tv_xiaoyouxi/games/symdsb/frameworks/cocos2d-html5/CCTMXLayer.js

/****************************************************************************
 Copyright (c) 2008-2010 Ricardo Quesada
 Copyright (c) 2011-2012 cocos2d-x.org
 Copyright (c) 2013-2014 Chukong Technologies Inc.

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/**
 * <p>cc.TMXLayer represents the TMX layer. </p>
 *
 * <p>It is a subclass of cc.SpriteBatchNode. By default the tiles are rendered using a cc.TextureAtlas. <br />
 * If you modify a tile on runtime, then, that tile will become a cc.Sprite, otherwise no cc.Sprite objects are created. <br />
 * The benefits of using cc.Sprite objects as tiles are: <br />
 * - tiles (cc.Sprite) can be rotated/scaled/moved with a nice API </p>
 *
 * <p>If the layer contains a property named "cc.vertexz" with an integer (in can be positive or negative), <br />
 * then all the tiles belonging to the layer will use that value as their OpenGL vertex Z for depth. </p>
 *
 * <p>On the other hand, if the "cc.vertexz" property has the "automatic" value, then the tiles will use an automatic vertex Z value. <br />
 * Also before drawing the tiles, GL_ALPHA_TEST will be enabled, and disabled after drawing them. The used alpha func will be:  </p>
 *
 * glAlphaFunc( GL_GREATER, value ) <br />
 *
 * <p>"value" by default is 0, but you can change it from Tiled by adding the "cc_alpha_func" property to the layer. <br />
 * The value 0 should work for most cases, but if you have tiles that are semi-transparent, then you might want to use a different value, like 0.5.</p>
 * @class
 * @extends cc.SpriteBatchNode
 *
 * @property {Array}                tiles               - Tiles for layer
 * @property {cc.TMXTilesetInfo}    tileset             - Tileset for layer
 * @property {Number}               layerOrientation    - Layer orientation
 * @property {Array}                properties          - Properties from the layer. They can be added using tilemap editors
 * @property {String}               layerName           - Name of the layer
 * @property {Number}               layerWidth          - Width of the layer
 * @property {Number}               layerHeight         - Height of the layer
 * @property {Number}               tileWidth           - Width of a tile
 * @property {Number}               tileHeight          - Height of a tile
 */
cc.TMXLayer = cc.SpriteBatchNode.extend(/** @lends cc.TMXLayer# */{
	tiles: null,
	tileset: null,
	layerOrientation: null,
	properties: null,
	layerName: "",

    //size of the layer in tiles
    _layerSize: null,
    _mapTileSize: null,
    //TMX Layer supports opacity
    _opacity: 255,
    _minGID: null,
    _maxGID: null,
    //Only used when vertexZ is used
    _vertexZvalue: null,
    _useAutomaticVertexZ: null,
    _alphaFuncValue: null,
    //used for optimization
    _reusedTile: null,
    _atlasIndexArray: null,
    //used for retina display
    _contentScaleFactor: null,

    _cacheCanvas:null,
    _cacheContext:null,
    _cacheTexture:null,
    // Sub caches for avoid Chrome big image draw issue
    _subCacheCanvas:null,
    _subCacheContext:null,
    _subCacheCount:0,
    _subCacheWidth:0,
    // Maximum pixel number by cache, a little more than 3072*3072, real limit is 4096*4096
    _maxCachePixel:10000000,
    _className:"TMXLayer",

    /**
     * Creates a cc.TMXLayer with an tile set info, a layer info and a map info   <br/>
     * Constructor of cc.TMXLayer
     * @param {cc.TMXTilesetInfo} tilesetInfo
     * @param {cc.TMXLayerInfo} layerInfo
     * @param {cc.TMXMapInfo} mapInfo
     */
    ctor:function (tilesetInfo, layerInfo, mapInfo) {
        cc.SpriteBatchNode.prototype.ctor.call(this);
        this._descendants = [];

        this._layerSize = cc.size(0, 0);
        this._mapTileSize = cc.size(0, 0);

        if(cc._renderType === cc._RENDER_TYPE_CANVAS){
            var locCanvas = cc._canvas;
            var tmpCanvas = cc.newElement('canvas');
            tmpCanvas.width = locCanvas.width;
            tmpCanvas.height = locCanvas.height;
            this._cacheCanvas = tmpCanvas;
            this._cacheContext = this._cacheCanvas.getContext('2d');
            var tempTexture = new cc.Texture2D();
            tempTexture.initWithElement(tmpCanvas);
            tempTexture.handleLoadedTexture();
            this._cacheTexture = tempTexture;
            this.width = locCanvas.width;
	        this.height = locCanvas.height;
	        // This class uses cache, so its default cachedParent should be himself
	        this._cachedParent = this;
        }
        if(mapInfo !== undefined)
            this.initWithTilesetInfo(tilesetInfo, layerInfo, mapInfo);
    },

