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Buffer batch group extent

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This commit is contained in:
Tom Payne
2013-11-07 15:23:12 +01:00
parent 9f2ce8f50e
commit 633920d0f7
1 changed files with 11 additions and 3 deletions
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src/ol/renderer/canvas/canvasvectorlayerrenderer.js
+11 -3
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@@ -106,13 +106,22 @@ ol.renderer.canvas.VectorLayer.prototype.prepareFrame =
var vectorLayer = this.getVectorLayer(); var vectorLayer = this.getVectorLayer();
var vectorSource = vectorLayer.getVectorSource(); var vectorSource = vectorLayer.getVectorSource();
var frameStateExtent = frameState.extent;
if (this.renderedResolution_ == frameState.view2DState.resolution && if (this.renderedResolution_ == frameState.view2DState.resolution &&
this.renderedRevision_ == vectorSource.getRevision() && this.renderedRevision_ == vectorSource.getRevision() &&
ol.extent.containsExtent(this.renderedExtent_, frameState.extent)) { ol.extent.containsExtent(this.renderedExtent_, frameStateExtent)) {
return; return;
} }
var extent = this.renderedExtent_;
var xBuffer = ol.extent.getWidth(frameStateExtent) / 4;
var yBuffer = ol.extent.getHeight(frameStateExtent) / 4;
extent[0] = frameStateExtent[0] - xBuffer;
extent[1] = frameStateExtent[1] - yBuffer;
extent[2] = frameStateExtent[2] + xBuffer;
extent[3] = frameStateExtent[3] + yBuffer;
// FIXME dispose of old batchGroup in post render // FIXME dispose of old batchGroup in post render
goog.dispose(this.batchGroup_); goog.dispose(this.batchGroup_);
this.batchGroup = null; this.batchGroup = null;
@@ -122,14 +131,13 @@ ol.renderer.canvas.VectorLayer.prototype.prepareFrame =
styleFunction = ol.style.DefaultStyleFunction; styleFunction = ol.style.DefaultStyleFunction;
} }
var batchGroup = new ol.replay.canvas.BatchGroup(); var batchGroup = new ol.replay.canvas.BatchGroup();
vectorSource.forEachFeatureInExtent(frameState.extent, function(feature) { vectorSource.forEachFeatureInExtent(extent, function(feature) {
var style = styleFunction(feature); var style = styleFunction(feature);
ol.renderer.vector.renderFeature(batchGroup, feature, style); ol.renderer.vector.renderFeature(batchGroup, feature, style);
}, this); }, this);
this.renderedResolution_ = frameState.view2DState.resolution; this.renderedResolution_ = frameState.view2DState.resolution;
this.renderedRevision_ = vectorSource.getRevision(); this.renderedRevision_ = vectorSource.getRevision();
this.renderedExtent_ = frameState.extent;
if (!batchGroup.isEmpty()) { if (!batchGroup.isEmpty()) {
this.batchGroup_ = batchGroup; this.batchGroup_ = batchGroup;
} }