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  1. using System;
  2. using System.Collections.Generic;
  3. using System.ComponentModel;
  4. using System.Data;
  5. using System.Drawing;
  6. using System.Linq;
  7. using System.Text;
  8. using System.Windows.Forms;
  9.  
  10. using System.Drawing.Drawing2D;
  11. using System.Drawing.Imaging;
  12.  
  13. namespace WindowsFormsApplication1
  14. {
  15.     public partial class Form1 : Form
  16.     {
  17.         public Form1()
  18.         {
  19.             InitializeComponent();
  20.         }
  21.  
  22.         private void Form1_Load(object sender, EventArgs e)
  23.         {
  24.             const int w = 640;
  25.             const int h = 480;
  26.             Bitmap bmp1 = new Bitmap(w, h, PixelFormat.Format32bppArgb);
  27.             using (Graphics g = Graphics.FromImage(bmp1))
  28.             {
  29.                 g.SmoothingMode = SmoothingMode.AntiAlias;
  30.                 g.FillRectangle(Brushes.Transparent, 0, 0, w, h);
  31.                 g.FillEllipse(Brushes.Blue, 0, 0, w, h);
  32.             }
  33.             Bitmap bmp2 = new Bitmap(w, h, PixelFormat.Format32bppArgb);
  34.             using (Graphics g = Graphics.FromImage(bmp2))
  35.             {
  36.                 g.SmoothingMode = SmoothingMode.AntiAlias;
  37.                 g.FillRectangle(Brushes.Gray, 0, 0, w, h);
  38.  
  39.                 Matrix m = new Matrix();
  40.                 m.Scale(0.5f, 0.5f);
  41.                 g.Transform = m;
  42.  
  43.                 g.DrawImage(bmp1,0,0);
  44.  
  45.                 m.Reset();
  46.                 g.Transform = m;
  47.             }
  48.             PictureBox p = new PictureBox();
  49.             p.Dock = DockStyle.Fill;
  50.             this.Controls.Add(p);
  51.             this.ClientSize = new Size(w, h);
  52.             p.Image = bmp2;
  53.         }
  54.     }
  55. }
  56.  
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https://ideone.com/d64st
language:
C# (gmcs 5.20.1)
created:
12 years ago
visibility:
public

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