一、图片上加文字:
//using System.Drawing; | |
//using System.IO; | |
//using System.Drawing.Imaging; | |
private void AddTextToImg(string fileName,string text) | |
{ | |
if(!File.Exists(MapPath(fileName))) | |
{ | |
throw new FileNotFoundException("The file don't exist!"); | |
} | |
if( text == string.Empty ) | |
{ | |
return; | |
} | |
//还需要判断文件类型是否为图像类型,这里就不赘述了 | |
System.Drawing.Image image = System.Drawing.Image.FromFile(MapPath(fileName)); | |
Bitmap bitmap = new Bitmap(image,image.Width,image.Height); | |
Graphics g = Graphics.FromImage(bitmap); | |
float fontSize = 12.0f; //字体大小 | |
float textWidth = text.Length*fontSize; //文本的长度 | |
//下面定义一个矩形区域,以后在这个矩形里画上白底黑字 | |
float rectX = 0; | |
float rectY = 0; | |
float rectWidth = text.Length*(fontSize+8); | |
float rectHeight = fontSize+8; | |
//声明矩形域 | |
RectangleF textArea = new RectangleF(rectX,rectY,rectWidth,rectHeight); | |
Font font = new Font("宋体",fontSize); //定义字体 | |
Brush whiteBrush = new SolidBrush(Color.White); //白笔刷,画文字用 | |
Brush blackBrush = new SolidBrush(Color.Black); //黑笔刷,画背景用 | |
g.FillRectangle(blackBrush,rectX,rectY,rectWidth,rectHeight); | |
g.DrawString(text,font,whiteBrush,textArea); | |
MemoryStream ms = new MemoryStream( ); | |
//保存为Jpg类型 | |
bitmap.Save(ms,ImageFormat.Jpeg); | |
//输出处理后的图像,这里为了演示方便,我将图片显示在页面中了 | |
Response.Clear(); | |
Response.ContentType = "image/jpeg"; | |
Response.BinaryWrite( ms.ToArray() ); | |
g.Dispose(); | |
bitmap.Dispose(); | |
image.Dispose(); | |
} |
二、图片上加水印:
//using System;
//using System.Web;
//using System.Drawing;
//using System.Drawing.Drawing2D;
//using System.Drawing.Imaging;
//using System.IO;
//using System.Reflection;
/// <summary>
/// 给图片上水印
/// </summary>
/// <param name="filePath">原图片地址</param>
/// <param name="waterFile">水印图片地址</param>
public void MarkWater(string filePath,string waterFile) | |
{ | |
//GIF不水印 | |
int i = filePath.LastIndexOf("."); | |
string ex = filePath.Substring(i,filePath.Length - i); | |
if(string.Compare(ex,".gif",true) == 0) | |
{ | |
return; | |
} | |
string ModifyImagePath = BasePath + filePath;//修改的图像路径 | |
int lucencyPercent=25; | |
Image modifyImage=null; | |
Image drawedImage=null; | |
Graphics g=null; | |
try | |
{ | |
//建立图形对象 | |
modifyImage=Image.FromFile(ModifyImagePath,true); | |
drawedImage=Image.FromFile(BasePath + waterFile,true); | |
g=Graphics.FromImage(modifyImage); | |
//获取要绘制图形坐标 | |
int x=modifyImage.Width-drawedImage.Width; | |
int y=modifyImage.Height-drawedImage.Height; | |
//设置颜色矩阵 | |
float[][] matrixItems ={ | |
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, (float)lucencyPercent/100f, 0}, | |
new float[] {0, 0, 0, 0, 1}}; | |
ColorMatrix colorMatrix = new ColorMatrix(matrixItems); | |
ImageAttributes imgAttr=new ImageAttributes(); | |
