C#图片处理类
using
System;
using
System.Collections.Generic;
using
System.Drawing;
using
System.Drawing.Imaging;
using
System.IO;
using
System.Drawing.Drawing2D;
namespace
Silent.Web.Controllers.Common
{
/// <summary>
/// ASPJpegBase /// Author : Jolly
/// </summary> public class ASPJpegBase : IDisposable { /// <summary> /// 会产生graphics异常的PixelFormat /// </summary> private static PixelFormat[] indexedPixelFormats = { PixelFormat.Undefined, PixelFormat.DontCare, PixelFormat.Format16bppArgb1555, PixelFormat.Format1bppIndexed, PixelFormat.Format4bppIndexed, PixelFormat.Format8bppIndexed }; /// <summary> /// 图片宽度--生成缩略图时使用 /// </summary> public int Width { get; set; } /// <summary> /// 图片高度--生成缩略图时使用 /// </summary> public int Height { get; set; } /// <summary> /// Bitmap对象 /// </summary> public Bitmap CurrentBitmap { get { if (oCurrentImage == null) throw new NullReferenceException("CurrentBitmap is null!"); return oCurrentImage; } } private Bitmap oCurrentImage; private ASPJpegEffect etASPJpegEffect; /// <summary> /// 图片特效处理 /// </summary> public ASPJpegEffect Effect { get { etASPJpegEffect = new ASPJpegEffect(); etASPJpegEffect.CurrentBitmap = this.CurrentBitmap; return etASPJpegEffect; } } /// <summary> /// 默认构造函数 /// </summary> public ASPJpegBase() { } /// <summary> /// 构造函数 /// </summary> /// <param name="sImagePath">图片路径</param> public ASPJpegBase(string sImagePath) { oCurrentImage = new Bitmap(sImagePath); //如果原图片是索引像素格式之列的，则需要转换 if (IsPixelFormatIndexed(oCurrentImage.PixelFormat)) { using(Bitmap bmp = new Bitmap(oCurrentImage.Width, oCurrentImage.Height, PixelFormat.Format32bppArgb)) { using (Graphics g = Graphics.FromImage(bmp)) { g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic; g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality; g.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality; g.DrawImage(oCurrentImage, 0, 0); } oCurrentImage = (Bitmap)bmp.Clone(); } } } /// <summary> /// 构造函数 /// </summary> /// <param name="oImage">Image对象</param> public ASPJpegBase(Image oImage) { oCurrentImage = new Bitmap(oImage); } /// <summary> /// 实例化Bitmap对象 /// </summary> /// <param name="sImagePath">图片路径</param> public void Open(string sImagePath) { oCurrentImage = new Bitmap(sImagePath); } /// <summary> /// 判断图片的PixelFormat 是否在 引发异常的 PixelFormat 之中 /// 无法从带有索引像素格式的图像创建graphics对象 /// </summary> /// <param name="imgPixelFormat">原图片的PixelFormat</param> /// <returns></returns> private static bool IsPixelFormatIndexed(PixelFormat imgPixelFormat) { foreach (PixelFormat pf in indexedPixelFormats) { if (pf.Equals(imgPixelFormat)) return true; } return false; } /// <summary> /// 添加文字水印 /// </summary> /// <param name="text"></param> /// <param name="p"></param> /// <param name="fontcolor"></param> /// <param name="font"></param> public void DrawText(string sText, Font font, Color fontcolor, Point p, float rotate) { using (Graphics graphics = Graphics.FromImage(this.CurrentBitmap)) { if (rotate != 0) graphics.RotateTransform(rotate); graphics.SmoothingMode = SmoothingMode.HighQuality; graphics.DrawString(sText, font, new SolidBrush(fontcolor), (float)p.X, (float)p.Y); } } /// <summary> /// 添加文字水印-文字带背景 /// </summary> /// <param name="text"></param> /// <param name="p"></param> /// <param name="fontcolor"></param> /// <param name="font"></param> public void DrawText(string sText, Font font, Color fontcolor, Point p, float rotate, string sImagePath) { TextureBrush tb = new TextureBrush(Image.FromFile(sImagePath)); using (Graphics graphics = Graphics.FromImage(this.CurrentBitmap)) { if (rotate != 0) graphics.RotateTransform(rotate); graphics.SmoothingMode = SmoothingMode.HighQuality; graphics.DrawString(sText, font, tb, (float)p.X, (float)p.Y); } } /// <summary> /// 绘制边框 /// </summary> /// <param name="frameColor">边框颜色</param> /// <param name="frameWidth">边框宽度</param> public void DrawFrame(Color frameColor, int frameWidth) { double iNewframeWidth = (Convert.ToDouble(frameWidth) / Convert.ToDouble(2)); using (Bitmap newBitmap = new Bitmap(this.CurrentBitmap.Width + (2 * frameWidth), this.CurrentBitmap.Height + (2 * frameWidth))) { using (Graphics graphics = Graphics.FromImage(newBitmap)) { graphics.Clear(Color.White); Pen pen = new Pen(frameColor, frameWidth); graphics.DrawRectangle(pen, (float)iNewframeWidth, (float)iNewframeWidth, newBitmap.Width - frameWidth, newBitmap.Height - frameWidth); graphics.DrawImage(this.CurrentBitmap, new Rectangle(frameWidth, frameWidth,this.CurrentBitmap.Width,this.CurrentBitmap.Height)); this.oCurrentImage = ((Bitmap)newBitmap.Clone()); } } } /// <summary> /// 绘制3D边框 /// </summary> /// <param name="frameColor">边框颜色</param> /// <param name="frameWidth">边框宽度</param> public void Draw3DFrame(Color frameColor, int frameWidth) { double iNewframeWidth = (Convert.ToDouble(frameWidth) / Convert.ToDouble(2)); using (Bitmap newBitmap = new Bitmap(this.CurrentBitmap.Width + (2 * frameWidth), this.CurrentBitmap.Height + (2 * frameWidth))) { using (Graphics graphics = Graphics.FromImage(newBitmap)) { graphics.Clear(Color.White); Pen pen = new Pen(frameColor, (float)iNewframeWidth); Pen pen1 = new Pen(Color.FromArgb(frameColor.ToArgb() - 10), (float)iNewframeWidth); graphics.DrawRectangle(pen, (float)iNewframeWidth / 2, (float)iNewframeWidth / 2, newBitmap.Width - (float)iNewframeWidth, newBitmap.Height - (float)iNewframeWidth); graphics.DrawRectangle(pen1, 3 * (float)iNewframeWidth / 2, 3 * (float)iNewframeWidth / 2, newBitmap.Width - 3 * (float)iNewframeWidth, newBitmap.Height - 3 * (float)iNewframeWidth); graphics.DrawImage(this.CurrentBitmap, 2 * (float)iNewframeWidth, 2 * (float)iNewframeWidth, (float)this.CurrentBitmap.Width, (float)this.CurrentBitmap.Height); this.oCurrentImage = (Bitmap)newBitmap.Clone(); } } } /// <summary> /// 图片切割功能 /// </summary> /// <param name="left">left</param> /// <param name="top">top</param> /// <param name="right">right</param> /// <param name="bottom">bottom</param> public void Crop(int left, int top, int right, int bottom) { int num; int num2; if ((this.CurrentBitmap.Width - left) < right) { num = this.CurrentBitmap.Width - right; } else { num = right; } if ((this.CurrentBitmap.Height - top) < bottom) { num2 = this.CurrentBitmap.Height - top; } else { num2 = bottom; } using (Bitmap image = new Bitmap(num, num2)) { image.SetResolution(this.CurrentBitmap.HorizontalResolution, this.CurrentBitmap.VerticalResolution); using (Graphics graphics = Graphics.FromImage(image)) { graphics.Clear(Color.White); graphics.SmoothingMode = SmoothingMode.HighQuality; graphics.DrawImage(this.CurrentBitmap, new Rectangle(0, 0, num, num2), new Rectangle(left, top, num, num2), GraphicsUnit.Pixel); oCurrentImage = (Bitmap)image.Clone(); } } } /// <summary> /// 图片移动 /// </summary> /// <param name="lefttopx"></param> /// <param name="lefttopy"></param> /// <param name="rightbottomx"></param> /// <param name="rightbottomy"></param> /// <param name="tox"></param> /// <param name="toy"></param> public void Move(int lefttopx, int lefttopy, int