private void ImageYarat()
{
this.familyName = System.Drawing.FontFamily.GenericSerif.Name;
// 32bit bmp yaratalim
System.Drawing.Bitmap bitmap = new System.Drawing.Bitmap(this.m_width, this.m_height, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
// cizim icin bir graphics nesnesi yaratalim.
System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bitmap);
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
System.Drawing.Rectangle rec = new System.Drawing.Rectangle(0, 0, this.m_width, this.m_height);
// Resimde arka alani dolduralim
System.Drawing.Drawing2D.HatchBrush hb = new System.Drawing.Drawing2D.HatchBrush(System.Drawing.Drawing2D.HatchStyle.SmallConfetti, System.Drawing.Color.LightGray, System.Drawing.Color.White);
g.FillRectangle(hb, rec);
System.Drawing.Font font = new System.Drawing.Font(this.familyName, this.FontSize, System.Drawing.FontStyle.Bold);
// textin formatini belirleyelim
System.Drawing.StringFormat format = new System.Drawing.StringFormat();
format.Alignment = System.Drawing.StringAlignment.Center;
format.LineAlignment = System.Drawing.StringAlignment.Center;
// bir path belirleyip, texte random olarak aci verelim
System.Drawing.Drawing2D.GraphicsPath path = new System.Drawing.Drawing2D.GraphicsPath();
path.AddString(this.m_text, font.FontFamily, (int)font.Style, font.Size, rec, format);
float v = 4;
System.Drawing.PointF[] p = { new System.Drawing.PointF(this.random.Next(rec.Width) / v, this.random.Next(rec.Height) / v), new System.Drawing.PointF(rec.Width - this.random.Next(rec.Width) / v, this.random.Next(rec.Height) / v), new System.Drawing.PointF(this.random.Next(rec.Width) / v, rec.Height - this.random.Next(rec.Height) / v), new System.Drawing.PointF(rec.Width - this.random.Next(rec.Width) / v, rec.Height - this.random.Next(rec.Height) / v) };
System.Drawing.Drawing2D.Matrix matrix = new System.Drawing.Drawing2D.Matrix();
matrix.Translate(0f, 0f);
path.Warp(p, rec, matrix, System.Drawing.Drawing2D.WarpMode.Perspective, 0);
hb = new System.Drawing.Drawing2D.HatchBrush(System.Drawing.Drawing2D.HatchStyle.LargeConfetti, System.Drawing.Color.LightGray, System.Drawing.Color.Blue);
g.FillPath(hb, path);
for (int i = 0; i <= (int)(rec.Width * rec.Height / 30) - 1; i++)
{
int x = this.random.Next(rec.Width);
int y = this.random.Next(rec.Height);
int w = this.random.Next(rec.Width / 50);
int h = this.random.Next(rec.Width / 40);
g.FillEllipse(hb, x, y, w, h);
}
this.m_image = bitmap;
}
private void GenerateImage()
{
System.Drawing.Bitmap bitmap = new System.Drawing.Bitmap
(this.width, this.height, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bitmap);
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
System.Drawing.Rectangle rect = new System.Drawing.Rectangle(0, 0, this.width, this.height);
System.Drawing.Drawing2D.HatchBrush hatchBrush =
new System.Drawing.Drawing2D.HatchBrush(
System.Drawing.Drawing2D.HatchStyle.SmallConfetti,
System.Drawing.Color.LightGray, System.Drawing.Color.White);
g.FillRectangle(hatchBrush, rect);
System.Drawing.SizeF size;
float fontSize = rect.Height + 1;
System.Drawing.Font font;
do
{
fontSize--;
font = new System.Drawing.Font(System.Drawing.FontFamily.GenericSansSerif, fontSize, System.Drawing.FontStyle.Bold);
size = g.MeasureString(this.text, font);
} while (size.Width > rect.Width);
System.Drawing.StringFormat format = new System.Drawing.StringFormat();
format.Alignment = System.Drawing.StringAlignment.Center;
format.LineAlignment = System.Drawing.StringAlignment.Center;
System.Drawing.Drawing2D.GraphicsPath path = new System.Drawing.Drawing2D.GraphicsPath();