imgAttr.SetColorMatrix(colorMatrix,ColorMatrixFlag.Default,ColorAdjustType.Bitmap); | |
//绘制阴影图像 | |
g.DrawImage(drawedImage,new Rectangle(x,y,drawedImage.Width,drawedImage.Height),10,10,drawedImage.Width,drawedImage.Height,GraphicsUnit.Pixel,imgAttr); | |
//保存文件 | |
string[] allowImageType={".jpg",".gif",".png",".bmp",".tiff",".wmf",".ico"}; | |
FileInfo fi=new FileInfo(ModifyImagePath); | |
ImageFormat imageType=ImageFormat.Gif; | |
switch(fi.Extension.ToLower()) | |
{ | |
case ".jpg": imageType=ImageFormat.Jpeg; break; | |
case ".gif": imageType=ImageFormat.Gif; break; | |
case ".png": imageType=ImageFormat.Png; break; | |
case ".bmp": imageType=ImageFormat.Bmp; break; | |
case ".tif": imageType=ImageFormat.Tiff; break; | |
case ".wmf": imageType=ImageFormat.Wmf; break; | |
case ".ico": imageType=ImageFormat.Icon; break; | |
default: break; | |
} | |
MemoryStream ms=new MemoryStream(); | |
modifyImage.Save(ms,imageType); | |
byte[] imgData=ms.ToArray(); | |
modifyImage.Dispose(); | |
drawedImage.Dispose(); | |
g.Dispose(); | |
FileStream fs=null; | |
File.Delete(ModifyImagePath); | |
fs=new FileStream(ModifyImagePath,FileMode.Create,FileAccess.Write); | |
if(fs!=null) | |
{ | |
fs.Write(imgData,0,imgData.Length); | |
fs.Close(); | |
} | |
} | |
finally | |
{ | |
try | |
{ | |
drawedImage.Dispose(); | |
modifyImage.Dispose(); | |
g.Dispose(); | |
} | |
catch | |
{ | |
} | |
} | |
} |
三、 图片+水印(透明)函数
/// 添加图片水印 | |
/// </summary> | |
/// <param name="path">原图片绝对地址</param> | |
/// <param name="Ext">文件后缀</param> | |
public static string addWaterMark(string path,string fileExt) | |
{ | |
System.Drawing.Image image = System.Drawing.Image.FromFile(path); | |
Bitmap b = new Bitmap(image.Width, image.Height,System.Drawing.Imaging.PixelFormat.Format24bppRgb); | |
Graphics g = Graphics.FromImage(b); | |
g.Clear(Color.White); | |
g.DrawImage(image, 0, 0, image.Width, image.Height); | |
Image watermark = new Bitmap(ConfigurationSettings.AppSettings["PersonalPath"] + @"images\logo.jpg"); | |
System.Drawing.Imaging.ImageAttributes imageAttributes = new System.Drawing.Imaging.ImageAttributes(); | |
System.Drawing.Imaging.ColorMap colorMap = new System.Drawing.Imaging.ColorMap(); | |
colorMap.OldColor = Color.FromArgb(255, 0, 255, 0); | |
colorMap.NewColor = Color.FromArgb(0, 0, 0, 0); | |
System.Drawing.Imaging.ColorMap[] remapTable = {colorMap}; | |
imageAttributes.SetRemapTable(remapTable, System.Drawing.Imaging.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} | |
}; | |
System.Drawing.Imaging.ColorMatrix colorMatrix = new System.Drawing.Imaging.ColorMatrix(colorMatrixElements); | |
imageAttributes.SetColorMatrix(colorMatrix, System.Drawing.Imaging.ColorMatrixFlag.Default, System.Drawing.Imaging.ColorAdjustType.Bitmap); | |
int xpos = 0; | |
int ypos = 0; | |
xpos = ((image.Width - watermark.Width) - 10); | |