rightbottomx, int rightbottomy, int tox, int toy) { using (Bitmap image = this.Copy(lefttopx, lefttopy, rightbottomx, rightbottomy)) { Rectangle rect = GetRectangle(lefttopx, lefttopy, rightbottomx, rightbottomy); using (Graphics graphics = Graphics.FromImage(this.CurrentBitmap)) { graphics.Clear(Color.White); graphics.FillRectangle(new SolidBrush(Color.White), rect); graphics.DrawImage(image, tox, toy); oCurrentImage = (Bitmap)image.Clone(); } } } /// <summary> /// 调整图片大小 /// </summary> /// <param name="width"></param> /// <param name="height"></param> public void ResizeTo(int width, int height) { this.oCurrentImage = new Bitmap(this.CurrentBitmap, width, height); } /// <summary> /// 生成缩略图 /// </summary> public void CreateThumbnail(int iWidth, int iHeight) { //用指定的大小和格式初始化 Bitmap 类的新实例 using (Bitmap bitmap = (Bitmap)oCurrentImage.Clone()) { ResizeTo(iWidth, iHeight); //在指定位置并且按指定大小绘制 原图片 对象 Graphics.FromImage(oCurrentImage).DrawImage(bitmap, new Rectangle(0, 0, iWidth, iHeight)); } } /// <summary> /// 生成缩略图 /// </summary> /// <param name="sThumbnailPath">缩略图保存路径</param> public void CreateThumbnail(string sThumbnailPath) { if (Width > 0 && Height > 0 && (Width < oCurrentImage.Width || Height < oCurrentImage.Height)) { int width = Width; int height = Height; double factor = 1; if (oCurrentImage.Width > oCurrentImage.Height) { factor = Convert.ToDouble(width) / Convert.ToDouble(oCurrentImage.Width); height = Convert.ToInt32(oCurrentImage.Height * factor); } else { factor = Convert.ToDouble(height) / Convert.ToDouble(oCurrentImage.Height); width = Convert.ToInt32(oCurrentImage.Width * factor); } //用指定的大小和格式初始化 Bitmap 类的新实例 Bitmap bitmap = new Bitmap(width, height, PixelFormat.Format32bppArgb); //从指定的 Image 对象创建新 Graphics 对象 Graphics graphics = Graphics.FromImage(bitmap); //清除整个绘图面并以透明背景色填充 graphics.Clear(Color.Transparent); //在指定位置并且按指定大小绘制 原图片 对象 graphics.DrawImage(oCurrentImage, new Rectangle(0, 0, width, height)); try { bitmap.Save(sThumbnailPath); } catch (System.Exception e) { throw e; } finally { bitmap.Dispose(); graphics.Dispose(); } } } /// <summary> /// 图片垂直翻转 /// </summary> public void FlipV() { this.CurrentBitmap.RotateFlip(RotateFlipType.RotateNoneFlipX); } /// <summary> /// 图片水平翻转 /// </summary> public void FlipH() { this.CurrentBitmap.RotateFlip(RotateFlipType.RotateNoneFlipY); } /// <summary> /// 图片旋转 /// </summary> /// <param name="angle">旋转度数</param> public void Rotate(int angle) { angle = angle % 360; if (angle < 0) { angle += 360; } if (angle >= 270) { this.CurrentBitmap.RotateFlip(RotateFlipType.Rotate270FlipNone); angle -= 270; } else if (angle >= 180) { this.CurrentBitmap.RotateFlip(RotateFlipType.Rotate180FlipNone); angle -= 180; } else if (angle >= 90) { this.CurrentBitmap.RotateFlip(RotateFlipType.Rotate90FlipNone); angle -= 90; } if (angle > 0) { double a = (angle * 3.1415926535897931) / 180.0; int width = Convert.ToInt32((double)((this.CurrentBitmap.Height * Math.Sin(a)) + (this.CurrentBitmap.Width * Math.Cos(a)))); int height = Convert.ToInt32((double)((this.CurrentBitmap.Width * Math.Sin(a)) + (this.CurrentBitmap.Height * Math.Cos(a)))); Bitmap image = new Bitmap(width, height * 2); image.SetResolution(this.CurrentBitmap.HorizontalResolution, this.CurrentBitmap.VerticalResolution); Graphics graphics = Graphics.FromImage(image); graphics.Clear(Color.White); Matrix matrix = new Matrix(1f, 0f, 0f, -1f, 0f, 0f); matrix.Translate(0f, (float)this.CurrentBitmap.Height, MatrixOrder.Append); graphics.Transform = matrix; Matrix matrix2 = new Matrix(); matrix2.RotateAt((float)-angle, (PointF)new Point(0, 0), MatrixOrder.Append); matrix2.Translate(0f, 0f, MatrixOrder.Append); GraphicsPath path = new GraphicsPath(); Point[] points = new Point[] { new Point(0, this.CurrentBitmap.Height), new Point(this.CurrentBitmap.Width, this.CurrentBitmap.Height), new Point(0, 0) }; path.AddPolygon(points); path.Transform(matrix2); PointF[] pathPoints = path.PathPoints; graphics.DrawImage(this.CurrentBitmap, pathPoints); graphics.ResetTransform(); int num4 = this.CurrentBitmap.Height; this.oCurrentImage = new Bitmap(width, height); this.CurrentBitmap.SetResolution(image.HorizontalResolution, image.VerticalResolution); using (Graphics newGraphics = Graphics.FromImage(this.CurrentBitmap)) { newGraphics.Clear(Color.White); newGraphics.DrawImage(image, new Rectangle(0, 0, width, height), new Rectangle(0, Convert.ToInt32((double)(num4 * (1.0 - Math.Cos(a)))), width, height), GraphicsUnit.Pixel); image.Dispose(); graphics.Dispose(); path.Dispose(); } } } /// <summary> /// 画弧形 /// </summary> /// <param name="r"></param> /// <param name="linewidth"></param> /// <param name="linecolor"></param> /// <param name="startangle"></param> /// <param name="sweepAngle"></param> public void DrawArc(Rectangle r, int linewidth, Color linecolor, float startangle, float sweepAngle) { using (Graphics graphics = Graphics.FromImage(this.CurrentBitmap)) { Pen pen = new Pen(linecolor, (float)linewidth); graphics.DrawArc(pen, r, startangle, sweepAngle); } } /// <summary> /// 画椭圆 /// </summary> /// <param name="r"></param> /// <param name="linewidth"></param> /// <param name="linecolor"></param> /// <param name="fillcolor"></param> public void DrawEllipse(Rectangle r, int linewidth, Color linecolor, Color fillcolor) { using (Graphics graphics = Graphics.FromImage(this.CurrentBitmap)) { Pen pen = new Pen(linecolor, (float)linewidth); graphics.DrawEllipse(pen, r); if (fillcolor != Color.Empty) { graphics.FillEllipse(new SolidBrush(fillcolor), r); } } } /// <summary> /// 画椭圆 /// </summary> /// <param name="lefttop"></param> /// <param name="rightbottom"></param> /// <param name="linewidth"></param> /// <param name="linecolor"></param> /// <param name="fillcolor"></param> public void DrawEllipse(Point lefttop, Point rightbottom, int linewidth, Color linecolor, Color fillcolor) { this.DrawEllipse(new Rectangle(lefttop.X, lefttop.Y, rightbottom.X - lefttop.X, rightbottom.Y - lefttop.Y), linewidth, linecolor, fillcolor); } /// <summary> /// 画椭圆 /// </summary> /// <param name="lefttopx"></param> /// <param name="lefttopy"></param> /// <param name="rightbottomx"></param> /// <param name="rightbottomy"></param> /// <param name="linewidth"></param> /// <param name="linecolor"></param> /// <param name="fillcolor"></param> public void DrawEllipse(int lefttopx, int lefttopy, int rightbottomx, int rightbottomy, int linewidth, Color linecolor, Color fillcolor) { this.DrawEllipse(new Rectangle(lefttopx, lefttopy, rightbottomx - lefttopx, rightbottomy - lefttopy), linewidth, linecolor, fillcolor); } /// <summary> /// 画图上图 /// </summary> /// <param name="img"></param> /// <param name="r"></param> public void DrawImage(System.Drawing.Image img, Rectangle r) { Graphics.FromImage(this.CurrentBitmap).DrawImage(img, r); } /// <summary> /// 画线 /// </summary> /// <param name="pFrom"></param> /// <param name="pTo"></param> /// <param name="linewidth"></param> /// <param name="linecolor"></param> public void