s/TileBounds/TileRange/

2012-09-24 14:33:24 +02:00
parent f8c31ba45c
commit a416d1f601
10 changed files with 320 additions and 320 deletions
--- a/src/ol/layer/xyz.js
+++ b/src/ol/layer/xyz.js
@@ -43,12 +43,12 @@ goog.inherits(ol.tilegrid.XYZ, ol.TileGrid);
 /**
 * @inheritDoc
 */
-ol.tilegrid.XYZ.prototype.forEachTileCoordParentTileBounds =
+ol.tilegrid.XYZ.prototype.forEachTileCoordParentTileRange =
    function(tileCoord, callback, opt_obj) {
  var x = tileCoord.x;
  var y = tileCoord.y;
  var z = tileCoord.z;
-  var tileBounds;
+  var tileRange;
  while (true) {
    z -= 1;
    if (z < 0) {
@@ -56,8 +56,8 @@ ol.tilegrid.XYZ.prototype.forEachTileCoordParentTileBounds =
    }
    x = Math.floor(x / 2);
    y = Math.floor(y / 2);
-    tileBounds = new ol.TileBounds(x, y, x, y);
-    if (callback.call(opt_obj, z, tileBounds)) {
+    tileRange = new ol.TileRange(x, y, x, y);
+    if (callback.call(opt_obj, z, tileRange)) {
      break;
    }
  }
--- a/src/ol/layer/xyz_test.js
+++ b/src/ol/layer/xyz_test.js
@@ -79,51 +79,51 @@ function testXYZCropY() {
 }


-function testXYZTileGridForEachTileCoordParentTileBounds() {
+function testXYZTileGridForEachTileCoordParentTileRange() {

  var xyzTileGrid = new ol.tilegrid.XYZ(6);

  var tileCoord = new ol.TileCoord(5, 11, 21);
-  var zs = [], tileBoundss = [];
-  xyzTileGrid.forEachTileCoordParentTileBounds(
+  var zs = [], tileRanges = [];
+  xyzTileGrid.forEachTileCoordParentTileRange(
      tileCoord,
-      function(z, tileBounds) {
+      function(z, tileRange) {
        zs.push(z);
-        tileBoundss.push(tileBounds);
+        tileRanges.push(tileRange);
        return false;
      });

  assertEquals(5, zs.length);
-  assertEquals(5, tileBoundss.length);
+  assertEquals(5, tileRanges.length);

  assertEquals(4, zs[0]);
-  assertEquals(5, tileBoundss[0].minX);
-  assertEquals(10, tileBoundss[0].minY);
-  assertEquals(5, tileBoundss[0].maxX);
-  assertEquals(10, tileBoundss[0].maxY);
+  assertEquals(5, tileRanges[0].minX);
+  assertEquals(10, tileRanges[0].minY);
+  assertEquals(5, tileRanges[0].maxX);
+  assertEquals(10, tileRanges[0].maxY);

  assertEquals(3, zs[1]);
-  assertEquals(2, tileBoundss[1].minX);
-  assertEquals(5, tileBoundss[1].minY);
-  assertEquals(2, tileBoundss[1].maxX);
-  assertEquals(5, tileBoundss[1].maxY);
+  assertEquals(2, tileRanges[1].minX);
+  assertEquals(5, tileRanges[1].minY);
+  assertEquals(2, tileRanges[1].maxX);
+  assertEquals(5, tileRanges[1].maxY);

  assertEquals(2, zs[2]);
-  assertEquals(1, tileBoundss[2].minX);
-  assertEquals(2, tileBoundss[2].minY);
-  assertEquals(1, tileBoundss[2].maxX);
-  assertEquals(2, tileBoundss[2].maxY);
+  assertEquals(1, tileRanges[2].minX);
+  assertEquals(2, tileRanges[2].minY);
+  assertEquals(1, tileRanges[2].maxX);
+  assertEquals(2, tileRanges[2].maxY);

  assertEquals(1, zs[3]);
-  assertEquals(0, tileBoundss[3].minX);
-  assertEquals(1, tileBoundss[3].minY);
-  assertEquals(0, tileBoundss[3].maxX);
-  assertEquals(1, tileBoundss[3].maxY);
+  assertEquals(0, tileRanges[3].minX);
+  assertEquals(1, tileRanges[3].minY);
+  assertEquals(0, tileRanges[3].maxX);
+  assertEquals(1, tileRanges[3].maxY);

  assertEquals(0, zs[4]);
-  assertEquals(0, tileBoundss[4].minX);
-  assertEquals(0, tileBoundss[4].minY);
-  assertEquals(0, tileBoundss[4].maxX);
-  assertEquals(0, tileBoundss[4].maxY);
+  assertEquals(0, tileRanges[4].minX);
+  assertEquals(0, tileRanges[4].minY);
+  assertEquals(0, tileRanges[4].maxX);
+  assertEquals(0, tileRanges[4].maxY);

