code: function FontLayout(context, options) {
  
          // Prepare
          size = context.size;
          direction = context.direction;
          text = options.text || 'KLMNOPQRSTUVW';
          spacing = (options.spacing === undefined) ? 10 : options.spacing;
          offset = 0;
          set.size[0] = options.segmentSize ? options.segmentSize[0] : 20;
          set.size[1] = options.segmentSize ? options.segmentSize[1] : 4;
  
          for (var i = 0; i < text.length; i++) {
              var charSegments = charMap[text.charAt(i)] || charMap['?'];
              for (var j = 0; j < 8; j++) {
                  if (charSegments & (1 << j)) {
                      node = context.next();
                      if (!node) {
                          return;
                      }
                      var segment = segmentMap[j];
                      set.translate[0] = (set.size[0] * segment[0]) + (segment[3] * set.size[1]);
                      set.translate[1] = (set.size[0] * segment[1]) + (segment[4] * set.size[1]);
                      set.translate[direction] += offset;
                      set.rotate[2] = (segment[2] * Math.PI * 2);
                      set.scrollLength = i ? 0 : (direction ? (set.size[0] * 2) : set.size[1]);
                      if ((j === 0) && (i < (text.length - 1))) {
                          set.scrollLength += spacing;
                      }
                      context.set(node, set);
                  }
              }
  
              // Advance offset for next character
              offset += (direction ? (set.size[0] * 2) : set.size[0]) + spacing;
          }
      }
docs: Font-layout