From 26a62c0cffe5d1dc63003f5df284d479e8354215 Mon Sep 17 00:00:00 2001
From: MightyPork <ondra@ondrovo.com>
Date: Sun, 27 Oct 2013 18:30:33 +0100
Subject: [PATCH] Initial

---
 js/lores-animator.js | 119 ++++++
 js/lores-base.js     | 847 +++++++++++++++++++++++++++++++++++++++++++
 js/lores-sprites.js  | 199 ++++++++++
 3 files changed, 1165 insertions(+)
 create mode 100644 js/lores-animator.js
 create mode 100644 js/lores-base.js
 create mode 100644 js/lores-sprites.js

diff --git a/js/lores-animator.js b/js/lores-animator.js
new file mode 100644
index 0000000..18328ad
--- /dev/null
+++ b/js/lores-animator.js
@@ -0,0 +1,119 @@
+// Lores.js - animator module
+// (c) Ondrej Hruska 2013
+// www.ondrovo.com
+
+// MIT license
+
+
+/* Animation manager */
+function LoresAnimator(opts) {
+	this.initAnim = opts.init || function(){};
+	this.animFrame = opts.frame || function(){};
+	this.fps = opts.fps || 40;
+	
+	this.started = false;
+	this.paused = false;
+	this.halted = false;
+};
+
+
+LoresAnimator.prototype.start = function() {	
+	this.initAnim();
+	
+	this.started = true;
+	this.paused = false;
+	this.halted = false;
+	
+    this._requestFrame();
+};
+
+
+LoresAnimator.prototype.stop = function() {
+	var self = this;
+	
+	this.started = false;
+	this.halted = true;
+};
+
+
+LoresAnimator.prototype.isPaused = function() {
+	return this.started && this.paused && !this.halted;
+};
+
+
+LoresAnimator.prototype.isRunning = function() {
+	return this.started && !this.paused && !this.halted;
+};
+
+
+LoresAnimator.prototype.toggle = function() {
+	var self = this;
+	
+	if(!this.started || this.halted) {
+		throw "Invalid state for toggle()";
+	}
+	
+	if(this.paused) {
+		this.resume();
+	} else {
+		this.pause();
+	}
+};
+
+
+LoresAnimator.prototype.pause = function() {
+	var self = this;
+	
+	if(!this.started || this.halted) {
+		throw "Invalid state for pause()";
+	}
+	
+	this.paused = true;
+	this.halted = false;
+};
+
+
+LoresAnimator.prototype.setFps = function(fps) {
+	
+	this.fps = fps;
+};
+
+
+LoresAnimator.prototype.resume = function() {
+	var self = this;
+	
+	if(!this.started || !this.paused || this.halted) {
+		throw "Invalid state for resume()";
+	}
+	
+	this.paused = false;
+	this.halted = false;
+	
+    this._requestFrame();
+};
+
+
+LoresAnimator.prototype.step = function(timestamp) {
+	var self = this;
+	
+	if(!this.started) {
+		throw "Invalid state for step()";
+	}
+	
+	if(this.halted || this.paused) return;
+	
+	setTimeout(function() {
+        self._requestFrame();
+        self.animFrame(timestamp);
+    }, 1000 / self.fps);
+};
+
+
+LoresAnimator.prototype._requestFrame = function() {
+	
+	if(this.halted || this.paused) return;
+	
+	var self = this;
+	window.requestAnimationFrame(function(time){self.step(time)});
+};
+
diff --git a/js/lores-base.js b/js/lores-base.js
new file mode 100644
index 0000000..f9f0b94
--- /dev/null
+++ b/js/lores-base.js
@@ -0,0 +1,847 @@
+// Lores.js - base module
+// (c) Ondrej Hruska 2013
+// www.ondrovo.com
+
+// MIT license
+
+
+/* Display module with mouse input */
+function LoresDisplay(element, options) {
+	
