77 lines
2.1 KiB
JavaScript
77 lines
2.1 KiB
JavaScript
import {apply as applyTransform} from '../../../../../src/ol/transform.js';
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import Map from '../../../../../src/ol/Map.js';
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import ImageLayer from '../../../../../src/ol/layer/Image.js';
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import ImageSource from '../../../../../src/ol/source/Image.js';
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import WebGLImageLayerRenderer from '../../../../../src/ol/renderer/webgl/ImageLayer.js';
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describe('ol.renderer.webgl.ImageLayer', function() {
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describe('updateProjectionMatrix_', function() {
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let map;
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let renderer;
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let canvasWidth;
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let canvasHeight;
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let pixelRatio;
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let viewResolution;
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let viewRotation;
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let viewCenter;
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let imageExtent;
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beforeEach(function() {
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map = new Map({
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target: document.createElement('div')
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});
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const layer = new ImageLayer({
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source: new ImageSource({
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extent: [0, 0, 1, 1]
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})
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});
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renderer = new WebGLImageLayerRenderer(map.renderer_, layer);
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// input params
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canvasWidth = 512;
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canvasHeight = 256;
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pixelRatio = 2;
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viewResolution = 10;
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viewRotation = 0;
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viewCenter = [7680, 3840];
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// view extent is 512O, 2560, 10240, 5120
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// image size is 1024, 768
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// image resolution is 10
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imageExtent = [0, 0, 10240, 7680];
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});
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afterEach(function() {
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map.dispose();
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});
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it('produces a correct matrix', function() {
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renderer.updateProjectionMatrix_(canvasWidth, canvasHeight,
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pixelRatio, viewCenter, viewResolution, viewRotation, imageExtent);
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const matrix = renderer.getProjectionMatrix();
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let output = applyTransform(matrix, [-1, -1]);
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expect(output[0]).to.eql(-6);
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expect(output[1]).to.eql(-6);
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output = applyTransform(matrix, [1, -1]);
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expect(output[0]).to.eql(2);
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expect(output[1]).to.eql(-6);
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output = applyTransform(matrix, [-1, 1]);
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expect(output[0]).to.eql(-6);
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expect(output[1]).to.eql(6);
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output = applyTransform(matrix, [1, 1]);
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expect(output[0]).to.eql(2);
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expect(output[1]).to.eql(6);
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output = applyTransform(matrix, [0, 0]);
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expect(output[0]).to.eql(-2);
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expect(output[1]).to.eql(0);
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});
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});
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});
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