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/*
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*
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* 使用说明：
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* 建议先定义一个WaterImage实例
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* 然后利用实例的属性，去匹配需要进行操作的参数
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* 然后定义一个WaterImageManage实例
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* 利用WaterImageManage实例进行DrawImage（），印图片水印
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* DrawWords（）印文字水印
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*
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*/
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using System;
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using System.Drawing;
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using System.Drawing.Imaging;
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using System.Drawing.Drawing2D;
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namespace BP.WF.Rpt
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{
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/// <summary>
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/// 图片位置
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/// </summary>
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public enum ImagePosition
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{
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LeftTop, //左上
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LeftBottom, //左下
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RightTop, //右上
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RigthBottom, //右下
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TopMiddle, //顶部居中
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BottomMiddle, //底部居中
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Center //中心
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}
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/// <summary>
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/// 水印图片的操作管理 Design by Gary Gong From Demetersoft.com
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/// </summary>
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public class WaterImageManage
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{
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/// <summary>
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/// 生成一个新的水印图片制作实例
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/// </summary>
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public WaterImageManage()
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{
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//
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// TODO: Add constructor logic here
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//
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}
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/// <summary>
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/// 添加图片水印
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/// </summary>
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/// <param name="sourcePicture">源图片文件名</param>
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/// <param name="waterImage">水印图片文件名</param>
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/// <param name="alpha">透明度(0.1-1.0数值越小透明度越高)</param>
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/// <param name="position">位置</param>
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/// <param name="PicturePath" >图片的路径</param>
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/// <returns>返回生成于指定文件夹下的水印文件名</returns>
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public string DrawImage(string sourcePicture,
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string waterImage,
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float alpha,
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ImagePosition position,
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string PicturePath)
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{
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//
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// 判断参数是否有效
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//
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if (sourcePicture == string.Empty || waterImage == string.Empty || alpha == 0.0 || PicturePath == string.Empty)
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{
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return sourcePicture;
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}
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//
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// 源图片，水印图片全路径
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//
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string sourcePictureName = PicturePath + sourcePicture;
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string waterPictureName = PicturePath + waterImage;
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string fileSourceExtension = System.IO.Path.GetExtension(sourcePictureName).ToLower();
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string fileWaterExtension = System.IO.Path.GetExtension(waterPictureName).ToLower();
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//
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// 判断文件是否存在,以及类型是否正确
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//
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if (System.IO.File.Exists(sourcePictureName) == false ||
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System.IO.File.Exists(waterPictureName) == false || (
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fileSourceExtension != ".gif" &&
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fileSourceExtension != ".jpg" &&
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fileSourceExtension != ".png") || (
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fileWaterExtension != ".gif" &&
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fileWaterExtension != ".jpg" &&