//path.AddString(this.text, font.FontFamily, (int) font.Style,
// font.Size, rect, format);
path.AddString(this.text, font.FontFamily, (int)font.Style, 75, rect, format);
float v = 4F;
System.Drawing.PointF[] points =
{
new System.Drawing.PointF(this.random.Next(rect.Width) / v, this.random.Next(
rect.Height) / v),
new System.Drawing.PointF(rect.Width - this.random.Next(rect.Width) / v,
this.random.Next(rect.Height) / v),
new System.Drawing.PointF(this.random.Next(rect.Width) / v,
rect.Height - this.random.Next(rect.Height) / v),
new System.Drawing.PointF(rect.Width - this.random.Next(rect.Width) / v,
rect.Height - this.random.Next(rect.Height) / v)
};
System.Drawing.Drawing2D.Matrix matrix = new System.Drawing.Drawing2D.Matrix();
matrix.Translate(0F, 0F);
path.Warp(points, rect, matrix, System.Drawing.Drawing2D.WarpMode.Perspective, 0F);
hatchBrush = new System.Drawing.Drawing2D.HatchBrush(
System.Drawing.Drawing2D.HatchStyle.Percent10
, System.Drawing.Color.Black, System.Drawing.Color.SkyBlue);
g.FillPath(hatchBrush, path);
int m = System.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;
}
public Stream GetLetter(LetterOptions options)
{
_stream = new MemoryStream();
using (var renderer = _renderer)
{
var result = renderer.Configure(o =>
{
o.Width = options.Width;
o.Height = options.Height;
})
.Render(bitmap =>
{
// Create a graphics object for drawing.
var g = Graphics.FromImage(bitmap);
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
var rect = new RectangleF(0, 0, options.Width, options.Height);
// Fill in the background.
var backBrush = new System.Drawing.Drawing2D.LinearGradientBrush(
rect,
options.BackColor.ToColor(Color.CornflowerBlue),
options.BackColor.ToColor(Color.CornflowerBlue),
System.Drawing.Drawing2D.LinearGradientMode.Horizontal);
g.FillRectangle(backBrush, rect);
// create solid dark brush
var gradBrushDark = new System.Drawing.Drawing2D.LinearGradientBrush(rect, Color.Black,
Color.Gray,
System.Drawing.Drawing2D.LinearGradientMode.Horizontal);
// Set up the text font.
SizeF size;
float fontSize = 200;
Font font = null;
// Adjust the font size until the text fits within the image.
do
{
fontSize -= 1;
font = new Font(options.FontFamily, fontSize, FontStyle.Bold);
size = g.MeasureString(options.Letter.ToString(), font);
} while (size.Width > rect.Width);
// Set up the text format.
var format = new StringFormat();
format.Alignment = StringAlignment.Center;
format.LineAlignment = StringAlignment.Center;
// Create a path using the text and warp it randomly - nice :)
var path = new System.Drawing.Drawing2D.GraphicsPath();
path.AddString(options.Letter.ToString(),
font.FontFamily,
System.Convert.ToInt32(font.Style),
font.Size,
rect,
format);
float v = 8f;
PointF[] points =
{
new PointF((Int32)rect.Width / v, (Int32)rect.Height / v),
new PointF(rect.Width - (Int32)rect.Width / v, (Int32)rect.Height / v),
new PointF((Int32)rect.Width / v, rect.Height - (Int32)rect.Height / v),
new PointF(rect.Width - (Int32)rect.Width / v, rect.Height - (Int32)rect.Height / v)
};
var matrix = new System.Drawing.Drawing2D.Matrix();
matrix.Translate(0f, 0f);
path.Warp(points, rect, matrix, System.Drawing.Drawing2D.WarpMode.Perspective, 0f);
// Draw the letter
var foreBrush = new System.Drawing.Drawing2D.LinearGradientBrush(
rect,
Color.White,
Color.White,
System.Drawing.Drawing2D.LinearGradientMode.Horizontal);
g.FillPath(foreBrush, path);
});
result.Save(_stream, ImageFormat.Png);
}
return(_stream);
}
public static byte[] VisualCaptcha(string source)
{
try
{
System.Random r = new System.Random();
int w = 350, h = 75;
string family = "Arial Rounded MT Bold";
