/// <summary>
/// 添加图片水印
/// </summary>
/// <param name="oldpath">原图片绝对地址</param>
/// <param name="newpath">新图片放置的绝对地址</param>
/// <param name="wmtType">要添加的水印的类型</param>
/// <param name="wmPosition">水印位置</param>
/// <param name="waterMarkContent">水印内容,若为文字水印，则是要添加的文字；若为图片水印，则是图片的路径</param>
public void addWaterMark(string oldpath, string newpath,WaterMarkType wmType,WaterMarkPosition wmPosition,string wmContent)
{
try
{
Image image = Image.FromFile(oldpath);
Bitmap b = new Bitmap(image.Width, image.Height);
Graphics g = Graphics.FromImage(b);
g.Clear(Color.White);
g.SmoothingMode = SmoothingMode.HighQuality;
g.InterpolationMode = InterpolationMode.High;
g.DrawImage(image, 0, 0, image.Width, image.Height);
switch (wmType)
{
case WaterMarkType.TextMark:
this.addWatermarkText(g, wmContent, wmPosition, image.Width, image.Height);
break;
case WaterMarkType.ImageMark:
Image waterMarkImage = Image.FromFile(wmContent);
this.addWatermarkImage(g, waterMarkImage, wmPosition, image.Width, image.Height);
break;
}
b.Save(newpath,ImageFormat.Jpeg);
b.Dispose();
image.Dispose();
}
catch(Exception ex)
{
MessageBox.Show("图片生成水印异常："+ex.Message);
}
finally
{
}
}
public InMemoryImage Render(InMemoryImage sourceImage, WaterMarkPosition position)
{
//from http://www.codeproject.com/KB/GDI-plus/watermark.aspx
Graphics gSource = Graphics.FromImage(sourceImage.Image);
ImageAttributes imageAttributes = new ImageAttributes();
ColorMap colorMap = new ColorMap();
// The first step in manipulating the watermark image is to replace the
// background color (green) with one that is transparent (Alpha=0, R=0, G=0, B=0).
colorMap.OldColor = Color.FromArgb(255, 0, 255, 0);
colorMap.NewColor = Color.FromArgb(0, 0, 0, 0);
ColorMap[] remapTable = { colorMap };
imageAttributes.SetRemapTable(remapTable, ColorAdjustType.Bitmap);
//The second color manipulation is used to change the opacity of the watermark.
//This is done by applying a 5x5 matrix that contains the coordinates for the RGBA space.
//By setting the 3rd row and 3rd column to 0.3f we achieve a level of opacity.
//The result is a watermark which slightly shows the underlying image.
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, 0.5f, 0.0f },
new float[] { 0.0f, 0.0f, 0.0f, 0.0f, 1.0f }
};
ColorMatrix wmColorMatrix = new ColorMatrix(colorMatrixElements);
imageAttributes.SetColorMatrix(wmColorMatrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap);
int xPosOfWm = Math.Min(sourceImage.Image.Width / 25, 10);
int yPosOfWm = Math.Min(sourceImage.Image.Height / 25, 10);
Point watPosition = GetWatermarkCoordinates(sourceImage, position);
gSource.DrawImage(watermark,
new Rectangle(watPosition.X, watPosition.Y, watermark.Width, watermark.Height),
0,
0,
watermark.Width,
watermark.Height,
GraphicsUnit.Pixel,
imageAttributes);
gSource.Dispose();
return(sourceImage);
}
private Point GetWatermarkCoordinates(InMemoryImage sourceImage, WaterMarkPosition position)
{
float safeMargin = 0.05f;
float xOffsetPercent = 0f, yOffsetPercent = 0f;
float xW, yW = 0; //position of left upper corner of watermark
switch (position)
{
case WaterMarkPosition.Center:
xOffsetPercent = 50;
yOffsetPercent = 50;
break;
case WaterMarkPosition.RightBottom:
xOffsetPercent = 95;
yOffsetPercent = 95;
break;
case WaterMarkPosition.RightUpper:
xOffsetPercent = 95;
yOffsetPercent = 5;
break;
case WaterMarkPosition.LeftBottom:
xOffsetPercent = 5;
yOffsetPercent = 95;
break;
case WaterMarkPosition.LeftUpper:
xOffsetPercent = 5;
yOffsetPercent = 5;
break;
case WaterMarkPosition.CenterUpper:
xOffsetPercent = 50;
yOffsetPercent = 5;
break;
}
xOffsetPercent = xOffsetPercent / 100;
yOffsetPercent = yOffsetPercent / 100;
