Extracts ctrulib's default_font.bin to a transparent .png file

ctrufont2png.cs

using System;
using System.IO;
using System.Drawing;

class Program
{
    static Color transparent = Color.FromArgb(0, 0, 0, 0);
    static Color black = Color.FromArgb(0xFF, 0, 0, 0);
    
    public static void Main(String[] args)
    {
        using(FileStream fs = File.OpenRead("default_font.bin"))
        {
            using(BinaryReader br = new BinaryReader(fs))
            {
                using(FileStream wfs = File.OpenWrite("ctrufont.png"))
                {
                    using(Bitmap bmp = new Bitmap(16 * 8, 16 * 8, System.Drawing.Imaging.PixelFormat.Format32bppArgb))
                    {
                        for(int y = 0; y != 16; y++)
                        {
                            for(int x = 0; x != 16; x++)
                            {
                                for(int i = 0; i != 8; i++)
                                {
                                    int b = br.ReadByte();
                                    
                                    for(int j = 7; j != -1; j--)
                                    {
                                        bmp.SetPixel((x * 8) + j, (y * 8) + i, (b & 1) == 0 ? transparent : black);
                                        b >>= 1;
                                    }
                                }
                            }
                        }
                        
                        bmp.Save(wfs, System.Drawing.Imaging.ImageFormat.Png);
                    }
                }
            }
        }
    }
}