// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
 
using System.ComponentModel;
 
namespace System.Drawing;
 
public abstract unsafe class Brush : MarshalByRefObject, ICloneable, IDisposable
{
    // Handle to native GDI+ brush object to be used on demand.
    private GpBrush* _nativeBrush;
 
    public abstract object Clone();
 
    protected internal void SetNativeBrush(IntPtr brush) => SetNativeBrushInternal((GpBrush*)brush);
    internal void SetNativeBrushInternal(GpBrush* brush) => _nativeBrush = brush;
 
    [Browsable(false), EditorBrowsable(EditorBrowsableState.Never)]
    internal GpBrush* NativeBrush => _nativeBrush;
 
    public void Dispose()
    {
        Dispose(true);
        GC.SuppressFinalize(this);
    }
 
    protected virtual void Dispose(bool disposing)
    {
        if (_nativeBrush is not null)
        {
            Status status = !Gdip.Initialized ? Status.Ok : PInvoke.GdipDeleteBrush(_nativeBrush);
            _nativeBrush = null;
            Debug.Assert(status == Status.Ok, $"GDI+ returned an error status: {status}");
        }
    }
 
    ~Brush() => Dispose(disposing: false);
}