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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
*/
/**
* `kern` font table.
*
* @package php-font-lib
*/
class Font_Table_kern extends Font_Table {
protected function _parse(){
$font = $this->getFont();
$data = $font->unpack(array(
"version" => self::uint16,
"nTables" => self::uint16,
// only the first subtable will be parsed
"subtableVersion" => self::uint16,
"length" => self::uint16,
"coverage" => self::uint16,
));
$data["format"] = ($data["coverage"] >> 8);
$subtable = array();
switch($data["format"]) {
case 0:
$subtable = $font->unpack(array(
"nPairs" => self::uint16,
"searchRange" => self::uint16,
"entrySelector" => self::uint16,
"rangeShift" => self::uint16,
));
$pairs = array();
$tree = array();
for ($i = 0; $i < $subtable["nPairs"]; $i++) {
$left = $font->readUInt16();
$right = $font->readUInt16();
$value = $font->readInt16();
$pairs[] = array(
"left" => $left,
"right" => $right,
"value" => $value,
);
$tree[$left][$right] = $value;
}
//$subtable["pairs"] = $pairs;
$subtable["tree"] = $tree;
break;
case 1:
case 2:
case 3:
break;
}
$data["subtable"] = $subtable;
$this->data = $data;
}
}
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