dfb631a08f
This massively reduces the number of temporary ol.TileCoord objects. Previously an ol.TileCoord object was generated for every potentially visible tile at the current zoom level and lower, every frame. This commit eliminates all of those. Now new ol.TileCoord objects are only allocated when a new tile is created.
278 lines
8.4 KiB
JavaScript
278 lines
8.4 KiB
JavaScript
goog.provide('ol.test.source.TileSource');
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describe('ol.source.TileSource', function() {
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describe('constructor', function() {
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it('returns a tile source', function() {
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var source = new ol.source.TileSource({
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projection: ol.projection.get('EPSG:4326')
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});
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expect(source).to.be.a(ol.source.Source);
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expect(source).to.be.a(ol.source.TileSource);
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});
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});
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describe('#findLoadedTiles()', function() {
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it('adds no tiles if none are already loaded', function() {
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// a source with no loaded tiles
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var source = new ol.test.source.MockTileSource({});
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var loadedTilesByZ = {};
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var grid = source.getTileGrid();
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var range = grid.getTileRangeForExtentAndZ(source.getExtent(), 3);
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function getTileIfLoaded(z, x, y) {
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var tile = source.getTileZXY(z, x, y, null, null);
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return (!goog.isNull(tile) && tile.getState() === ol.TileState.LOADED) ?
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tile : null;
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}
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source.findLoadedTiles(loadedTilesByZ, getTileIfLoaded, 3, range);
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var keys = goog.object.getKeys(loadedTilesByZ);
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expect(keys.length).to.be(0);
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});
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it('adds loaded tiles to the lookup (z: 0)', function() {
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// a source with no loaded tiles
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var source = new ol.test.source.MockTileSource({
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'0/0/0': true,
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'1/0/0': true
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});
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var loadedTilesByZ = {};
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var grid = source.getTileGrid();
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var range = grid.getTileRangeForExtentAndZ(source.getExtent(), 0);
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function getTileIfLoaded(z, x, y) {
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var tile = source.getTileZXY(z, x, y, null, null);
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return (!goog.isNull(tile) && tile.getState() === ol.TileState.LOADED) ?
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tile : null;
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}
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source.findLoadedTiles(loadedTilesByZ, getTileIfLoaded, 0, range);
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var keys = goog.object.getKeys(loadedTilesByZ);
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expect(keys.length).to.be(1);
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var tile = loadedTilesByZ['0']['0/0/0'];
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expect(tile).to.be.a(ol.Tile);
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expect(tile.state).to.be(ol.TileState.LOADED);
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});
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it('adds loaded tiles to the lookup (z: 1)', function() {
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// a source with no loaded tiles
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var source = new ol.test.source.MockTileSource({
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'0/0/0': true,
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'1/0/0': true
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});
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var loadedTilesByZ = {};
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var grid = source.getTileGrid();
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var range = grid.getTileRangeForExtentAndZ(source.getExtent(), 1);
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function getTileIfLoaded(z, x, y) {
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var tile = source.getTileZXY(z, x, y, null, null);
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return (!goog.isNull(tile) && tile.getState() === ol.TileState.LOADED) ?
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tile : null;
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}
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source.findLoadedTiles(loadedTilesByZ, getTileIfLoaded, 1, range);
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var keys = goog.object.getKeys(loadedTilesByZ);
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expect(keys.length).to.be(1);
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var tile = loadedTilesByZ['1']['1/0/0'];
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expect(tile).to.be.a(ol.Tile);
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expect(tile.state).to.be(ol.TileState.LOADED);
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});
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it('returns true when all tiles are already loaded', function() {
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// a source with no loaded tiles
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var source = new ol.test.source.MockTileSource({
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'1/0/0': true,
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'1/0/1': true,
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'1/1/0': true,
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'1/1/1': true
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});
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var loadedTilesByZ = {};
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var grid = source.getTileGrid();
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var range = grid.getTileRangeForExtentAndZ(source.getExtent(), 1);
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function getTileIfLoaded(z, x, y) {
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var tile = source.getTileZXY(z, x, y, null, null);
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return (!goog.isNull(tile) && tile.getState() === ol.TileState.LOADED) ?
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tile : null;
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}
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var loaded = source.findLoadedTiles(
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loadedTilesByZ, getTileIfLoaded, 1, range);
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expect(loaded).to.be(true);
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});
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it('returns true when all tiles are already loaded (part 2)', function() {
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// a source with no loaded tiles
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var source = new ol.test.source.MockTileSource({});
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var loadedTilesByZ = {
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'1': {
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'1/0/0': true,
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'1/0/1': true,
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'1/1/0': true,
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'1/1/1': true,
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'1/1/2': true
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}
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};
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var grid = source.getTileGrid();
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var range = grid.getTileRangeForExtentAndZ(source.getExtent(), 1);
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function getTileIfLoaded(z, x, y) {
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var tile = source.getTileZXY(z, x, y, null, null);
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return (!goog.isNull(tile) && tile.getState() === ol.TileState.LOADED) ?
