C#添加水印
using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Drawing;
using System.IO;
using System.Drawing.Imaging;
/// <summary>
///ImgWater 的摘要说明
/// </summary>
public class ImgWater
{
public ImgWater()
{
//
//TODO: 在此处添加构造函数逻辑
//
}
/// <summary>
/// 图片水印
/// </summary>
/// <param name="ImgFile">原图文件地址</param>
/// <param name="WaterImg">水印图片地址</param>
/// <param name="sImgPath">水印图片保存地址</param>
/// <param name="Alpha">水印透明度设置</param>
/// <param name="iScale">水印图片在原图上的显示比例</param>
/// <param name="intDistance">水印图片在原图上的边距确定,以图片的右边和下边为准,当设定的边距超过一定大小后参数会自动失效</param>
public bool zzsImgWater(string ImgFile,string WaterImg,string sImgPath,
float Alpha, float iScale,int intDistance)
{
try
{
//装载图片
FileStream fs = new FileStream(ImgFile, FileMode.Open);
BinaryReader br = new BinaryReader(fs);
byte[] bytes = br.ReadBytes((int)fs.Length);
br.Close();
fs.Close();
MemoryStream ms = new MemoryStream(bytes);
System.Drawing.Image imgPhoto = System.Drawing.Image.FromStream(ms);
//System.Drawing.Image imgPhoto = System.Drawing.Image.FromFile(ImgFile);
int imgPhotoWidth = imgPhoto.Width;
int imgPhotoHeight = imgPhoto.Height;
System.Drawing.Image imgWatermark = new Bitmap(WaterImg);
int imgWatermarkWidth = imgWatermark.Width;
int imgWatermarkHeight = imgWatermark.Height;
//计算水印图片尺寸
decimal aScale = Convert.ToDecimal(iScale);
decimal pScale = 0.05M;
decimal MinScale = aScale - pScale;
decimal MaxScale = aScale + pScale;
int imgWatermarkWidthNew = imgWatermarkWidth;
int imgWatermarkHeightNew = imgWatermarkHeight;
if (imgPhotoWidth >= imgWatermarkWidth && imgPhotoHeight >= imgWatermarkHeight && imgPhotoWidth >= imgPhotoHeight)
if (imgWatermarkWidth > imgWatermarkHeight)
)) && (Math.Round((Convert.ToDecimal(imgWatermarkWidth) / Convert.ToDecimal(imgPhotoWidth)), ) <= MaxScale))
{
}
else
{
imgWatermarkWidthNew = Convert.ToInt32(imgPhotoWidth * aScale);
imgWatermarkHeightNew = Convert.ToInt32((imgPhotoWidth * aScale / imgWatermarkWidth) * imgWatermarkHeight);
}
else
)) && (Math.Round((Convert.ToDecimal(imgWatermarkHeight) / Convert.ToDecimal(imgPhotoHeight)), ) <= MaxScale))
{
}
else
{
imgWatermarkHeightNew = Convert.ToInt32(imgPhotoHeight * aScale);
imgWatermarkWidthNew = Convert.ToInt32((imgPhotoHeight * aScale / imgWatermarkHeight) * imgWatermarkWidth);
}
if (imgWatermarkWidth >= imgPhotoWidth && imgWatermarkHeight >= imgPhotoHeight && imgWatermarkWidth >= imgWatermarkHeight)
{
imgWatermarkWidthNew = Convert.ToInt32(imgPhotoWidth * aScale);
imgWatermarkHeightNew = Convert.ToInt32(((imgPhotoWidth * aScale) / imgWatermarkWidth) * imgWatermarkHeight);
}
if (imgWatermarkWidth >= imgPhotoWidth && imgWatermarkHeight <= imgPhotoHeight && imgPhotoWidth >= imgPhotoHeight)
{
imgWatermarkWidthNew = Convert.ToInt32(imgPhotoWidth * aScale);
imgWatermarkHeightNew = Convert.ToInt32(((imgPhotoWidth * aScale) / imgWatermarkWidth) * imgWatermarkHeight);
}
if (imgWatermarkWidth <= imgPhotoWidth && imgWatermarkHeight >= imgPhotoHeight && imgPhotoWidth >= imgPhotoHeight)
{
imgWatermarkHeightNew = Convert.ToInt32(imgPhotoHeight * aScale);
imgWatermarkWidthNew = Convert.ToInt32(((imgPhotoHeight * aScale) / imgWatermarkHeight) * imgWatermarkWidth);
}
