{"id":102696,"date":"2021-12-21T21:36:58","date_gmt":"2021-12-21T19:37:01","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/dlya-os-haiku-predlozhen-sloj-sovmestimosti-s-xlib-x11"},"modified":"2021-12-21T21:36:58","modified_gmt":"2021-12-21T19:37:01","slug":"dlya-os-haiku-predlozhen-sloj-sovmestimosti-s-xlib-x11","status":"publish","type":"post","link":"https:\/\/prohoster.info\/ro\/blog\/news\/dlya-os-haiku-predlozhen-sloj-sovmestimosti-s-xlib-x11","title":{"rendered":"Pentru sistemul de operare Haiku a fost propus un strat de compatibilitate cu Xlib\/X11","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Dezvoltatorii sistemului de operare deschis Haiku, care continu\u0103 dezvoltarea ideilor BeOS, au preg\u0103tit o implementare ini\u021bial\u0103 a unui strat pentru asigurarea compatibilit\u0103\u021bii cu biblioteca Xlib, care permite rularea aplica\u021biilor X11 \u00een Haiku f\u0103r\u0103 utilizarea serverului X. Straturile sunt realizate prin emularea func\u021biilor Xlib prin intermediul traducerii apelurilor \u00een API-ul grafic de nivel \u00eenalt Haiku. <\/p>\n

\u00cen forma sa actual\u0103, stratul ofer\u0103 majoritatea interfe\u021belor de programare Xlib utilizate frecvent, dar unele apeluri au r\u0103mas \u00eenlocuite cu stuburi. Stratului \u00eei permite compilarea \u0219i rularea aplica\u021biilor bazate pe biblioteca GTK, dar calitatea aranj\u0103rii elementelor \u00een feronerie necesit\u0103 \u00eenc\u0103 \u00eembun\u0103t\u0103\u021biri. Prelucrarea intr\u0103rii prin intermediul tastaturii \u0219i a click-urilor cu mouse-ul nu este \u00eenc\u0103 complet func\u021bional\u0103 (a fost ad\u0103ugat doar procesarea evenimentului de mi\u0219care a mouse-ului). <\/p>\n

Suportul pentru biblioteca Qt \u00een Haiku a fost realizat anterior prin crearea unui port nativ Qt care func\u021bioneaz\u0103 deasupra API-ului Haiku. Dar pentru suportul GTK, utilizarea emul\u0103rii X11 este considerat\u0103 o op\u021biune mai preferat\u0103, deoarece fundamentele GTK nu sunt foarte bine abstractizate \u0219i crearea unui backend GTK separat pentru Haiku ar necesita resurse semnificative. Ca solu\u021bie, s-a considerat posibilitatea cre\u0103rii unui port X11-server<\/a> pentru Haiku, dar aceast\u0103 abordare a fost considerat\u0103 inoportun\u0103 \u00een condi\u021biile \u00een care API-ul X11 poate fi implementat direct deasupra API-ului Haiku. X11 a fost ales ca un protocol stabilizat \u0219i neschimbat de mult timp, \u00een timp ce experimentele cu Wayland continu\u0103, fiind necesar\u0103 crearea unei implement\u0103ri proprii a serverului \u0219i nu toate extensiile necesare ale protocolului sunt finalizate.

\"Pentru<\/center> <\/p>\n

La rularea aplica\u021biilor mai simple prin intermediul stratului, cum ar fi cele pe Tcl\/Tk \u0219i wxWidgets, se observ\u0103 \u0219i probleme \u00eenc\u0103 nerezolvate, dar aspectul este deja mai aproape de normal:

\"Pentru<\/center>
\"Pentru<\/center>
\"Pentru<\/center> <\/p>\n

Amintim c\u0103 proiectul Haiku a fost creat \u00een 2001 ca un r\u0103spuns la oprirea dezvolt\u0103rii sistemului de operare BeOS \u0219i s-a dezvoltat sub denumirea OpenBeOS, dar a fost redenumit \u00een 2004 din cauza unor reclama\u021bii legate de utilizarea m\u0103rcii comerciale BeOS. Sistemul se bazeaz\u0103 direct pe tehnologiile BeOS 5 \u0219i este destinat compatibilit\u0103\u021bii binare cu aplica\u021biile pentru acest OS. Codurile surs\u0103 pentru cea mai mare parte a OS-ului Haiku sunt distribuite sub licen\u021ba liber\u0103 MIT, cu excep\u021bia unor biblioteci, codec-uri media \u0219i componente preluate din alte proiecte. <\/p>\n

Sistemul este destinat PC-urilor personale, utiliz\u00e2nd un nucleu propriu, construit pe o arhitectur\u0103 hibrid\u0103, optimizat pentru o reac\u021bie rapid\u0103 la ac\u021biunile utilizatorului \u0219i pentru executarea eficient\u0103 a aplica\u021biilor multithreading. Ca sistem de fi\u0219iere se folose\u0219te OpenBFS, care suport\u0103 atribute extinse ale fi\u0219ierelor, jurnalizare, pointeri de 64 de bi\u021bi, suport pentru stocarea meta-tag-urilor (pentru fiecare fi\u0219ier se pot salva atribute sub form\u0103 de cheie=valoare, ceea ce face ca sistemul de fi\u0219iere s\u0103 semene cu o baz\u0103 de date) \u0219i indec\u0219i speciali pentru a accelera interog\u0103rile. Pentru organizarea structurii directoarelor se utilizeaz\u0103 arbori de tip \u201eB+ tree\u201d. Din codul BeOS, \u00een Haiku a fost inclus managerul de fi\u0219iere Tracker \u0219i bara de instrumente Deskbar, a c\u0103ror cod surs\u0103 a fost deschis dup\u0103 \u00eencetarea dezvolt\u0103rii BeOS.
\n
Sursa: opennet.ro<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0420\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0438 \u043e\u0442\u043a\u0440\u044b\u0442\u043e\u0439 \u043e\u043f\u0435\u0440\u0430\u0446\u0438\u043e\u043d\u043d\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u044b Haiku, \u043f\u0440\u043e\u0434\u043e\u043b\u0436\u0430\u044e\u0449\u0435\u0439 \u0440\u0430\u0437\u0432\u0438\u0442\u0438\u0435 \u0438\u0434\u0435\u0439 BeOS, \u043f\u043e\u0434\u0433\u043e\u0442\u043e\u0432\u0438\u043b\u0438 \u043d\u0430\u0447\u0430\u043b\u044c\u043d\u0443\u044e \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044e \u043f\u0440\u043e\u0441\u043b\u043e\u0439\u043a\u0438 \u0434\u043b\u044f \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0435\u043d\u0438\u044e \u0441\u043e\u0432\u043c\u0435\u0441\u0442\u0438\u043c\u043e\u0441\u0442\u0438 \u0441 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u043e\u0439 Xlib, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0443\u044e 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