public Mat rotate(Mat img, RotateFlags flags)
{
var dst = new Mat();
cv2_native_api.core_rotate(img.InputArray, dst.OutputArray, (int)flags);
return(dst);
}
// General rotation about image center
/// <summary>
/// (1) This is a high-level, simple interface for rotating images
/// about their center.
/// (2) For very small rotations, just return a clone.
/// (3) Rotation brings either white or black pixels in
/// from outside the image.
/// (4) The rotation type is adjusted if necessary for the image
/// depth and size of rotation angle.For 1 bpp images, we
/// rotate either by shear or sampling.
/// (5) Colormaps are removed for rotation by area mapping.
/// (6) The dest can be expanded so that no image pixels
/// are lost.To invoke expansion, input the original
/// width and height. For repeated rotation, use of the
/// original width and height allows the expansion to
/// stop at the maximum required size, which is a square
/// with side = sqrt(w * w + h * h).
/// </summary>
/// <param name="pixs">1, 2, 4, 8, 32 bpp rgb</param>
/// <param name="angle">radians; clockwise is positive</param>
/// <param name="type">L_ROTATE_AREA_MAP, L_ROTATE_SHEAR, L_ROTATE_SAMPLING</param>
/// <param name="incolor">L_BRING_IN_WHITE, L_BRING_IN_BLACK</param>
/// <param name="width">original width; use 0 to avoid embedding</param>
/// <param name="height">original height; use 0 to avoid embedding</param>
/// <returns>pixd, or NULL on error</returns>
public static Pix pixRotate(this Pix pixs, float angle, RotateFlags type, BackgroundFlags incolor, int width, int height)
{
if (null == pixs)
{
throw new ArgumentNullException("pixs cannot be null.");
}
var pointer = Native.DllImports.pixRotate((HandleRef)pixs, angle, type, incolor, width, height);
if (IntPtr.Zero == pointer)
{
return(null);
}
else
{
return(new Pix(pointer));
}
}
