feat(game/game-loader): parse the BMS

package.json

@@ -76,7 +76,7 @@
   "dependencies": {
     "audio-context": "^0.1.0",
     "bluebird": "^2.9.6",
-    "bms": "^0.2.0",
+    "bms": "^0.5.0",
     "bytes": "^1.0.0",
     "chance": "^0.7.3",
     "co": "^4.3.1",

src/game/game-loader.js

@@ -2,6 +2,7 @@
 import co from 'co'
 import bytes from 'bytes'
 import { basename } from 'path'
+import BMS from 'bms'
 
 import { EventEmitter } from 'events'
 import TaskList         from 'bemuse/task-list'
@@ -30,7 +31,11 @@ export class GameLoader extends EventEmitter {
         }.bind(this)),
         song: co(function*() {
           let buffer = yield download(bms).as('arraybuffer', tasks.bms)
-          return buffer
+          let source = yield readBMS(buffer)
+          let compileResult = BMS.Compiler.compile(source)
+          let chart = compileResult.chart
+          let songInfo = BMS.SongInfo.fromBMSChart(chart)
+          void songInfo
         }.bind(this)),
       }
       yield Promise.all([promises.graphics, promises.song])
@@ -67,4 +72,9 @@ function loadEngine(task) {
   })
 }
 
+function readBMS(buffer) {
+  buffer = new Buffer(new Uint8Array(buffer))
+  return Promise.promisify(BMS.Reader.readAsync)(buffer)
+}
+
 export default GameLoader

src/game/index.js

@@ -6,11 +6,14 @@ import GameLoader from './game-loader'
 export function main() {
   let song = {
         title: 'オリヴィアの幻術',
-        subtitle: [
+        subtitles: [
           '[Tonalite]',
         ],
         artist: '葵',
         genre: 'Sexy Dance',
+        subartists: [
+          'mov:いとう まさき/obj:止ヒ糸',
+        ],
       }
   let loader = new GameLoader()
   let promise = loader.load('/music/aoi_olivia/olivia_SPpp.bml')

src/game/loading-scene/style.scss

@@ -80,6 +80,9 @@
     font-size: 4vmin;
     margin-top: 0.8ex;
   }
+  &--subartist {
+    font-size: 2.5vmin;
+  }
 
 }
 

src/game/loading-scene/view.jade

@@ -8,9 +8,11 @@ mixin section(name)
     .loading-scene-song-info
       .loading-scene-song-info--genre {{song.genre}}
       .loading-scene-song-info--title {{song.title}}
-      +section('song.subtitle')
+      +section('song.subtitles')
         .loading-scene-song-info--subtitle {{.}}
       .loading-scene-song-info--artist {{song.artist}}
+      +section('song.subartists')
+        .loading-scene-song-info--subartist {{.}}
   .loading-scene-progress
     +section('items')
       .loading-scene-progress--item