    /**
     * Sets the untransformed size of the TMXLayer.
     * @override
     * @param {cc.Size|Number} size The untransformed size of the TMXLayer or The untransformed size's width of the TMXLayer.
     * @param {Number} [height] The untransformed size's height of the TMXLayer.
     */
    setContentSize:function (size, height) {
        var locContentSize = this._contentSize;
	    cc.Node.prototype.setContentSize.call(this, size, height);

        if(cc._renderType === cc._RENDER_TYPE_CANVAS){
            var locCanvas = this._cacheCanvas;
            var scaleFactor = cc.contentScaleFactor();
            locCanvas.width = 0 | (locContentSize.width * 1.5 * scaleFactor);
            locCanvas.height = 0 | (locContentSize.height * 1.5 * scaleFactor);

            if(this.layerOrientation === cc.TMX_ORIENTATION_HEX)
                this._cacheContext.translate(0, locCanvas.height - (this._mapTileSize.height * 0.5));                  //translate for hexagonal
            else
                this._cacheContext.translate(0, locCanvas.height);
            var locTexContentSize = this._cacheTexture._contentSize;
            locTexContentSize.width = locCanvas.width;
            locTexContentSize.height = locCanvas.height;

            // Init sub caches if needed
            var totalPixel = locCanvas.width * locCanvas.height;
            if(totalPixel > this._maxCachePixel) {
                if(!this._subCacheCanvas) this._subCacheCanvas = [];
                if(!this._subCacheContext) this._subCacheContext = [];

                this._subCacheCount = Math.ceil( totalPixel / this._maxCachePixel );
                var locSubCacheCanvas = this._subCacheCanvas, i;
                for(i = 0; i < this._subCacheCount; i++) {
                    if(!locSubCacheCanvas[i]) {
                        locSubCacheCanvas[i] = document.createElement('canvas');
                        this._subCacheContext[i] = locSubCacheCanvas[i].getContext('2d');
                    }
                    var tmpCanvas = locSubCacheCanvas[i];
                    tmpCanvas.width = this._subCacheWidth = Math.round( locCanvas.width / this._subCacheCount );
                    tmpCanvas.height = locCanvas.height;
                }
                // Clear wasted cache to release memory
                for(i = this._subCacheCount; i < locSubCacheCanvas.length; i++) {
                    tmpCanvas.width = 0;
                    tmpCanvas.height = 0;
                }
            }
            // Otherwise use count as a flag to disable sub caches
            else this._subCacheCount = 0;
        }
    },

    /**
     * Return texture of cc.SpriteBatchNode
     * @function
     * @return {cc.Texture2D}
     */
	getTexture: null,

    _getTextureForCanvas:function () {
        return this._cacheTexture;
    },

    /**
     * don't call visit on it's children ( override visit of cc.Node )
     * @function
     * @override
     * @param {CanvasRenderingContext2D} ctx
     */
    visit: null,

    _visitForCanvas: function (ctx) {
        var context = ctx || cc._renderContext;
        // quick return if not visible
        if (!this._visible)
            return;

        context.save();
        this.transform(ctx);
        var i, locChildren = this._children;

        if (this._cacheDirty) {
            //
            var eglViewer = cc.view;
            eglViewer._setScaleXYForRenderTexture();
            //add dirty region
            var locCacheContext = this._cacheContext, locCacheCanvas = this._cacheCanvas;
            locCacheContext.clearRect(0, 0, locCacheCanvas.width, -locCacheCanvas.height);
            locCacheContext.save();
            locCacheContext.translate(this._anchorPointInPoints.x, -(this._anchorPointInPoints.y));
            if (locChildren) {
                this.sortAllChildren();
                for (i = 0; i < locChildren.length; i++) {
                    if (locChildren[i])
                        locChildren[i].visit(locCacheContext);
                }
            }
            locCacheContext.restore();
            // Update sub caches if needed
            if(this._subCacheCount > 0) {
                var subCacheW = this._subCacheWidth, subCacheH = locCacheCanvas.height;
                for(i = 0; i < this._subCacheCount; i++) {
                    this._subCacheContext[i].drawImage(locCacheCanvas, i * subCacheW, 0, subCacheW, subCacheH, 0, 0, subCacheW, subCacheH);
                }
            }

            //reset Scale
            eglViewer._resetScale();
            this._cacheDirty = false;
        }
        // draw RenderTexture
        this.draw(ctx);
        context.restore();
    },

    /**
     * draw cc.SpriteBatchNode (override draw of cc.Node)
     * @function
     * @param {CanvasRenderingContext2D} ctx
     */
    draw:null,

