【九宫切图】什么是九宫绘图

- 日理万妓 2022-08-13 14:43 146阅读 0赞

本文转载于：CSKIN论坛，地址：[http://bbs.cskin.net/thread-62-1-1.html][http_bbs.cskin.net_thread-62-1-1.html]

下面贴下核心代码

public static void RenderBackground(Graphics g, Image img, Rectangle rect) {
        //填充四个角
        g.DrawImage(img, new Rectangle(rect.X, rect.Y, 5, 5), 
            new Rectangle(0, 0, 5, 5), GraphicsUnit.Pixel);
        g.DrawImage(img, new Rectangle(rect.Right - 5, rect.Y, 5, 5), 
            new Rectangle(img.Width - 5, 0, 5, 5), GraphicsUnit.Pixel);
        g.DrawImage(img, new Rectangle(rect.X, rect.Bottom - 5, 5, 5), 
            new Rectangle(0, img.Height - 5, 5, 5), GraphicsUnit.Pixel);
        g.DrawImage(img, new Rectangle(rect.Right - 5, rect.Bottom - 5, 5, 5), 
            new Rectangle(img.Width - 5, img.Height - 5, 5, 5), GraphicsUnit.Pixel);
        //四边
        g.DrawImage(img, new Rectangle(rect.X, rect.Y + 5, 5, rect.Height - 10), 
            new Rectangle(0, 5, 5, img.Height - 10), GraphicsUnit.Pixel);
        g.DrawImage(img, new Rectangle(rect.X + 5, rect.Y, rect.Width - 10, 5), 
            new Rectangle(5, 0, img.Width - 10, 5), GraphicsUnit.Pixel);
        g.DrawImage(img, new Rectangle(rect.Right - 5, rect.Y + 5, 5, rect.Height - 10), 
            new Rectangle(img.Width - 5, 5, 5, img.Height - 10), GraphicsUnit.Pixel);
        g.DrawImage(img, new Rectangle(rect.X + 5, rect.Bottom - 5, rect.Width - 10, 5), 
            new Rectangle(5, img.Height - 5, img.Width - 10, 5), GraphicsUnit.Pixel);
        //中间
        g.DrawImage(img, 
            new Rectangle(rect.X + 5, rect.Y + 5, rect.Width - 10, rect.Height - 10), 
            new Rectangle(5, 5, img.Width - 10, img.Height - 10), GraphicsUnit.Pixel);
     
    }

public class TestA : Control
    {
        protected override void OnPaint(PaintEventArgs e) {
            RenderHelper.RenderBackground(
                e.Graphics,
                Properties.Resources.Qbtn_Gray,//资源图
                this.ClientRectangle);
            base.OnPaint(e);
        }
    }

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