public Bitmap GrabScreenshot(GLForm frm)
{
if (GraphicsContext.CurrentContext == null)
throw new GraphicsContextMissingException();
int Width = frm.glControl1.ClientSize.Width;
int Height = frm.glControl1.ClientSize.Height;
Bitmap bmp = new Bitmap(frm.glControl1.ClientSize.Width, Height);
System.Drawing.Imaging.BitmapData data =
bmp.LockBits(new Rectangle(0, 0, Width, Height), System.Drawing.Imaging.ImageLockMode.WriteOnly, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
GL.ReadPixels(0, 0, Width, Height, OpenTK.Graphics.PixelFormat.Bgr, PixelType.UnsignedByte, data.Scan0);
bmp.UnlockBits(data);
bmp.RotateFlip(RotateFlipType.RotateNoneFlipY);
return bmp;
}