 }
--- a/src/ol/renderer/dom/tilelayer.js
+++ b/src/ol/renderer/dom/tilelayer.js
@@ -63,19 +63,19 @@ ol.renderer.dom.TileLayer.prototype.getTileOffset_ = function(z, resolution) {
 /**
 * Get rid of tiles outside the rendered extent.
 * @private
- * @param {ol.TileBounds} tileBounds Tile bounds.
+ * @param {ol.TileRange} tileRange Tile range.
 * @param {number} z Z.
 */
 ol.renderer.dom.TileLayer.prototype.removeInvisibleTiles_ = function(
-    tileBounds, z) {
+    tileRange, z) {
  var key, tileCoord, prune, tile;
  for (key in this.renderedTiles_) {
    tileCoord = ol.TileCoord.createFromString(key);
    prune = z !== tileCoord.z ||
-            tileCoord.x < tileBounds.minX ||
-            tileCoord.x > tileBounds.maxX ||
-            tileCoord.y < tileBounds.minY ||
-            tileCoord.y > tileBounds.maxY;
+            tileCoord.x < tileRange.minX ||
+            tileCoord.x > tileRange.maxX ||
+            tileCoord.y < tileRange.minY ||
+            tileCoord.y > tileRange.maxY;
    if (prune) {
      tile = this.renderedTiles_[key];
      delete this.renderedTiles_[key];
@@ -109,14 +109,14 @@ ol.renderer.dom.TileLayer.prototype.render = function() {
  // z represents the "best" resolution
  var z = tileGrid.getZForResolution(mapResolution);

-  var tileBounds =
-      tileGrid.getTileBoundsForExtentAndResolution(mapExtent, mapResolution);
+  var tileRange =
+      tileGrid.getTileRangeForExtentAndResolution(mapExtent, mapResolution);
  var tileOffset = this.getTileOffset_(z, mapResolution);

  var fragment = document.createDocumentFragment();

  var key, tile, pixelBounds, img, newTiles = false;
-  tileBounds.forEachTileCoord(z, function(tileCoord) {
+  tileRange.forEachTileCoord(z, function(tileCoord) {
    key = tileCoord.toString();
    tile = this.renderedTiles_[key];
    if (!goog.isDef(tile)) {
@@ -143,6 +143,6 @@ ol.renderer.dom.TileLayer.prototype.render = function() {
    goog.dom.appendChild(this.target, fragment);
  }

-  this.removeInvisibleTiles_(tileBounds, z);
+  this.removeInvisibleTiles_(tileRange, z);
  this.renderedMapResolution_ = mapResolution;
 };
--- a/src/ol/renderer/webgl/tilelayer.js
+++ b/src/ol/renderer/webgl/tilelayer.js
@@ -308,22 +308,22 @@ ol.renderer.webgl.TileLayer.prototype.render = function() {
  var tileGrid = tileStore.getTileGrid();
  var z = tileGrid.getZForResolution(mapResolution);
  var tileResolution = tileGrid.getResolution(z);
-  var tileBounds = tileGrid.getTileBoundsForExtentAndResolution(
+  var tileRange = tileGrid.getTileRangeForExtentAndResolution(
      mapRotatedExtent, tileResolution);
-  var tileBoundsSize = tileBounds.getSize();
+  var tileRangeSize = tileRange.getSize();
  var tileSize = tileGrid.getTileSize();

  var maxDimension = Math.max(
-      tileBoundsSize.width * tileSize.width,
-      tileBoundsSize.height * tileSize.height);
+      tileRangeSize.width * tileSize.width,
+      tileRangeSize.height * tileSize.height);
  var framebufferDimension =
      Math.pow(2, Math.ceil(Math.log(maxDimension) / Math.log(2)));
  var framebufferExtentSize = new ol.Size(
      tileResolution * framebufferDimension,
      tileResolution * framebufferDimension);
  var origin = tileGrid.getOrigin(z);
-  var minX = origin.x + tileBounds.minX * tileSize.width * tileResolution;
-  var minY = origin.y + tileBounds.minY * tileSize.height * tileResolution;
+  var minX = origin.x + tileRange.minX * tileSize.width * tileResolution;
+  var minY = origin.y + tileRange.minY * tileSize.height * tileResolution;
  var framebufferExtent = new ol.Extent(
      minX,
      minY,
@@ -382,7 +382,7 @@ ol.renderer.webgl.TileLayer.prototype.render = function() {
  var imagesToLoad = [];

  tilesToDrawByZ[z] = {};
-  tileBounds.forEachTileCoord(z, function(tileCoord) {
+  tileRange.forEachTileCoord(z, function(tileCoord) {

    var tile = tileStore.getTile(tileCoord);

