using System;

using System.Collections.Generic;

using System.Drawing;

using System.Drawing.Drawing2D;

using System.Drawing.Imaging;

using System.IO;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Web;

namespace Planet.OrcaPos.Common

{

    public class ValidateCode

    {

        //需要导入System.Web与System.Drawing

        public ValidateCode()

        {

        }

        /// <summary>

        /// 验证码的最大长度

        /// </summary>

        public int MaxLength

        {

            get { return 10; }

        }

        /// <summary>

        /// 验证码的最小长度

        /// </summary>

        public int MinLength

        {

            get { return 1; }

        }

        /// <summary>

        /// 生成验证码

        /// </summary>

        /// <param name="length">指定验证码的长度</param>

        /// <returns></returns>

        public string CreateValidateCode(int length)

        {

            int[] randMembers = new int[length];

            int[] validateNums = new int[length];

            string validateNumberStr = "";

            //生成起始序列值

            int seekSeek = unchecked((int)DateTime.Now.Ticks);

            Random seekRand = new Random(seekSeek);

            int beginSeek = (int)seekRand.Next(0, Int32.MaxValue - length * 10000);

            int[] seeks = new int[length];

            for (int i = 0; i < length; i++)

            {

                beginSeek += 10000;

                seeks[i] = beginSeek;

            }

            //生成随机数字

            for (int i = 0; i < length; i++)

            {

                Random rand = new Random(seeks[i]);

                int pownum = 1 * (int)Math.Pow(10, length);

                randMembers[i] = rand.Next(pownum, Int32.MaxValue);

            }

            //抽取随机数字

            for (int i = 0; i < length; i++)

            {

                string numStr = randMembers[i].ToString();

                int numLength = numStr.Length;

                Random rand = new Random();

                int numPosition = rand.Next(0, numLength - 1);

                validateNums[i] = Int32.Parse(numStr.Substring(numPosition, 1));

            }

            //生成验证码

            for (int i = 0; i < length; i++)

            {

                validateNumberStr += validateNums[i].ToString();

            }

            return validateNumberStr;

        }

        /// <summary>

        /// 创建验证码的图片

        /// </summary>

        /// <param name="containsPage">要输出到的page对象</param>

        /// <param name="validateNum">验证码</param>

        public void CreateValidateGraphic(string validateCode, HttpContext context)

        {

            Bitmap image = new Bitmap((int)Math.Ceiling(validateCode.Length * 12.0), 22);

            Graphics g = Graphics.FromImage(image);

            try

            {

                //生成随机生成器

                Random random = new Random();

                //清空图片背景色

                g.Clear(Color.White);

                //画图片的干扰线

                for (int i = 0; i < 25; i++)

                {

                    int x1 = random.Next(image.Width);

                    int x2 = random.Next(image.Width);

                    int y1 = random.Next(image.Height);

                    int y2 = random.Next(image.Height);

                    g.DrawLine(new Pen(Color.Silver), x1, y1, x2, y2);

                }

                Font font = new Font("Arial", 12, (FontStyle.Bold | FontStyle.Italic));

                //渐变.

                LinearGradientBrush brush = new LinearGradientBrush(new Rectangle(0, 0, image.Width, image.Height),

                 Color.Blue, Color.DarkRed, 1.2f, true);

                g.DrawString(validateCode, font, brush, 3, 2);

                //画图片的前景干扰点

                for (int i = 0; i < 100; i++)

                {

                    int x = random.Next(image.Width);

                    int y = random.Next(image.Height);

                    image.SetPixel(x, y, Color.FromArgb(random.Next()));

                }

                //画图片的边框线

                g.DrawRectangle(new Pen(Color.Silver), 0, 0, image.Width - 1, image.Height - 1);

                //保存图片数据

                MemoryStream stream = new MemoryStream();

                image.Save(stream, ImageFormat.Jpeg);

                //输出图片流

                context.Response.Clear();

                context.Response.ContentType = "image/jpeg";

                context.Response.BinaryWrite(stream.ToArray());

            }

            finally

            {

                g.Dispose();

                image.Dispose();

