{"id":4503,"date":"2018-08-31T23:14:24","date_gmt":"2018-08-31T15:14:24","guid":{"rendered":"http:\/\/www.bookcard.net\/wordpress\/?p=4503"},"modified":"2018-10-14T21:26:52","modified_gmt":"2018-10-14T13:26:52","slug":"android_game_texture_mipmap","status":"publish","type":"post","link":"https:\/\/www.bookcard.net\/wordpress\/android_game_texture_mipmap\/","title":{"rendered":"Android\u904a\u6232\u4e4b\u7d0b\u7406\u93c8Mipmap"},"content":{"rendered":"<figure id=\"attachment_4504\" aria-describedby=\"caption-attachment-4504\" style=\"width: 1200px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/www.bookcard.net\/wordpress\/wp-content\/uploads\/2018\/08\/Android_Game_Texture_Mipmap.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-4504\" src=\"https:\/\/www.bookcard.net\/wordpress\/wp-content\/uploads\/2018\/08\/Android_Game_Texture_Mipmap.jpg\" alt=\"\" width=\"1200\" height=\"800\" srcset=\"https:\/\/www.bookcard.net\/wordpress\/wp-content\/uploads\/2018\/08\/Android_Game_Texture_Mipmap.jpg 1200w, https:\/\/www.bookcard.net\/wordpress\/wp-content\/uploads\/2018\/08\/Android_Game_Texture_Mipmap-300x200.jpg 300w, https:\/\/www.bookcard.net\/wordpress\/wp-content\/uploads\/2018\/08\/Android_Game_Texture_Mipmap-768x512.jpg 768w, https:\/\/www.bookcard.net\/wordpress\/wp-content\/uploads\/2018\/08\/Android_Game_Texture_Mipmap-1024x683.jpg 1024w\" sizes=\"auto, (max-width: 1200px) 100vw, 1200px\" \/><\/a><figcaption id=\"caption-attachment-4504\" class=\"wp-caption-text\">Android\u904a\u6232\u4e4b\u7d0b\u7406\u93c8Mipmap<\/figcaption><\/figure>\n<p>\u7576\u76f8\u6a5f\u9060\u96e2\u6a21\u578b\u6642,\u6a21\u578b\u4e5f\u6703\u8b8a\u5c0f.\u5176\u7d0b\u7406\u6e32\u67d3\u63a1\u6a23\u6642\u6703\u9846\u7c92\u72c0\u5931\u771f.\u89e3\u6c7a\u5931\u771f\u554f\u984c\u95dc\u9375\u5728\u65bc\u8b93\u5c4f\u5e55\u4e2d\u9ad4\u7a4d\u8f03\u5c0f\u7269\u9ad4\u6216\u9060\u96e2\u8996\u9ede\u6642.\u4f7f\u7528\u4f4e\u5206\u8faf\u7387\u300e\u7d0b\u7406Texture\u300f\u5716\u50cf.\u7a31\u503c\u70ba\u7d0b\u7406\u93c8.\u9996\u5148\u7372\u53d6\u7d0b\u7406\u5c3a\u5bf8.\u7136\u5f8c\u5275\u5efa\u6bd4\u5c0f\u5206\u8fa8\u7387\u7d0b\u7406\u5716,\u628a\u5206\u8fa8\u7387\u7e2e\u5c0f\u4e00\u534a.\u91cd\u8907\u9019\u4e00\u904e\u7a0b\u76f4\u5230\u5206\u8fa8\u7387\u70ba1.\u70ba\u4e86\u5728OpenGL ES\u4f7f\u7528\u7d0b\u7406\u93c8,\u9700\u8981\u57f7\u884c\u4ee5\u4e0b\u5169\u6b65<\/p>\n<ol>\n<li>\u5c07\u7e2e\u5c0f\u4fc2\u6578\u904e\u6ffe\u5668\u8a2d\u7f6e\u70baGL_XXX_MIPMAP_XXX\u9019\u88e1\u8a2d\u7f6e\u70ba\u5982\u679c\u4e0d\u4f7f\u7528MIPMAP.\u53ea\u6703\u4f7f\u7528\u9996\u500b\u7d0b\u7406<\/li>\n<li>\u901a\u904e\u7e2e\u5c0f\u7d0b\u7406\u5275\u5efa\u5716\u93c8.