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fileWaterExtension != ".png")
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)
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{
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return sourcePicture;
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}
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//
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// 目标图片名称及全路径
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//
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string targetImage = sourcePictureName.Replace(System.IO.Path.GetExtension(sourcePictureName), "") + "_1101.jpg";
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//
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// 将需要加上水印的图片装载到Image对象中
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//
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Image imgPhoto = Image.FromFile(sourcePictureName);
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//
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// 确定其长宽
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//
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int phWidth = imgPhoto.Width;
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int phHeight = imgPhoto.Height;
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//
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// 封装 GDI+ 位图，此位图由图形图像及其属性的像素数据组成。
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//
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Bitmap bmPhoto = new Bitmap(phWidth, phHeight, PixelFormat.Format24bppRgb);
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//
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// 设定分辨率
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//
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bmPhoto.SetResolution(imgPhoto.HorizontalResolution, imgPhoto.VerticalResolution);
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//
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// 定义一个绘图画面用来装载位图
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//
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Graphics grPhoto = Graphics.FromImage(bmPhoto);
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//
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//同样，由于水印是图片，我们也需要定义一个Image来装载它
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//
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Image imgWatermark = new Bitmap(waterPictureName);
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//
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// 获取水印图片的高度和宽度
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//
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int wmWidth = imgWatermark.Width;
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int wmHeight = imgWatermark.Height;
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//SmoothingMode：指定是否将平滑处理（消除锯齿）应用于直线、曲线和已填充区域的边缘。
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// 成员名称 说明
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// AntiAlias 指定消除锯齿的呈现。
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// Default 指定不消除锯齿。
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// HighQuality 指定高质量、低速度呈现。
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// HighSpeed 指定高速度、低质量呈现。
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// Invalid 指定一个无效模式。
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// None 指定不消除锯齿。
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grPhoto.SmoothingMode = SmoothingMode.AntiAlias;
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//
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// 第一次描绘，将我们的底图描绘在绘图画面上
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//
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grPhoto.DrawImage(imgPhoto,
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new Rectangle(0, 0, phWidth, phHeight),
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0,
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0,
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phWidth,
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phHeight,
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GraphicsUnit.Pixel);
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//
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// 与底图一样，我们需要一个位图来装载水印图片。并设定其分辨率
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//
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Bitmap bmWatermark = new Bitmap(bmPhoto);
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bmWatermark.SetResolution(imgPhoto.HorizontalResolution, imgPhoto.VerticalResolution);
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//
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// 继续，将水印图片装载到一个绘图画面grWatermark
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//
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Graphics grWatermark = Graphics.FromImage(bmWatermark);
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//
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//ImageAttributes 对象包含有关在呈现时如何操作位图和图元文件颜色的信息。
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//
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ImageAttributes imageAttributes = new ImageAttributes();
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//
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//Colormap: 定义转换颜色的映射
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//
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ColorMap colorMap = new ColorMap();
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//
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//我的水印图被定义成拥有绿色背景色的图片被替换成透明
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//
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colorMap.OldColor = Color.FromArgb(255, 0, 255, 0);
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colorMap.NewColor = Color.FromArgb(0, 0, 0, 0);
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ColorMap[] remapTable = { colorMap };
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imageAttributes.SetRemapTable(remapTable, ColorAdjustType.Bitmap);