ypos = image.Height - watermark.Height - 10; | |
g.DrawImage(watermark, new Rectangle(xpos, ypos, watermark.Width, watermark.Height), 0, 0, watermark.Width, watermark.Height, GraphicsUnit.Pixel, imageAttributes); | |
watermark.Dispose(); | |
imageAttributes.Dispose(); | |
//保存加水印过后的图片,删除原始图片 | |
Random ro=new Random((int)DateTime.Now.Ticks); | |
string temppath = System.DateTime.Now.ToString("yyyy") + "\\" + System.DateTime.Now.ToString("MMdd"); | |
string fileName = temppath + "\\" + DateTime.Now.ToString("yyyyMMddHHmmss") + ro.Next(10000) + fileExt; | |
string filepath = Functions.GetUserFactPath(User.GetUserFromSession().Adddate,User.GetUserFromSession().UserId) + "3\\"; | |
b.Save(filepath + fileName); | |
b.Dispose(); | |
image.Dispose(); | |
if(File.Exists(path)) | |
{ | |
File.Delete(path); | |
} | |
return fileName; | |
} | |
四、C#图片水印生成类(图片、文字、透明水印)
/* | |
* Class:WaterImage | |
* Use for add a water Image to the picture both words and image | |
* 2007.07.23 create the file | |
* | |
* http://www.freeatom.com/ 欢迎您的来访 | |
* | |
* 使用说明: | |
* 建议先定义一个WaterImage实例 | |
* 然后利用实例的属性,去匹配需要进行操作的参数 | |
* 然后定义一个WaterImageManage实例 | |
* 利用WaterImageManage实例进行DrawImage(),印图片水印 | |
* DrawWords()印文字水印 | |
* | |
-*/ | |
using System; | |
using System.Drawing; | |
using System.Drawing.Imaging; | |
using System.Drawing.Drawing2D; | |
using System.IO; | |
/// <summary> | |
/// 图片位置 | |
/// </summary> | |
public enum ImagePosition | |
{ | |
LeftTop, //左上 | |
LeftBottom, //左下 | |
RightTop, //右上 | |
RigthBottom, //右下 | |
TopMiddle, //顶部居中 | |
BottomMiddle, //底部居中 | |
Center //中心 | |
} | |
/// <summary> | |
/// 水印图片的操作管理 Design by Gary Gong From Demetersoft.com | |
/// </summary> | |
public class WaterImageManage | |
{ | |
/// <summary> | |
/// 生成一个新的水印图片制作实例 | |
/// </summary> | |
public WaterImageManage () | |
{ | |
// | |
// TODO: Add constructor logic here | |
// | |
} | |
/// <summary> | |
/// 添加图片水印 | |
/// </summary> | |
/// <param name="sourcePicture">源图片文件名</param> | |
/// <param name="waterImage">水印图片文件名</param> | |
/// <param name="alpha">透明度(0.1-1.0数值越小透明度越高)</param> | |
/// <param name="position">位置</param> | |
/// <param name="PicturePath" >图片的路径</param> | |
/// <returns>返回生成于指定文件夹下的水印文件名</returns> | |
public string DrawImage(string sourcePicture, | |
string waterImage, | |
float alpha, | |
ImagePosition position, | |
string PicturePath ) | |
{ | |
// | |
// 判断参数是否有效 | |
// | |
if (sourcePicture == string.Empty || waterImage == string.Empty || alpha == 0.0 || PicturePath == string.Empty) | |
{ | |
return sourcePicture; | |
} | |
// | |
// 源图片,水印图片全路径 | |
// | |
string sourcePictureName = PicturePath + sourcePicture; | |
string waterPictureName = PicturePath + waterImage; | |
string fileSourceExtension = System.IO.Path.GetExtension(sourcePictureName).ToLower(); | |
