Initial commit

EZCaptcha.cs

@@ -0,0 +1,165 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Drawing;
+using System.Drawing.Drawing2D;
+using System.Drawing.Imaging;
+using System.Drawing.Text;
+
+//-----------------------------------
+// Developer : Arash Azizi
+// Telegram : t.me/ArashAz_pv
+// Email : [email protected]
+// Github : github.com/MrArashAzizi
+// Gitlab : gitlab.com/SirArash
+//-----------------------------------
+
+namespace Captcha
+{
+    class EZCaptcha
+    {
+        public string Text
+        {
+            get { return this.text; }
+        }
+        public Bitmap Image
+        {
+            get { return this.image; }
+        }
+        public int Width
+        {
+            get { return this.width; }
+        }
+        public int Height
+        {
+            get { return this.height; }
+        }
+
+        private string text;
+        private int width;
+        private int height;
+        private string familyName;
+        private Bitmap image;
+
+        private Random random = new Random();
+
+        public EZCaptcha(string InputText, int width, int height)
+        {
+            this.text = InputText;
+            this.SetDimensions(width, height);
+            this.GenerateImage();
+        }
+
+        public EZCaptcha(string InputText, int width, int height, string FontFamilyName)
+        {
+            this.text = InputText;
+            this.SetDimensions(width, height);
+            this.SetFamilyName(FontFamilyName);
+            this.GenerateImage();
+        }
+
+        ~EZCaptcha()
+        {
+            Dispose(false);
+        }
+
+
+        public void Dispose()
+        {
+            GC.SuppressFinalize(this);
+            this.Dispose(true);
+        }
+
+        protected virtual void Dispose(bool disposing)
+        {
+            if (disposing)
+                this.image.Dispose();
+        }
+
+        private void SetDimensions(int width, int height)
+        {
+            if (width <= 0)
+                throw new ArgumentOutOfRangeException("width", width, "Argument out of range, must be greater than zero.");
+            if (height <= 0)
+                throw new ArgumentOutOfRangeException("height", height, "Argument out of range, must be greater than zero.");
+            this.width = width;
+            this.height = height;
+        }
+
+        private void SetFamilyName(string FontFamilyName)
+        {
+            try
+            {
+                Font font = new Font(this.familyName, 12F);
+                this.familyName = FontFamilyName;
+                font.Dispose();
+            }
+            catch
+            {
+                this.familyName = System.Drawing.FontFamily.GenericSerif.Name;
+            }
+        }
+
+        private void GenerateImage()
+        {
+            Bitmap bitmap = new Bitmap(this.width, this.height, PixelFormat.Format32bppArgb);
+
+            Graphics g = Graphics.FromImage(bitmap);
+            g.SmoothingMode = SmoothingMode.AntiAlias;
+            Rectangle rect = new Rectangle(0, 0, this.width, this.height);
+
+            HatchBrush hatchBrush = new HatchBrush(HatchStyle.SmallConfetti, Color.LightGray, Color.White);
+            g.FillRectangle(hatchBrush, rect);
+
+            SizeF size;
+            float fontSize = rect.Height + 1;
+            Font font;
+
+            do
+            {
+                fontSize--;
+                font = new Font(this.familyName, fontSize, FontStyle.Bold);
+                size = g.MeasureString(this.text, font);
+            } while (size.Width > rect.Width);
+
+            StringFormat format = new StringFormat();
+            format.Alignment = StringAlignment.Center;
+            format.LineAlignment = StringAlignment.Center;
+
+            GraphicsPath path = new GraphicsPath();
+            path.AddString(this.text, font.FontFamily, (int)font.Style, font.Size, rect, format);
+            float v = 4F;
+            PointF[] points =
+            {
+                new PointF(this.random.Next(rect.Width) / v, this.random.Next(rect.Height) / v),
+                new PointF(rect.Width - this.random.Next(rect.Width) / v, this.random.Next(rect.Height) / v),
+                new PointF(this.random.Next(rect.Width) / v, rect.Height - this.random.Next(rect.Height) / v),
+                new PointF(rect.Width - this.random.Next(rect.Width) / v, rect.Height - this.random.Next(rect.Height) / v)
+            };
+            Matrix matrix = new Matrix();
+            matrix.Translate(0F, 0F);
+
+            path.Warp(points, rect, matrix, WarpMode.Perspective, 0F);
+
+            hatchBrush = new HatchBrush(HatchStyle.LargeConfetti, Color.Gray, Color.DarkGray);
+            g.FillPath(hatchBrush, path);
+
+            int m = Math.Max(rect.Width, rect.Height);
+            for (int i = 0; i < (int)(rect.Width * rect.Height / 30F); i++)
+            {
+                int x = this.random.Next(rect.Width);
+                int y = this.random.Next(rect.Height);
+                int w = this.random.Next(m / 50);
+                int h = this.random.Next(m / 50);
+                g.FillEllipse(hatchBrush, x, y, w, h);
+            }
+
+            font.Dispose();
+            hatchBrush.Dispose();
+            g.Dispose();
+
+            this.image = bitmap;
+        }
+    }
+}