sclass RenderText is MakesBufferedImage {

  settable Color foregroundColor = Color.black;

  settable Color backgroundColor = Color.white;

  settable bool withLeading = true;

  settable Font font = sansSerifFont(20);

  settable Float fontSize; // null to keep size of font

  settable double spacing; // extra spacing per character

  settable S text = "DEMO";

  settable S alignment = "left";

  Font scaledFont;

  FontMetrics fm;

  LS lines;

  *() {}

  *(Font *font) {}

  selfType setFont(S fontSnippetID) {

    ret setFont(fontForName(fontSnippetID));

  }

  Font scaledFont() {

    Font font = this.font;

    if (spacing != 0) font = fontWithSpacing(spacing, font);

    ret scaledFont = fontSize == null ? font : font.deriveFont(fontSize);

  }

  BufferedImage get(S text) {

    text(text);

    ret this!;

  }

  public BufferedImage get aka image aka getBufferedImage() {

    fm = fontMetrics(scaledFont());

    lines = lines(text);

    var lineWidths = map(lines, line -> fm.stringWidth(line));

    int width = intMax(lineWidths);

    if (width <= 0) null;

    int lineHeight = fm.getHeight(); 

    int height = lineHeight*l(lines);

    int y = withLeading

      ? fm.getLeading() + fm.getMaxAscent()

      : fm.getAscent();

    BufferedImage img = bufferedImageWithoutAlpha(width, height, backgroundColor);

    Graphics g = imageGraphics(img);

    g.setColor(foregroundColor);

    g.setFont(scaledFont);

    for i over lines: {

      int x = 0;

      if (eq(alignment, "center"))

        x = (width-lineWidths.get(i))/2;

      g.drawString(lines.get(i), x, lineHeight*i+y);

    }

    g.dispose();

    ret img;

  }

  // can the font display all the required characters?

  bool canDisplay() {

    ret canFontDisplay(font, text);

  }

  selfType fontSize(float f) { ret fontSize((Float) f); }

  toString { ret "RenderText " + quote(shorten(text)); }

}