    _drawForCanvas:function (ctx) {
        var context = ctx || cc._renderContext;
        //context.globalAlpha = this._opacity / 255;
        var posX = 0 | ( -this._anchorPointInPoints.x), posY = 0 | ( -this._anchorPointInPoints.y);
        var eglViewer = cc.view;
        var locCacheCanvas = this._cacheCanvas;
        //direct draw image by canvas drawImage
        if (locCacheCanvas) {
            var locSubCacheCount = this._subCacheCount, locCanvasHeight = locCacheCanvas.height * eglViewer._scaleY;
            var halfTileSize = this._mapTileSize.height * 0.5 * eglViewer._scaleY;
            if(locSubCacheCount > 0) {
                var locSubCacheCanvasArr = this._subCacheCanvas;
                for(var i = 0; i < locSubCacheCount; i++){
                    var selSubCanvas = locSubCacheCanvasArr[i];
                    if (this.layerOrientation === cc.TMX_ORIENTATION_HEX)
                        context.drawImage(locSubCacheCanvasArr[i], 0, 0, selSubCanvas.width, selSubCanvas.height,
                                posX + i * this._subCacheWidth, -(posY + locCanvasHeight) + halfTileSize, selSubCanvas.width * eglViewer._scaleX, locCanvasHeight);
                    else
                        context.drawImage(locSubCacheCanvasArr[i], 0, 0, selSubCanvas.width, selSubCanvas.height,
                                posX + i * this._subCacheWidth, -(posY + locCanvasHeight), selSubCanvas.width * eglViewer._scaleX, locCanvasHeight);
                }
            } else{
                if (this.layerOrientation === cc.TMX_ORIENTATION_HEX)
                    context.drawImage(locCacheCanvas, 0, 0, locCacheCanvas.width, locCacheCanvas.height,
                        posX, -(posY + locCanvasHeight) + halfTileSize, locCacheCanvas.width * eglViewer._scaleX, locCanvasHeight);
                else
                    context.drawImage(locCacheCanvas, 0, 0, locCacheCanvas.width, locCacheCanvas.height,
                        posX, -(posY + locCanvasHeight), locCacheCanvas.width * eglViewer._scaleX, locCanvasHeight);
            }
        }
    },

    /**
     * Gets layer size.
     * @return {cc.Size}
     */
    getLayerSize:function () {
        return cc.size(this._layerSize.width, this._layerSize.height);
    },

    /**
     * Set layer size
     * @param {cc.Size} Var
     */
    setLayerSize:function (Var) {
        this._layerSize.width = Var.width;
        this._layerSize.height = Var.height;
    },

	_getLayerWidth: function () {
		return this._layerSize.width;
	},
	_setLayerWidth: function (width) {
		this._layerSize.width = width;
	},
	_getLayerHeight: function () {
		return this._layerSize.height;
	},
	_setLayerHeight: function (height) {
		this._layerSize.height = height;
	},

    /**
     * Size of the map's tile (could be different from the tile's size)
     * @return {cc.Size}
     */
    getMapTileSize:function () {
        return cc.size(this._mapTileSize.width,this._mapTileSize.height);
    },

    /**
     * Set the map tile size.
     * @param {cc.Size} Var
     */
    setMapTileSize:function (Var) {
        this._mapTileSize.width = Var.width;
        this._mapTileSize.height = Var.height;
    },

	_getTileWidth: function () {
		return this._mapTileSize.width;
	},
	_setTileWidth: function (width) {
		this._mapTileSize.width = width;
	},
	_getTileHeight: function () {
		return this._mapTileSize.height;
	},
	_setTileHeight: function (height) {
		this._mapTileSize.height = height;
	},

    /**
     * Pointer to the map of tiles
     * @return {Array}
     */
    getTiles:function () {
        return this.tiles;
    },

    /**
     * Pointer to the map of tiles
     * @param {Array} Var
     */
    setTiles:function (Var) {
        this.tiles = Var;
    },

    /**
     * Tile set information for the layer
     * @return {cc.TMXTilesetInfo}
     */
    getTileset:function () {
        return this.tileset;
    },

    /**
     * Tile set information for the layer
     * @param {cc.TMXTilesetInfo} Var
     */
    setTileset:function (Var) {
        this.tileset = Var;
    },

    /**
     * Layer orientation, which is the same as the map orientation
     * @return {Number}
     */
    getLayerOrientation:function () {
        return this.layerOrientation;
    },

    /**
     * Layer orientation, which is the same as the map orientation
     * @param {Number} Var
     */
    setLayerOrientation:function (Var) {
        this.layerOrientation = Var;
    },

    /**
     * properties from the layer. They can be added using Tiled
     * @return {Array}
     */
    getProperties:function () {
        return this.properties;
    },

    /**
     * properties from the layer. They can be added using Tiled
     * @param {Array} Var
     */
    setProperties:function (Var) {
        this.properties = Var;
    },

    /**
     * Initializes a cc.TMXLayer with a tileset info, a layer info and a map info
     * @param {cc.TMXTilesetInfo} tilesetInfo
     * @param {cc.TMXLayerInfo} layerInfo
     * @param {cc.TMXMapInfo} mapInfo
     * @return {Boolean}
     */
    initWithTilesetInfo:function (tilesetInfo, layerInfo, mapInfo) {
        // XXX: is 35% a good estimate ?
        var size = layerInfo._layerSize;
        var totalNumberOfTiles = parseInt(size.width * size.height);
        var capacity = totalNumberOfTiles * 0.35 + 1; // 35 percent is occupied ?
        var texture;
        if (tilesetInfo)
            texture = cc.textureCache.addImage(tilesetInfo.sourceImage);

        if (this.initWithTexture(texture, capacity)) {
            // layerInfo
            this.layerName = layerInfo.name;
            this._layerSize = size;
            this.tiles = layerInfo._tiles;
            this._minGID = layerInfo._minGID;
            this._maxGID = layerInfo._maxGID;
            this._opacity = layerInfo._opacity;
            this.properties = layerInfo.properties;
            this._contentScaleFactor = cc.director.getContentScaleFactor();

            // tilesetInfo
            this.tileset = tilesetInfo;

