🛠️🐜 Antkeeper superbuild with dependencies included https://antkeeper.com
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  47. <span class="md-ellipsis">
  48. Parameter Tags
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  73. Initializing search
  74. </div>
  75. <ol class="md-search-result__list"></ol>
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  97. <li class="md-nav__item">
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  99. TOC
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  102. <li class="md-nav__item">
  103. <a href="ft2-index.html" class="md-nav__link">
  104. Index
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  109. <label class="md-nav__link" for="__nav_3">
  110. General Remarks
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  116. General Remarks
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  118. <ul class="md-nav__list" data-md-scrollfix>
  119. <li class="md-nav__item">
  120. <a href="ft2-preamble.html" class="md-nav__link">
  121. Preamble
  122. </a>
  123. </li>
  124. <li class="md-nav__item">
  125. <a href="ft2-header_inclusion.html" class="md-nav__link">
  126. FreeType's header inclusion scheme
  127. </a>
  128. </li>
  129. <li class="md-nav__item">
  130. <a href="ft2-user_allocation.html" class="md-nav__link">
  131. User allocation
  132. </a>
  133. </li>
  134. </ul>
  135. </nav>
  136. </li>
  137. <li class="md-nav__item md-nav__item--nested">
  138. <input class="md-nav__toggle md-toggle" data-md-toggle="__nav_4" type="checkbox" id="__nav_4" >
  139. <label class="md-nav__link" for="__nav_4">
  140. Core API
  141. <span class="md-nav__icon md-icon"></span>
  142. </label>
  143. <nav class="md-nav" aria-label="Core API" data-md-level="1">
  144. <label class="md-nav__title" for="__nav_4">
  145. <span class="md-nav__icon md-icon"></span>
  146. Core API
  147. </label>
  148. <ul class="md-nav__list" data-md-scrollfix>
  149. <li class="md-nav__item">
  150. <a href="ft2-version.html" class="md-nav__link">
  151. FreeType Version
  152. </a>
  153. </li>
  154. <li class="md-nav__item">
  155. <a href="ft2-basic_types.html" class="md-nav__link">
  156. Basic Data Types
  157. </a>
  158. </li>
  159. <li class="md-nav__item">
  160. <a href="ft2-base_interface.html" class="md-nav__link">
  161. Base Interface
  162. </a>
  163. </li>
  164. <li class="md-nav__item">
  165. <a href="ft2-glyph_variants.html" class="md-nav__link">
  166. Unicode Variation Sequences
  167. </a>
  168. </li>
  169. <li class="md-nav__item">
  170. <a href="ft2-color_management.html" class="md-nav__link">
  171. Glyph Color Management
  172. </a>
  173. </li>
  174. <li class="md-nav__item">
  175. <a href="ft2-layer_management.html" class="md-nav__link">
  176. Glyph Layer Management
  177. </a>
  178. </li>
  179. <li class="md-nav__item">
  180. <a href="ft2-glyph_management.html" class="md-nav__link">
  181. Glyph Management
  182. </a>
  183. </li>
  184. <li class="md-nav__item">
  185. <a href="ft2-mac_specific.html" class="md-nav__link">
  186. Mac Specific Interface
  187. </a>
  188. </li>
  189. <li class="md-nav__item">
  190. <a href="ft2-sizes_management.html" class="md-nav__link">
  191. Size Management
  192. </a>
  193. </li>
  194. <li class="md-nav__item">
  195. <a href="ft2-header_file_macros.html" class="md-nav__link">
  196. Header File Macros
  197. </a>
  198. </li>
  199. </ul>
  200. </nav>
  201. </li>
  202. <li class="md-nav__item md-nav__item--nested">
  203. <input class="md-nav__toggle md-toggle" data-md-toggle="__nav_5" type="checkbox" id="__nav_5" >
  204. <label class="md-nav__link" for="__nav_5">
