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1 | <?php |
2 | /** |
3 | * Pop PHP Framework (http://www.popphp.org/) |
4 | * |
5 | * @link https://github.com/popphp/popphp-framework |
6 | * @author Nick Sagona, III <dev@nolainteractive.com> |
7 | * @copyright Copyright (c) 2009-2023 NOLA Interactive, LLC. (http://www.nolainteractive.com) |
8 | * @license http://www.popphp.org/license New BSD License |
9 | */ |
10 | |
11 | /** |
12 | * @namespace |
13 | */ |
14 | namespace Pop\Pdf\Build\Font; |
15 | |
16 | use Pop\Utils\ArrayObject as Data; |
17 | |
18 | /** |
19 | * TrueType font class |
20 | * |
21 | * @category Pop |
22 | * @package Pop\Pdf |
23 | * @author Nick Sagona, III <dev@nolainteractive.com> |
24 | * @copyright Copyright (c) 2009-2023 NOLA Interactive, LLC. (http://www.nolainteractive.com) |
25 | * @license http://www.popphp.org/license New BSD License |
26 | * @version 4.2.0 |
27 | */ |
28 | class TrueType extends AbstractFont |
29 | { |
30 | |
31 | /** |
32 | * Font properties |
33 | * @var array |
34 | */ |
35 | protected $properties = [ |
36 | 'info' => null, |
37 | 'bBox' => null, |
38 | 'ascent' => 0, |
39 | 'descent' => 0, |
40 | 'numberOfGlyphs' => 0, |
41 | 'glyphWidths' => [], |
42 | 'rawGlyphWidths' => [], |
43 | 'cmap' => ['glyphIndexArray' => [], 'glyphNumbers' => []], |
44 | 'missingWidth' => 0, |
45 | 'numberOfHMetrics' => 0, |
46 | 'italicAngle' => 0, |
47 | 'capHeight' => 0, |
48 | 'stemH' => 0, |
49 | 'stemV' => 0, |
50 | 'unitsPerEm' => 1000, |
51 | 'flags' => null, |
52 | 'embeddable' => true, |
53 | 'header' => null, |
54 | 'ttfHeader' => null, |
55 | 'ttfTable' => null, |
56 | 'tables' => [], |
57 | 'tableInfo' => [] |
58 | ]; |
59 | |
60 | /** |
61 | * Constructor |
62 | * |
63 | * Instantiate a TrueType font file object based on a pre-existing font file on disk. |
64 | * |
65 | * @param string $fontFile |
66 | * @param string $fontStream |
67 | */ |
68 | public function __construct($fontFile = null, $fontStream = null) |
69 | { |
70 | parent::__construct($fontFile, $fontStream); |
71 | |
72 | $this->parseTtfTable(); |
73 | $this->parseName(); |
74 | $this->parseCommonTables(); |
75 | $this->parseRequiredTables(); |
76 | } |
77 | |
78 | /** |
79 | * Method to parse the TTF header and table of the TrueType font file. |
80 | * |
81 | * @return void |
82 | */ |
83 | protected function parseTtfTable() |
84 | { |
85 | $ttfHeader = unpack( |
86 | 'nmajorVersion/' . |
87 | 'nminorVersion/' . |
88 | 'nnumberOfTables/' . |
89 | 'nsearchRange/' . |
90 | 'nentrySelector/' . |
91 | 'nrangeShift', $this->read(0, 12) |
92 | ); |
93 | |
94 | $tableName = $this->read(12, 4); |
95 | |
96 | $ttfTable = unpack( |
97 | 'Nchecksum/' . |
98 | 'Noffset/' . |
99 | 'Nlength', $this->read(16, 12) |
100 | ); |
101 | |
102 | $ttfTable['name'] = $tableName; |
103 | |
104 | $this->properties['ttfHeader'] = new Data($ttfHeader); |
105 | $this->properties['ttfTable'] = new Data($ttfTable); |
106 | |
107 | $nameByteOffset = 28; |
108 | $tableByteOffset = 32; |
109 | |
110 | for ($i = 0; $i < $this->properties['ttfHeader']['numberOfTables']; $i++) { |
111 | $ttfTableName = $this->read($nameByteOffset, 4); |
112 | $ttfTable = unpack( |
113 | 'Nchecksum/' . |
114 | 'Noffset/' . |
115 | 'Nlength', $this->read($tableByteOffset, 12) |
116 | ); |
117 | |
