public void pushStyle() {
    if (styleStackDepth == styleStack.length) {
      styleStack = (PStyle[]) PApplet.expand(styleStack);
    }
    if (styleStack[styleStackDepth] == null) {
      styleStack[styleStackDepth] = new PStyle();
    }
    PStyle s = styleStack[styleStackDepth++];
    getStyle(s);
  }