图形图像处理

开发平台：
C#

ImageManager.cs：源码内容
							using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;
using System.Drawing.Imaging;
using System.Drawing.Drawing2D;
using System.IO;
using System.Text.RegularExpressions;
namespace MyImageManger
{
    class ImageManager
    {
        public static List<string> imgFileList = new List<string>();
        public static int curImg = 0;
        public void PicSized(string picPath, string reSizePicPath, int iSize, ImageFormat format)
        {
            Bitmap originBmp = new Bitmap(picPath);
            int w = originBmp.Width * iSize;
            int h = originBmp.Height * iSize;
            Bitmap resizedBmp = new Bitmap(w, h);
            Graphics g = Graphics.FromImage(resizedBmp);
            //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;
            g.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
            //消除锯齿 
            g.SmoothingMode = SmoothingMode.AntiAlias;
            g.DrawImage(originBmp, new Rectangle(0, 0, w, h), new Rectangle(0, 0, originBmp.Width, originBmp.Height), GraphicsUnit.Pixel);
            resizedBmp.Save(reSizePicPath, format);
            g.Dispose();
            resizedBmp.Dispose();
            originBmp.Dispose();
        }
        /// <summary>
        /// Resize图片
        /// </summary>
        /// <param name="bmp">原始Bitmap</param>
        /// <param name="newW">新的宽度</param>
        /// <param name="newH">新的高度</param>
        /// <param name="Mode">保留着，暂时未用</param>
        /// <returns>处理以后的图片</returns>
        public static Bitmap KiResizeImage(Bitmap bmp, int newW, int newH, int Mode)
        {
            try
            {
                Bitmap b = new Bitmap(newW, newH);
                Graphics g = Graphics.FromImage(b);
                // 插值算法的质量
                g.InterpolationMode = InterpolationMode.HighQualityBicubic;
                g.DrawImage(bmp, new Rectangle(0, 0, newW, newH), new Rectangle(0, 0, bmp.Width, bmp.Height), GraphicsUnit.Pixel);
                g.Dispose();
                return b;
            }
            catch
            {
                return null;
            }
        }
        // ===============================
        /// <summary>
        /// 剪裁 -- 用GDI+
        /// </summary>
        /// <param name="b">原始Bitmap</param>
        /// <param name="StartX">开始坐标X</param>
        /// <param name="StartY">开始坐标Y</param>
        /// <param name="iWidth">宽度</param>
        /// <param name="iHeight">高度</param>
        /// <returns>剪裁后的Bitmap</returns>
        public static Bitmap KiCut(Bitmap b, int StartX, int StartY, int iWidth, int iHeight)
        {
            if (b == null)
            {
                return null;
            }
            int w = b.Width;
            int h = b.Height;
            if (StartX >= w || StartY >= h)
            {
                return null;
            }
            if (StartX + iWidth > w)
            {
                iWidth = w - StartX;
            }
            if (StartY + iHeight > h)
            {
                iHeight = h - StartY;
            }
            try
            {
                Bitmap bmpOut = new Bitmap(iWidth, iHeight, PixelFormat.Format24bppRgb);
                Graphics g = Graphics.FromImage(bmpOut);
                g.DrawImage(b, new Rectangle(0, 0, iWidth, iHeight), new Rectangle(StartX, StartY, iWidth, iHeight), GraphicsUnit.Pixel);
                g.Dispose();
                return bmpOut;
            }
            catch
            {
                return null;
            }
        }
                    /// <summary>
        /// 任意角度旋转
        /// </summary>
        /// <param name="bmp">原始图Bitmap</param>
        /// <param name="angle">旋转角度</param>
        /// <param name="bkColor">背景色</param>
        /// <returns>输出Bitmap</returns>
        public static Bitmap KiRotate(Bitmap bmp, float angle, Color bkColor)
        {
            int w = bmp.Width + 2;
            int h = bmp.Height + 2;
             PixelFormat pf;
            if (bkColor == Color.Transparent)
            {
                 pf = PixelFormat.Format32bppArgb;
             }
            else
            {
                 pf = bmp.PixelFormat;
            }
             Bitmap tmp = new Bitmap(w, h, pf);
             Graphics g = Graphics.FromImage(tmp);
             g.Clear(bkColor);
             g.DrawImageUnscaled(bmp, 1, 1);
             g.Dispose();
             GraphicsPath path = new GraphicsPath();
             path.AddRectangle(new RectangleF(0f, 0f, w, h));
             Matrix mtrx = new Matrix();
             mtrx.Rotate(angle);
             RectangleF rct = path.GetBounds(mtrx);
             Bitmap dst = new Bitmap((int)rct.Width, (int)rct.Height, pf);
             g = Graphics.FromImage(dst);
             g.Clear(bkColor);
             g.TranslateTransform(-rct.X, -rct.Y);
             g.RotateTransform(angle);
             g.InterpolationMode = InterpolationMode.HighQualityBilinear;
             g.DrawImageUnscaled(tmp, 0, 0);
             g.Dispose();
             tmp.Dispose();
            return dst;
         }
        /// <summary>
        /// 获得文件所在文件夹的所有图片列表，并标记当前的图片位置
        /// </summary>
        /// <param name="filepath">打开文件的地址</param>
        /// <returns></returns>
        public static List<string> GetALLFile(string filepath)
        {
            imgFileList.Clear();
            DirectoryInfo fileFile = new DirectoryInfo(filepath);
            string dicpath = fileFile.Parent.FullName;
            DirectoryInfo dicFile = new DirectoryInfo(dicpath);
            string[] fileNameArray =  Directory.GetFiles(dicpath);
            Regex reg = new Regex(@"([A-Z]:\[^/:*?<>|]+.(jpg|JPG|PNG|png|BMP|bmp|ICO|ico)$)");
            for (int i = 0; i < fileNameArray.Length; i++)
            {
                if( reg.Match(fileNameArray[i]).Success)
                {
                    imgFileList.Add(fileNameArray[i]);
                    if(fileNameArray[i] == filepath)
                    {
                        curImg = imgFileList.Count - 1;
                    }
                }
            } 
            return imgFileList;
        }
    }
}

						