if (imgPhotoWidth >= imgWatermarkWidth && imgPhotoHeight >= imgWatermarkHeight && imgPhotoWidth <= imgPhotoHeight)
if (imgWatermarkWidth > imgWatermarkHeight)
)) && (Math.Round((Convert.ToDecimal(imgWatermarkWidth) / Convert.ToDecimal(imgPhotoWidth)), ) <= MaxScale))
{
}
else
{
imgWatermarkWidthNew = Convert.ToInt32(imgPhotoWidth * aScale);
imgWatermarkHeightNew = Convert.ToInt32(((imgPhotoWidth * aScale) / imgWatermarkWidth) * imgWatermarkHeight);
}
else
)) && (Math.Round((Convert.ToDecimal(imgWatermarkHeight) / Convert.ToDecimal(imgPhotoHeight)), ) <= MaxScale))
{
}
else
{
imgWatermarkHeightNew = Convert.ToInt32(imgPhotoHeight * aScale);
imgWatermarkWidthNew = Convert.ToInt32(((imgPhotoHeight * aScale) / imgWatermarkHeight) * imgWatermarkWidth);
}
if (imgWatermarkWidth >= imgPhotoWidth && imgWatermarkHeight >= imgPhotoHeight && imgWatermarkWidth <= imgWatermarkHeight)
{
imgWatermarkHeightNew = Convert.ToInt32(imgPhotoHeight * aScale);
imgWatermarkWidthNew = Convert.ToInt32(((imgPhotoHeight * aScale) / imgWatermarkHeight) * imgWatermarkWidth);
}
if (imgWatermarkWidth >= imgPhotoWidth && imgWatermarkHeight <= imgPhotoHeight && imgPhotoWidth <= imgPhotoHeight)
{
imgWatermarkWidthNew = Convert.ToInt32(imgPhotoWidth * aScale);
imgWatermarkHeightNew = Convert.ToInt32(((imgPhotoWidth * aScale) / imgWatermarkWidth) * imgWatermarkHeight);
}
if (imgWatermarkWidth <= imgPhotoWidth && imgWatermarkHeight >= imgPhotoHeight && imgPhotoWidth <= imgPhotoHeight)
{
imgWatermarkHeightNew = Convert.ToInt32(imgPhotoHeight * aScale);
imgWatermarkWidthNew = Convert.ToInt32(((imgPhotoHeight * aScale) / imgWatermarkHeight) * imgWatermarkWidth);
}
//将原图画出来
Bitmap bmPhoto = new Bitmap(imgPhotoWidth, imgPhotoHeight, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
bmPhoto.SetResolution(, );
Graphics gbmPhoto = Graphics.FromImage(bmPhoto);
gbmPhoto.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
gbmPhoto.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
gbmPhoto.Clear(Color.White);
gbmPhoto.DrawImage(
imgPhoto
, , , imgPhotoWidth, imgPhotoHeight)
,
,
, imgPhotoWidth
, imgPhotoHeight
, GraphicsUnit.Pixel
);
Bitmap bmWatermark = new Bitmap(bmPhoto);
bmWatermark.SetResolution(imgPhoto.HorizontalResolution, imgPhoto.VerticalResolution);
Graphics gWatermark = Graphics.FromImage(bmWatermark);
//指定高质量显示水印图片质量
gWatermark.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
gWatermark.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
ImageAttributes imageAttributes = new ImageAttributes();
//设置两种颜色,达到合成效果
ColorMap colorMap = new ColorMap();
colorMap.OldColor = Color.FromArgb(, , , );
colorMap.NewColor = Color.FromArgb(, , , );
ColorMap[] remapTable = { colorMap };
imageAttributes.SetRemapTable(remapTable, System.Drawing.Imaging.ColorAdjustType.Bitmap);
//用矩阵设置水印图片透明度
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, Alpha, 0.0f},
new float[] {0.0f, 0.0f, 0.0f, 0.0f, 1.0f}
};
System.Drawing.Imaging.ColorMatrix wmColorMatrix = new System.Drawing.Imaging.ColorMatrix(colorMatrixElements);
imageAttributes.SetColorMatrix(wmColorMatrix, System.Drawing.Imaging.ColorMatrixFlag.Default, System.Drawing.Imaging.ColorAdjustType.Bitmap);
//确定水印边距
int xPos = imgPhotoWidth - imgWatermarkWidthNew;
int yPos = imgPhotoHeight - imgWatermarkHeightNew;
;
