src/Html2Pdf.php
public function addFont($family, $style = '', $file = '')
    {
        $this->pdf->AddFont($family, $style, $file);

        return $this;
    }
public function addFont($family, $style = '', $file = '')
    {
        $this->pdf->AddFont($family, $style, $file);

        return $this;
    }
public function addFont ( $ family , $ style = '' , $ file = '' ) { $ this -> pdf -> AddFont ( $ family , $ style , $ file ) ; return $ this ; }
add a font, see TCPDF function addFont

@access public
@param string $family Font family. The name can be chosen arbitrarily. If it is a standard family name, it will override the corresponding font.
@param string $style Font style. Possible values are (case insensitive):<ul><li>empty string: regular (default)</li><li>B: bold</li><li>I: italic</li><li>BI or IB: bold italic</li></ul>
@param string $file The font definition file. By default, the name is built from the family and style, in lower case with no spaces.
@return Html2Pdf $this
@see TCPDF::addFont
add a font see TCPDF function addFont