// -----------------------------------------------------------------------------
// file="ImageHelper"
// Project: StgSharp
// Copyright (c) Nitload.
// SPDX-License-Identifier: MIT
// -----------------------------------------------------------------------------

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Text;

namespace StgSharp.Graphics
{
    public static class ImageHelper
    {

        public static void Resize(
                           Image i,
                           int width,
                           int height,
                           ImageMovement move
        )
        {
            if (i == null) {
                throw new ArgumentNullException(nameof(i));
            }
            if (i.Size == (width, height)) {
                return;
            }
            if (!Enum.IsDefined(typeof(ImageMovement), move)) {
                throw new InvalidEnumArgumentException(nameof(move));
            }
            byte[] oldData = i.Data;
            i.Data = new byte[width * height * i.PixelSize];
            i.Height = height;
            i.Width = width;
            i.PixelUpdateCount++;
            switch (move)
            {
                case ImageMovement.Discard:
                    break;
                case ImageMovement.Top:
                    break;
                default:
                    throw new NotImplementedException();
            }
        }

    }

    [Flags]
    public enum ImageMovement
    {
#pragma warning disable CA1008 
        Discard = 0,
        #pragma warning restore CA1008 
        Top = 1,
        Bottom = 2,
        Left = 4,
        Right = 8,
        TopLeft = Top | Left,
        BottomLeft = Bottom | Left,
        TopRight = Top | Right,
        BottomRight = Bottom | Right,

    }
}