;
if (xPos > intDistance)
xPosOfWm = xPos - intDistance;
else
xPosOfWm = xPos;
if (yPos > intDistance)
yPosOfWm = yPos - intDistance;
else
yPosOfWm = yPos;
gWatermark.DrawImage(
imgWatermark
, new Rectangle(xPosOfWm, yPosOfWm, imgWatermarkWidthNew, imgWatermarkHeightNew)
,
,
, imgWatermarkWidth
, imgWatermarkHeight
, GraphicsUnit.Pixel
, imageAttributes
);
imgPhoto = bmWatermark;
//以jpg格式保存图片
imgPhoto.Save(sImgPath, System.Drawing.Imaging.ImageFormat.Jpeg);
//销毁对象
gbmPhoto.Dispose();
gWatermark.Dispose();
imgPhoto.Dispose();
imgWatermark.Dispose();
return true;
}
catch
{
return false;
}
}
/**//// <summary>
/// 文字水印
/// </summary>
/// <param name="ImgFile">原图文件地址</param>
/// <param name="TextFont">水印文字</param>
/// <param name="sImgPath">文字水印图片保存地址</param>
/// <param name="hScale">高度位置</param>
/// <param name="widthFont">文字块在图片中所占宽度比例</param>
/// <param name="Alpha">文字透明度 其数值的范围在0到255</param>
public bool zzsTextWater(
string ImgFile
, string TextFont
, string sImgPath
, float hScale
, float widthFont
, int Alpha
)
{
try
{
FileStream fs = new FileStream(ImgFile, FileMode.Open);
BinaryReader br = new BinaryReader(fs);
byte[] bytes = br.ReadBytes((int)fs.Length);
br.Close();
fs.Close();
MemoryStream ms = new MemoryStream(bytes);
System.Drawing.Image imgPhoto = System.Drawing.Image.FromStream(ms);
//System.Drawing.Image imgPhoto = System.Drawing.Image.FromFile(ImgFile);
int imgPhotoWidth = imgPhoto.Width;
int imgPhotoHeight = imgPhoto.Height;
Bitmap bmPhoto = new Bitmap(imgPhotoWidth, imgPhotoHeight, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
bmPhoto.SetResolution(, );
Graphics gbmPhoto = Graphics.FromImage(bmPhoto);
gbmPhoto.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
gbmPhoto.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
gbmPhoto.DrawImage(
imgPhoto
, , , imgPhotoWidth, imgPhotoHeight)
,
,
, imgPhotoWidth
, imgPhotoHeight
, GraphicsUnit.Pixel
);
//建立字体大小的数组,循环找出适合图片的水印字体
//int[] sizes = new int[] { 1000, 800, 700, 650, 600, 560, 540, 500, 450, 400, 380, 360, 340, 320, 300, 280, 260, 240, 220, 200, 180, 160, 140, 120, 100, 80, 72, 64, 48, 32, 28, 26, 24, 20, 28, 16, 14, 12, 10, 8, 6, 4, 2 };
, , , , , , };
System.Drawing.Font crFont = null;
System.Drawing.SizeF crSize = new SizeF();
; i < ; i++)
{
crFont = new Font("微软雅黑", sizes[i], FontStyle.Bold);
crSize = gbmPhoto.MeasureString(TextFont, crFont);
if ((ushort)crSize.Width < (ushort)imgPhotoWidth * widthFont)
break;
}
//设置水印字体的位置
//int yPixlesFromBottom = (int)(imgPhotoHeight * hScale);
//float yPosFromBottom = ((imgPhotoHeight - yPixlesFromBottom) - (crSize.Height / 2));
//float xCenterOfImg = (imgPhotoWidth * 1 / 2);
float yPosFromBottom = imgPhotoHeight * 0.85f;
float xCenterOfImg = imgPhotoWidth * 0.8f;
//if (xCenterOfImg<crSize.Height)
// xCenterOfImg = (imgPhotoWidth * (1 - (crSize.Height)/ imgPhotoWidth));
System.Drawing.StringFormat StrFormat = new System.Drawing.StringFormat();
StrFormat.Alignment = System.Drawing.StringAlignment.Center;
//
System.Drawing.SolidBrush semiTransBrush2 = , , ));
gbmPhoto.DrawString(
TextFont
, crFont
, semiTransBrush2
, , yPosFromBottom + )
, StrFormat
);
System.Drawing.SolidBrush semiTransBrush = , , ));