  205. Format-Specific API
  206. <span class="md-nav__icon md-icon"></span>
  207. </label>
  208. <nav class="md-nav" aria-label="Format-Specific API" data-md-level="1">
  209. <label class="md-nav__title" for="__nav_5">
  210. <span class="md-nav__icon md-icon"></span>
  211. Format-Specific API
  212. </label>
  213. <ul class="md-nav__list" data-md-scrollfix>
  214. <li class="md-nav__item">
  215. <a href="ft2-multiple_masters.html" class="md-nav__link">
  216. Multiple Masters
  217. </a>
  218. </li>
  219. <li class="md-nav__item">
  220. <a href="ft2-truetype_tables.html" class="md-nav__link">
  221. TrueType Tables
  222. </a>
  223. </li>
  224. <li class="md-nav__item">
  225. <a href="ft2-type1_tables.html" class="md-nav__link">
  226. Type 1 Tables
  227. </a>
  228. </li>
  229. <li class="md-nav__item">
  230. <a href="ft2-sfnt_names.html" class="md-nav__link">
  231. SFNT Names
  232. </a>
  233. </li>
  234. <li class="md-nav__item">
  235. <a href="ft2-bdf_fonts.html" class="md-nav__link">
  236. BDF and PCF Files
  237. </a>
  238. </li>
  239. <li class="md-nav__item">
  240. <a href="ft2-cid_fonts.html" class="md-nav__link">
  241. CID Fonts
  242. </a>
  243. </li>
  244. <li class="md-nav__item">
  245. <a href="ft2-pfr_fonts.html" class="md-nav__link">
  246. PFR Fonts
  247. </a>
  248. </li>
  249. <li class="md-nav__item">
  250. <a href="ft2-winfnt_fonts.html" class="md-nav__link">
  251. Window FNT Files
  252. </a>
  253. </li>
  254. <li class="md-nav__item">
  255. <a href="ft2-font_formats.html" class="md-nav__link">
  256. Font Formats
  257. </a>
  258. </li>
  259. <li class="md-nav__item">
  260. <a href="ft2-gasp_table.html" class="md-nav__link">
  261. Gasp Table
  262. </a>
  263. </li>
  264. </ul>
  265. </nav>
  266. </li>
  267. <li class="md-nav__item md-nav__item--active md-nav__item--nested">
  268. <input class="md-nav__toggle md-toggle" data-md-toggle="__nav_6" type="checkbox" id="__nav_6" checked>
  269. <label class="md-nav__link" for="__nav_6">
  270. Controlling FreeType Modules
  271. <span class="md-nav__icon md-icon"></span>
  272. </label>
  273. <nav class="md-nav" aria-label="Controlling FreeType Modules" data-md-level="1">
  274. <label class="md-nav__title" for="__nav_6">
  275. <span class="md-nav__icon md-icon"></span>
  276. Controlling FreeType Modules
  277. </label>
  278. <ul class="md-nav__list" data-md-scrollfix>
  279. <li class="md-nav__item">
  280. <a href="ft2-auto_hinter.html" class="md-nav__link">
  281. The auto-hinter
  282. </a>
  283. </li>
  284. <li class="md-nav__item">
  285. <a href="ft2-cff_driver.html" class="md-nav__link">
  286. The CFF driver
  287. </a>
  288. </li>
  289. <li class="md-nav__item">
  290. <a href="ft2-t1_cid_driver.html" class="md-nav__link">
  291. The Type 1 and CID drivers
  292. </a>
  293. </li>
  294. <li class="md-nav__item">
  295. <a href="ft2-tt_driver.html" class="md-nav__link">
  296. The TrueType driver
  297. </a>
  298. </li>
  299. <li class="md-nav__item">
  300. <a href="ft2-pcf_driver.html" class="md-nav__link">
  301. The PCF driver
  302. </a>
  303. </li>
  304. <li class="md-nav__item">
  305. <a href="ft2-properties.html" class="md-nav__link">
  306. Driver properties
  307. </a>
  308. </li>
  309. <li class="md-nav__item md-nav__item--active">
  310. <input class="md-nav__toggle md-toggle" data-md-toggle="toc" type="checkbox" id="__toc">
  311. <label class="md-nav__link md-nav__link--active" for="__toc">
  312. Parameter Tags
  313. <span class="md-nav__icon md-icon"></span>
  314. </label>
