9ce3bc7f3d
This commit takes the device pixel ratio into account when calculating the matrix used to apply the image to the output canvas.
91 lines
2.5 KiB
JavaScript
91 lines
2.5 KiB
JavaScript
goog.provide('ol.test.renderer.webgl.ImageLayer');
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describe('ol.renderer.webgl.ImageLayer', function() {
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describe('updateProjectionMatrix_', function() {
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var map;
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var renderer;
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var canvasWidth;
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var canvasHeight;
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var pixelRatio;
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var viewResolution;
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var viewRotation;
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var viewCenter;
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var imageExtent;
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beforeEach(function() {
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ol.proj.common.add();
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map = new ol.Map({
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target: document.createElement('div')
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});
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var layer = new ol.layer.Image({
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source: new ol.source.Image({
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extent: [0, 0, 1, 1]
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})
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});
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renderer = new ol.renderer.webgl.ImageLayer(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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goog.dispose(map);
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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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var matrix = renderer.getProjectionMatrix();
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var input;
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var output = goog.vec.Vec4.createNumber();
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input = goog.vec.Vec4.createFromValues(-1, -1, 0, 1);
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goog.vec.Mat4.multVec4(matrix, input, output);
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expect(output[0]).to.eql(-6);
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expect(output[1]).to.eql(-6);
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input = goog.vec.Vec4.createFromValues(1, -1, 0, 1);
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goog.vec.Mat4.multVec4(matrix, input, output);
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expect(output[0]).to.eql(2);
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expect(output[1]).to.eql(-6);
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input = goog.vec.Vec4.createFromValues(-1, 1, 0, 1);
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goog.vec.Mat4.multVec4(matrix, input, output);
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expect(output[0]).to.eql(-6);
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expect(output[1]).to.eql(6);
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input = goog.vec.Vec4.createFromValues(1, 1, 0, 1);
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goog.vec.Mat4.multVec4(matrix, input, output);
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expect(output[0]).to.eql(2);
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expect(output[1]).to.eql(6);
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input = goog.vec.Vec4.createFromValues(0, 0, 0, 1);
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goog.vec.Mat4.multVec4(matrix, input, output);
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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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goog.require('goog.dispose');
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goog.require('goog.vec.Mat4');
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goog.require('goog.vec.Vec4');
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goog.require('ol.Map');
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goog.require('ol.proj.common');
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goog.require('ol.layer.Image');
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goog.require('ol.source.Image');
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goog.require('ol.renderer.webgl.ImageLayer');
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