@@ -405,11 +405,11 @@ ol.renderer.webgl.TileLayer.prototype.render = function() {
    }

    // FIXME this could be more efficient about filling partial holes
-    tileGrid.forEachTileCoordParentTileBounds(
+    tileGrid.forEachTileCoordParentTileRange(
        tileCoord,
-        function(z, tileBounds) {
+        function(z, tileRange) {
          var fullyCovered = true;
-          tileBounds.forEachTileCoord(z, function(tileCoord) {
+          tileRange.forEachTileCoord(z, function(tileCoord) {
            var tileCoordKey = tileCoord.toString();
            if (tilesToDrawByZ[z] && tilesToDrawByZ[z][tileCoordKey]) {
              return;
--- a/src/ol/tilebounds.js
+++ b/src/ol/tilebounds.js
@@ -1,113 +0,0 @@
-goog.provide('ol.TileBounds');
-
-goog.require('goog.asserts');
-goog.require('ol.Rectangle');
-goog.require('ol.TileCoord');
-
-
-
-/**
- * @constructor
- * @extends {ol.Rectangle}
- * @param {number} minX Minimum X.
- * @param {number} minY Minimum Y.
- * @param {number} maxX Maximum X.
- * @param {number} maxY Maximum Y.
- */
-ol.TileBounds = function(minX, minY, maxX, maxY) {
-  goog.base(this, minX, minY, maxX, maxY);
-};
-goog.inherits(ol.TileBounds, ol.Rectangle);
-
-
-/**
- * @param {...ol.TileCoord} var_args Tile coordinates.
- * @return {!ol.TileBounds} Bounding tile box.
- */
-ol.TileBounds.boundingTileBounds = function(var_args) {
-  var tileCoord0 = arguments[0];
-  var tileBounds = new ol.TileBounds(tileCoord0.x, tileCoord0.y,
-                                     tileCoord0.x, tileCoord0.y);
-  var i;
-  for (i = 1; i < arguments.length; ++i) {
-    var tileCoord = arguments[i];
-    goog.asserts.assert(tileCoord.z == tileCoord0.z);
-    tileBounds.minX = Math.min(tileBounds.minX, tileCoord.x);
-    tileBounds.minY = Math.min(tileBounds.minY, tileCoord.y);
-    tileBounds.maxX = Math.max(tileBounds.maxX, tileCoord.x);
-    tileBounds.maxY = Math.max(tileBounds.maxY, tileCoord.y);
-  }
-  return tileBounds;
-};
-
-
-/**
- * @return {ol.TileBounds} Clone.
- */
-ol.TileBounds.prototype.clone = function() {
-  return new ol.TileBounds(this.minX, this.minY, this.maxX, this.maxY);
-};
-
-
-/**
- * @param {ol.TileCoord} tileCoord Tile coordinate.
- * @return {boolean} Contains tile coordinate.
- */
-ol.TileBounds.prototype.contains = function(tileCoord) {
-  return this.minX <= tileCoord.x && tileCoord.x <= this.maxX &&
-      this.minY <= tileCoord.y && tileCoord.y <= this.maxY;
-};
-
-
-/**
- * @param {ol.TileBounds} tileBounds Tile bounds.
- * @return {boolean} Contains.
- */
-ol.TileBounds.prototype.containsTileBounds = function(tileBounds) {
-  return this.minX <= tileBounds.minX && tileBounds.maxX <= this.maxX &&
-      this.minY <= tileBounds.minY && tileBounds.minY <= this.maxY;
-};
-
-
-/**
- * @param {ol.TileBounds} tileBounds Tile bounds.
- * @return {boolean} Equals.
- */
-ol.TileBounds.prototype.equals = function(tileBounds) {
-  return this.minX == tileBounds.minX && tileBounds.maxX == this.maxX &&
-      this.minY == tileBounds.minY && tileBounds.minY == this.minY;
-};
-
-
-/**
- * @param {number} z Z.
- * @param {function(this: T, ol.TileCoord)} f Callback.
- * @param {T=} opt_obj The object to be used for the value of 'this' within f.
- * @template T
- */
-ol.TileBounds.prototype.forEachTileCoord = function(z, f, opt_obj) {
-  var x, y;
-  for (x = this.minX; x <= this.maxX; ++x) {
-    for (y = this.minY; y <= this.maxY; ++y) {
-      f.call(opt_obj, new ol.TileCoord(z, x, y));
-    }
-  }
-};
-
-
-/**
- * @inheritDoc
- * @return {number} Height.
- */
-ol.TileBounds.prototype.getHeight = function() {
-  return this.maxY - this.minY + 1;
-};
-
-
-/**
- * @inheritDoc
- * @return {number} Width.
- */
-ol.TileBounds.prototype.getWidth = function() {
-  return this.maxX - this.minX + 1;
-};
--- a/src/ol/tilebounds_test.js
+++ b/src/ol/tilebounds_test.js
@@ -1,102 +0,0 @@
-goog.require('goog.testing.jsunit');