//
xW = (sourceImage.Image.Size.Height * (xOffsetPercent)) - watermark.Size.Height * xOffsetPercent;
yW = (sourceImage.Image.Size.Width * (yOffsetPercent)) - watermark.Size.Width * yOffsetPercent;
//set safe margins
xW = Math.Max(xW, sourceImage.Image.Size.Height * safeMargin);
xW = Math.Min(xW, sourceImage.Image.Size.Height * (1 - safeMargin) - watermark.Size.Height);
yW = Math.Max(yW, sourceImage.Image.Size.Width * safeMargin);
yW = Math.Min(yW, sourceImage.Image.Size.Width * (1 - safeMargin) - watermark.Size.Width);
return(new Point(Convert.ToInt32(yW), Convert.ToInt32(xW)));
}
private void addWatermarkText(Graphics picture, string _watermarkText, WaterMarkPosition _watermarkPosition, int _width, int _height)
{
int[] array = new int[]
{
32,
30,
28,
26,
24,
22,
20,
18,
16,
14,
12,
10,
8,
6,
4
};
Font font = null;
SizeF sizeF = default(SizeF);
for (int i = 0; i < array.Length; i++)
{
font = new Font("Arial Black", (float)array[i], FontStyle.Bold);
sizeF = picture.MeasureString(_watermarkText, font);
if ((ushort)sizeF.Width < (ushort)_width)
{
break;
}
}
Bitmap bitmap = new Bitmap((int)sizeF.Width + 3, (int)sizeF.Height + 3, PixelFormat.Format32bppArgb);
Graphics graphics = Graphics.FromImage(bitmap);
PointF pointF = new PointF(0f, 0f);
Brush brush = new SolidBrush(Color.FromArgb(255, Color.Black));
Brush brush2 = new SolidBrush(Color.FromArgb(255, Color.Black));
graphics.DrawString(_watermarkText, font, brush, pointF.X, pointF.Y + 1f);
graphics.DrawString(_watermarkText, font, brush, pointF.X + 1f, pointF.Y);
graphics.DrawString(_watermarkText, font, brush2, pointF.X + 1f, pointF.Y + 1f);
graphics.DrawString(_watermarkText, font, brush2, pointF.X, pointF.Y + 2f);
graphics.DrawString(_watermarkText, font, brush2, pointF.X + 2f, pointF.Y);
brush.Dispose();
brush2.Dispose();
graphics.SmoothingMode = SmoothingMode.HighQuality;
graphics.DrawString(_watermarkText, font, new SolidBrush(Color.White), pointF.X, pointF.Y, StringFormat.GenericDefault);
graphics.Save();
graphics.Dispose();
this.addWatermarkImage(picture, new Bitmap(bitmap), WaterMarkPosition.WMP_Right_Bottom, _width, _height);
}
/// <summary>
/// 添加水印(分图片水印与文字水印两种)
/// </summary>
/// <param name="oldpath">原图片绝对地址</param>
/// <param name="newpath">新图片放置的绝对地址</param>
/// <param name="wmpPosition">要添加的水印的位置</param>
/// <param name="wmtType">要添加的水印的类型</param>
/// <param name="sWaterMarkContent">水印内容，若添加文字水印，此即为要添加的文字；
/// 若要添加图片水印，此为图片的路径</param>
public void addWaterMark(string oldpath, string newpath, WaterMarkPosition wmpPosition,
WaterMarkType wmtType, string sWaterMarkContent)
{
try
{
Image image = Image.FromFile(oldpath);
Bitmap b = new Bitmap(image.Width, image.Height,
PixelFormat.Format24bppRgb);
Graphics g = Graphics.FromImage(b);
g.Clear(Color.White);
g.SmoothingMode = SmoothingMode.HighQuality;
g.InterpolationMode = InterpolationMode.High;
g.DrawImage(image, 0, 0, image.Width, image.Height);
switch (wmtType)
{
case WaterMarkType.TextMark:
//文字水印
this.addWatermarkText(g, sWaterMarkContent, wmpPosition.ToString(),
image.Width, image.Height);
break;
case WaterMarkType.ImageMark:
//图片水印
Image imageWatermark = Image.FromFile(sWaterMarkContent);
this.addWatermarkImage(g, imageWatermark, wmpPosition.ToString(), image.Width, image.Height);
break;
}
b.Save(newpath);
b.Dispose();
image.Dispose();
}
catch
{
if (File.Exists(oldpath))
{
//File.Delete(oldpath);
}
}
finally
{
if (File.Exists(oldpath))
{
//File.Delete(oldpath);
}
}
}
public static Bitmap WaterMark(Image Image, Image WaterImage, WaterMarkPosition WaterMarkPosition = WaterMarkPosition.Center)
{
switch (WaterMarkPosition)
{
case WaterMarkPosition.Right:
