{"id":55442,"date":"2020-01-21T00:00:00","date_gmt":"2020-01-20T21:00:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/podgotovka-sdl2-proekta-dlya-zapuska-na-android"},"modified":"2020-02-18T14:03:33","modified_gmt":"2020-02-18T11:03:33","slug":"podgotovka-sdl2-proekta-dlya-zapuska-na-android","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/administrirovanie\/podgotovka-sdl2-proekta-dlya-zapuska-na-android","title":{"rendered":"Preparazione del progetto SDL2 per l'esecuzione su android","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Ciao a tutti. Oggi vedremo come preparare un progetto utilizzando la libreria sdl2 per avviare un gioco su Android.<br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><br \/>\nPer prima cosa, bisogna scaricare Android Studio, installarlo e tutto ci\u00f2 che \u00e8 necessario in questo ambiente di sviluppo. Ad esempio, io attualmente ho Kde Neon, e in questo sistema esiste un file \/etc\/environment, lo stesso file \u00e8 presente anche in ubuntu. Qui bisogna definire alcune variabili.<\/p>\n<pre><code class=\"plaintext\">ANDROID_HOME=\/home\/username\/Android\/Sdk\nANDROID_NDK_HOME=\/home\/username\/ndk\n<\/code><\/pre>\n<p>\nBisogna anche scaricare l'NDK dal sito ufficiale, decomprimerlo nella directory home e rinominarlo in NDK. Poi occorre scaricare la libreria SDL2 dal sito <noindex><a rel=\"nofollow\" href=\"https:\/\/www.libsdl.org\/\">libsdl.org<\/a><\/noindex>. Per utilizzare sdl2 su Android, \u00e8 importante non compilarlo per computer, perch\u00e9 in quel caso non funzionerebbe su Android. Per compilare il progetto, bisogna creare un progetto in Android Studio, qualsiasi esso sia, per accettare la licenza, altrimenti durante la compilazione SDL2 richieder\u00e0 la licenza.<\/p>\n<p>Per leggere i file in Android da assets, \u00e8 necessario utilizzare le funzioni SDL_RWops. Ecco un esempio di utilizzo nel codice per gestire i caratteri. In questo caso non possiamo utilizzare FT_New_Face, ma al suo posto utilizzeremo FT_New_Memory_Face, per utilizzare i dati gi\u00e0 letti.<\/p>\n<pre><code class=\"cpp\">#ifdef __ANDROID__\n        snprintf ( path, 254, &quot;fonts\/%s&quot;, file );\n        SDL_RWops *rw = SDL_RWFromFile(path, &quot;r&quot; );\n        char *memory = ( char * ) calloc ( rw-&gt;hidden.androidio.size, 1 );\n        SDL_RWread(rw, memory, 1, rw-&gt;hidden.androidio.size );\n\n        FT_New_Memory_Face(*this-&gt;ft_library, ( const FT_Byte  * )memory, rw-&gt;hidden.androidio.size, 0, &this;-&gt;face );\n        SDL_RWclose(rw);\n        free ( memory );\n#else\n        snprintf ( path, 254, &quot;%s\/fonts\/%s&quot;, DEFAULT_ASSETS, file );\n        if ( access ( path, F_OK ) ) {\n                fprintf ( stderr, &quot;not found font: %sn&quot;, path );\n                exit ( EXIT_FAILURE );\n        }\n        struct stat st;\n        stat ( path, &st; );\n        FILE *rw = fopen ( path, &quot;r&quot; );\n        char *memory = ( char * ) calloc ( st.st_size, 1 );\n        fread ( memory, 1, st.st_size, rw );\n\n        FT_New_Memory_Face ( *this-&gt;ft_library, ( const FT_Byte * ) memory, st.st_size, 0, &this;-&gt;face );\n        fclose ( rw );\n        free ( memory );\n#endif\n\n<\/code><\/pre>\n<p>\nHo anche creato un file di intestazione per includere le intestazioni SDL2. NO_SDL_GLEXT \u00e8 necessario affinch\u00e9 la compilazione vada a buon fine per Android.<\/p>\n<pre><code class=\"cpp\">#ifdef __ANDROID__\n#include &quot;SDL.h&quot;\n#include &quot;SDL_video.h&quot;\n#include &quot;SDL_events.h&quot;\n#define NO_SDL_GLEXT \n#include &quot;SDL_opengl.h&quot;\n#include &quot;SDL_opengles2.h&quot;\n#else\n#include &lt;SDL2\/SDL.h&gt;\n#include &lt;SDL2\/SDL_video.h&gt;\n#include &lt;SDL2\/SDL_opengl.h&gt;\n#include &lt;SDL2\/SDL_opengles2.h&gt;\n#endif\n<\/code><\/pre>\n<p>\nQuindi il progetto \u00e8 pronto, gli shader sono pronti per OpenGL ES 3.0. Ora bisogna creare un android-project. Per fare ci\u00f2, estraiamo l'archivio SDL2. Accediamo a build-scripts. Ed eseguiamo quanto segue.<\/p>\n<pre><code class=\"bash\">.\/androidbuild.sh com.xverizex.test main.cpp\n<\/code><\/pre>\n<p>\nComparir\u00e0 un messaggio simile.<\/p>\n<pre><code class=\"bash\">Per compilare e installare su un dispositivo per test, esegui il seguente comando:\ncd \/home\/cf\/programs\/SDL2-2.0.10\/build\/com.xverizex.test\n.