  315. <a href="ft2-parameter_tags.html" class="md-nav__link md-nav__link--active">
  316. Parameter Tags
  317. </a>
  318. <nav class="md-nav md-nav--secondary" aria-label="Table of contents">
  319. <label class="md-nav__title" for="__toc">
  320. <span class="md-nav__icon md-icon"></span>
  321. Table of contents
  322. </label>
  323. <ul class="md-nav__list" data-md-component="toc" data-md-scrollfix>
  324. <li class="md-nav__item">
  325. <a href="#synopsis" class="md-nav__link">
  326. Synopsis
  327. </a>
  328. </li>
  329. <li class="md-nav__item">
  330. <a href="#ft_param_tag_ignore_typographic_family" class="md-nav__link">
  331. FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_FAMILY
  332. </a>
  333. </li>
  334. <li class="md-nav__item">
  335. <a href="#ft_param_tag_ignore_typographic_subfamily" class="md-nav__link">
  336. FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_SUBFAMILY
  337. </a>
  338. </li>
  339. <li class="md-nav__item">
  340. <a href="#ft_param_tag_incremental" class="md-nav__link">
  341. FT_PARAM_TAG_INCREMENTAL
  342. </a>
  343. </li>
  344. <li class="md-nav__item">
  345. <a href="#ft_param_tag_lcd_filter_weights" class="md-nav__link">
  346. FT_PARAM_TAG_LCD_FILTER_WEIGHTS
  347. </a>
  348. </li>
  349. <li class="md-nav__item">
  350. <a href="#ft_param_tag_random_seed" class="md-nav__link">
  351. FT_PARAM_TAG_RANDOM_SEED
  352. </a>
  353. </li>
  354. <li class="md-nav__item">
  355. <a href="#ft_param_tag_stem_darkening" class="md-nav__link">
  356. FT_PARAM_TAG_STEM_DARKENING
  357. </a>
  358. </li>
  359. <li class="md-nav__item">
  360. <a href="#ft_param_tag_unpatented_hinting" class="md-nav__link">
  361. FT_PARAM_TAG_UNPATENTED_HINTING
  362. </a>
  363. </li>
  364. </ul>
  365. </nav>
  366. </li>
  367. <li class="md-nav__item">
  368. <a href="ft2-lcd_rendering.html" class="md-nav__link">
  369. Subpixel Rendering
  370. </a>
  371. </li>
  372. </ul>
  373. </nav>
  374. </li>
  375. <li class="md-nav__item md-nav__item--nested">
  376. <input class="md-nav__toggle md-toggle" data-md-toggle="__nav_7" type="checkbox" id="__nav_7" >
  377. <label class="md-nav__link" for="__nav_7">
  378. Cache Sub-System
  379. <span class="md-nav__icon md-icon"></span>
  380. </label>
  381. <nav class="md-nav" aria-label="Cache Sub-System" data-md-level="1">
  382. <label class="md-nav__title" for="__nav_7">
  383. <span class="md-nav__icon md-icon"></span>
  384. Cache Sub-System
  385. </label>
  386. <ul class="md-nav__list" data-md-scrollfix>
  387. <li class="md-nav__item">
  388. <a href="ft2-cache_subsystem.html" class="md-nav__link">
  389. Cache Sub-System
  390. </a>
  391. </li>
  392. </ul>
  393. </nav>
  394. </li>
  395. <li class="md-nav__item md-nav__item--nested">
  396. <input class="md-nav__toggle md-toggle" data-md-toggle="__nav_8" type="checkbox" id="__nav_8" >
  397. <label class="md-nav__link" for="__nav_8">
  398. Support API
  399. <span class="md-nav__icon md-icon"></span>
  400. </label>
  401. <nav class="md-nav" aria-label="Support API" data-md-level="1">
  402. <label class="md-nav__title" for="__nav_8">
  403. <span class="md-nav__icon md-icon"></span>
  404. Support API
  405. </label>
  406. <ul class="md-nav__list" data-md-scrollfix>
  407. <li class="md-nav__item">
  408. <a href="ft2-computations.html" class="md-nav__link">
  409. Computations
  410. </a>
  411. </li>
  412. <li class="md-nav__item">
  413. <a href="ft2-list_processing.html" class="md-nav__link">
  414. List Processing
  415. </a>
  416. </li>
  417. <li class="md-nav__item">
  418. <a href="ft2-outline_processing.html" class="md-nav__link">
