/**
* set the kerning values associated to a pair of groups
* @param mixed $g1 the preceeding group
* @param mixed $g2 the following group
* @params numeric $kern the kerning value
*/
public function setKerningByGroup($g1, $g2, $kern)
{
if ($this->direction == -1) {
foreach ($this->directions as $direction) {
$this->font_metrics[$direction]->setKerningByGroup($g1, $g2, $kern);
}
parent::setKerningByGroup($g1, $g2, $kern);
} else {
$this->font_metrics[$this->direction]->setKerningByGroup($g1, $g2, $kern);
}
}