using (var bmp = new System.Drawing.Bitmap(w, h
, System.Drawing.Imaging.PixelFormat.Format32bppArgb))
{
int m = 0, nm = 0;
System.Drawing.Color tc;
using (var g = System.Drawing.Graphics.FromImage(bmp))
{
g.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAlias;
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
g.Clear(System.Drawing.Color.White);
System.Drawing.SizeF size;
m = r.Next() % 9 + 1;
nm = r.Next() % 3;
tc = System.Drawing.Color.FromArgb(255, 255, 255);
size = g.MeasureString(source
, new System.Drawing.Font(family, h * 1.2f, System.Drawing.FontStyle.Bold)
, new System.Drawing.SizeF(w * 1F, h * 1F));
using (var brush = new System.Drawing.Drawing2D.LinearGradientBrush(
new System.Drawing.Rectangle(0, 0, w, h)
, System.Drawing.Color.Black
, System.Drawing.Color.Black, 45, false))
{
System.Drawing.Drawing2D.ColorBlend blend =
new System.Drawing.Drawing2D.ColorBlend(6);
for (var i = 0; i < 6; i++)
{
blend.Positions[i] = i * (1 / 5F); blend.Colors[i] = r.RandomColor(255, 64, 128);
}
brush.InterpolationColors = blend;
for (int wave = 0; wave < 2; wave++)
{
int min = (15 + wave * 20);
System.Drawing.PointF[] pt = new System.Drawing.PointF[] {
new System.Drawing.PointF(16f, (float)r.Next(min, min + 10))
, new System.Drawing.PointF(240f, (float)r.Next(min + 10, min + 20))
};
System.Collections.Generic.List <System.Drawing.PointF> PointList =
new System.Collections.Generic.List <System.Drawing.PointF>();
float curDist = 0, distance = 0;
for (int i = 0; i < pt.Length - 1; i++)
{
System.Drawing.PointF ptA = pt[i], ptB = pt[i + 1];
float deltaX = ptB.X - ptA.X, deltaY = ptB.Y - ptA.Y;
curDist = 0;
distance = (float)System.Math.Sqrt(System.Math.Pow(deltaX, 2) + System.Math.Pow(deltaY, 2));
while (curDist < distance)
{
curDist++;
float offsetX = (float)((double)curDist / (double)distance * (double)deltaX);
float offsetY = (float)((double)curDist / (double)distance * (double)deltaY);
PointList.Add(new System.Drawing.PointF(ptA.X + offsetX, ptA.Y + offsetY));
}
}
for (int i = 0; i < PointList.Count - 24; i = i + 24)
{
float x1 = PointList[i].X, y1 = PointList[i].Y, x2 = PointList[i + 24].X, y2 = PointList[i + 24].Y;
float angle = (float)((System.Math.Atan2(y2 - y1, x2 - x1) * 180 / 3.14159265));
g.TranslateTransform(x1, y1);
g.RotateTransform(angle);
int pm = r.Next() % 2 + 1;
System.Drawing.Point[] p1 = new System.Drawing.Point[] {
new System.Drawing.Point(0, 0)
, new System.Drawing.Point(3, -3 * pm)
, new System.Drawing.Point(6, -4 * pm)
, new System.Drawing.Point(9, -3 * pm)
, new System.Drawing.Point(12, 0)
, new System.Drawing.Point(15, 3 * pm)
, new System.Drawing.Point(18, 4 * pm)
, new System.Drawing.Point(21, 3 * pm)
, new System.Drawing.Point(24, 0)
};
using (var path = new System.Drawing.Drawing2D.GraphicsPath()) g.DrawLines(new System.Drawing.Pen(brush, 2f), p1);
g.RotateTransform(-angle);
g.TranslateTransform(-x1, -y1);
}
}
using (var path = new System.Drawing.Drawing2D.GraphicsPath())
{
System.Drawing.PointF[] points = new System.Drawing.PointF[] { };
if (m == 1 || m == 2 || m == 3) // star trek inverse
{
path.AddString(source
, new System.Drawing.FontFamily(family), 1, h * 0.75F
, new System.Drawing.PointF((w - size.Width) / 2F
, (h * 0.9F - size.Height) / 2F)
, System.Drawing.StringFormat.GenericTypographic);
points = new System.Drawing.PointF[] {
new System.Drawing.PointF(0, 0)
, new System.Drawing.PointF(w, 0)
, new System.Drawing.PointF(w * 0.2F, h)
, new System.Drawing.PointF(w * 0.8F, h)
};
}
else if (m == 4 || m == 5) // star trek
{
path.AddString(source, new System.Drawing.FontFamily(family), 1, h * 0.75F