DrawLine(Point pFrom, Point pTo, int linewidth, Color linecolor) { using (Graphics graphics = Graphics.FromImage(this.CurrentBitmap)) { Pen pen = new Pen(linecolor, (float)linewidth); graphics.DrawLine(pen, pFrom, pTo); } } /// <summary> /// 画线 /// </summary> /// <param name="fromx"></param> /// <param name="fromy"></param> /// <param name="tox"></param> /// <param name="toy"></param> /// <param name="linewidth"></param> /// <param name="linecolor"></param> public void DrawLine(int fromx, int fromy, int tox, int toy, int linewidth, Color linecolor) { this.DrawLine(new Point(fromx, fromy), new Point(tox, toy), linewidth, linecolor); } /// <summary> /// 画多条线 /// </summary> /// <param name="points"></param> /// <param name="linewidth"></param> /// <param name="linecolor"></param> public void DrawLines(Point[] points, int linewidth, Color linecolor) { using (Graphics graphics = Graphics.FromImage(this.CurrentBitmap)) { Pen pen = new Pen(linecolor, (float)linewidth); graphics.DrawLines(pen, points); } } /// <summary> /// 画长方形 /// </summary> /// <param name="r"></param> /// <param name="linewidth"></param> /// <param name="linecolor"></param> /// <param name="fillcolor"></param> public void DrawRectangle(Rectangle r, int linewidth, Color linecolor, Color fillcolor) { using (Graphics graphics = Graphics.FromImage(this.CurrentBitmap)) { Pen pen = new Pen(linecolor, (float)linewidth); graphics.DrawRectangle(pen, r); if (fillcolor != Color.Empty) { graphics.FillRectangle(new SolidBrush(fillcolor), r); } } } /// <summary> /// 画长方形 /// </summary> /// <param name="lefttop"></param> /// <param name="rightbottom"></param> /// <param name="linewidth"></param> /// <param name="linecolor"></param> /// <param name="fillcolor"></param> public void DrawRectangle(Point lefttop, Point rightbottom, int linewidth, Color linecolor, Color fillcolor) { this.DrawRectangle(new Rectangle(lefttop.X, lefttop.Y, rightbottom.X - lefttop.X, rightbottom.Y - lefttop.Y), linewidth, linecolor, fillcolor); } /// <summary> /// 画长方形 /// </summary> /// <param name="lefttopx"></param> /// <param name="lefttopy"></param> /// <param name="rightbottomx"></param> /// <param name="rightbottomy"></param> /// <param name="linewidth"></param> /// <param name="linecolor"></param> /// <param name="fillcolor"></param> public void DrawRectangle(int lefttopx, int lefttopy, int rightbottomx, int rightbottomy, int linewidth, Color linecolor, Color fillcolor) { this.DrawRectangle(GetRectangle(lefttopx, lefttopy, rightbottomx, rightbottomy), linewidth, linecolor, fillcolor); } /// <summary> /// 保存图片到内存中 /// </summary> /// <param name="mms"></param> /// <param name="RawFormat"></param> public void Save(MemoryStream mms, ImageFormat RawFormat) { this.CurrentBitmap.Save(mms, RawFormat); } /// <summary> /// 保存图片到文件流中 /// </summary> /// <param name="mms"></param> /// <param name="RawFormat"></param> public void Save(Stream mms, ImageFormat RawFormat) { this.CurrentBitmap.Save(mms, RawFormat); } /// <summary> /// 保存为Gif图片 /// </summary> /// <param name="sSavePath"></param> public void SaveGif(string sSavePath) { this.CurrentBitmap.Save(sSavePath, ImageFormat.Gif); } /// <summary> /// 保存为jpg图片 /// </summary> /// <param name="sSavePath"></param> /// <param name="iQuantity">图片质量</param> public void SaveJpeg(string sSavePath, int iQuantity) { ImageCodecInfo encoderInfo = GetEncoderInfo("image/jpeg"); EncoderParameters encoderParams = new EncoderParameters(1); encoderParams = new