+	var self = this;
+	
+	this.wrapper = $(element);
+	options = options || {};
+	options.width = options.width || $(element).width();
+	options.height = options.height || $(element).height();
+	options.cols = options.cols || 16;
+	options.rows = options.rows || 16;
+	options.bg = options.bg || 0;
+	options.fg = options.fg || 1;
+	
+	options.colors = new LoresPalette(options.colors) || new LoresPalette();
+	
+	options.filter = options.filter || new LoresColorFilter();
+	
+	this.colors = options.colors;
+	this.filter = options.filter;
+	
+	this.width = options.width;
+	this.height = options.height;
+
+	this.rows = options.rows;
+	this.cols = options.cols;
+	
+	this.pixelWidth = (this.width/this.cols);
+	this.pixelHeight = (this.height/this.rows);
+
+	this.bg = options.bg;
+	this.fg = options.fg;
+	
+	
+	// build a canvas
+	//this.wrapper.empty();
+	
+	this.canvas = $('<canvas/>')
+		.css({position: "absolute", left: 0, top: 0})
+		.attr({"width": this.width, "height": this.height})
+		.appendTo(this.wrapper);
+	
+	this.context = this.canvas[0].getContext('2d');
+	
+	this.erase(true);
+	
+	
+	// mouse input
+	
+	// undefined if none
+	this.moveHandler = options.moveHandler;
+	this.rawMoveHandler = options.rawMoveHandler;
+	
+	this.clickHandler = options.clickHandler;
+	this.rawClickHandler = options.rawClickHandler;
+	
+	this.mouseDown = false;
+	
+	this.lastMousePos = {x:-1,y:-1,outside:true};
+	this.lastMousePosRaw = {x:-1,y:-1,outside:true};
+	
+	
+	// add click handler
+	$(this.canvas).on('click', function(evt) {
+		var pos = self._getMousePos(self.canvas, evt);
+		
+		if(self.rawClickHandler) {
+			var pixel = {
+				x: pos.x,
+				y: pos.y,
+				outside: false,
+			};
+			
+			self.rawClickHandler(pixel, self);
+		}
+		
+		if(self.clickHandler) {
+			
+			var pixel = {
+				x: Math.floor(pos.x / self.pixelWidth),
+				y: Math.floor(pos.y / self.pixelHeight),
+			};
+		
+			self.clickHandler(pixel, self);
+		}
+	});
+	
+	
+	// add move handler
+	$(window).on('mousemove', function(evt) {
+		var pos = self._getMousePos(self.canvas, evt);
+
+		
+		if(self.rawMoveHandler) {
+			var pixel = {
+				x: pos.x,
+				y: pos.y,
+				outside: false,
+			};
+			
+			if(pixel.x < 0 || pixel.x >= self.width || pixel.y < 0 || pixel.y >= self.height) {
+				pixel.outside = true;
+			}
+		
+			self.rawMoveHandler(pixel, self);
+			self.lastMousePosRaw = pixel;
+		}
+		
+		if(self.moveHandler) {
+			var pixel = {
+				x: Math.floor(pos.x / self.pixelWidth),
+				y: Math.floor(pos.y / self.pixelHeight),
+				outside: false,
+			};
+			
+			if(pixel.x < 0 || pixel.x >= self.cols || pixel.y < 0 || pixel.y >= self.rows) {
+				pixel.outside = true;
+			}
+			
+			if(self.lastMousePos.x != pixel.x || self.lastMousePos.y != pixel.y) {
+				self.moveHandler(pixel, self.lastMousePos, self);
+				self.lastMousePos = pixel;
+			}
+		}
+	});
+	
+	
+	$(window).on('mousedown', function(evt) {
+		self.mouseDown = true;
+	});
+	
+	
+	$(window).on('mouseup', function(evt) {
+		self.mouseDown = false;
+	});
+};
+
+
+LoresDisplay.prototype.erase = function(fillWithBg) {
+
+	if(fillWithBg) {
+		this.fill(this.bg);
