// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.

using System.Drawing;

namespace System.Windows.Forms;

internal static partial class GdiCache
{
    /// <summary>
    ///  Scope that creates a wrapping <see cref="Drawing.Graphics"/> for a <see cref="ScreenDcCache.ScreenDcScope"/>
    ///  and manages disposal of the <see cref="Drawing.Graphics"/> and the scope.
    /// </summary>
#if DEBUG
    internal class ScreenGraphicsScope : DisposalTracking.Tracker, IDisposable
#else
    internal readonly ref struct ScreenGraphicsScope
#endif
    {
        private readonly ScreenDcCache.ScreenDcScope _dcScope;
        public Graphics Graphics { get; }

        public ScreenGraphicsScope(scoped ref ScreenDcCache.ScreenDcScope scope)
        {
            _dcScope = scope;
            Graphics = scope.HDC.CreateGraphics();
        }

        public static implicit operator Graphics(in ScreenGraphicsScope scope) => scope.Graphics;

        public void Dispose()
        {
            Graphics?.Dispose();
            _dcScope.Dispose();
            DisposalTracking.SuppressFinalize(this!);
        }
    }
}
