{"id":34420,"date":"2019-10-31T21:58:13","date_gmt":"2019-10-31T18:58:13","guid":{"rendered":"https:\/\/prohoster.info\/blog\/google-i-binomial-otkryli-kod-sistemy-szhatiya-tekstur-basis-universal\/"},"modified":"2019-10-31T21:58:13","modified_gmt":"2019-10-31T18:58:13","slug":"google-i-binomial-otkryli-kod-sistemy-szhatiya-tekstur-basis-universal","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/news\/google-i-binomial-otkryli-kod-sistemy-szhatiya-tekstur-basis-universal","title":{"rendered":"Google ja Binomial avasid Basis Universal tekstuuride kompressioonis\u00fcsteemi koodi","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Google ja Binomial avaldasid<\/a><\/noindex> allika koodid Basis Universal<\/a><\/noindex>, kodek t\u00f5husaks tekstuuride tihendamiseks ja sellega seotud universaalne failivormaat «.basis» piltide ja videote p\u00f5hjal tekstuuride jagamiseks. Standardrakenduse kood on kirjutatud C++ keeles ja toimetatakse<\/a><\/noindex> lisensiga Apache 2.0. <\/p>\n

Basis Universal t\u00e4iendab varem avaldatud<\/a><\/noindex> 3D-andmete tihendamise s\u00fcsteemi Draco ja p\u00fc\u00fcab lahendada tekstuuride pakkumise probleemi GPU-dele. Seni olid arendajad piiratud valikuga, mis koosneb kas madala taseme formaatidest, mis tagavad k\u00f5rge j\u00f5udluse, kuid on GPU-le spetsiifilised ja v\u00f5tavad palju kettaruumi, v\u00f5i muudest formaatidest, mis v\u00f5imaldavad andmete v\u00e4hendamist, kuid ei suuda konkureerida GPU tekstuuride j\u00f5udlusega.<\/p>\n

Basis Universal formaat v\u00f5imaldab saavutada GPU tekstuuride algtaseme j\u00f5udlust, kuid pakub k\u00f5rgemat tihendustaset.
\nBasis on vahepealne formaat, mis v\u00f5imaldab kiiret \u00fcmberkodeerimist erinevatesse madala taseme GPU tekstuuriformaatidesse, mida kasutatakse nii lauaarvutites kui ka mobiilseadmetes. Praegu toetatakse \u00fcmberkodeerimist PVRTC1 (4bpp RGB), BC7 (re\u017eiim 6 RGB), BC1-5, ETC1 ja ETC2 formaatidesse. Tulevikus oodatakse toetust ASTC formaadile (RGB v\u00f5i RGBA) ning BC7 formaadi re\u017eiimidele 4\/5 RGBA ja 4bpp RGBA PVRTC1 jaoks.<\/p>\n

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

Basis formaadis tekstuurid v\u00f5tavad 6-8 korda v\u00e4hem videom\u00e4lu ja vajavad andmete edastamiseks umbes kaks korda v\u00e4hem andmeid kui t\u00fc\u00fcpilised JPEG formaadis tekstuurid ning 10-25% v\u00e4hem kui RDO re\u017eiimis tekstuurid. N\u00e4iteks JPEG pildi suurus on 891 KB ja ETC1 tekstuuri suurus 1 MB, Basis formaadis andmete suurus on k\u00f5ige k\u00f5rgema kvaliteedi re\u017eiimis 469 KB. Tekstuuri viies videom\u00e4lu, kasutatud testitavad tekstuurid JPEG ja PNG formaadis kulutasid 16 MB m\u00e4lu, samas kui Basis formaadis tekstuurite jaoks oli BC1, PVRTC1 ja ETC1 formaadile vajaminev m\u00e4lu 2 MB ning BC7 formaadi korral 4 MB.
\nBasis formaadis tekstuuride jaoks oli BC1, PVRTC1 ja ETC1 formaadis 2 MB m\u00e4lu ning BC7 puhul 4 MB.<\/p>\n

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

Olemasolevate rakenduste viimine Basis Universali on piisavalt lihtne. Piisab, kui kodeerida olemasolevad tekstuurid v\u00f5i pildid uude formaati projekti poolt pakutava utiliidi «basisu» abil, valides vajaliku kvaliteeditaseme. Peale selle tuleb rakenduses enne renderdamiskoodi initsialiseerida basisu kodeerija, mis vastutab vaheformaadi edastamise eest praeguse GPU toetatava formaati. Sel juhul j\u00e4\u00e4vad k\u00f5ik pildid kogu t\u00f6\u00f6tlemisahela jooksul tihendatuks, sealhulgas laaditakse need GPU-sse tihendatud kujul. Selle asemel, et eelnevalt kogu pilti uudistada, dekodeerib GPU valikuliselt ainult vajalikud osad pildist. <\/p>\n