WaterImage = LimitSize(WaterImage, new Size(Image.Width / 3, 0));
using (var g = Graphics.FromImage(Image))
{
g.DrawImage(WaterImage, Image.Width - (WaterImage.Width + 20), Image.Height - (WaterImage.Height + 20));
}
break;
case WaterMarkPosition.Left:
WaterImage = LimitSize(WaterImage, new Size(Image.Width / 3, 0));
using (var g = Graphics.FromImage(Image))
{
g.DrawImage(WaterImage, 20, Image.Height - (WaterImage.Height + 20));
}
break;
case WaterMarkPosition.Center:
WaterImage = LimitSize(WaterImage, new Size((Image.Width / 3) * 2, 0));
using (var g = Graphics.FromImage(Image))
{
g.DrawImage(WaterImage, (Image.Width - WaterImage.Width) / 2, (Image.Height / 3) * 2);
}
break;
}
return((Bitmap)Image);
}
/// <summary>
/// 给图片添加图片水印
/// </summary>
/// <param name="sourceImageFile">源图片路径</param>
/// <param name="waterMarkImageFile">水印图片路径</param>
/// <param name="resultImageFile">结果图片保存路径</param>
/// <param name="position">水印在图片中的位置</param>
/// <param name="deleteSouceImageFile">是否删除源图片</param>
/// <returns>添加图片水印是否成功</returns>
public static bool AddImageWaterMark
(
string sourceImageFile,
string waterMarkImageFile,
string resultImageFile,
WaterMarkPosition position,
bool deleteSouceImageFile
)
{
bool result = false;
{
if (FileHelper.CheckExists(sourceImageFile) && FileHelper.CheckExists(waterMarkImageFile))
{
using (System.Drawing.Image sourceImage = System.Drawing.Image.FromFile(sourceImageFile))
{
using (System.Drawing.Image waterMarkImage = System.Drawing.Image.FromFile(waterMarkImageFile))
{
using (Graphics g = Graphics.FromImage(sourceImage))
{
switch (position)
{
#region LeftTop
case WaterMarkPosition.LeftTop:
g.DrawImage
(
waterMarkImage,
new Rectangle(0, 0, waterMarkImage.Width, waterMarkImage.Height),
new Rectangle(0, 0, waterMarkImage.Width, waterMarkImage.Height),
GraphicsUnit.Pixel
);
break;
#endregion
#region LeftBottom
case WaterMarkPosition.LeftBottom:
g.DrawImage
(
waterMarkImage,
new Rectangle(0, sourceImage.Height - waterMarkImage.Height, waterMarkImage.Width, waterMarkImage.Height),
new Rectangle(0, 0, waterMarkImage.Width, waterMarkImage.Height),
GraphicsUnit.Pixel
);
break;
#endregion
#region RightTop
case WaterMarkPosition.RightTop:
g.DrawImage
(
waterMarkImage,
new Rectangle(sourceImage.Width - waterMarkImage.Width, 0, waterMarkImage.Width, waterMarkImage.Height),
new Rectangle(0, 0, waterMarkImage.Width, waterMarkImage.Height),
GraphicsUnit.Pixel
);
break;
#endregion
#region RightBottom
case WaterMarkPosition.RightBottom:
g.DrawImage
(
waterMarkImage,
new Rectangle(sourceImage.Width - waterMarkImage.Width, sourceImage.Height - waterMarkImage.Height, waterMarkImage.Width, waterMarkImage.Height),
new Rectangle(0, 0, waterMarkImage.Width, waterMarkImage.Height),
GraphicsUnit.Pixel
);
break;
#endregion
}
sourceImage.Save(resultImageFile, sourceImage.RawFormat);
}
}
}
if (deleteSouceImageFile)
{
FileHelper.DeleteFile(sourceImageFile, true);
}
result = true;
}
}
return(result);
}
/// <summary>
/// 加水印图片
/// </summary>
/// <param name="picture">Image对象</param>
/// <param name="iTheImage">Image对象（以此图片为水印）</param>
/// <param name="_watermarkPosition">水印位置</param>
/// <param name="_width">被加水印图片的宽</param>
/// <param name="_height">被加水印图片的高</param>
private void addWatermarkImage(Graphics picture, Image iTheImage, WaterMarkPosition _waterMarkPosition, int _width, int _height)
{
Image watermark = new Bitmap(iTheImage);
ImageAttributes imageAttributes = new ImageAttributes();
ColorMap colorMap = new ColorMap();
colorMap.OldColor = Color.FromArgb(255, 0, 255, 0);
colorMap.NewColor = Color.FromArgb(0, 0, 0, 0);
ColorMap[] remapTable = {colorMap};
imageAttributes.SetRemapTable(remapTable, ColorAdjustType.Bitmap);
