{"id":4569,"date":"2013-03-05T18:16:28","date_gmt":"2013-03-05T09:16:28","guid":{"rendered":"http:\/\/www.webtech.co.jp\/blog\/?p=4569"},"modified":"2020-06-16T09:35:47","modified_gmt":"2020-06-16T00:35:47","slug":"post-4569","status":"publish","type":"post","link":"https:\/\/www.webtech.co.jp\/blog\/optpix_labs\/format\/4569\/","title":{"rendered":"DXTC(S3TC)\u5727\u7e2e\u306e\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3068\u306f\uff1f\uff5e\u5f8c\u7de8\uff5e"},"content":{"rendered":"<p>R&amp;D\u90e8 \u4e0a\u7530\u3067\u3059\u3002<\/p>\n<p>DXTC(S3TC)\u5727\u7e2e\u306e\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u89e3\u8aac\u3001\u5f8c\u7de8\u3067\u3059\u3002<a href=\"https:\/\/www.webtech.co.jp\/blog\/optpix_labs\/format\/4013\/\">\u524d\u56de<\/a>\u306e\u30a8\u30f3\u30c8\u30ea\u30fc\u3067\u306f\u300cDXTC\u3068\u306f\u4f55\u304b\uff1f\u300d\u300c\u3069\u3093\u306a\u3068\u3053\u308d\u3067\u4f7f\u308f\u308c\u3066\u3044\u308b\u306e\u304b\uff1f\u300d\u3068\u3044\u3063\u305f\u57fa\u672c\u7684\u306a\u89e3\u8aac\u3068\u3001DXT1\u306e\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u3054\u8aac\u660e\u3057\u307e\u3057\u305f\u3002\u4eca\u56de\u306fDXT2\uff5eDXT5\u306e\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<p><!--more--><\/p>\n<h2>DXT2\uff5e5\u3063\u3066\u4f55\uff1f<\/h2>\n<p>DXTC(S3TC)\u5727\u7e2e\u306b\u306f\u3001DXT1\uff5e5\u306e5\u7a2e\u985e\u306e\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u304c\u5b58\u5728\u3057\u307e\u3059\u3002<a href=\"https:\/\/www.webtech.co.jp\/blog\/optpix_labs\/format\/4013\/\">\u524d\u56de<\/a>\u89e3\u8aac\u3057\u305f\u306e\u306fDXT1\u306e\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3067\u3059\u3002<\/p>\n<h2>\u4f55\u304c\u9055\u3046\u306e\uff1f<\/h2>\n<p>DXT1\u306f\u30a2\u30eb\u30d5\u30a1(\u03b1,alpha)\u30c1\u30e3\u30cd\u30eb\u4ed8\u304d\u753b\u50cf(32bit\u00a0ARGB\u30ab\u30e9\u30fc)\u306b\u5bfe\u5fdc\u3057\u3066\u3044\u307e\u305b\u3093\u3067\u3057\u305f(\u5b8c\u5168\u900f\u660e\u8272\uff1d\u629c\u304d\u8272\u306e\u307f\u5bfe\u5fdc)\u3002\u3053\u308c\u306b\u5bfe\u3057\u3066\u3001DXT2\uff5e5\u306f\u30a2\u30eb\u30d5\u30a1\u30c1\u30e3\u30f3\u30cd\u30eb\u4ed8\u304d\u753b\u50cf\u306b\u5bfe\u5fdc\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\u305d\u306e\u4ee3\u308f\u308a\u3001DXT1\u304c24bit\u00a0RGB\u30ab\u30e9\u30fc\u753b\u50cf\u3092\u5727\u7e2e\u3059\u308b\u3068\u5727\u7e2e\u7387\u304c1\/6 (4&#215;4\u30d6\u30ed\u30c3\u30af=16\u30d4\u30af\u30bb\u30eb\u3042\u305f\u308a8\u30d0\u30a4\u30c8)\u3068\u306a\u308b\u306e\u306b\u5bfe\u3057\u3066\u3001DXT2\uff5eDXT5\u306f32bit ARGB\u30ab\u30e9\u30fc\u753b\u50cf\u3092\u5727\u7e2e\u3059\u308b\u3068\u5727\u7e2e\u7387\u304c1\/4 (4&#215;4\u30d6\u30ed\u30c3\u30af=16\u30d4\u30af\u30bb\u30eb\u3042\u305f\u308a16\u30d0\u30a4\u30c8)\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<h2>DXT2\uff5e5\u306e\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0<\/h2>\n<h3>DXT2\uff5e5\u3067\u5171\u901a\u3059\u308b\u57fa\u672c\u539f\u7406<\/h3>\n<p>\u307e\u305a\u30014\u00d74\u30d4\u30af\u30bb\u30eb\u30921\u30d6\u30ed\u30c3\u30af\u3068\u3057\u3066\u6271\u3046\u3053\u3068\u306f\u3001DXT1\uff5e5\u306e\u5168\u3066\u3067\u540c\u3058\u3067\u3059\u3002<\/p>\n<p>\u3055\u3066\u3001\u6539\u3081\u3066\u8aac\u660e\u3059\u308b\u307e\u3067\u3082\u306a\u3044\u3053\u3068\u3067\u3059\u304c\u300132bit