openlayers
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Build tools and sources for developing OpenLayers based mapping applications
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JavaScript
goog.provide('ol.test.rendering.reproj.Tile');
goog.require('ol.Tile');
goog.require('ol.events');
goog.require('ol.proj');
goog.require('ol.reproj.Tile');
goog.require('ol.source.XYZ');
goog.require('ol.tilegrid');
describe('ol.rendering.reproj.Tile', function() {
function testSingleTile(source, targetProjection, targetTileGrid, z, x, y,
pixelRatio, expectedUrl, expectedRequests, done) {
var sourceProjection = source.getProjection();
var sourceGutter = source.getGutter(sourceProjection);
var tilesRequested = 0;
var tile = new ol.reproj.Tile(sourceProjection, source.getTileGrid(),
ol.proj.get(targetProjection), targetTileGrid,
[z, x, y], null, pixelRatio, sourceGutter,
function(z, x, y, pixelRatio) {
tilesRequested++;
return source.getTile(z, x, y, pixelRatio, sourceProjection);
});
if (tile.getState() == ol.Tile.State.IDLE) {
ol.events.listen(tile, 'change', function(e) {
if (tile.getState() == ol.Tile.State.LOADED) {
expect(tilesRequested).to.be(expectedRequests);
resembleCanvas(tile.getImage(), expectedUrl, 7.5, done);
}
});
tile.load();
}
}
var source;
describe('single tile reprojections from EPSG:3857', function() {
beforeEach(function() {
source = new ol.source.XYZ({
projection: 'EPSG:3857',
url: 'spec/ol/data/tiles/osm/{z}/{x}/{y}.png'
});
});
it('works for identity reprojection', function(done) {
testSingleTile(source, 'EPSG:3857', source.getTileGrid(), 5, 5, -13, 1,
'spec/ol/data/tiles/osm/5/5/12.png', 1, done);
});
it('to EPSG:4326', function(done) {
var tileGrid = ol.tilegrid.createForProjection('EPSG:4326', 7, [64, 64]);
testSingleTile(source, 'EPSG:4326', tileGrid, 7, 21, -20, 1,
'spec/ol/reproj/expected/osm4326.png', 1, done);
});
it('to EPSG:5070', function(done) {
proj4.defs('EPSG:5070',
'+proj=aea +lat_1=29.5 +lat_2=45.5 +lat_0=23 +lon_0=-96 +x_0=0 ' +
'+y_0=0 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=m +no_defs');
var proj5070 = ol.proj.get('EPSG:5070');
proj5070.setExtent([-6e6, 0, 4e6, 6e6]);
var tileGrid = ol.tilegrid.createForProjection('EPSG:5070', 5, [64, 64]);
testSingleTile(source, 'EPSG:5070', tileGrid, 5, 13, -15, 1,
'spec/ol/reproj/expected/osm5070.png', 1, done);
});
it('to ESRI:54009', function(done) {
proj4.defs('ESRI:54009',
'+proj=moll +lon_0=0 +x_0=0 +y_0=0 +datum=WGS84 +units=m +no_defs');
var proj54009 = ol.proj.get('ESRI:54009');
proj54009.setExtent([-18e6, -9e6, 18e6, 9e6]);
var tileGrid = ol.tilegrid.createForProjection('ESRI:54009', 7, [64, 64]);
testSingleTile(source, 'ESRI:54009', tileGrid, 7, 27, -16, 1,
'spec/ol/reproj/expected/osm54009.png', 1, done);
});
});
describe('stitching several tiles from EPSG:3857', function() {
beforeEach(function() {
source = new ol.source.XYZ({
projection: 'EPSG:3857',
url: 'spec/ol/data/tiles/osm/{z}/{x}/{y}.png'
});
});
it('to EPSG:4326', function(done) {