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, 0.3f, 0.0f},
new float[] {0.0f, 0.0f, 0.0f, 0.0f, 1.0f}
};
ColorMatrix colorMatrix = new ColorMatrix(colorMatrixElements);
imageAttributes.SetColorMatrix(colorMatrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap);
int xpos = 0;
int ypos = 0;
int WatermarkWidth = 0;
int WatermarkHeight = 0;
double bl = 1d;
//计算水印图片的比率
//取背景的1/4宽度来比较
if ((_width > watermark.Width * 4) && (_height > watermark.Height * 4))
{
bl = 1;
}
else if ((_width > watermark.Width * 4) && (_height<watermark.Height * 4))
{
bl = Convert.ToDouble(_height / 4) / Convert.ToDouble(watermark.Height);
}
else if ((_width < watermark.Width * 4) && (_height > watermark.Height * 4))
{
bl = Convert.ToDouble(_width / 4) / Convert.ToDouble(watermark.Width);
}
else
{
if ((_width * watermark.Height) > (_height * watermark.Width))
{
bl = Convert.ToDouble(_height / 4) / Convert.ToDouble(watermark.Height);
}
else
{
bl = Convert.ToDouble(_width / 4) / Convert.ToDouble(watermark.Width);
}
}
WatermarkWidth = Convert.ToInt32(watermark.Width * bl);
WatermarkHeight = Convert.ToInt32(watermark.Height * bl);
switch (_waterMarkPosition)
{
case WaterMarkPosition.LEFT_TOP:
xpos = 10;
ypos = 10;
break;
case WaterMarkPosition.RIGHT_TOP:
xpos = _width - WatermarkWidth - 10;
ypos = 10;
break;
case WaterMarkPosition.RIGHT_BOTTOM:
xpos = _width - WatermarkWidth - 10;
ypos = _height -WatermarkHeight - 10;
break;
case WaterMarkPosition.LEFT_BOTTOM:
xpos = 10;
ypos = _height - WatermarkHeight - 10;
break;
}
picture.DrawImage( watermark, new Rectangle(xpos, ypos, WatermarkWidth, WatermarkHeight), 0, 0, watermark.Width, watermark.Height,GraphicsUnit.Pixel, imageAttributes);
watermark.Dispose();
imageAttributes.Dispose();
}
/// <summary>
/// 图片水印
/// </summary>
/// <param name="imgPath">原图绝对路径</param>
/// <param name="savePath">生成图绝对路径</param>
/// <param name="waterMarkPath">水印图片路径</param>
/// <param name="wmPosition">水印位置</param>
/// <param name="transparency">透明度(0-1)</param>
/// <returns></returns>
public static bool AddImageWaterMark(string imgPath, string savePath, string waterMarkPath, WaterMarkPosition wmPosition, float transparency)
{
Bitmap image = null;
Graphics g = null;
Image watermark = null;
ImageAttributes imageAttributes = null;
try
{
//创建一个图片对象用来装载要被添加水印的图片
Image image1 = Image.FromStream(ByteToStream(SetImageToByteArray(imgPath)));
image = new Bitmap(image1);
image1.Dispose();
g = Graphics.FromImage(image);
//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;
watermark = new Bitmap(waterMarkPath);
//if (watermark.Height >= image.Height || watermark.Width >= image.Width)
//{
// //如果水印图片高宽超过原始图片则返回
// g.Dispose();
// image.Dispose();
// watermark.Dispose();
// return false;
//}
imageAttributes = new ImageAttributes();
ColorMap colorMap = new ColorMap();
colorMap.OldColor = Color.FromArgb(255, 0, 255, 0);
colorMap.NewColor = Color.FromArgb(0, 0, 0, 0);
ColorMap[] remapTable = { colorMap };
imageAttributes.SetRemapTable(remapTable, ColorAdjustType.Bitmap);
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 }
};
ColorMatrix colorMatrix = new ColorMatrix(colorMatrixElements);
imageAttributes.SetColorMatrix(colorMatrix, ColorMatrixFlag.Default, ColorAdjustType.Bitmap);
int xpos = 0;
int ypos = 0;
switch (wmPosition)
{
case WaterMarkPosition.Left_Top:
xpos = (int)(image.Width * (float).01);
ypos = (int)(image.Height * (float).01);
break;
case WaterMarkPosition.Right_Top:
xpos = (int)((image.Width * (float).99) - (watermark.Width));
ypos = (int)(image.Height * (float).01);
break;
case WaterMarkPosition.Middle:
xpos = (int)((image.Width * (float).50) - (watermark.Width / 2));