ARGB\u30ab\u30e9\u30fc\u753b\u50cf\u3068\u3044\u3046\u306e\u306f\u300124bit RGB\u30ab\u30e9\u30fc\u753b\u50cf\u306b8bit\u306e\u30a2\u30eb\u30d5\u30a1\u6210\u5206\u3092\u52a0\u3048\u305f\u753b\u50cf\u3067\u3059\u3002<\/p>\n<div id=\"attachment_4611\" style=\"width: 426px\" class=\"wp-caption aligncenter\"><a title=\"\" href=\"https:\/\/www.webtech.co.jp\/blog\/wp-content\/uploads\/2013\/02\/ARGBimage_full.png\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-4611\" class=\"wp-image-4611 size-full\" src=\"https:\/\/www.webtech.co.jp\/blog\/wp-content\/uploads\/2013\/02\/ARGBimage_half.png\" alt=\"ARGBimage_half\" width=\"416\" height=\"161\" \/><\/a><p id=\"caption-attachment-4611\" class=\"wp-caption-text\">32bit ARGB\u30ab\u30e9\u30fc\u753b\u50cf\u306fRGB\u6210\u5206\u3068\u30a2\u30eb\u30d5\u30a1\u6210\u5206\u3067\u3067\u304d\u3066\u3044\u308b<\/p><\/div>\n<p>\u307e\u305a\u300124bit RGB\u30ab\u30e9\u30fc\u753b\u50cf\u90e8\u5206\u306b\u3064\u3044\u3066\u306f\u3001DXT1\u3068\u540c\u3058\u5727\u7e2e\u3059\u308b\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u4f7f\u7528\u3057\u307e\u3059\u3002<\/p>\n<div id=\"attachment_4609\" style=\"width: 324px\" class=\"wp-caption aligncenter\"><a title=\"\" href=\"https:\/\/www.webtech.co.jp\/blog\/wp-content\/uploads\/2013\/02\/DXT1_full.png\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-4609\" class=\"wp-image-4609 size-full\" src=\"https:\/\/www.webtech.co.jp\/blog\/wp-content\/uploads\/2013\/02\/DXT1_half.png\" alt=\"DXT1_half\" width=\"314\" height=\"136\" srcset=\"https:\/\/www.webtech.co.jp\/blog\/wp-content\/uploads\/2013\/02\/DXT1_half.png 314w, https:\/\/www.webtech.co.jp\/blog\/wp-content\/uploads\/2013\/02\/DXT1_half-300x129.png 300w\" sizes=\"auto, (max-width: 314px) 100vw, 314px\" \/><\/a><p id=\"caption-attachment-4609\" class=\"wp-caption-text\">DXT1\u306724bit RGB\u30ab\u30e9\u30fc\u753b\u50cf\u3092\u5727\u7e2e\u3067\u304d\u308b<\/p><\/div>\n<p>32bit ARGB\u30ab\u30e9\u30fc\u753b\u50cf\u306e\u5727\u7e2e\u3067\u306f\u3001RGB\u6210\u5206\u306fDXT1\u3068\u540c\u3058\u624b\u6cd5\u3067\u5727\u7e2e\u3057\u3001\u30a2\u30eb\u30d5\u30a1\u6210\u5206\u306e\u307f\u30921\u30d6\u30ed\u30c3\u30af64bit \u3068\u3057\u3066\u5727\u7e2e\u3057\u307e\u3059\u3002<\/p>\n<div id=\"attachment_4613\" style=\"width: 428px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.webtech.co.jp\/blog\/wp-content\/uploads\/2013\/02\/DXT2to5_full.png\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-4613\" class=\"wp-image-4613 size-full\" src=\"https:\/\/www.webtech.co.jp\/blog\/wp-content\/uploads\/2013\/02\/DXT2to5_half.png\" alt=\"DXT2to5_half\" width=\"418\" height=\"337\" srcset=\"https:\/\/www.webtech.co.jp\/blog\/wp-content\/uploads\/2013\/02\/DXT2to5_half.png 418w, https:\/\/www.webtech.co.jp\/blog\/wp-content\/uploads\/2013\/02\/DXT2to5_half-300x241.png 300w\" sizes=\"auto, (max-width: 418px) 100vw, 418px\" \/><\/a><p