using System;
using System.Drawing;
using System.IO;
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/**//// <summary>
/// ImgEdit 的摘要说明
/// </summary>
public class ImgEdit
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{
public ImgEdit()
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{
//
// TODO: 在此处添加构造函数逻辑
//
}
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/**//// <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(水平)</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 ImgWater(string ImgFile, string WaterImg, string sImgPath, float Alpha, float iScale, int intDistance)
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{
try
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{
//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);
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System.Drawing.Image imgPhoto = System.Drawing.Image.FromStream(ms);
int imgPhotoWidth = imgPhoto.Width;
int imgPhotoHeight = imgPhoto.Height;
![](/Images/OutliningIndicators/InBlock.gif)
System.Drawing.Image imgWatermark = new Bitmap(WaterImg);
int imgWatermarkWidth = imgWatermark.Width;
int imgWatermarkHeight = imgWatermark.Height;
![](/Images/OutliningIndicators/InBlock.gif)
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//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;
![](/Images/OutliningIndicators/InBlock.gif)
//设置比例
int imgWatermarkWidthNew = Convert.ToInt32(imgPhotoWidth * aScale);
int imgWatermarkHeightNew = Convert.ToInt32((imgPhotoWidth * aScale / imgWatermarkWidth) * imgWatermarkHeight);
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//将原图画出来
Bitmap bmPhoto = new Bitmap(imgPhotoWidth, imgPhotoHeight, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
bmPhoto.SetResolution(72, 72);
Graphics gbmPhoto = Graphics.FromImage(bmPhoto);
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gbmPhoto.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
gbmPhoto.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
gbmPhoto.Clear(Color.White);
gbmPhoto.DrawImage(imgPhoto, new Rectangle(0, 0, imgPhotoWidth, imgPhotoHeight), 0, 0, imgPhotoWidth, imgPhotoHeight, GraphicsUnit.Pixel);
![](/Images/OutliningIndicators/InBlock.gif)
Bitmap bmWatermark = new Bitmap(bmPhoto);
bmWatermark.SetResolution(imgPhoto.HorizontalResolution, imgPhoto.VerticalResolution);
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Graphics gWatermark = Graphics.FromImage(bmWatermark);
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//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();
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//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(255, 0, 255, 0);
colorMap.NewColor = Color.FromArgb(0, 0, 0, 0);
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System.Drawing.Imaging.ColorMap[] remapTable =
{ colorMap };
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imageAttributes.SetRemapTable(remapTable, System.Drawing.Imaging.ColorAdjustType.Bitmap);
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//用矩阵设置水印图片透明度
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float[][] colorMatrixElements =
{
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new float[]
{1.0f, 0.0f, 0.0f, 0.0f, 0.0f},
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new float[]
{0.0f, 1.0f, 0.0f, 0.0f, 0.0f},
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new float[]
{0.0f, 0.0f, 1.0f, 0.0f, 0.0f},
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new float[]
{0.0f, 0.0f, 0.0f, Alpha, 0.0f},
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new float[]
{0.0f, 0.0f, 0.0f, 0.0f, 1.0f}
};
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System.Drawing.Imaging.ColorMatrix wmColorMatrix = new System.Drawing.Imaging.ColorMatrix(colorMatrixElements);
imageAttributes.SetColorMatrix(wmColorMatrix, System.Drawing.Imaging.ColorMatrixFlag.Default, System.Drawing.Imaging.ColorAdjustType.Bitmap);
![](/Images/OutliningIndicators/InBlock.gif)
//确定水印边距
int xPos = imgPhotoWidth - imgWatermarkWidthNew;