\/gradlew installDebug\n<\/code><\/pre>\n<p>\nAndiamo in com.xverizex.test. Accediamo a com.xverizex.test\/app\/jni\/src. Copiamo il nostro progetto di gioco. E modifichiamo il file Android.mk, nel mio caso appare cos\u00ec.<\/p>\n<pre><code class=\"cpp\">LOCAL_PATH := $(call my-dir)\n\ninclude $(CLEAR_VARS)\n\nLOCAL_MODULE := main\n\nSDL_PATH := ..\/SDL\nFREETYPE_PATH := ..\/Freetype2\n\nLOCAL_C_INCLUDES := $(LOCAL_PATH)\/$(SDL_PATH)\/include $(LOCAL_PATH)\/$(FREETYPE_PATH)\/include\n\n# Aggiungi qui i tuoi file sorgente dell'applicazione...\nLOCAL_SRC_FILES := .\/engine\/lang.cpp .\/engine\/actor.cpp .\/engine\/sprite.cpp .\/engine\/shaders.cpp .\/engine\/box.cpp .\/engine\/menubox.cpp .\/engine\/load_manager.cpp .\/engine\/main.cpp .\/engine\/font.cpp .\/engine\/model.cpp .\/engine\/button.cpp .\/theme.cpp .\/level_manager.cpp .\/menu\/menu.cpp\n\nLOCAL_SHARED_LIBRARIES := SDL2 Freetype2\n\nLOCAL_LDLIBS := -lGLESv1_CM -lGLESv2 -llog \n\ninclude $(BUILD_SHARED_LIBRARY)\n<\/code><\/pre>\n<p>\nCome avrete gi\u00e0 notato, sto includendo anche la libreria Freetype2. Ho trovato una versione pronta su github per Android, ma non funzionava, \u00e8 stato necessario apportare alcune modifiche. Creiamo anche la cartella app\/src\/main\/assets. In essa inseriamo le nostre risorse (font, sprite, modelli 3D).<\/p>\n<p>Configuriamo Freetype2 per Android. Scarichiamo dal mio github <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/xverizex\/Android-Freetype2\">Link<\/a><\/noindex>, e copiamo la cartella Freetype2 nella cartella app\/jni\/. \u00c8 tutto pronto. Ora lanciamo il comando .\/gradlew installDebug in com.xverizex.test. Per poter aggiungere questo gioco ad Android, \u00e8 necessario abilitare il debug su Android. Per fare ci\u00f2, bisogna andare nelle impostazioni, accedere a \"Sistema\", poi in \"Informazioni sul tablet\" e toccare circa sei volte l'opzione \"Numero di build\". Poi tornate indietro e apparir\u00e0 l'opzione per gli sviluppatori. Entrate e attivatela, attivate anche l'opzione \"Debug USB\". Ora \u00e8 necessario ottenere una chiave per il tablet. A questo scopo, installiamo il programma adb. Avviamo adb shell nella console, e sul tablet si presenta una chiave che deve essere accettata. Ecco, ora i giochi possono essere caricati sul tablet.<br \/>\n<br \/>Fonte: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/484526\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412\u0441\u0435\u043c \u043f\u0440\u0438\u0432\u0435\u0442. \u0421\u0435\u0433\u043e\u0434\u043d\u044f \u043c\u044b \u043f\u043e\u0441\u043c\u043e\u0442\u0440\u0438\u043c \u043a\u0430\u043a \u043f\u043e\u0434\u0433\u043e\u0442\u043e\u0432\u0438\u0442\u044c \u043f\u0440\u043e\u0435\u043a\u0442 \u0441 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435\u043c \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438 sdl2 \u0434\u043b\u044f \u0437\u0430\u043f\u0443\u0441\u043a\u0430 \u0438\u0433\u0440\u044b \u043d\u0430 android. \u0414\u043b\u044f \u043d\u0430\u0447\u0430\u043b\u0430 \u043d\u0430\u0434\u043e \u0441\u043a\u0430\u0447\u0430\u0442\u044c Android Studio, \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u0438\u0442\u044c \u0435\u0451 \u0438 \u0432\u0441\u0451 \u0447\u0442\u043e \u0442\u0440\u0435\u0431\u0443\u0435\u0442\u0441\u044f \u0432 \u044d\u0442\u043e\u0439 \u0441\u0440\u0435\u0434\u0435 \u0434\u043b\u044f \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0438. \u041d\u0430\u043f\u0440\u0438\u043c\u0435\u0440 \u0443 \u043c\u0435\u043d\u044f \u0441\u0435\u0439\u0447\u0430\u0441 Kde Neon, \u0438 \u0432 \u044d\u0442\u043e\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u0435 \u0441\u0443\u0449\u0435\u0441\u0442\u0432\u0443\u0435\u0442 \u0444\u0430\u0439\u043b \/etc\/environment, \u0442\u0430\u043a\u043e\u0439 \u0436\u0435 \u0444\u0430\u0439\u043b \u0435\u0441\u0442\u044c \u0438 \u0432 ubuntu. \u0422\u0430\u043c [&hellip;]<\/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":[688],"tags":[],"class_list":["post-55442","post","type-post","status-publish","format-standard","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0412\u0441\u0435\u043c \u043f\u0440\u0438\u0432\u0435\u0442.