string fileWaterExtension = System.IO.Path.GetExtension(waterPictureName).ToLower(); | |
// | |
// 判断文件是否存在,以及类型是否正确 | |
// | |
if (System.IO.File.Exists(sourcePictureName) == false || | |
System.IO.File.Exists(waterPictureName) == false ||( | |
fileSourceExtension != ".gif" && | |
fileSourceExtension != ".jpg" && | |
fileSourceExtension != ".png") || ( | |
fileWaterExtension != ".gif" && | |
fileWaterExtension != ".jpg" && | |
fileWaterExtension != ".png") | |
) | |
{ | |
return sourcePicture; | |
} | |
// | |
// 目标图片名称及全路径 | |
// | |
string targetImage = sourcePictureName.Replace ( System.IO.Path.GetExtension(sourcePictureName),"") + "_1101.jpg"; | |
// | |
// 将需要加上水印的图片装载到Image对象中 | |
// | |
Image imgPhoto = Image.FromFile(sourcePictureName); | |
// | |
// 确定其长宽 | |
// | |
int phWidth = imgPhoto.Width; | |
int phHeight = imgPhoto.Height; | |
// | |
// 封装 GDI+ 位图,此位图由图形图像及其属性的像素数据组成。 | |
// | |
Bitmap bmPhoto = new Bitmap(phWidth, phHeight, PixelFormat.Format24bppRgb); | |
// | |
// 设定分辨率 | |
// | |
bmPhoto.SetResolution(imgPhoto.HorizontalResolution, imgPhoto.VerticalResolution); | |
// | |
// 定义一个绘图画面用来装载位图 | |
// | |
Graphics grPhoto = Graphics.FromImage(bmPhoto); | |
// | |
//同样,由于水印是图片,我们也需要定义一个Image来装载它 | |
// | |
Image imgWatermark = new Bitmap(waterPictureName); | |
// | |
// 获取水印图片的高度和宽度 | |
// | |
int wmWidth = imgWatermark.Width; | |
int wmHeight = imgWatermark.Height; | |
//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。 | |
// 成员名称 说明 | |
// AntiAlias 指定消除锯齿的呈现。 | |
// Default 指定不消除锯齿。 | |
// HighQuality 指定高质量、低速度呈现。 | |
// HighSpeed 指定高速度、低质量呈现。 | |
// Invalid 指定一个无效模式。 | |
// None 指定不消除锯齿。 | |
grPhoto.SmoothingMode = SmoothingMode.AntiAlias; | |
// | |
// 第一次描绘,将我们的底图描绘在绘图画面上 | |
// | |
grPhoto.DrawImage(imgPhoto, | |
new Rectangle(0, 0, phWidth, phHeight), | |
0, | |
0, | |
phWidth, | |
phHeight, | |
GraphicsUnit.Pixel); | |
// | |
// 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 | |
// | |
Bitmap bmWatermark = new Bitmap(bmPhoto); | |
bmWatermark.SetResolution(imgPhoto.HorizontalResolution, imgPhoto.VerticalResolution); | |
// | |
// 继续,将水印图片装载到一个绘图画面grWatermark | |
// | |
Graphics grWatermark = Graphics.FromImage(bmWatermark); | |
// | |
//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。 | |
// | |
ImageAttributes imageAttributes = new ImageAttributes(); | |
// | |
//Colormap: 定义转换颜色的映射 | |
// | |
ColorMap colorMap = new ColorMap(); | |
// | |
//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 | |
// | |
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}, // red红色 | |
new float[] {0.0f, 1.0f, 0.0f, 0.0f, 0.0f}, //green绿色 | |
new float[] {0.0f, 0.0f, 1.0f, 0.0f, 0.0f}, //blue蓝色 | |
new float[] {0.0f, 0.0f, 0.0f, alpha, 0.0f}, //透明度 | |
new float[] {0.0f, 0.0f, 0.0f, 0.0f, 1.0f}};// | |