ypos = (int)((image.Height * (float).50) - (watermark.Height / 2));
break;
case WaterMarkPosition.Left_Bottom:
xpos = (int)(image.Width * (float).01);
ypos = (int)((image.Height * (float).99) - watermark.Height);
break;
case WaterMarkPosition.Right_Bottom:
xpos = (int)((image.Width * (float).99) - (watermark.Width));
ypos = (int)((image.Height * (float).99) - watermark.Height);
break;
}
g.DrawImage(watermark, new Rectangle(xpos, ypos, watermark.Width, watermark.Height), 0, 0, watermark.Width, watermark.Height, GraphicsUnit.Pixel, imageAttributes);
ImageCodecInfo[] codecs = ImageCodecInfo.GetImageEncoders();
ImageCodecInfo ici = null;
foreach (ImageCodecInfo codec in codecs)
{
if (codec.MimeType.IndexOf("jpeg") > -1)
{
ici = codec;
}
}
EncoderParameters encoderParams = new EncoderParameters();
long[] qualityParam = new long[1];
qualityParam[0] = 80;
EncoderParameter encoderParam = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, qualityParam);
encoderParams.Param[0] = encoderParam;
if (ici != null)
{
image.Save(savePath, ici, encoderParams);
}
else
{
image.Save(savePath);
}
g.Dispose();
image.Dispose();
watermark.Dispose();
imageAttributes.Dispose();
return(true);
}
catch
{
return(false);
}
finally
{
if (g != null)
{
g.Dispose();
}
if (image != null)
{
image.Dispose();
}
if (watermark != null)
{
watermark.Dispose();
}
if (imageAttributes != null)
{
imageAttributes.Dispose();
}
}
}
public static Texture2D AddWatermark(Texture2D background, Texture2D watermark, WaterMarkPosition position = WaterMarkPosition.RightTop)
{
int startX = 0;
int startY = 0;
switch (position)
{
case WaterMarkPosition.RightTop:
startX = 0;
startY = background.height - watermark.height;
break;
case WaterMarkPosition.LeftTop:
startX = background.width - watermark.width;
startY = background.height - watermark.height;
break;
case WaterMarkPosition.RightBottom:
startX = 0;
startY = 0;
break;
case WaterMarkPosition.LeftBottom:
startX = background.width - watermark.width;
startY = 0;
break;
}
for (int x = startX; x < background.width; x++)
{
for (int y = startY; y < background.height; y++)
{
Color bgColor = background.GetPixel(x, y);
Color wmColor = watermark.GetPixel(x - startX, y - startY);
Color final_color = Color.Lerp(bgColor, wmColor, wmColor.a / 1.0f);
background.SetPixel(x, y, final_color);
}
}
background.Apply();
return(background);
}
/// <summary>
/// 生成图片或文字水印
/// </summary>
/// <param name="imgPath">原图绝对路径</param>
/// <param name="savePath">生成图路径</param>
/// <param name="waterMarkPathOrmarkText">水印图片路径或文字水印内容</param>
/// <param name="wmType">水印类型，文字或者图片</param>
/// <param name="wmPosition">水印位置</param>
/// <param name="transparency">透明度</param>
/// <returns>是否成功</returns>
public static bool AddWaterMark(string imgPath, string savePath, string waterMarkPathOrmarkText, WaterMarkType wmType, WaterMarkPosition wmPosition, float transparency)
{
switch (wmType)
{
case WaterMarkType.ImageMark:
return(AddImageWaterMark(imgPath, savePath, waterMarkPathOrmarkText, wmPosition, transparency));
case WaterMarkType.TextMark:
return(AddTextWaterMark(imgPath, savePath, waterMarkPathOrmarkText, wmPosition, transparency, 0f));
default:
return(false);
}
}
/// <summary>
/// 文字水印
/// </summary>
/// <param name="imgPath">原图绝对路径</param>
/// <param name="savePath">生成图绝对路径</param>
/// <param name="markText">水印文字</param>
/// <param name="wmPosition">水印位置</param>
/// <param name="transparency">透明度(0-1)</param>
/// <param name="fontSize">文字大小,0 则随图片自动调整大小</param>
/// <returns></returns>
public static bool AddTextWaterMark(string imgPath, string savePath, string markText, WaterMarkPosition wmPosition, float transparency, float fontSize)
{
Bitmap image = null;
