图像的绘制,剪切,旋转,添加文字.生成图像的缩略图

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图像的绘制,剪切,旋转,添加文字.生成图像的缩略图

2011年05月07日 ⁄ 综合 ⁄ 共 4402字 ⁄ 字号小中大 ⁄ 评论关闭

图像的绘制,剪切,旋转,添加文字.生成图像的缩略图

//按指定大小绘制图像
2

private void button1_Click(object sender, System.EventArgs e)
3

{
4

Bitmap myImage = new Bitmap(@"c:\11.jpg");
5

Graphics g=this.pictureBox1.CreateGraphics();
6

Pen pen = new Pen(Color.FromArgb(0, 0, 0));
7

int width =this.pictureBox1.Width-100 ;
8

int height =this.pictureBox1.Height-100 ;
9

int x =2;
10

int y =2;
11

//设定图像的绘制区域
12

g.DrawRectangle(pen, x - 1, y - 1, width + 1, height + 1);
13

//设定图像的绘制质量
14

g.InterpolationMode = InterpolationMode.HighQualityBilinear;
15

//绘制图像
16

g.DrawImage(myImage, x, y, width, height);
17

pen.Dispose();
18

}

1private void button2_Click(object sender, System.EventArgs e)
2        {
3            //以正常方式显示图片
4            Bitmap myImage = new Bitmap(@"c:\11.jpg");
5            Graphics g=this.pictureBox1.CreateGraphics();
6            g.DrawImage(myImage, 29, 20);
7            //以旋转方式显示图片
8           // g.Clear(Color.Yellow ) ;  //如果不清除将在上次的基础上绘制
9            g.RotateTransform(-30);
10            g.DrawImage(myImage, 100, 380);
11            g.ResetTransform();
12
13
14
15        }
16
17        private void button3_Click(object sender, System.EventArgs e)
18        {
19            Bitmap myImage = new Bitmap(@"c:\11.jpg");
20            //设定一块显示区域
21            this.pictureBox1.Image =myImage;
22            //创建画布
23            Graphics g=Graphics.FromImage (this.pictureBox1.Image  );
24            //设定要显示的字符
25            String drawString = "老婆你好!";
26            //设置字体与画刷
27            Font drawFont = new Font("隶书", 20);
28            SolidBrush drawBrush = new SolidBrush(Color.Black);
29            //设定显示的区域
30            PointF drawPoint = new PointF(150.0F, 50.0F);
31            //设定字符串的格式
32            StringFormat drawFormat = new StringFormat();
33            drawFormat.FormatFlags = StringFormatFlags.DirectionVertical;
34            //绘制字符至屏幕
35            g.DrawString(drawString, drawFont, drawBrush, drawPoint, drawFormat);
36            drawPoint = new PointF(150.0F+120.0F , 50.0F+250.0F);
37            drawFont = new Font("隶书", 10);
38            g.DrawString("furenjun", drawFont, drawBrush, drawPoint, drawFormat);
39            drawPoint = new PointF(150.0F+60.0F+120.0F , 50.0F+250.0F+50.0F);
40            drawFont = new Font("隶书", 6);
41            g.DrawString(System.DateTime.Now.ToString ()   , drawFont, drawBrush, drawPoint, drawFormat);
42            //保存图像
43            this.pictureBox1.Refresh ();
44            this.pictureBox1.Image.Save(@"c:\mfu.jpg",System.Drawing.Imaging.ImageFormat.Jpeg );
45
46
47
48        }
49
50        private void button4_Click(object sender, System.EventArgs e)
51        {
52            if (this.openFileDialog1.ShowDialog()==DialogResult.OK)
53            {
54                //获取图像
55                Bitmap myBitmap = new Bitmap(this.openFileDialog1.FileName  );
56                //设定图像剪切区域
57                RectangleF cloneRect = new RectangleF(0, 0, 100, 100);
58                PixelFormat format = myBitmap.PixelFormat;
59                Bitmap cloneBitmap = myBitmap.Clone(cloneRect, format);
60                //绘制剪切的图像
61                Graphics g=this.pictureBox1.CreateGraphics();
62                //                g.DrawImage(cloneBitmap, 0, 0);
63
64                //生成图像的缩略图
65                Image.GetThumbnailImageAbort myCallback =
66                    new Image.GetThumbnailImageAbort(ThumbnailCallback);
67
68                Image myThumbnail = myBitmap.GetThumbnailImage(
69                    40, 60, myCallback, IntPtr.Zero);
70                this.pictureBox1.Image = myThumbnail;
71                //g.DrawImage(myThumbnail, 150, 75);
72
73                MessageBox.Show( myBitmap.FrameDimensionsList.ToString() +"\n" +myBitmap.HorizontalResolution.ToString()    ) ;
74
75            }
76
77        }
78        public bool ThumbnailCallback()
79        {
80            return false;
81        }