/// <summary>
/// 在图片上增加文字水印 系统默认方法 字体：Verdana，大小：20，颜色：Green
/// </summary>
/// <param name="sourcePath">The source path.</param>
/// <param name="newPath">The new path.</param>
/// <param name="letter">水印的文字</param>
/// <param name="positionType">图片水印位置:UL，UM ， UR ， ML ， MM ， MR ， BL ， BM ， BR ，CUSTORM 为自定义</param>
/// <returns></returns>
public static bool TextWatermark(string sourcePath, string newPath, string letter, PicWaterMarkPosition positionType)
{
System.Drawing.Font f = new System.Drawing.Font("Verdana", 20);
System.Drawing.Brush b = new System.Drawing.SolidBrush(System.Drawing.Color.Green);
return TextWatermark(sourcePath, newPath, letter, f, b, 0, 0, positionType);
}
/// <summary>
/// 在图片上增加文字水印
/// </summary>
/// <param name="Path">原服务器图片路径</param>
/// <param name="Path_sy">生成的带文字水印的图片路径</param>
/// <param name="letter">水印的文字</param>
/// <param name="font">字体及大小</param>
/// <param name="brush">画笔主要是颜色</param>
/// <param name="txtPositionX">坐标X</param>
/// <param name="txtPositionY">坐标Y</param>
/// <param name="positionTpye">图片水印位置:UL，UM ， UR ， ML ， MM ， MR ， BL ， BM ， BR ，CUSTORM 为自定义</param>
/// <returns></returns>
public static bool TextWatermark(string sourcePath, string newPath, string letter,
System.Drawing.Font font, System.Drawing.Brush brush, int txtPositionX, int txtPositionY,
PicWaterMarkPosition positionTpye)
{
string addText = letter;
try
{
System.Drawing.Image image = System.Drawing.Image.FromFile(sourcePath);
System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(image);
g.DrawImage(image, 0, 0, image.Width, image.Height);
System.Drawing.Font f = font;
System.Drawing.Brush b = brush;
switch (positionTpye)
{
case PicWaterMarkPosition.CUSTORM:
g.DrawString(addText, f, b, txtPositionX, txtPositionY);
break;
case PicWaterMarkPosition.UL:
g.DrawString(addText, f, b, 2, 2);
break;
case PicWaterMarkPosition.UM:
g.DrawString(addText, f, b, image.Width / 2 - (letter.Length * font.Size) / 4, 2);
break;
case PicWaterMarkPosition.UR:
g.DrawString(addText, f, b, image.Width - (float)letter.Length / 1.9f * font.Size, 2);
break;
case PicWaterMarkPosition.ML:
g.DrawString(addText, f, b, 2, image.Height / 2 - font.Height / 4);
break;
case PicWaterMarkPosition.MM:
g.DrawString(addText, f, b, image.Width / 2 - (letter.Length * font.Size) / 4, image.Height / 2 - font.Height / 4);
break;
case PicWaterMarkPosition.MR:
// x.r y.m
g.DrawString(addText, f, b, image.Width - (float)letter.Length / 1.9f * font.Size, image.Height / 2 - font.Height / 4);
break;
case PicWaterMarkPosition.BL:
//x.l y.b
g.DrawString(addText, f, b, 2, image.Height - font.Height / 1.3f);
break;
case PicWaterMarkPosition.BM:
// x.m y.b
g.DrawString(addText, f, b, image.Width / 2 - (letter.Length * font.Size) / 4, image.Height - font.Height / 1.3f);
break;
case PicWaterMarkPosition.BR:
//x.r y.b
g.DrawString(addText, f, b, image.Width - (float)letter.Length / 1.9f * font.Size, image.Height - font.Height / 1.3f);
break;
default:
break;
}
g.Dispose();
try
{
image.Save(newPath);
image.Dispose();
return true;
}
catch (Exception)
{
image.Dispose();
return false;
}
}
catch (Exception)
{
return false;
}
}
/// <summary>
/// 在图片上生成图片水印
/// </summary>
/// <param name="sourcePath">原图片路径</param>
/// <param name="targetPath">另存为路径</param>
/// <param name="waterMarkFilePath">水印图片路径</param>
/// <param name="positionType">图片水印位置:UL，UM ， UR ， ML ， MM ， MR ， BL ， BM ， BR ，CUSTORM 为自定义.</param>
/// <param name="quality">是否是高质量图片 取值范围0--100</param>
/// <param name="watermarkTransparency">图片水印透明度 取值范围1--10 (10为不透明)</param>
/// <returns></returns>
public static bool PictureWatermark(string sourcePath, string targetPath, string waterMarkFilePath, PicWaterMarkPosition positionType, int quality, int watermarkTransparency)
{
