285 lines
10 KiB
C#
285 lines
10 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.Drawing;
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using System.Drawing.Drawing2D;
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using System.Drawing.Imaging;
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using System.Linq;
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using System.Net;
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using System.Text;
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using System.Threading;
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using System.Threading.Tasks;
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using ThoughtWorks.QRCode.Codec;
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using ZXing;
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using ZXing.QrCode;
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namespace MyCode.Project.Infrastructure.Common
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{
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/// <summary>
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/// 图片帮助类
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/// </summary>
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public class ImageUtils
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{
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private static int num = 0;
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private static int num2 = 0;
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private static int successunm = 0;
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/// <summary>
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/// 生成二维码图片
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/// </summary>
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/// <param name="codeNumber">要生成二维码的字符串</param>
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/// <param name="size">大小尺寸</param>
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/// <returns>二维码图片</returns>
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public static Bitmap Create_ImgCode(string codeNumber, int size)
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{
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//创建二维码生成类
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QRCodeEncoder qrCodeEncoder = new QRCodeEncoder();
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//设置编码模式
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qrCodeEncoder.QRCodeEncodeMode = QRCodeEncoder.ENCODE_MODE.BYTE;
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//设置编码测量度
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qrCodeEncoder.QRCodeScale = size;
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//设置编码版本
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qrCodeEncoder.QRCodeVersion = 0;
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//设置编码错误纠正
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qrCodeEncoder.QRCodeErrorCorrect = QRCodeEncoder.ERROR_CORRECTION.M;
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//int i = 0;
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//while (num > 0 && i < 10)
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//{
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// i++;
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// Thread.Sleep(2000);
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//}
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//num++;
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//生成二维码图片
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System.Drawing.Bitmap image = qrCodeEncoder.Encode(codeNumber);
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num--;
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return image;
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}
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/// <summary>
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/// 生成二维码图片
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/// </summary>
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/// <param name="content">生成内容</param>
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/// <returns></returns>
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public static Bitmap CreateImgCode(string content)
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{
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BarcodeWriter writer=new BarcodeWriter();
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writer.Format=BarcodeFormat.QR_CODE;
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QrCodeEncodingOptions options=new QrCodeEncodingOptions();
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options.DisableECI = true;
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//设置内容编码
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options.CharacterSet = "UTF-8";
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//设置二维码的宽度和高度
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options.Width = 255;
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options.Height = 255;
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//设置二维码的边距，单位不是固定像素
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options.Margin = 1;
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writer.Options = options;
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Bitmap image = writer.Write(content);
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return image;
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}
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/// <summary>
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/// 合并图片
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/// </summary>
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/// <param name="bitMapDic"></param>
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/// <returns></returns>
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public static Bitmap MergerImg(Dictionary<string, Bitmap> bitMapDic)
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{
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if (bitMapDic == null || bitMapDic.Count == 0)
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throw new Exception("图片数不能够为0");
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//创建要显示的图片对象,根据参数的个数设置宽度
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Bitmap backgroudImg = new Bitmap(bitMapDic.Count * 12, 16);
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Graphics g = Graphics.FromImage(backgroudImg);
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//清除画布,背景设置为白色
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g.Clear(System.Drawing.Color.White);
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int j = 0;
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foreach (KeyValuePair<string, Bitmap> entry in bitMapDic)
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{
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Bitmap map = entry.Value;
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g.DrawImage(map, j * 11, 0, map.Width, map.Height);
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j++;
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}
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g.Dispose();
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return backgroudImg;
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}
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/// <summary>
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/// 调用此函数后使此两种图片合并
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/// </summary>
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/// <param name="imgBack">粘贴的源图片</param>
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/// <param name="img">粘贴的目标图片</param>
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/// <param name="x">左边距</param>
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/// <param name="y">上边距</param>
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/// <param name="width">宽度</param>
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/// <param name="height">高度</param>
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public static Image CombinImage(Image imgBack, Image img, float x,float y,float width,float height)
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{
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//从指定的System.Drawing.Image创建新的System.Drawing.Graphics
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Graphics g = Graphics.FromImage(imgBack);
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//加框
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g.FillRectangle(System.Drawing.Brushes.Transparent, x - 1, y - 1, width + 2, height + 2);
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//g.DrawImage(img, 照片与相框的左边距, 照片与相框的上边距, 照片宽, 照片高);单位：像素
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g.DrawImage(img, x, y, width, height);
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g.Dispose();
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//GC.Collect();
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return imgBack;
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}
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/// <summary>
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/// 从网络下载图片
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/// </summary>
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/// <param name="url"></param>
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/// <returns></returns>
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public static Image DownLoadNetImage(string url)
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{