+	} else {
+		this.context.clearRect(0,0,this.width,this.height);
+	}
+};
+
+
+LoresDisplay.prototype.fill = function(color) {
+
+	color = this.resolveColor(color);
+	
+	if(color == -1) {
+		color = this.resolveColor(this.bg);
+	}	
+	
+	if(color == -1) {
+		this.erase(false);
+	} else {
+		this.context.fillStyle = color;
+		this.context.fillRect(0,0,this.width,this.height);
+	}
+};
+
+
+LoresDisplay.prototype.getCanvas = function() {
+	return this.canvas;
+};
+
+
+LoresDisplay.prototype.getContext = function() {
+	return this.context;
+};
+
+
+LoresDisplay.prototype.getPalette = function() {
+	return this.colors;
+};
+
+
+LoresDisplay.prototype.setPalette = function(newPalette) {
+	this.colors = newPalette;
+};
+
+
+LoresDisplay.prototype.getColorFilter = function() {
+	return this.filter;
+};
+
+
+LoresDisplay.prototype.setColorFilter = function(newFilter) {
+	this.filter = newFilter;
+};
+
+
+LoresDisplay.prototype.addFilter = function(from, to) {
+	this.filter.addFilter(from, to);
+};
+
+
+LoresDisplay.prototype.removeFilter = function(color) {
+	this.filter.removeFilter(color);
+};
+
+
+LoresDisplay.prototype.getPixelSize = function() {
+	return {
+		x: this.pixelWidth,
+		w: this.pixelWidth,
+		y: this.pixelHeight,
+		h: this.pixelHeight,
+	};
+};
+
+
+LoresDisplay.prototype.resolveColor = function(color) {
+		
+	if(color === undefined || color === null || color === "") {
+		throw "Null color";
+	} else if(typeof color == "boolean") {
+		color = color ? this.fg : this.bg;
+	} else if(color == "transparent") {
+		color = -1;
+	}
+	
+	color = this.filter.process(color);
+	
+	
+	if(typeof color == "number") {
+		
+		if(color == -1) return -1; // alpha = bg
+		
+		var color = this.getColor(color);
+		
+		if(color === undefined) {
+			throw "Undefined color id '" + JSON.stringify(color) + "'";
+		}
+	}
+	
+	
+	return color;
+};
+
+
+// alias
+LoresDisplay.prototype.setColor = function(index, color) {
+	this.colors.add(index, color);
+};
+
+
+LoresDisplay.prototype.addColor = function(index, color) {
+	this.colors.add(index, color);
+};
+
+
+LoresDisplay.prototype.removeColor = function(index) {
+	this.colors.remove(index, color);
+};
+
+
+LoresDisplay.prototype.hasColor = function(index) {
+	return index == -1 || this.colors.has(index);
+};
+
+
+LoresDisplay.prototype.getColor = function(index) {
+	return this.colors.get(index);
+};
+
+
+LoresDisplay.prototype.setBg = function(color) {
+	this.bg = color;
+};
+
+
+LoresDisplay.prototype.erasePixel = function(x, y) {
+	this.setPixel(x, y, -1);
+};
+
+
+LoresDisplay.prototype.setPixel = function(x, y, color) {
+	
+	color = this.resolveColor(color);
+	
+	if(color == -1) {
+		color = this.resolveColor(this.bg);
+	}
+
+	x = Math.floor(x);
+	y = Math.floor(y);
+	
+	var x1 = x * this.pixelWidth;
+	var y1 = y * this.pixelHeight;
+	
+	if(color == -1) {
+		this.context.clearRect(x1, y1, this.pixelWidth, this.pixelHeight);
+	} else {
+		this.context.fillStyle = color;
+		this.context.fillRect(x1, y1, this.pixelWidth, this.pixelHeight);
+	}
+};
+
+
+/* moveHandler(display, pos, lastPos) */
