{"id":94546,"date":"2020-09-18T13:42:07","date_gmt":"2020-09-18T11:42:07","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/biblioteki-szhatiya-lzham-i-crunch-perevedeny-v-obshhestvennoe-dostoyanie"},"modified":"2020-09-18T13:42:07","modified_gmt":"2020-09-18T11:42:07","slug":"biblioteki-szhatiya-lzham-i-crunch-perevedeny-v-obshhestvennoe-dostoyanie","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/news\/biblioteki-szhatiya-lzham-i-crunch-perevedeny-v-obshhestvennoe-dostoyanie","title":{"rendered":"Le librerie di compressione LZHAM e Crunch sono state rese di pubblico dominio","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Rich Geldreich ha tradotto<\/a><\/noindex> le librerie di compressione da lui sviluppate LZHAM<\/a><\/noindex> e Crunch<\/a><\/noindex> nella categoria pubblico dominio<\/a><\/noindex> (Public Domain), cio\u00e8 ha completamente rinunciato ai diritti d'autore e ha consentito la distribuzione e l'uso in qualsiasi forma da parte di chiunque senza limitazioni. Per le giurisdizioni in cui la categoria di pubblico dominio non \u00e8 riconosciuta, sono state lasciate le relative note. In precedenza, i progetti erano distribuiti con licenze MIT e ZLIB.<\/p>\n

La libreria Crunch offre strumenti per la compressione e la ricodifica delle texture senza perdita di qualit\u00e0 utilizzando algoritmi DXTn<\/a><\/noindex>. Crunch supporta i formati di texture DXT1\/5\/N e 3DC e pu\u00f2 salvare i risultati nei formati DDS, CRN e KTX. <\/p>\n

LZHAM offre un algoritmo di compressione ottimizzato per l'imballaggio delle risorse fornite come parte delle applicazioni di gioco. Supporta un'API compatibile con Zlib. Tra le caratteristiche di LZHAM si segnala la possibilit\u00e0
\ndi utilizzare tabelle di corrispondenza (fino a 64 KB), dizionari (fino a 500 MB), parallelizzazione delle operazioni su pi\u00f9 thread e applicazione di modifiche delta, che consentono di distribuire le modifiche senza ricompattare i file gi\u00e0 compressi.<\/p>\n

In termini di livello di compressione e velocit\u00e0 di imballaggio, l'implementazione di LZHAM \u00e8 comparabile a LZMA, ma la velocit\u00e0 di decompressione supera LZMA di 1.5-8 volte (ma \u00e8 pi\u00f9 lenta di zlib). Rispetto a ZSTD, LZHAM supera questo algoritmo per efficienza di compressione, ma \u00e8 quasi un ordine di grandezza pi\u00f9 lento in termini di velocit\u00e0 di codifica e un poco pi\u00f9 lento nella velocit\u00e0 di decodifica.<\/p>\n

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

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

\u0420\u0438\u0447 \u0413\u0435\u043b\u0434\u0440\u0438\u0445 (Rich Geldreich) \u043f\u0435\u0440\u0435\u0432\u0451\u043b \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0430\u043d\u043d\u044b\u0435 \u0438\u043c \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438 \u0441\u0436\u0430\u0442\u0438\u044f LZHAM \u0438 Crunch \u0432 \u043a\u0430\u0442\u0435\u0433\u043e\u0440\u0438\u044e \u043e\u0431\u0449\u0435\u0441\u0442\u0432\u0435\u043d\u043d\u043e\u0433\u043e \u0434\u043e\u0441\u0442\u043e\u044f\u043d\u0438\u044f (Public Domain), \u0442.\u0435. \u043f\u043e\u043b\u043d\u043e\u0441\u0442\u044c\u044e \u043e\u0442\u043a\u0430\u0437\u0430\u043b\u0441\u044f \u043e\u0442 \u0438\u043c\u0443\u0449\u0435\u0441\u0442\u0432\u0435\u043d\u043d\u044b\u0445 \u0430\u0432\u0442\u043e\u0440\u0441\u043a\u0438\u0445 \u043f\u0440\u0430\u0432 \u0438 \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u0438\u043b \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c 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