// Create a new 32-bit bitmap image.
Bitmap bitmap = new Bitmap(this.width, this.height, PixelFormat.Format32bppArgb);

// Create a graphics object for drawing.
Graphics g = Graphics.FromImage(bitmap);
g.SmoothingMode = SmoothingMode.AntiAlias;
Rectangle rect = new Rectangle(0, 0, this.width, this.height);

// Fill in the background.
HatchBrush hatchBrush = new HatchBrush(HatchStyle.SmallConfetti, Color.LightGray, Color.White);
g.FillRectangle(hatchBrush, rect);

// Set up the text font.
SizeF size;
float fontSize = rect.Height + 1;
Font font;
// Adjust the font size until the text fits within the image.
do
{
    fontSize--;
    font = new Font(this.familyName, fontSize, FontStyle.Bold);
    size = g.MeasureString(this.text, font);
} while (size.Width > rect.Width);

// 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.
GraphicsPath path = new GraphicsPath();
//text - 文字内容
path.AddString(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);

// Draw the text.
hatchBrush = new HatchBrush(HatchStyle.LargeConfetti, Color.DarkGray, Color.DarkGray);
g.FillPath(hatchBrush, path);

// Clean up.
font.Dispose();
hatchBrush.Dispose();
g.Dispose();