+LoresDisplay.prototype.setMoveHandler = function(handler) {
+	this.moveHandler = handler;
+};
+
+
+/* rawMoveHandler(display, pos, lastPos) */
+LoresDisplay.prototype.setRawMoveHandler = function(handler) {
+	this.rawMoveHandler = handler;
+};
+
+
+/* clickHandler(display, pos) */
+LoresDisplay.prototype.setClickHandler = function(handler) {
+	this.clickHandler = handler;
+};
+
+
+LoresDisplay.prototype.isMouseDown = function() {
+	return this.mouseDown;
+};
+
+
+LoresDisplay.prototype.resetMouse = function() {
+	this.mouseDown = false;
+};
+
+
+LoresDisplay.prototype._getMousePos = function(canvas, event) {
+	var rect = canvas[0].getBoundingClientRect();
+	return {
+		x: event.clientX - rect.left,
+		y: event.clientY - rect.top
+	};
+};
+
+
+LoresDisplay.prototype.getWidth = function() {
+	return this.cols;
+};
+
+
+LoresDisplay.prototype.getHeight = function() {
+	return this.rows;
+};
+
+
+LoresDisplay.prototype.drawMap = function(map, x, y) {
+	
+	for(var yy = 0; yy<map.getHeight(); yy++) {
+		if(y+yy >= this.rows) break;
+		if(y+yy < 0) continue;
+		
+		for(var xx = 0; xx<map.getWidth(); xx++) {
+			
+			var color = map.getPixel(xx,yy);
+			
+			if(x+xx >= this.cols) break;
+			if(x+xx < 0) continue;
+			
+			this.setPixel(x+xx, y+yy, color);
+		}
+	}
+	
+};
+
+
+LoresDisplay.prototype.getMap = function() {
+	var map = new LoresPixmap(this.cols, this.rows, this.bg);
+	map.connectedDisplay = this;
+	return map;
+};
+
+
+
+
+/* Color table */
+function LoresPalette(values) {
+	this.table = {
+		0: "#000000",
+		1: "#00ff00",
+	};
+	
+	this.table = $.extend( this.table, values );
+};
+
+
+// alias
+LoresPalette.prototype.set = function(index, color) {
+	this.add(index, color);
+};
+
+
+LoresPalette.prototype.add = function(index, color) {
+	this.table[index] = color;
+};
+
+
+LoresPalette.prototype.remove = function(index) {
+	delete this.table[index];
+};
+
+
+LoresPalette.prototype.has = function(index) {
+	return this.table[index] !== undefined;
+};
+
+
+LoresPalette.prototype.get = function(index) {
+	return this.table[index];
+};
+
+
+
+
+/* Pixel map */
+function LoresPixmap(width, height, fill) {
+	
+	this.doAutoFlush = true;
+	this.connectedDisplay = null;
+	if(fill == undefined) fill = -1;
+	this.bg = fill;
+	
+	if(width === undefined || height === undefined) return;
+	
+	this.width = width;
+	this.height = height;
+	
+	this.map = [];
+	
+	for(var y=0; y<height; y++) {
+		var row = [];
+		for(var x=0; x<width; x++) {
+			row.push(fill);
+		}
+		this.map.push(row);
+	}
+	
+}
+
+
+LoresPixmap.fromArray = function(array){
+	var pm = new LoresPixmap();
+	pm.setArray(array);
+	return pm;
+};
+
+LoresPixmap.fromString = function(string, colors, width, height){
+	var pm = new LoresPixmap();
+	
+	var array = [];
+	
+	if(height == undefined) {
+		height = Math.floor(string.length / width);
+	}
+	
+	outer:
+	for(var y=0; y<height; y++) {
+		var row = [];
+		for(var x=0; x<width; x++) {
+			
+			var char = string.charAt(y*width+x);
+			
+			if(char == undefined) break outer;
+			
+			var color = colors[char];
+			
+			if(color === undefined) color = -1;
+			
+			row.push(color);
+		}