            }

        }

        /// <summary>

        /// 得到验证码图片的长度

        /// </summary>

        /// <param name="validateNumLength">验证码的长度</param>

        /// <returns></returns>

        public static int GetImageWidth(int validateNumLength)

        {

            return (int)(validateNumLength * 12.0);

        }

        /// <summary>

        /// 得到验证码的高度

        /// </summary>

        /// <returns></returns>

        public static double GetImageHeight()

        {

            return 22.5;

        }

    }

}

using System;

using System.Collections;

using System.IO;

using System.Drawing;

using System.Drawing.Imaging;

using System.Drawing.Drawing2D;

namespace Planet.OrcaPos.Common

{

    public class ImageClass

    {

        //需要导入System.Drawing

        public ImageClass()

        { }

        #region 缩略图

        /// <summary>

        /// 生成缩略图

        /// </summary>

        /// <param name="originalImagePath">源图路径（物理路径）</param>

        /// <param name="thumbnailPath">缩略图路径（物理路径）</param>

        /// <param name="width">缩略图宽度</param>

        /// <param name="height">缩略图高度</param>

        /// <param name="mode">生成缩略图的方式</param>

        public static void MakeThumbnail(string originalImagePath, string thumbnailPath, int width, int height, string mode)

        {

            System.Drawing.Image originalImage = System.Drawing.Image.FromFile(originalImagePath);

            int towidth = width;

            int toheight = height;

            int x = 0;

            int y = 0;

            int ow = originalImage.Width;

            int oh = originalImage.Height;

            switch (mode)

            {

                case "HW":  //指定高宽缩放（可能变形）

                    break;

                case "W":   //指定宽，高按比例

                    toheight = originalImage.Height * width / originalImage.Width;

                    break;

                case "H":   //指定高，宽按比例

                    towidth = originalImage.Width * height / originalImage.Height;

                    break;

                case "Cut": //指定高宽裁减（不变形）

                    if ((double)originalImage.Width / (double)originalImage.Height > (double)towidth / (double)toheight)

                    {

                        oh = originalImage.Height;

                        ow = originalImage.Height * towidth / toheight;

                        y = 0;

                        x = (originalImage.Width - ow) / 2;

                    }

                    else

                    {

                        ow = originalImage.Width;

                        oh = originalImage.Width * height / towidth;

                        x = 0;

                        y = (originalImage.Height - oh) / 2;

                    }

                    break;

                default:

                    break;

            }

            //新建一个bmp图片

            System.Drawing.Image bitmap = new System.Drawing.Bitmap(towidth, toheight);

            //新建一个画板

            System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bitmap);

            //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;

            //清空画布并以透明背景色填充

            g.Clear(System.Drawing.Color.Transparent);

            //在指定位置并且按指定大小绘制原图片的指定部分

            //第一个：对哪张图片进行操作。

            //二：画多么大。

            //三：画那块区域。

            g.DrawImage(originalImage, new System.Drawing.Rectangle(0, 0, towidth, toheight), new System.Drawing.Rectangle(x, y, ow, oh), System.Drawing.GraphicsUnit.Pixel);

            try

            {

                //以jpg格式保存缩略图

                bitmap.Save(thumbnailPath, System.Drawing.Imaging.ImageFormat.Jpeg);

            }

            catch (System.Exception e)

            {

                throw e;

            }

            finally

            {

                originalImage.Dispose();

                bitmap.Dispose();

                g.Dispose();

            }

        }

        #endregion

        #region 图片水印

        /// <summary>

        /// 图片水印处理方法

        /// </summary>

        /// <param name="path">需要加载水印的图片路径（绝对路径）</param>

        /// <param name="waterpath">水印图片（绝对路径）</param>

        /// <param name="location">水印位置（传送正确的代码）</param>

        public static string ImageWatermark(string path, string waterpath, string location)

        {

            string kz_name = Path.GetExtension(path);

            if (kz_name == ".jpg" || kz_name == ".bmp" || kz_name == ".jpeg")