id=\"caption-attachment-4613\" class=\"wp-caption-text\">DXT2\uff5e5\u3067\u306f\u3001RGB\u6210\u5206\u306fDXT1\u3067\u5727\u7e2e\u3057\u3001\u30a2\u30eb\u30d5\u30a1\u6210\u5206\u306f\u5225\u306b\u5727\u7e2e\u3059\u308b<\/p><\/div>\n<p>\u3053\u306e\u30a2\u30eb\u30d5\u30a1\u6210\u5206\u306e\u5727\u7e2e\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u304c4\u7a2e\u985e\u3042\u308a\u3001\u305d\u308c\u3089\u304cDXT2\uff5e5\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<h3>DXT3\u306e\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0<\/h3>\n<p>\u307e\u305aDXT2\u306f\u98db\u3070\u3057\u3066\u3001\u5148\u306bDXT3\u306e\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u304b\u3089\u89e3\u8aac\u3057\u307e\u3059(\u305d\u306e\u65b9\u304c\u90fd\u5408\u304c\u826f\u3044\u306e\u3067\u2026)\u3002<\/p>\n<p>\u4e00\u3064\u524d\u306e\u56f3\u3067\u3001DXT2\uff5e5\u3067\u306f\u30a2\u30eb\u30d5\u30a1\u6210\u5206\u30921\u30d6\u30ed\u30c3\u30af\u3042\u305f\u308a64bit\u306b\u5727\u7e2e\u3059\u308b\u3001\u3068\u66f8\u304d\u307e\u3057\u305f\u3002<strong>DXT3<\/strong>\u3067\u306f\u3053\u306e<strong>64bit\u3092\u5358\u7d14\u306b\u30a2\u30eb\u30d5\u30a1\u6210\u5206\u306e\u8868\u73fe\u306b\u4f7f\u3044\u307e\u3059\u3002<\/strong>\u307e\u305a\u5727\u7e2e\u524d\u3068\u5727\u7e2e\u5f8c\u306b\u3064\u3044\u3066\u30011\u30d4\u30af\u30bb\u30eb\u3042\u305f\u308a\u306e\u30d3\u30c3\u30c8\u6570\u3092\u6bd4\u3079\u308b\u3068\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<div id=\"attachment_4619\" style=\"width: 385px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.webtech.co.jp\/blog\/wp-content\/uploads\/2013\/02\/DXT3_alpha_full.png\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-4619\" class=\"wp-image-4619 size-full\" src=\"https:\/\/www.webtech.co.jp\/blog\/wp-content\/uploads\/2013\/02\/DXT3_alpha_half.png\" alt=\"DXT3_alpha_half\" width=\"375\" height=\"89\" srcset=\"https:\/\/www.webtech.co.jp\/blog\/wp-content\/uploads\/2013\/02\/DXT3_alpha_half.png 375w, https:\/\/www.webtech.co.jp\/blog\/wp-content\/uploads\/2013\/02\/DXT3_alpha_half-300x71.png 300w\" sizes=\"auto, (max-width: 375px) 100vw, 375px\" \/><\/a><p id=\"caption-attachment-4619\" class=\"wp-caption-text\">DXT3\u3067\u306e1\u30d4\u30af\u30bb\u30eb\u3042\u305f\u308a\u306e\u968e\u8abf\u6570\u306f1\/16\u306b\u306a\u308b<\/p><\/div>\n<p>\u5727\u7e2e\u524d\u5f8c\u30671\u30d4\u30af\u30bb\u30eb\u3042\u305f\u308a\u306e\u30d3\u30c3\u30c8\u6570\u304c\u534a\u5206\u306b\u306a\u308b\u306e\u306b\u5bfe\u3057\u3001\u305d\u306e\u30d3\u30c3\u30c8\u6570\u3067\u8868\u73fe\u3067\u304d\u308b\u968e\u8abf\u6570\u306f1\/16\u306b\u306a\u308a\u307e\u3059\u3002\u8868\u73fe\u3067\u304d\u308b\u968e\u8abf\u6570\u304c256\u968e\u8abf\u304b\u308916\u968e\u8abf\u306b\u306a\u308b\u3001\u3068\u3044\u3046\u3053\u3068\u3092\u30b0\u30e9\u30d5\u306b\u3057\u3066\u307f\u308b\u3068\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<div id=\"attachment_4623\" style=\"width: 411px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.webtech.co.jp\/blog\/wp-content\/uploads\/2013\/02\/DXT3_graph_full.png\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-4623\" class=\"wp-image-4623 