  419. Outline Processing
  420. </a>
  421. </li>
  422. <li class="md-nav__item">
  423. <a href="ft2-quick_advance.html" class="md-nav__link">
  424. Quick retrieval of advance values
  425. </a>
  426. </li>
  427. <li class="md-nav__item">
  428. <a href="ft2-bitmap_handling.html" class="md-nav__link">
  429. Bitmap Handling
  430. </a>
  431. </li>
  432. <li class="md-nav__item">
  433. <a href="ft2-raster.html" class="md-nav__link">
  434. Scanline Converter
  435. </a>
  436. </li>
  437. <li class="md-nav__item">
  438. <a href="ft2-glyph_stroker.html" class="md-nav__link">
  439. Glyph Stroker
  440. </a>
  441. </li>
  442. <li class="md-nav__item">
  443. <a href="ft2-system_interface.html" class="md-nav__link">
  444. System Interface
  445. </a>
  446. </li>
  447. <li class="md-nav__item">
  448. <a href="ft2-module_management.html" class="md-nav__link">
  449. Module Management
  450. </a>
  451. </li>
  452. <li class="md-nav__item">
  453. <a href="ft2-gzip.html" class="md-nav__link">
  454. GZIP Streams
  455. </a>
  456. </li>
  457. <li class="md-nav__item">
  458. <a href="ft2-lzw.html" class="md-nav__link">
  459. LZW Streams
  460. </a>
  461. </li>
  462. <li class="md-nav__item">
  463. <a href="ft2-bzip2.html" class="md-nav__link">
  464. BZIP2 Streams
  465. </a>
  466. </li>
  467. <li class="md-nav__item">
  468. <a href="ft2-debugging_apis.html" class="md-nav__link">
  469. External Debugging APIs
  470. </a>
  471. </li>
  472. </ul>
  473. </nav>
  474. </li>
  475. <li class="md-nav__item md-nav__item--nested">
  476. <input class="md-nav__toggle md-toggle" data-md-toggle="__nav_9" type="checkbox" id="__nav_9" >
  477. <label class="md-nav__link" for="__nav_9">
  478. Error Codes
  479. <span class="md-nav__icon md-icon"></span>
  480. </label>
  481. <nav class="md-nav" aria-label="Error Codes" data-md-level="1">
  482. <label class="md-nav__title" for="__nav_9">
  483. <span class="md-nav__icon md-icon"></span>
  484. Error Codes
  485. </label>
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  554. <li class="md-nav__item">
  555. <a href="#ft_param_tag_ignore_typographic_family" class="md-nav__link">
  556. FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_FAMILY
  557. </a>
  558. </li>
  559. <li class="md-nav__item">
  560. <a href="#ft_param_tag_ignore_typographic_subfamily" class="md-nav__link">
  561. FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_SUBFAMILY
  562. </a>
  563. </li>
  564. <li class="md-nav__item">
  565. <a href="#ft_param_tag_incremental" class="md-nav__link">
  566. FT_PARAM_TAG_INCREMENTAL
  567. </a>
  568. </li>
  569. <li class="md-nav__item">
  570. <a href="#ft_param_tag_lcd_filter_weights" class="md-nav__link">
  571. FT_PARAM_TAG_LCD_FILTER_WEIGHTS
  572. </a>
  573. </li>
  574. <li class="md-nav__item">
  575. <a href="#ft_param_tag_random_seed" class="md-nav__link">
  576. FT_PARAM_TAG_RANDOM_SEED
  577. </a>
  578. </li>
  579. <li class="md-nav__item">
  580. <a href="#ft_param_tag_stem_darkening" class="md-nav__link">
  581. FT_PARAM_TAG_STEM_DARKENING
  582. </a>
  583. </li>
  584. <li class="md-nav__item">
  585. <a href="#ft_param_tag_unpatented_hinting" class="md-nav__link">
  586. FT_PARAM_TAG_UNPATENTED_HINTING
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  595. <article class="md-content__inner md-typeset">
  596. <p><a href="https://www.freetype.org">FreeType</a> &raquo; <a href="../">Docs</a> &raquo; <a href="index.html#controlling-freetype-modules">Controlling FreeType Modules</a> &raquo; Parameter Tags</p>
  597. <hr />
