{"id":81072,"date":"2020-05-10T19:42:00","date_gmt":"2020-05-10T17:42:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/razrabotchiki-steka-shriftov-linux-otkazalis-ot-podderzhki-myagkogo-sglazhivaniya"},"modified":"2020-05-10T19:42:00","modified_gmt":"2020-05-10T17:42:00","slug":"razrabotchiki-steka-shriftov-linux-otkazalis-ot-podderzhki-myagkogo-sglazhivaniya","status":"publish","type":"post","link":"https:\/\/prohoster.info\/ro\/blog\/news\/razrabotchiki-steka-shriftov-linux-otkazalis-ot-podderzhki-myagkogo-sglazhivaniya","title":{"rendered":"Dezvoltatorii pachetului de fonturi Linux au renun\u021bat la suportul pentru antialiasing-ul moale.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Unii utilizatori care folosesc metoda de hinting \u201ehintfull\u201d au observat c\u0103 trecerea de la versiunea Pango 1.43 la 1.44 kerning<\/a><\/noindex> unor familii de fonturi s-a deteriorat<\/a><\/noindex> sau complet<\/a><\/noindex> a e\u0219uat<\/a><\/noindex>.<\/p>\n

\"Dezvoltatorii<\/a><\/noindex><\/center><\/p>\n

Problema este cauzat\u0103 de faptul c\u0103 biblioteca Pango<\/a><\/noindex> a trecut de la utilizarea FreeType<\/a><\/noindex> pentru a ob\u021bine informa\u021bii despre kerning (distan\u021ba dintre glyph-uri) la HarfBuzz<\/a><\/noindex>, iar dezvoltatorii acesteia au decis s\u0103 nu mai sus\u021bin\u0103<\/a><\/noindex> antialiasing al fonturilor conform metodei \u201ehintfull\u201d. Se observ\u0103 c\u0103 pe ecranele cu o densitate mare a pixelilor (Hi-DPI), nu apar probleme de afi\u0219are a fonturilor atunci c\u00e2nd se folosesc metode de hinting diferite de \u201ehintfull\u201d.<\/p>\n

R\u0103spuns<\/a><\/noindex> dezvoltatorul HarfBuzz (Behdad Esfahbod) din discu\u021bia referitoare la problem\u0103:<\/p>\n

\n

Am \u00eencercat s\u0103 folosesc stiluri de hinting diferite de hintfull, dar doar acesta ofer\u0103 o redare a fonturilor apropiat\u0103 de ClearType v2 \u00een Windows 7, care, \u00een opinia mea, are cea mai bun\u0103 redare dintre toate solu\u021biile existente.<\/i><\/p>\n

A\u0219a este. De aceea am decis s\u0103 nu-l mai sus\u021binem. Pute\u021bi \u00eencerca s\u0103 v\u0103 obi\u0219nui\u021bi cu redarea \u201eneclar\u0103\u201d sau s\u0103 c\u0103uta\u021bi altceva. De fapt, folosi\u021bi Open Source, nu-i a\u0219a?<\/p><\/blockquote>\n<\/blockquote>\n

O completare \u00een urma unei discu\u021bii suplimentare: <\/p>\n

\u00cen comentariile ulterioare, dezvoltatorul a explicat<\/a><\/noindex>, c\u0103 software-ul open-source ofer\u0103 posibilitatea alegerii, iar cei care nu sunt mul\u021bumi\u021bi de starea actual\u0103 pot crea un fork Pango. Dezvoltatorii HarfBuzz nu pot influen\u021ba \u00eentre\u021binerea sa \u0219i deciziile ce sunt luate \u00een cadrul acestuia. Behdad Esfahbod, actualul men\u021binator al HarfBuzz, care ocup\u0103 primul loc dup\u0103 num\u0103rul de commit-uri \u00een ambele<\/a><\/noindex>
\nproiecte<\/a><\/noindex>, a men\u021bionat c\u0103 nu mai este asociat cu Red Hat de peste 10 ani \u0219i nu este men\u021bin\u0103tor al Pango. Din 2010 a trecut la Google \u0219i se ocup\u0103 acum doar cu HarfBuzz, care anterior a fost proiectul s\u0103u personal. HarfBuzz nu controleaz\u0103<\/a><\/noindex> procesul de redare \u0219i Pango poate redefini modurile de hinting solicitate de partea sa. <\/p>\n

Un alt dezvoltator HarfBuzz c\u0103 niciunul dintre compilatoarele existente nu produce binare \u00een format a.out, astfel c\u0103 nu mai are sens.<\/a><\/noindex>, c\u0103 problema este de partea Pango, deoarece HarfBuzz nu este un sistem de redare a fonturilor \u0219i nu sus\u021bine hinting-ul prin arhitectura sa. Dac\u0103 Pango necesit\u0103 p\u0103strarea hinting-ului, atunci trecerea la HarfBuzz nu este alegerea care s\u0103 a\u0219tepte suportul s\u0103u. \u00cen calitate<\/a><\/noindex> motivul pentru care implementarea hinting-ului \u00een HarfBuzz nu a fost realizat\u0103 este c\u0103 anumite moduri de hinting duc la modificarea l\u0103\u021bimii ini\u021biale a glyph-ului \u0219i aceast\u0103 modificare depinde de dimensiunea pixelilor. Anterior, Pango efectua opera\u021biuni similare prin FreeType, care suporta hinting, dar apoi a trecut la HarfBuzz, care asigur\u0103 procesarea glyph-urilor f\u0103r\u0103 a fi legat de dimensiunea lor. Prin urmare, solu\u021bia problemelor ap\u0103rute la utilizarea Pango este \u00een responsabilitatea Pango, nu a HarfBuzz.<\/p>\n