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float[][] colorMatrixElements = {
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new float[] {1.0f, 0.0f, 0.0f, 0.0f, 0.0f}, // red红色
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new float[] {0.0f, 1.0f, 0.0f, 0.0f, 0.0f}, //green绿色
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new float[] {0.0f, 0.0f, 1.0f, 0.0f, 0.0f}, //blue蓝色
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new float[] {0.0f, 0.0f, 0.0f, alpha, 0.0f}, //透明度
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new float[] {0.0f, 0.0f, 0.0f, 0.0f, 1.0f}};//
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// ColorMatrix:定义包含 RGBA 空间坐标的 5 x 5 矩阵。
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// ImageAttributes 类的若干方法通过使用颜色矩阵调整图像颜色。
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ColorMatrix wmColorMatrix = new ColorMatrix(colorMatrixElements);
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imageAttributes.SetColorMatrix(wmColorMatrix, ColorMatrixFlag.Default,
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ColorAdjustType.Bitmap);
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//
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//上面设置完颜色，下面开始设置位置
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//
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int xPosOfWm;
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int yPosOfWm;
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switch (position)
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{
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case ImagePosition.BottomMiddle:
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xPosOfWm = (phWidth - wmWidth) / 2;
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yPosOfWm = phHeight - wmHeight - 10;
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break;
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case ImagePosition.Center:
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xPosOfWm = (phWidth - wmWidth) / 2;
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yPosOfWm = (phHeight - wmHeight) / 2;
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break;
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case ImagePosition.LeftBottom:
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xPosOfWm = 10;
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yPosOfWm = phHeight - wmHeight - 10;
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break;
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case ImagePosition.LeftTop:
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xPosOfWm = 10;
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yPosOfWm = 10;
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break;
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case ImagePosition.RightTop:
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xPosOfWm = phWidth - wmWidth - 10;
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yPosOfWm = 10;
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break;
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case ImagePosition.RigthBottom:
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xPosOfWm = phWidth - wmWidth - 10;
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yPosOfWm = phHeight - wmHeight - 10;
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break;
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case ImagePosition.TopMiddle:
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xPosOfWm = (phWidth - wmWidth) / 2;
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yPosOfWm = 10;
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break;
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default:
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xPosOfWm = 10;
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yPosOfWm = phHeight - wmHeight - 10;
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break;
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}
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// 第二次绘图，把水印印上去
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//
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grWatermark.DrawImage(imgWatermark,
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new Rectangle(xPosOfWm,
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yPosOfWm,
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wmWidth,
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wmHeight),
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0,
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0,
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wmWidth,
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wmHeight,
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GraphicsUnit.Pixel,
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imageAttributes);
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imgPhoto = bmWatermark;
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grPhoto.Dispose();
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grWatermark.Dispose();
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//
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// 保存文件到服务器的文件夹里面
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//
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imgPhoto.Save(targetImage, ImageFormat.Jpeg);
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imgPhoto.Dispose();
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imgWatermark.Dispose();
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return targetImage.Replace(PicturePath, "");
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}
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/*
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*
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* 使用说明：
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* 建议先定义一个WaterImage实例
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* 然后利用实例的属性，去匹配需要进行操作的参数
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* 然后定义一个WaterImageManage实例
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* 利用WaterImageManage实例进行DrawImage（），印图片水印
