// load a bitmap font called "04b03", with bitmap "fonts/04b03.png"
// each character on bitmap has a size of (6, 8), and contains default ASCII_CHARS
loadBitmapFont("04b03", "fonts/04b03.png", 6, 8);
// load a font with custom characters
loadBitmapFont("myfont", "myfont.png", 6, 8, { chars: "☺☻♥♦♣♠" });