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1<?php
2/**
3 * Pop PHP Framework (https://www.popphp.org/)
4 *
5 * @link       https://github.com/popphp/popphp-framework
6 * @author     Nick Sagona, III <dev@noladev.com>
7 * @copyright  Copyright (c) 2009-2026 NOLA Interactive, LLC.
8 * @license    https://www.popphp.org/license     New BSD License
9 */
10
11/**
12 * @namespace
13 */
14namespace Pop\Pdf\Build\Font\TrueType\Table;
15
16/**
17 * GLYF table class
18 *
19 * @category   Pop
20 * @package    Pop\Pdf
21 * @author     Nick Sagona, III <dev@noladev.com>
22 * @copyright  Copyright (c) 2009-2026 NOLA Interactive, LLC.
23 * @license    https://www.popphp.org/license     New BSD License
24 * @version    5.2.7
25 */
26class Glyf extends AbstractTable
27{
28
29    /**
30     * Font table properties
31     * @var array
32     */
33    protected array $properties = [
34        'glyphs'      => [],
35        'glyphWidths' => []
36    ];
37
38    /**
39     * Constructor
40     *
41     * Instantiate a TTF 'glyf' table object.
42     *
43     * @param  \Pop\Pdf\Build\Font\TrueType $font
44     */
45    public function __construct(\Pop\Pdf\Build\Font\TrueType $font)
46    {
47        $locaLength = count($font->tables['loca']->offsets);
48        $j = 0;
49
50        foreach ($font->tables['loca']->offsets as $offset) {
51            $bytePos = $font->tableInfo['glyf']->offset + $offset;
52            $ary = unpack(
53                'nnumberOfContours/' .
54                'nxMin/' .
55                'nyMin/' .
56                'nxMax/' .
57                'nyMax', $font->read($bytePos, 10)
58            );
59            $ary = $font->shiftToSigned($ary);
60            $ary['xMin']  = $font->toEmSpace($ary['xMin']);
61            $ary['yMin']  = $font->toEmSpace($ary['yMin']);
62            $ary['xMax']  = $font->toEmSpace($ary['xMax']);
63            $ary['yMax']  = $font->toEmSpace($ary['yMax']);
64            $ary['width'] = $ary['xMin'] + $ary['xMax'];
65            $this->properties['glyphWidths'][] = $ary['width'];
66
67            $bytePos += 10;
68            $ary['endPtsOfContours'] = [];
69            $ary['instructionLength'] = null;
70            $ary['instructions'] = null;
71            $ary['flags'] = null;
72
73            // The simple and composite glyph descriptions may not be necessary.
74            // If simple glyph.
75            if ($ary['numberOfContours'] > 0) {
76                for ($i = 0; $i < $ary['numberOfContours']; $i++) {
77                    $ar = unpack('nendPt', $font->read($bytePos, 2));
78                    $ary['endPtsOfContours'][$i] = $ar['endPt'];
79                    $bytePos += 2;
80                }
81                $ar = unpack('ninstructionLength', $font->read($bytePos, 2));
82                $ary['instructionLength'] = $ar['instructionLength'];
83                $bytePos += 2;
84                if ($ary['instructionLength'] > 0) {
85                    for ($i = 0; $i < $ary['instructionLength']; $i++) {
86                        $byte = $font->read($bytePos, 1);
87                        if (strlen($byte) != 0) {
88                            $ar = unpack('Cinstruction', $byte);
89                            $ary['instructions'][$i] = $ar['instruction'];
90                            $bytePos++;
91                        } else {
92                            $ary['instructions'][$i] = null;
93                        }
94                    }
95                }
96                $bytePos++;
97                $byte = $font->read($bytePos, 1);
98                if (strlen($byte) != 0) {
99                    $ar = unpack('Cflags', $byte);
100                    $ary['flags'] = $ar['flags'];
101                } else {
102                    $ary['flags'] = 0;
103                }
104                if ($j < ($locaLength - 1)) {
105                    $this->properties['glyphs'][] = $ary;
106                }
107            // Stopped here. Still need to get the x & y coordinates of the simple glyph.
108            // Else, if composite glyph.
109            } else {
110                if ($j < ($locaLength - 1)) {
111                    // Composite glyph goes here.
112                }
113            }
114            $j++;
115        }
116    }
117
118}