Question

I have the following function:

static private Image CropRotate(Image wholeImage, Rectangle cropArea)
{
    Bitmap cropped = new Bitmap(cropArea.Width, cropArea.Height);

    using(Graphics g = Graphics.FromImage(cropped))
    {
        g.DrawImage(wholeImage, new Rectangle(0, 0, cropArea.Width, cropArea.Height), cropArea, GraphicsUnit.Pixel);
        g.RotateTransform(180f);
    }
    return cropped as Image;
}

It’s supposed to crop an image, then rotate the resulting sub-image. In actuality though, it only performs the crop.

Why is RotateTransform() not being applied?

Answer 1

Have you tried putting the RotateTransform() before the DrawImage()?
The example on the msdn page shows the transformation being applied before any drawing is done.