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Only render and cache tiles that have features

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This commit is contained in:
ahocevar
2013-06-23 15:52:31 +02:00
parent 4392feef1b
commit 3fc4fc3eb8
1 changed files with 10 additions and 5 deletions
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15
src/ol/renderer/canvas/canvasvectorlayerrenderer.js
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@@ -406,7 +406,7 @@ ol.renderer.canvas.VectorLayer.prototype.renderFrame =
deferred = false,
dirty = false,
i, geomFilter, tileExtent, extentFilter, type,
groups, group, j, numGroups;
groups, group, j, numGroups, featuresObject, tileHasFeatures;
for (x = tileRange.minX; x <= tileRange.maxX; ++x) {
for (y = tileRange.minY; y <= tileRange.maxY; ++y) {
tileCoord = new ol.TileCoord(z, x, y);
@@ -420,17 +420,22 @@ ol.renderer.canvas.VectorLayer.prototype.renderFrame =
tileExtent[2] -= tileGutter;
tileExtent[3] += tileGutter;
extentFilter = new ol.filter.Extent(tileExtent);
tileHasFeatures = false;
for (i = 0; i < numFilters; ++i) {
geomFilter = filters[i];
type = geomFilter.getType();
if (!goog.isDef(featuresToRender[type])) {
featuresToRender[type] = {};
}
goog.object.extend(featuresToRender[type],
layer.getFeaturesObject(new ol.filter.Logical(
[geomFilter, extentFilter], ol.filter.LogicalOperator.AND)));
featuresObject = layer.getFeaturesObject(new ol.filter.Logical(
[geomFilter, extentFilter], ol.filter.LogicalOperator.AND));
tileHasFeatures = tileHasFeatures ||
!goog.object.isEmpty(featuresObject);
goog.object.extend(featuresToRender[type], featuresObject);
}
if (tileHasFeatures) {
tilesOnSketchCanvas[key] = tileCoord;
}
tilesOnSketchCanvas[key] = tileCoord;
} else {
dirty = true;
}