, new System.Drawing.PointF((w - size.Width) / 2F
, (h * 1.2F - size.Height) / 2F + 2F)
, System.Drawing.StringFormat.GenericTypographic);
points = new System.Drawing.PointF[] { new System.Drawing.PointF(w * 0.2F, 0)
, new System.Drawing.PointF(w * 0.8F, 0)
, new System.Drawing.PointF(0, h)
, new System.Drawing.PointF(w, h) };
}
else if (m == 6 || m == 7) // grow from left
{
path.AddString(source, new System.Drawing.FontFamily(family), 1, h * 0.75F
, new System.Drawing.PointF((w * 1.15F - size.Width) / 2F
, (h - size.Height) / 2F)
, System.Drawing.StringFormat.GenericTypographic);
points = new System.Drawing.PointF[] {
new System.Drawing.PointF(0, h * 0.25F)
, new System.Drawing.PointF(w, 0)
, new System.Drawing.PointF(0, h * 0.75F)
, new System.Drawing.PointF(w, h)
};
}
else if (m == 8 || m == 9) // grow from right
{
path.AddString(source, new System.Drawing.FontFamily(family), 1, h * 0.75F
, new System.Drawing.PointF((w * 0.85F - size.Width) / 2F
, (h - size.Height) / 2F)
, System.Drawing.StringFormat.GenericTypographic);
points = new System.Drawing.PointF[] {
new System.Drawing.PointF(w * 0.1F, 0)
, new System.Drawing.PointF(w * 0.9F, h * 0.25F)
, new System.Drawing.PointF(w * 0.1F, h)
, new System.Drawing.PointF(w * 0.9F, h * 0.75F)
};
}
path.Warp(points, new System.Drawing.RectangleF(0, 0, w, h));
g.FillPath(System.Drawing.Brushes.White, path);
g.DrawPath(new System.Drawing.Pen(brush, 2F), path);
}
}
}
using (var thumb = new System.Drawing.Bitmap(128, 40
, System.Drawing.Imaging.PixelFormat.Format32bppArgb))
{
using (var g = System.Drawing.Graphics.FromImage(thumb))
{
g.CompositingQuality = System.Drawing.Drawing2D.CompositingQuality.HighQuality;
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.HighQualityBicubic;
System.Drawing.Rectangle tr = new System.Drawing.Rectangle(0, 0, thumb.Width, thumb.Height);
g.DrawImage(bmp, tr);
g.DrawRectangle(
new System.Drawing.Pen(System.Drawing.Brushes.White)
, new System.Drawing.Rectangle(0, 0, 127, 39));
}
using (var ms = new System.IO.MemoryStream())
{
((System.Drawing.Image)thumb).Save(ms
, System.Drawing.Imaging.ImageFormat.Png);
return(ms.ToArray());
}
}
}
}
catch { return(null); }
}
/// <summary>
/// Обрабатывает запрос на тестовую картинку с заданными размерами (Width and Height)
/// </summary>
public System.Web.Mvc.ActionResult GetImage(System.String w, System.String h)
{
// parse args
var width = System.Int32.Parse(w);
if (width <= 0)
{
throw new System.ArgumentOutOfRangeException("width", width, "Argument out of range, must be greater than zero.");
}
var height = System.Int32.Parse(h);
if (height <= 0)
{
throw new System.ArgumentOutOfRangeException("height", height, "Argument out of range, must be greater than zero.");
}
var text = "";
var random = new System.Random();
for (var i = 0; i < 6; i++)
{
text += random.Next(10);
}
// keep captcha key in session
this.Session["CAPTCHA"] = text;
// Create a CAPTCHA image and send it as response
System.Drawing.Bitmap image = null;
try
{
// Create a new 32-bit bitmap image.
image = new System.Drawing.Bitmap(width, height, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
// Create a graphics object for drawing.
var g = System.Drawing.Graphics.FromImage(image);
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
var rect = new System.Drawing.Rectangle(0, 0, width, height);
// Fill in the background.
var hatchBrush = new System.Drawing.Drawing2D.HatchBrush(System.Drawing.Drawing2D.HatchStyle.SmallConfetti, System.Drawing.Color.LightGray, System.Drawing.Color.White);
g.FillRectangle(hatchBrush, rect);
// Set up the text font.
