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); }