/********************************* * * FileName:waterMark * Coypright: (c) 2007-1-27 开发部 * Writer:兴兴 * Create Date:2007-01-27 * Rewriter: * Rewriter Date: * Impact: * Main Content:图片加水印和版权 * *********************************/
using System.Drawing;using System.IO;using System.Drawing.Drawing2D;using System.Drawing.Imaging;
namespace ImageWaterMark{ /// <summary> /// WaterMark 的摘要说明 /// </summary> /// /// <param name="strCopyright">要加入的文字</param> /// <param name="strMarkPath">水印图片路径</param> /// <param name="strPhotoPath">要加水印的图片路径</param> /// <param name="strSavePath">处理后的图片路径</param> /// <param name="iMarkRightSpace">水印在修改图片中距左边的宽度</param> /// <param name="iMarkButtomSpace">水印在修改图片中距底部的高度</param> /// <param name="iDiaphaneity">水印图片的透明度</param> /// <param name="iFontRightSpace">文字</param> /// <param name="iFontButtomSpace">文字</param> /// <param name="iFontDiaphaneity">文字</param> /// <param name="bShowCopyright">是否显示文字</param> /// <param name="bShowMarkImage">是否显示水印图片</param>
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; }
/// <summary> /// 主要用两样都加的 /// </summary> 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
/// <summary> /// 设置是否显示水印文字 /// </summary> public bool ShowCopyright { set { this.bShowCopyright = value; } }
/// <summary> /// 设置是否显示水印图片 /// </summary> public bool ShowMarkImage { set { this.bShowMarkImage = value; } } /// <summary> /// 获取或设置要加入的文字 /// </summary> public string Copyright { set { this.strCopyright = value; } }
/// <summary> /// 获取或设置加水印后的图片路径 /// </summary> public string SavePath { get { return this.strSavePath; } set { this.strSavePath = value; } }
/// <summary> /// 获取或设置水印图片路径 /// </summary> public string MarkPath { get { return this.strMarkPath; } set { this.strMarkPath = value; } }
/// <summary> /// 获取或设置要加水印图片的路径 /// </summary> public string PhotoPath { get { return this.strPhotoPath; } set { this.strPhotoPath = value; } }
/// <summary> /// 设置水印图片的透明度 /// </summary> public int Diaphaneity { set { if(value > 0 && value <= 100) this.iDiaphaneity = value; } }
/// <summary> /// 设置水印字体的透明度0-255 /// </summary> public int FontDiaphaneity { set { if (value >= 0 && value <= 255) this.iFontDiaphaneity = value; } }
/// <summary> /// 设置水印图片在修改图片中距左边的高度 /// </summary> public int MarkRightSpace { set { this.iMarkRightSpace = value; } }
/// <summary> /// 设置水印图片在修改图片中距底部的高度 /// </summary> public int MarkButtomSpace { set { this.iMarkButtomSpace = value; } }
/// <summary> /// 设置水印字体在修改图片中距左边的距离 /// </summary> public int FontRightSpace { set { iFontRightSpace = value; } }
/// <summary> /// 设置水印字体在修改图片中距底部的高度 /// </summary> public int FontButtomSpace { set { iFontButtomSpace = value; } }
#endregion
/// <summary> /// 生成水印图片 /// </summary> /// <returns></returns> public void createMarkPhoto() { Bitmap bmWatermark = null; Image gPhoto = Image.FromFile(this.strPhotoPath); int PhotoWidth = gPhoto.Width; int PhotoHeight = gPhoto.Height; Bitmap bitPhoto = new Bitmap(PhotoWidth, PhotoHeight,PixelFormat.Format24bppRgb); bitPhoto.SetResolution(gPhoto.HorizontalResolution,gPhoto.VerticalResolution);
try { if (bShowCopyright) { Graphics grPhoto = Graphics.FromImage(bitPhoto); grPhoto.SmoothingMode = SmoothingMode.AntiAlias; 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(iMarkRightSpace, iMarkButtomSpace, iMarkWidth, iMarkmHeight), 0, 0, iMarkWidth, iMarkmHeight, GraphicsUnit.Pixel, imageAttributes);
gPhoto = bmWatermark; grWatermark.Dispose(); imgWatermark.Dispose(); } gPhoto.Save(strSavePath, ImageFormat.Jpeg); } finally {
if (bitPhoto!=null) bitPhoto.Dispose();
if (bmWatermark != null) bmWatermark.Dispose();
gPhoto.Dispose(); } } }}
