{"id":45261,"date":"2023-12-08T23:44:39","date_gmt":"2023-03-07T00:04:10","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/45261-2\/"},"modified":"2024-05-04T12:43:55","modified_gmt":"2024-05-04T04:43:55","slug":"45261-2","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/45261-2\/","title":{"rendered":""},"content":{"rendered":"<p>Rust Advent Calendar 2017\u306e1\u65e5\u76ee\u3067\u3059\u3002<br \/>\n\u521d\u65e5\u304b\u3089\u5909\u5316\u7403\u3068\u3044\u3046\u611f\u3058\u3067\u3059\u304c\u3001\u7533\u8fbc\u307f\u6642\u70b9\u3067\u521d\u65e5\u3068\u6700\u7d42\u65e5\u3057\u304b\u7a7a\u3044\u3066\u3044\u306a\u304b\u3063\u305f\u306e\u3067\u3054\u5bb9\u8d66\u304f\u3060\u3055\u3044\u3002<\/p>\n<h2>\u306f\u3058\u3081\u306b<\/h2>\n<p>WebAssembly\u306b\u3088\u308bRust\u3067\u306eWeb\u30d5\u30ed\u30f3\u30c8\u30a8\u30f3\u30c9\u958b\u767a\u306b\u8208\u5473\u304c\u3042\u308a\u3001\u3061\u3087\u3063\u3068\u3060\u3051\u8a18\u4e8b\u3092\u66f8\u3044\u305f\u308a\u3057\u3066\u304d\u307e\u3057\u305f\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Rust\u3067Web\u30d5\u30ed\u30f3\u30c8\u30a8\u30f3\u30c9\u958b\u767a<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">Rust\u3067Fetch API with Emscripten<\/ul>\n<p>\u3064\u3044\u5148\u65e5\u3001Emscripten\u306b\u4f9d\u5b58\u305b\u305a\u306bWebAssembly\u3092\u751f\u6210\u3059\u308bwasm32-unknown-unknown\u3068\u3044\u3046\u30bf\u30fc\u30b2\u30c3\u30c8\u304c\u516c\u5f0f\u306b\u8ffd\u52a0\u3055\u308c\u305f\u308a\u3082\u3057\u3066(\u53c2\u8003:wasm32-unknown-unknown landed &amp; enabled)\u3001Web\u30d5\u30ed\u30f3\u30c8\u30a8\u30f3\u30c9\u958b\u767a\u3067Rust\u3068WebAssembly\u304c\u5b9f\u7528\u7684\u306b\u4f7f\u308f\u308c\u308b\u65e5\u304c\u5f90\u3005\u306b\u8fd1\u3065\u3044\u3066\u3044\u308b\u3088\u3046\u306b\u611f\u3058\u307e\u3059\u3002<\/p>\n<p>WebAssembly\u304c\u76db\u308a\u4e0a\u304c\u3063\u3066\u3044\u308b\u3068\u3053\u308d\u3067\u3059\u304c\u3001Web\u30d6\u30e9\u30a6\u30b6\u4e0a\u3067\u306e\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u30b0\u30e9\u30d5\u30a3\u30c3\u30af\u30b9\u3068\u3057\u3066\u306fWebGL2\u3068\u3044\u3046\u65b0\u3057\u3044\u898f\u683c\u306e\u5b9f\u88c5\u304c\u9032\u3093\u3067\u3044\u307e\u3059\u3002<br \/>\n\u672c\u7a3f\u306e\u57f7\u7b46\u6642\u70b9\u3067\u306f\u3001Google Chrome\u3068Firefox\u3001Safari(\u6709\u52b9\u5316\u8a2d\u5b9a\u304c\u5fc5\u8981)\u3067WebGL2\u304c\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u3044\u307e\u3059\u3002<br \/>\nWebGL2\u306e\u6982\u8981\u306b\u3064\u3044\u3066\u306f\u4ee5\u4e0b\u306e\u8a18\u4e8b\u306a\u3069\u3067\u307e\u3068\u3081\u3089\u308c\u3066\u3044\u307e\u3059\u3002<br \/>\n* WebGL 2.0\u306e\u6982\u8981<br \/>\n* \u306a\u306b\u304c\u5909\u308f\u308b\u306e WebGL 2.0 &#8211; \u65b0\u3057\u3044\u6b21\u4e16\u4ee3 WebGL \u5b9f\u88c5\u306b\u3064\u3044\u3066\u77e5\u308d\u3046<\/p>\n<p>\u3055\u3066\u672c\u984c\u3067\u3059\u304c\u3001\u4eca\u5e74\u306e\u6625\u306bRust(WebAssembly)\u3068WebGL2\u3092\u4f7f\u3063\u305f\u30c7\u30e2( https:\/\/likr.github.io\/rust-webgl2-example\/ )\u3092\u516c\u958b\u3057\u3066\u3044\u307e\u3057\u305f\u3002<br \/>\n\u30ab\u30e9\u30d5\u30eb\u306a\u7acb\u65b9\u4f53\u304c\u30af\u30eb\u30af\u30eb\u56de\u308b\u3068\u3044\u3046\u7c21\u5358\u306a\u30b5\u30f3\u30d7\u30eb\u3067\u3059\u3002<br \/>\n\u3053\u308c\u306e\u89e3\u8aac\u3092\u3059\u308b\u3068\u8a00\u3063\u305f\u307e\u307e\u5e74\u672b\u306b\u306a\u3063\u3066\u3057\u307e\u3063\u305f\u306e\u3067\u3001\u3053\u306e\u6a5f\u4f1a\u306b\u66f8\u3044\u3066\u304a\u3053\u3046\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n<h2>Rust+Emscripten\u3067WebGL<\/h2>\n<p>\u306f\u3058\u3081\u306b\u3001\u3069\u306e\u3088\u3046\u306b\u3057\u3066Rust\u3067WebGL2\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u66f8\u3044\u3066\u3044\u304f\u306e\u304b\u306e\u65b9\u91dd\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002<br \/>\nEmscripten\u3067C++\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u3092JavaScript\u306b\u30b3\u30f3\u30d1\u30a4\u30eb\u3059\u308b\u5834\u5408\u3001OpenGL ES\u3067\u8a18\u8ff0\u3057\u305f\u30b3\u30fc\u30c9\u3092WebGL\u306b\u5909\u63db\u3057\u3066\u3001\u305d\u306e\u307e\u307eWeb\u30d6\u30e9\u30a6\u30b6\u3067\u52d5\u304b\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<br \/>\nRust\u3067\u3082\u3001asmjs-unknown-emscripten\u3042\u308b\u3044\u306fwasm32-unknown-emscripten\u306e\u30bf\u30fc\u30b2\u30c3\u30c8\u3067\u3042\u308c\u3070\u3001Emscripten\u306e\u63d0\u4f9b\u3059\u308bAPI\u3092\u4f7f\u3063\u3066\u540c\u69d8\u306e\u3053\u3068\u304c\u53ef\u80fd\u3067\u3059\u3002<\/p>\n<p>gleam\u306fRust\u7528\u306eOpenGL\u30d0\u30a4\u30f3\u30c7\u30a3\u30f3\u30b0\u3067\u3059\u3002<br \/>\ngleam\u3092\u4f7f\u3063\u3066OpenGL ES\u5411\u3051\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u66f8\u3044\u3066\u304a\u3051\u3070\u3001Emscripten\u304c\u305d\u308c\u3089\u306e\u30b3\u30fc\u30c9\u3092WebGL\u306b\u5909\u63db\u3057\u3066\u304f\u308c\u307e\u3059\u3002<\/p>\n<p>OpenGL(ES)\u81ea\u4f53\u306f\u4f4e\u30ec\u30a4\u30e4\u30fc\u6a5f\u80fd\u306e\u63d0\u4f9b\u3057\u304b\u3057\u306a\u3044\u306e\u3067\u3001\u3088\u308a\u697d\u306bCG\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3092\u884c\u3046\u305f\u3081\u306bGLFW\u306a\u3069\u306e\u30e9\u30a4\u30d6\u30e9\u30ea\u304c\u3088\u304f\u5229\u7528\u3055\u308c\u307e\u3059\u3002<br \/>\nRust\u3067\u306f\u3001GLFW\u3092\u610f\u8b58\u3057\u3066\u305d\u308c\u3089\u306e\u6a5f\u80fd\u3092Pure Rust\u3067\u5b9f\u88c5\u3057\u305fglutin\u3068\u3044\u3046crate\u304c\u3042\u308a\u307e\u3059\u3002<br \/>\nglutin\u306fEmscripten\u74b0\u5883\u3082\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u3066\u3001Emscripten\u306eAPI\u3092\u610f\u8b58\u3059\u308b\u3053\u3068\u306a\u304fCG\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3092\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<br \/>\n\u305f\u3060\u3057\u3001\u73fe\u6642\u70b9\u3067glutin\u306f\u3001WebGL1\u306e\u307f\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u308b\u306e\u3067\u3001WebGL2\u306e\u6a5f\u80fd\u3092\u4f7f\u3046\u305f\u3081\u306b\u306f\u4ed6\u306e\u624b\u6bb5\u3092\u8003\u3048\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>Emscripten\u81ea\u4f53\u306fWebGL2\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u3066\u3044\u308b\u306e\u3067\u3001\u305d\u306eAPI\u3092\u76f4\u63a5\u4f7f\u3063\u3066\u3084\u308c\u3070Rust\u3067\u3082WebGL2\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<br \/>\nRust\u3067Emscripten\u306eAPI\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u305f\u3081\u306ecrate\u304c\u3044\u304f\u3064\u304b\u516c\u958b\u3055\u308c\u3066\u3044\u308b\u306e\u3067\u3001\u305d\u306e\u4e00\u3064\u3067\u3042\u308bemscripten-sys\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n<p>\u4ee5\u4e0b\u3067\u306f\u30b3\u30fc\u30c9\u306e\u4e00\u90e8\u306b\u3064\u3044\u3066\u5177\u4f53\u7684\u306b\u8aac\u660e\u3057\u3066\u3044\u304d\u307e\u3059\u3002<br \/>\n\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u306e\u5168\u4f53\u306f https:\/\/github.com\/likr\/rust-webgl2-example \u3067\u516c\u958b\u3057\u3066\u3044\u307e\u3059\u3002<br \/>\nRust\u3067WebAssembly\u3092\u751f\u6210\u3057\u3066\u5b9f\u884c\u3059\u308b\u65b9\u6cd5\u306a\u3069\u306f\u3001\u305f\u304f\u3055\u3093\u89e3\u8aac\u304c\u3042\u308b\u3068\u601d\u3046\u306e\u3067\u305d\u308c\u3089\u3092\u3054\u53c2\u7167\u304f\u3060\u3055\u3044\u3002<\/p>\n<h2>WebGL2\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u306e\u4f5c\u6210<\/h2>\n<p>\u306f\u3058\u3081\u306b\u3001WebGL2\u306e\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002<br \/>\nJavaScript\u3060\u3063\u305f\u3089\u3001canvas.getContext(&#8216;webgl2&#8217;) \u306e\u3088\u3046\u306b\u66f8\u304f\u3068\u3053\u308d\u3067\u3059\u3002<\/p>\n<p>Emscripten\u3067\u306f\u3001emscripten_webgl_create_context\u306e\u5f15\u6570\u3067\u3042\u308bEmscriptenWebGLContextAttributes\u69cb\u9020\u4f53\u306emajorVersion\u306b2\u3092\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u3067WebGL2\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u3092\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002<br \/>\nWebGL2\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u3092\u53d6\u5f97\u3059\u308b\u30b3\u30fc\u30c9\u306e\u5168\u4f53\u3092\u4ee5\u4e0b\u306b\u793a\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">unsafe<\/span> <span class=\"k\">fn<\/span> <span class=\"nf\">get_gl_context<\/span><span class=\"p\">()<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"n\">GlPtr<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"k\">mut<\/span> <span class=\"n\">attributes<\/span><span class=\"p\">:<\/span> <span class=\"n\">EmscriptenWebGLContextAttributes<\/span> <span class=\"o\">=<\/span> <span class=\"nn\">std<\/span><span class=\"p\">::<\/span><span class=\"nn\">mem<\/span><span class=\"p\">::<\/span><span class=\"nf\">uninitialized<\/span><span class=\"p\">();<\/span>\r\n    <span class=\"nf\">emscripten_webgl_init_context_attributes<\/span><span class=\"p\">(<\/span><span class=\"o\">&amp;<\/span><span class=\"k\">mut<\/span> <span class=\"n\">attributes<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"n\">attributes<\/span><span class=\"py\">.majorVersion<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">2<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">handle<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">emscripten_webgl_create_context<\/span><span class=\"p\">(<\/span><span class=\"nn\">std<\/span><span class=\"p\">::<\/span><span class=\"nn\">ptr<\/span><span class=\"p\">::<\/span><span class=\"nf\">null<\/span><span class=\"p\">(),<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">attributes<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"nf\">emscripten_webgl_make_context_current<\/span><span class=\"p\">(<\/span><span class=\"n\">handle<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"nn\">gl<\/span><span class=\"p\">::<\/span><span class=\"nn\">GlesFns<\/span><span class=\"p\">::<\/span><span class=\"nf\">load_with<\/span><span class=\"p\">(|<\/span><span class=\"n\">addr<\/span><span class=\"p\">|<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">let<\/span> <span class=\"n\">addr<\/span> <span class=\"o\">=<\/span> <span class=\"nn\">std<\/span><span class=\"p\">::<\/span><span class=\"nn\">ffi<\/span><span class=\"p\">::<\/span><span class=\"nn\">CString<\/span><span class=\"p\">::<\/span><span class=\"nf\">new<\/span><span class=\"p\">(<\/span><span class=\"n\">addr<\/span><span class=\"p\">)<\/span><span class=\"nf\">.unwrap<\/span><span class=\"p\">();<\/span>\r\n        <span class=\"nf\">emscripten_GetProcAddress<\/span><span class=\"p\">(<\/span><span class=\"n\">addr<\/span><span class=\"nf\">.into_raw<\/span><span class=\"p\">()<\/span> <span class=\"k\">as<\/span> <span class=\"o\">*<\/span><span class=\"k\">const<\/span> <span class=\"mi\">_<\/span><span class=\"p\">)<\/span> <span class=\"k\">as<\/span> <span class=\"o\">*<\/span><span class=\"k\">const<\/span> <span class=\"mi\">_<\/span>\r\n    <span class=\"p\">})<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u306f\u3058\u3081\u306b\u3001EmscriptenWebGLContextAttributes\u69cb\u9020\u4f53\u3092\u4f5c\u6210\u3057\u307e\u3059\u3002<br \/>\n\u305d\u3057\u3066\u3001emscripten_webgl_init_context_attributes\u306b\u3088\u3063\u3066\u30c7\u30d5\u30a9\u30eb\u30c8\u5024\u306b\u521d\u671f\u5316\u3057\u3001majorVersion\u306e\u5024\u30922\u306b\u5909\u66f4\u3057\u307e\u3059\u3002<br \/>\n\u6b21\u306b\u3001emscripten_webgl_create_context\u3068emscripten_webgl_make_context_current\u3092\u547c\u3073\u51fa\u3057\u3001\u6700\u5f8c\u306bload_with\u306e\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u3067emscripten_GetProcAddress\u3092\u547c\u3073\u51fa\u3057\u307e\u3059\u3002<br \/>\nemscripten_GetProcAddress\u306f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u5316\u3055\u308c\u3066\u3044\u306a\u3044\u95a2\u6570\u306a\u306e\u3067\u3001\u4eca\u5f8c\u3082\u3053\u306e\u901a\u308a\u3067\u826f\u3044\u304b\u306f\u4e0d\u660e\u77ad\u306a\u3068\u3053\u308d\u3067\u3059\u3002<br \/>\n\u3053\u306e\u8fba\u308a\u306e\u521d\u671f\u5316\u51e6\u7406\u306fglutin\u3092\u53c2\u8003\u306b\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>gl\u3092\u53d6\u5f97\u3057\u3066\u3057\u307e\u3048\u3070\u3001\u4f8b\u3048\u3070\u4ee5\u4e0b\u306e\u3088\u3046\u306bOpenGL ES\u306e\u6a5f\u80fd\u3092\u547c\u3073\u51fa\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">fn<\/span> <span class=\"nf\">load_shader<\/span><span class=\"p\">(<\/span><span class=\"n\">gl<\/span><span class=\"p\">:<\/span> <span class=\"o\">&amp;<\/span><span class=\"n\">GlPtr<\/span><span class=\"p\">,<\/span> <span class=\"n\">shader_type<\/span><span class=\"p\">:<\/span> <span class=\"n\">GLenum<\/span><span class=\"p\">,<\/span> <span class=\"n\">source<\/span><span class=\"p\">:<\/span> <span class=\"o\">&amp;<\/span><span class=\"p\">[<\/span><span class=\"o\">&amp;<\/span><span class=\"p\">[<\/span><span class=\"nb\">u8<\/span><span class=\"p\">]])<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"nb\">Option<\/span><span class=\"o\">&lt;<\/span><span class=\"n\">GLuint<\/span><span class=\"o\">&gt;<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">shader<\/span> <span class=\"o\">=<\/span> <span class=\"n\">gl<\/span><span class=\"nf\">.create_shader<\/span><span class=\"p\">(<\/span><span class=\"n\">shader_type<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"k\">if<\/span> <span class=\"n\">shader<\/span> <span class=\"o\">==<\/span> <span class=\"mi\">0<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"nb\">None<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"p\">}<\/span>\r\n    <span class=\"n\">gl<\/span><span class=\"nf\">.shader_source<\/span><span class=\"p\">(<\/span><span class=\"n\">shader<\/span><span class=\"p\">,<\/span> <span class=\"n\">source<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"n\">gl<\/span><span class=\"nf\">.compile_shader<\/span><span class=\"p\">(<\/span><span class=\"n\">shader<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"k\">let<\/span> <span class=\"n\">compiled<\/span> <span class=\"o\">=<\/span> <span class=\"n\">gl<\/span><span class=\"nf\">.get_shader_iv<\/span><span class=\"p\">(<\/span><span class=\"n\">shader<\/span><span class=\"p\">,<\/span> <span class=\"nn\">gl<\/span><span class=\"p\">::<\/span><span class=\"n\">COMPILE_STATUS<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"k\">if<\/span> <span class=\"n\">compiled<\/span> <span class=\"o\">==<\/span> <span class=\"mi\">0<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">let<\/span> <span class=\"k\">log<\/span> <span class=\"o\">=<\/span> <span class=\"n\">gl<\/span><span class=\"nf\">.get_shader_info_log<\/span><span class=\"p\">(<\/span><span class=\"n\">shader<\/span><span class=\"p\">);<\/span>\r\n        <span class=\"nd\">println!