Added first version of zoomifytilesource.js

src/zoomifytilesource.js

@@ -0,0 +1,97 @@
+(function( $ ){
+
+  /**
+   * @class ZoomifyTileSource
+   * @classdesc A tilesource implementation for the zoomify format.
+   *
+   * @memberof OpenSeadragon
+   * @extends OpenSeadragon.TileSource
+   * @param {Number} width - the pixel width of the image.
+   * @param {Number} height
+   * @param {Number} tileSize
+   * @param {String} tilesUrl
+   */
+  $.ZoomifyTileSource = function( options ) {
+
+  	options.tileSize = 256;
+		
+		var currentImageSize = {x:options.width,y:options.height};
+		options.imageSizes = [{x:options.width,y:options.height}];
+  	options.gridSize = [this._getGridSize(options.width,options.height,options.tileSize)];
+		
+  	while(parseInt(currentImageSize.x) > options.tileSize || parseInt(currentImageSize.y) > options.tileSize) {
+				currentImageSize.x = Math.floor(currentImageSize.x/2);
+				currentImageSize.y = Math.floor(currentImageSize.y/2);
+				options.imageSizes.push({x:currentImageSize.x,y:currentImageSize.y});
+				options.gridSize.push(this._getGridSize(currentImageSize.x,currentImageSize.y,options.tileSize));
+			}
+		options.imageSizes.reverse();
+		options.gridSize.reverse();
+		options.minLevel = 0;
+		options.maxLevel = options.gridSize.length-1;
+		
+  	
+  	OpenSeadragon.TileSource.apply( this, [ options ] );
+
+  };
+
+  $.extend( $.ZoomifyTileSource.prototype, $.TileSource.prototype, /** @lends OpenSeadragon.ZoomifyTileSource.prototype */{
+		
+		_getGridSize: function(width,height,tileSize) {
+			return {x: Math.ceil(width/tileSize),y:Math.ceil(height/tileSize)};
+		},
+		
+		_calculateAbsoluteTileNumber: function (level, x, y) {
+			var num = 0;
+			for (var z = 0; z < level; z++) {
+				var size = this.gridSize[z];
+				num += size.x * size.y;
+			}
+			var size = this.gridSize[level];
+			num += size.x*y+ x
+			return num;
+		},
+
+    /**
+     * Determine if the data and/or url imply the image service is supported by
+     * this tile source.
+     * @function
+     * @param {Object|Array} data
+     * @param {String} optional - url
+     */
+    supports: function( data, url ){
+      //console.log('ZoomifyTileSource supports ' + data.type); 
+      return ( data.type && "zoomifytileservice" == data.type );
+    },
+
+    /**
+     *
+     * @function
+     * @param {Object} data - the raw configuration
+     * @param {String} url - the url the data was retreived from if any.
+     * @return {Object} options - A dictionary of keyword arguments sufficient
+     *      to configure this tile sources constructor.
+     */
+    configure: function( data, url ){
+      //console.log('ZoomifyTileSource configure ' + data.tilesUrl);
+      return data;
+    },
+
+
+    /**
+     * @function
+     * @param {Number} level
+     * @param {Number} x
+     * @param {Number} y
+     */
+    getTileUrl: function( level, x, y ){
+			//console.log(level);
+			var result = 0;
+			var num = this._calculateAbsoluteTileNumber(level,x,y);
+			result = Math.floor(num/256);
+			return  this.tilesUrl + 'TileGroup' + result + '/' + level + '-' + x + '-' + y + '.jpg';
+      
+    },          
+  });
+	
+}( OpenSeadragon ));