+		array.push(row);
+	}
+	
+	pm.setArray(array);
+	return pm;
+};
+
+
+LoresPixmap.prototype.setBg = function(color) {
+	this.bg = color;
+};
+
+
+LoresPixmap.prototype.erase = function() {
+	this.fill(this.bg);
+};
+
+
+LoresPixmap.prototype.fill = function(color) {
+	for(var y=0; y<this.height; y++) {
+		for(var x=0; x<this.width; x++) {
+			this.setPixel(x,y,color);
+		}
+	}
+};
+
+
+LoresPixmap.prototype.setPixel = function(x,y,color) {
+	
+	if(x >= this.width || x < 0 || y >= this.height || y < 0 ) return;
+	
+	if(this.map[y][x] == color) return; // no need to overwrite it
+	
+	this.map[y][x] = color;
+	
+	if(color != -1 && this.doAutoFlush && this.connectedDisplay !== null) {
+		this.connectedDisplay.setPixel(x,y,color);
+	}
+};
+
+
+LoresPixmap.prototype.getPixel = function(x,y) {
+	if(x >= this.width || x < 0 || y >= this.height || y < 0 ) return -1;
+	
+	return this.map[y][x];
+};
+
+
+LoresPixmap.prototype.getArray = function() {
+	return this.map;
+};
+
+
+LoresPixmap.prototype.setArray = function(dataArray) {
+	this.width = dataArray[0].length;
+	this.height = dataArray.length;
+	
+	this.map = dataArray;
+};
+
+
+LoresPixmap.prototype.getWidth = function() {
+	return this.width;
+};
+
+
+LoresPixmap.prototype.getHeight = function() {
+	return this.height;
+};
+
+
+LoresPixmap.prototype.drawMap = function(otherMap, x, y) {
+	
+	for(var yy = 0; yy < otherMap.getHeight(); yy++) {
+		for(var xx = 0; xx < otherMap.getWidth(); xx++) {
+			
+			var color = otherMap.getPixel(xx,yy);
+			if(color == -1) continue; // transparent = no draw
+			this.setPixel(x+xx, y+yy, color);
+			
+		}
+	}
+};
+
+
+LoresPixmap.prototype.eraseMap = function(otherMap, x, y) {
+		
+	for(var yy = 0; yy < otherMap.getHeight(); yy++) {
+		for(var xx = 0; xx < otherMap.getWidth(); xx++) {
+			
+			var color = otherMap.getPixel(xx,yy);
+			if(color == -1) continue; // transparent = no draw
+			this.setPixel(x+xx, y+yy, this.bg);
+			
+		}
+	}
+};
+
+
+LoresPixmap.prototype.eraseRect = function(x, y, w, h) {
+	
+	for(var yy = 0; yy < h; yy++) {
+		for(var xx = 0; xx < w; xx++) {
+			
+			this.setPixel(x+xx, y+yy, this.bg);
+		}
+	}
+};
+
+
+LoresPixmap.prototype.fillRect = function(x, y, w, h, color) {
+	
+	for(var yy = 0; yy < h; yy++) {
+		for(var xx = 0; xx < w; xx++) {
+			
+			this.setPixel(x+xx, y+yy, color);
+		}
+	}
+};
+
+
+LoresPixmap.prototype.flush = function() {
+	if(this.connectedDisplay == null) {
+		throw "Cannot flush map without a connected display.";
+	}
+	
+	this.connectedDisplay.drawMap(this, 0, 0);
+};
+
+
+LoresPixmap.prototype.autoFlush = function(state) {
+	this.doAutoFlush = state;
+};
+
+
+
+
+/* Color filter
+ * 
+ * Used to translate color codes when
+ * writing from a pixmap to display
+ */
+function LoresColorFilter(translations) {
+	this.table = translations || {};
+}
+
+
+LoresColorFilter.prototype.process = function(color) {
+	color = (this.table[color] !== undefined) ? this.table[color] : color;
+	return color;
+};
+
+
+LoresColorFilter.prototype.addFilter = function(from, to) {
+	this.table[from] = to;
+};
+
+
+LoresColorFilter.prototype.removeFilter = function(color) {