\u4e26\u5c07\u5716\u7247\u4e0a\u50b3\u63d0\u4ea4\u7d66OpenGL ES.\u4f5c\u70ba\u7576\u524d\u5716\u5c64.\u5716\u5c64\u5f9e0\u958b\u6b64,0\u5716\u5c64\u70ba\u539f\u59cb\u5716\u5c64,\u7136\u5f8c\u4e0a\u50b3\u5716\u5c64.\u7136\u5f8c\u5c07\u5176\u5bec\u5ea6\u8207\u9ad8\u9664\u4ee52\u4e0d\u65b7\u5275\u5efa\u7e2e\u5c0f\u5716\u5c64\u4e26\u4e0a\u50b3.\u56de\u6536\u4f4d\u5716.\u76f4\u5230\u5bec\u8207\u9ad8\u7b49\u65bc\u96f6.\u6700\u5f8c\u4e00\u5f35\u7d0b\u74061*1\u50cf\u7d20.\u5247\u9000\u51fa\u5faa\u74b0.\u4e26\u4e14\u7d0b\u7406\u93c8\u53ea\u80fd\u7d81\u5b9a\u55ae\u4e00\u7d0b\u7406<\/li>\n<li>\u5c0d\u65bc3D\u6a21\u5f62\u4f7f\u7528\u7d0b\u7406\u93c8mipmap,\u800c\u57282D\u6750\u8cea\u7121\u9700\u61c9\u7528<\/li>\n<li>\u82e5\u555f\u7528mipmap\u6240\u7e6a\u88fd\u7269\u8f03\u5c0f.\u6027\u80fd\u63d0\u5347\u8f03\u660e\u986f.\u56e0\u70baGPU\u53ea\u9700\u5f9e\u5c0f\u5716\u7247\u4e2d\u63d0\u53d6\u7d0b\u7406\u5143\u7d20<\/li>\n<li>\u82e5\u555f\u7528mipmap\u7d0b\u7406\u93c8\u6703\u6bd4\u6c92\u6709\u4f7f\u7528\u591a\u4f54\u752833%\u8a18\u61b6\u9ad4.\u4f46\u53ef\u63db\u4f86\u8996\u89d2\u6548\u679c\u63d0\u5347.\u7279\u5225\u5c0d\u9060\u666f\u7269\u9ad4\u53ef\u4fee\u6b63\u7c92\u72c0\u5931\u771f.<\/li>\n<li>mipmap\u7d0b\u7406\u93c8\u50c5\u5c0d\u6b63\u65b9\u5f62\u7d0b\u7406\u6709\u6548.\u4e26\u4e14\u50c5\u5728OpenGL ES 1.x\u7372\u5f97\u652f\u6301.<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<p><a href=\"https:\/\/www.bookcard.net\/wordpress\/android_game_texture_mapping\/\">\u7d0b\u7406\u4f4d\u5716\u8f09\u5165\u8207\u7d81\u5b9a<\/a>.\u5728\u5176\u57fa\u790e\u52a0\u5165\u7d0b\u7406\u93c8\u4ee3\u78bc<\/p>\n<p>GL10 gl = GRAPHICS.gl;<\/p>\n<p>\u751f\u6210\u7a7a\u7684\u7d0b\u7406\u5c0d\u8c61,\u4e26\u7372\u53d6id<\/p>\n<p>gl.glGenTextures(1, ids,0);<\/p>\n<p>int id = ids[0];<\/p>\n<p>\u8b80\u53d6\u7d0b\u7406\u5716<\/p>\n<p>Bitmap\u00a0 bitmap = <a href=\"https:\/\/www.bookcard.net\/wordpress\/android_game_bitmap_read\/\">BITMAP.Read<\/a>(file_name);<\/p>\n<p>\u7d81\u5b9a\u7d0b\u7406ID<\/p>\n<p>gl.glBindTexture(GL10.GL_TEXTURE_2D, id);<\/p>\n<p>\u8a2d\u7f6e\u7d0b\u7406\u5c6c\u6027,\u7d0b\u7406\u904e\u6ffe\u5668,\u6307\u5b9a\u7e2e\u5c0f\u500d\u6578\u904e\u6ffe\u5668<\/p>\n<p>gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MIN_FILTER, GL10.GL_LINEAR_MIPMAP_NEAREST);<\/p>\n<p>\u6307\u5b9a\u653e\u5927\u500d\u6578\u904e\u6ffe\u5668<\/p>\n<p>gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MAG_FILTER, GL10.GL_LINEAR);<\/p>\n<p>\u7372\u53d6\u7d0b\u7406\u5bec\u5ea6\u8207\u9ad8\u5ea6<\/p>\n<p>int\u00a0\u00a0\u00a0 width = bitmap.getWidth();<\/p>\n<p>int\u00a0\u00a0\u00a0 height = bitmap.getHeight();<\/p>\n<p>\u539f\u59cb\u5716\u5c64\u7d22\u5f15\u70ba0<\/p>\n<p>int level = 