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* DrawWords（）印文字水印
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*
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-*/
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/// <summary>
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/// 在图片上添加水印文字
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/// </summary>
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/// <param name="sourcePicture">源图片文件(文件名，不包括路径)</param>
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/// <param name="waterWords">需要添加到图片上的文字</param>
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/// <param name="alpha">透明度</param>
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/// <param name="position">位置</param>
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/// <param name="targetImage">目标图片名称及全路径</param>
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/// <returns></returns>
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public string DrawWords(string sourcePictureName,
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string waterWords,
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float alpha,
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ImagePosition position,
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string targetImage)
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{
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//
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// 判断参数是否有效
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//
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if (sourcePictureName == string.Empty || waterWords == string.Empty || alpha == 0.0 || sourcePictureName == string.Empty)
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throw new Exception("@参数错误");
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//
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// 源图片全路径
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//
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string fileExtension = System.IO.Path.GetExtension(sourcePictureName).ToLower();
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//
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// 判断文件是否存在,以及文件名是否正确
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//
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if (System.IO.File.Exists(sourcePictureName) == false || (
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fileExtension != ".gif" &&
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fileExtension != ".jpg" &&
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fileExtension != ".png"))
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{
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throw new Exception("@源文件格式错误" + sourcePictureName);
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}
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//创建一个图片对象用来装载要被添加水印的图片
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Image imgPhoto = Image.FromFile(sourcePictureName);
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//获取图片的宽和高
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int phWidth = imgPhoto.Width;
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int phHeight = imgPhoto.Height;
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//
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//建立一个bitmap，和我们需要加水印的图片一样大小
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Bitmap bmPhoto = new Bitmap(phWidth, phHeight, PixelFormat.Format24bppRgb);
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//SetResolution：设置此 Bitmap 的分辨率
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//这里直接将我们需要添加水印的图片的分辨率赋给了bitmap
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bmPhoto.SetResolution(imgPhoto.HorizontalResolution, imgPhoto.VerticalResolution);
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//Graphics：封装一个 GDI+ 绘图图面。
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Graphics grPhoto = Graphics.FromImage(bmPhoto);
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//设置图形的品质
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grPhoto.SmoothingMode = SmoothingMode.AntiAlias;
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//将我们要添加水印的图片按照原始大小描绘（复制）到图形中
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grPhoto.DrawImage(
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imgPhoto, // 要添加水印的图片
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new Rectangle(0, 0, phWidth, phHeight), // 根据要添加的水印图片的宽和高
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0, // X方向从0点开始描绘
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0, // Y方向
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phWidth, // X方向描绘长度
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phHeight, // Y方向描绘长度
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GraphicsUnit.Pixel); // 描绘的单位，这里用的是像素
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//根据图片的大小我们来确定添加上去的文字的大小
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//在这里我们定义一个数组来确定
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int[] sizes = new int[] { 16, 14, 12, 10, 8, 6, 4 };
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//字体
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Font crFont = null;
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//矩形的宽度和高度，SizeF有三个属性，分别为Height高，width宽，IsEmpty是否为空
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SizeF crSize = new SizeF();
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//利用一个循环语句来选择我们要添加文字的型号
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//直到它的长度比图片的宽度小
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for (int i = 0; i < 7; i++)
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{
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crFont = new Font("arial", sizes[i], FontStyle.Italic);
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//测量用指定的 Font 对象绘制并用指定的 StringFormat 对象格式化的指定字符串。
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crSize = grPhoto.MeasureString(waterWords, crFont);
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// ushort 关键字表示一种整数数据类型