System.Drawing.SizeF size;
var fontSize = rect.Height + 1;
System.Drawing.Font font;
// Adjust the font size until the text fits within the image.
do
{
fontSize--;
font = new System.Drawing.Font(System.Drawing.FontFamily.GenericSerif.Name, fontSize, System.Drawing.FontStyle.Bold);
size = g.MeasureString(text, font);
} while (size.Width > rect.Width);
// Set up the text format.
var format = new System.Drawing.StringFormat();
format.Alignment = System.Drawing.StringAlignment.Center;
format.LineAlignment = System.Drawing.StringAlignment.Center;
// Create a path using the text and warp it randomly.
var path = new System.Drawing.Drawing2D.GraphicsPath();
path.AddString(text, font.FontFamily, (System.Int32)font.Style, font.Size, rect, format);
var v = 4F;
var points = new System.Drawing.PointF[]
{
new System.Drawing.PointF(random.Next(rect.Width) / v, random.Next(rect.Height) / v),
new System.Drawing.PointF(rect.Width - random.Next(rect.Width) / v, random.Next(rect.Height) / v),
new System.Drawing.PointF(random.Next(rect.Width) / v, rect.Height - random.Next(rect.Height) / v),
new System.Drawing.PointF(rect.Width - random.Next(rect.Width) / v, rect.Height - random.Next(rect.Height) / v)
};
var matrix = new System.Drawing.Drawing2D.Matrix();
matrix.Translate(0F, 0F);
path.Warp(points, rect, matrix, System.Drawing.Drawing2D.WarpMode.Perspective, 0F);
// Draw the text.
hatchBrush = new System.Drawing.Drawing2D.HatchBrush(System.Drawing.Drawing2D.HatchStyle.LargeConfetti, System.Drawing.Color.LightGray, System.Drawing.Color.DarkGray);
g.FillPath(hatchBrush, path);
// Add some random noise.
int m = System.Math.Max(rect.Width, rect.Height);
for (var i = 0; i < (System.Int32)(rect.Width * rect.Height / 30F); i++)
{
g.FillEllipse(hatchBrush, random.Next(rect.Width), random.Next(rect.Height), random.Next(m / 50), random.Next(m / 50));
}
// Clean up.
font.Dispose();
hatchBrush.Dispose();
g.Dispose();
// send image response
var converter = new System.Drawing.ImageConverter();
return(this.File((System.Byte[])converter.ConvertTo(image, typeof(System.Byte[])), "image/jpeg"));
}
finally
{
if (image != null)
{
image.Dispose();
}
}
}
protected void GenerateImage()
{
Random random = new Random();
// Create a new 32-bit bitmap image.
Bitmap bitmap = new Bitmap(230,37,PixelFormat.Format32bppArgb);
// Create a graphics object for drawing.
System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bitmap);
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
Rectangle rect = new Rectangle(0, 0, 230, 37);
// Fill in the background.
System.Drawing.Drawing2D.HatchBrush hatchBrush = new System.Drawing.Drawing2D.HatchBrush(System.Drawing.Drawing2D.HatchStyle.Percent50, Color.LightGray, Color.White);
//SolidBrush hatchBrush = new SolidBrush(Color.Red);
String strText =(String)Session["ImageSID"];
g.FillRectangle(hatchBrush, rect);
// Set up the text font.
SizeF size;
float fontSize = rect.Height -12;
// Adjust the font size until the text fits within the image.
Font font = new Font("Century Schoolbook",fontSize, FontStyle.Bold);
size = g.MeasureString(strText, font);
// Set up the text format.
StringFormat format = new StringFormat();
format.Alignment = StringAlignment.Center;
format.LineAlignment = StringAlignment.Center;
// Create a path using the text and warp it randomly.