+	delete this.table[from];
+};
+
+
+
+
+/* Keyboard input handler */
+function LoresKeyboard() {
+	
+	this.states = {};
+
+	this.pressHandlers = {};
+	this.downHandlers = {};
+	this.upHandlers = {};
+	
+	var self = this;
+
+	$(window).on("keydown", function(event) {
+		self.states[event.which] = true;
+		self.downHandlers[event.which] && self.downHandlers[event.which](event.which);
+	});
+	
+	$(window).on("keyup", function(event) {
+		self.states[event.which] = false;
+		self.upHandlers[event.which] && self.upHandlers[event.which](event.which);
+	});
+	
+	$(window).on("keypress", function(event) {
+		self.pressHandlers[event.which] && self.pressHandlers[event.which](event.which);
+	});
+	
+};
+
+LoresKeyboard.DELETE = 46;
+LoresKeyboard.BACKSPACE = 8;
+LoresKeyboard.SPACE = 32;
+LoresKeyboard.ENTER = 13;
+LoresKeyboard.ESC = 27;
+
+LoresKeyboard.LEFT = 37;
+LoresKeyboard.RIGHT = 39;
+LoresKeyboard.UP = 38;
+LoresKeyboard.DOWN = 40;
+
+LoresKeyboard.CTRL = 17;
+LoresKeyboard.SHIFT = 16;
+LoresKeyboard.META = 91;
+LoresKeyboard.INSERT = 45;
+LoresKeyboard.PAGEUP = 33;
+LoresKeyboard.PAGEDOWN = 34;
+LoresKeyboard.HOME = 36;
+LoresKeyboard.END = 35;
+
+LoresKeyboard.A = 65;
+LoresKeyboard.B = 66;
+LoresKeyboard.C = 67;
+LoresKeyboard.D = 68;
+LoresKeyboard.E = 69;
+LoresKeyboard.F = 70;
+LoresKeyboard.G = 71;
+LoresKeyboard.H = 72;
+LoresKeyboard.I = 73;
+LoresKeyboard.J = 74;
+LoresKeyboard.K = 75;
+LoresKeyboard.L = 76;
+LoresKeyboard.M = 77;
+LoresKeyboard.N = 78;
+LoresKeyboard.O = 79;
+LoresKeyboard.P = 80;
+LoresKeyboard.Q = 81;
+LoresKeyboard.R = 82;
+LoresKeyboard.S = 83;
+LoresKeyboard.T = 84;
+LoresKeyboard.U = 85;
+LoresKeyboard.V = 86;
+LoresKeyboard.W = 87;
+LoresKeyboard.X = 88;
+LoresKeyboard.Y = 89;
+LoresKeyboard.Z = 90;
+
+LoresKeyboard.NUM_0 = 96;
+LoresKeyboard.NUM_1 = 97;
+LoresKeyboard.NUM_2 = 98;
+LoresKeyboard.NUM_3 = 99;
+LoresKeyboard.NUM_4 = 100;
+LoresKeyboard.NUM_5 = 101;
+LoresKeyboard.NUM_6 = 102;
+LoresKeyboard.NUM_7 = 103;
+LoresKeyboard.NUM_8 = 104;
+LoresKeyboard.NUM_9 = 105;
+
+LoresKeyboard.LETTERS = [65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90];
+LoresKeyboard.ASDW = [65,83,68,87];
+LoresKeyboard.ARROWS = [37,38,39,40];
+LoresKeyboard.NUMBERS = [96,97,98,99,100,101,102,103,104,105];
+
+
+
+LoresKeyboard.prototype.isDown = function(keycode) {
+	var val = this.states[keycode];
+	if(val == undefined) val = false;
+	return val;
+};
+
+
+LoresKeyboard.prototype.resetKeys = function() {
+	this.states = {};
+};
+
+
+LoresKeyboard.prototype.setPressHandler = function(keycode, handler) {
+	
+	if(keycode.constructor == Array) {
+		
+		for(var i=0; i<keycode.length; i++) {
+			this.pressHandlers[ keycode[i] ] = handler;
+		}
+		
+	} else {
+		
+		this.pressHandlers[keycode] = handler;
+		
+	}
+	
+};
+
+
+LoresKeyboard.prototype.setDownHandler = function(keycode, handler) {
+	
+	if(keycode.constructor == Array) {
+		
+		for(var i=0; i<keycode.length; i++) {
+			this.downHandlers[ keycode[i] ] = handler;
+		}
+		
+	} else {
+		
+		this.downHandlers[keycode] = handler;
+		
+	}
+	
+};
+
+