size-full\" src=\"https:\/\/www.webtech.co.jp\/blog\/wp-content\/uploads\/2013\/02\/DXT3_graph_half.png\" alt=\"DXT3_graph_half\" width=\"401\" height=\"191\" srcset=\"https:\/\/www.webtech.co.jp\/blog\/wp-content\/uploads\/2013\/02\/DXT3_graph_half.png 401w, https:\/\/www.webtech.co.jp\/blog\/wp-content\/uploads\/2013\/02\/DXT3_graph_half-300x142.png 300w\" sizes=\"auto, (max-width: 401px) 100vw, 401px\" \/><\/a><p id=\"caption-attachment-4623\" class=\"wp-caption-text\">256\u968e\u8abf(\u5727\u7e2e\u524d)\u306816\u968e\u8abf(\u5727\u7e2e\u5f8c)\u306e\u6bd4\u8f03<\/p><\/div>\n<p>\u30b0\u30e9\u30d5\u306b\u3059\u308b\u3068\u8868\u73fe\u529b\u304c\u5927\u5e45\u306b\u843d\u3061\u3066\u3044\u308b\u306e\u304c\u826f\u304f\u5206\u304b\u308a\u307e\u3059\u306d\u3002<\/p>\n<p>DXT3\u306e\u5b9f\u969b\u306e\u51e6\u7406\u3068\u3057\u3066\u306f\u3001\u5727\u7e2e\u524d\u306e\u30a2\u30eb\u30d5\u30a1\u5024\u304c0\uff5e8\u306a\u3089\u5727\u7e2e\u5f8c\u306f0\u30019\uff5e25\u306a\u308917\u300126\uff5e42\u306a\u308934\u3001\u2026\u3068\u3044\u3046\u3088\u3046\u306b\u30a2\u30eb\u30d5\u30a1\u5024\u3092\u7f6e\u304d\u63db\u3048\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<div id=\"attachment_4635\" style=\"width: 377px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.webtech.co.jp\/blog\/wp-content\/uploads\/2013\/02\/DXT3_example_full.png\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-4635\" class=\"wp-image-4635 size-full\" src=\"https:\/\/www.webtech.co.jp\/blog\/wp-content\/uploads\/2013\/02\/DXT3_example_half.png\" alt=\"DXT3_example_half\" width=\"367\" height=\"129\" srcset=\"https:\/\/www.webtech.co.jp\/blog\/wp-content\/uploads\/2013\/02\/DXT3_example_half.png 367w, https:\/\/www.webtech.co.jp\/blog\/wp-content\/uploads\/2013\/02\/DXT3_example_half-300x105.png 300w\" sizes=\"auto, (max-width: 367px) 100vw, 367px\" \/><\/a><p id=\"caption-attachment-4635\" class=\"wp-caption-text\">DXT3\u3067\u30a2\u30eb\u30d5\u30a1\u6210\u5206\u3092\u5727\u7e2e\u3059\u308b\u3068\u3053\u3046\u306a\u308b<\/p><\/div>\n<p>\u4e0a\u306e\u56f3\u3092\u898b\u308b\u3068\u308f\u304b\u308b\u3088\u3046\u306b\u3001DXT3\u306e\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3067\u306f\u30a2\u30eb\u30d5\u30a1\u5024\u306e\u7d30\u304b\u3044\u5909\u5316\u306f\u5727\u7e2e\u5f8c\u306b\u53cd\u6620\u3055\u308c\u305a\u3001<strong>\u30a2\u30eb\u30d5\u30a1\u5024\u304c\u6ed1\u3089\u304b\u306b\u5909\u5316\u3057\u3066\u3044\u304f\u3088\u3046\u306a\u753b\u50cf\u3092DXT3\u3067\u5727\u7e2e\u3059\u308b\u3068\u3001\u52a3\u5316\u304c\u6fc0\u3057\u304f\u306a\u3063\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/strong><\/p>\n<h3>DXT5\u306e\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0<\/h3>\n<p>\u4eca\u5ea6\u306fDXT4\u3092\u98db\u3070\u3057\u3066DXT5\u306e\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u89e3\u8aac\u3057\u307e\u3059\u3002<\/p>\n<p>DXT5\u3067\u306fDXT3\u306e\u6b20\u70b9\u3092\u514b\u670d\u3059\u308b\u3088\u3046\u306b\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u304c\u4fee\u6b63\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u307e\u305a\u3001DXT1\u3068\u540c\u3058\u3088\u3046\u306b<strong>\u4ee3\u8868\u7684\u306a8bit\u30a2\u30eb\u30d5\u30a1\u5024\u3092\u4e8c\u3064<\/strong>\u6c7a\u3081\u3001\u305d\u308c\u3089\u304b\u3089<strong>\u88dc\u9593\u3057\u305f\u30a2\u30eb\u30d5\u30a1\u5024\u3092<\/strong>\u4f5c\u308a\u3001\u5408\u8a088\u500b\u306e\u30a2\u30eb\u30d5\u30a1\u5024\u3092\u8868\u73fe\u3057\u307e\u3059\u3002<\/p>\n<div