  598. <h1 id="parameter-tags">Parameter Tags<a class="headerlink" href="#parameter-tags" title="Permanent link">&para;</a></h1>
  599. <h2 id="synopsis">Synopsis<a class="headerlink" href="#synopsis" title="Permanent link">&para;</a></h2>
  600. <p>This section contains macros for the <code><a href="ft2-base_interface.html#ft_parameter">FT_Parameter</a></code> structure that are used with various functions to activate some special functionality or different behaviour of various components of FreeType.</p>
  601. <h2 id="ft_param_tag_ignore_typographic_family">FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_FAMILY<a class="headerlink" href="#ft_param_tag_ignore_typographic_family" title="Permanent link">&para;</a></h2>
  602. <div class = "codehilite"><pre><code>#<span class="keyword">define</span> <b>FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_FAMILY</b> \
  603. <a href="ft2-basic_types.html#ft_make_tag">FT_MAKE_TAG</a>( 'i', 'g', 'p', 'f' )
  604. /* this constant is deprecated */
  605. #<span class="keyword">define</span> FT_PARAM_TAG_IGNORE_PREFERRED_FAMILY \
  606. <b>FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_FAMILY</b>
  607. </code></pre></div>
  608. <p>A tag for <code><a href="ft2-base_interface.html#ft_parameter">FT_Parameter</a></code> to make <code><a href="ft2-base_interface.html#ft_open_face">FT_Open_Face</a></code> ignore typographic family names in the &lsquo;name&rsquo; table (introduced in OpenType version 1.4). Use this for backward compatibility with legacy systems that have a four-faces-per-family restriction.</p>
  609. <h4>since</h4>
  610. <p>2.8</p>
  611. <hr>
  612. <h2 id="ft_param_tag_ignore_typographic_subfamily">FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_SUBFAMILY<a class="headerlink" href="#ft_param_tag_ignore_typographic_subfamily" title="Permanent link">&para;</a></h2>
  613. <div class = "codehilite"><pre><code>#<span class="keyword">define</span> <b>FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_SUBFAMILY</b> \
  614. <a href="ft2-basic_types.html#ft_make_tag">FT_MAKE_TAG</a>( 'i', 'g', 'p', 's' )
  615. /* this constant is deprecated */
  616. #<span class="keyword">define</span> FT_PARAM_TAG_IGNORE_PREFERRED_SUBFAMILY \
  617. <b>FT_PARAM_TAG_IGNORE_TYPOGRAPHIC_SUBFAMILY</b>
  618. </code></pre></div>
  619. <p>A tag for <code><a href="ft2-base_interface.html#ft_parameter">FT_Parameter</a></code> to make <code><a href="ft2-base_interface.html#ft_open_face">FT_Open_Face</a></code> ignore typographic subfamily names in the &lsquo;name&rsquo; table (introduced in OpenType version 1.4). Use this for backward compatibility with legacy systems that have a four-faces-per-family restriction.</p>
  620. <h4>since</h4>
  621. <p>2.8</p>
  622. <hr>
  623. <h2 id="ft_param_tag_incremental">FT_PARAM_TAG_INCREMENTAL<a class="headerlink" href="#ft_param_tag_incremental" title="Permanent link">&para;</a></h2>
  624. <div class = "codehilite"><pre><code>#<span class="keyword">define</span> <b>FT_PARAM_TAG_INCREMENTAL</b> \
  625. <a href="ft2-basic_types.html#ft_make_tag">FT_MAKE_TAG</a>( 'i', 'n', 'c', 'r' )
  626. </code></pre></div>
  627. <p>An <code><a href="ft2-base_interface.html#ft_parameter">FT_Parameter</a></code> tag to be used with <code><a href="ft2-base_interface.html#ft_open_face">FT_Open_Face</a></code> to indicate incremental glyph loading.</p>
  628. <hr>
  629. <h2 id="ft_param_tag_lcd_filter_weights">FT_PARAM_TAG_LCD_FILTER_WEIGHTS<a class="headerlink" href="#ft_param_tag_lcd_filter_weights" title="Permanent link">&para;</a></h2>
  630. <div class = "codehilite"><pre><code>#<span class="keyword">define</span> <b>FT_PARAM_TAG_LCD_FILTER_WEIGHTS</b> \