+LoresKeyboard.prototype.setUpHandler = function(keycode, handler) {
+	
+	if(keycode.constructor == Array) {
+		
+		for(var i=0; i<keycode.length; i++) {
+			this.upHandlers[ keycode[i] ] = handler;
+		}
+		
+	} else {
+		
+		this.upHandlers[keycode] = handler;
+		
+	}
+	
+};
+
+
+LoresKeyboard.prototype.removePressHandler = function(keycode) {
+	delete this.pressHandlers[keycode];
+};
+
+
+LoresKeyboard.prototype.removeDownHandler = function(keycode) {
+	delete this.downHandlers[keycode];
+};
+
+
+LoresKeyboard.prototype.removeUpHandler = function(keycode) {
+	delete this.upHandlers[keycode];
+};
+
+
+
+
+// INCLUDED SHIM FOR requestAnimationFrame
+// http://paulirish.com/2011/requestanimationframe-for-smart-animating/
+// http://my.opera.com/emoller/blog/2011/12/20/requestanimationframe-for-smart-er-animating
+// requestAnimationFrame polyfill by Erik Möller. fixes from Paul Irish and Tino Zijdel
+// MIT license
+(function() {
+	var lastTime = 0;
+	var vendors = ['ms', 'moz', 'webkit', 'o'];
+	for(var x = 0; x < vendors.length && !window.requestAnimationFrame; ++x) {
+		window.requestAnimationFrame = window[vendors[x]+'RequestAnimationFrame'];
+		window.cancelAnimationFrame = window[vendors[x]+'CancelAnimationFrame'] 
+								|| window[vendors[x]+'CancelRequestAnimationFrame'];
+	}
+
+	if (!window.requestAnimationFrame)
+		window.requestAnimationFrame = function(callback, element) {
+			var currTime = new Date().getTime();
+			var timeToCall = Math.max(0, 16 - (currTime - lastTime));
+			var id = window.setTimeout(function() { callback(currTime + timeToCall); }, 
+			timeToCall);
+			lastTime = currTime + timeToCall;
+			return id;
+		};
+
+	if (!window.cancelAnimationFrame)
+		window.cancelAnimationFrame = function(id) {
+			clearTimeout(id);
+		};
+}());
diff --git a/js/lores-sprites.js b/js/lores-sprites.js
new file mode 100644
index 0000000..d64fb9b
--- /dev/null
+++ b/js/lores-sprites.js
@@ -0,0 +1,199 @@
+// Lores.js - sprites module
+// (c) Ondrej Hruska 2013
+// www.ondrovo.com
+
+// MIT license
+
+
+function LoresSpritePool(map) {
+	this.drawingMap = map || null;
+	this.sprites = [];
+}
+
+
+LoresSpritePool.prototype.setMap = function(map) {
+	this.drawingMap = map;
+};
+
+
+LoresSpritePool.prototype.addSprite = function(sprite) {
+	if(this.hasSprite(sprite)) return; // no work to do
+	this.sprites.push(sprite);
+	this.sortSprites(); // sort them
+};
+
+LoresSpritePool.prototype.hasSprite = function(sprite) {
+	for(var i in this.sprites) {
+		if(this.sprites[i] === sprite) {
+			return true;
+		}
+	}
+	return false;
+};
+
+
+LoresSpritePool.prototype.removeSprite = function(sprite) {
+	for (var i = this.sprites.length - 1; i >= 0; i--) {
+		if (this.sprites[i] == sprite) this.sprites.splice(i, 1);
+	}
+};
+
+
+LoresSpritePool.prototype.getSprites = function() {
+	return this.sprites;
+};
+
+
+LoresSpritePool.prototype.getColliding = function(sprite, pixelPerfect) {
+	var results = [];
+	for(var i in this.sprites) {
+		var spr = this.sprites[i];
+		if(spr === sprite) continue;
+		if(spr.collidesWith(sprite, pixelPerfect)) {
+			results.push(spr);
+		}
+	}
+	return results;
+};
+
+
