我要评论 1 using system;
2 using system.collections.generic;
3 using system.linq;
4 using system.web;
5 using thoughtworks.qrcode.codec;
6 using system.drawing;
7 using system.drawing.imaging;
8 using game.utils;
9 using system.drawing.drawing2d;
10 using game.facade;
11 using system.net;
12 using system.io;
13
14 namespace game.web.ws
15 {
16 /// <summary>
17 /// qrcode 的摘要说明
18 /// </summary>
19 public class qrcode : ihttphandler
20 {
21
22 public void processrequest(httpcontext context)
23 {
24 getqrcode(context);
25 }
26
27 /// <summary>
28 /// 绘制二维码
29 /// </summary>
30 /// <param name="context"></param>
31 private void getqrcode(httpcontext context)
32 {
33 string encodedata = gamerequest.getquerystring("qt");
34 string icourl = gamerequest.getquerystring("qm");
35 int width = gamerequest.getqueryint("qs", 0);
36 if (encodedata != string.empty)
37 {
38 calqrcode(encodedata, icourl, width, context);
39 }
40 }
41
42 /// <summary>
43 /// 按照指定的大小绘制二维码
44 /// </summary>
45 /// <param name="sdata"></param>
46 /// <param name="width"></param>
47 /// <returns></returns>
48 private void calqrcode(string sdata, string icourl, int size, httpcontext context)
49 {
50 //二维码版本,大小获取
51 color qrcodebackgroundcolor = color.white;
52 color qrcodeforegroundcolor = color.black;
53 int length = system.text.encoding.utf8.getbytes(sdata).length;
54
55 //生成二维码数据
56 qrcodeencoder qrcodeencoder = new qrcodeencoder();
57 qrcodeencoder.qrcodeencodemode = qrcodeencoder.encode_mode.byte;
58 qrcodeencoder.qrcodeerrorcorrect = qrcodeencoder.error_correction.m;//使用m纠错级别
59 qrcodeencoder.qrcodeversion = 0;
60 var encodeddata = qrcodeencoder.encode(sdata, system.text.encoding.utf8);
61
62 //绘制图片
63 int x = 0, y = 0;
64 int w = 0, h = 0;
65 // 二维码矩阵单边数据点数目
66 int count = encodeddata.length;
67 // 获取单个数据点边长
68 double sidelength = convert.todouble(size) / count;
69 // 初始化背景色画笔
70 solidbrush backcolor = new solidbrush(qrcodebackgroundcolor);
71 // 初始化前景色画笔
72 solidbrush forecolor = new solidbrush(qrcodeforegroundcolor);
73 // 定义画布
74 bitmap image = new bitmap(size, size);
75 // 获取gdi+绘图图画
76 graphics graph = graphics.fromimage(image);
77 // 先填充背景色
78 graph.fillrectangle(backcolor, 0, 0, size, size);
79
80 // 变量数据矩阵生成二维码
81 for (int row = 0; row < count; row++)
82 {
83 for (int col = 0; col < count; col++)
84 {
85 // 计算数据点矩阵起始坐标和宽高
86 x = convert.toint32(math.round(col * sidelength));
87 y = convert.toint32(math.round(row * sidelength));
88 w = convert.toint32(math.ceiling((col + 1) * sidelength) - math.floor(col * sidelength));
89 h = convert.toint32(math.ceiling((row + 1) * sidelength) - math.floor(row * sidelength));
90
91 // 绘制数据矩阵
92 graph.fillrectangle(encodeddata[col][row] ? forecolor : backcolor, x, y, w, h);
93 }
94 }
95
96 //添加logo
97 string path = context.server.mappath("/favicon.ico");
98 bitmap logoimage = null;
99 fileinfo fileinfo = new fileinfo(path);
100 if (fileinfo.exists)
101 {
102 logoimage = new bitmap(path);
103 }
104 if (icourl != "")
105 {
106 httpwebrequest webrequest = (httpwebrequest)httpwebrequest.create(icourl);
107 try
108 {
109 httpwebresponse webreponse = (httpwebresponse)webrequest.getresponse();
110 if (webreponse.statuscode == httpstatuscode.ok)
111 {
112 using (stream stream = webreponse.getresponsestream())
113 {
114 image img = image.fromstream(stream);
115 logoimage = new bitmap(img);
116 img.dispose();
117 }
118 }
119 }
120 catch { }
121 }
122 if (logoimage != null)
123 {
124 image = coverimage(image, logoimage, graph);
125 logoimage.dispose();
126 }
127 //输出
128 system.io.memorystream ms = new system.io.memorystream();
129 image.save(ms, system.drawing.imaging.imageformat.png);
130 context.response.clearcontent();
131 context.response.contenttype = "image/png";
132 context.response.addheader("content-disposition", "attachment; filename=" + httputility.urlencode("qrcodeimg.png", system.text.encoding.utf8));
133 context.response.binarywrite(ms.toarray());
134 context.response.flush();
135 context.response.end();
136 image.dispose();
137 }
138
139 /// <summary>
140 /// 层叠图片
141 /// </summary>
142 /// <param name="original">原始图片(目前只支持正方形)</param>
143 /// <param name="image">层叠图片(目前只支持正方形)</param>
144 /// <returns>处理以后的图片</returns>
145 private bitmap coverimage(bitmap original, bitmap image, graphics graph = null)
146 {
147 //缩放附加图片
148 int sideslen = original.width;
149 int sidetlen = sideslen / 4;
150 image = resizeimage(image, sidetlen, sidetlen);
151
152 // 获取gdi+绘图图画
153 graph = graph == null ? graphics.fromimage(original) : graph;
154
155 // 将附加图片绘制到原始图中央
156 graph.drawimage(image, (original.width - sidetlen) / 2, (original.height - sidetlen) / 2, sidetlen, sidetlen);
157
158 // 释放gdi+绘图图画内存
159 graph.dispose();
160
161 // 返回处理结果
162 return original;
163 }
164
165 /// <summary>
166 /// 图片缩放
167 /// </summary>
168 /// <param name="bmp">原始bitmap</param>
169 /// <param name="neww">新的宽度</param>
170 /// <param name="newh">新的高度</param>
171 /// <returns>处理以后的图片</returns>
172 private bitmap resizeimage(bitmap original, int width, int height)
173 {
174 try
175 {
176 bitmap image = new bitmap(width, height);
177 graphics graph = graphics.fromimage(image);
178 // 插值算法的质量
179 graph.compositingquality = compositingquality.highquality;
180 graph.smoothingmode = smoothingmode.highquality;
181 graph.interpolationmode = interpolationmode.highqualitybicubic;
182 graph.drawimage(original, new rectangle(0, 0, width, height),
183 new rectangle(0, 0, original.width, original.height), graphicsunit.pixel);
184 graph.dispose();
185 return image;
186 }
187 catch
188 {
189 return null;
190 }
191 }
192
193 public bool isreusable
194 {
195 get
196 {
197 return false;
198 }
199 }
200 }
201 }
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