            {

                DateTime time = DateTime.Now;

                string filename = "" + time.Year.ToString() + time.Month.ToString() + time.Day.ToString() + time.Hour.ToString() + time.Minute.ToString() + time.Second.ToString() + time.Millisecond.ToString();

                Image img = Bitmap.FromFile(path);

                Image waterimg = Image.FromFile(waterpath);

                Graphics g = Graphics.FromImage(img);

                ArrayList loca = GetLocation(location, img, waterimg);

                g.DrawImage(waterimg, new Rectangle(int.Parse(loca[0].ToString()), int.Parse(loca[1].ToString()), waterimg.Width, waterimg.Height));

                waterimg.Dispose();

                g.Dispose();

                string newpath = Path.GetDirectoryName(path) + filename + kz_name;

                img.Save(newpath);

                img.Dispose();

                File.Copy(newpath, path, true);

                if (File.Exists(newpath))

                {

                    File.Delete(newpath);

                }

            }

            return path;

        }

        /// <summary>

        /// 图片水印位置处理方法

        /// </summary>

        /// <param name="location">水印位置</param>

        /// <param name="img">需要添加水印的图片</param>

        /// <param name="waterimg">水印图片</param>

        private static ArrayList GetLocation(string location, Image img, Image waterimg)

        {

            ArrayList loca = new ArrayList();

            int x = 0;

            int y = 0;

            if (location == "LT")

            {

                x = 10;

                y = 10;

            }

            else if (location == "T")

            {

                x = img.Width / 2 - waterimg.Width / 2;

                y = img.Height - waterimg.Height;

            }

            else if (location == "RT")

            {

                x = img.Width - waterimg.Width;

                y = 10;

            }

            else if (location == "LC")

            {

                x = 10;

                y = img.Height / 2 - waterimg.Height / 2;

            }

            else if (location == "C")

            {

                x = img.Width / 2 - waterimg.Width / 2;

                y = img.Height / 2 - waterimg.Height / 2;

            }

            else if (location == "RC")

            {

                x = img.Width - waterimg.Width;

                y = img.Height / 2 - waterimg.Height / 2;

            }

            else if (location == "LB")

            {

                x = 10;

                y = img.Height - waterimg.Height;

            }

            else if (location == "B")

            {

                x = img.Width / 2 - waterimg.Width / 2;

                y = img.Height - waterimg.Height;

            }

            else

            {

                x = img.Width - waterimg.Width;

                y = img.Height - waterimg.Height;

            }

            loca.Add(x);

            loca.Add(y);

            return loca;

        }

        #endregion

        #region 文字水印

        /// <summary>

        /// 文字水印处理方法

        /// </summary>

        /// <param name="path">图片路径（绝对路径）</param>

        /// <param name="size">字体大小</param>

        /// <param name="letter">水印文字</param>

        /// <param name="color">颜色</param>

        /// <param name="location">水印位置</param>

        public static string LetterWatermark(string path, int size, string letter, Color color, string location)

        {

            #region

            string kz_name = Path.GetExtension(path);

            if (kz_name == ".jpg" || kz_name == ".bmp" || kz_name == ".jpeg")

            {

                DateTime time = DateTime.Now;

                string filename = "" + time.Year.ToString() + time.Month.ToString() + time.Day.ToString() + time.Hour.ToString() + time.Minute.ToString() + time.Second.ToString() + time.Millisecond.ToString();

                Image img = Bitmap.FromFile(path);

                Graphics gs = Graphics.FromImage(img);

                ArrayList loca = GetLocation(location, img, size, letter.Length);

                Font font = new Font("宋体", size);

                Brush br = new SolidBrush(color);

                gs.DrawString(letter, font, br, float.Parse(loca[0].ToString()), float.Parse(loca[1].ToString()));

                gs.Dispose();

                string newpath = Path.GetDirectoryName(path) + filename + kz_name;

                img.Save(newpath);

                img.Dispose();

                File.Copy(newpath, path, true);

                if (File.Exists(newpath))

                {

                    File.Delete(newpath);

                }

            }

            return path;

