anchor.diff:  BitmapFont readFont(String font, Image map) => BitmapFont.fromFnt(font, map);
   
   /// A bitmap font that can be used with [drawString] and [drawChar] functions.
  -/// You can generate a font files from a program
  -/// like: http://kvazars.com/littera
  +/// If you want use own fonts following with this steps:
  +///     1. Get your .ttf file - important is to select file with specific style which you want
  +///         for example when you download .ttf file from google fonts: select file from /static folder
  +///         example name: Roboto-Black.ttf
  +///     2. Convert ttf file to fnt zip with page: https://ttf2fnt.com/
  +///     3. Create dart file with code:
  +///       void main() {
  +///         String fileName = 'YourFontName-Style.zip';
  +///         // your file has to be in the same folder as this program
  +///         File file = File('$fileName');
  +///         List<int> bytes = file.readAsBytesSync();
  +///         print(bytes);
  +///       }
  +///     4. Change fileName in code above to your file name
  +///     5. Run this program
  +///     6. Copy results
  +///     7. Create dart file in your project with code:
  +///       final BitmapFont fontNameSizeStyle = BitmapFont.fromZip(_FONTNAME_SIZE_STYLE);
  +///       const List<int> _FONTNAME_SIZE_STYLE = <PASTE_HERE>
   class BitmapFont {
     String face = '';
     int size = 0;
  
positive.code: 
      /// Remove leading whitespace so xml detection is correct
      final font_str =
          String.fromCharCodes(font_file.content as List<int>).trimLeft();
      XmlDocument xml;
  
      /// Added <?xml which may be present, appropriately
  
negative.code:           final fontImage = fontPages[page];
  
            final ch = BitmapFontCharacter(
                id,
                width,
                height,
                xoffset,
                yoffset,
                xadvance,
                page,
                chnl);
  
            characters[id] = ch;
  
  