Graphics g = null;
try
{
//创建一个图片对象用来装载要被添加水印的图片
Image image1 = Image.FromStream(ByteToStream(SetImageToByteArray(imgPath)));
image = new Bitmap(image1);
image1.Dispose();
g = Graphics.FromImage(image);
//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;
//************* 文字水印 *****************
int imgWidth = image.Width;
int imgHeight = image.Height;
int[] sizes = new int[] { 48, 36, 28, 24, 16, 14, 12, 10 };
Font font = null;
SizeF crSize = new SizeF();
if (fontSize == 0)
{
//利用一个循环语句来选择我们要添加文字的型号
//直到它的长度比图片的宽度小
for (int i = 0; i < sizes.Length; i++)
{
font = new Font("宋体", sizes[i], FontStyle.Bold);
//测量用指定的 Font 对象绘制并用指定的 StringFormat 对象格式化的指定字符串。
crSize = g.MeasureString(markText, font);
// ushort 关键字表示一种整数数据类型
if ((ushort)crSize.Width < (ushort)imgWidth * 0.5)
{
break;
}
}
}
else
{
font = new Font("宋体", fontSize, FontStyle.Bold); //定义字体 ;
crSize = g.MeasureString(markText, font);
}
int xpos = 0;
int ypos = 0;
switch (wmPosition)
{
case WaterMarkPosition.Left_Top:
xpos = (int)(image.Width * (float).01);
ypos = (int)(image.Height * (float).01);
break;
case WaterMarkPosition.Right_Top:
xpos = (int)((image.Width * (float).99) - (crSize.Width));
ypos = (int)(image.Height * (float).01);
break;
case WaterMarkPosition.Middle:
xpos = (int)((image.Width * (float).50) - (crSize.Width / 2));
ypos = (int)((image.Height * (float).50) - (crSize.Height / 2));
break;
case WaterMarkPosition.Left_Bottom:
xpos = (int)(image.Width * (float).01);
ypos = (int)((image.Height * (float).99) - crSize.Height);
break;
case WaterMarkPosition.Right_Bottom:
xpos = (int)((image.Width * (float).99) - (crSize.Width));
ypos = (int)((image.Height * (float).99) - crSize.Height);
break;
}
g.DrawString(markText, font, new SolidBrush(Color.FromArgb((int)(transparency * 255), 0, 0, 0)), xpos + 1, ypos + 1);
g.DrawString(markText, font, new SolidBrush(Color.FromArgb((int)(transparency * 255), 255, 255, 255)), xpos, ypos);
ImageCodecInfo[] codecs = ImageCodecInfo.GetImageEncoders();
ImageCodecInfo ici = null;
foreach (ImageCodecInfo codec in codecs)
{
if (codec.MimeType.IndexOf("jpeg") > -1)
{
ici = codec;
}
}
EncoderParameters encoderParams = new EncoderParameters();
long[] qualityParam = new long[1];
qualityParam[0] = 80;
EncoderParameter encoderParam = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, qualityParam);
encoderParams.Param[0] = encoderParam;
if (ici != null)
{
image.Save(savePath, ici, encoderParams);
}
else
{
image.Save(savePath);
}
return(true);
}
catch
{
return(false);
}
finally
{
g.Dispose();
image.Dispose();
}
}
public void AddWaterMark(Image waterMark, WaterMarkPosition position, float angle) {
if (angle != 0) {
Rotate(ref waterMark, angle);
}
var attributes = new ImageAttributes();
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, 0.3f, 0.0f},
new float[] {0.0f, 0.0f, 0.0f, 0.0f, 1.0f}};
ColorMatrix wmColorMatrix = new ColorMatrix(colorMatrixElements);
attributes.SetColorMatrix(wmColorMatrix, ColorMatrixFlag.Default,
ColorAdjustType.Bitmap);
int xPosOfWm, yPosOfWm;
switch (position) {
case WaterMarkPosition.Center:
xPosOfWm = (CurrentImage.Width / 2) - (waterMark.Width / 2);
yPosOfWm = (CurrentImage.Height / 2) - (waterMark.Height / 2);
break;
case WaterMarkPosition.RightTop:
default:
xPosOfWm = CurrentImage.Width - waterMark.Width - 10;
yPosOfWm = 10;
break;
}
using (var graphics = Graphics.FromImage(CurrentImage)) {
SetHighQuality(graphics);
graphics.DrawImage(waterMark,
new Rectangle(xPosOfWm, yPosOfWm, waterMark.Width, waterMark.Height), //Set the detination Position
0, // x-coordinate of the portion of the source image to draw.
0, // y-coordinate of the portion of the source image to draw.