id=\"attachment_4626\" style=\"width: 443px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.webtech.co.jp\/blog\/wp-content\/uploads\/2013\/03\/DXT5_alpha_full.png\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-4626\" class=\"wp-image-4626 size-full\" style=\"width: 433px; height: 316px;\" src=\"https:\/\/www.webtech.co.jp\/blog\/wp-content\/uploads\/2013\/02\/DXT5_alpha_half.png\" alt=\"DXT5_alpha_half\" width=\"433\" height=\"239\" srcset=\"https:\/\/www.webtech.co.jp\/blog\/wp-content\/uploads\/2013\/02\/DXT5_alpha_half.png 433w, https:\/\/www.webtech.co.jp\/blog\/wp-content\/uploads\/2013\/02\/DXT5_alpha_half-300x165.png 300w\" sizes=\"auto, (max-width: 433px) 100vw, 433px\" \/><\/a><p id=\"caption-attachment-4626\" class=\"wp-caption-text\">DXTC5\u3067\u306f\u30a2\u30eb\u30d5\u30a1\u5024\u30922\u500b\u53d6\u308a\u51fa\u3057\u3001\u305d\u308c\u3089\u304b\u3089\u88dc\u9593\u30a2\u30eb\u30d5\u30a1\u5024\u3092\u4f5c\u308b<\/p><\/div>\n<p>\u307e\u305f\u3001\u3053\u3053\u3067\u3082DXT1\u3068\u540c\u69d8\u306b\u300c\u4ee3\u8868\u30a2\u30eb\u30d5\u30a1\u5024\u4e8c\u3064\u306e\u5927\u5c0f\u95a2\u4fc2\u300d\u306b\u3088\u3063\u3066\u30a2\u30eb\u30d5\u30a1\u5024\u306e\u8868\u73fe\u65b9\u6cd5\u304c\u7570\u306a\u308b\u70b9\u306b\u6ce8\u76ee\u3057\u3066\u304f\u3060\u3055\u3044\u3002<br \/>\n\u5177\u4f53\u7684\u306b\u306f\u3001\u4e0a\u306e\u56f3\u3067\u793a\u3057\u305f\u3088\u3046\u306b\u3001\u30a2\u30eb\u30d5\u30a1\u50248\u500b\u306e\u5185\u5bb9\u306f<\/p>\n<ul>\n<li>\u4ee3\u8868\u30a2\u30eb\u30d5\u30a1\u5024\u4e8c\u3064\u306e\u9593\u30928\u968e\u8abf\u3067\u8868\u73fe\u3059\u308b<\/li>\n<li>\u4ee3\u8868\u30a2\u30eb\u30d5\u30a1\u5024\u4e8c\u3064\u306e\u9593\u30926\u968e\u8abf\u3067\u8868\u73fe\u3057\u3001\u66f4\u306b\u300c\u5b8c\u5168\u900f\u660e(0)\u300d\u300c\u5b8c\u5168\u4e0d\u900f\u660e(255)\u300d\u306e\u4e8c\u3064\u306e\u5024\u3092\u6301\u3064<\/li>\n<\/ul>\n<p>\u306e\u3044\u305a\u308c\u304b\u306b\u306a\u308a\u307e\u3059\u3002<br \/>\n\u5f8c\u8005\u306f\u3001\u534a\u900f\u660e\u3092\u4f7f\u3063\u305f\u6587\u5b57\u3084\u30a2\u30a4\u30b3\u30f3\u3067\u3001\u5468\u56f2\u3092\u5b8c\u5168\u900f\u660e\u306b\u3057\u3066\u3044\u308b\u3088\u3046\u306a\u5834\u5408\u306b\u6709\u7528\u3067\u3059\u3002<\/p>\n<p>\u305d\u3057\u3066\u3053\u308c\u30898\u500b\u306e\u30a2\u30eb\u30d5\u30a1\u5024\u306b\u3064\u3044\u3066\u3001\u30d6\u30ed\u30c3\u30af\u5185\u306e\u5404\u30d4\u30af\u30bb\u30eb\u306b\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u4ed8\u3051\u307e\u3059\u3002<br \/>\n\u4eca\u56de\u306f8\u500b\u306e\u5024\u304c\u3042\u308b\u306e\u3067\u3001\u5404\u30d4\u30af\u30bb\u30eb3bit\u4f7f\u3044\u307e\u3059\u3002\u3053\u3046\u3059\u308b\u3053\u3068\u3067\u300164bit\u306b\u5727\u7e2e\u3067\u304d\u307e\u3059\u3002<\/p>\n<div id=\"attachment_4628\" style=\"width: 315px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.webtech.co.jp\/blog\/wp-content\/uploads\/2013\/02\/DXT5_bit_full.png\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-4628\" class=\"wp-image-4628 