int yPos = imgPhotoHeight - imgWatermarkHeightNew;
int xPosOfWm = 0;
int yPosOfWm = 0;
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if (xPos > intDistance)
xPosOfWm = xPos - intDistance;
else
xPosOfWm = xPos;
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if (yPos > intDistance)
yPosOfWm = yPos - intDistance;
else
yPosOfWm = yPos;
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gWatermark.DrawImage(imgWatermark, new Rectangle(xPosOfWm, yPosOfWm, imgWatermarkWidthNew, imgWatermarkHeightNew), 0, 0, imgWatermarkWidth, imgWatermarkHeight, GraphicsUnit.Pixel, imageAttributes);
![](/Images/OutliningIndicators/InBlock.gif)
imgPhoto = bmWatermark;
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imgPhoto.Save(sImgPath, System.Drawing.Imaging.ImageFormat.Jpeg);
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//销毁对象
gbmPhoto.Dispose();
gWatermark.Dispose();
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imgPhoto.Dispose();
imgWatermark.Dispose();
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return true;
}
catch (Exception ex)
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{
return false;
}
}
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![](/Images/OutliningIndicators/InBlock.gif)
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/**//// <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="Alpha">文字透明度 其数值的范围在0到255</param>
/// <param name="widthFont">文字块在图片中所占宽度比例</param>
/// <param name="hScale">高度位置</param>
public bool TextWater(string ImgFile, string TextFont, string sImgPath, int Alpha, float widthFont, float hScale)
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{
try
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{
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);
![](/Images/OutliningIndicators/InBlock.gif)
System.Drawing.Image imgPhoto = System.Drawing.Image.FromStream(ms);
int imgPhotoWidth = imgPhoto.Width;
int imgPhotoHeight = imgPhoto.Height;
![](/Images/OutliningIndicators/InBlock.gif)
Bitmap bmPhoto = new Bitmap(imgPhotoWidth, imgPhotoHeight, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
bmPhoto.SetResolution(72, 72);
Graphics gbmPhoto = Graphics.FromImage(bmPhoto);
gbmPhoto.Clear(Color.FromName("white"));//gif背景色
gbmPhoto.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
gbmPhoto.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
gbmPhoto.DrawImage(imgPhoto, new Rectangle(0, 0, imgPhotoWidth, imgPhotoHeight), 0, 0, imgPhotoWidth, imgPhotoHeight, GraphicsUnit.Pixel);
![](/Images/OutliningIndicators/InBlock.gif)
//建立字体大小的数组,循环找出适合图片的水印字体
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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();
for (int i = 0; i < 43; i++)
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{
crFont = new Font("arial", sizes[i], FontStyle.Bold);
crSize = gbmPhoto.MeasureString(TextFont, crFont);
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if ((ushort)crSize.Width < (ushort)imgPhotoWidth * widthFont)
break;
}
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//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);
![](/Images/OutliningIndicators/InBlock.gif)
System.Drawing.StringFormat StrFormat = new System.Drawing.StringFormat();
StrFormat.Alignment = System.Drawing.StringAlignment.Center;
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//画两次制造透明效果
System.Drawing.SolidBrush semiTransBrush2 = new System.Drawing.SolidBrush(Color.FromArgb(Alpha, 0, 0, 0));
gbmPhoto.DrawString(TextFont, crFont, semiTransBrush2, new System.Drawing.PointF(xCenterOfImg + 1, yPosFromBottom + 1), StrFormat);
![](/Images/OutliningIndicators/InBlock.gif)
System.Drawing.SolidBrush semiTransBrush = new System.Drawing.SolidBrush(Color.FromArgb(Alpha, 255, 255, 255));
gbmPhoto.DrawString(TextFont, crFont, semiTransBrush, new System.Drawing.PointF(xCenterOfImg, yPosFromBottom), StrFormat);
![](/Images/OutliningIndicators/InBlock.gif)
bmPhoto.Save(sImgPath, System.Drawing.Imaging.ImageFormat.Jpeg);
![](/Images/OutliningIndicators/InBlock.gif)
