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1<?php
2declare(strict_types=1);
3/**
4 * Pop PHP Framework (https://www.popphp.org/)
5 *
6 * @link       https://github.com/popphp/popphp-framework
7 * @author     Nick Sagona, III <nick@popphp.org>
8 * @copyright  Copyright (c) 2009-2026 Nick Sagona, III
9 * @license    https://www.popphp.org/license     New BSD License
10 */
11
12/**
13 * @namespace
14 */
15namespace Pop\Pdf\Build\Font\TrueType\Table;
16
17/**
18 * HMTX table class
19 *
20 * @category   Pop
21 * @package    Pop\Pdf
22 * @author     Nick Sagona, III <nick@popphp.org>
23 * @copyright  Copyright (c) 2009-2026 Nick Sagona, III
24 * @license    https://www.popphp.org/license     New BSD License
25 * @version    6.0.0
26 */
27class Hmtx extends AbstractTable
28{
29
30    /**
31     * Font table properties
32     * @var array
33     */
34    protected array $properties = [
35        'glyphWidths' => []
36    ];
37
38    /**
39     * Constructor
40     *
41     * Instantiate a TTF 'hmtx' table object.
42     *
43     * @param  \Pop\Pdf\Build\Font\TrueType $font
44     */
45    public function __construct(\Pop\Pdf\Build\Font\TrueType $font)
46    {
47        $bytePos = $font->tableInfo['hmtx']->offset;
48
49        $count      = $font->numberOfHMetrics;
50        $totalBytes = $count * 4;
51        $values     = array_values(unpack('n*', $font->read($bytePos, $totalBytes)));
52
53        for ($i = 0; $i < $count; $i++) {
54            $this->properties['glyphWidths'][$i] = $font->shiftToSigned($values[$i * 2]);
55        }
56
57        while (count($this->properties['glyphWidths']) < $font->numberOfGlyphs) {
58            $this->properties['glyphWidths'][] = end($this->properties['glyphWidths']);
59        }
60    }
61
62}