sclass RenderText {
  settable Color fg = Color.black;
  settable Color bg = Color.white;
  settable bool withLeading = true;
  settable Font font = sansSerifFont(20);
  settable float fontSize = 20;
  settable S text;
  
  FontMetrics fm;
  
  selfType setFont(S fontSnippetID) {
    ret setFont(loadFont_cached(fontSnippetID));
  }
  
  Font scaledFont() { ret font.deriveFont(fontSize); }
  
  BufferedImage get(S text) {
    text(text);
    ret this!;
  }

  BufferedImage get() {
    fm = fontMetrics(font);
    int width = fm.stringWidth(text);
    if (width <= 0) null;
    int height = fm.getHeight();
    int y = withLeading
      ? fm.getLeading() + fm.getMaxAscent()
      : fm.getAscent();
  
    BufferedImage img = bufferedImageWithoutAlpha(width, height, bg);
    
    Graphics g = imageGraphics(img);
    g.setColor(foreground);
    g.setFont(scaledFont());
    g.drawString(text, 0, y);
    g.dispose();
  
    ret img;
  }
}