//gbmPhoto.FillRectangle(semiTransBrush2, new RectangleF(new PointF(xCenterOfImg - crSize.Width / 2, yPosFromBottom - 4), crSize));
gbmPhoto.DrawString(
TextFont
, crFont
, semiTransBrush
, new System.Drawing.PointF(xCenterOfImg, yPosFromBottom)
, StrFormat
);
bmPhoto.Save(sImgPath, System.Drawing.Imaging.ImageFormat.Jpeg);
gbmPhoto.Dispose();
imgPhoto.Dispose();
bmPhoto.Dispose();
return true;
}
catch(Exception ex)
{
return false;
}
}
/**//// <summary>
/// 文字和Logo图片水印
/// </summary>
/// <param name="ImgFile">原图文件地址</param>
/// <param name="WaterImg">水印图片地址</param>
/// <param name="TextFont">水印文字信息</param>
/// <param name="sImgPath">生存水印图片后的保存地址</param>
/// <param name="ImgAlpha">水印图片的透明度</param>
/// <param name="imgiScale">水印图片在原图上的显示比例</param>
/// <param name="intimgDistance">水印图片在原图上的边距确定,以图片的右边和下边为准,当设定的边距超过一定大小后参数会自动失效</param>
/// <param name="texthScale">水印文字高度位置,从图片底部开始计算，0－1</param>
/// <param name="textwidthFont">文字块在图片中所占宽度比例 0－1</param>
/// <param name="textAlpha">文字透明度 其数值的范围在0到255</param>
public void zzsImgTextWater(
string ImgFile
, string WaterImg
, string TextFont
, string sImgPath
, float ImgAlpha
, float imgiScale
, int intimgDistance
, float texthScale
, float textwidthFont
, int textAlpha
)
{
try
{
FileStream fs = new FileStream(ImgFile, FileMode.Open);
BinaryReader br = new BinaryReader(fs);
byte[] bytes = br.ReadBytes((int)fs.Length);
br.Close();
fs.Close();
MemoryStream ms = new MemoryStream(bytes);
System.Drawing.Image imgPhoto = System.Drawing.Image.FromStream(ms);
//System.Drawing.Image imgPhoto = System.Drawing.Image.FromFile(ImgFile);
int imgPhotoWidth = imgPhoto.Width;
int imgPhotoHeight = imgPhoto.Height;
Bitmap bmPhoto = new Bitmap(imgPhotoWidth, imgPhotoHeight, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
bmPhoto.SetResolution(, );
Graphics gbmPhoto = Graphics.FromImage(bmPhoto);
gbmPhoto.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
gbmPhoto.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
gbmPhoto.DrawImage(
imgPhoto
, , , imgPhotoWidth, imgPhotoHeight)
,
,
, imgPhotoWidth
, imgPhotoHeight
, GraphicsUnit.Pixel
);
//建立字体大小的数组,循环找出适合图片的水印字体
, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , };
System.Drawing.Font crFont = null;
System.Drawing.SizeF crSize = new SizeF();
; i < ; i++)
{
crFont = new Font("arial", sizes[i], FontStyle.Bold);
crSize = gbmPhoto.MeasureString(TextFont, crFont);
if ((ushort)crSize.Width < (ushort)imgPhotoWidth * textwidthFont)
break;
}
//设置水印字体的位置
int yPixlesFromBottom = (int)(imgPhotoHeight * texthScale);
));
/ );
System.Drawing.StringFormat StrFormat = new System.Drawing.StringFormat();
StrFormat.Alignment = System.Drawing.StringAlignment.Center;
//
System.Drawing.SolidBrush semiTransBrush2 = , , ));
gbmPhoto.DrawString(
TextFont
, crFont
, semiTransBrush2
, , yPosFromBottom + )
, StrFormat
);
System.Drawing.SolidBrush semiTransBrush = , , ));
gbmPhoto.DrawString(
TextFont
, crFont
, semiTransBrush
, new System.Drawing.PointF(xCenterOfImg, yPosFromBottom)
, StrFormat
);
System.Drawing.Image imgWatermark = new Bitmap(WaterImg);
int imgWatermarkWidth = imgWatermark.Width;
int imgWatermarkHeight = imgWatermark.Height;
//计算水印图片尺寸
decimal aScale = Convert.ToDecimal(imgiScale);
decimal pScale = 0.05M;
decimal MinScale = aScale - pScale;