<\/span><span class=\"p\">(<\/span><span class=\"s\">\"{}\"<\/span><span class=\"p\">,<\/span> <span class=\"k\">log<\/span><span class=\"p\">);<\/span>\r\n        <span class=\"n\">gl<\/span><span class=\"nf\">.delete_shader<\/span><span class=\"p\">(<\/span><span class=\"n\">shader<\/span><span class=\"p\">);<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"nb\">None<\/span><span class=\"p\">;<\/span>\r\n    <span class=\"p\">}<\/span>\r\n    <span class=\"nf\">Some<\/span><span class=\"p\">(<\/span><span class=\"n\">shader<\/span><span class=\"p\">)<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>OpenGL API\u306e\u30a8\u30e9\u30fc\u51e6\u7406\u3092Option\u3084Result\u3067\u6574\u7406\u3057\u3066\u3084\u308b\u3053\u3068\u3082\u3067\u304d\u305d\u3046\u3067\u3059\u306d\u3002<\/p>\n<p>OpenGL ES\u306e\u6a5f\u80fd\u306b\u95a2\u3057\u3066\u306f\u3001Rust + WebAssembly\u306b\u56fa\u6709\u306e\u8a71\u3067\u306f\u306a\u3044\u306e\u3067\u3001\u4eca\u56de\u306f\u8a73\u7d30\u3092\u7701\u304d\u307e\u3059\u3002<br \/>\ngleam\u306e\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u306a\u3069\u3092\u3054\u53c2\u7167\u304f\u3060\u3055\u3044\u3002<\/p>\n<p>WebGL2\u3068\u3057\u3066\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u3092\u4f5c\u6210\u3057\u305f\u3053\u3068\u3067\u3001GLSL ES 3.0\u3067\u30b7\u30a7\u30fc\u30c0\u30fc\u3092\u66f8\u304f\u3053\u3068\u304c\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<h2>\u30d5\u30ec\u30fc\u30e0\u6bce\u306e\u51e6\u7406<\/h2>\n<p>JavaScript\u3067\u306eWebGL\u3092\u3084\u3063\u305f\u3053\u3068\u306e\u3042\u308b\u4eba\u306a\u3089\u3001requestAnimationFrame\u3092\u4f7f\u3063\u305f\u51e6\u7406\u306f\u884c\u306a\u3063\u3066\u3044\u308b\u304b\u3068\u601d\u3044\u307e\u3059\u3002<br \/>\nrequestAnimationFrame\u3092\u4f7f\u3046\u3053\u3068\u3067\u300160FPS\u3067\u306e\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3084\u753b\u9762\u304c\u975e\u30a2\u30af\u30c6\u30a3\u30d6\u306e\u6642\u306b\u51e6\u7406\u3092\u6b62\u3081\u308b\u3068\u3044\u3063\u305f\u3053\u3068\u304c\u7c21\u5358\u306b\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>Emscripten\u306e\u74b0\u5883\u3067\u306f\u3001emscripten_set_main_loop\u95a2\u6570\u306b\u3088\u3063\u3066\u540c\u69d8\u306e\u51e6\u7406\u304c\u53ef\u80fd\u3067\u3059\u3002<br \/>\nemscripten_set_main_loop\u306eC++\u3067\u306e\u578b\u5b9a\u7fa9\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">typedef<\/span> <span class=\"nf\">void<\/span> <span class=\"p\">(<\/span><span class=\"o\">*<\/span><span class=\"n\">em_callback_func<\/span><span class=\"p\">)(<\/span><span class=\"kt\">void<\/span><span class=\"p\">);<\/span>\r\n<span class=\"kt\">void<\/span> <span class=\"nf\">emscripten_set_main_loop<\/span><span class=\"p\">(<\/span><span class=\"n\">em_callback_func<\/span> <span class=\"n\">func<\/span><span class=\"p\">,<\/span> <span class=\"kt\">int<\/span> <span class=\"n\">fps<\/span><span class=\"p\">,<\/span> <span class=\"kt\">int<\/span> <span class=\"n\">simulate_infinite_loop<\/span><span class=\"p\">);<\/span>\r\n<\/code><\/pre>\n<p>\u5185\u90e8\u7684\u306b\u306f\u3001\u7b2c\u4e8c\u5f15\u6570\u306b0\u3092\u4e0e\u3048\u308b\u3068requestAnimationFrame\u304c\u30011\u4ee5\u4e0a\u306e\u5024\u3092\u4e0e\u3048\u308b\u3068setTimeout\u304c\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002<br \/>\n\u7b2c\u4e00\u5f15\u6570\u306f\u30d5\u30ec\u30fc\u30e0\u6bce\u306b\u547c\u3073\u51fa\u3055\u308c\u308b\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u3067\u3059\u3002<br \/>\n\u3055\u3066\u3001\u578b\u5b9a\u7fa9\u306b\u3088\u308b\u3068\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u306f\u5f15\u6570\u3092\u53d6\u3089\u306a\u3044\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002<br \/>\nWebGL\u3067\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3092\u3059\u308b\u5834\u5408\u306a\u3069\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u72b6\u614b\u3092\u4fdd\u6301\u3057\u3066\u304a\u304d\u3001\u30d5\u30ec\u30fc\u30e0\u6bce\u306e\u51e6\u7406\u3067\u305d\u306e\u72b6\u614b\u3092\u53cd\u6620\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u306e\u3067\u3001\u3053\u308c\u3067\u306f\u56f0\u308a\u307e\u3059\u3002<br \/>\n\u4eca\u56de\u306e\u30b5\u30f3\u30d7\u30eb\u3067\u306f\u3001\u30d5\u30ec\u30fc\u30e0\u6bce\u306b\u7acb\u65b9\u4f53\u306e\u56de\u8ee2\u89d2\u5ea6\u3092\u66f4\u65b0\u3057\u3066\u63cf\u753b\u3092\u884c\u306a\u3063\u3066\u3044\u308b\u306e\u304c\u305d\u308c\u306b\u8a72\u5f53\u3057\u307e\u3059\u3002<br \/>\n\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u3092\u4f7f\u3046\u3068\u3044\u3046\u30a2\u30d7\u30ed\u30fc\u30c1\u3082\u3042\u308a\u307e\u3059\u304c\u3001\u3055\u3059\u304c\u306bRust\u3092\u4f7f\u3063\u3066\u3044\u308b\u306e\u306bstatic mut\u3067\u30b0\u30ed\u30fc\u30d0\u30eb\u5909\u6570\u3092\u5b89\u6613\u306b\u4f5c\u308a\u305f\u304f\u306f\u306a\u3044\u3067\u3059\u3088\u306d\u3002<\/p>\n<p>emscripten_set_main_loop\u306e\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u306b\u5f15\u6570\u3092\u3068\u308b\u30d0\u30fc\u30b8\u30e7\u30f3\u3068\u3057\u3066\u3001emscripten_set_main_loop_arg\u304c\u3042\u308a\u307e\u3059\u3002<br \/>\n\u578b\u5b9a\u7fa9\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">typedef<\/span> <span class=\"nf\">void<\/span> <span class=\"p\">(<\/span><span class=\"o\">*<\/span><span class=\"n\">em_arg_callback_func<\/span><span class=\"p\">)(<\/span><span class=\"kt\">void<\/span><span class=\"o\">*<\/span><span class=\"p\">);<\/span>\r\n<span class=\"kt\">void<\/span> <span class=\"nf\">emscripten_set_main_loop_arg<\/span><span class=\"p\">(<\/span><span class=\"n\">em_arg_callback_func<\/span> <span class=\"n\">func<\/span><span class=\"p\">,<\/span> <span class=\"kt\">void<\/span> <span class=\"o\">*<\/span><span class=\"n\">arg<\/span><span class=\"p\">,<\/span> <span class=\"kt\">int<\/span> <span class=\"n\">fps<\/span><span class=\"p\">,<\/span> <span class=\"kt\">int<\/span> <span class=\"n\">simulate_infinite_loop<\/span><span class=\"p\">);<\/span>\r\n<\/code><\/pre>\n<p>\u3053\u3061\u3089\u306f\u3001\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u306e\u5f15\u6570\u3092void*\u3068\u3057\u3066\u4e0e\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<br \/>\n\u3064\u307e\u308a\u3001Rust\u3067\u3082emscripten_set_main_loop_arg\u306b\u30b3\u30fc\u30eb\u30d0\u30c3\u30af\u95a2\u6570\u3068\u5f15\u6570\u3092\u4e0e\u3048\u3066\u3084\u308c\u3070\u826f\u3044\u308f\u3051\u3067\u3059\u3002<br \/>\n\u3053\u308c\u3089\u3092emscripten-sys\u3067\u63d0\u4f9b\u3055\u308c\u308bAPI\u306b\u57fa\u3065\u3044\u3066\u5b9f\u88c5\u3057\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<br \/>\n\u4eca\u56de\u306f\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306e\u72b6\u614b\u3092App\u3068\u3044\u3046\u69cb\u9020\u4f53\u3067\u4fdd\u6301\u3059\u308b\u3053\u3068\u306b\u3057\u307e\u3059\u3002<br \/>\nContext\u306b\u306fgl\u3092\u6301\u305f\u305b\u3066\u304a\u304f\u3053\u3068\u3067\u3001\u30d5\u30ec\u30fc\u30e0\u6bce\u306b\u518d\u63cf\u753b\u51e6\u7406\u3092\u884c\u3046\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<br \/>\n\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u6982\u5f62\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">type<\/span> <span class=\"n\">GlPtr<\/span> <span class=\"o\">=<\/span> <span class=\"nn\">std<\/span><span class=\"p\">::<\/span><span class=\"nn\">rc<\/span><span class=\"p\">::<\/span><span class=\"nb\">Rc<\/span><span