3rdpartylibs/fastreports.wpf/FastReport.Base/Utils/FontManager.Gdi.cs

// available in FR.OS, FR.NET, FR.WPF
#if !SKIA && !FRCORE && (!MONO || WPF)
using System;
using System.Diagnostics;
using System.Drawing.Text;
using System.IO;

namespace FastReport
{
    public static partial class FontManager
    {
        /// <summary>
        /// Adds a font from the specified file to this collection.
        /// </summary>
        /// <param name="filename">A System.String that contains the file name of the font to add.</param>
        /// <returns>true if the font is registered by application.</returns>
        public static bool AddFont(string filename)
        {
            bool success = false;
            if (File.Exists(filename))
            {
                PrivateFontCollection.AddFontFile(filename);
                success = true;
            }
            else
            {
                Debug.WriteLine($"Font file '{filename}' not found");
            }
            return success;
        }

        /// <summary>
        /// Adds a font contained in system memory to this collection.
        /// </summary>
        /// <param name="memory">The memory address of the font to add.</param>
        /// <param name="length">The memory length of the font to add.</param>
        public static void AddFont(IntPtr memory, int length)
        {
            PrivateFontCollection.AddMemoryFont(memory, length);
        }
    }
}
#endif