size-full\" src=\"https:\/\/www.webtech.co.jp\/blog\/wp-content\/uploads\/2013\/02\/DXT5_bit_half.png\" alt=\"DXT5_bit_half\" width=\"305\" height=\"164\" srcset=\"https:\/\/www.webtech.co.jp\/blog\/wp-content\/uploads\/2013\/02\/DXT5_bit_half.png 305w, https:\/\/www.webtech.co.jp\/blog\/wp-content\/uploads\/2013\/02\/DXT5_bit_half-300x161.png 300w\" sizes=\"auto, (max-width: 305px) 100vw, 305px\" \/><\/a><p id=\"caption-attachment-4628\" class=\"wp-caption-text\">DXT5\u5727\u7e2e\u5f8c\u306e\u30a2\u30eb\u30d5\u30a1\u6210\u5206\u306f\u30012\u500b\u306e\u30a2\u30eb\u30d5\u30a1\u5024\u30683bit\u306e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306b\u306a\u308b<\/p><\/div>\n<p>\u3053\u306e\u3088\u3046\u306b\u88dc\u9593\u3057\u305f\u30a2\u30eb\u30d5\u30a1\u5024\u3092\u7528\u3044\u308b\u3053\u3068\u3067\u3001<strong>DXT3\u3088\u308a\u3082\u5727\u7e2e\u5f8c\u306e\u30a2\u30eb\u30d5\u30a1\u5024\u306e\u8868\u73fe\u529b\u3092\u5411\u4e0a<\/strong>\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<div id=\"attachment_4630\" style=\"width: 390px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.webtech.co.jp\/blog\/wp-content\/uploads\/2013\/02\/DXT5_graph_full.png\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-4630\" class=\"wp-image-4630 size-full\" src=\"https:\/\/www.webtech.co.jp\/blog\/wp-content\/uploads\/2013\/02\/DXT5_graph_half.png\" alt=\"DXT5_graph_half\" width=\"380\" height=\"198\" srcset=\"https:\/\/www.webtech.co.jp\/blog\/wp-content\/uploads\/2013\/02\/DXT5_graph_half.png 380w, https:\/\/www.webtech.co.jp\/blog\/wp-content\/uploads\/2013\/02\/DXT5_graph_half-300x156.png 300w\" sizes=\"auto, (max-width: 380px) 100vw, 380px\" \/><\/a><p id=\"caption-attachment-4630\" class=\"wp-caption-text\">DXT5\u3067\u306f256\u968e\u8abf\u3092\u4efb\u610f\u306e\u7bc4\u56f2\u30678\u968e\u8abf\u306b\u3059\u308b<\/p><\/div>\n<p>\u305f\u3060\u3057\u3001\u4e0a\u56f3\u3067\u793a\u3057\u305f\u3088\u3046\u306b<strong>\u30a2\u30eb\u30d5\u30a1\u5024\u306e\u7bc4\u56f2\u304c\u5e83\u304f\u306a\u308b\u3068\u968e\u8abf\u8868\u73fe\u529b\u304c\u4e0b\u304c\u3063\u3066\u3057\u307e\u3046<\/strong>\u306e\u3067\u3001\u4f7f\u7528\u3059\u308b\u5834\u9762\u3092\u9078\u3076\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\u30a2\u30eb\u30d5\u30a1\u5024\u306e\u7bc4\u56f2\u304c0\uff5e255\u3068\u3044\u3046\u4e00\u756a\u6975\u7aef\u306a\u5834\u5408\u3067\u306f\u3001DXT3\u3088\u308a\u3082DXT5\u306e\u307b\u3046\u304c\u968e\u8abf\u8868\u73fe\u304c\u52a3\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<h3>DXT2\u3068DXT4\u306e\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0<\/h3>\n<p>\u98db\u3070\u3057\u3066\u3044\u305fDXT2\u3068DXT4\u306b\u3064\u3044\u3066\u3067\u3059\u304c\u3001\u57fa\u672c\u7684\u306a\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306fDXT2\u304cDXT3\u3068\u3001DXT4\u304cDXT5\u3068\u540c\u3058\u3067\u3059\u3002\u9055\u3046\u70b9\u306f\u3001<strong>DXT2\u3068DXT4\u3067\u306fRGB\u5024\u306b\u30a2\u30eb\u30d5\u30a1\u5024\u304c\u4e88\u3081\u4e57\u7b97\u3055\u308c\u3066\u683c\u7d0d\u3055\u308c\u3066\u3044\u308b<\/strong>\u3053\u3068\u3067\u3059\u3002\u3053\u308c\u3092<strong>\u4e57\u7b97\u6e08\u307f\u30a2\u30eb\u30d5\u30a1<\/strong>\u3068\u8a00\u3044\u307e\u3059\u3002<strong>\u4e57\u7b97\u6e08\u307f\u30a2\u30eb\u30d5\u30a1<\/strong>\u306b\u3064\u3044\u3066\u306f\u30013D\u63cf\u753b\u306e\u9818\u57df\u306e\u8a71\u984c\u306b\u306a\u308a\u307e\u3059\u306e\u3067\u3001\u8208\u5473\u306e\u3042\u308b\u65b9\u306f<a