class=\"o\">&lt;<\/span><span class=\"nn\">gl<\/span><span class=\"p\">::<\/span><span class=\"n\">Gl<\/span><span class=\"o\">&gt;<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"nd\">#[repr(C)]<\/span>\r\n<span class=\"k\">struct<\/span> <span class=\"n\">App<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"n\">gl<\/span><span class=\"p\">:<\/span> <span class=\"n\">GlPtr<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"c\">\/\/ \u7701\u7565<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">impl<\/span> <span class=\"n\">App<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">fn<\/span> <span class=\"nf\">new<\/span><span class=\"p\">(<\/span><span class=\"n\">gl<\/span><span class=\"p\">:<\/span> <span class=\"n\">GlPtr<\/span><span class=\"p\">)<\/span> <span class=\"k\">-&gt;<\/span> <span class=\"n\">App<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"c\">\/\/ \u521d\u671f\u5316\u51e6\u7406<\/span>\r\n        <span class=\"n\">App<\/span> <span class=\"p\">{<\/span>\r\n            <span class=\"n\">gl<\/span><span class=\"p\">:<\/span> <span class=\"n\">gl<\/span><span class=\"p\">,<\/span>\r\n        <span class=\"p\">}<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">extern<\/span> <span class=\"k\">fn<\/span> <span class=\"nf\">step<\/span><span class=\"p\">(<\/span><span class=\"n\">app<\/span><span class=\"p\">:<\/span> <span class=\"o\">*<\/span><span class=\"k\">mut<\/span> <span class=\"nn\">std<\/span><span class=\"p\">::<\/span><span class=\"nn\">os<\/span><span class=\"p\">::<\/span><span class=\"nn\">raw<\/span><span class=\"p\">::<\/span><span class=\"nb\">c_void<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">unsafe<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">let<\/span> <span class=\"k\">mut<\/span> <span class=\"n\">app<\/span> <span class=\"o\">=<\/span> <span class=\"o\">&amp;<\/span><span class=\"k\">mut<\/span> <span class=\"o\">*<\/span><span class=\"p\">(<\/span><span class=\"n\">app<\/span> <span class=\"k\">as<\/span> <span class=\"o\">*<\/span><span class=\"k\">mut<\/span> <span class=\"n\">App<\/span><span class=\"p\">);<\/span>\r\n        <span class=\"c\">\/\/ app\u3092\u4f7f\u3063\u305f\u51e6\u7406<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">fn<\/span> <span class=\"nf\">main<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">unsafe<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">let<\/span> <span class=\"n\">gl<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">get_gl_context<\/span><span class=\"p\">();<\/span>\r\n        <span class=\"k\">let<\/span> <span class=\"k\">mut<\/span> <span class=\"n\">app<\/span> <span class=\"o\">=<\/span> <span class=\"nn\">App<\/span><span class=\"p\">::<\/span><span class=\"nf\">new<\/span><span class=\"p\">(<\/span><span class=\"n\">gl<\/span><span class=\"p\">);<\/span>\r\n        <span class=\"k\">let<\/span> <span class=\"n\">ptr<\/span> <span class=\"o\">=<\/span> <span class=\"o\">&amp;<\/span><span class=\"k\">mut<\/span> <span class=\"n\">app<\/span> <span class=\"k\">as<\/span> <span class=\"o\">*<\/span><span class=\"k\">mut<\/span> <span class=\"mi\">_<\/span> <span class=\"k\">as<\/span> <span class=\"o\">*<\/span><span class=\"k\">mut<\/span> <span class=\"nn\">std<\/span><span class=\"p\">::<\/span><span class=\"nn\">os<\/span><span class=\"p\">::<\/span><span class=\"nn\">raw<\/span><span class=\"p\">::<\/span><span class=\"nb\">c_void<\/span><span class=\"p\">;<\/span>\r\n        <span class=\"nf\">emscripten_set_main_loop_arg<\/span><span class=\"p\">(<\/span><span class=\"nf\">Some<\/span><span class=\"p\">(<\/span><span class=\"n\">step<\/span><span class=\"p\">),<\/span> <span class=\"n\">ptr<\/span><span