            #endregion

        }

        /// <summary>

        /// 文字水印位置的方法

        /// </summary>

        /// <param name="location">位置代码</param>

        /// <param name="img">图片对象</param>

        /// <param name="width">宽(当水印类型为文字时,传过来的就是字体的大小)</param>

        /// <param name="height">高(当水印类型为文字时,传过来的就是字符的长度)</param>

        private static ArrayList GetLocation(string location, Image img, int width, int height)

        {

            #region

            ArrayList loca = new ArrayList();  //定义数组存储位置

            float x = 10;

            float y = 10;

            if (location == "LT")

            {

                loca.Add(x);

                loca.Add(y);

            }

            else if (location == "T")

            {

                x = img.Width / 2 - (width * height) / 2;

                loca.Add(x);

                loca.Add(y);

            }

            else if (location == "RT")

            {

                x = img.Width - width * height;

            }

            else if (location == "LC")

            {

                y = img.Height / 2;

            }

            else if (location == "C")

            {

                x = img.Width / 2 - (width * height) / 2;

                y = img.Height / 2;

            }

            else if (location == "RC")

            {

                x = img.Width - height;

                y = img.Height / 2;

            }

            else if (location == "LB")

            {

                y = img.Height - width - 5;

            }

            else if (location == "B")

            {

                x = img.Width / 2 - (width * height) / 2;

                y = img.Height - width - 5;

            }

            else

            {

                x = img.Width - width * height;

                y = img.Height - width - 5;

            }

            loca.Add(x);

            loca.Add(y);

            return loca;

            #endregion

        }

        #endregion

        #region 调整光暗

        /// <summary>

        /// 调整光暗

        /// </summary>

        /// <param name="mybm">原始图片</param>

        /// <param name="width">原始图片的长度</param>

        /// <param name="height">原始图片的高度</param>

        /// <param name="val">增加或减少的光暗值</param>

        public Bitmap LDPic(Bitmap mybm, int width, int height, int val)

        {

            Bitmap bm = new Bitmap(width, height);//初始化一个记录经过处理后的图片对象

            int x, y, resultR, resultG, resultB;//x、y是循环次数，后面三个是记录红绿蓝三个值的

            Color pixel;

            for (x = 0; x < width; x++)

            {

                for (y = 0; y < height; y++)

                {

                    pixel = mybm.GetPixel(x, y);//获取当前像素的值

                    resultR = pixel.R + val;//检查红色值会不会超出[0, 255]

                    resultG = pixel.G + val;//检查绿色值会不会超出[0, 255]

                    resultB = pixel.B + val;//检查蓝色值会不会超出[0, 255]

                    bm.SetPixel(x, y, Color.FromArgb(resultR, resultG, resultB));//绘图

                }

            }

            return bm;

        }

        #endregion

        #region 反色处理

        /// <summary>

        /// 反色处理

        /// </summary>

        /// <param name="mybm">原始图片</param>

        /// <param name="width">原始图片的长度</param>

        /// <param name="height">原始图片的高度</param>

        public Bitmap RePic(Bitmap mybm, int width, int height)

        {

            Bitmap bm = new Bitmap(width, height);//初始化一个记录处理后的图片的对象

            int x, y, resultR, resultG, resultB;

            Color pixel;

            for (x = 0; x < width; x++)

            {

                for (y = 0; y < height; y++)

                {

                    pixel = mybm.GetPixel(x, y);//获取当前坐标的像素值

                    resultR = 255 - pixel.R;//反红

                    resultG = 255 - pixel.G;//反绿

                    resultB = 255 - pixel.B;//反蓝

                    bm.SetPixel(x, y, Color.FromArgb(resultR, resultG, resultB));//绘图

                }

            }

            return bm;

        }

        #endregion

        #region 浮雕处理

        /// <summary>

        /// 浮雕处理

        /// </summary>

        /// <param name="oldBitmap">原始图片</param>

        /// <param name="Width">原始图片的长度</param>

        /// <param name="Height">原始图片的高度</param>

        public Bitmap FD(Bitmap oldBitmap, int Width, int Height)

