/// <summary>
/// 单个水印操作
/// </summary>
/// <param name="waterMark"></param>
/// <param name="backgroundImgName"></param>
/// <param name="index"></param>
private static void DivWaterMark(WaterMark waterMark, string backgroundImgName, int index = 0)
{
#region 必须参数获取
//图片路径
var filePath = AppDomain.CurrentDomain.BaseDirectory + @"\Pictures\" + backgroundImgName;
//文件名
string fileName = Path.GetFileNameWithoutExtension(filePath);
//图片所处目录
string dirPath = Path.GetDirectoryName(filePath);
//存放目录
string savePath = dirPath + "\\ProductWaterMark";
//是否存在，不存在就创建
if (!Directory.Exists(savePath))
{
Directory.CreateDirectory(savePath);
}
#endregion
#region 水印操作
Image successImage = WaterMarkHelper.SetWaterMark(filePath, waterMark);
if (successImage != null)
{
//保存图片（不管打不打开都保存）
successImage.Save(savePath + "\\" + index + ".png", System.Drawing.Imaging.ImageFormat.Png);
}
else
{
Console.WriteLine("水印失败！请检查原图和水印图！");
}
#endregion
}
/// <summary>
/// 图片水印预设
/// </summary>
/// <returns></returns>
private static WaterMark WaterMarkImage(string filePath, int type)
{
WaterMarkLocationEnum location;
switch (type)
{
case (int)QrCodeType.WechatCard:
location = WaterMarkLocationEnum.CenterCenter;
break;
case (int)QrCodeType.Colllection:
location = WaterMarkLocationEnum.AdJust;
break;
default:
location = WaterMarkLocationEnum.CenterCenter;
break;
}
var waterMark = new WaterMark
{
WaterMarkType = WaterMarkTypeEnum.Image,
ImgPath = filePath,
WaterMarkLocation = location,
Transparency = 1f
};
return(waterMark);
}
/// <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;
case WaterMarkLocationEnum.AdJust:
x = imgSource.Width / 2 - markImg.Width / 2;
y = imgSource.Height / 2 - markImg.Height / 5;
break;
}
}
/// <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);
}
/// <summary>
/// 图片水印预设
/// </summary>
/// <returns></returns>
private static WaterMark WaterMarkImage(string filePath)
{
var waterMark = new WaterMark
{
WaterMarkType = WaterMarkTypeEnum.Image,
ImgPath = filePath,
WaterMarkLocation = WaterMarkLocationEnum.CenterCenter,
Transparency = 1f
};
return(waterMark);
}
/// <summary>
/// 水印文字预设
/// </summary>
/// <returns></returns>
private static WaterMark WaterMarkFont()
{
var waterMark = new WaterMark
{
WaterMarkType = WaterMarkTypeEnum.Text,
Transparency = 0.7f,
Text = "dunitian.cnblogs.com",
FontStyle = System.Drawing.FontStyle.Bold,
FontFamily = "Consolas",
FontSize = 20f,
BrushesColor = System.Drawing.Brushes.Black,
WaterMarkLocation = WaterMarkLocationEnum.CenterCenter
};
return(waterMark);
}
/// <summary>
/// 设置水印
/// </summary>
/// <param name="imgPath"></param>
/// <param name="model"></param>
/// <returns></returns>
public static Image SetWaterMark(string imgPath, WaterMark model)
{
//获取背景图
Image imgSource = Image.FromFile(imgPath);
//获取水印图片
Image markImg = 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);
}
//看看原图是否存在
if (!System.IO.File.Exists(imgPath))
{
return(null);
}
//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
{
//获得水印图像
markImg = Image.FromFile(model.ImgPath);
}
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
}
