c#使用Matrix执行缩放

1. using System;
2. using System.Collections.Generic;
3. using System.ComponentModel;
4. using System.Data;
5. using System.Drawing;
6. using System.Text;
7. using System.Windows.Forms;
8. using System.Drawing.Drawing2D;
9. namespace advanced_drawing
10. {
11. public partial class Form4 : Form
12. {
13. public Form4()
14. {
15. InitializeComponent();
16. }
18. private void button1_Click(object sender, EventArgs e)
19. {
20. //使用转换将单位设置为英寸
21. Graphics g=this.CreateGraphics();
22. Matrix matrix = new Matrix();
23. matrix.Scale(g.DpiX, g.DpiY);
24. g.Transform = matrix;
26. Font rulerFont = new Font("MS Sans Serif", 8.25f / g.DpiY);
27. Pen blackPen=new Pen(Color.Black,0);
28. float rulerFontHeight = rulerFont.GetHeight(g);
29. RectangleF rulerRect = new RectangleF(0, 0, 6.5f, rulerFontHeight * 1.5f);
30. g.DrawRectangle(blackPen, rulerRect.X, rulerRect.Y, rulerRect.Width, rulerRect.Height);
31. Brush brush = System.Drawing.Brushes.Red;
32. g.DrawString("zhuzhao", rulerFont, brush, rulerRect);
33. }
34. }
35. }