/**
* set the kerning values associated to a pair of character
* @param mixed $ch1 the preceeding character
* @param mixed $ch2 the following character
* @params numeric $kern the kerning value
*/
public function setKerningByPair($ch1, $ch2, $kern)
{
if ($this->direction == -1) {
foreach ($this->directions as $direction) {
$this->font_metrics[$direction]->setKerningByPair($ch1, $ch2, $kern);
}
parent::setKerningByPair($ch1, $ch2, $kern);
} else {
$this->font_metrics[$this->direction]->setKerningByPair($ch1, $ch2, $kern);
}
}
