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Assume limited precision when rounding

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This commit is contained in:
Tim Schaub
2021-12-09 13:22:29 -05:00
parent 01c81373b3
commit 78bf0a3679
4 changed files with 179 additions and 12 deletions
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30
test/browser/spec/ol/source/imagewms.test.js → test/browser/spec/ol/source/ImageWMS.test.js
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@@ -3,10 +3,14 @@ import ImageState from '../../../../../src/ol/ImageState.js';
import ImageWMS from '../../../../../src/ol/source/ImageWMS.js';
import Map from '../../../../../src/ol/Map.js';
import View from '../../../../../src/ol/View.js';
import {getHeight, getWidth} from '../../../../../src/ol/extent.js';
import {
getForViewAndSize,
getHeight,
getWidth,
} from '../../../../../src/ol/extent.js';
import {get as getProjection} from '../../../../../src/ol/proj.js';
describe('ol.source.ImageWMS', function () {
describe('ol/source/ImageWMS', function () {
let extent, pixelRatio, options, optionsReproj, projection, resolution;
beforeEach(function () {
extent = [10, 20, 30, 40];
@@ -87,6 +91,28 @@ describe('ol.source.ImageWMS', function () {
expect(height).to.be(Math.round(height));
});
it('does not request extra pixels due to floating point issues', function () {
const source = new ImageWMS({
params: {LAYERS: 'layer'},
url: 'http://example.com/wms',
ratio: 1,
});
const mapSize = [1110, 670];
const rotation = 0;
const resolution = 354.64216525539024;
const center = [1224885.7248147277, 6681822.177576577];
const extent = getForViewAndSize(center, resolution, rotation, mapSize);
const projection = getProjection('EPSG:3857');
const image = source.getImage(extent, resolution, 1, projection);
const params = new URL(image.src_).searchParams;
const imageWidth = Number(params.get('WIDTH'));
const imageHeight = Number(params.get('HEIGHT'));
expect(imageWidth).to.be(mapSize[0]);
expect(imageHeight).to.be(mapSize[1]);
});
it('sets WIDTH and HEIGHT to match the aspect ratio of BBOX', function () {
const source = new ImageWMS(options);
const image = source.getImage(extent, resolution, pixelRatio, projection);