//绘制文本水印
private static void DrawTxtWaterMark(ModelUploadFileConfig objConfig)
{
if (!File.Exists(objConfig.ServerFileFullPath))
{
objConfig.OPFlag = false;
objConfig.OPMessage = "文件不存在，加水印失败。";
return;
}
Image objImg = Image.FromFile(objConfig.ServerFileFullPath);
switch (objImg.PixelFormat)
{
case PixelFormat.Format1bppIndexed:
case PixelFormat.Format4bppIndexed:
case PixelFormat.Format8bppIndexed:
case PixelFormat.Undefined:
case PixelFormat.Format16bppArgb1555:
case PixelFormat.Format16bppGrayScale:
objConfig.OPFlag = false;
objConfig.OPMessage = "上传的图片包含不正确的像素格式，不能加水印！";
objImg.Dispose();
return;
default:
break;
}
Graphics g = null;
Font f = new Font("Verdana", 12f, FontStyle.Bold);
Brush b = new SolidBrush(Color.Red);
try
{
g = Graphics.FromImage(objImg);
g.DrawImage(objImg, 0, 0, objImg.Width, objImg.Height);
g.DrawString(objConfig.WaterMarkTxtString, f, b, Convert.ToSingle(objConfig.WaterMarkMarginRight), Convert.ToSingle(objConfig.WaterMarkMarginBottom));
objConfig.ServerFileHasWMFullPath = RenameFile(objConfig.ServerFileFullPath);
objImg.Save(objConfig.ServerFileHasWMFullPath);
objConfig.OPFlag = true;
}
catch (Exception ex)
{
throw ex;
}
finally
{
f.Dispose();
b.Dispose();
g.Dispose();
objImg.Dispose();
HelperFile.DeleteFile(objConfig.ServerFileHasWMFullPath);
}
}
//绘制图片水印
private static void DrawPicWaterMark(ModelUploadFileConfig objConfig)
{
if (!File.Exists(objConfig.ServerFileFullPath))
{
objConfig.OPFlag = false;
objConfig.OPMessage = "图片文件不存在，加水印失败。";
return;
}
string strRootPath = System.Web.HttpContext.Current.Request.PhysicalApplicationPath;
objConfig.WaterMarkImagePath = strRootPath + objConfig.WaterMarkImagePath;
if (!File.Exists(objConfig.WaterMarkImagePath))
{
objConfig.OPFlag = false;
objConfig.OPMessage = "水印图片文件不存在，加水印失败。";
return;
}
//将服务器端要加水印的图像文件载入到Image对象里
Image objImg = Image.FromFile(objConfig.ServerFileFullPath);
switch (objImg.PixelFormat)
{
case PixelFormat.Format1bppIndexed:
case PixelFormat.Format4bppIndexed:
case PixelFormat.Format8bppIndexed:
case PixelFormat.Undefined:
case PixelFormat.Format16bppArgb1555:
case PixelFormat.Format16bppGrayScale:
objConfig.OPFlag = false;
objConfig.OPMessage = "上传的图片包含不正确的像素格式，不能加水印。";
objImg.Dispose();
return;
}
//将水印图像文件载入到另一个Image对象里
Image objWMImg = Image.FromFile(objConfig.WaterMarkImagePath);
// 将保存了图像文件的Image对象存到一个Graphics对象里
Graphics g = Graphics.FromImage(objImg);
MemoryStream objMS = new MemoryStream();
ImageAttributes imgAttr = new ImageAttributes();
FileStream objFS = null;
try
{
//获取要绘制图形坐标
int x = objImg.Width - objConfig.WaterMarkMarginRight;
int y = objImg.Height - objConfig.WaterMarkMarginBottom;
//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,
Convert.ToSingle(objConfig.WaterMarkTransparent) / 100f,
0
},
new float[] {
0,
0,
0,
0,
1
}
};
ColorMatrix colorMatrix = new ColorMatrix(matrixItems);
imgAttr.SetColorMatrix(colorMatrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap);
g.SmoothingMode = SmoothingMode.AntiAlias;
//在Graphics对象里绘制水印图像，此时，和这个Graphics对象相关联的服务器文件也跟着被画上了水印
g.DrawImage(objWMImg, new Rectangle(x, y, objWMImg.Width, objWMImg.Height), 0, 0, objWMImg.Width, objWMImg.Height, GraphicsUnit.Pixel, imgAttr);
//读取原来服务器端要写入水印的文件的文件类型
FileInfo objFile = new FileInfo(objConfig.ServerFileFullPath);
ImageFormat imageType = default(ImageFormat);
switch (objFile.Extension.ToLower())
{
case ".jpg":
imageType = ImageFormat.Jpeg;
break;
case ".jpeg":
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:
imageType = ImageFormat.Jpeg;
break;
}
// 将已经画好水印的Image对象保存到内存流中
objImg.Save(objMS, imageType);
// 将内存流以数组形式保存到图像数组里
byte[] imgData = objMS.ToArray();
//将写了水印的图像数组存入改了名的文件
objFS = new FileStream(RenameFile(objConfig.ServerFileFullPath), FileMode.Create, FileAccess.Write);
if ((objFS != null))
{
objFS.Write(imgData, 0, imgData.Length);
}
objConfig.OPFlag = true;
objConfig.ServerFileHasWMFullPath = RenameFile(objConfig.ServerFileFullPath);
}
catch (Exception ex)
{
throw ex;
}
finally
{
objFS.Close();
objFS.Dispose();
objFS = null;
objImg.Dispose();
objImg = null;
objWMImg.Dispose();
objWMImg = null;
g.Dispose();
g = null;
objMS.Close();
objMS.Dispose();
objMS = null;
imgAttr.Dispose();
imgAttr = null;
HelperFile.DeleteFile(objConfig.ServerFileHasWMFullPath);
}
}