code: public Chunk setTextRenderMode(int mode, float strokeWidth,
  			Color strokeColor) {
  		return setAttribute(TEXTRENDERMODE, new Object[] { Integer.valueOf(mode),
  				new Float(strokeWidth), strokeColor });
  	}
docs: Sets the text rendering mode. It can outline text, simulate bold and make
  text invisible.
  
  @param mode
  the text rendering mode. It can be <CODE>
  PdfContentByte.TEXT_RENDER_MODE_FILL</CODE>,<CODE>
  PdfContentByte.TEXT_RENDER_MODE_STROKE</CODE>,<CODE>
  PdfContentByte.TEXT_RENDER_MODE_FILL_STROKE</CODE> and <CODE>
  PdfContentByte.TEXT_RENDER_MODE_INVISIBLE</CODE>.
  @param strokeWidth
  the stroke line width for the modes <CODE>
  PdfContentByte.TEXT_RENDER_MODE_STROKE</CODE> and <CODE>
  PdfContentByte.TEXT_RENDER_MODE_FILL_STROKE</CODE>.
  @param strokeColor
  the stroke color or <CODE>null</CODE> to follow the text
  color
  @return this <CODE>Chunk</CODE>