href=\"tps:\/\/www.google.co.jp\/?gws_rd=ssl#hl=ja&amp;q=\u4e57\u7b97\u6e08\u307f\u30a2\u30eb\u30d5\u30a1\">\u300c\u4e57\u7b97\u6e08\u307f\u30a2\u30eb\u30d5\u30a1\u300d\u3067\u691c\u7d22<\/a>\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h2>DXTC 1\uff5e5 \u7279\u5fb4\u306e\u307e\u3068\u3081<\/h2>\n<table class=\"tableStyle1\" border=\"2\" width=\"706\" cellspacing=\"1\" cellpadding=\"1\" align=\"left\">\n<caption><strong>DXTC 1\uff5e5\u306e\u7279\u5fb4<\/strong><\/caption>\n<thead>\n<tr>\n<th style=\"width: 45px;\" scope=\"row\">\u540d\u524d<\/th>\n<th style=\"width: 200px;\" scope=\"col\">RGB\u30c1\u30e3\u30cd\u30eb<\/th>\n<th style=\"width: 288px;\" scope=\"col\">\u30a2\u30eb\u30d5\u30a1\u30c1\u30e3\u30f3\u30cd\u30eb<\/th>\n<th style=\"width: 57px;\" scope=\"col\">\u5727\u7e2e\u7387<\/th>\n<th style=\"width: 86px;\" scope=\"col\">\u5099\u8003<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<th style=\"width: 45px;\" scope=\"row\"><span style=\"font-weight: bold; text-align: center;\">DXT1<\/span><\/th>\n<td style=\"width: 200px;\">\u4ee3\u88682\u5024+\u88dc\u95932\u5024<\/td>\n<td style=\"width: 288px;\">\u306a\u3057<\/td>\n<td style=\"width: 57px;\">1\/6<\/td>\n<td style=\"width: 86px;\">\u5143\u753b\u50cf\u03b1\u306a\u3057<\/td>\n<\/tr>\n<tr>\n<th style=\"width: 45px;\" scope=\"row\">DXT1<\/th>\n<td style=\"width: 200px;\">\u4ee3\u88682\u5024+\u88dc\u95931\u5024<\/td>\n<td style=\"width: 288px;\">1bit<\/td>\n<td style=\"width: 57px;\">1\/8<\/td>\n<td style=\"width: 86px;\">\u5143\u753b\u50cf\u03b1\u3042\u308a<\/td>\n<\/tr>\n<tr>\n<th style=\"width: 45px;\" scope=\"row\">DXT2<\/th>\n<td style=\"width: 200px;\">\u4ee3\u88682\u5024+\u88dc\u95932\u5024<\/td>\n<td style=\"width: 288px;\">4bit<\/td>\n<td style=\"width: 57px;\">1\/4<\/td>\n<td style=\"width: 86px;\">\u4e57\u7b97\u6e08\u03b1<\/td>\n<\/tr>\n<tr>\n<th style=\"width: 45px;\" scope=\"row\">DXT3<\/th>\n<td style=\"width: 200px;\">\u4ee3\u88682\u5024+\u88dc\u95932\u5024<\/td>\n<td style=\"width: 288px;\">4bit<\/td>\n<td style=\"width: 57px;\">1\/4<\/td>\n<td style=\"width: 86px;\"><\/td>\n<\/tr>\n<tr>\n<th style=\"width: 45px;\" scope=\"row\">DXT4<\/th>\n<td style=\"width: 200px;\">\u4ee3\u88682\u5024+\u88dc\u95932\u5024<\/td>\n<td style=\"width: 288px;\">\u4ee3\u88682\u5024+\u88dc\u95936\u5024 \u00a0\u307e\u305f\u306f<br \/>\n0+\u4ee3\u88682\u5024+\u88dc\u95934\u5024+255<\/td>\n<td style=\"width: 57px;\">1\/4<\/td>\n<td style=\"width: 86px;\">\u4e57\u7b97\u6e08\u03b1<\/td>\n<\/tr>\n<tr>\n<th style=\"width: 45px;\" scope=\"row\">DXT5<\/th>\n<td style=\"width: 200px;\">\u4ee3\u88682\u5024+\u88dc\u95932\u5024<\/td>\n<td style=\"width: 288px;\">\u4ee3\u88682\u5024+\u88dc\u95936\u5024 \u00a0\u307e\u305f\u306f<br \/>\n0+\u4ee3\u88682\u5024+\u88dc\u95934\u5024+255<\/td>\n<td style=\"width: 57px;\">1\/4<\/td>\n<td style=\"width: 