openlayers
Version:
Build tools and sources for developing OpenLayers based mapping applications
67 lines (61 loc) • 2.2 kB
JavaScript
goog.provide('ol.test.renderer.canvas.Layer');
goog.require('ol.transform');
goog.require('ol.layer.Image');
goog.require('ol.renderer.Map');
goog.require('ol.renderer.canvas.IntermediateCanvas');
describe('ol.renderer.canvas.IntermediateCanvas', function() {
describe('#composeFrame()', function() {
it('clips to layer extent and draws image', function() {
var layer = new ol.layer.Image({
extent: [1, 2, 3, 4]
});
var renderer = new ol.renderer.canvas.IntermediateCanvas(layer);
var image = new Image();
image.width = 3;
image.height = 3;
renderer.getImage = function() {
return image;
};
var frameState = {
viewState: {
center: [2, 3],
resolution: 1,
rotation: 0
},
size: [10, 10],
pixelRatio: 1,
coordinateToPixelTransform: ol.transform.create(),
pixelToCoordinateTransform: ol.transform.create()
};
renderer.getImageTransform = function() {
return ol.transform.create();
};
ol.renderer.Map.prototype.calculateMatrices2D(frameState);
var layerState = layer.getLayerState();
var context = {
save: sinon.spy(),
restore: sinon.spy(),
translate: sinon.spy(),
rotate: sinon.spy(),
beginPath: sinon.spy(),
moveTo: sinon.spy(),
lineTo: sinon.spy(),
clip: sinon.spy(),
drawImage: sinon.spy()
};
renderer.composeFrame(frameState, layerState, context);
expect(context.save.callCount).to.be(1);
expect(context.translate.callCount).to.be(0);
expect(context.rotate.callCount).to.be(0);
expect(context.beginPath.callCount).to.be(1);
expect(context.moveTo.firstCall.args).to.eql([4, 4]);
expect(context.lineTo.firstCall.args).to.eql([6, 4]);
expect(context.lineTo.secondCall.args).to.eql([6, 6]);
expect(context.lineTo.thirdCall.args).to.eql([4, 6]);
expect(context.clip.callCount).to.be(1);
expect(context.drawImage.firstCall.args).to.eql(
[renderer.getImage(), 0, 0, 3, 3, 0, 0, 3, 3]);
expect(context.restore.callCount).to.be(1);
});
});
});