Initial commit

lib/impact/loader.js

@@ -0,0 +1,101 @@
+ig.module(
+	'impact.loader'
+)
+.requires(
+	'impact.image',
+	'impact.font',
+	'impact.sound'
+)
+.defines(function(){ "use strict";
+
+ig.Loader = ig.Class.extend({
+	resources: [],
+	
+	gameClass: null,
+	status: 0,
+	done: false,
+	
+	_unloaded: [],
+	_drawStatus: 0,
+	_intervalId: 0,
+	_loadCallbackBound: null,
+	
+	
+	init: function( gameClass, resources ) {
+		this.gameClass = gameClass;
+		this.resources = resources;
+		this._loadCallbackBound = this._loadCallback.bind(this);
+		
+		for( var i = 0; i < this.resources.length; i++ ) {
+			this._unloaded.push( this.resources[i].path );
+		}
+	},
+	
+	
+	load: function() {
+		ig.system.clear( '#000' );
+		
+		if( !this.resources.length ) {
+			this.end();
+			return;
+		}
+
+		for( var i = 0; i < this.resources.length; i++ ) {
+			this.loadResource( this.resources[i] );
+		}
+		this._intervalId = setInterval( this.draw.bind(this), 16 );
+	},
+	
+	
+	loadResource: function( res ) {
+		res.load( this._loadCallbackBound );
+	},
+	
+	
+	end: function() {
+		if( this.done ) { return; }
+		
+		this.done = true;
+		clearInterval( this._intervalId );
+		ig.system.setGame( this.gameClass );
+	},
+	
+	
+	draw: function() {
+		this._drawStatus += (this.status - this._drawStatus)/5;
+		var s = ig.system.scale;
+		var w = ig.system.width * 0.6;
+		var h = ig.system.height * 0.1;
+		var x = ig.system.width * 0.5-w/2;
+		var y = ig.system.height * 0.5-h/2;
+		
+		ig.system.context.fillStyle = '#000';
+		ig.system.context.fillRect( 0, 0, 480, 320 );
+		
+		ig.system.context.fillStyle = '#fff';
+		ig.system.context.fillRect( x*s, y*s, w*s, h*s );
+		
+		ig.system.context.fillStyle = '#000';
+		ig.system.context.fillRect( x*s+s, y*s+s, w*s-s-s, h*s-s-s );
+		
+		ig.system.context.fillStyle = '#fff';
+		ig.system.context.fillRect( x*s, y*s, w*s*this._drawStatus, h*s );
+	},
+	
+	
+	_loadCallback: function( path, status ) {
+		if( status ) {
+			this._unloaded.erase( path );
+		}
+		else {
+			throw( 'Failed to load resource: ' + path );
+		}
+		
+		this.status = 1 - (this._unloaded.length / this.resources.length);
+		if( this._unloaded.length == 0 ) { // all done?
+			setTimeout( this.end.bind(this), 250 );
+		}
+	}
+});
+
+});