decimal MaxScale = aScale + pScale;
int imgWatermarkWidthNew = imgWatermarkWidth;
int imgWatermarkHeightNew = imgWatermarkHeight;
if (imgPhotoWidth >= imgWatermarkWidth && imgPhotoHeight >= imgWatermarkHeight && imgPhotoWidth >= imgPhotoHeight)
if (imgWatermarkWidth > imgWatermarkHeight)
)) && (Math.Round((Convert.ToDecimal(imgWatermarkWidth) / Convert.ToDecimal(imgPhotoWidth)), ) <= MaxScale))
{
}
else
{
imgWatermarkWidthNew = Convert.ToInt32(imgPhotoWidth * aScale);
imgWatermarkHeightNew = Convert.ToInt32((imgPhotoWidth * aScale / imgWatermarkWidth) * imgWatermarkHeight);
}
else
)) && (Math.Round((Convert.ToDecimal(imgWatermarkHeight) / Convert.ToDecimal(imgPhotoHeight)), ) <= MaxScale))
{
}
else
{
imgWatermarkHeightNew = Convert.ToInt32(imgPhotoHeight * aScale);
imgWatermarkWidthNew = Convert.ToInt32((imgPhotoHeight * aScale / imgWatermarkHeight) * imgWatermarkWidth);
}
if (imgWatermarkWidth >= imgPhotoWidth && imgWatermarkHeight >= imgPhotoHeight && imgWatermarkWidth >= imgWatermarkHeight)
{
imgWatermarkWidthNew = Convert.ToInt32(imgPhotoWidth * aScale);
imgWatermarkHeightNew = Convert.ToInt32(((imgPhotoWidth * aScale) / imgWatermarkWidth) * imgWatermarkHeight);
}
if (imgWatermarkWidth >= imgPhotoWidth && imgWatermarkHeight <= imgPhotoHeight && imgPhotoWidth >= imgPhotoHeight)
{
imgWatermarkWidthNew = Convert.ToInt32(imgPhotoWidth * aScale);
imgWatermarkHeightNew = Convert.ToInt32(((imgPhotoWidth * aScale) / imgWatermarkWidth) * imgWatermarkHeight);
}
if (imgWatermarkWidth <= imgPhotoWidth && imgWatermarkHeight >= imgPhotoHeight && imgPhotoWidth >= imgPhotoHeight)
{
imgWatermarkHeightNew = Convert.ToInt32(imgPhotoHeight * aScale);
imgWatermarkWidthNew = Convert.ToInt32(((imgPhotoHeight * aScale) / imgWatermarkHeight) * imgWatermarkWidth);
}
if (imgPhotoWidth >= imgWatermarkWidth && imgPhotoHeight >= imgWatermarkHeight && imgPhotoWidth <= imgPhotoHeight)
if (imgWatermarkWidth > imgWatermarkHeight)
)) && (Math.Round((Convert.ToDecimal(imgWatermarkWidth) / Convert.ToDecimal(imgPhotoWidth)), ) <= MaxScale))
{
}
else
{
imgWatermarkWidthNew = Convert.ToInt32(imgPhotoWidth * aScale);
imgWatermarkHeightNew = Convert.ToInt32(((imgPhotoWidth * aScale) / imgWatermarkWidth) * imgWatermarkHeight);
}
else
)) && (Math.Round((Convert.ToDecimal(imgWatermarkHeight) / Convert.ToDecimal(imgPhotoHeight)), ) <= MaxScale))
{
}
else
{
imgWatermarkHeightNew = Convert.ToInt32(imgPhotoHeight * aScale);
imgWatermarkWidthNew = Convert.ToInt32(((imgPhotoHeight * aScale) / imgWatermarkHeight) * imgWatermarkWidth);
}
if (imgWatermarkWidth >= imgPhotoWidth && imgWatermarkHeight >= imgPhotoHeight && imgWatermarkWidth <= imgWatermarkHeight)
{
imgWatermarkHeightNew = Convert.ToInt32(imgPhotoHeight * aScale);
imgWatermarkWidthNew = Convert.ToInt32(((imgPhotoHeight * aScale) / imgWatermarkHeight) * imgWatermarkWidth);
}
if (imgWatermarkWidth >= imgPhotoWidth && imgWatermarkHeight <= imgPhotoHeight && imgPhotoWidth <= imgPhotoHeight)
{
imgWatermarkWidthNew = Convert.ToInt32(imgPhotoWidth * aScale);
imgWatermarkHeightNew = Convert.ToInt32(((imgPhotoWidth * aScale) / imgWatermarkWidth) * imgWatermarkHeight);
}
if (imgWatermarkWidth <= imgPhotoWidth && imgWatermarkHeight >= imgPhotoHeight && imgPhotoWidth <= imgPhotoHeight)