class=\"p\">,<\/span> <span class=\"mi\">0<\/span><span class=\"p\">,<\/span> <span class=\"mi\">1<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>Emscripten\u306eAPI\u306b\u6e21\u3059step\u95a2\u6570\u3068App\u69cb\u9020\u4f53\u306f\u305d\u308c\u305e\u308cextern\u3068#[repr(C)]\u3092\u3064\u3051\u308b\u3053\u3068\u3067FFI\u306b\u5bfe\u5fdc\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u3042\u3068\u306f\u3001App\u3092\u62e1\u5f35\u3057\u3066\u3044\u3051\u3070\u7c21\u5358\u306aCG\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u306f\u3067\u304d\u305d\u3046\u3067\u3059\u306d\u3002<\/p>\n<h2>\u304a\u308f\u308a\u306b<\/h2>\n<p>\u3055\u3066\u3001\u4eca\u56de\u306fRust\u3067WebGL2\u3068\u8a00\u3044\u3064\u3064\u3082\u3001Emscripten\u306eAPI\u3092\u4f7f\u3063\u305fRust\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3068\u3044\u3046\u611f\u3058\u3067\u3057\u305f\u3002<br \/>\n\u305f\u3060\u3057\u3001Rust\u3067WebGL2\u3092\u3084\u308b\u305f\u3081\u306b\u5fc5\u8981\u306aEmscript\u306eAPI\u306f\u3001WebGL\u30b3\u30f3\u30c6\u30ad\u30b9\u30c8\u306e\u4f5c\u6210\u3068\u753b\u9762\u30eb\u30fc\u30d7\u51e6\u7406\u306e\u90e8\u5206\u3060\u3051\u3067\u3057\u305f\u3002<br \/>\n\u9006\u306b\u8a00\u3048\u3070\u3001\u3053\u308c\u3089\u306e\u51e6\u7406\u3055\u3048\u96a0\u853d\u3059\u308c\u3070\u3001\u30cd\u30a4\u30c6\u30a3\u30d6\u306eOpenGL ES\u3068\u5168\u304f\u540c\u3058\u30b3\u30fc\u30c9\u3067WebGL\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u66f8\u304f\u3053\u3068\u3082\u53ef\u80fd\u3067\u3059\u3002<br \/>\n\u5b9f\u969b\u306bglutin\u306f\u305d\u306e\u3088\u3046\u306b\u5b9f\u88c5\u3055\u308c\u3066\u3044\u307e\u3059\u306d\u3002<\/p>\n<p>\u307e\u3060\u307e\u3060\u3053\u306e\u8fba\u308a\u306fRust\u3001C++\u3001JavaScript\u306e\u4e16\u754c\u3092\u305d\u308c\u305e\u308c\u7406\u89e3\u3057\u306a\u3051\u308c\u3070\u96e3\u3057\u3044\u3068\u3053\u308d\u304c\u3042\u308a\u307e\u3059\u3002<br \/>\n\u3067\u3059\u304c\u3001\u4e00\u5ea6\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u306e\u3088\u3046\u306a\u3082\u306e\u304c\u78ba\u7acb\u3055\u308c\u3066\u3057\u307e\u3048\u3070\u3001Rust\u306e\u30d1\u30ef\u30fc\u3067\u52b9\u7387\u826f\u3044WebGL\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u304c\u53ef\u80fd\u306b\u306a\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002<br \/>\n\u6765\u5e74\u3082Rust\u3068Web\u306e\u767a\u5c55\u304b\u3089\u76ee\u304c\u96e2\u305b\u307e\u305b\u3093\u306d\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Rust Advent Calendar 2017\u306e1\u65e5\u76ee\u3067\u3059\u3002 \u521d\u65e5\u304b\u3089\u5909\u5316\u7403\u3068\u3044\u3046\u611f\u3058\u3067\u3059\u304c\u3001\u7533\u8fbc\u307f\u6642\u70b9\u3067 [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-45261","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>- Blog - Silicon Cloud<\/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.silicloud.com\/zh\/blog\/45261-2\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:description\" content=\"Rust Advent Calendar 2017\u306e1\u65e5\u76ee\u3067\u3059\u3002 \u521d\u65e5\u304b\u3089\u5909\u5316\u7403\u3068\u3044\u3046\u611f\u3058\u3067\u3059\u304c\u3001\u7533\u8fbc\u307f\u6642\u70b9\u3067 [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/zh\/blog\/45261-2\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:published_time\" content=\"2023-03-07T00:04:10+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-05-04T04:43:55+00:00\" \/>\n<meta name=\"author\" content=\"\u6e05, \u626c\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"\u6e05, \u626c\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 \u5206\" \/>\n<script type=\"application\/ld+json\" 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