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

#nullable enable

using System.Drawing;
using System.Runtime.InteropServices;

namespace System.Windows.Forms.Metafiles;

[StructLayout(LayoutKind.Sequential)]
internal struct EMRTEXT
{
    public Point ptlReference;
    public uint nChars;
    public uint offString;          // Offset to the string
    public uint fOptions;
    public RECT rcl;
    public uint offDx;              // Offset to the inter-character spacing array.

    public unsafe ReadOnlySpan<char> GetText()
    {
        int offset = (int)offString - sizeof(EMREXTTEXTOUTW) + sizeof(EMRTEXT);
        fixed (Point* p = &ptlReference)
        {
            byte* b = (byte*)(void*)p;
            b += offset;
            return new ReadOnlySpan<char>(b, (int)nChars);
        }
    }
}