{
imgWatermarkHeightNew = Convert.ToInt32(imgPhotoHeight * aScale);
imgWatermarkWidthNew = Convert.ToInt32(((imgPhotoHeight * aScale) / imgWatermarkHeight) * imgWatermarkWidth);
}
//将原图画出来
Bitmap bmWatermark = new Bitmap(bmPhoto);
bmWatermark.SetResolution(imgPhoto.HorizontalResolution, imgPhoto.VerticalResolution);
Graphics gWatermark = Graphics.FromImage(bmWatermark);
//指定高质量显示水印图片质量
gWatermark.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
gWatermark.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
System.Drawing.Imaging.ImageAttributes imageAttributes = new System.Drawing.Imaging.ImageAttributes();
//设置两种颜色,达到合成效果
System.Drawing.Imaging.ColorMap colorMap = new System.Drawing.Imaging.ColorMap();
colorMap.OldColor = Color.FromArgb(, , , );
colorMap.NewColor = Color.FromArgb(, , , );
System.Drawing.Imaging.ColorMap[] remapTable = { colorMap };
imageAttributes.SetRemapTable(remapTable, System.Drawing.Imaging.ColorAdjustType.Bitmap);
//用矩阵设置水印图片透明度
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, ImgAlpha, 0.0f},
new float[] {0.0f, 0.0f, 0.0f, 0.0f, 1.0f}
};
System.Drawing.Imaging.ColorMatrix wmColorMatrix = new System.Drawing.Imaging.ColorMatrix(colorMatrixElements);
imageAttributes.SetColorMatrix(wmColorMatrix, System.Drawing.Imaging.ColorMatrixFlag.Default, System.Drawing.Imaging.ColorAdjustType.Bitmap);
//确定水印边距
int xPos = imgPhotoWidth - imgWatermarkWidthNew;
int yPos = imgPhotoHeight - imgWatermarkHeightNew;
;
;
if (xPos > intimgDistance)
xPosOfWm = xPos - intimgDistance;
else
xPosOfWm = xPos;
if (yPos > intimgDistance)
yPosOfWm = yPos - intimgDistance;
else
yPosOfWm = yPos;
gWatermark.DrawImage(
imgWatermark
, new Rectangle(xPosOfWm, yPosOfWm, imgWatermarkWidthNew, imgWatermarkHeightNew)
,
,
, imgWatermarkWidth
, imgWatermarkHeight
, GraphicsUnit.Pixel
, imageAttributes
);
imgPhoto = bmWatermark;
//以jpg格式保存图片
imgPhoto.Save(sImgPath, System.Drawing.Imaging.ImageFormat.Jpeg);
//销毁对象
gbmPhoto.Dispose();
gWatermark.Dispose();
bmPhoto.Dispose();
imgPhoto.Dispose();
imgWatermark.Dispose();
}
catch
{
}
}
/**//// <summary>
/// 缩略图
/// </summary>
/// <param name="ImgFile">原图文件地址</param>
/// <param name="sImgPath">缩略图保存地址</param>
/// <param name="ResizeWidth">缩略图宽度</param>
/// <param name="ResizeHeight">缩略图高度</param>
/// <param name="BgColor">缩略图背景颜色,注意,背景颜色只能指定KnownColor中的值,如blue,red,green等</param>
public bool zzsResizeImg(string ImgFile, string sImgPath, int ResizeWidth, int ResizeHeight, string BgColor)
{
try
{
FileStream fs = new FileStream(ImgFile, FileMode.Open);
BinaryReader br = new BinaryReader(fs);
byte[] bytes = br.ReadBytes((int)fs.Length);
br.Close();
fs.Close();
MemoryStream ms = new MemoryStream(bytes);
System.Drawing.Image imgPhoto = System.Drawing.Image.FromStream(ms);
//System.Drawing.Image imgPhoto = System.Drawing.Image.FromFile(ImgFile);
int imgPhotoWidth = imgPhoto.Width;
int imgPhotoHeight = imgPhoto.Height;
;
;
;
;
if (imgPhotoWidth >= ResizeWidth && imgPhotoHeight >= ResizeHeight)
{
NewWidth = ResizeWidth;
NewHeight = Convert.ToInt32(imgPhotoHeight * Math.Round(Convert.ToDecimal(ResizeWidth) / Convert.ToDecimal(imgPhotoWidth), ));
startX = ;
StartY = (ResizeHeight - NewHeight) / ;
}