0;<\/p>\n<p>while(true) {<\/p>\n<p>\u4e0a\u50b3\u7d0b\u7406<\/p>\n<p>GLUtils.texImage2D(GL10.GL_TEXTURE_2D, level, bitmap, 0);<\/p>\n<p>\u5716\u5c64\u7d22\u5f15\u865f\u52a0\u4e00<\/p>\n<p>++level;<\/p>\n<p>\u8a08\u7b97\u7e2e\u5c0f\u4e00\u534a\u7d0b\u7406\u4f4d\u5716\u5bec\u8207\u9ad8<\/p>\n<p>int newWidth = bitmap.getWidth()\/2;<\/p>\n<p>int newHeight = bitmap.getHeight()\/2;<\/p>\n<p>\u5bec\u8207\u9ad8\u7b49\u65bc\u96f6\u6642\u8df3\u51fa\u5faa\u74b0<\/p>\n<p>if(newWidth == 0)<\/p>\n<p>break;<\/p>\n<p>\u5275\u5efa\u7e2e\u5c0f\u4e00\u534a\u7d0b\u7406\u4f4d\u5716<\/p>\n<p>Bitmap\u00a0 newBitmap = Bitmap.createBitmap(newWidth,newHeight,bitmap.getConfig());<\/p>\n<p>Canvas canvas = new Canvas(newBitmap);<\/p>\n<p>canvas.drawBitmap(bitmap,<\/p>\n<p>new Rect(0,0,bitmap.getWidth(),bitmap.getHeight()),<\/p>\n<p>new Rect(0,0,newWidth,newHeight),<\/p>\n<p>null);<\/p>\n<p>\u56de\u6536\u4f4d\u5716\u8cc7\u6e90<\/p>\n<p>bitmap.recycle();<\/p>\n<p>bitmap = newBitmap;<\/p>\n<p>}<\/p>\n<p>\u53d6\u6d88\u90a6\u5b9a\u7d0b\u7406ID<\/p>\n<p>gl.glBindTexture(GL10.GL_TEXTURE_2D, 0);<\/p>\n<p>\u56de\u6536\u4f4d\u5716\u8cc7\u6e90<\/p>\n<p>bitmap.recycle();<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u7576\u76f8\u6a5f\u9060\u96e2\u6a21\u578b\u6642,\u6a21\u578b\u4e5f\u6703\u8b8a\u5c0f.\u5176\u7d0b\u7406\u6e32\u67d3\u63a1\u6a23\u6642\u6703\u9846\u7c92\u72c0\u5931\u771f.\u89e3\u6c7a\u5931\u771f\u554f\u984c\u95dc\u9375\u5728\u65bc\u8b93\u5c4f\u5e55\u4e2d\u9ad4\u7a4d\u8f03\u5c0f\u7269\u9ad4\u6216\u9060\u96e2\u8996 &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/www.bookcard.net\/wordpress\/android_game_texture_mipmap\/\" class=\"more-link\">\u7e7c\u7e8c\u95b1\u8b80 <span class=\"screen-reader-text\">Android\u904a\u6232\u4e4b\u7d0b\u7406\u93c8Mipmap<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4,62],"tags":[2,50],"class_list":["post-4503","post","type-post","status-publish","format-standard","hentry","category-android","category-opengl","tag-android","tag-opengl","entry"],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/posts\/4503","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/comments?post=4503"}],"version-history":[{"count":1,"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/posts\/4503\/revisions"}],"predecessor-version":[{"id":4505,"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/posts\/4503\/revisions\/4505"}],"wp:attachment":[{"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/media?parent=4503"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/categories?post=4503"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.bookcard.net\/wordpress\/wp-json\/wp\/v2\/tags?post=4503"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}