Rotates the transform.
Syntax

[C#]

void RotateTransform(double angle);
void RotateTransform(double angle, MatrixOrder order);

[Visual Basic]

Sub RotateTransform(angle As Double)
Sub RotateTransform(angle As Double, order As MatrixOrder)
Params
Name Description
angle The angle in degrees.
order The matrix order to use.
Notes

None.

Example

The following code will rotate an image by 45 degrees and enlarge it a bit. To make sure the image is fully visible we also need to translate it so that all the corners are visible. To determine this we transform the corners and convert them into a bounds rectangle. Then we can translate the image so that it appears at the origin and we can resize the Bitmap so that it is is the right size.

[C#]using (Image image = Bitmap.FromFile(Server.MapPath("rez/felix-tchverkin-7pkN83wDZwY-unsplash.jpg"))) {
  using (Bitmap bm = new Bitmap(new Size())) {
    using (Graphics graphics = Graphics.FromImage(bm)) {
      graphics.RotateTransform(45);
      graphics.ScaleTransform(1.3, 1.3);
      PointF[] corners = ((RectangleF)image.Bounds).Corners;
      graphics.Transform.TransformPoints(corners);
      Rectangle bounds = (Rectangle)RectangleF.FromPoints(corners);
      graphics.TranslateTransform(-bounds.Left, -bounds.Top, MatrixOrder.Append);
      graphics.DrawImage(image, image.Bounds);
      bm.Resize(bounds.Width, bounds.Height);
    }
    bm.Save(Server.MapPath($"IG8_Graphics_RotateTransform.jpg"));
  }
}



felix-tchverkin-7pkN83wDZwY-unsplash.jpg


IG8_Graphics_RotateTransform.jpg