using System;
using System.Collections.Generic;
using System.Drawing;
using System.Drawing.Imaging;
using System.IO;
using System.Net;
using System.Text;
using System.Text.RegularExpressions;
using System.Windows;namespace WaterMarkAPP.Common
{public class ClipboardHelper{/// <summary>/// 获取剪贴板里的图片/// </summary>/// <returns></returns>public static IEnumerable<string> GetImagePathList(){var imgPathList = new List<string>();var data = Clipboard.GetDataObject();var formats = data.GetFormats();//二进制存储 (存储在剪贴板的截图|画画图内的图片)if (data.GetDataPresent(DataFormats.Dib, true)){var imgSorce = Clipboard.GetImage();Bitmap bmp = new Bitmap(imgSorce.PixelWidth, imgSorce.PixelHeight, PixelFormat.Format32bppPArgb);BitmapData bmpdata = bmp.LockBits(new Rectangle(System.Drawing.Point.Empty, bmp.Size), ImageLockMode.WriteOnly, PixelFormat.Format32bppPArgb);imgSorce.CopyPixels(Int32Rect.Empty, bmpdata.Scan0, bmpdata.Height * bmpdata.Stride, bmpdata.Stride);bmp.UnlockBits(bmpdata);CreateDirectory();string filePath = string.Format(@"Images\{0}.png", Guid.NewGuid());bmp.Save(filePath, ImageFormat.Png);imgPathList.Add(filePath);}//图片文件if (data.GetDataPresent(DataFormats.FileDrop, true)){string[] objs = (string[])data.GetData(DataFormats.FileDrop, true);if (objs != null){for (int i = 0; i < objs.Length; i++){imgPathList.Add(objs[i]);}}}//剪贴板内单文件if (data.GetDataPresent(DataFormats.Bitmap, true)){string filePath = SaveImg(data.GetData(DataFormats.Bitmap, true) as Bitmap);if (filePath != null) { imgPathList.Add(filePath); }}//HTML页面里面的图片（网页 + word）if (data.GetDataPresent(DataFormats.Html, true)){var obj = data.GetData(DataFormats.Html, true);if (obj != null){string dataStr = obj.ToString();imgPathList.AddRange(DownloadImg(dataStr));}}return imgPathList;}/// <summary>/// 保存图片，返回图片地址/// </summary>/// <param name="bitmap"></param>/// <returns></returns>private static string SaveImg(Bitmap bitmap){if (bitmap == null) { return null; }CreateDirectory();string filePath = string.Format(@"Images\{0}.png", Guid.NewGuid());try { bitmap.Save(filePath, ImageFormat.Png); return filePath; }catch (Exception ex) { DNTLog(ex); return null; }}/// <summary>/// 批量下载图片/// </summary>/// <param name="dataStr">页面字符串</param>/// <param name="i">成功条数</param>/// <returns></returns>private static IEnumerable<string> DownloadImg(string dataStr){var imgPathList = new List<string>();var collection = Regex.Matches(dataStr, @"<img([^>]*)\s*src=('|\"")([^'\""]+)('|\"")", RegexOptions.ECMAScript);WebClient webClient = new WebClient();foreach (Match item in collection){string imgPath = item.Groups[3].Value;try{CreateDirectory();string filePath = string.Format(@"Images\{0}", Path.GetFileName(imgPath));webClient.DownloadFile(item.Groups[3].Value, filePath);//剪贴板的图片没有相对路径imgPathList.Add(string.Format(@"{0}\{1}", Directory.GetCurrentDirectory(), filePath));}catch (Exception ex) { DNTLog(ex); }}return imgPathList;}private static void DNTLog(Exception ex){File.WriteAllText("log.dnt", ex.ToString(), Encoding.UTF8);}/// <summary>/// 创建文件夹/// </summary>private static void CreateDirectory(){if (!Directory.Exists("Images")){Directory.CreateDirectory("Images");}}}
}

using System.Drawing;
using System.Drawing.Drawing2D;
using System.Drawing.Imaging;
using System.Text;
using WaterMarkAPP.Enums;
using WaterMarkAPP.Model;namespace WaterMarkAPP.Common
{/// <summary>/// 水印帮助类/// </summary>public class WaterMarkHelper{public static bool TryFromFile(string imgPath, ref Image img){try{img = Image.FromFile(imgPath);return true;}catch{return false;}}#region 设置水印/// <summary>/// 设置水印/// </summary>/// <param name="imgPath"></param>/// <param name="model"></param>/// <returns></returns>public static Image SetWaterMark(string imgPath, WaterMark model){Image imgSource = null;//背景图Image markImg = null;//水印图片if (!TryFromFile(imgPath, ref imgSource)){return null;}//水印检验（文字，图片[路径下是否存在图片]）#region 水印校验+水印处理if (model == null) { return null; }if (!System.IO.File.Exists(imgPath)) { return null; }//看看原图是否存在//根据水印类型校验+水印处理switch (model.WaterMarkType){case WaterMarkTypeEnum.Text:if (string.IsNullOrEmpty(model.Text)){return null;}else{markImg = TextToImager(model);//水印处理-如果是文字就转换成图片}break;case WaterMarkTypeEnum.Image:if (!System.IO.File.Exists(model.ImgPath)){return null;}else{if (!TryFromFile(model.ImgPath, ref markImg))//获得水印图像{return imgSource;}}break;case WaterMarkTypeEnum.NoneMark:return