-goog.require('ol.TileBounds');
-
-
-function testClone() {
-  var tileBounds = new ol.TileBounds(1, 2, 3, 4);
-  var clonedTileBounds = tileBounds.clone();
-  assertTrue(clonedTileBounds instanceof ol.TileBounds);
-  assertFalse(clonedTileBounds === tileBounds);
-  assertEquals(tileBounds.minX, clonedTileBounds.minX);
-  assertEquals(tileBounds.minY, clonedTileBounds.minY);
-  assertEquals(tileBounds.maxX, clonedTileBounds.maxX);
-  assertEquals(tileBounds.maxY, clonedTileBounds.maxY);
-}
-
-
-function testContains() {
-  var tileBounds = new ol.TileBounds(1, 1, 3, 3);
-  assertFalse(tileBounds.contains(new ol.TileCoord(0, 0, 0)));
-  assertFalse(tileBounds.contains(new ol.TileCoord(0, 0, 1)));
-  assertFalse(tileBounds.contains(new ol.TileCoord(0, 0, 2)));
-  assertFalse(tileBounds.contains(new ol.TileCoord(0, 0, 3)));
-  assertFalse(tileBounds.contains(new ol.TileCoord(0, 0, 4)));
-  assertFalse(tileBounds.contains(new ol.TileCoord(0, 1, 0)));
-  assertTrue(tileBounds.contains(new ol.TileCoord(0, 1, 1)));
-  assertTrue(tileBounds.contains(new ol.TileCoord(0, 1, 2)));
-  assertTrue(tileBounds.contains(new ol.TileCoord(0, 1, 3)));
-  assertFalse(tileBounds.contains(new ol.TileCoord(0, 1, 4)));
-  assertFalse(tileBounds.contains(new ol.TileCoord(0, 2, 0)));
-  assertTrue(tileBounds.contains(new ol.TileCoord(0, 2, 1)));
-  assertTrue(tileBounds.contains(new ol.TileCoord(0, 2, 2)));
-  assertTrue(tileBounds.contains(new ol.TileCoord(0, 2, 3)));
-  assertFalse(tileBounds.contains(new ol.TileCoord(0, 2, 4)));
-  assertFalse(tileBounds.contains(new ol.TileCoord(0, 3, 0)));
-  assertTrue(tileBounds.contains(new ol.TileCoord(0, 3, 1)));
-  assertTrue(tileBounds.contains(new ol.TileCoord(0, 3, 2)));
-  assertTrue(tileBounds.contains(new ol.TileCoord(0, 3, 3)));
-  assertFalse(tileBounds.contains(new ol.TileCoord(0, 3, 4)));
-  assertFalse(tileBounds.contains(new ol.TileCoord(0, 4, 0)));
-  assertFalse(tileBounds.contains(new ol.TileCoord(0, 4, 1)));
-  assertFalse(tileBounds.contains(new ol.TileCoord(0, 4, 2)));
-  assertFalse(tileBounds.contains(new ol.TileCoord(0, 4, 3)));
-  assertFalse(tileBounds.contains(new ol.TileCoord(0, 4, 4)));
-}
-
-
-function testBoundingTileBounds() {
-  var tileBounds = new ol.TileBounds.boundingTileBounds(
-      new ol.TileCoord(3, 1, 3),
-      new ol.TileCoord(3, 2, 0));
-  assertEquals(1, tileBounds.minX);
-  assertEquals(0, tileBounds.minY);
-  assertEquals(2, tileBounds.maxX);
-  assertEquals(3, tileBounds.maxY);
-}
-
-
-function testBoundingTileBoundsMixedZ() {
-  assertThrows(function() {
-    var tileBounds = new ol.TileBounds.boundingTileBounds(
-        new ol.TileCoord(3, 1, 3),
-        new ol.TileCoord(4, 2, 0));
-  });
-}
-
-
-function testForEachTileCoord() {
-
-  var tileBounds = new ol.TileBounds(0, 2, 1, 3);
-
-  var tileCoords = [];
-  tileBounds.forEachTileCoord(5, function(tileCoord) {
-    tileCoords.push(tileCoord.clone());
-  });
-
-  assertEquals(4, tileCoords.length);
-
-  assertEquals(5, tileCoords[0].z);
-  assertEquals(0, tileCoords[0].x);
-  assertEquals(2, tileCoords[0].y);
-
-  assertEquals(5, tileCoords[1].z);
-  assertEquals(0, tileCoords[1].x);
-  assertEquals(3, tileCoords[1].y);
-
-  assertEquals(5, tileCoords[2].z);
-  assertEquals(1, tileCoords[2].x);
-  assertEquals(2, tileCoords[2].y);
-
-  assertEquals(5, tileCoords[3].z);
-  assertEquals(1, tileCoords[3].x);
-  assertEquals(3, tileCoords[3].y);
-
-}
-
-
-function testSize() {
-  var tileBounds = new ol.TileBounds(0, 1, 2, 4);
-  var size = tileBounds.getSize();
-  assertEquals(3, size.width);
-  assertEquals(4, size.height);
-}
--- a/src/ol/tilegrid.js
+++ b/src/ol/tilegrid.js
@@ -8,8 +8,8 @@ goog.require('ol.Coordinate');
 goog.require('ol.Extent');
 goog.require('ol.PixelBounds');
 goog.require('ol.Size');
-goog.require('ol.TileBounds');
 goog.require('ol.TileCoord');
+goog.require('ol.TileRange');
 goog.require('ol.array');