118 | $this->properties['tableInfo'][trim($ttfTableName)] = new Data($ttfTable); |
119 | |
120 | $nameByteOffset = $tableByteOffset + 12; |
121 | $tableByteOffset = $nameByteOffset + 4; |
122 | } |
123 | } |
124 | |
125 | /** |
126 | * Method to parse the TTF info of the TrueType font file from the name table. |
127 | * |
128 | * @return void |
129 | */ |
130 | protected function parseName() |
131 | { |
132 | if (isset($this->properties['tableInfo']['name'])) { |
133 | $this->properties['tables']['name'] = new TrueType\Table\Name($this); |
134 | $this->properties['info'] = $this->properties['tables']['name']; |
135 | if ((stripos($this->properties['tables']['name']['fontFamily'], 'bold') !== false) || |
136 | (stripos($this->properties['tables']['name']['fullName'], 'bold') !== false) || |
137 | (stripos($this->properties['tables']['name']['postscriptName'], 'bold') !== false)) { |
138 | $this->properties['stemV'] = 120; |
139 | } else { |
140 | $this->properties['stemV'] = 70; |
141 | } |
142 | } |
143 | } |
144 | |
145 | /** |
146 | * Method to parse the common tables of the TrueType font file. |
147 | * |
148 | * @return void |
149 | */ |
150 | protected function parseCommonTables() |
151 | { |
152 | // head |
153 | if (isset($this->properties['tableInfo']['head'])) { |
154 | $this->properties['tables']['head'] = new TrueType\Table\Head($this); |
155 | |
156 | $this->properties['unitsPerEm'] = $this->properties['tables']['head']['unitsPerEm']; |
157 | |
158 | $this->properties['tables']['head']['xMin'] = $this->toEmSpace($this->properties['tables']['head']['xMin']); |
159 | $this->properties['tables']['head']['yMin'] = $this->toEmSpace($this->properties['tables']['head']['yMin']); |
160 | $this->properties['tables']['head']['xMax'] = $this->toEmSpace($this->properties['tables']['head']['xMax']); |
161 | $this->properties['tables']['head']['yMax'] = $this->toEmSpace($this->properties['tables']['head']['yMax']); |
162 | |
163 | $this->properties['bBox'] = new Data([ |
164 | 'xMin' => $this->properties['tables']['head']['xMin'], |
165 | 'yMin' => $this->properties['tables']['head']['yMin'], |
166 | 'xMax' => $this->properties['tables']['head']['xMax'], |
167 | 'yMax' => $this->properties['tables']['head']['yMax'] |
168 | ]); |
169 | |
170 | $this->properties['header'] = $this->properties['tables']['head']; |
171 | } |
172 | |
173 | // hhea |
174 | if (isset($this->properties['tableInfo']['hhea'])) { |
175 | $this->properties['tables']['hhea'] = new TrueType\Table\Hhea($this); |
176 | $this->properties['ascent'] = $this->properties['tables']['hhea']['ascent']; |
177 | $this->properties['descent'] = $this->properties['tables']['hhea']['descent']; |
178 | $this->properties['capHeight'] = $this->properties['ascent'] + $this->properties['descent']; |
179 | $this->properties['numberOfHMetrics'] = $this->properties['tables']['hhea']['numberOfHMetrics']; |
180 | } |
181 | |
182 | // maxp |
183 | if (isset($this->properties['tableInfo']['maxp'])) { |
184 | $this->properties['tables']['maxp'] = new TrueType\Table\Maxp($this); |
185 | $this->properties['numberOfGlyphs'] = $this->properties['tables']['maxp']['numberOfGlyphs']; |
186 | } |
187 | |
188 | // post |
189 | if (isset($this->properties['tableInfo']['post'])) { |
190 | $this->properties['tables']['post'] = new TrueType\Table\Post($this); |