imgSource;}#endregion#region 创建颜色矩阵//创建颜色矩阵float[][] ptsArray ={new float[] {1, 0, 0, 0, 0},new float[] {0, 1, 0, 0, 0},new float[] {0, 0, 1, 0, 0},new float[] {0, 0, 0, model.Transparency, 0}, //注意：0.0f为完全透明，1.0f为完全不透明new float[] {0, 0, 0, 0, 1}};ColorMatrix colorMatrix = new ColorMatrix(ptsArray);//新建一个Image属性ImageAttributes imageAttributes = new ImageAttributes();//将颜色矩阵添加到属性imageAttributes.SetColorMatrix(colorMatrix, ColorMatrixFlag.Default, ColorAdjustType.Default);#endregion//原图格式检验+水印#region 原图格式检验+水印//判断是否是索引图像格式if (imgSource.PixelFormat == PixelFormat.Format1bppIndexed || imgSource.PixelFormat == PixelFormat.Format4bppIndexed || imgSource.PixelFormat == PixelFormat.Format8bppIndexed){#region 索引图片,转成位图再加图片//转成位图,这步很重要 Bitmap bitmap = new Bitmap(imgSource.Width, imgSource.Height);Graphics graphic = Graphics.FromImage(bitmap);#region 缩放处理//如果原图小于水印图片 等比缩放水印图if (markImg.Width >= imgSource.Width || markImg.Height >= imgSource.Height){markImg = ImageShrink(imgSource, markImg);}#endregion#region 水印位置//水印位置int x;int y;WaterMarkLocations(model, imgSource, markImg, out x, out y);#endregion//将原图画在位图上graphic.DrawImage(imgSource, new Point(0, 0));//将水印加在位图上graphic.DrawImage(markImg, new Rectangle(x, y, markImg.Width, markImg.Height), 0, 0, markImg.Width, markImg.Height, GraphicsUnit.Pixel, imageAttributes);graphic.Dispose();return bitmap;#endregion}else{#region 非索引图片,直接在上面加上水印Graphics graphic = Graphics.FromImage(imgSource);#region 缩放处理//如果原图小于水印图片 等比缩放水印图if (markImg.Width >= imgSource.Width || markImg.Height >= imgSource.Height){markImg = ImageShrink(imgSource, markImg);}#endregion#region 水印位置//水印位置int x;int y;WaterMarkLocations(model, imgSource, markImg, out x, out y);#endregion//将水印加在原图上graphic.DrawImage(markImg, new Rectangle(x, y, markImg.Width, markImg.Height), 0, 0, markImg.Width, markImg.Height, GraphicsUnit.Pixel, imageAttributes);graphic.Dispose();return imgSource;#endregion}#endregion}#endregion#region 水印处理-文字转图片/// <summary>/// 水印处理-文字转图片/// </summary>/// <param name="model"></param>/// <returns></returns>private static Image TextToImager(WaterMark model){Font f = new Font(model.FontFamily, model.FontSize, model.FontStyle);Bitmap fbitmap = new Bitmap(Encoding.GetEncoding("GBK").GetByteCount(model.Text) / 2 * f.Height, f.Height);Graphics gh = Graphics.FromImage(fbitmap);//创建一个画板;gh.SmoothingMode = SmoothingMode.AntiAlias;gh.DrawString(model.Text, f, model.BrushesColor, 0, 0);//画字符串return fbitmap as Image;}#endregion#region 水印位置/// <summary>/// 水印位置/// </summary>/// <param name="model"></param>/// <param name="imgSource"></param>/// <param name="markImg"></param>/// <param name="x"></param>/// <param name="y"></param>private static void WaterMarkLocations(WaterMark model, Image imgSource, Image markImg, out int x, out int y){x = 0;y = 0;switch (model.WaterMarkLocation){case WaterMarkLocationEnum.TopLeft:x = 0;y = 0;break;case WaterMarkLocationEnum.TopCenter:x = imgSource.Width / 2 - markImg.Width / 2;y = 0;break;case WaterMarkLocationEnum.TopRight:x = imgSource.Width - markImg.Width;y = 0;break;case WaterMarkLocationEnum.CenterLeft:x = 0;y = imgSource.Height / 2 - markImg.Height / 2;break;case WaterMarkLocationEnum.CenterCenter:x = imgSource.Width / 2 - markImg.Width / 2;y = imgSource.Height / 2 - markImg.Height / 2;break;case WaterMarkLocationEnum.CenterRight:x = imgSource.Width - markImg.Width;y = imgSource.Height / 2 - markImg.Height / 2;break;case WaterMarkLocationEnum.BottomLeft:x = 0;y = imgSource.Height - markImg.Height;break;case WaterMarkLocationEnum.BottomCenter:x = imgSource.Width / 2 - markImg.Width / 2;y = imgSource.Height - markImg.Height;break;case WaterMarkLocationEnum.BottomRight:x = imgSource.Width - markImg.Width;y = imgSource.Height - markImg.Height;break;}}#endregion#region 缩放水印/// <summary>/// 等比缩放水印图（缩小到原图的1/3）/// </summary>/// <param name="imgSource"></param>/// <param name="successImage"></param>/// <returns></returns>private static Image ImageShrink(Image imgSource, Image markImg){int w = 0;int h = 0;Image.GetThumbnailImageAbort callb = null;//对水印图片生成缩略图,缩小到原图的1/3(以短的一边为准)                     if (imgSource.Width < imgSource.Height){w = imgSource.Width / 3;h = markImg.Height * w / markImg.Width;}else{h = imgSource.Height / 3;w = markImg.Width * h / markImg.Height;}markImg = markImg.GetThumbnailImage(w, h, callb, new System.IntPtr());return markImg;}#endregion}
}