@@ -76,18 +76,18 @@ ol.TileGrid = function(resolutions, extent, origin, opt_tileSize) {

 /**
 * @param {ol.TileCoord} tileCoord Tile coordinate.
- * @param {function(this: T, number, ol.TileBounds): boolean} callback
+ * @param {function(this: T, number, ol.TileRange): boolean} callback
 *     Callback.
 * @param {T=} opt_obj Object.
 * @template T
 */
-ol.TileGrid.prototype.forEachTileCoordParentTileBounds =
+ol.TileGrid.prototype.forEachTileCoordParentTileRange =
    function(tileCoord, callback, opt_obj) {
  var tileCoordExtent = this.getTileCoordExtent(tileCoord);
  var z = tileCoord.z - 1;
  while (z >= 0) {
    if (callback.call(
-        opt_obj, z, this.getTileBoundsForExtentAndZ(tileCoordExtent, z))) {
+        opt_obj, z, this.getTileRangeForExtentAndZ(tileCoordExtent, z))) {
      return;
    }
    --z;
@@ -158,17 +158,17 @@ ol.TileGrid.prototype.getResolutions = function() {

 /**
 * @param {number} z Z.
- * @param {ol.TileBounds} tileBounds Tile bounds.
+ * @param {ol.TileRange} tileRange Tile range.
 * @return {ol.Extent} Extent.
 */
-ol.TileGrid.prototype.getTileBoundsExtent = function(z, tileBounds) {
+ol.TileGrid.prototype.getTileRangeExtent = function(z, tileRange) {
  var origin = this.getOrigin(z);
  var resolution = this.getResolution(z);
  var tileSize = this.tileSize_;
-  var minX = origin.x + tileBounds.minX * tileSize.width * resolution;
-  var minY = origin.y + tileBounds.minY * tileSize.height * resolution;
-  var maxX = origin.x + (tileBounds.maxX + 1) * tileSize.width * resolution;
-  var maxY = origin.y + (tileBounds.maxY + 1) * tileSize.height * resolution;
+  var minX = origin.x + tileRange.minX * tileSize.width * resolution;
+  var minY = origin.y + tileRange.minY * tileSize.height * resolution;
+  var maxX = origin.x + (tileRange.maxX + 1) * tileSize.width * resolution;
+  var maxY = origin.y + (tileRange.maxY + 1) * tileSize.height * resolution;
  return new ol.Extent(minX, minY, maxX, maxY);
 };

@@ -176,26 +176,26 @@ ol.TileGrid.prototype.getTileBoundsExtent = function(z, tileBounds) {
 /**
 * @param {ol.Extent} extent Extent.
 * @param {number} resolution Resolution.
- * @return {ol.TileBounds} Tile bounds.
+ * @return {ol.TileRange} Tile range.
 */
-ol.TileGrid.prototype.getTileBoundsForExtentAndResolution = function(
+ol.TileGrid.prototype.getTileRangeForExtentAndResolution = function(
    extent, resolution) {
  var min = this.getTileCoordForCoordAndResolution(
      new ol.Coordinate(extent.minX, extent.minY), resolution);
  var max = this.getTileCoordForCoordAndResolution(
      new ol.Coordinate(extent.maxX, extent.maxY), resolution);
-  return new ol.TileBounds(min.x, min.y, max.x, max.y);
+  return new ol.TileRange(min.x, min.y, max.x, max.y);
 };


 /**
 * @param {ol.Extent} extent Extent.
 * @param {number} z Z.
- * @return {ol.TileBounds} Tile bounds.
+ * @return {ol.TileRange} Tile range.
 */
-ol.TileGrid.prototype.getTileBoundsForExtentAndZ = function(extent, z) {
+ol.TileGrid.prototype.getTileRangeForExtentAndZ = function(extent, z) {
  var resolution = this.getResolution(z);
-  return this.getTileBoundsForExtentAndResolution(extent, resolution);
+  return this.getTileRangeForExtentAndResolution(extent, resolution);
 };