86px;\"><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"<p>R&amp;D\u90e8 \u4e0a\u7530\u3067\u3059\u3002 DXTC(S3TC)\u5727\u7e2e\u306e\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u89e3\u8aac\u3001\u5f8c\u7de8\u3067\u3059\u3002\u524d\u56de\u306e\u30a8\u30f3\u30c8\u30ea\u30fc\u3067\u306f\u300cDXTC\u3068\u306f\u4f55\u304b\uff1f\u300d\u300c\u3069\u3093\u306a\u3068\u3053\u308d\u3067\u4f7f\u308f\u308c\u3066\u3044\u308b\u306e\u304b\uff1f\u300d\u3068\u3044\u3063\u305f\u57fa\u672c\u7684\u306a\u89e3\u8aac\u3068\u3001DXT1\u306e\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u3054\u8aac\u660e\u3057\u307e &hellip; <a href=\"https:\/\/www.webtech.co.jp\/blog\/optpix_labs\/format\/4569\/\">\u7d9a\u304d\u3092\u8aad\u3080 <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":26,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[325],"tags":[364,381,608,363,267],"class_list":["post-4569","post","type-post","status-publish","format-standard","hentry","category-format","tag-364","tag-381","tag-608","tag-363","tag-267"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>DXTC(S3TC)\u5727\u7e2e\u306e\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3068\u306f\uff1f\uff5e\u5f8c\u7de8\uff5e - OPTPiX Labs Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.webtech.co.jp\/blog\/optpix_labs\/format\/4569\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"DXTC(S3TC)\u5727\u7e2e\u306e\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3068\u306f\uff1f\uff5e\u5f8c\u7de8\uff5e - OPTPiX Labs Blog\" \/>\n<meta property=\"og:description\" content=\"R&amp;D\u90e8 \u4e0a\u7530\u3067\u3059\u3002 DXTC(S3TC)\u5727\u7e2e\u306e\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u89e3\u8aac\u3001\u5f8c\u7de8\u3067\u3059\u3002\u524d\u56de\u306e\u30a8\u30f3\u30c8\u30ea\u30fc\u3067\u306f\u300cDXTC\u3068\u306f\u4f55\u304b\uff1f\u300d\u300c\u3069\u3093\u306a\u3068\u3053\u308d\u3067\u4f7f\u308f\u308c\u3066\u3044\u308b\u306e\u304b\uff1f\u300d\u3068\u3044\u3063\u305f\u57fa\u672c\u7684\u306a\u89e3\u8aac\u3068\u3001DXT1\u306e\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u3054\u8aac\u660e\u3057\u307e &hellip; \u7d9a\u304d\u3092\u8aad\u3080 &rarr;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.webtech.co.jp\/blog\/optpix_labs\/format\/4569\/\" \/>\n<meta property=\"og:site_name\" content=\"OPTPiX Labs Blog\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/OPTPiX\" \/>\n<meta property=\"article:published_time\" content=\"2013-03-05T09:16:28+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2020-06-16T00:35:47+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.webtech.co.jp\/blog\/wp-content\/uploads\/2013\/02\/ARGBimage_half.png\" \/>\n<meta name=\"author\" content=\"cri_shima\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@optpix\" \/>\n<meta name=\"twitter:site\" content=\"@optpix\" \/>\n<meta name=\"twitter:label1\" content=\"\u57f7\u7b46\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"cri_shima\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u63a8\u5b9a\u8aad\u307f\u53d6\u308a\u6642\u9593\" \/>\n\t<meta name=\"twitter:data2\" content=\"1\u5206\" \/>\n<script type=\"application\/ld+json\" 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