var tileGrid = ol.tilegrid.createForProjection('EPSG:4326', 7, [64, 64]);
testSingleTile(source, 'EPSG:4326', tileGrid, 7, 23, -21, 1,
'spec/ol/reproj/expected/stitch-osm4326.png', 2, done);
});
it('to EPSG:3740', function(done) {
proj4.defs('EPSG:3740',
'+proj=utm +zone=10 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 ' +
'+units=m +no_defs');
var proj3740 = ol.proj.get('EPSG:3740');
proj3740.setExtent([318499.05, 2700792.39, 4359164.89, 7149336.98]);
var tileGrid = ol.tilegrid.createForProjection('EPSG:3740', 4, [64, 64]);
testSingleTile(source, 'EPSG:3740', tileGrid, 4, 4, -13, 1,
'spec/ol/reproj/expected/stitch-osm3740.png', 4, done);
});
});
describe('tile projection from EPSG:4326', function() {
beforeEach(function() {
source = new ol.source.XYZ({
projection: 'EPSG:4326',
maxZoom: 0,
url: 'spec/ol/data/tiles/4326/{z}/{x}/{y}.png'
});
});
it('works for identity reprojection', function(done) {
testSingleTile(source, 'EPSG:4326', source.getTileGrid(), 0, 0, -1, 1,
'spec/ol/data/tiles/4326/0/0/0.png', 1, done);
});
it('to EPSG:3857', function(done) {
var tileGrid = ol.tilegrid.createForProjection('EPSG:3857', 0, [64, 64]);
testSingleTile(source, 'EPSG:3857', tileGrid, 0, 0, -1, 1,
'spec/ol/reproj/expected/4326-to-3857.png', 1, done);
});
});
describe('non-square source tiles', function() {
beforeEach(function() {
source = new ol.source.XYZ({
projection: 'EPSG:3857',
url: 'spec/ol/data/tiles/osm-512x256/{z}/{x}/{y}.png',
tileSize: [512, 256]
});
});
it('works for identity reprojection', function(done) {
testSingleTile(source, 'EPSG:3857', source.getTileGrid(), 5, 3, -13, 1,
'spec/ol/data/tiles/osm-512x256/5/3/12.png', 1, done);
});
it('to 64x128 EPSG:4326', function(done) {
var tileGrid = ol.tilegrid.createForProjection('EPSG:4326', 7, [64, 128]);
testSingleTile(source, 'EPSG:4326', tileGrid, 7, 27, -10, 1,
'spec/ol/reproj/expected/512x256-to-64x128.png', 1, done);
});
});
describe('dateline wrapping', function() {
beforeEach(function() {
source = new ol.source.XYZ({
projection: 'EPSG:4326',
maxZoom: 0,
url: 'spec/ol/data/tiles/4326/{z}/{x}/{y}.png'
});
});
it('wraps X when prime meridian is shifted', function(done) {
proj4.defs('merc_180', '+proj=merc +lon_0=180 +units=m +no_defs');
var proj_ = ol.proj.get('merc_180');
proj_.setExtent([-20026376.39, -20048966.10, 20026376.39, 20048966.10]);
var tileGrid = ol.tilegrid.createForProjection('merc_180', 0, [64, 64]);
testSingleTile(source, 'merc_180', tileGrid, 0, 0, -1, 1,
'spec/ol/reproj/expected/dateline-merc-180.png', 2, done);
});
it('displays north pole correctly (EPSG:3413)', function(done) {
proj4.defs('EPSG:3413', '+proj=stere +lat_0=90 +lat_ts=70 +lon_0=-45 ' +
'+k=1 +x_0=0 +y_0=0 +datum=WGS84 +units=m +no_defs');
var proj3413 = ol.proj.get('EPSG:3413');
proj3413.setExtent([-4194304, -4194304, 4194304, 4194304]);
var tileGrid = ol.tilegrid.createForProjection('EPSG:3413', 0, [64, 64]);
testSingleTile(source, 'EPSG:3413', tileGrid, 0, 0, -1, 1,
'spec/ol/reproj/expected/dateline-pole.png', 2, done);
});
});
});