Toetatakse erinevate tekstuurimassiivide (cubemap), ruumiliste tekstuuride, tekstuurimassiivide, mipmap tasemete, video-sekveniliste v\u00f5i suvaliste teksturaalsete l\u00f5ikude salvestamist \u00fchte faili. N\u00e4iteks on v\u00f5imalik \u00fchte faili pakendada seeria pilte, et luua l\u00fchikeseid videoid v\u00f5i kombineerida mitmeid tekstuure, kasutades k\u00f5igile piltidele \u00fchte ja sama paletti ning t\u00fcpiseeritud pildimusterite deduplikatsiooni. Basis Universali kodeerija rakendamine toetab mitme protsessi kodeerimist, kasutades OpenMP-d. Kodeerija t\u00f6\u00f6tab praegu ainult \u00fches protsessis.<\/p>\n

Lisaks saadaval<\/a><\/noindex> Basis Universali dekodeerija brauseritele, mis on saadaval WebAssembly formaadis, mida saab kasutada WebGL-p\u00f5histes veebirakendustes. L\u00f5ppkokkuv\u00f5ttes kavatseb Google saavutada Basis Universali toetuse k\u00f5igis peamistes brauserites ja edendada seda kui \u00fclekantavat tekstuuriformaati WebGL-i ja tuleviku spetsifikatsiooni jaoks. WebGPU<\/a><\/noindex>, mille kontseptsioon sarnaneb API Vulkan, Metal ja Direct3D 12-ga. <\/p>\n

P\u00f6\u00f6ratakse t\u00e4helepanu sellele, et video integreerimise v\u00f5imalus koos selle edasise t\u00f6\u00f6tlemisega ainult GPU poolel teeb Basis Universali huvitavaks lahenduseks d\u00fcnaamiliste kasutajaliideste loomiseks WebAssembly ja WebGL-is, kus samal ajal v\u00f5ivad peegelduda sadu v\u00e4ikeseid videoid, minimeeritud koormusega CPU-le. Enne SIMD juhiste kasutamise v\u00f5imaluse tulekut WebAssembly-s, ei ole selline j\u00f5udlus traditsiooniliste koodekite puhul seni saavutatav, seega saab tekstuurip\u00f5hiseid videoid kasutada valdkondades, kus tavaline video ei ole rakendatav. Hetkel on valmimas kood lisaprobleemide optimeerimiseks video jaoks, sealhulgas I- ja P-kaadreid<\/a><\/noindex> koos adaptiivse t\u00e4itmise toega (CR). <\/p>\n

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

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

\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u0438 Google \u0438 Binomial \u043e\u0442\u043a\u0440\u044b\u043b\u0438 \u0438\u0441\u0445\u043e\u0434\u043d\u044b\u0435 \u0442\u0435\u043a\u0441\u0442\u044b Basis Universal, \u043a\u043e\u0434\u0435\u043a\u0430 \u0434\u043b\u044f \u044d\u0444\u0444\u0435\u043a\u0442\u0438\u0432\u043d\u043e\u0433\u043e \u0441\u0436\u0430\u0442\u0438\u044f \u0442\u0435\u043a\u0441\u0442\u0443\u0440 \u0438 \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u043e\u0433\u043e \u0441 \u043d\u0438\u043c \u0443\u043d\u0438\u0432\u0435\u0440\u0441\u0430\u043b\u044c\u043d\u043e\u0433\u043e \u0444\u0430\u0439\u043b\u043e\u0432\u043e\u0433\u043e \u0444\u043e\u0440\u043c\u0430\u0442\u0430 «.basis» \u0434\u043b\u044f \u0440\u0430\u0441\u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u044f \u0442\u0435\u043a\u0441\u0442\u0443\u0440 \u043d\u0430 \u0431\u0430\u0437\u0435 \u0438\u0437\u043e\u0431\u0440\u0430\u0436\u0435\u043d\u0438\u0439 \u0438 \u0432\u0438\u0434\u0435\u043e. \u041a\u043e\u0434 \u044d\u0442\u0430\u043b\u043e\u043d\u043d\u043e\u0439 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 \u043d\u0430\u043f\u0438\u0441\u0430\u043d \u043d\u0430 \u044f\u0437\u044b\u043a\u0435 \u0421++ \u0438 \u043f\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u043f\u043e\u0434 \u043b\u0438\u0446\u0435\u043d\u0437\u0438\u0435\u0439 Apache 2.0. 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[…]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":25932,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-34420","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\udd47Google ja Binomial avalikustasid Basis Universal tekstuuride tihendamise s\u00fcsteemi koodi | ProHoster","description":"Ettev\u00f5tted Google ja Binomial avalikustasid allika 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