{"id":74805,"date":"2020-03-20T20:42:28","date_gmt":"2020-03-20T17:42:28","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/ttf-parser-0-5-novaya-biblioteka-dlya-raboty-s-truetype-shriftami"},"modified":"2020-03-20T20:42:28","modified_gmt":"2020-03-20T17:42:28","slug":"ttf-parser-0-5-novaya-biblioteka-dlya-raboty-s-truetype-shriftami","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/ttf-parser-0-5-novaya-biblioteka-dlya-raboty-s-truetype-shriftami","title":{"rendered":"ttf-parser 0.5 \u2014 nov\u00e1 knihovna pro pr\u00e1ci s TrueType p\u00edsmem","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

<\/p>\n

ttf-parser<\/a> — je knihovna pro anal\u00fdzu TrueType\/OpenType font\u016f.<\/noindex>
\nNov\u00e1 verze p\u0159in\u00e1\u0161\u00ed plnou podporu prom\u011bnn\u00fdch font\u016f.
\n(prom\u011bnn\u00e9 fonty<\/a>) a C API, proto jsem se rozhodl ji propagovat na f\u00f3ru.<\/p>\n

Do ned\u00e1vna existovaly pouze dv\u011b mo\u017enosti pro pr\u00e1ci s fonty TrueType: FreeType a stb_truetype. Prvn\u00ed je obrovsk\u00fd n\u00e1stroj, druh\u00fd podporuje pom\u011brn\u011b m\u00e1lo funkc\u00ed.<\/p>\n

ttf-parser se nach\u00e1z\u00ed n\u011bkde uprost\u0159ed. Podporuje v\u0161echny stejn\u00e9 tabulky TrueType (form\u00e1t TrueType se skl\u00e1d\u00e1 z mnoha jednotliv\u00fdch bin\u00e1rn\u00edch tabulek) jako FreeType, ale nezab\u00fdv\u00e1 se samotn\u00fdm vykreslov\u00e1n\u00edm glyph\u016f.<\/p>\n

P\u0159itom ttf-parser obsahuje mno\u017estv\u00ed dal\u0161\u00edch v\u00fdznamn\u00fdch rozd\u00edl\u016f:<\/p>\n

    \n
  1. ttf-parser je naps\u00e1n v Rust bez pou\u017eit\u00ed unsafe. FreeType a stb_truetype jsou naps\u00e1ny v C.<\/li>\n
  2. ttf-parser je jedin\u00e1 bezpe\u010dn\u00e1 (memory-safe) implementace. \u010cten\u00ed libovoln\u00e9 pam\u011bti nen\u00ed mo\u017en\u00e9. Ve FreeType se neust\u00e1le opravuj\u00ed zranitelnosti, zat\u00edmco stb_truetype nen\u00ed ur\u010den pro \u010dten\u00ed libovoln\u00fdch font\u016f.<\/li>\n
  3. ttf-parser je jedine\u010dn\u00e1 thread-safe implementace. V\u0161echny metody anal\u00fdzy jsou konstantn\u00ed. Jedinou v\u00fdjimkou je nastaven\u00ed sou\u0159adnic pro prom\u011bnn\u00e9 fonty, ale tato funkce je reentrantn\u00ed. FreeType je v z\u00e1sad\u011b jednovl\u00e1knov\u00fd. stb_truetype — je reentrantn\u00ed (m\u016f\u017eete pou\u017e\u00edvat samostatn\u00e9 kopie v r\u016fzn\u00fdch vl\u00e1knech, ale ne jednu z mnoha).<\/li>\n
  4. ttf-parser je jedine\u010dn\u00e1 implementace, kter\u00e1 nepou\u017e\u00edv\u00e1 alokaci v «hald\u011b». To zrychluje anal\u00fdzu a vyh\u00fdb\u00e1 se probl\u00e9m\u016fm p\u0159i OOM.<\/li>\n
  5. T\u00e9m\u011b\u0159 v\u0161echny aritmetick\u00e9 operace a p\u0159etypov\u00e1n\u00ed \u010d\u00edseln\u00fdch typ\u016f jsou kontrolov\u00e1ny (v\u010detn\u011b statick\u00e9 kontroly).<\/li>\n
  6. V nejhor\u0161\u00edm p\u0159\u00edpad\u011b knihovna m\u016f\u017ee vyvolat v\u00fdjimku. V C API budou v\u00fdjimky zachyceny a funkce vr\u00e1t\u00ed chybu, ale nespadne.<\/li>\n<\/ol>\n

    <\/p>\n

    A navzdory v\u0161em z\u00e1ruk\u00e1m bezpe\u010dnosti je ttf-parser tak\u00e9 nejrychlej\u0161\u00ed implementac\u00ed. Nap\u0159\u00edklad anal\u00fdza CFF2 je 3,5kr\u00e1t rychlej\u0161\u00ed ne\u017e ve FreeType. Anal\u00fdza glyf\u016f je mezit\u00edm o 10 % pomalej\u0161\u00ed ne\u017e ve stb_truetype, ale to je zp\u016fsobeno t\u00edm, \u017ee nepodporuje prom\u011bnn\u00e9 fonty, pro jejich\u017e implementaci je t\u0159eba uchov\u00e1vat dodate\u010dn\u00e9 informace. V\u00edce podrobnost\u00ed v README<\/a>.<\/p>\n

