{"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\/hr\/blog\/news\/ttf-parser-0-5-novaya-biblioteka-dlya-raboty-s-truetype-shriftami","title":{"rendered":"ttf-parser 0.5 - nova biblioteka za rad s TrueType fontovima","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

<\/p>\n

ttf-parser<\/a> — to je knji\u017enica za analizu TrueType\/OpenType fontova.<\/noindex>
\nU novoj verziji uvedena je potpuna podr\u0161ka za varijabilne fontove.
\n(varijabilni fontovi<\/a>) i C API, zbog \u010dega sam odlu\u010dio promovirati je na forumu.<\/p>\n

Do nedavno, ako je postojala potreba za radom s TrueType fontovima, postojale su upravo dvije opcije: FreeType i stb_truetype. Prvi je ogroman stroj, a drugi podr\u017eava prili\u010dno mali broj funkcija.<\/p>\n

ttf-parser se nalazi negdje izme\u0111u. Podr\u017eava sve iste TrueType tablice (format TrueType sastoji se od niza odvojenih binarnih tablica) kao i FreeType, ali se ne bavi crtanje samih glifova.<\/p>\n

Pri tome, ttf-parser sadr\u017ei mno\u0161tvo drugih zna\u010dajnih razlika:<\/p>\n

    \n
  1. ttf-parser je napisan na Rustu bez uporabe unsafe. FreeType i stb_truetype napisani su na C-u.<\/li>\n
  2. ttf-parser je jedina sigurna (memory-safe) implementacija. \u010citanje proizvoljne memorije nije mogu\u0107e. U FreeType-u se stalno ispravljaju ranjivosti, dok stb_truetype u na\u010delu nije namijenjen za \u010ditanje proizvoljnih fontova.<\/li>\n
  3. ttf-parser je jedina thread-safe implementacija. Sve metode analize su konstantne. Jedina iznimka je postavljanje koordinata za varijabilne fontove, ali ta funkcija je reentrant. FreeType je u osnovi jednostruko nitni. stb_truetype — reentrant (mo\u017eete koristiti odvojene kopije u razli\u010ditim nitima, ali ne jednu iz vi\u0161e).<\/li>\n
  4. ttf-parser je jedina implementacija koja ne koristi alokacije u «hrpi». To omogu\u0107uje br\u017eu analizu i izbjegava probleme prilikom OOM.<\/li>\n
  5. Tako\u0111er, gotovo sve aritmeti\u010dke operacije i konverzije numeri\u010dkih tipova se provjeravaju (uklju\u010duju\u0107i stati\u010dki).<\/li>\n
  6. U najgorem slu\u010daju, knji\u017enica mo\u017ee baciti iznimku. U tom slu\u010daju u C API-ju \u0107e iznimke biti uhva\u0107ene i funkcija \u0107e vratiti gre\u0161ku, ali se ne\u0107e sru\u0161iti.<\/li>\n<\/ol>\n

    <\/p>\n

    I unato\u010d svim sigurnosnim garancijama, ttf-parser je tako\u0111er najbr\u017ea implementacija. Na primjer, analiza CFF2 je 3,5 puta br\u017ea od FreeType-a. Analiza glyf-a je, me\u0111utim, 10% sporija od stb_truetype, ali to je zbog toga \u0161to ne podr\u017eava varijabilne fontove, za \u010diju je implementaciju potrebno \u010duvati dodatne informacije. Vi\u0161e detalja u README<\/a>.<\/p>\n

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

    Izvor: 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 nova knji\u017enica za rad s TrueType fontovima | ProHoster","description":"ttf-parser je knji\u017enica za analizu TrueType\/OpenType fontova. 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