--- a/src/ol/tilegrid_test.js
+++ b/src/ol/tilegrid_test.js
@@ -360,35 +360,35 @@ function testGetTileCoordExtent() {
 }


-function testGetExtentTileBounds() {
+function testGetExtentTileRange() {

  var tileGrid = new ol.TileGrid(resolutions, extent, origin, tileSize);
  var e = new ol.Extent(45000, 5000, 55000, 15000);
-  var tileBounds;
+  var tileRange;

-  tileBounds = tileGrid.getTileBoundsForExtentAndZ(e, 0);
-  assertEquals(0, tileBounds.minY);
-  assertEquals(0, tileBounds.minX);
-  assertEquals(0, tileBounds.maxX);
-  assertEquals(0, tileBounds.maxY);
+  tileRange = tileGrid.getTileRangeForExtentAndZ(e, 0);
+  assertEquals(0, tileRange.minY);
+  assertEquals(0, tileRange.minX);
+  assertEquals(0, tileRange.maxX);
+  assertEquals(0, tileRange.maxY);

-  tileBounds = tileGrid.getTileBoundsForExtentAndZ(e, 1);
-  assertEquals(0, tileBounds.minX);
-  assertEquals(0, tileBounds.minY);
-  assertEquals(1, tileBounds.maxX);
-  assertEquals(0, tileBounds.maxY);
+  tileRange = tileGrid.getTileRangeForExtentAndZ(e, 1);
+  assertEquals(0, tileRange.minX);
+  assertEquals(0, tileRange.minY);
+  assertEquals(1, tileRange.maxX);
+  assertEquals(0, tileRange.maxY);

-  tileBounds = tileGrid.getTileBoundsForExtentAndZ(e, 2);
-  assertEquals(1, tileBounds.minX);
-  assertEquals(0, tileBounds.minY);
-  assertEquals(2, tileBounds.maxX);
-  assertEquals(0, tileBounds.maxY);
+  tileRange = tileGrid.getTileRangeForExtentAndZ(e, 2);
+  assertEquals(1, tileRange.minX);
+  assertEquals(0, tileRange.minY);
+  assertEquals(2, tileRange.maxX);
+  assertEquals(0, tileRange.maxY);

-  tileBounds = tileGrid.getTileBoundsForExtentAndZ(e, 3);
-  assertEquals(4, tileBounds.minX);
-  assertEquals(0, tileBounds.minY);
-  assertEquals(5, tileBounds.maxX);
-  assertEquals(1, tileBounds.maxY);
+  tileRange = tileGrid.getTileRangeForExtentAndZ(e, 3);
+  assertEquals(4, tileRange.minX);
+  assertEquals(0, tileRange.minY);
+  assertEquals(5, tileRange.maxX);
+  assertEquals(1, tileRange.maxY);

 }

@@ -396,36 +396,36 @@ function testGetExtentTileBounds() {
 function testForEachTileCoordParent() {

  var tileGrid = new ol.TileGrid(resolutions, extent, origin, tileSize);
-  var zs = [], tileBoundss = [];
+  var zs = [], tileRanges = [];

-  tileGrid.forEachTileCoordParentTileBounds(
+  tileGrid.forEachTileCoordParentTileRange(
      new ol.TileCoord(3, 7, 3),
-      function(z, tileBounds) {
+      function(z, tileRange) {
        zs.push(z);
-        tileBoundss.push(tileBounds);
+        tileRanges.push(tileRange);
        return false;
      });

  assertEquals(3, zs.length);
-  assertEquals(3, tileBoundss.length);
+  assertEquals(3, tileRanges.length);

  assertEquals(2, zs[0]);
-  assertEquals(2, tileBoundss[0].minX);
-  assertEquals(1, tileBoundss[0].minY);
-  assertEquals(3, tileBoundss[0].maxX);
-  assertEquals(1, tileBoundss[0].maxY);
+  assertEquals(2, tileRanges[0].minX);
+  assertEquals(1, tileRanges[0].minY);
+  assertEquals(3, tileRanges[0].maxX);
+  assertEquals(1, tileRanges[0].maxY);

  assertEquals(1, zs[1]);
-  assertEquals(1, tileBoundss[1].minX);
-  assertEquals(0, tileBoundss[1].minY);
-  assertEquals(1, tileBoundss[1].maxX);
-  assertEquals(0, tileBoundss[1].maxY);
+  assertEquals(1, tileRanges[1].minX);
+  assertEquals(0, tileRanges[1].minY);
+  assertEquals(1, tileRanges[1].maxX);
+  assertEquals(0, tileRanges[1].maxY);

  assertEquals(0, zs[2]);
-  assertEquals(0, tileBoundss[2].minX);
-  assertEquals(0, tileBoundss[2].minY);
-  assertEquals(0, tileBoundss[2].maxX);
-  assertEquals(0, tileBoundss[2].maxY);
+  assertEquals(0, tileRanges[2].minX);
+  assertEquals(0, tileRanges[2].minY);
+  assertEquals(0, tileRanges[2].maxX);
+  assertEquals(0, tileRanges[2].maxY);