            // mapInfo
            this._mapTileSize = mapInfo.getTileSize();
            this.layerOrientation = mapInfo.orientation;

            // offset (after layer orientation is set);
            var offset = this._calculateLayerOffset(layerInfo.offset);
            this.setPosition(cc.pointPixelsToPoints(offset));

            this._atlasIndexArray = [];
            this.setContentSize(cc.sizePixelsToPoints(cc.size(this._layerSize.width * this._mapTileSize.width,
                this._layerSize.height * this._mapTileSize.height)));
            this._useAutomaticVertexZ = false;
            this._vertexZvalue = 0;
            return true;
        }
        return false;
    },

    /**
     * <p>Dealloc the map that contains the tile position from memory. <br />
     * Unless you want to know at runtime the tiles positions, you can safely call this method. <br />
     * If you are going to call layer.getTileGIDAt() then, don't release the map</p>
     */
    releaseMap:function () {
        if (this.tiles)
            this.tiles = null;

        if (this._atlasIndexArray)
            this._atlasIndexArray = null;
    },

    /**
     * <p>Returns the tile (cc.Sprite) at a given a tile coordinate. <br/>
     * The returned cc.Sprite will be already added to the cc.TMXLayer. Don't add it again.<br/>
     * The cc.Sprite can be treated like any other cc.Sprite: rotated, scaled, translated, opacity, color, etc. <br/>
     * You can remove either by calling: <br/>
     * - layer.removeChild(sprite, cleanup); <br/>
     * - or layer.removeTileAt(ccp(x,y)); </p>
     * @param {cc.Point|Number} pos or x
     * @param {Number} [y]
     * @return {cc.Sprite}
     */
    getTileAt: function (pos, y) {
        if(!pos)
            throw "cc.TMXLayer.getTileAt(): pos should be non-null";
        if(y !== undefined)
            pos = cc.p(pos, y);
        if(pos.x >= this._layerSize.width || pos.y >= this._layerSize.height || pos.x < 0 || pos.y < 0)
            throw "cc.TMXLayer.getTileAt(): invalid position";
        if(!this.tiles || !this._atlasIndexArray){
            cc.log("cc.TMXLayer.getTileAt(): TMXLayer: the tiles map has been released");
            return null;
        }

        var tile = null, gid = this.getTileGIDAt(pos);

        // if GID == 0, then no tile is present
        if (gid === 0)
            return tile;

        var z = 0 | (pos.x + pos.y * this._layerSize.width);
        tile = this.getChildByTag(z);
        // tile not created yet. create it
        if (!tile) {
            var rect = this.tileset.rectForGID(gid);
            rect = cc.rectPixelsToPoints(rect);

            tile = new cc.Sprite();
            tile.initWithTexture(this.texture, rect);
            tile.batchNode = this;
            tile.setPosition(this.getPositionAt(pos));
            tile.vertexZ = this._vertexZForPos(pos);
            tile.anchorX = 0;
	        tile.anchorY = 0;
            tile.opacity = this._opacity;

            var indexForZ = this._atlasIndexForExistantZ(z);
            this.addSpriteWithoutQuad(tile, indexForZ, z);
        }
        return tile;
    },

    /**
     * Returns the tile gid at a given tile coordinate. <br />
     * if it returns 0, it means that the tile is empty. <br />
     * This method requires the the tile map has not been previously released (eg. don't call layer.releaseMap())<br />
     * @param {cc.Point|Number} pos or x
     * @param {Number} [y]
     * @return {Number}
     */
    getTileGIDAt:function (pos, y) {
        if(!pos)
            throw "cc.TMXLayer.getTileGIDAt(): pos should be non-null";
        if(y !== undefined)
            pos = cc.p(pos, y);
        if(pos.x >= this._layerSize.width || pos.y >= this._layerSize.height || pos.x < 0 || pos.y < 0)
            throw "cc.TMXLayer.getTileGIDAt(): invalid position";
        if(!this.tiles || !this._atlasIndexArray){
            cc.log("cc.TMXLayer.getTileGIDAt(): TMXLayer: the tiles map has been released");
            return null;
        }

        var idx = 0 | (pos.x + pos.y * this._layerSize.width);
        // Bits on the far end of the 32-bit global tile ID are used for tile flags
        var tile = this.tiles[idx];

        return (tile & cc.TMX_TILE_FLIPPED_MASK) >>> 0;
    },
    // XXX: deprecated
    // tileGIDAt:getTileGIDAt,

    /**
     *  lipped tiles can be changed dynamically
     * @param {cc.Point|Number} pos or x
     * @param {Number} [y]
     * @return {Number}
     */
    getTileFlagsAt:function (pos, y) {
        if(!pos)
            throw "cc.TMXLayer.getTileFlagsAt(): pos should be non-null";
        if(y !== undefined)
            pos = cc.p(pos, y);
        if(pos.x >= this._layerSize.width || pos.y >= this._layerSize.height || pos.x < 0 || pos.y < 0)
            throw "cc.TMXLayer.getTileFlagsAt(): invalid position";
        if(!this.tiles || !this._atlasIndexArray){
            cc.log("cc.TMXLayer.getTileFlagsAt(): TMXLayer: the tiles map has been released");
            return null;
        }

        var idx = 0 | (pos.x + pos.y * this._layerSize.width);
        // Bits on the far end of the 32-bit global tile ID are used for tile flags
        var tile = this.tiles[idx];

        return (tile & cc.TMX_TILE_FLIPPED_ALL) >>> 0;
    },
    // XXX: deprecated
    // tileFlagAt:getTileFlagsAt,

