C# 将正方形头像转化成圆形头像(例如:qq头像)
转载于:http://blog.****.net/chinacsharper/article/details/50854852
看图:
点击转化后效果:
实现代码如下:
private void button1_Click(object sender, EventArgs e)
{
Image image = this.pictureBox1.Image;
Image newImage = CutEllipse(image, new Rectangle(0, 0, 194, 194), new Size(194, 194));
this.pictureBox2.Image = newImage;
this.pictureBox1.Image = newImage;
}
private Image CutEllipse(Image img, Rectangle rec, Size size)
{
Bitmap bitmap = new Bitmap(size.Width, size.Height);
using (Graphics g = Graphics.FromImage(bitmap))
{
using (TextureBrush br = new TextureBrush(img, System.Drawing.Drawing2D.WrapMode.Clamp, rec))
{
br.ScaleTransform(bitmap.Width / (float)rec.Width, bitmap.Height / (float)rec.Height);
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
g.FillEllipse(br, new Rectangle(Point.Empty, size));
}
}
return bitmap;
}