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Only draw batches in visible extent

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This commit is contained in:
Tom Payne
2013-11-08 23:33:57 +01:00
parent ba1a35b59b
commit 61e221c504
2 changed files with 7 additions and 3 deletions
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src/ol/renderer/canvas/canvasvectorlayerrenderer.js
+1 -1
View File
@@ -87,7 +87,7 @@ ol.renderer.canvas.VectorLayer.prototype.composeFrame =
0); 0);
context.globalAlpha = layerState.opacity; context.globalAlpha = layerState.opacity;
batchGroup.draw(context, transform); batchGroup.draw(context, frameState.extent, transform);
}; };
src/ol/replay/canvas/canvasreplay.js
+6 -2
View File
@@ -411,9 +411,11 @@ ol.replay.canvas.BatchGroup = function() {
/** /**
* @param {CanvasRenderingContext2D} context Context. * @param {CanvasRenderingContext2D} context Context.
* @param {ol.Extent} extent Extent.
* @param {goog.vec.Mat4.AnyType} transform Transform. * @param {goog.vec.Mat4.AnyType} transform Transform.
*/ */
ol.replay.canvas.BatchGroup.prototype.draw = function(context, transform) { ol.replay.canvas.BatchGroup.prototype.draw =
function(context, extent, transform) {
/** @type {Array.<number>} */ /** @type {Array.<number>} */
var zs = goog.array.map(goog.object.getKeys(this.batchesByZIndex_), Number); var zs = goog.array.map(goog.object.getKeys(this.batchesByZIndex_), Number);
goog.array.sort(zs); goog.array.sort(zs);
@@ -423,7 +425,9 @@ ol.replay.canvas.BatchGroup.prototype.draw = function(context, transform) {
var batchType; var batchType;
for (batchType in batches) { for (batchType in batches) {
var batch = batches[batchType]; var batch = batches[batchType];
batch.draw(context, transform); if (ol.extent.intersects(extent, batch.getExtent())) {
batch.draw(context, transform);
}
} }
} }
}; };