gbmPhoto.Dispose();
imgPhoto.Dispose();
bmPhoto.Dispose();
![](/Images/OutliningIndicators/InBlock.gif)
return true;
}
catch (Exception ex)
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{
return false;
}
}
![](/Images/OutliningIndicators/InBlock.gif)
![](/Images/OutliningIndicators/InBlock.gif)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
/**//// <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white,blue,red,green等</param>
public bool ResizeImg(string ImgFile, string sImgPath, int ResizeWidth, int ResizeHeight, string BgColor)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
try
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{
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);
![](/Images/OutliningIndicators/InBlock.gif)
System.Drawing.Image imgPhoto = System.Drawing.Image.FromStream(ms);
int imgPhotoWidth = imgPhoto.Width;
int imgPhotoHeight = imgPhoto.Height;
int StartX = 0;
int StartY = 0;
int NewWidth = imgPhotoWidth;
int NewHeight = imgPhotoHeight;
![](/Images/OutliningIndicators/InBlock.gif)
//计算缩放图片尺寸
if (NewWidth > ResizeWidth)
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{
NewWidth = ResizeWidth;
NewHeight = Convert.ToInt32(imgPhotoHeight * Math.Round(Convert.ToDecimal(NewWidth) / Convert.ToDecimal(imgPhotoWidth), 10));
}
![](/Images/OutliningIndicators/InBlock.gif)
if (NewHeight > ResizeHeight)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
NewHeight = ResizeHeight;
NewWidth = Convert.ToInt32(imgPhotoWidth * Math.Round(Convert.ToDecimal(NewHeight) / Convert.ToDecimal(imgPhotoHeight), 10));
}
![](/Images/OutliningIndicators/InBlock.gif)
StartX = ResizeWidth - NewWidth;
StartY = ResizeHeight - NewHeight;
![](/Images/OutliningIndicators/InBlock.gif)
StartX = StartX > 0 ? StartX / 2 : 0;
StartY = StartY > 0 ? StartY / 2 : 0;
![](/Images/OutliningIndicators/InBlock.gif)
Bitmap bmPhoto = new Bitmap(ResizeWidth, ResizeHeight, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
bmPhoto.SetResolution(72, 72);
Graphics gbmPhoto = Graphics.FromImage(bmPhoto);
gbmPhoto.Clear(Color.FromName(BgColor));
gbmPhoto.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
gbmPhoto.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
![](/Images/OutliningIndicators/InBlock.gif)
gbmPhoto.DrawImage(imgPhoto, new Rectangle(StartX, StartY, NewWidth, NewHeight), new Rectangle(0, 0, imgPhotoWidth, imgPhotoHeight), GraphicsUnit.Pixel);
bmPhoto.Save(sImgPath, System.Drawing.Imaging.ImageFormat.Jpeg);
![](/Images/OutliningIndicators/InBlock.gif)
imgPhoto.Dispose();
gbmPhoto.Dispose();
bmPhoto.Dispose();
![](/Images/OutliningIndicators/InBlock.gif)
return true;
}
catch (Exception err)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
return false;
}
}
![](/Images/OutliningIndicators/InBlock.gif)
![](/Images/OutliningIndicators/InBlock.gif)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
/**//// <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 CutImg(string ImgFile, string sImgPath, int PointX, int PointY, int CutWidth, int CutHeight)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
try
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
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);
![](/Images/OutliningIndicators/InBlock.gif)
//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(72, 72);
Graphics gbmPhoto = Graphics.FromImage(bmPhoto);
gbmPhoto.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.High;
gbmPhoto.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
![](/Images/OutliningIndicators/InBlock.gif)
gbmPhoto.DrawImage(imgPhoto, new Rectangle(0, 0, CutWidth, CutHeight), new Rectangle(PointX, PointY, CutHeight, CutHeight), GraphicsUnit.Pixel);
bmPhoto.Save(sImgPath, System.Drawing.Imaging.ImageFormat.Jpeg);
![](/Images/OutliningIndicators/InBlock.gif)
imgPhoto.Dispose();
gbmPhoto.Dispose();
bmPhoto.Dispose();
![](/Images/OutliningIndicators/InBlock.gif)
return true;
}
catch (Exception err)
![](/Images/OutliningIndicators/ExpandedSubBlockStart.gif)
{
return false;
}
}
}