  631. <a href="ft2-basic_types.html#ft_make_tag">FT_MAKE_TAG</a>( 'l', 'c', 'd', 'f' )
  632. </code></pre></div>
  633. <p>An <code><a href="ft2-base_interface.html#ft_parameter">FT_Parameter</a></code> tag to be used with <code><a href="ft2-base_interface.html#ft_face_properties">FT_Face_Properties</a></code>. The corresponding argument specifies the five LCD filter weights for a given face (if using <code><a href="ft2-base_interface.html#ft_load_target_xxx">FT_LOAD_TARGET_LCD</a></code>, for example), overriding the global default values or the values set up with <code><a href="ft2-lcd_rendering.html#ft_library_setlcdfilterweights">FT_Library_SetLcdFilterWeights</a></code>.</p>
  634. <h4>since</h4>
  635. <p>2.8</p>
  636. <hr>
  637. <h2 id="ft_param_tag_random_seed">FT_PARAM_TAG_RANDOM_SEED<a class="headerlink" href="#ft_param_tag_random_seed" title="Permanent link">&para;</a></h2>
  638. <div class = "codehilite"><pre><code>#<span class="keyword">define</span> <b>FT_PARAM_TAG_RANDOM_SEED</b> \
  639. <a href="ft2-basic_types.html#ft_make_tag">FT_MAKE_TAG</a>( 's', 'e', 'e', 'd' )
  640. </code></pre></div>
  641. <p>An <code><a href="ft2-base_interface.html#ft_parameter">FT_Parameter</a></code> tag to be used with <code><a href="ft2-base_interface.html#ft_face_properties">FT_Face_Properties</a></code>. The corresponding 32bit signed integer argument overrides the font driver's random seed value with a face-specific one; see <code><a href="ft2-properties.html#random-seed">random-seed</a></code>.</p>
  642. <h4>since</h4>
  643. <p>2.8</p>
  644. <hr>
  645. <h2 id="ft_param_tag_stem_darkening">FT_PARAM_TAG_STEM_DARKENING<a class="headerlink" href="#ft_param_tag_stem_darkening" title="Permanent link">&para;</a></h2>
  646. <div class = "codehilite"><pre><code>#<span class="keyword">define</span> <b>FT_PARAM_TAG_STEM_DARKENING</b> \
  647. <a href="ft2-basic_types.html#ft_make_tag">FT_MAKE_TAG</a>( 'd', 'a', 'r', 'k' )
  648. </code></pre></div>
  649. <p>An <code><a href="ft2-base_interface.html#ft_parameter">FT_Parameter</a></code> tag to be used with <code><a href="ft2-base_interface.html#ft_face_properties">FT_Face_Properties</a></code>. The corresponding Boolean argument specifies whether to apply stem darkening, overriding the global default values or the values set up with <code><a href="ft2-module_management.html#ft_property_set">FT_Property_Set</a></code> (see <code><a href="ft2-properties.html#no-stem-darkening">no-stem-darkening</a></code>).</p>
  650. <p>This is a passive setting that only takes effect if the font driver or autohinter honors it, which the CFF, Type&nbsp;1, and CID drivers always do, but the autohinter only in &lsquo;light&rsquo; hinting mode (as of version 2.9).</p>
  651. <h4>since</h4>
  652. <p>2.8</p>
  653. <hr>
  654. <h2 id="ft_param_tag_unpatented_hinting">FT_PARAM_TAG_UNPATENTED_HINTING<a class="headerlink" href="#ft_param_tag_unpatented_hinting" title="Permanent link">&para;</a></h2>
  655. <div class = "codehilite"><pre><code>#<span class="keyword">define</span> <b>FT_PARAM_TAG_UNPATENTED_HINTING</b> \
  656. <a href="ft2-basic_types.html#ft_make_tag">FT_MAKE_TAG</a>( 'u', 'n', 'p', 'a' )
  657. </code></pre></div>
  658. <p>Deprecated, no effect.</p>
  659. <p>Previously: A constant used as the tag of an <code><a href="ft2-base_interface.html#ft_parameter">FT_Parameter</a></code> structure to indicate that unpatented methods only should be used by the TrueType bytecode interpreter for a typeface opened by <code><a href="ft2-base_interface.html#ft_open_face">FT_Open_Face</a></code>.</p>
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