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HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
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req.ServicePoint.Expect100Continue = false;
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req.Method = "GET";
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req.KeepAlive = true;
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req.ContentType = "image/jpg";
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HttpWebResponse rsp = (HttpWebResponse)req.GetResponse();
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System.IO.Stream stream = null;
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try
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{
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// 以字符流的方式读取HTTP响应
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stream = rsp.GetResponseStream();
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var image = System.Drawing.Image.FromStream(stream);
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return image;
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}
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finally
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{
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// 释放资源
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if (stream != null) stream.Close();
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if (rsp != null) rsp.Close();
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}
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}
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/// <summary>
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/// 裁剪图片
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/// </summary>
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/// <param name="img"></param>
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/// <returns></returns>
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public static Image CutEllipse(Image img, int x, int y, int width, int height)
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{
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//截图画板
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Bitmap bm = new Bitmap(width, height);
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Graphics g = Graphics.FromImage(bm);
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//创建截图路径（类似Ps里的路径）
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GraphicsPath gpath = new GraphicsPath();
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gpath.AddEllipse(x, y, width, height);//圆形
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//设置画板的截图路径
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g.SetClip(gpath);
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//对图片进行截图
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g.DrawImage(img, x, y);
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g.Dispose();
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return bm;
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}
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/// <summary>
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/// 为图片生成缩略图 by 何问起
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/// </summary>
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/// <param name="image">图片</param>
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/// <param name="width">缩略图宽</param>
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/// <param name="height">缩略图高</param>
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/// <returns></returns>
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public static System.Drawing.Image GetHvtThumbnail(Image image, int width, int height)
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{
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//代码是从开源项目HoverTreeCMS中获取的
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//更多信息请参考：http://hovertree.com/menu/hovertreecms/
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Bitmap m_hovertreeBmp = new Bitmap(width, height);
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//从Bitmap创建一个System.Drawing.Graphics
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Graphics m_HvtGr = Graphics.FromImage(m_hovertreeBmp);
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try
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{
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//设置
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m_HvtGr.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
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//下面这个也设成高质量
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m_HvtGr.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
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//下面这个设成High
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m_HvtGr.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
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//把原始图像绘制成上面所设置宽高的缩小图
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Rectangle rectDestination = new Rectangle(0, 0, width, height);
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int m_width, m_height;
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if (image.Width * height > image.Height * width)
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{
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m_height = image.Height;
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m_width = (image.Height * width) / height;
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}
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else
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{
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m_width = image.Width;
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m_height = (image.Width * height) / width;
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}
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m_HvtGr.DrawImage(image, rectDestination, 0, 0, m_width, m_height, GraphicsUnit.Pixel);
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}
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finally
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{
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//关闭资源
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m_HvtGr.Dispose();
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}
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//GC.Collect();
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return m_hovertreeBmp;
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}
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/// <summary>
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/// 根据指定宽度、高度缩放图片
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/// </summary>
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/// <param name="image"></param>
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/// <param name="width"></param>
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/// <param name="height"></param>
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/// <returns></returns>
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public static Bitmap ResizeImage(Image image, int width, int height)
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{
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var destRect = new Rectangle(0, 0, width, height);
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var destImage = new Bitmap(width, height);
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destImage.SetResolution(image.HorizontalResolution, image.VerticalResolution);
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using (var graphics = Graphics.FromImage(destImage))
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{
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graphics.CompositingMode = CompositingMode.SourceCopy;
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graphics.CompositingQuality = CompositingQuality.HighQuality;
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graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
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graphics.SmoothingMode = SmoothingMode.HighQuality;
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graphics.PixelOffsetMode = PixelOffsetMode.HighQuality;
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using (var wrapMode = new ImageAttributes())
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{
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wrapMode.SetWrapMode(WrapMode.TileFlipXY);
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//int i = 0;
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//while (num2 > 0 && i < 10)
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//{
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// i++;
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// //Thread.Sleep(2000);
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//}
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//num2++;
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graphics.DrawImage(image, destRect, 0, 0, image.Width, image.Height, GraphicsUnit.Pixel, wrapMode);
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num2--;
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successunm++;
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LogHelper.Info("成功"+ successunm.ToString());
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}
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}
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return destImage;
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}
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}
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}
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