    <\/noindex><\/p>\n

    Zdroj: linux.org.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

    ttf-parser — \u044d\u0442\u043e \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0430 \u0434\u043b\u044f \u0440\u0430\u0437\u0431\u043e\u0440\u0430 TrueType\/OpenType \u0448\u0440\u0438\u0444\u0442\u043e\u0432. \u0412 \u043d\u043e\u0432\u043e\u0439 \u0432\u0435\u0440\u0441\u0438\u0438 \u043f\u043e\u044f\u0432\u0438\u043b\u0430\u0441\u044c \u043f\u043e\u043b\u043d\u043e\u0446\u0435\u043d\u043d\u0430\u044f \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0430 \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u044b\u0445 \u0448\u0440\u0438\u0444\u0442\u043e\u0432 (variable fonts) \u0438 C API, \u0432\u0441\u043b\u0435\u0434\u0441\u0442\u0432\u0438\u0435 \u0447\u0435\u0433\u043e \u044f \u0440\u0435\u0448\u0438\u043b \u043f\u0440\u043e\u0440\u0435\u043a\u043b\u0430\u043c\u0438\u0440\u043e\u0432\u0430\u0442\u044c \u0435\u0451 \u043d\u0430 \u043b\u043e\u0440\u0435. \u0414\u043e \u043d\u0435\u0434\u0430\u0432\u043d\u0435\u0433\u043e \u0432\u0440\u0435\u043c\u0435\u043d\u0438, \u0435\u0441\u043b\u0438 \u0431\u044b\u043b\u0430 \u043d\u0435\u043e\u0431\u0445\u043e\u0434\u0438\u043c\u043e\u0441\u0442\u044c \u0440\u0430\u0431\u043e\u0442\u044b \u0441 TrueType \u0448\u0440\u0438\u0444\u0442\u0430\u043c\u0438, \u0431\u044b\u043b\u043e \u0440\u043e\u0432\u043d\u043e \u0434\u0432\u0430 \u0432\u0430\u0440\u0438\u0430\u043d\u0442\u0430: FreeType \u0438 stb_truetype. \u041f\u0435\u0440\u0432\u044b\u0439 \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u043e\u0433\u0440\u043e\u043c\u043d\u044b\u043c \u043a\u043e\u043c\u0431\u0430\u0439\u043d\u043e\u043c, \u0432\u0442\u043e\u0440\u043e\u0439 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u0435\u0442 \u0434\u043e\u0432\u043e\u043b\u044c\u043d\u043e \u043d\u0435\u0431\u043e\u043b\u044c\u0448\u043e\u0435 \u043a\u043e\u043b\u0438\u0447\u0435\u0441\u0442\u0432\u043e […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-74805","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47ttf-parser 0.5 \u2014 nov\u00e1 knihovna pro pr\u00e1ci s fonty TrueType | ProHoster","description":"ttf-parser je knihovna pro anal\u00fdzu font\u016f TrueType\/OpenType. Nov\u00e1 verze p\u0159in\u00e1\u0161\u00ed plnou podporu prom\u011bnn\u00fdch.","canonical_url":"https:\/\/prohoster.info\/cs\/blog\/news\/ttf-parser-0-5-novaya-biblioteka-dlya-raboty-s-truetype-shriftami","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"cs_CZ","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47ttf-parser 0.5 \u2014 \u043d\u043e\u0432\u0430\u044f \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0430 \u0434\u043b\u044f \u0440\u0430\u0431\u043e\u0442\u044b \u0441 TrueType \u0448\u0440\u0438\u0444\u0442\u0430\u043c\u0438 | ProHoster","og:description":"ttf-parser \u2014 \u044d\u0442\u043e \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0430 \u0434\u043b\u044f \u0440\u0430\u0437\u0431\u043e\u0440\u0430 TrueType\/OpenType \u0448\u0440\u0438\u0444\u0442\u043e\u0432. \u0412 \u043d\u043e\u0432\u043e\u0439 \u0432\u0435\u0440\u0441\u0438\u0438 \u043f\u043e\u044f\u0432\u0438\u043b\u0430\u0441\u044c \u043f\u043e\u043b\u043d\u043e\u0446\u0435\u043d\u043d\u0430\u044f \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0430 \u043f\u0435\u0440\u0435\u043c\u0435\u043d\u043d\u044b\u0445.","og:url":"https:\/\/prohoster.info\/cs\/blog\/news\/ttf-parser-0-5-novaya-biblioteka-dlya-raboty-s-truetype-shriftami","og:image":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:secure_url":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:width":350,"og:image:height":350,"article:published_time":"2020-03-20T17:42:28+00:00","article:modified_time":"2020-03-20T17:42:28+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":{"post_id":"74805","title":null,"description":null,"keywords":null,"keyphrases":null,"primary_term":null,"canonical_url":null,"og_title":null,"og_description":null,"og_object_type":"default","og_image_type":"default","og_image_url":null,"og_image_width":null,"og_image_height":null,"og_image_custom_url":null,"og_image_custom_fields":null,"og_video":null,"og_custom_url":null,"og_article_section":null,"og_article_tags":null,"twitter_use_og":false,"twitter_card":"default","twitter_image_type":"default","twitter_image_url":null,"twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_title":null,"twitter_description":null,"schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"","isEnabled":true},"graphs":[]},"schema_type":null,"schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":null,"robots_max_videopreview":null,"robots_max_imagepreview":"large","priority":null,"frequency":null,"local_seo":null,"seo_analyzer_scan_date":null,"breadcrumb_settings":null,"limit_modified_date":false,"reviewed_by":null,"ai":null,"created":"2021-02-28 18:07:28","updated":"2022-09-28 06:11:52","focus_keyword":null,"additional_keywords":null,"truseo_locale":null},"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts\/74805","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/comments?post=74805"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts\/74805\/revisions"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/media?parent=74805"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/categories?post=74805"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/tags?post=74805"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}