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<?php
/**
* @package php-font-lib
* @link https://github.com/PhenX/php-font-lib
* @author Fabien Ménager <fabien.menager@gmail.com>
* @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
*/
/**
* `hmtx` font table.
*
* @package php-font-lib
*/
class Font_Table_hmtx extends Font_Table {
protected function _parse(){
$font = $this->getFont();
$offset = $font->pos();
$numOfLongHorMetrics = $font->getData("hhea", "numOfLongHorMetrics");
$numGlyphs = $font->getData("maxp", "numGlyphs");
$font->seek($offset);
$data = array();
for($gid = 0; $gid < $numOfLongHorMetrics; $gid++) {
$advanceWidth = $font->readUInt16();
$leftSideBearing = $font->readUInt16();
$data[$gid] = array($advanceWidth, $leftSideBearing);
}
if($numOfLongHorMetrics < $numGlyphs){
$lastWidth = end($data);
$data = array_pad($data, $numGlyphs, $lastWidth);
}
$this->data = $data;
}
protected function _encode() {
$font = $this->getFont();
$subset = $font->getSubset();
$data = $this->data;
$length = 0;
foreach($subset as $gid) {
$length += $font->writeUInt16($data[$gid][0]);
$length += $font->writeUInt16($data[$gid][1]);
}
return $length;
}
}
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