// ColorMatrix:定义包含 RGBA 空间坐标的 5 x 5 矩阵。 | |
// ImageAttributes 类的若干方法通过使用颜色矩阵调整图像颜色。 | |
ColorMatrix wmColorMatrix = new ColorMatrix(colorMatrixElements); | |
imageAttributes.SetColorMatrix(wmColorMatrix, ColorMatrixFlag.Default, | |
ColorAdjustType.Bitmap); | |
// | |
//上面设置完颜色,下面开始设置位置 | |
// | |
int xPosOfWm; | |
int yPosOfWm; | |
switch (position) | |
{ | |
case ImagePosition .BottomMiddle : | |
xPosOfWm = (phWidth-wmWidth ) / 2 ; | |
yPosOfWm = phHeight- wmHeight -10; | |
break ; | |
case ImagePosition .Center : | |
xPosOfWm = (phWidth - wmWidth) / 2; | |
yPosOfWm = (phHeight-wmHeight ) / 2; | |
break ; | |
case ImagePosition .LeftBottom : | |
xPosOfWm = 10; | |
yPosOfWm = phHeight - wmHeight - 10; | |
break ; | |
case ImagePosition .LeftTop : | |
xPosOfWm = 10; | |
yPosOfWm = 10; | |
break; | |
case ImagePosition .RightTop : | |
xPosOfWm = phWidth - wmWidth - 10; | |
yPosOfWm = 10; | |
break ; | |
case ImagePosition .RigthBottom : | |
xPosOfWm = phWidth - wmWidth - 10; | |
yPosOfWm = phHeight - wmHeight - 10; | |
break ; | |
case ImagePosition.TopMiddle : | |
xPosOfWm = (phWidth - wmWidth) / 2; | |
yPosOfWm = 10; | |
break ; | |
default: | |
xPosOfWm = 10; | |
yPosOfWm = phHeight - wmHeight - 10; | |
break; | |
} | |
// | |
// 第二次绘图,把水印印上去 | |
// | |
grWatermark.DrawImage(imgWatermark, | |
new Rectangle(xPosOfWm, | |
yPosOfWm, | |
wmWidth, | |
wmHeight), | |
0, | |
0, | |
wmWidth, | |
wmHeight, | |
GraphicsUnit.Pixel, | |
imageAttributes); | |
imgPhoto = bmWatermark; | |
grPhoto.Dispose(); | |
grWatermark.Dispose(); | |
// | |
// 保存文件到服务器的文件夹里面 | |
// | |
imgPhoto.Save(targetImage, ImageFormat.Jpeg); | |
imgPhoto.Dispose(); | |
imgWatermark.Dispose(); | |
return targetImage.Replace (PicturePath,""); | |
} | |
/// <summary> | |
/// 在图片上添加水印文字 | |
/// </summary> | |
/// <param name="sourcePicture">源图片文件</param> | |
/// <param name="waterWords">需要添加到图片上的文字</param> | |
/// <param name="alpha">透明度</param> | |
/// <param name="position">位置</param> | |
/// <param name="PicturePath">文件路径</param> | |
/// <returns></returns> | |
public string DrawWords(string sourcePicture, | |
string waterWords, | |
float alpha, | |
ImagePosition position, | |
string PicturePath) | |
{ | |
// | |
// 判断参数是否有效 | |
// | |
if (sourcePicture == string.Empty || waterWords == string.Empty || alpha == 0.0 || PicturePath == string.Empty) | |
{ | |
return sourcePicture; | |
} | |
// | |
// 源图片全路径 | |
// | |
string sourcePictureName = PicturePath + sourcePicture; | |
string fileExtension = System.IO.Path.GetExtension(sourcePictureName).ToLower(); | |
// | |
// 判断文件是否存在,以及文件名是否正确 | |
// | |
if (System.IO.File.Exists(sourcePictureName) == false || ( | |
fileExtension != ".gif" && | |
fileExtension != ".jpg" && | |
fileExtension != ".png" )) | |
{ | |
return sourcePicture; | |