        {

            Bitmap newBitmap = new Bitmap(Width, Height);

            Color color1, color2;

            for (int x = 0; x < Width - 1; x++)

            {

                for (int y = 0; y < Height - 1; y++)

                {

                    int r = 0, g = 0, b = 0;

                    color1 = oldBitmap.GetPixel(x, y);

                    color2 = oldBitmap.GetPixel(x + 1, y + 1);

                    r = Math.Abs(color1.R - color2.R + 128);

                    g = Math.Abs(color1.G - color2.G + 128);

                    b = Math.Abs(color1.B - color2.B + 128);

                    if (r > 255) r = 255;

                    if (r < 0) r = 0;

                    if (g > 255) g = 255;

                    if (g < 0) g = 0;

                    if (b > 255) b = 255;

                    if (b < 0) b = 0;

                    newBitmap.SetPixel(x, y, Color.FromArgb(r, g, b));

                }

            }

            return newBitmap;

        }

        #endregion

        #region 拉伸图片

        /// <summary>

        /// 拉伸图片

        /// </summary>

        /// <param name="bmp">原始图片</param>

        /// <param name="newW">新的宽度</param>

        /// <param name="newH">新的高度</param>

        public static Bitmap ResizeImage(Bitmap bmp, int newW, int newH)

        {

            try

            {

                Bitmap bap = new Bitmap(newW, newH);

                Graphics g = Graphics.FromImage(bap);

                g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;

                g.DrawImage(bap, new Rectangle(0, 0, newW, newH), new Rectangle(0, 0, bap.Width, bap.Height), GraphicsUnit.Pixel);

                g.Dispose();

                return bap;

            }

            catch

            {

                return null;

            }

        }

        #endregion

        #region 滤色处理

        /// <summary>

        /// 滤色处理

        /// </summary>

        /// <param name="mybm">原始图片</param>

        /// <param name="width">原始图片的长度</param>

        /// <param name="height">原始图片的高度</param>

        public Bitmap FilPic(Bitmap mybm, int width, int height)

        {

            Bitmap bm = new Bitmap(width, height);//初始化一个记录滤色效果的图片对象

            int x, y;

            Color pixel;

            for (x = 0; x < width; x++)

            {

                for (y = 0; y < height; y++)

                {

                    pixel = mybm.GetPixel(x, y);//获取当前坐标的像素值

                    bm.SetPixel(x, y, Color.FromArgb(0, pixel.G, pixel.B));//绘图

                }

            }

            return bm;

        }

        #endregion

        #region 左右翻转

        /// <summary>

        /// 左右翻转

        /// </summary>

        /// <param name="mybm">原始图片</param>

        /// <param name="width">原始图片的长度</param>

        /// <param name="height">原始图片的高度</param>

        public Bitmap RevPicLR(Bitmap mybm, int width, int height)

        {

            Bitmap bm = new Bitmap(width, height);

            int x, y, z; //x,y是循环次数,z是用来记录像素点的x坐标的变化的

            Color pixel;

            for (y = height - 1; y >= 0; y--)

            {

                for (x = width - 1, z = 0; x >= 0; x--)

                {

                    pixel = mybm.GetPixel(x, y);//获取当前像素的值

                    bm.SetPixel(z++, y, Color.FromArgb(pixel.R, pixel.G, pixel.B));//绘图

                }

            }

            return bm;

        }

        #endregion

        #region 上下翻转

        /// <summary>

        /// 上下翻转

        /// </summary>

        /// <param name="mybm">原始图片</param>

        /// <param name="width">原始图片的长度</param>

        /// <param name="height">原始图片的高度</param>

        public Bitmap RevPicUD(Bitmap mybm, int width, int height)

        {

            Bitmap bm = new Bitmap(width, height);

            int x, y, z;

            Color pixel;

            for (x = 0; x < width; x++)

            {

                for (y = height - 1, z = 0; y >= 0; y--)

