protected Drawing.Bitmap CombineBitmap(Drawing.Bitmap bmp1, Drawing.Bitmap bmp2)
{
int
w = bmp1.Width + bmp2.Width,
h = Math.Max(bmp1.Height, bmp2.Height);
var result = new Drawing.Bitmap(w, h);
using (System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(result))
{
int
l = 0,
t = (h - bmp1.Height) / 2;
g.DrawImage(bmp1, l, t, bmp1.Width, bmp1.Height);
l = bmp1.Width;
t = (h - bmp2.Height) / 2;
g.DrawImage(bmp2, l, t + 4, bmp2.Width, bmp2.Height);
}
return(result);
}
public static Bitmap Rotate(Bitmap b, int angle)
{
angle = angle % 360;
//弧度转换
double radian = angle * Math.PI / 180.0;
double cos = Math.Cos(radian);
double sin = Math.Sin(radian);
//原图的宽和高
int w = b.Width;
int h = b.Height;
int W = (int)(Math.Max(Math.Abs(w * cos - h * sin), Math.Abs(w * cos + h * sin)));
int H = (int)(Math.Max(Math.Abs(w * sin - h * cos), Math.Abs(w * sin + h * cos)));
//目标位图
Bitmap dsImage = new Bitmap(W, H);
System.Drawing.Graphics g = System.Drawing.Graphics.FromImage(dsImage);
g.InterpolationMode = System.Drawing.Drawing2D.InterpolationMode.Bilinear;
g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
//计算偏移量
Point Offset = new Point((W - w) / 2, (H - h) / 2);
//构造图像显示区域：让图像的中心与窗口的中心点一致
Rectangle rect = new Rectangle(Offset.X, Offset.Y, w, h);
Point center = new Point(rect.X + rect.Width / 2, rect.Y + rect.Height / 2);
g.TranslateTransform(center.X, center.Y);
g.RotateTransform(360 - angle);
//恢复图像在水平和垂直方向的平移
g.TranslateTransform(-center.X, -center.Y);
g.DrawImage(b, rect);
//重至绘图的所有变换
g.ResetTransform();
g.Save();
g.Dispose();
//dsImage.Save("yuancd.jpg", System.Drawing.Imaging.ImageFormat.Jpeg);
return(dsImage);
}