 }

--- a/src/ol/tilerange.js
+++ b/src/ol/tilerange.js
@@ -0,0 +1,113 @@
+goog.provide('ol.TileRange');
+
+goog.require('goog.asserts');
+goog.require('ol.Rectangle');
+goog.require('ol.TileCoord');
+
+
+
+/**
+ * @constructor
+ * @extends {ol.Rectangle}
+ * @param {number} minX Minimum X.
+ * @param {number} minY Minimum Y.
+ * @param {number} maxX Maximum X.
+ * @param {number} maxY Maximum Y.
+ */
+ol.TileRange = function(minX, minY, maxX, maxY) {
+  goog.base(this, minX, minY, maxX, maxY);
+};
+goog.inherits(ol.TileRange, ol.Rectangle);
+
+
+/**
+ * @param {...ol.TileCoord} var_args Tile coordinates.
+ * @return {!ol.TileRange} Bounding tile box.
+ */
+ol.TileRange.boundingTileRange = function(var_args) {
+  var tileCoord0 = arguments[0];
+  var tileRange = new ol.TileRange(tileCoord0.x, tileCoord0.y,
+                                   tileCoord0.x, tileCoord0.y);
+  var i;
+  for (i = 1; i < arguments.length; ++i) {
+    var tileCoord = arguments[i];
+    goog.asserts.assert(tileCoord.z == tileCoord0.z);
+    tileRange.minX = Math.min(tileRange.minX, tileCoord.x);
+    tileRange.minY = Math.min(tileRange.minY, tileCoord.y);
+    tileRange.maxX = Math.max(tileRange.maxX, tileCoord.x);
+    tileRange.maxY = Math.max(tileRange.maxY, tileCoord.y);
+  }
+  return tileRange;
+};
+
+
+/**
+ * @return {ol.TileRange} Clone.
+ */
+ol.TileRange.prototype.clone = function() {
+  return new ol.TileRange(this.minX, this.minY, this.maxX, this.maxY);
+};
+
+
+/**
+ * @param {ol.TileCoord} tileCoord Tile coordinate.
+ * @return {boolean} Contains tile coordinate.
+ */
+ol.TileRange.prototype.contains = function(tileCoord) {
+  return this.minX <= tileCoord.x && tileCoord.x <= this.maxX &&
+      this.minY <= tileCoord.y && tileCoord.y <= this.maxY;
+};
+
+
+/**
+ * @param {ol.TileRange} tileRange Tile range.
+ * @return {boolean} Contains.
+ */
+ol.TileRange.prototype.containsTileRange = function(tileRange) {
+  return this.minX <= tileRange.minX && tileRange.maxX <= this.maxX &&
+      this.minY <= tileRange.minY && tileRange.minY <= this.maxY;
+};
+
+
+/**
+ * @param {ol.TileRange} tileRange Tile range.
+ * @return {boolean} Equals.
+ */
+ol.TileRange.prototype.equals = function(tileRange) {
+  return this.minX == tileRange.minX && tileRange.maxX == this.maxX &&
+      this.minY == tileRange.minY && tileRange.minY == this.minY;
+};
+
+
+/**
+ * @param {number} z Z.
+ * @param {function(this: T, ol.TileCoord)} f Callback.
+ * @param {T=} opt_obj The object to be used for the value of 'this' within f.
+ * @template T
+ */
+ol.TileRange.prototype.forEachTileCoord = function(z, f, opt_obj) {
+  var x, y;
+  for (x = this.minX; x <= this.maxX; ++x) {
+    for (y = this.minY; y <= this.maxY; ++y) {
+      f.call(opt_obj, new ol.TileCoord(z, x, y));
+    }
+  }
+};
+
+
+/**
+ * @inheritDoc
+ * @return {number} Height.
+ */
+ol.TileRange.prototype.getHeight = function() {
+  return this.maxY - this.minY + 1;
+};
+
+
+/**
+ * @inheritDoc
+ * @return {number} Width.
+ */
+ol.TileRange.prototype.getWidth = function() {
+  return this.maxX - this.minX + 1;
+};
--- a/src/ol/tilerange_test.js
+++ b/src/ol/tilerange_test.js
@@ -0,0 +1,102 @@
+goog.require('goog.testing.jsunit');
+goog.require('ol.TileRange');
+
+
+function testClone() {
+  var tileRange = new ol.TileRange(1, 2, 3, 4);
+  var clonedTileRange = tileRange.clone();
