/// <summary>生成验证码图片</summary>
/// <returns>验证码和图片元组对象</returns>
public static VerifyImage Draw(int w = 80, int h = 40)
{
var fontStencil = FontHelper.GetFont(App.Utils.Properties.Resources.Stencil_ICG, 36, FontStyle.Bold);
//var fontPledg = FontHelper.GetFont(App.Properties.Resources.PLEDG_KI, 36, FontStyle.Italic); // 注意样式要匹配，否则会报异常
//var fontAgent = FontHelper.GetFont(App.Properties.Resources.Agent_Red, 26, FontStyle.Regular);
// 颜色、字体、字符（去掉了一些容易混淆的字符)
Color[] colors = { Color.Green };
char[] chars = { '2', '3', '4', '5', '6', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'J', 'K', 'M', 'N', 'P', 'R', 'S', 'T', 'W', 'X', 'Y' };
var cfgs = new List <VerifyCodeConfig>()
{
//new VerifyCodeConfig(fontAgent, 18, -2, 0), // 空心字体
//new VerifyCodeConfig(new Font("Disko", 24), 17, -2, 2), // 空心字体
//new VerifyCodeConfig(new Font("Times New Roman", 36), 18, -8, 2),
new VerifyCodeConfig(fontStencil, 22, -5, 0),
//new VerifyCodeConfig(fontPledg, 20, -2, 0),
//new VerifyCodeFont(new Font("Gungsuh", 18), 18, 2, 2),
};
// 生成验证码字符串
Random rnd = new Random();
string code = string.Empty;
for (int i = 0; i < 4; i++)
{
code += chars[rnd.Next(chars.Length)];
}
// 创建画布
var bmp = new Bitmap(w, h);
var g = Graphics.FromImage(bmp);
g.Clear(Color.White);
// 画噪点
for (int i = 0; i < 40; i++)
{
int x = rnd.Next(w);
int y = rnd.Next(h);
int width = rnd.Next(5);
int height = width;
bmp.SetPixel(x, y, Color.Gray);
}
// 画噪线
/*
* for (int i = 0; i < 5; i++)
* {
* int x1 = rnd.Next(w);
* int y1 = rnd.Next(h);
* int x2 = rnd.Next(w);
* int y2 = rnd.Next(h);
* Color clr = colors[rnd.Next(colors.Length)];
* g.DrawLine(new Pen(clr), x1, y1, x2, y2);
* }
*/
// 画验证码字符串
//Font font = new Font("Arial", 36);
//Color color = Color.Blue;
//DrawChar(g, 'B', 0, 0, font, color);
var cfg = cfgs[rnd.Next(cfgs.Count)];
for (int i = 0; i < code.Length; i++)
{
var c = code[i];
var x = i * cfg.Width + cfg.HMargin;
var y = cfg.VMargin;
var angle = new Random().Next(-30, 30);
var font = cfg.Font;
var color = colors[rnd.Next(colors.Length)];
if (angle == 0)
{
angle = 15;
}
DrawChar(g, c, x, y, font, color, angle);
System.Threading.Thread.Sleep(1);
}
// 扭曲
bmp = Painter.Twist(bmp);
// 反相部分区域（未完成）
/*
* var bmp2 = new Bitmap(w, h);
* var g2 = Graphics.FromImage(bmp2);
* //g2.FillRectangle(new SolidBrush(Color.Black), 0, 0, w, h);
* var polygon1 = new PointF[] {
* new PointF(0, 0),
* new PointF((float)(w*2/3.0), 0),
* new PointF(0, (float)(h*2/3.0))
* };
* g2.FillPolygon(new SolidBrush(Color.White), polygon1);
* var polygon2 = new PointF[] {
* new PointF((float)(w/3.0), h),
* new PointF(w, h),
* new PointF(w, (float)(h/3.0))
* };
* g2.FillPolygon(new SolidBrush(Color.White), polygon2);
* //bmp = DrawHelper.ReverseImage(bmp, bmp2, new Point(0, 0));
*/
//
return(new VerifyImage(code, bmp));
}