\u00cen cele din urm\u0103, Behdad Esfahbod a publicat<\/a><\/noindex> o mare retrospectiv\u0103 asupra evolu\u021biei stivei de fonturi Linux. Dup\u0103 ce a plecat la Google, bibliotecile Pango \u0219i Cairo au fost practic abandonate \u0219i au c\u0103zut \u00een stagnare. \u00cen HarfBuzz, munca s-a concentrat pe suportul fonturilor variabile, iar Red Hat a pus accentul pe GTK \u0219i Glib. Cu timpul, inova\u021biile din domeniul fonturilor variabile au fost transferate \u00een FreeType, fontconfig \u0219i Cairo, dar au r\u0103mas neterminate \u00een Pango din cauza lipsei de dezvoltatori. Accesul la noile API-uri \u00een Pango a fost oferit prin abstractizarea FontMap \u0219i a fost sus\u021binut doar pentru backend-urile bazate pe FreeType. Backend-urile pentru Windows \u0219i macOS au r\u0103mas f\u0103r\u0103 suport de peste 10 ani. <\/p>\n

Dup\u0103 expansiunea dispozitivelor mobile \u0219i a browserelor, Microsoft a oprit \u00een Windows 8 suportul pentru redarea subpixel a fonturilor \u0219i pentru desenarea \u00een stil GDI. macOS a sus\u021binut \u00eentotdeauna redarea, care \u00een aceast\u0103 discu\u021bie este denumit\u0103 \u201eneclar\u0103\u201d. Din 2018, mai mul\u021bi dezvoltatori HarfBuzz au \u00eencercat s\u0103 integreze func\u021bionalit\u0103\u021bile ad\u0103ugate \u00een ultimii ani \u00een HarfBuzz \u00een Pango. \u00cen paralel, \u00een timpul dezvolt\u0103rii GTK4, s-a realizat trecerea la redarea pe baz\u0103 de OpenGL, care implic\u0103 scalarea liniar\u0103 a textului, ceea ce a accentuat confruntarea dintre redarea pixelat\u0103 \u0219i aranjamentul scalabil.<\/p>\n

LibreOffice, Chrome \u0219i Firefox au trecut la utilizarea HarfBuzz ca motor de shaping unificat, renun\u021b\u00e2nd la suportul pentru fonturile raster \u0219i formatul Type1. Pentru fonturile raster, celor care aveau nevoie de ele li s-a propus s\u0103 le transforme \u00een container OpenType. A fost trimis\u0103 o solicitare c\u0103tre Adobe pentru implementarea Type1 pentru HarfBuzz, dar au r\u0103spuns c\u0103 nu are sens, deoarece ei \u00een\u0219i\u0219i renun\u021b\u0103 la suportul pentru Type1 \u00een acest an. <\/p>\n

Pentru a \u021bine pasul cu tehnologiile avansate, o solu\u021bie similar\u0103 de tranzi\u021bie la HarfBuzz a fost adoptat\u0103 \u0219i pentru biblioteca Pango. Pre\u021bul a fost \u00eencetarea suportului pentru unele tehnologii mai vechi de 20 de ani. S-a indicat c\u0103, av\u00e2nd \u00een vedere resursele limitate ale dezvoltatorilor, nu exist\u0103 suficient personal pentru toate cerin\u021bele, iar cei interesa\u021bi de p\u0103strarea tehnologiilor vechi pot \u00eencerca s\u0103 g\u0103seasc\u0103 pe cineva dispus s\u0103 se ocupe de func\u021bionalitatea lips\u0103. Ca exemplu se men\u021bioneaz\u0103 GNOME3, dup\u0103 apari\u021bia c\u0103ruia nemul\u021bumi\u021bii au reu\u0219it s\u0103 continue dezvoltarea tehnologiilor \u00eenvechite GNOME2 \u00een cadrul proiectelor Mate \u0219i Cinnamon. Acelea\u0219i lucruri sunt valabile \u0219i pentru Pango, \u00eens\u0103 deocamdat\u0103 nu s-au g\u0103sit doritori.<\/p>\n

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

Sursa: opennet.ro<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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\u0432\u044b\u0437\u0432\u0430\u043d\u0430 \u0442\u0435\u043c, \u0447\u0442\u043e \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0430 Pango \u043f\u0435\u0440\u0435\u0448\u043b\u0430 \u043e\u0442 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u044f FreeType \u0434\u043b\u044f \u043f\u043e\u043b\u0443\u0447\u0435\u043d\u0438\u044f \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u0438 \u043e \u043a\u0451\u0440\u043d\u0438\u043d\u0433\u0435 (\u0440\u0430\u0441\u0441\u0442\u043e\u044f\u043d\u0438\u0438 \u043c\u0435\u0436\u0434\u0443 \u0433\u043b\u0438\u0444\u0430\u043c\u0438) \u0448\u0440\u0438\u0444\u0442\u043e\u0432 \u043a HarfBuzz, \u0430 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0438 \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0435\u0433\u043e \u043f\u0440\u0438\u043d\u044f\u043b\u0438 \u0440\u0435\u0448\u0435\u043d\u0438\u0435 \u043d\u0435 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u0442\u044c \u0441\u0433\u043b\u0430\u0436\u0438\u0432\u0430\u043d\u0438\u0435 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":81073,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-81072","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\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\n","aioseo_head_json":{"title":"\ud83e\udd47Dezvoltatorii stivei de fonturi Linux au renun\u021bat la suportul pentru antialiasing | ProHoster","description":"Unii utilizatori care folosesc metoda de hinting \"hintfull\" au putut observa c\u0103, \u00een timpul tranzi\u021biei de la versiunea Pango 1.43 la 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