- using System.Drawing;
- using System.Drawing.Drawing2D;
- using System.Drawing.Imaging;
- namespace Ycweb.Controls.Utility
- {
- /**/
- /// <summary>
- /// WaterMark
- /// </summary>
- public class Watermark
- {
- private int _width;
- private int _height;
- private string _fontFamily;
- private int _fontSize;
- private bool _adaptable;
- private FontStyle _fontStyle;
- private bool _shadow;
- private string _backgroundImage;
- private Color _bgColor;
- private int _left;
- private string _resultImage;
- private string _text;
- private int _top;
- private int _alpha;
- private int _red;
- private int _green;
- private int _blue;
- private long _quality;
- public Watermark()
- {
- //
- // TODO: Add constructor logic here
- //
- _width = 460;
- _height = 30;
- _fontFamily = "华文行楷";
- _fontSize = 20;
- _fontStyle = FontStyle.Regular;
- _adaptable = true;
- _shadow = false;
- _left = 0;
- _top = 0;
- _alpha = 255;
- _red = 0;
- _green = 0;
- _blue = 0;
- _backgroundImage = "";
- _quality = 100;
- _bgColor = Color.FromArgb(255, 229, 229, 229);
- }
- /**/
- /// <summary>
- /// 字体
- /// </summary>
- public string FontFamily
- {
- set { this._fontFamily = value; }
- }
- /**/
- /// <summary>
- /// 文字大小
- /// </summary>
- public int FontSize
- {
- set { this._fontSize = value; }
- }
- /**/
- /// <summary>
- /// 文字风格
- /// </summary>
- public FontStyle FontStyle
- {
- get { return _fontStyle; }
- set { _fontStyle = value; }
- }
- /**/
- /// <summary>
- /// 透明度0-255,255表示不透明
- /// </summary>
- public int Alpha
- {
- get { return _alpha; }
- set { _alpha = value; }
- }
- /**/
- /// <summary>
- /// 水印文字是否使用阴影
- /// </summary>
- public bool Shadow
- {
- get { return _shadow; }
- set { _shadow = value; }
- }
- public int Red
- {
- get { return _red; }
- set { _red = value; }
- }
- public int Green
- {
- get { return _green; }
- set { _green = value; }
- }
- public int Blue
- {
- get { return _blue; }
- set { _blue = value; }
- }
- /**/
- /// <summary>
- /// 底图
- /// </summary>
- public string BackgroundImage
- {
- set { this._backgroundImage = value; }
- }
- /**/
- /// <summary>
- /// 水印文字的左边距
- /// </summary>
- public int Left
- {
- set { this._left = value; }
- }
- /**/
- /// <summary>
- /// 水印文字的顶边距
- /// </summary>
- public int Top
- {
- set { this._top = value; }
- }
- /**/
- /// <summary>
- /// 生成后的图片
- /// </summary>
- public string ResultImage
- {
- set { this._resultImage = value; }
- }
- /**/
- /// <summary>
- /// 水印文本
- /// </summary>
- public string Text
- {
- set { this._text = value; }
- }
- /**/
- /// <summary>
- /// 生成图片的宽度
- /// </summary>
- public int Width
- {
- get { return _width; }
- set { _width = value; }
- }
- /**/
- /// <summary>
- /// 生成图片的高度
- /// </summary>
- public int Height
- {
- get { return _height; }
- set { _height = value; }
- }
- /**/
- /// <summary>
- /// 若文字太大,是否根据背景图来调整文字大小,默认为适应
- /// </summary>
- public bool Adaptable
- {
- get { return _adaptable; }
- set { _adaptable = value; }
- }
- public Color BgColor
- {
- get { return _bgColor; }
- set { _bgColor = value; }
- }
- /**/
- /// <summary>
- /// 输出图片质量,质量范围0-100,类型为long
- /// </summary>
- public long Quality
- {
- get { return _quality; }
- set { _quality = value; }
- }
- /**/
- /// <summary>
- /// 立即生成水印效果图
- /// </summary>
- /// <returns>生成成功返回true,否则返回false</returns>
- public bool Create()
- {
- try
- {
- Bitmap bitmap;
- Graphics g;
- //使用纯背景色
- if (this._backgroundImage.Trim() == "")
- {
- bitmap = new Bitmap(this._width, this._height, PixelFormat.Format64bppArgb);
- g = Graphics.FromImage(bitmap);
- g.Clear(this._bgColor);
- }
- else
- {
- bitmap = new Bitmap(Image.FromFile(this._backgroundImage));
- g = Graphics.FromImage(bitmap);
- }
- g.SmoothingMode = SmoothingMode.HighQuality;
- g.InterpolationMode = InterpolationMode.HighQualityBicubic;
- g.CompositingQuality = CompositingQuality.HighQuality;
- Font f = new Font(_fontFamily, _fontSize, _fontStyle);
- SizeF size = g.MeasureString(_text, f);
- // 调整文字大小直到能适应图片尺寸
- while (_adaptable == true && size.Width > bitmap.Width)
- {
- _fontSize--;
- f = new Font(_fontFamily, _fontSize, _fontStyle);
- size = g.MeasureString(_text, f);
- }
- Brush b = new SolidBrush(Color.FromArgb(_alpha, _red, _green, _blue));
- StringFormat StrFormat = new StringFormat();
- StrFormat.Alignment = StringAlignment.Near;
- if (this._shadow)
- {
- Brush b2 = new SolidBrush(Color.FromArgb(90, 0, 0, 0));
- g.DrawString(_text, f, b2, _left + 2, _top + 1);
- }
- g.DrawString(_text, f, b, new PointF(_left, _top), StrFormat);
- bitmap.Save(this._resultImage, ImageFormat.Jpeg);
- bitmap.Dispose();
- g.Dispose();
- return true;
- }
- catch
- {
- return false;
- }
- }
- }
- }
- //该片段来自于http://www.codesnippet.cn/detail/290520133640.html
来源: http://www.codesnippet.cn/detail/290520133640.html