waterMark.Width, // Watermark Width
waterMark.Height, // Watermark Height
GraphicsUnit.Pixel, // Unit of measurment
attributes); //ImageAttributes Object
}
}
public void addWaterMark(string oldpath, string newpath, WaterMarkType wmtType, string sWaterMarkContent, WaterMarkPosition position)
{
try
{
Image image = Image.FromFile(oldpath);
Bitmap bitmap = new Bitmap(image.Width, image.Height, PixelFormat.Format24bppRgb);
Graphics graphics = Graphics.FromImage(bitmap);
graphics.Clear(Color.White);
graphics.SmoothingMode = SmoothingMode.HighQuality;
graphics.InterpolationMode = InterpolationMode.High;
graphics.DrawImage(image, 0, 0, image.Width, image.Height);
switch (wmtType)
{
case WaterMarkType.TextMark:
this.addWatermarkText(graphics, sWaterMarkContent, position, image.Width, image.Height);
break;
case WaterMarkType.ImageMark:
this.addWatermarkImage(graphics, HttpContext.Current.Server.MapPath(sWaterMarkContent), position, image.Width, image.Height);
break;
}
image.Dispose();
if (newpath != "")
{
bitmap.Save(newpath);
}
else
{
bitmap.Save(oldpath);
}
bitmap.Dispose();
}
catch
{
if (newpath != "" && File.Exists(oldpath))
{
File.Delete(oldpath);
}
}
finally
{
if (newpath != "" && File.Exists(oldpath))
{
File.Delete(oldpath);
}
}
}
private void addWatermarkImage(Graphics picture, Image iTheImage, WaterMarkPosition _watermarkPosition, int _width, int _height)
{
Image image = new Bitmap(iTheImage);
ImageAttributes imageAttributes = new ImageAttributes();
ColorMap[] map = new ColorMap[]
{
new ColorMap
{
OldColor = Color.FromArgb(255, 0, 255, 0),
NewColor = Color.FromArgb(0, 0, 0, 0)
}
};
imageAttributes.SetRemapTable(map, ColorAdjustType.Bitmap);
float[][] array = new float[5][];
float[][] arg_6F_0 = array;
int arg_6F_1 = 0;
float[] array2 = new float[5];
array2[0] = 1f;
arg_6F_0[arg_6F_1] = array2;
float[][] arg_86_0 = array;
int arg_86_1 = 1;
float[] array3 = new float[5];
array3[1] = 1f;
arg_86_0[arg_86_1] = array3;
float[][] arg_9D_0 = array;
int arg_9D_1 = 2;
float[] array4 = new float[5];
array4[2] = 1f;
arg_9D_0[arg_9D_1] = array4;
float[][] arg_B4_0 = array;
int arg_B4_1 = 3;
float[] array5 = new float[5];
array5[3] = 0.3f;
arg_B4_0[arg_B4_1] = array5;
array[4] = new float[]
{
0f,
0f,
0f,
0f,
1f
};
float[][] newColorMatrix = array;
ColorMatrix newColorMatrix2 = new ColorMatrix(newColorMatrix);
imageAttributes.SetColorMatrix(newColorMatrix2, ColorMatrixFlag.Default, ColorAdjustType.Bitmap);
int x = 0;
int y = 0;
double num;
if (_width > image.Width * 2 && _height > image.Height * 2)
{
num = 1.0;
}
else
{
if (_width > image.Width * 2 && _height < image.Height * 2)
{
num = Convert.ToDouble(_height / 2) / Convert.ToDouble(image.Height);
}
else
{
if (_width < image.Width * 2 && _height > image.Height * 2)
{
num = Convert.ToDouble(_width / 2) / Convert.ToDouble(image.Width);
}
else
{
if (_width * image.Height > _height * image.Width)
{
num = Convert.ToDouble(_height / 2) / Convert.ToDouble(image.Height);
}
else
{
num = Convert.ToDouble(_width / 2) / Convert.ToDouble(image.Width);
}
}
}
}
int num2 = Convert.ToInt32((double)image.Width * num);
int num3 = Convert.ToInt32((double)image.Height * num);
switch (_watermarkPosition)
{
case WaterMarkPosition.WMP_Left_Top:
x = 10;
y = 10;
break;
case WaterMarkPosition.WMP_Left_Bottom:
x = 10;
y = _height - num3 - 10;
break;
case WaterMarkPosition.WMP_Right_Top:
x = _width - num2 - 10;
y = 10;
break;
case WaterMarkPosition.WMP_Right_Bottom:
x = _width - num2 - 10;
y = _height - num3 - 10;
break;
}
picture.DrawImage(image, new Rectangle(x, y, num2, num3), 0, 0, image.Width, image.Height, GraphicsUnit.Pixel, imageAttributes);
image.Dispose();
imageAttributes.Dispose();
}
private void addWatermarkImage(Graphics picture, string WaterMarkPicPath, WaterMarkPosition _watermarkPosition, int _width, int _height)
