark() { this.strCopyright = ""; this.strMarkPath = null; this.strPhotoPath = null; this.strSavePath = null; this.iDiaphaneity = 70; this.iMarkRightSpace = 0; this.iMarkButtomSpace = 0; } ////// 主要用两样都加的 /// public WaterMark(string copyright, string markPath, string photoPath, string savePath) { this.strCopyright = copyright; this.strMarkPath = markPath; this.strPhotoPath = photoPath; this.strSavePath = savePath; this.iDiaphaneity = 70; this.iMarkRightSpace = 0; this.iMarkButtomSpace = 0; } #endregion #region property ////// 设置是否显示水印文字 /// public bool ShowCopyright { set { this.bShowCopyright = value; } } ////// 设置是否显示水印图片 /// public bool ShowMarkImage { set { this.bShowMarkImage = value; } } ////// 获取或设置要加入的文字 /// public string Copyright { set { this.strCopyright = value; } } ////// 获取或设置加水印后的图片路径 /// public string SavePath { get { return this.strSavePath; } set { this.strSavePath = value; } } ////// 获取或设置水印图片路径 /// public string MarkPath { get { return this.strMarkPath; } set { this.strMarkPath = value; } } ////// 获取或设置要加水印图片的路径 /// public string PhotoPath { get { return this.strPhotoPath; } set { this.strPhotoPath = value; } } ////// 设置水印图片的透明度 /// public int Diaphaneity { set { if (value > 0 && value <= 100) this.iDiaphaneity = value; } } ////// 设置水印字体的透明度0-255 /// public int FontDiaphaneity { set { if (value >= 0 && value <= 255) this.iFontDiaphaneity = value; } } ////// 设置水印图片在修改图片中距左边的高度 /// public int MarkRightSpace { set { this.iMarkRightSpace = value; } } ////// 设置水印图片在修改图片中距底部的高度 /// public int MarkButtomSpace { set { this.iMarkButtomSpace = value; } } ////// 设置水印字体在修改图片中距左边的距离 /// public int FontRightSpace { set { iFontRightSpace = value; } } ////// 设置水印字体在修改图片中距底部的高度 /// public int FontButtomSpace { set { iFontButtomSpace = value; } } #endregion ////// 生成水印图片 /// ///public void createMarkPhoto() { Bitmap bmWatermark = null; FileStream fileStream = new FileStream(this.strPhotoPath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite); Image gPhoto = Image.FromStream(fileStream); int PhotoWidth = gPhoto.Width; int PhotoHeight = gPhoto.Height; //Bitmap bitPhoto = new Bitmap(PhotoWidth, PhotoHeight, PixelFormat.Format24bppRgb); Bitmap bitPhoto = new Bitmap(PhotoWidth, PhotoHeight); bitPhoto.SetResolution(gPhoto.HorizontalResolution, gPhoto.VerticalResolution); try { if (bShowCopyright) { Graphics grPhoto = Graphics.FromImage(bitPhoto); //grPhoto.SmoothingMode = SmoothingMode.AntiAlias;//这句代码的作用是让合成模式为自动反锯齿,也就是所谓的"模糊" grPhoto.DrawImage(gPhoto, new Rectangle(0, 0, PhotoWidth, PhotoHeight), 0, 0, PhotoWidth, PhotoHeight, GraphicsUnit.Pixel); Font crFont = new Font("楷体", iFontSize, FontStyle.Bold); SizeF crSize = grPhoto.MeasureString(strCopyright, crFont); //设置字体在图片中的位置 float yPosFromBottom = PhotoHeight - iFontButtomSpace - (crSize.Height); //float xCenterOfImg = (phWidth/2); float xCenterOfImg = PhotoWidth - iFontRightSpace - (crSize.Width / 2); //设置字体居中 StringFormat StrFormat = new StringFormat(); StrFormat.Alignment = StringAlignment.Center; //设置绘制文本的颜色和纹理 (Alpha=153) SolidBrush semiTransBrush2 = new SolidBrush(Color.FromArgb(this.iFontDiaphaneity, 0, 0, 0)); //将版权信息绘制到图象上 grPhoto.DrawString(strCopyright, crFont, semiTransBrush2, new PointF(xCenterOfImg, yPosFromBottom), StrFormat); gPhoto = bitPhoto; grPhoto.Dispose(); } if (bShowMarkImage) { //创建一个需要填充水银的Image对象 Image imgWatermark = new Bitmap(strMarkPath); int iMarkWidth = imgWatermark.Width; int iMarkmHeight = imgWatermark.Height; Graphics grWatermark = null; if (bShowCopyright) { //在原来修改过的bmPhoto上创建一个水银位图 bmWatermark = new Bitmap(bitPhoto); bmWatermark.SetResolution(gPhoto.HorizontalResolution, gPhoto.VerticalResolution); } else { bmWatermark = new Bitmap(gPhoto); } //将位图bmWatermark加载到Graphics对象 grWatermark = Graphics.FromImage(bmWatermark); 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, (float)iDiaphaneity/100f, 0.0f}, new float[] { 0.0f, 0.0f, 0.0f, 0.0f, 1.0f}}; ColorMatrix wmColorMatrix = new ColorMatrix(colorMatrixElements); imageAttributes.SetColorMatrix(wmColorMatrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap); grWatermark.DrawImage(imgWatermark, new Rectangle((PhotoWidth - iMarkRightSpace - (iMarkWidth / 2)), (PhotoHeight - iMarkButtomSpace - (iMarkmHeight / 2)), iMarkWidth, iMarkmHeight), 0, 0, iMarkWidth, iMarkmHeight, GraphicsUnit.Pixel, imageAttributes); gPhoto = bmWatermark; grWatermark.Dispose(); imgWatermark.Dispose(); } //设置输出图片质量，默认输出是60%的清晰度 EncoderParameter ep = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, 100L); EncoderParameters eps = new EncoderParameters(1); eps.Param[0] = ep; ImageCodecInfo ic = GetCodecInfo("image/jpeg"); fileStream.Close(); gPhoto.Save(strSavePath, ic, eps); bmWatermark.Dispose(); bitPhoto.Dispose(); gPhoto.Dispose(); ep.Dispose(); eps.Dispose(); } finally { if (bitPhoto != null) bitPhoto.Dispose(); if (bmWatermark != null) bmWatermark.Dispose(); fileStream.Close(); gPhoto.Dispose(); } } private ImageCodecInfo GetCodecInfo(String mimeType) { ImageCodecInfo[] CodecInfo = ImageCodecInfo.GetImageEncoders(); foreach (ImageCodecInfo ici in CodecInfo) { if (ici.MimeType == mimeType) return ici; } return null; } }