    /**
     * <p>Sets the tile gid (gid = tile global id) at a given tile coordinate.<br />
     * The Tile GID can be obtained by using the method "tileGIDAt" or by using the TMX editor . Tileset Mgr +1.<br />
     * If a tile is already placed at that position, then it will be removed.</p>
     * @param {Number} gid
     * @param {cc.Point|Number} posOrX position or x
     * @param {Number} flagsOrY flags or y
     * @param {Number} [flags]
     */
    setTileGID: function(gid, posOrX, flagsOrY, flags) {
        if(!posOrX)
            throw "cc.TMXLayer.setTileGID(): pos should be non-null";
        var pos;
        if (flags !== undefined) {
            pos = cc.p(posOrX, flagsOrY);
        } else {
            pos = posOrX;
            flags = flagsOrY;
        }
        if(pos.x >= this._layerSize.width || pos.y >= this._layerSize.height || pos.x < 0 || pos.y < 0)
            throw "cc.TMXLayer.setTileGID(): invalid position";
        if(!this.tiles || !this._atlasIndexArray){
            cc.log("cc.TMXLayer.setTileGID(): TMXLayer: the tiles map has been released");
            return;
        }
        if(gid !== 0 && gid < this.tileset.firstGid){
            cc.log( "cc.TMXLayer.setTileGID(): invalid gid:" + gid);
            return;
        }

        flags = flags || 0;
        this._setNodeDirtyForCache();
        var currentFlags = this.getTileFlagsAt(pos);
        var currentGID = this.getTileGIDAt(pos);

        if (currentGID != gid || currentFlags != flags) {
            var gidAndFlags = (gid | flags) >>> 0;
            // setting gid=0 is equal to remove the tile
            if (gid === 0)
                this.removeTileAt(pos);
            else if (currentGID === 0)            // empty tile. create a new one
                this._insertTileForGID(gidAndFlags, pos);
            else {                // modifying an existing tile with a non-empty tile
                var z = pos.x + pos.y * this._layerSize.width;
                var sprite = this.getChildByTag(z);
                if (sprite) {
                    var rect = this.tileset.rectForGID(gid);
                    rect = cc.rectPixelsToPoints(rect);

                    sprite.setTextureRect(rect, false);
                    if (flags != null)
                        this._setupTileSprite(sprite, pos, gidAndFlags);

                    this.tiles[z] = gidAndFlags;
                } else
                    this._updateTileForGID(gidAndFlags, pos);
            }
        }
    },

    /**
     * Removes a tile at given tile coordinate
     * @param {cc.Point|Number} pos position or x
     * @param {Number} [y]
     */
    removeTileAt:function (pos, y) {
        if(!pos)
            throw "cc.TMXLayer.removeTileAt(): pos should be non-null";
        if(y !== undefined)
            pos = cc.p(pos, y);
        if(pos.x >= this._layerSize.width || pos.y >= this._layerSize.height || pos.x < 0 || pos.y < 0)
            throw "cc.TMXLayer.removeTileAt(): invalid position";
        if(!this.tiles || !this._atlasIndexArray){
            cc.log("cc.TMXLayer.removeTileAt(): TMXLayer: the tiles map has been released");
            return;
        }

        var gid = this.getTileGIDAt(pos);
        if (gid !== 0) {
            if (cc._renderType === cc._RENDER_TYPE_CANVAS)
                this._setNodeDirtyForCache();
            var z = 0 | (pos.x + pos.y * this._layerSize.width);
            var atlasIndex = this._atlasIndexForExistantZ(z);
            // remove tile from GID map
            this.tiles[z] = 0;

            // remove tile from atlas position array
            this._atlasIndexArray.splice(atlasIndex, 1);

            // remove it from sprites and/or texture atlas
            var sprite = this.getChildByTag(z);

            if (sprite)
                cc.SpriteBatchNode.prototype.removeChild.call(this, sprite, true);           //this.removeChild(sprite, true);
            else {
                if(cc._renderType === cc._RENDER_TYPE_WEBGL)
                    this.textureAtlas.removeQuadAtIndex(atlasIndex);

                // update possible children
                if (this._children) {
                    var locChildren = this._children;
                    for (var i = 0, len = locChildren.length; i < len; i++) {
                        var child = locChildren[i];
                        if (child) {
                            var ai = child.atlasIndex;
                            if (ai >= atlasIndex)
                                child.atlasIndex = ai - 1;
                        }
                    }
                }
            }
        }
    },

    /**
     * Returns the position in pixels of a given tile coordinate
     * @param {cc.Point|Number} pos position or x
     * @param {Number} [y]
     * @return {cc.Point}
     */
    getPositionAt:function (pos, y) {
        if (y !== undefined)
            pos = cc.p(pos, y);
        var ret = cc.p(0,0);
        switch (this.layerOrientation) {
            case cc.TMX_ORIENTATION_ORTHO:
                ret = this._positionForOrthoAt(pos);
                break;
            case cc.TMX_ORIENTATION_ISO:
                ret = this._positionForIsoAt(pos);
                break;
            case cc.TMX_ORIENTATION_HEX:
                ret = this._positionForHexAt(pos);
                break;
        }
        return cc.pointPixelsToPoints(ret);
    },
    // XXX: Deprecated. For backward compatibility only
    // positionAt:getPositionAt,