{
Image iTheImage = new Bitmap(WaterMarkPicPath);
this.addWatermarkImage(picture, iTheImage, _watermarkPosition, _width, _height);
}
/// <summary>
/// 加水印文字
/// </summary>
/// <param name="picture">imge 对象</param>
/// <param name="_watermarkText">水印文字内容</param>
/// <param name="_watermarkPosition">水印位置</param>
/// <param name="_width">被加水印图片的宽</param>
/// <param name="_height">被加水印图片的高</param>
private void addWatermarkText(Graphics picture, string _watermarkText,WaterMarkPosition _waterMarkPosition, int _width, int _height)
{
// 确定水印文字的字体大小
int[] sizes = new int[]{32, 30, 28, 26, 24, 22, 20, 18, 16, 14, 12, 10, 8, 6, 4};
Font crFont = null;
SizeF crSize = new SizeF();
for (int i = 0;i < sizes.Length; i++)
{
crFont = new Font("Arial Black", sizes[i], FontStyle.Bold);
crSize = picture.MeasureString(_watermarkText, crFont);
if((ushort)crSize.Width < (ushort)_width)
{
break;
}
}
// 生成水印图片（将文字写到图片中）
Bitmap floatBmp = new Bitmap((int)crSize.Width + 3, (int)crSize.Height + 3, PixelFormat.Format32bppArgb);
Graphics fg=Graphics.FromImage(floatBmp);
PointF pt=new PointF(0,0);
// 画阴影文字
Brush TransparentBrush0 = new SolidBrush(Color.FromArgb(255, Color.Black));
Brush TransparentBrush1 = new SolidBrush(Color.FromArgb(255, Color.Black));
fg.DrawString(_watermarkText,crFont,TransparentBrush0, pt.X, pt.Y + 1);
fg.DrawString(_watermarkText,crFont,TransparentBrush0, pt.X + 1, pt.Y);
fg.DrawString(_watermarkText,crFont,TransparentBrush1, pt.X + 1, pt.Y + 1);
fg.DrawString(_watermarkText,crFont,TransparentBrush1, pt.X, pt.Y + 2);
fg.DrawString(_watermarkText,crFont,TransparentBrush1, pt.X + 2, pt.Y);
TransparentBrush0.Dispose();
TransparentBrush1.Dispose();
// 画文字
fg.SmoothingMode=System.Drawing.Drawing2D.SmoothingMode.HighQuality;
fg.DrawString(_watermarkText, crFont, new SolidBrush(Color.White), pt.X, pt.Y, StringFormat.GenericDefault);
// 保存刚才的操作
fg.Save();
fg.Dispose();
// 将水印图片加到原图中
this.addWatermarkImage(picture, new Bitmap(floatBmp),_waterMarkPosition, _width, _height);
}
private void buttonCreate_Click(object sender, EventArgs e)
{
if (textBoxPicture.Text.Trim() == "")
{
MessageBox.Show("原圖不存在！");
return;
}
if (textBoxWatermark.Text.Trim() == "")
{
MessageBox.Show("水印内容不存在！");
return;
}
if (!radioButtonFont.Checked && !radioButtonPicture.Checked)
{
MessageBox.Show("水印類型未選擇！");
return;
}
if (comboBoxPosition.Text.Trim() == "")
{
MessageBox.Show("水印位置未選擇！");
return;
}
string SourceImagePath = textBoxPicture.Text.Trim();
string strPath = Path.GetFullPath(SourceImagePath).Replace(Path.GetFileName(SourceImagePath), "");
string sExt = SourceImagePath.Substring(
SourceImagePath.LastIndexOf(".")).ToLower();
string SaveImagePath = strPath + DateTime.Now.Ticks.ToString() + sExt;
WaterMarkBll objWMB = new WaterMarkBll();
WaterMarkPosition wmpPosition = new WaterMarkPosition();
switch (comboBoxPosition.Text)
{
case "左上角":
wmpPosition = WaterMarkPosition.WMP_Left_Top;
break;
case "右上角":
wmpPosition = WaterMarkPosition.WMP_Right_Top;
break;
case "居中":
wmpPosition = WaterMarkPosition.WMP_Center;
break;
case "左下角":
wmpPosition = WaterMarkPosition.WMP_Left_Bottom;
break;
case "右下角":
wmpPosition = WaterMarkPosition.WMP_Right_Bottom;
break;
}
if (radioButtonFont.Checked)
{
objWMB.addWaterMark(SourceImagePath, SaveImagePath, wmpPosition, WaterMarkType.TextMark, textBoxWatermark.Text);
}
else
{
objWMB.addWaterMark(SourceImagePath, SaveImagePath, wmpPosition, WaterMarkType.ImageMark, textBoxWatermark.Text);
}
string ThumbnailImage = strPath + DateTime.Now.Ticks.ToString() + sExt;
objWMB.ToThumbnailImages(SaveImagePath, ThumbnailImage, pictureBoxWatermark.Width);
pictureBoxWatermark.Image = Image.FromFile(ThumbnailImage);
}
public void AddWaterMark(Image waterMark, WaterMarkPosition position) {
AddWaterMark(waterMark, position, 0);
}