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tile : null;
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}
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var loaded = source.findLoadedTiles(
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loadedTilesByZ, getTileIfLoaded, 1, range);
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expect(loaded).to.be(true);
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});
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it('returns false when all tiles are already loaded', function() {
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// a source with no loaded tiles
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var source = new ol.test.source.MockTileSource({
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'1/0/0': true,
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'1/0/1': true,
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'1/1/0': true,
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'1/1/1': false
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});
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var loadedTilesByZ = {};
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var grid = source.getTileGrid();
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var range = grid.getTileRangeForExtentAndZ(source.getExtent(), 1);
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function getTileIfLoaded(z, x, y) {
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var tile = source.getTileZXY(z, x, y, null, null);
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return (!goog.isNull(tile) && tile.getState() === ol.TileState.LOADED) ?
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tile : null;
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}
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var loaded = source.findLoadedTiles(
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loadedTilesByZ, getTileIfLoaded, 1, range);
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expect(loaded).to.be(false);
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});
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it('returns false when all tiles are already loaded (part 2)', function() {
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// a source with no loaded tiles
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var source = new ol.test.source.MockTileSource({});
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var loadedTilesByZ = {
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'1': {
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'1/0/0': true,
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'1/0/1': true,
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'1/1/0': true,
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'1/1/1': false
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}
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};
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var grid = source.getTileGrid();
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var range = grid.getTileRangeForExtentAndZ(source.getExtent(), 1);
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function getTileIfLoaded(z, x, y) {
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var tile = source.getTileZXY(z, x, y, null, null);
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return (!goog.isNull(tile) && tile.getState() === ol.TileState.LOADED) ?
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tile : null;
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}
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var loaded = source.findLoadedTiles(
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loadedTilesByZ, getTileIfLoaded, 1, range);
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expect(loaded).to.be(false);
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});
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});
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});
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/**
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* Tile source for tests that uses a EPSG:4326 based grid with 4 resolutions and
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* 256x256 tiles.
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*
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* @constructor
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* @extends {ol.source.TileSource}
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* @param {Object.<string, boolean>} loaded Lookup of already loaded tiles.
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*/
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ol.test.source.MockTileSource = function(loaded) {
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var extent = new ol.Extent(-180, -180, 180, 180);
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var tileGrid = new ol.tilegrid.TileGrid({
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resolutions: [360 / 256, 180 / 256, 90 / 256, 45 / 256],
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extent: extent,
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origin: new ol.Coordinate(-180, -180),
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tileSize: new ol.Size(256, 256)
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});
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goog.base(this, {
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extent: extent,
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projection: ol.projection.get('EPSG:4326'),
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tileGrid: tileGrid
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});
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/**
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* @type {Object.<string, boolean>}
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* @private
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*/
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this.loaded_ = loaded;
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};
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goog.inherits(ol.test.source.MockTileSource, ol.source.TileSource);
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/**
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* @inheritDoc
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*/
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ol.test.source.MockTileSource.prototype.getTileZXY = function(z, x, y) {
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var key = ol.TileCoord.getKeyZXY(z, x, y);
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var tileState = this.loaded_[key] ? ol.TileState.LOADED : ol.TileState.IDLE;
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return new ol.Tile(new ol.TileCoord(z, x, y), tileState);
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};
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describe('ol.test.source.MockTileSource', function() {
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describe('constructor', function() {
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it('creates a tile source', function() {
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var source = new ol.test.source.MockTileSource({});
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expect(source).to.be.a(ol.source.TileSource);
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expect(source).to.be.a(ol.test.source.MockTileSource);
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});
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});
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describe('#getTileZXY()', function() {
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it('returns a tile with state based on constructor arg', function() {
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var source = new ol.test.source.MockTileSource({
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'0/0/0': true,
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'1/0/0': true
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});
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var tile;
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// check a loaded tile
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tile = source.getTileZXY(0, 0, 0);
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expect(tile).to.be.a(ol.Tile);
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expect(tile.state).to.be(ol.TileState.LOADED);
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// check a tile that is not loaded
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tile = source.getTileZXY(1, 0, -1);
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expect(tile).to.be.a(ol.Tile);
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expect(tile.state).to.be(ol.TileState.IDLE);
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// check another loaded tile
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tile = source.getTileZXY(1, 0, 0);
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expect(tile).to.be.a(ol.Tile);
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expect(tile.state).to.be(ol.TileState.LOADED);
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});
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});
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});
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goog.require('goog.object');
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goog.require('ol.Coordinate');
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goog.require('ol.Extent');
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goog.require('ol.Size');
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goog.require('ol.Tile');
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goog.require('ol.TileCoord');
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goog.require('ol.TileState');
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goog.require('ol.projection');
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goog.require('ol.source.Source');
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goog.require('ol.source.TileSource');
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goog.require('ol.tilegrid.TileGrid');
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