if (ResizeWidth > imgPhotoWidth && ResizeHeight < imgPhotoHeight)
{
NewHeight = ResizeHeight;
NewWidth = Convert.ToInt32(imgPhotoWidth * Math.Round(Convert.ToDecimal(ResizeHeight) / Convert.ToDecimal(imgPhotoHeight), ));
startX = (ResizeWidth - NewWidth) / ;
StartY = ;
}
if (ResizeWidth < imgPhotoWidth && ResizeHeight > imgPhotoHeight)
{
NewWidth = ResizeWidth;
NewHeight = Convert.ToInt32(imgPhotoHeight * Math.Round(Convert.ToDecimal(ResizeWidth) / Convert.ToDecimal(imgPhotoWidth), ));
startX = ;
StartY = (ResizeHeight - NewHeight) / ;
}
if (imgPhotoWidth < ResizeWidth && imgPhotoHeight < ResizeHeight)
{
NewWidth = imgPhotoWidth;
NewHeight = imgPhotoHeight;
startX = (ResizeWidth - imgPhotoWidth) / ;
StartY = (ResizeHeight - imgPhotoHeight) / ;
}
//计算缩放图片尺寸
Bitmap bmPhoto = new Bitmap(ResizeWidth, ResizeHeight, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
bmPhoto.SetResolution(, );
Graphics gbmPhoto = Graphics.FromImage(bmPhoto);
gbmPhoto.Clear(Color.FromName(BgColor));
gbmPhoto.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
gbmPhoto.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
gbmPhoto.DrawImage(
imgPhoto
, new Rectangle(startX, StartY, NewWidth, NewHeight)
, , , imgPhotoWidth, imgPhotoHeight)
, GraphicsUnit.Pixel
);
bmPhoto.Save(sImgPath, System.Drawing.Imaging.ImageFormat.Jpeg);
imgPhoto.Dispose();
gbmPhoto.Dispose();
bmPhoto.Dispose();
ms.Close();
return true;
}
catch
{
return false;
}
}
/**//// <summary>
/// 图片剪切
/// </summary>
/// <param name="ImgFile">原图文件地址</param>
/// <param name="sImgPath">缩略图保存地址</param>
/// <param name="PointX">剪切起始点 X坐标</param>
/// <param name="PointY">剪切起始点 Y坐标</param>
/// <param name="CutWidth">剪切宽度</param>
/// <param name="CutHeight">剪切高度</param>
public bool zzsCutImg(string ImgFile, string sImgPath, int PointX, int PointY, int CutWidth, int CutHeight)
{
FileStream fs = new FileStream(ImgFile, FileMode.Open);
BinaryReader br = new BinaryReader(fs);
try
{
byte[] bytes = br.ReadBytes((int)fs.Length);
br.Close();
fs.Close();
MemoryStream ms = new MemoryStream(bytes);
System.Drawing.Image imgPhoto = System.Drawing.Image.FromStream(ms);
//System.Drawing.Image imgPhoto = System.Drawing.Image.FromFile(ImgFile);
//此处只能用filestream，用 System.Drawing.Image则会报多过进程访问文件的错误，会锁定文件
Bitmap bmPhoto = new Bitmap(CutWidth, CutHeight, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
bmPhoto.SetResolution(, );
Graphics gbmPhoto = Graphics.FromImage(bmPhoto);
gbmPhoto.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
gbmPhoto.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
gbmPhoto.DrawImage(
imgPhoto
, , , CutWidth, CutHeight)
, new Rectangle(PointX, PointY, CutHeight, CutHeight)
, GraphicsUnit.Pixel
);
bmPhoto.Save(sImgPath, System.Drawing.Imaging.ImageFormat.Jpeg);
imgPhoto.Dispose();
gbmPhoto.Dispose();
bmPhoto.Dispose();
ms.Close();
return true;
}
catch
{
return false;
}
finally
{
}
}
}
public partial class WebForm1 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
ImgWater img = new ImgWater();
bool f = img.zzsTextWater(@"F:\ConsoleApplication1\LOGO.png",
"水印测试", @"F:\LOGO.png",15.00F,0.25F,100);
}
}
C#添加水印的更多相关文章
- PHP-生成缩略图和添加水印图-学习笔记
1.开始 在网站上传图片过程,经常用到缩略图功能.这里我自己写了一个图片处理的Image类,能生成缩略图,并且可以添加水印图. 2.如何生成缩略图 生成缩略图,关键的是如何计算缩放比率. 这里,我根据 ...
