61 lines
2.1 KiB
JavaScript
61 lines
2.1 KiB
JavaScript
import {listen} from '../../../../src/ol/events.js';
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import {get as getProjection} from '../../../../src/ol/proj.js';
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import {HALF_SIZE} from '../../../../src/ol/proj/epsg3857.js';
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import ReprojImage from '../../../../src/ol/reproj/Image.js';
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import Static from '../../../../src/ol/source/ImageStatic.js';
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import {createXYZ, createForProjection} from '../../../../src/ol/tilegrid.js';
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describe('ol.rendering.reproj.Image', function() {
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function testSingleImage(source, targetProj,
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targetExtent, targetResolution, pixelRatio, expectedUrl, done) {
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const sourceProj = source.getProjection();
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let imagesRequested = 0;
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const image = new ReprojImage(sourceProj, getProjection(targetProj),
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targetExtent, targetResolution, pixelRatio,
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function(extent, resolution, pixelRatio) {
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imagesRequested++;
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return source.getImage(extent, resolution, pixelRatio, sourceProj);
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});
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if (image.getState() == 0) { // IDLE
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listen(image, 'change', function(e) {
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if (image.getState() == 2) { // LOADED
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expect(imagesRequested).to.be(1);
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resembleCanvas(image.getImage(), expectedUrl, IMAGE_TOLERANCE, done);
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}
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});
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image.load();
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}
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}
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let source;
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describe('image reprojections from EPSG:3857', function() {
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beforeEach(function() {
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source = new Static({
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url: 'rendering/ol/data/tiles/osm/5/5/12.png',
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imageExtent: createXYZ().getTileCoordExtent([5, 5, -13]),
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projection: getProjection('EPSG:3857')
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});
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});
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it('works for identity reprojection', function(done) {
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testSingleImage(source, 'EPSG:3857',
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createXYZ().getTileCoordExtent([5, 5, -13]),
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2 * HALF_SIZE / (256 * (1 << 5)), 1,
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'rendering/ol/data/tiles/osm/5/5/12.png', done);
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});
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it('to EPSG:4326', function(done) {
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testSingleImage(source, 'EPSG:4326',
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createForProjection('EPSG:4326').
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getTileCoordExtent([6, 10, -10]),
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360 / (256 * (1 << 4)), 1,
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'rendering/ol/reproj/expected/image-3857-to-4326.png', done);
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});
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});
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});
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