System.Drawing.Drawing2D.GraphicsPath path = new System.Drawing.Drawing2D.GraphicsPath();
path.AddString(
strText,
font.FontFamily,
(int)font.Style,
font.Size, rect,
format);
float v = 12F;
PointF[] points =
{
new PointF(
random.Next(rect.Width) / v,
random.Next(rect.Height) / v),
new PointF(
rect.Width - random.Next(rect.Width) / v,
random.Next(rect.Height) / v),
new PointF(
random.Next(rect.Width) / v,
rect.Height - random.Next(rect.Height) / v),
new PointF(
rect.Width - random.Next(rect.Width) / v,
rect.Height - random.Next(rect.Height) / v)
};
//points={0,0,0,0};
System.Drawing.Drawing2D.Matrix matrix = new System.Drawing.Drawing2D.Matrix();
matrix.Translate(0F, 0F);
path.Warp(points, rect, matrix, System.Drawing.Drawing2D.WarpMode.Perspective, 0F);
// Draw the text.
hatchBrush = new System.Drawing.Drawing2D.HatchBrush(
System.Drawing.Drawing2D.HatchStyle.Percent50,
Color.LightSlateGray,
Color.DarkGray);
g.FillPath(hatchBrush, path);
// Add some random noise.
int m = Math.Max(rect.Width, rect.Height);
for (int i = 0; i < (int)(rect.Width * rect.Height / 30F); i++)
{
int x = random.Next(rect.Width);
int y = random.Next(rect.Height);
int w = random.Next(m / 50);
int h = random.Next(m / 50);
g.FillEllipse(hatchBrush, x, y, w, h);
}
// Clean up.
font.Dispose();
hatchBrush.Dispose();
g.Dispose();
// Set the image.
this.Response.Clear();
this.Response.ContentType = "image/jpeg";
// Write the image to the response stream in JPEG format.
bitmap.Save(this.Response.OutputStream, ImageFormat.Jpeg);
// Dispose of the CAPTCHA image object.
bitmap.Dispose();
}
// ====================================================================
// Creates the bitmap image.
// ====================================================================
private void GenerateImage()
{
// Create a new 32-bit bitmap image.
System.Drawing.Bitmap bitmap = new System.Drawing.Bitmap(this.width, this.height
, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
// Create a graphics object for drawing.
System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(bitmap);
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
System.Drawing.Rectangle rect = new System.Drawing.Rectangle(0, 0, this.width, this.height);
// Fill in the background.
System.Drawing.Drawing2D.HatchBrush hatchBrush =
new System.Drawing.Drawing2D.HatchBrush(
System.Drawing.Drawing2D.HatchStyle.SmallConfetti
, System.Drawing.Color.LightGray
, System.Drawing.Color.White);
g.FillRectangle(hatchBrush, rect);
// Set up the text font.
System.Drawing.SizeF size;
float fontSize = rect.Height + 1;
System.Drawing.Font font;
// Adjust the font size until the text fits within the image.
do
{
fontSize--;
font = new System.Drawing.Font(this.familyName, fontSize, System.Drawing.FontStyle.Bold);
size = g.MeasureString(this.text, font);
} while (size.Width > rect.Width);
// Set up the text format.
System.Drawing.StringFormat format = new System.Drawing.StringFormat();
format.Alignment = System.Drawing.StringAlignment.Center;
format.LineAlignment = System.Drawing.StringAlignment.Center;
// Create a path using the text and warp it randomly.
System.Drawing.Drawing2D.GraphicsPath path = new System.Drawing.Drawing2D.GraphicsPath();
path.AddString(this.text, font.FontFamily, (int)font.Style, font.Size, rect, format);
float v = 4F;
System.Drawing.PointF[] points =
{
new System.Drawing.PointF(this.random.Next(rect.Width) / v, this.random.Next(rect.Height) / v),
new System.Drawing.PointF(rect.Width - this.random.Next(rect.Width) / v, this.random.Next(rect.Height) / v),
new System.Drawing.PointF(this.random.Next(rect.Width) / v, rect.Height - this.random.Next(rect.Height) / v),
new System.Drawing.PointF(rect.Width - this.random.Next(rect.Width) / v, rect.Height - this.random.Next(rect.Height) / v)
};
System.Drawing.Drawing2D.Matrix matrix = new System.Drawing.Drawing2D.Matrix();
matrix.Translate(0F, 0F);
path.Warp(points, rect, matrix, System.Drawing.Drawing2D.WarpMode.Perspective, 0F);
// Draw the text.