    /**
     * Return the value for the specific property name
     * @param {String} propertyName
     * @return {*}
     */
    getProperty:function (propertyName) {
        return this.properties[propertyName];
    },

    /**
     * Creates the tiles
     */
    setupTiles:function () {
        // Optimization: quick hack that sets the image size on the tileset
        if (cc._renderType === cc._RENDER_TYPE_CANVAS) {
            this.tileset.imageSize = this._originalTexture.getContentSizeInPixels();
        } else {
            this.tileset.imageSize = this.textureAtlas.texture.getContentSizeInPixels();

            // By default all the tiles are aliased
            // pros:
            //  - easier to render
            // cons:
            //  - difficult to scale / rotate / etc.
            this.textureAtlas.texture.setAliasTexParameters();
        }

        // Parse cocos2d properties
        this._parseInternalProperties();
        if (cc._renderType === cc._RENDER_TYPE_CANVAS)
            this._setNodeDirtyForCache();

        var locLayerHeight = this._layerSize.height, locLayerWidth = this._layerSize.width;
        for (var y = 0; y < locLayerHeight; y++) {
            for (var x = 0; x < locLayerWidth; x++) {
                var pos = x + locLayerWidth * y;
                var gid = this.tiles[pos];

                // XXX: gid == 0 -. empty tile
                if (gid !== 0) {
                    this._appendTileForGID(gid, cc.p(x, y));
                    // Optimization: update min and max GID rendered by the layer
                    this._minGID = Math.min(gid, this._minGID);
                    this._maxGID = Math.max(gid, this._maxGID);
                }
            }
        }

        if (!((this._maxGID >= this.tileset.firstGid) && (this._minGID >= this.tileset.firstGid))) {
            cc.log("cocos2d:TMX: Only 1 tileset per layer is supported");
        }
    },

    /**
     * cc.TMXLayer doesn't support adding a cc.Sprite manually.
     * @warning addChild(child); is not supported on cc.TMXLayer. Instead of setTileGID.
     * @param {cc.Node} child
     * @param {number} zOrder
     * @param {number} tag
     */
    addChild:function (child, zOrder, tag) {
        cc.log("addChild: is not supported on cc.TMXLayer. Instead use setTileGID or tileAt.");
    },

    /**
     * Remove child
     * @param  {cc.Sprite} sprite
     * @param  {Boolean} cleanup
     */
    removeChild:function (sprite, cleanup) {
        // allows removing nil objects
        if (!sprite)
            return;

        if(this._children.indexOf(sprite) === -1){
            cc.log("cc.TMXLayer.removeChild(): Tile does not belong to TMXLayer");
            return;
        }

        if (cc._renderType === cc._RENDER_TYPE_CANVAS)
            this._setNodeDirtyForCache();
        var atlasIndex = sprite.atlasIndex;
        var zz = this._atlasIndexArray[atlasIndex];
        this.tiles[zz] = 0;
        this._atlasIndexArray.splice(atlasIndex, 1);
        cc.SpriteBatchNode.prototype.removeChild.call(this, sprite, cleanup);
    },

    /**
     * Gets the layer name
     * @return {String}
     */
    getLayerName:function () {
        return this.layerName;
    },

    /**
     * Set the layer name
     * @param {String} layerName
     */
    setLayerName:function (layerName) {
        this.layerName = layerName;
    },

    _positionForIsoAt:function (pos) {
        return cc.p(this._mapTileSize.width / 2 * ( this._layerSize.width + pos.x - pos.y - 1),
            this._mapTileSize.height / 2 * (( this._layerSize.height * 2 - pos.x - pos.y) - 2));
    },

    _positionForOrthoAt:function (pos) {
        return cc.p(pos.x * this._mapTileSize.width,
            (this._layerSize.height - pos.y - 1) * this._mapTileSize.height);
    },

    _positionForHexAt:function (pos) {
        var diffY = (pos.x % 2 == 1) ? (-this._mapTileSize.height / 2) : 0;
        return cc.p(pos.x * this._mapTileSize.width * 3 / 4,
            (this._layerSize.height - pos.y - 1) * this._mapTileSize.height + diffY);
    },

    _calculateLayerOffset:function (pos) {
        var ret = cc.p(0,0);
        switch (this.layerOrientation) {
            case cc.TMX_ORIENTATION_ORTHO:
                ret = cc.p(pos.x * this._mapTileSize.width, -pos.y * this._mapTileSize.height);
                break;
            case cc.TMX_ORIENTATION_ISO:
                ret = cc.p((this._mapTileSize.width / 2) * (pos.x - pos.y),
                    (this._mapTileSize.height / 2 ) * (-pos.x - pos.y));
                break;
            case cc.TMX_ORIENTATION_HEX:
                if(pos.x !== 0 || pos.y !== 0)
                    cc.log("offset for hexagonal map not implemented yet");
                break;
        }
        return ret;
    },