                {

                    pixel = mybm.GetPixel(x, y);//获取当前像素的值

                    bm.SetPixel(x, z++, Color.FromArgb(pixel.R, pixel.G, pixel.B));//绘图

                }

            }

            return bm;

        }

        #endregion

        #region 压缩图片

        /// <summary>

        /// 压缩到指定尺寸

        /// </summary>

        /// <param name="oldfile">原文件</param>

        /// <param name="newfile">新文件</param>

        public bool Compress(string oldfile, string newfile)

        {

            try

            {

                System.Drawing.Image img = System.Drawing.Image.FromFile(oldfile);

                System.Drawing.Imaging.ImageFormat thisFormat = img.RawFormat;

                Size newSize = new Size(100, 125);

                Bitmap outBmp = new Bitmap(newSize.Width, newSize.Height);

                Graphics g = Graphics.FromImage(outBmp);

                g.CompositingQuality = CompositingQuality.HighQuality;

                g.SmoothingMode = SmoothingMode.HighQuality;

                g.InterpolationMode = InterpolationMode.HighQualityBicubic;

                g.DrawImage(img, new Rectangle(0, 0, newSize.Width, newSize.Height), 0, 0, img.Width, img.Height, GraphicsUnit.Pixel);

                g.Dispose();

                EncoderParameters encoderParams = new EncoderParameters();

                long[] quality = new long[1];

                quality[0] = 100;

                EncoderParameter encoderParam = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, quality);

                encoderParams.Param[0] = encoderParam;

                ImageCodecInfo[] arrayICI = ImageCodecInfo.GetImageEncoders();

                ImageCodecInfo jpegICI = null;

                for (int x = 0; x < arrayICI.Length; x++)

                    if (arrayICI[x].FormatDescription.Equals("JPEG"))

                    {

                        jpegICI = arrayICI[x]; //设置JPEG编码

                        break;

                    }

                img.Dispose();

                if (jpegICI != null) outBmp.Save(newfile, System.Drawing.Imaging.ImageFormat.Jpeg);

                outBmp.Dispose();

                return true;

            }

            catch

            {

                return false;

            }

        }

        #endregion

        #region 图片灰度化

        public Color Gray(Color c)

        {

            int rgb = Convert.ToInt32((double)(((0.3 * c.R) + (0.59 * c.G)) + (0.11 * c.B)));

            return Color.FromArgb(rgb, rgb, rgb);

        }

        #endregion

        #region 转换为黑白图片

        /// <summary>

        /// 转换为黑白图片

        /// </summary>

        /// <param name="mybt">要进行处理的图片</param>

        /// <param name="width">图片的长度</param>

        /// <param name="height">图片的高度</param>

        public Bitmap BWPic(Bitmap mybm, int width, int height)

        {

            Bitmap bm = new Bitmap(width, height);

            int x, y, result; //x,y是循环次数，result是记录处理后的像素值

            Color pixel;

            for (x = 0; x < width; x++)

            {

                for (y = 0; y < height; y++)

                {

                    pixel = mybm.GetPixel(x, y);//获取当前坐标的像素值

                    result = (pixel.R + pixel.G + pixel.B) / 3;//取红绿蓝三色的平均值

                    bm.SetPixel(x, y, Color.FromArgb(result, result, result));

                }

            }

            return bm;

        }

        #endregion

        #region 获取图片中的各帧

        /// <summary>

        /// 获取图片中的各帧

        /// </summary>

        /// <param name="pPath">图片路径</param>

        /// <param name="pSavePath">保存路径</param>

        public void GetFrames(string pPath, string pSavedPath)

        {

            Image gif = Image.FromFile(pPath);

            FrameDimension fd = new FrameDimension(gif.FrameDimensionsList[0]);

            int count = gif.GetFrameCount(fd); //获取帧数(gif图片可能包含多帧，其它格式图片一般仅一帧)

            for (int i = 0; i < count; i++)    //以Jpeg格式保存各帧

            {

                gif.SelectActiveFrame(fd, i);

                gif.Save(pSavedPath + "\\frame_" + i + ".jpg", ImageFormat.Jpeg);

            }

        }

        #endregion

    }

}