- C#中如何给Excel添加水印
我们知道Microsoft Excel并没有内置的功能直接给Excel表添加水印,但是其实我们可以用其他变通的方式来解决此问题,如通过添加页眉图片或艺术字的方法来模仿水印的外观.所以在这篇文章中,我将 ...
- C# 给word文档添加水印
和PDF一样,在word中,水印也分为图片水印和文本水印,给文档添加图片水印可以使文档变得更为美观,更具有吸引力.文本水印则可以保护文档,提醒别人该文档是受版权保护的,不能随意抄袭.前面我分享了如何给 ...
- C# 给PDF文件添加水印
水印种类及功能介绍 PDF水印分为两种:文本水印和图片水印.文本水印一般被用在商业领域,提醒读者该文档是受版权保护的,其他人不能抄袭或者免费使用.除了这个特征,水印还可以用来标记这个文档 的一些基 ...
- C#基于两种需求向图片添加水印
使用场景 1.也就是大家经常用的,一般是图片的4个角落,基于横纵坐标来添加. 2.在图片内基于固定位置,文字始终居中.刚开始我基于第一种场景来根据水印汉字的长度来计算坐标,后来发现方法始终不可靠.现在 ...
- PHP 图片处理工具类（添加水印与生成缩略图）
=================ImageTool.class.php================= <?php class ImageTool { private $imagePath; ...
- ios 给图片添加水印
//第一种添加水印方法 -(UIImage *)watermarkImage:(UIImage *)img withName:(NSString *)name{ NSString* mark = na ...
- Android 图片添加水印图片或者文字
给图片添加水印的基本思路都是载入原图,添加文字或者载入水印图片,保存图片这三个部分 添加水印图片: ? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 ...
- iOS 学习 - 15.添加水印
绘制到位图 下面利用位图图形上下文给一个图片添加水印,在下面的程序中我们首先创建上下文,然后在上下文中绘制图片.直线和文本,最后从当前位图上下文中取得最终形成的新图片显示到界面 - (void)vie ...
- c#图片添加水印
今天讲一个上传图片添加水印的方法,直接上代码吧 protected void Button1_Click(object sender, EventArgs e) { int loc ...
随机推荐
- Python 面向对象 —— super 的使用（Python 2.x vs Python 3.x）
注意区分当前的 Python 版本是 2.X 还是 3.X,Python 3.X 在 super 的使用上较之 Python 2.X 有较大的变化: 1. Python 2.x class Conta ...
- SpringBoot与Dubbo的整合-zookeeper和监控中心搭建
对于Dubbo的应用已经是十分普遍,自从阿里巴巴开源以来,国内许多公司就采用了dubbo的架构来开发项目.不过再dubbo十分火的时候,突然就停止更新了, 只有当当网还在其基础进行了拓展(dubbox ...
- 43.安装npm及cnpm(Windows)
转自:https://www.cnblogs.com/yominhi/p/7039795.html [工具官网] Node.js : http://nodejs.cn/ 淘宝NPM: https:// ...
- js---- localStorage的基本用法
<body> <div> <span>用户名</span> <input type="text" class='usernam ...
- 关于obj.currentStyle.property、window.getComputedStyle(obj,null).property、obj.style.property的理解
首先是obj,style.property 我一直用这个obj.style.property这个属性来修改内联和外联的obj属性,但是从网上看到了obj.style.property居然只能读取内嵌的 ...
- LA 2531 The K-league 最大流
#include <iostream> #include <cstdio> #include <fstream> #include <algorithm> ...
- less---查看文件
- 今日SGU 5.1
SGU 100 题意: 普通的a+b #include<bits/stdc++.h> #define de(x) cout<<#x<<"="&l ...
- TOJ 2233 WTommy's Trouble
2233. WTommy's Trouble Time Limit: 2.0 Seconds Memory Limit: 65536KTotal Runs: 1499 Accepted R ...
- xml格式报文的拼装，和解析成实体类
我们的微信支付,使用的是第三方的支付,某银行的微信支持渠道.所有的接口请求.应答都是xml格式报文,这样就需要用到xml格式报文的拼装和解析,这儿简单讲一下. 拼接xml格式报文. 从页面表单提交和配 ...