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Take pixel ratio into account in layer-spy example

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Tom Payne
2014-03-23 02:54:15 +01:00
parent 56e958f209
commit f051230f99
1 changed files with 4 additions and 2 deletions
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6
examples/layer-spy.js
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@@ -48,12 +48,14 @@ $(map.getViewport()).on('mousemove', function(evt) {
// before rendering the layer, do some clipping // before rendering the layer, do some clipping
imagery.on('precompose', function(event) { imagery.on('precompose', function(event) {
var ctx = event.context; var ctx = event.context;
var pixelRatio = event.frameState.pixelRatio;
ctx.save(); ctx.save();
ctx.beginPath(); ctx.beginPath();
if (mousePosition) { if (mousePosition) {
// only show a circle around the mouse // only show a circle around the mouse
ctx.arc(mousePosition[0], mousePosition[1], radius, 0, 2 * Math.PI); ctx.arc(mousePosition[0] * pixelRatio, mousePosition[1] * pixelRatio,
ctx.lineWidth = 5; radius * pixelRatio, 0, 2 * Math.PI);
ctx.lineWidth = 5 * pixelRatio;
ctx.strokeStyle = 'rgba(0,0,0,0.5)'; ctx.strokeStyle = 'rgba(0,0,0,0.5)';
ctx.stroke(); ctx.stroke();
} }