EncoderParameters(); encoderParams.Param[0] = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, (long)iQuantity); this.CurrentBitmap.Save(sSavePath, encoderInfo, encoderParams); encoderParams.Dispose(); } /// <summary> /// 保存为jpg图片 /// </summary> /// <param name="sSavePath"></param> /// <param name="iQuantity">图片质量</param> public void SaveJpeg(Stream etStream, int iQuantity) { ImageCodecInfo encoderInfo = GetEncoderInfo("image/jpeg"); EncoderParameters encoderParams = new EncoderParameters(1); encoderParams = new EncoderParameters(); encoderParams.Param[0] = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, (long)iQuantity); this.CurrentBitmap.Save(etStream, encoderInfo, encoderParams); encoderParams.Dispose(); } /// <summary> /// 保存为jpg图片 /// </summary> /// <param name="sSavePath"></param> public void SaveJpeg(string sSavePath) { this.CurrentBitmap.Save(sSavePath, ImageFormat.Jpeg); } /// <summary> /// 保存为png图片 /// </summary> /// <param name="sSavePath"></param> public void SavePNG(string sSavePath) { this.CurrentBitmap.Save(sSavePath, ImageFormat.Png); } /// <summary> /// 保存当前图片对象，自动根据后缀名，保存图片。 /// </summary> /// <param name="sSavePath"></param> public void Save(string sSavePath) { if (sSavePath.EndsWith(".jpg")) { this.SaveJpeg(sSavePath, 80); } else if (sSavePath.EndsWith(".gif")) { this.SaveGif(sSavePath); } else if (sSavePath.EndsWith(".png")) { this.SavePNG(sSavePath); } else { this.CurrentBitmap.Save(sSavePath); } } /// <summary> /// 复制图片对象 /// </summary> /// <param name="lefttopx"></param> /// <param name="lefttopy"></param> /// <param name="rightbottomx"></param> /// <param name="rightbottomy"></param> /// <returns></returns> public Bitmap Copy(int lefttopx, int lefttopy, int rightbottomx, int rightbottomy) { Rectangle srcRect = GetRectangle(lefttopx, lefttopy, rightbottomx, rightbottomy); using (Bitmap image = new Bitmap(srcRect.Width, srcRect.Height)) { image.SetResolution(this.oCurrentImage.HorizontalResolution, this.oCurrentImage.VerticalResolution); Graphics.FromImage(image).DrawImage(this.oCurrentImage, new Rectangle(1, 1, image.Width, image.Height), srcRect, GraphicsUnit.Pixel); return (Bitmap)image.Clone(); } } /// <summary> /// 获取校正后的长方形 /// </summary> /// <param name="lefttopx"></param> /// <param name="lefttopy"></param> /// <param name="rightbottomx"></param> /// <param name="rightbottomy"></param> /// <returns></returns> public static Rectangle GetRectangle(int lefttopx, int lefttopy, int rightbottomx, int rightbottomy) { if ((lefttopx >= rightbottomx) && (lefttopy >= rightbottomy)) { return new Rectangle(rightbottomx, rightbottomy, lefttopx - rightbottomx, lefttopy - rightbottomy); } if ((lefttopx < rightbottomx) && (lefttopy >= rightbottomy)) { return new Rectangle(lefttopx, rightbottomy, rightbottomx - lefttopx, lefttopy - rightbottomy); } if ((lefttopx >= rightbottomx) && (lefttopy < rightbottomy)) { return new Rectangle(rightbottomx, lefttopy, lefttopx - rightbottomx, rightbottomy - lefttopy); } return new Rectangle(lefttopx, lefttopy, rightbottomx - lefttopx, rightbottomy - lefttopy); } /// <summary> /// 获取编码信息 /// </summary> /// <param name="mimeType"></param> /// <returns></returns> public static ImageCodecInfo GetEncoderInfo(string mimeType) { foreach (ImageCodecInfo info in ImageCodecInfo.GetImageEncoders()) { if (info.MimeType == mimeType) { return info; } } return null; } /// <summary> /// 清空对象 /// </summary> public void Dispose() { if (oCurrentImage != null) oCurrentImage.Dispose(); GC.SuppressFinalize(this); } }
}