Add Zoomify stuff

src/ol/source/zoomifysource.exports

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+@exportClass ol.source.Zoomify ol.source.ZoomifyOptions

src/ol/source/zoomifysource.js

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+goog.provide('ol.source.Zoomify');
+
+goog.require('goog.array');
+goog.require('ol.TileCoord');
+goog.require('ol.TileUrlFunction');
+goog.require('ol.proj');
+goog.require('ol.source.TileImage');
+goog.require('ol.tilegrid.Zoomify');
+
+
+
+/**
+ * @constructor
+ * @extends {ol.source.TileImage}
+ * @param {ol.source.ZoomifyOptions} options Zoomify options.
+ * @todo stability experimental
+ */
+ol.source.Zoomify = function(options) {
+
+  /**
+   * Prefix of URL template.
+   * @private
+   * @type {!string}
+   */
+  this.url_ = options.url;
+
+  /**
+   * Size of the image.
+   * @private
+   * @type {ol.Size}
+   */
+  this.size_ = options.size;
+
+  /**
+   * Depth of the Zoomify pyramid, number of tiers (zoom levels).
+   * @private
+   * @type {number}
+   */
+  this.numberOfTiers_ = 0;
+
+  /**
+   * Number of tiles up to the given tier of pyramid.
+   * @private
+   * @type {Array.<number>}
+   */
+  this.tileCountUpToTier_ = null;
+
+  /**
+   * Size (in tiles) for each tier of pyramid.
+   * @private
+   * @type {Array.<ol.Size>}
+   */
+  this.tierSizeInTiles_ = null;
+
+  /**
+   * Image size in pixels for each pyramid tier.
+   * @private
+   * @type {Array.<ol.Size>}
+   */
+  this.tierImageSize_ = null;
+
+  var imageSize = [].concat(this.size_);
+  var tiles = [
+    Math.ceil(this.size_[0] / ol.DEFAULT_TILE_SIZE),
+    Math.ceil(this.size_[1] / ol.DEFAULT_TILE_SIZE)
+  ];
+  this.tierSizeInTiles_ = [tiles];
+  this.tierImageSize_ = [imageSize];
+
+  while (imageSize[0] > ol.DEFAULT_TILE_SIZE ||
+      imageSize[1] > ol.DEFAULT_TILE_SIZE) {
+
+    imageSize = [
+      Math.floor(imageSize[0] / 2),
+      Math.floor(imageSize[1] / 2)
+    ];
+    tiles = [
+      Math.ceil(imageSize[0] / ol.DEFAULT_TILE_SIZE),
+      Math.ceil(imageSize[1] / ol.DEFAULT_TILE_SIZE)
+    ];
+    this.tierSizeInTiles_.push(tiles);
+    this.tierImageSize_.push(imageSize);
+  }
+
+  this.tierSizeInTiles_.reverse();
+  this.tierImageSize_.reverse();
+  this.numberOfTiers_ = this.tierSizeInTiles_.length;
+  var resolutions = [1];
+  this.tileCountUpToTier_ = [0];
+  for (var i = 1; i < this.numberOfTiers_; i++) {
+    resolutions.unshift(Math.pow(2, i));
+    this.tileCountUpToTier_.push(
+        this.tierSizeInTiles_[i - 1][0] * this.tierSizeInTiles_[i - 1][1] +
+        this.tileCountUpToTier_[i - 1]
+    );
+  }
+
+
+  var createFromUrl = function(url) {
+    var template = url + '{tileIndex}/{z}-{x}-{y}.jpg';
+    return (
+        /**
+         * @this {ol.source.TileImage}
+         * @param {ol.TileCoord} tileCoord Tile Coordinate.
+         * @param {ol.proj.Projection} projection Projection.
+         * @return {string|undefined} Tile URL.
+         */
+        function(tileCoord, projection) {
+          if (goog.isNull(tileCoord)) {
+            return undefined;
+          } else {
+            var tileIndex = tileCoord.x +
+                (tileCoord.y * this.tierSizeInTiles_[tileCoord.z][0]) +
+                this.tileCountUpToTier_[tileCoord.z];
+            return template.replace('{tileIndex}', 'TileGroup' +
+                Math.floor((tileIndex) / ol.DEFAULT_TILE_SIZE))
+                           .replace('{z}', '' + tileCoord.z)
+                           .replace('{x}', '' + tileCoord.x)
+                           .replace('{y}', '' + tileCoord.y);
+          }
+        }
+    );
+  };
+
+  var tileGrid = new ol.tilegrid.Zoomify({
+    resolutions: resolutions
+  });
+  var tileUrlFunction = ol.TileUrlFunction.withTileCoordTransform(
+      tileGrid.createTileCoordTransform(),
+      createFromUrl(this.url_));
+
+
+  goog.base(this, {
+    attributions: options.attributions,
+    crossOrigin: options.crossOrigin,
+    logo: options.logo,
+    tileGrid: tileGrid,
+    tileUrlFunction: tileUrlFunction
+  });
+
+};
+goog.inherits(ol.source.Zoomify, ol.source.TileImage);