73 lines
1.7 KiB
PHP
73 lines
1.7 KiB
PHP
<?php
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/**
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* @package php-font-lib
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* @link https://github.com/PhenX/php-font-lib
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* @author Fabien Ménager <fabien.menager@gmail.com>
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* @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
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*/
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/**
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* `loca` font table.
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*
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* @package php-font-lib
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*/
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class Font_Table_loca extends Font_Table {
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protected function _parse(){
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$font = $this->getFont();
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$offset = $font->pos();
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$indexToLocFormat = $font->getData("head", "indexToLocFormat");
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$numGlyphs = $font->getData("maxp", "numGlyphs");
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$font->seek($offset);
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$data = array();
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// 2 bytes
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if ($indexToLocFormat == 0) {
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$d = $font->read(($numGlyphs + 1) * 2);
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$loc = unpack("n*", $d);
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for ($i = 0; $i <= $numGlyphs; $i++) {
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$data[] = $loc[$i+1] * 2;
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}
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}
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// 4 bytes
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else if ($indexToLocFormat == 1) {
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$d = $font->read(($numGlyphs + 1) * 4);
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$loc = unpack("N*", $d);
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for ($i = 0; $i <= $numGlyphs; $i++) {
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$data[] = $loc[$i+1];
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}
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}
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$this->data = $data;
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}
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function _encode(){
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$font = $this->getFont();
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$data = $this->data;
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$indexToLocFormat = $font->getData("head", "indexToLocFormat");
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$numGlyphs = $font->getData("maxp", "numGlyphs");
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$length = 0;
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// 2 bytes
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if ($indexToLocFormat == 0) {
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for ($i = 0; $i <= $numGlyphs; $i++) {
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$length += $font->writeUInt16($data[$i] / 2);
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}
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}
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// 4 bytes
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else if ($indexToLocFormat == 1) {
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for ($i = 0; $i <= $numGlyphs; $i++) {
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$length += $font->writeUInt32($data[$i]);
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}
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}
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return $length;
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}
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} |