+  assertTrue(clonedTileRange instanceof ol.TileRange);
+  assertFalse(clonedTileRange === tileRange);
+  assertEquals(tileRange.minX, clonedTileRange.minX);
+  assertEquals(tileRange.minY, clonedTileRange.minY);
+  assertEquals(tileRange.maxX, clonedTileRange.maxX);
+  assertEquals(tileRange.maxY, clonedTileRange.maxY);
+}
+
+
+function testContains() {
+  var tileRange = new ol.TileRange(1, 1, 3, 3);
+  assertFalse(tileRange.contains(new ol.TileCoord(0, 0, 0)));
+  assertFalse(tileRange.contains(new ol.TileCoord(0, 0, 1)));
+  assertFalse(tileRange.contains(new ol.TileCoord(0, 0, 2)));
+  assertFalse(tileRange.contains(new ol.TileCoord(0, 0, 3)));
+  assertFalse(tileRange.contains(new ol.TileCoord(0, 0, 4)));
+  assertFalse(tileRange.contains(new ol.TileCoord(0, 1, 0)));
+  assertTrue(tileRange.contains(new ol.TileCoord(0, 1, 1)));
+  assertTrue(tileRange.contains(new ol.TileCoord(0, 1, 2)));
+  assertTrue(tileRange.contains(new ol.TileCoord(0, 1, 3)));
+  assertFalse(tileRange.contains(new ol.TileCoord(0, 1, 4)));
+  assertFalse(tileRange.contains(new ol.TileCoord(0, 2, 0)));
+  assertTrue(tileRange.contains(new ol.TileCoord(0, 2, 1)));
+  assertTrue(tileRange.contains(new ol.TileCoord(0, 2, 2)));
+  assertTrue(tileRange.contains(new ol.TileCoord(0, 2, 3)));
+  assertFalse(tileRange.contains(new ol.TileCoord(0, 2, 4)));
+  assertFalse(tileRange.contains(new ol.TileCoord(0, 3, 0)));
+  assertTrue(tileRange.contains(new ol.TileCoord(0, 3, 1)));
+  assertTrue(tileRange.contains(new ol.TileCoord(0, 3, 2)));
+  assertTrue(tileRange.contains(new ol.TileCoord(0, 3, 3)));
+  assertFalse(tileRange.contains(new ol.TileCoord(0, 3, 4)));
+  assertFalse(tileRange.contains(new ol.TileCoord(0, 4, 0)));
+  assertFalse(tileRange.contains(new ol.TileCoord(0, 4, 1)));
+  assertFalse(tileRange.contains(new ol.TileCoord(0, 4, 2)));
+  assertFalse(tileRange.contains(new ol.TileCoord(0, 4, 3)));
+  assertFalse(tileRange.contains(new ol.TileCoord(0, 4, 4)));
+}
+
+
+function testBoundingTileRange() {
+  var tileRange = new ol.TileRange.boundingTileRange(
+      new ol.TileCoord(3, 1, 3),
+      new ol.TileCoord(3, 2, 0));
+  assertEquals(1, tileRange.minX);
+  assertEquals(0, tileRange.minY);
+  assertEquals(2, tileRange.maxX);
+  assertEquals(3, tileRange.maxY);
+}
+
+
+function testBoundingTileRangeMixedZ() {
+  assertThrows(function() {
+    var tileRange = new ol.TileRange.boundingTileRange(
+        new ol.TileCoord(3, 1, 3),
+        new ol.TileCoord(4, 2, 0));
+  });
+}
+
+
+function testForEachTileCoord() {
+
+  var tileRange = new ol.TileRange(0, 2, 1, 3);
+
+  var tileCoords = [];
+  tileRange.forEachTileCoord(5, function(tileCoord) {
+    tileCoords.push(tileCoord.clone());
+  });
+
+  assertEquals(4, tileCoords.length);
+
+  assertEquals(5, tileCoords[0].z);
+  assertEquals(0, tileCoords[0].x);
+  assertEquals(2, tileCoords[0].y);
+
+  assertEquals(5, tileCoords[1].z);
+  assertEquals(0, tileCoords[1].x);
+  assertEquals(3, tileCoords[1].y);
+
+  assertEquals(5, tileCoords[2].z);
+  assertEquals(1, tileCoords[2].x);
+  assertEquals(2, tileCoords[2].y);
+
+  assertEquals(5, tileCoords[3].z);
+  assertEquals(1, tileCoords[3].x);
+  assertEquals(3, tileCoords[3].y);
+
+}
+
+
+function testSize() {
+  var tileRange = new ol.TileRange(0, 1, 2, 4);
+  var size = tileRange.getSize();
+  assertEquals(3, size.width);
+  assertEquals(4, size.height);
+}