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if ((ushort)crSize.Width < (ushort)phWidth)
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break;
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}
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//截边5%的距离，定义文字显示(由于不同的图片显示的高和宽不同，所以按百分比截取)
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int yPixlesFromBottom = (int)(phHeight * .05);
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//定义在图片上文字的位置
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float wmHeight = crSize.Height;
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float wmWidth = crSize.Width;
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float xPosOfWm;
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float yPosOfWm;
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switch (position)
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{
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case ImagePosition.BottomMiddle:
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xPosOfWm = phWidth / 2;
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yPosOfWm = phHeight - wmHeight - 10;
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break;
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case ImagePosition.Center:
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xPosOfWm = phWidth / 2;
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yPosOfWm = phHeight / 2;
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break;
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case ImagePosition.LeftBottom:
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xPosOfWm = wmWidth;
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yPosOfWm = phHeight - wmHeight - 10;
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break;
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case ImagePosition.LeftTop:
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xPosOfWm = wmWidth / 2;
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yPosOfWm = wmHeight / 2;
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break;
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case ImagePosition.RightTop:
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xPosOfWm = phWidth - wmWidth - 10;
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yPosOfWm = wmHeight;
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break;
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case ImagePosition.RigthBottom:
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xPosOfWm = phWidth - wmWidth - 10;
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|
yPosOfWm = phHeight - wmHeight - 10;
|
|
|
break;
|
|
|
case ImagePosition.TopMiddle:
|
|
|
xPosOfWm = phWidth / 2;
|
|
|
yPosOfWm = wmWidth;
|
|
|
|
|
|
break;
|
|
|
default:
|
|
|
xPosOfWm = wmWidth;
|
|
|
yPosOfWm = phHeight - wmHeight - 10;
|
|
|
break;
|
|
|
}
|
|
|
|
|
|
//封装文本布局信息（如对齐、文字方向和 Tab 停靠位），显示操作（如省略号插入和国家标准 (National) 数字替换）和 OpenType 功能。
|
|
|
StringFormat StrFormat = new StringFormat();
|
|
|
|
|
|
|
|
|
//定义需要印的文字居中对齐
|
|
|
StrFormat.Alignment = StringAlignment.Center;
|
|
|
|
|
|
//SolidBrush:定义单色画笔。画笔用于填充图形形状，如矩形、椭圆、扇形、多边形和封闭路径。
|
|
|
//这个画笔为描绘阴影的画笔，呈灰色
|
|
|
int m_alpha = Convert.ToInt32(256 * alpha);
|
|
|
SolidBrush semiTransBrush2 = new SolidBrush(Color.FromArgb(m_alpha, 0, 0, 0));
|
|
|
|
|
|
//描绘文字信息，这个图层向右和向下偏移一个像素，表示阴影效果
|
|
|
//DrawString 在指定矩形并且用指定的 Brush 和 Font 对象绘制指定的文本字符串。
|
|
|
grPhoto.DrawString(waterWords, //string of text
|
|
|
crFont, //font
|
|
|
semiTransBrush2, //Brush
|
|
|
new PointF(xPosOfWm + 1, yPosOfWm + 1), //Position
|
|
|
StrFormat);
|
|
|
|
|
|
//从四个 ARGB 分量（alpha、红色、绿色和蓝色）值创建 Color 结构，这里设置透明度为153
|
|
|
//这个画笔为描绘正式文字的笔刷，呈白色
|
|
|
SolidBrush semiTransBrush = new SolidBrush(Color.FromArgb(153, 255, 255, 255));
|
|
|
|
|
|
//第二次绘制这个图形，建立在第一次描绘的基础上
|
|
|
grPhoto.DrawString(waterWords, //string of text
|
|
|
crFont, //font
|
|
|
semiTransBrush, //Brush
|
|
|
new PointF(xPosOfWm, yPosOfWm), //Position
|
|
|
StrFormat);
|
|
|
|
|
|
//imgPhoto是我们建立的用来装载最终图形的Image对象
|
|
|
//bmPhoto是我们用来制作图形的容器，为Bitmap对象
|
|
|
imgPhoto = bmPhoto;
|
|
|
//释放资源，将定义的Graphics实例grPhoto释放，grPhoto功德圆满
|
|
|
grPhoto.Dispose();
|
|
|
|
|
|
//将grPhoto保存
|
|
|
imgPhoto.Save(targetImage, ImageFormat.Jpeg);
|
|
|
imgPhoto.Dispose();
|
|
|
|
|
|
return targetImage;
|
|
|
|
|
|
//return targetImage.Replace(PicturePath, "");
|
|
|
}
|
|
|
|
|
|
private SolidBrush RndBrush(Color BackColor, Random rnd)
|
|
|
{
|
|
|
int r, g, b;
|
|
|
do
|
|
|
{
|
|
|
r = rnd.Next(255);
|
|
|
} while (Math.Abs(r - BackColor.R) < 50); //这是为了控制颜色不要和背景色太接近
|
|
|
do
|
|
|
{
|
|
|
g = rnd.Next(255);
|
|
|
} while (Math.Abs(g - BackColor.G) < 50);
|
|
|
do
|
|
|
{
|
|
|
b = rnd.Next(255);
|
|
|
} while (Math.Abs(b - BackColor.B) < 50);
|
|
|
return new SolidBrush(Color.FromArgb(255, r, g, b));
|
|
|
}
|
|
|
}
|
|
|
|
|
|
/// <summary>
|
|
|
/// 装载水印图片的相关信息
|
|
|
/// </summary>
|
|
|
public class WaterImage
|
|
|
{
|
|
|
/// <summary>
|
|
|
/// 水文
|
|
|
/// </summary>
|
|
|
public WaterImage()
|
|
|
{
|
|
|
}
|
|
|
|
|
|
private string m_sourcePicture;
|
|
|
/// <summary>
|
|
|
/// 源图片地址名字(带后缀)
|
|
|
|
|
|
/// </summary>
|
|
|
public string SourcePicture
|
|
|
{
|
|
|
get { return m_sourcePicture; }
|
|
|
set { m_sourcePicture = value; }
|
|
|
}
|
|
|
|
|
|
private string m_waterImager;
|
|
|
/// <summary>
|
|
|
/// 水印图片名字(带后缀)
|
|
|
/// </summary>
|
|
|
public string WaterPicture
|
|
|
{
|
|
|
get { return m_waterImager; }
|
|
|
set { m_waterImager = value; }
|
|
|
}
|
|
|
|
|
|
private float m_alpha;
|
|
|
/// <summary>
|
|
|
/// 水印图片文字的透明度
|
|
|
/// </summary>
|
|
|
public float Alpha
|
|
|
{
|
|
|
get { return m_alpha; }
|
|
|
set { m_alpha = value; }
|
|
|
}
|
|
|
|
|
|
private ImagePosition m_postition;
|
|
|
/// <summary>
|
|
|
/// 水印图片或文字在图片中的位置
|
|
|
/// </summary>
|
|
|
public ImagePosition Position
|
|
|
{
|
|
|
get { return m_postition; }
|
|
|
set { m_postition = value; }
|
|
|
}
|
|
|
|
|
|
private string m_words;
|
|
|
/// <summary>
|
|
|
/// 水印文字的内容
|
|
|
/// </summary>
|
|
|
public string Words
|
|
|
{
|
|
|
get { return m_words; }
|
|
|
set { m_words = value; }
|
|
|
}
|
|
|
|
|
|
}
|
|
|
} |