    _appendTileForGID:function (gid, pos) {
        var rect = this.tileset.rectForGID(gid);
        rect = cc.rectPixelsToPoints(rect);

        var z = 0 | (pos.x + pos.y * this._layerSize.width);
        var tile = this._reusedTileWithRect(rect);
        this._setupTileSprite(tile, pos, gid);

        // optimization:
        // The difference between appendTileForGID and insertTileforGID is that append is faster, since
        // it appends the tile at the end of the texture atlas
        var indexForZ = this._atlasIndexArray.length;

        // don't add it using the "standard" way.
        this.insertQuadFromSprite(tile, indexForZ);

        // append should be after addQuadFromSprite since it modifies the quantity values
        this._atlasIndexArray.splice(indexForZ, 0, z);
        return tile;
    },

    _insertTileForGID:function (gid, pos) {
        var rect = this.tileset.rectForGID(gid);
        rect = cc.rectPixelsToPoints(rect);

        var z = 0 | (pos.x + pos.y * this._layerSize.width);
        var tile = this._reusedTileWithRect(rect);
        this._setupTileSprite(tile, pos, gid);

        // get atlas index
        var indexForZ = this._atlasIndexForNewZ(z);

        // Optimization: add the quad without adding a child
        this.insertQuadFromSprite(tile, indexForZ);

        // insert it into the local atlasindex array
        this._atlasIndexArray.splice(indexForZ, 0, z);
        // update possible children
        if (this._children) {
            var locChildren = this._children;
            for (var i = 0, len = locChildren.length; i < len; i++) {
                var child = locChildren[i];
                if (child) {
                    var ai = child.atlasIndex;
                    if (ai >= indexForZ)
                        child.atlasIndex = ai + 1;
                }
            }
        }
        this.tiles[z] = gid;
        return tile;
    },

    _updateTileForGID:function (gid, pos) {
        var rect = this.tileset.rectForGID(gid);
        var locScaleFactor = this._contentScaleFactor;
        rect = cc.rect(rect.x / locScaleFactor, rect.y / locScaleFactor,
            rect.width / locScaleFactor, rect.height / locScaleFactor);
        var z = pos.x + pos.y * this._layerSize.width;

        var tile = this._reusedTileWithRect(rect);
        this._setupTileSprite(tile, pos, gid);

        // get atlas index
        tile.atlasIndex = this._atlasIndexForExistantZ(z);
        tile.dirty = true;
        tile.updateTransform();
        this.tiles[z] = gid;

        return tile;
    },

    //The layer recognizes some special properties, like cc_vertez
    _parseInternalProperties:function () {
        // if cc_vertex=automatic, then tiles will be rendered using vertexz
        var vertexz = this.getProperty("cc_vertexz");
        if (vertexz) {
            if (vertexz == "automatic") {
                this._useAutomaticVertexZ = true;
                var alphaFuncVal = this.getProperty("cc_alpha_func");
                var alphaFuncValue = 0;
                if (alphaFuncVal)
                    alphaFuncValue = parseFloat(alphaFuncVal);

                if (cc._renderType === cc._RENDER_TYPE_WEBGL) {
                    this.shaderProgram = cc.shaderCache.programForKey(cc.SHADER_POSITION_TEXTURECOLORALPHATEST);
                    var alphaValueLocation = cc._renderContext.getUniformLocation(this.shaderProgram.getProgram(), cc.UNIFORM_ALPHA_TEST_VALUE_S);
                    // NOTE: alpha test shader is hard-coded to use the equivalent of a glAlphaFunc(GL_GREATER) comparison
                    this.shaderProgram.use();
                    this.shaderProgram.setUniformLocationWith1f(alphaValueLocation, alphaFuncValue);
                }
            } else
                this._vertexZvalue = parseInt(vertexz, 10);
        }
    },

    _setupTileSprite:function (sprite, pos, gid) {
        var z = pos.x + pos.y * this._layerSize.width;
        sprite.setPosition(this.getPositionAt(pos));
        if (cc._renderType === cc._RENDER_TYPE_WEBGL)
            sprite.vertexZ = this._vertexZForPos(pos);
        else
            sprite.tag = z;

        sprite.anchorX = 0;
	    sprite.anchorY = 0;
        sprite.opacity = this._opacity;
        if (cc._renderType === cc._RENDER_TYPE_WEBGL) {
            sprite.rotation = 0.0;
        }

        sprite.setFlippedX(false);
        sprite.setFlippedY(false);