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri Gagarin\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/prohoster.info\/it\/blog\/administrirovanie\/podgotovka-sdl2-proekta-dlya-zapuska-na-android\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.1.1\" \/>\n\t\t<meta property=\"og:locale\" content=\"it_IT\" \/>\n\t\t<meta property=\"og:site_name\" content=\"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"\ud83e\udd47\u041f\u043e\u0434\u0433\u043e\u0442\u043e\u0432\u043a\u0430 SDL2-\u043f\u0440\u043e\u0435\u043a\u0442\u0430 \u0434\u043b\u044f \u0437\u0430\u043f\u0443\u0441\u043a\u0430 \u043d\u0430 android | ProHoster\" \/>\n\t\t<meta property=\"og:description\" content=\"\u0412\u0441\u0435\u043c \u043f\u0440\u0438\u0432\u0435\u0442.\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/prohoster.info\/it\/blog\/administrirovanie\/podgotovka-sdl2-proekta-dlya-zapuska-na-android\" \/>\n\t\t<meta property=\"og:image\" content=\"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg\" \/>\n\t\t<meta property=\"og:image:secure_url\" content=\"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg\" \/>\n\t\t<meta property=\"og:image:width\" content=\"350\" \/>\n\t\t<meta property=\"og:image:height\" content=\"350\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2020-01-20T21:00:00+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2020-02-18T11:03:33+00:00\" \/>\n\t\t<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/prohoster\" \/>\n\t\t<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/prohoster\" \/>\n\t\t<!-- All in One SEO -->\n\n","aioseo_head_json":{"title":"\ud83e\udd47Preparazione del progetto SDL2 per l'esecuzione su android | ProHoster","description":"Ciao a tutti.","canonical_url":"https:\/\/prohoster.info\/it\/blog\/administrirovanie\/podgotovka-sdl2-proekta-dlya-zapuska-na-android","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"it_IT","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47\u041f\u043e\u0434\u0433\u043e\u0442\u043e\u0432\u043a\u0430 SDL2-\u043f\u0440\u043e\u0435\u043a\u0442\u0430 \u0434\u043b\u044f \u0437\u0430\u043f\u0443\u0441\u043a\u0430 \u043d\u0430 android | ProHoster","og:description":"\u0412\u0441\u0435\u043c \u043f\u0440\u0438\u0432\u0435\u0442.","og:url":"https:\/\/prohoster.info\/it\/blog\/administrirovanie\/podgotovka-sdl2-proekta-dlya-zapuska-na-android","og:image":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:secure_url":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:width":350,"og:image:height":350,"article:published_time":"2020-01-20T21:00:00+00:00","article:modified_time":"2020-02-18T11:03:33+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":{"post_id":"55442","title":null,"description":null,"keywords":null,"keyphrases":null,"primary_term":null,"canonical_url":null,"og_title":null,"og_description":null,"og_object_type":"default","og_image_type":"default","og_image_url":null,"og_image_width":null,"og_image_height":null,"og_image_custom_url":null,"og_image_custom_fields":null,"og_video":null,"og_custom_url":null,"og_article_section":null,"og_article_tags":null,"twitter_use_og":false,"twitter_card":"default","twitter_image_type":"default","twitter_image_url":null,"twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_title":null,"twitter_description":null,"schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"","isEnabled":true},"graphs":[]},"schema_type":null,"schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":null,"robots_max_videopreview":null,"robots_max_imagepreview":"large","priority":null,"frequency":null,"local_seo":null,"seo_analyzer_scan_date":null,"breadcrumb_settings":null,"limit_modified_date":false,"reviewed_by":null,"ai":null,"created":"2021-02-28 19:44:25","updated":"2022-10-04 17:24:27","focus_keyword":null,"additional_keywords":null,"truseo_locale":null},"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/posts\/55442","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/comments?post=55442"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/posts\/55442\/revisions"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/media?parent=55442"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/categories?post=55442"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/it\/wp-json\/wp\/v2\/tags?post=55442"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}