Font Loader API

struct BmFontTagXml {
}

struct BmFontTagTxt {
}

struct BmFontTagBin {
}

struct FontInfo {
    base: Int
    line_height: Int
    size: Int
}

struct Glyph {
    ch: Char
    height: Int
    width: Int
    x: Int

    x_advance: Int
    x_offset: Int
    y: Int
    y_offset: Int
}

struct BmFont {
    glyphs: Map<Char, Glyph, 256>
    info: FontInfo
}