} | |
// | |
// 目标图片名称及全路径 | |
// | |
string targetImage = sourcePictureName.Replace(System.IO.Path.GetExtension(sourcePictureName), "") + "_0703.jpg"; | |
//创建一个图片对象用来装载要被添加水印的图片 | |
Image imgPhoto = Image.FromFile(sourcePictureName); | |
//获取图片的宽和高 | |
int phWidth = imgPhoto.Width; | |
int phHeight = imgPhoto.Height; | |
// | |
//建立一个bitmap,和我们需要加水印的图片一样大小 | |
Bitmap bmPhoto = new Bitmap(phWidth, phHeight, PixelFormat.Format24bppRgb); | |
//SetResolution:设置此 Bitmap 的分辨率 | |
//这里直接将我们需要添加水印的图片的分辨率赋给了bitmap | |
bmPhoto.SetResolution(imgPhoto.HorizontalResolution, imgPhoto.VerticalResolution); | |
//Graphics:封装一个 GDI+ 绘图图面。 | |
Graphics grPhoto = Graphics.FromImage(bmPhoto); | |
//设置图形的品质 | |
grPhoto.SmoothingMode = SmoothingMode.AntiAlias; | |
//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 | |
grPhoto.DrawImage( | |
imgPhoto, // 要添加水印的图片 | |
new Rectangle(0, 0, phWidth, phHeight), // 根据要添加的水印图片的宽和高 | |
0, // X方向从0点开始描绘 | |
0, // Y方向 | |
phWidth, // X方向描绘长度 | |
phHeight, // Y方向描绘长度 | |
GraphicsUnit.Pixel); // 描绘的单位,这里用的是像素 | |
//根据图片的大小我们来确定添加上去的文字的大小 | |
//在这里我们定义一个数组来确定 | |
int[] sizes = new int[] { 16, 14, 12, 10, 8, 6, 4 }; | |
//字体 | |
Font crFont = null; | |
//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 | |
SizeF crSize = new SizeF(); | |
//利用一个循环语句来选择我们要添加文字的型号 | |
//直到它的长度比图片的宽度小 | |
for (int i = 0; i < 7; i++) | |
{ | |
crFont = new Font("arial", sizes[i], FontStyle.Bold); | |
//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。 | |
crSize = grPhoto.MeasureString(waterWords, crFont); | |
// ushort 关键字表示一种整数数据类型 | |
if ((ushort)crSize.Width < (ushort)phWidth) | |
break; | |
} | |
//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) | |
int yPixlesFromBottom = (int)(phHeight * .05); | |
//定义在图片上文字的位置 | |
float wmHeight = crSize.Height; | |
float wmWidth = crSize .Width ; | |
float xPosOfWm; | |
float yPosOfWm; | |
switch (position) | |
{ | |
case ImagePosition .BottomMiddle : | |
xPosOfWm = phWidth / 2 ; | |
yPosOfWm = phHeight- wmHeight -10; | |
break ; | |
case ImagePosition .Center : | |
xPosOfWm = phWidth / 2; | |
yPosOfWm = phHeight / 2; | |
break ; | |
case ImagePosition .LeftBottom : | |
xPosOfWm = wmWidth; | |
yPosOfWm = phHeight - wmHeight - 10; | |
break ; | |
case ImagePosition .LeftTop : | |
xPosOfWm = wmWidth/2 ; | |
yPosOfWm = wmHeight / 2; | |
break; | |
case ImagePosition .RightTop : | |
xPosOfWm = phWidth - wmWidth - 10; | |
yPosOfWm = wmHeight; | |
break ; | |
case ImagePosition .RigthBottom : | |
xPosOfWm = phWidth - wmWidth - 10; | |
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.Replace(PicturePath, ""); | |
} | |
} | |
/// <summary> | |
/// 装载水印图片的相关信息 | |
/// </summary> | |
public class WaterImage | |
{ | |
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; } | |
} | |
} |