hatchBrush = new System.Drawing.Drawing2D.HatchBrush(
System.Drawing.Drawing2D.HatchStyle.LargeConfetti
, System.Drawing.Color.LightGray
, System.Drawing.Color.DarkGray);
g.FillPath(hatchBrush, path);
// Add some random noise.
int m = System.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);
}
// Clean up.
font.Dispose();
hatchBrush.Dispose();
g.Dispose();
// Set the image.
this.image = bitmap;
}
private byte[] GenerateCaptchaImage(string text, int width, int height)
{
Random random = new Random(int.Parse(Guid.NewGuid().ToString().Substring(0, 8), System.Globalization.NumberStyles.HexNumber));
System.Drawing.Font font;
System.Drawing.Bitmap bmp = new System.Drawing.Bitmap(width, height, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
System.Drawing.Graphics graphics = System.Drawing.Graphics.FromImage(bmp);
graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
System.Drawing.Rectangle rect = new System.Drawing.Rectangle(0, 0, width, height);
System.Drawing.Drawing2D.HatchBrush brush = new System.Drawing.Drawing2D.HatchBrush(System.Drawing.Drawing2D.HatchStyle.SmallConfetti, System.Drawing.Color.LightGray, System.Drawing.Color.White);
graphics.FillRectangle(brush, rect);
float emSize = rect.Height + 1;
do {
emSize--;
font = new System.Drawing.Font(System.Drawing.FontFamily.GenericSansSerif, emSize, System.Drawing.FontStyle.Bold);
} while (graphics.MeasureString(text, font).Width > rect.Width);
System.Drawing.StringFormat format = new System.Drawing.StringFormat {
Alignment = System.Drawing.StringAlignment.Center,
LineAlignment = System.Drawing.StringAlignment.Center
};
System.Drawing.Drawing2D.GraphicsPath path = new System.Drawing.Drawing2D.GraphicsPath();
path.AddString(text, font.FontFamily, (int)font.Style, 75f, rect, format);
float num2 = 4f;
System.Drawing.PointF[] destPoints = new System.Drawing.PointF[] { new System.Drawing.PointF(((float)random.Next(rect.Width)) / num2, ((float)random.Next(rect.Height)) / num2), new System.Drawing.PointF(rect.Width - (((float)random.Next(rect.Width)) / num2), ((float)random.Next(rect.Height)) / num2), new System.Drawing.PointF(((float)random.Next(rect.Width)) / num2, rect.Height - (((float)random.Next(rect.Height)) / num2)), new System.Drawing.PointF(rect.Width - (((float)random.Next(rect.Width)) / num2), rect.Height - (((float)random.Next(rect.Height)) / num2)) };
System.Drawing.Drawing2D.Matrix matrix = new System.Drawing.Drawing2D.Matrix();
matrix.Translate(0f, 0f);
path.Warp(destPoints, rect, matrix, System.Drawing.Drawing2D.WarpMode.Perspective, 0f);
brush = new System.Drawing.Drawing2D.HatchBrush(System.Drawing.Drawing2D.HatchStyle.Percent10, System.Drawing.Color.Black, System.Drawing.Color.SkyBlue);
graphics.FillPath(brush, path);
int num3 = Math.Max(rect.Width, rect.Height);
for (int i = 0; i < ((int)(((float)(rect.Width * rect.Height)) / 30f)); i++) {
int x = random.Next(rect.Width);
int y = random.Next(rect.Height);
int w = random.Next(num3 / 50);
int h = random.Next(num3 / 50);
graphics.FillEllipse(brush, x, y, w, h);
}
font.Dispose();
brush.Dispose();
graphics.Dispose();
System.IO.MemoryStream imageStream = new System.IO.MemoryStream();
bmp.Save(imageStream, System.Drawing.Imaging.ImageFormat.Jpeg);
byte[] imageContent = new Byte[imageStream.Length];
imageStream.Position = 0;
imageStream.Read(imageContent, 0, (int)imageStream.Length);
return imageContent;
}