+LoresSpritePool.prototype.eraseMap = function() {
+	if(this.drawingMap == undefined) throw "LoresSpritePool has no map.";
+	
+	this.drawingMap.erase();
+};
+
+
+LoresSpritePool.prototype.drawOnMap = function() {
+	if(this.drawingMap == undefined) throw "LoresSpritePool has no map.";
+	
+	for(var i in this.sprites) {
+		this.sprites[i].drawOnMap(this.drawingMap);
+	}
+};
+
+
+LoresSpritePool.prototype.eraseOnMap = function(perPixel) {
+	if(this.drawingMap == undefined) throw "LoresSpritePool has no map.";
+		
+	for(var i in this.sprites) {
+		this.sprites[i].eraseOnMap(this.drawingMap, perPixel);
+	}
+};
+
+
+LoresSpritePool.prototype.sortSprites = function() {
+	this.sprites.sort(function(a,b) {
+		return (a.z > b.z) ? -1 : ((b.z > a.z) ? 1 : 0);
+	});
+};
+
+
+LoresSpritePool.prototype.moveSprites = function() {
+	for(var i in this.sprites) {
+		this.sprites[i].doMove();
+	}
+};
+
+
+
+
+function LoresSprite(opts) {
+	this.map = opts.map;
+	
+	this.x = opts.x;
+	this.y = opts.y;
+	
+	this.newx = opts.x;
+	this.newy = opts.y;
+	
+	this.z = (opts.z === undefined ? 0 : opts.z); // z-index
+}
+
+
+LoresSprite.prototype.setMap = function(map) {
+	this.map = map;
+};
+
+
+LoresSprite.prototype.setPosition = function(xpos, ypos) {
+	this.newx = xpos;
+	this.newy = ypos;
+};
+
+
+LoresSprite.prototype.scheduleMove = function(xoffset, yoffset) {
+	this.newx = this.x + xoffset;
+	this.newy = this.y + yoffset;
+};
+
+
+LoresSprite.prototype.doMove = function() {
+	this.x = this.newx;
+	this.y = this.newy;
+};
+
+
+LoresSprite.prototype.getWidth = function() {
+	return this.map.getWidth();
+};
+
+
+LoresSprite.prototype.getHeight = function() {
+	return this.map.getHeight();
+};
+
+
+LoresSprite.prototype.collidesWith = function(other, pixelPerfect) {
+	var x1L = this.x;
+	var x1R = this.x + this.getWidth() - 1;
+	var y1U = this.y;
+	var y1D = this.y + this.getHeight() - 1;
+	
+	var x2L = other.x;
+	var x2R = other.x + other.getWidth() - 1;
+	var y2U = other.y;
+	var y2D = other.y + other.getHeight() - 1;
+	
+	var horizontal = x1L >= x2L && x1L <= x2R;
+	horizontal |= x1R <= x2R && x1R >= x2L;
+	
+	var vertical = y1U >= y2U && y1U <= y2D;
+	vertical |= y1D <= y2D && y1D >= y2U;
+	
+	var rectCollides = (horizontal && vertical);
+	
+	if(!rectCollides) return false; // surely
+	
+	if(!pixelPerfect) {
+		return true; // rect collision suffices
+		
+	} else {
+		
+		for(var yy = Math.max(y1U, y2U); yy <= Math.min(y1D, y2D); yy++) {
+			for(var xx = Math.max(x1L, x2L); xx <= Math.min(x1R, x2R); xx++) {
+				
+				var c1 = this.map.getPixel( (xx - x1L), (yy - y1U) );
+				var c2 = other.map.getPixel( (xx - x2L), (yy - y2U) );
+				
+				if(c1 != -1 && c2 != -1) return true; // collision detected
+			}
+		}
+		
+		return false; // nope
+	}
+};
+
+
+LoresSprite.prototype.drawOnMap = function(map) {
+	map.drawMap(this.map, this.x, this.y);
+};
+
+
+LoresSprite.prototype.eraseOnMap = function(map, perPixel) {
+	if(perPixel) {
+		map.eraseMap(this.map, this.x, this.y);
+	} else {
+		map.eraseRect(this.x, this.y, this.map.getWidth(), this.map.getHeight());
+	}
+};
\ No newline at end of file