/**
* Return the (horizontal) kerning values for a pair of characters
* @params string $ch1 the left characcter
* @params string $ch2 the right character
* @param bool use_font_size default false --
* @returns float the kerning value or null if none is found
*/
public function getKerningValue($ch1, $ch2, $use_font_size = false)
{
if ($this->direction != -1) {
return $this->font_metrics[$this->direction]->getKerningValue($ch1, $ch2, $use_font_size);
} else {
return parent::getKerningValue($ch1, $ch2, $use_font_size);
}
}