191 | |
192 | if ($this->properties['tables']['post']['italicAngle'] != 0) { |
193 | $this->properties['flags']['isItalic'] = true; |
194 | $this->properties['italicAngle'] = $this->properties['tables']['post']['italicAngle']; |
195 | } |
196 | |
197 | if ($this->properties['tables']['post']['fixed'] != 0) { |
198 | $this->properties['flags']['isFixedPitch'] = true; |
199 | } |
200 | } |
201 | |
202 | // hmtx |
203 | if (isset($this->properties['tableInfo']['hmtx'])) { |
204 | $this->properties['tables']['hmtx'] = new TrueType\Table\Hmtx($this); |
205 | $this->properties['glyphWidths'] = $this->properties['tables']['hmtx']['glyphWidths']; |
206 | if (isset($this->properties['glyphWidths'][0])) { |
207 | $this->properties['missingWidth'] = round((1000 / $this->properties['unitsPerEm']) * $this->properties['glyphWidths'][0]); |
208 | } |
209 | |
210 | foreach ($this->properties['glyphWidths'] as $key => $value) { |
211 | $this->properties['rawGlyphWidths'][$key] = $value; |
212 | $this->properties['glyphWidths'][$key] = round((1000 / $this->properties['unitsPerEm']) * $value); |
213 | } |
214 | } |
215 | |
216 | // cmap |
217 | if (isset($this->properties['tableInfo']['cmap'])) { |
218 | $this->properties['tables']['cmap'] = new TrueType\Table\Cmap($this); |
219 | if (isset($this->properties['tables']['cmap']['subTables']) && isset($this->properties['tables']['cmap']['subTables'][0]) && |
220 | isset($this->properties['tables']['cmap']['subTables'][0]['parsed'])) { |
221 | if (isset($this->properties['tables']['cmap']['subTables'][0]['parsed']['glyphIndexArray'])) { |
222 | $this->properties['cmap']['glyphIndexArray'] = $this->properties['tables']['cmap']['subTables'][0]['parsed']['glyphIndexArray']; |
223 | } |
224 | if (isset($this->properties['tables']['cmap']['subTables'][0]['parsed']['glyphNumbers'])) { |
225 | $this->properties['cmap']['glyphNumbers'] = $this->properties['tables']['cmap']['subTables'][0]['parsed']['glyphNumbers']; |
226 | } |
227 | } |
228 | } |
229 | } |
230 | |
231 | /** |
232 | * Method to parse the required tables of the TrueType font file. |
233 | * |
234 | * @return void |
235 | */ |
236 | protected function parseRequiredTables() |
237 | { |
238 | // loca |
239 | if (isset($this->properties['tableInfo']['loca'])) { |
240 | $this->properties['tables']['loca'] = new TrueType\Table\Loca($this); |
241 | } |
242 | |
243 | // glyf |
244 | if (isset($this->properties['tableInfo']['glyf'])) { |
245 | $this->properties['tables']['glyf'] = new TrueType\Table\Glyf($this); |
246 | } |
247 | |
248 | // OS/2 (Optional in a TTF font file) |
249 | if (isset($this->properties['tableInfo']['OS/2'])) { |
250 | $this->properties['tables']['OS/2'] = new TrueType\Table\Os2($this); |
251 | $this->properties['flags']['isSerif'] = $this->properties['tables']['OS/2']['flags']['isSerif']; |
252 | $this->properties['flags']['isScript'] = $this->properties['tables']['OS/2']['flags']['isScript']; |
253 | $this->properties['flags']['isSymbolic'] = $this->properties['tables']['OS/2']['flags']['isSymbolic']; |
254 | $this->properties['flags']['isNonSymbolic'] = $this->properties['tables']['OS/2']['flags']['isNonSymbolic']; |
255 | $this->properties['embeddable'] = $this->properties['tables']['OS/2']['embeddable']; |
256 | } |
257 | } |
258 | |
259 | } |