        // Rotation in tiled is achieved using 3 flipped states, flipping across the horizontal, vertical, and diagonal axes of the tiles.
        if ((gid & cc.TMX_TILE_DIAGONAL_FLAG) >>> 0) {
            // put the anchor in the middle for ease of rotation.
            sprite.anchorX = 0.5;
	        sprite.anchorY = 0.5;
            sprite.x = this.getPositionAt(pos).x + sprite.width / 2;
	        sprite.y = this.getPositionAt(pos).y + sprite.height / 2;

            var flag = (gid & (cc.TMX_TILE_HORIZONTAL_FLAG | cc.TMX_TILE_VERTICAL_FLAG) >>> 0) >>> 0;
            // handle the 4 diagonally flipped states.
            if (flag == cc.TMX_TILE_HORIZONTAL_FLAG)
                sprite.rotation = 90;
            else if (flag == cc.TMX_TILE_VERTICAL_FLAG)
                sprite.rotation = 270;
            else if (flag == (cc.TMX_TILE_VERTICAL_FLAG | cc.TMX_TILE_HORIZONTAL_FLAG) >>> 0) {
                sprite.rotation = 90;
	            sprite.setFlippedX(true);
            } else {
                sprite.rotation = 270;
	            sprite.setFlippedX(true);
            }
        } else {
            if ((gid & cc.TMX_TILE_HORIZONTAL_FLAG) >>> 0) {
                sprite.setFlippedX(true);
            }

            if ((gid & cc.TMX_TILE_VERTICAL_FLAG) >>> 0) {
                sprite.setFlippedY(true);
            }
        }
    },

    _reusedTileWithRect:function (rect) {
        if(cc._renderType === cc._RENDER_TYPE_WEBGL){
            if (!this._reusedTile) {
                this._reusedTile = new cc.Sprite();
                this._reusedTile.initWithTexture(this.texture, rect, false);
                this._reusedTile.batchNode = this;
            } else {
                // XXX HACK: Needed because if "batch node" is nil,
                // then the Sprite'squad will be reset
                this._reusedTile.batchNode = null;

                // Re-init the sprite
                this._reusedTile.setTextureRect(rect, false);

                // restore the batch node
                this._reusedTile.batchNode = this;
            }
        } else {
            this._reusedTile = new cc.Sprite();
            this._reusedTile.initWithTexture(this._textureForCanvas, rect, false);
            this._reusedTile.batchNode = this;
            this._reusedTile.parent = this;
        }
        return this._reusedTile;
    },

    _vertexZForPos:function (pos) {
        var ret = 0;
        var maxVal = 0;
        if (this._useAutomaticVertexZ) {
            switch (this.layerOrientation) {
                case cc.TMX_ORIENTATION_ISO:
                    maxVal = this._layerSize.width + this._layerSize.height;
                    ret = -(maxVal - (pos.x + pos.y));
                    break;
                case cc.TMX_ORIENTATION_ORTHO:
                    ret = -(this._layerSize.height - pos.y);
                    break;
                case cc.TMX_ORIENTATION_HEX:
                    cc.log("TMX Hexa zOrder not supported");
                    break;
                default:
                    cc.log("TMX invalid value");
                    break;
            }
        } else
            ret = this._vertexZvalue;
        return ret;
    },

    _atlasIndexForExistantZ:function (z) {
        var item;
        if (this._atlasIndexArray) {
            var locAtlasIndexArray = this._atlasIndexArray;
            for (var i = 0, len = locAtlasIndexArray.length; i < len; i++) {
                item = locAtlasIndexArray[i];
                if (item == z)
                    break;
            }
        }
        if(typeof item != "number")
            cc.log("cc.TMXLayer._atlasIndexForExistantZ(): TMX atlas index not found. Shall not happen");
        return i;
    },

    _atlasIndexForNewZ:function (z) {
        var locAtlasIndexArray = this._atlasIndexArray;
        for (var i = 0, len = locAtlasIndexArray.length; i < len; i++) {
            var val = locAtlasIndexArray[i];
            if (z < val)
                break;
        }
        return i;
    }
});

var _p = cc.TMXLayer.prototype;

if(cc._renderType == cc._RENDER_TYPE_WEBGL){
	_p.draw = cc.SpriteBatchNode.prototype.draw;
    _p.visit = cc.SpriteBatchNode.prototype.visit;
	_p.getTexture = cc.SpriteBatchNode.prototype.getTexture;
}else{
    _p.draw = _p._drawForCanvas;
    _p.visit = _p._visitForCanvas;
	_p.getTexture = _p._getTextureForCanvas;
}

/** @expose */
cc.defineGetterSetter(_p, "texture", _p.getTexture, _p.setTexture);

// Extended properties
/** @expose */
_p.layerWidth;
cc.defineGetterSetter(_p, "layerWidth", _p._getLayerWidth, _p._setLayerWidth);
/** @expose */
_p.layerHeight;
cc.defineGetterSetter(_p, "layerHeight", _p._getLayerHeight, _p._setLayerHeight);
/** @expose */
_p.tileWidth;
cc.defineGetterSetter(_p, "tileWidth", _p._getTileWidth, _p._setTileWidth);
/** @expose */
_p.tileHeight;
cc.defineGetterSetter(_p, "tileHeight", _p._getTileHeight, _p._setTileHeight);


/**
 * Creates a cc.TMXLayer with an tile set info, a layer info and a map info
 * @deprecated since v3.0 please use new cc.TMXLayer(tilesetInfo, layerInfo, mapInfo) instead.
 * @param {cc.TMXTilesetInfo} tilesetInfo
 * @param {cc.TMXLayerInfo} layerInfo
 * @param {cc.TMXMapInfo} mapInfo
 * @return {cc.TMXLayer|Null}
 */
cc.TMXLayer.create = function (tilesetInfo, layerInfo, mapInfo) {
    return new cc.TMXLayer(tilesetInfo, layerInfo, mapInfo);
};