System.Drawing.Image img = System.Drawing.Image.FromFile(sourcePath);
System.Drawing.Bitmap outPut = new System.Drawing.Bitmap(img);
try
{
#region using
using (Graphics g = Graphics.FromImage(outPut))
{
//设置高质量插值法
//g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
//设置高质量,低速度呈现平滑程度
//g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
System.Drawing.Image markImg = new System.Drawing.Bitmap(waterMarkFilePath);
if (markImg.Height >= img.Height || markImg.Width >= img.Width)
{
return false;
}
System.Drawing.Imaging.ImageAttributes imageAttributes = new System.Drawing.Imaging.ImageAttributes();
System.Drawing.Imaging.ColorMap colorMap = new System.Drawing.Imaging.ColorMap();
colorMap.OldColor = System.Drawing.Color.FromArgb(255, 0, 255, 0);
colorMap.NewColor = System.Drawing.Color.FromArgb(0, 0, 0, 0);
System.Drawing.Imaging.ColorMap[] remapTable = { colorMap };
imageAttributes.SetRemapTable(remapTable, System.Drawing.Imaging.ColorAdjustType.Bitmap);
float transparency = 0.5F;
if (watermarkTransparency >= 1 && watermarkTransparency <= 10)
{
transparency = (watermarkTransparency / 10.0F);
}
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, transparency, 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;
#region position
switch (positionType)
{
case PicWaterMarkPosition.UL:
xpos = (int)(img.Width * (float).01);
ypos = (int)(img.Height * (float).01);
break;
case PicWaterMarkPosition.UM:
xpos = (int)((img.Width * (float).50) - (markImg.Width / 2));
ypos = (int)(img.Height * (float).01);
break;
case PicWaterMarkPosition.UR:
xpos = (int)((img.Width * (float).99) - (markImg.Width));
ypos = (int)(img.Height * (float).01);
break;
case PicWaterMarkPosition.ML:
xpos = (int)(img.Width * (float).01);
ypos = (int)((img.Height * (float).50) - (markImg.Height / 2));
break;
case PicWaterMarkPosition.MM:
xpos = (int)((img.Width * (float).50) - (markImg.Width / 2));
ypos = (int)((img.Height * (float).50) - (markImg.Height / 2));
break;
case PicWaterMarkPosition.MR:
xpos = (int)((img.Width * (float).99) - (markImg.Width));
ypos = (int)((img.Height * (float).50) - (markImg.Height / 2));
break;
case PicWaterMarkPosition.BL:
xpos = (int)(img.Width * (float).01);
ypos = (int)((img.Height * (float).99) - markImg.Height);
break;
case PicWaterMarkPosition.BM:
xpos = (int)((img.Width * (float).50) - (markImg.Width / 2));
ypos = (int)((img.Height * (float).99) - markImg.Height);
break;
case PicWaterMarkPosition.BR:
xpos = (int)((img.Width * (float).99) - (markImg.Width));
ypos = (int)((img.Height * (float).99) - markImg.Height);
break;
}
#endregion position
g.DrawImage(markImg, new System.Drawing.Rectangle(xpos, ypos, markImg.Width, markImg.Height), 0, 0, markImg.Width, markImg.Height, System.Drawing.GraphicsUnit.Pixel, imageAttributes);
System.Drawing.Imaging.ImageCodecInfo[] codecs = System.Drawing.Imaging.ImageCodecInfo.GetImageEncoders();
System.Drawing.Imaging.ImageCodecInfo ici = null;
foreach (System.Drawing.Imaging.ImageCodecInfo codec in codecs)
{
if (codec.MimeType.IndexOf("jpeg") > -1)
{
ici = codec;
}
}
System.Drawing.Imaging.EncoderParameters encoderParams = new System.Drawing.Imaging.EncoderParameters();
long[] qualityParam = new long[1];
if (quality < 0 || quality > 100)
{
quality = 80;
}
qualityParam[0] = quality;
System.Drawing.Imaging.EncoderParameter encoderParam = new System.Drawing.Imaging.EncoderParameter(System.Drawing.Imaging.Encoder.Quality, qualityParam);
encoderParams.Param[0] = encoderParam;
if (ici != null)
{
outPut.Save(targetPath, ici, encoderParams);
}
else
{
outPut.Save(targetPath);
}
g.Dispose();
markImg.Dispose();
imageAttributes.Dispose();
}
#endregion using
}
catch (Exception)
{
return false;
}
finally
{
if (outPut != null)
{
outPut.Dispose();
}
if (img != null)
{
img.Dispose();
}
}
return true;
}
