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Cache the buffered extent value

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Assuming that the maxExtent and resolution property are immutable
This commit is contained in:
Frederic Junod
2014-12-17 14:41:07 +01:00
parent a7fcf05a4b
commit 0d3eb8642f
1 changed files with 34 additions and 12 deletions
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46
src/ol/render/canvas/canvasreplay.js
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@@ -62,10 +62,17 @@ ol.render.canvas.Replay = function(tolerance, maxExtent, resolution) {
/**
* @protected
* @const
* @type {ol.Extent}
*/
this.maxExtent = maxExtent;
/**
* @private
* @type {ol.Extent}
*/
this.bufferedMaxExtent_ = null;
/**
* @protected
* @type {number}
@@ -74,6 +81,7 @@ ol.render.canvas.Replay = function(tolerance, maxExtent, resolution) {
/**
* @protected
* @const
* @type {number}
*/
this.resolution = resolution;
@@ -964,12 +972,14 @@ ol.render.canvas.LineStringReplay.prototype.drawFlatCoordinates_ =
* @inheritDoc
*/
ol.render.canvas.LineStringReplay.prototype.getBufferedMaxExtent = function() {
var extent = this.maxExtent;
if (this.maxLineWidth) {
extent = ol.extent.buffer(
extent, this.resolution * (this.maxLineWidth + 1) / 2);
if (goog.isNull(this.bufferedMaxExtent_)) {
this.bufferedMaxExtent_ = ol.extent.clone(this.maxExtent);
if (this.maxLineWidth > 0) {
var width = this.resolution * (this.maxLineWidth + 1) / 2;
ol.extent.buffer(this.bufferedMaxExtent_, width, this.bufferedMaxExtent_);
}
}
return extent;
return this.bufferedMaxExtent_;
};
@@ -1116,7 +1126,12 @@ ol.render.canvas.LineStringReplay.prototype.setFillStrokeStyle =
var strokeStyleMiterLimit = strokeStyle.getMiterLimit();
this.state_.miterLimit = goog.isDef(strokeStyleMiterLimit) ?
strokeStyleMiterLimit : ol.render.canvas.defaultMiterLimit;
this.maxLineWidth = Math.max(this.maxLineWidth, this.state_.lineWidth);
if (this.state_.lineWidth > this.maxLineWidth) {
this.maxLineWidth = this.state_.lineWidth;
// invalidate the buffered max extent cache
this.bufferedMaxExtent_ = null;
}
};
@@ -1369,12 +1384,14 @@ ol.render.canvas.PolygonReplay.prototype.finish = function() {
* @inheritDoc
*/
ol.render.canvas.PolygonReplay.prototype.getBufferedMaxExtent = function() {
var extent = this.maxExtent;
if (this.maxLineWidth) {
extent = ol.extent.buffer(
extent, this.resolution * (this.maxLineWidth + 1) / 2);
if (goog.isNull(this.bufferedMaxExtent_)) {
this.bufferedMaxExtent_ = ol.extent.clone(this.maxExtent);
if (this.maxLineWidth > 0) {
var width = this.resolution * (this.maxLineWidth + 1) / 2;
ol.extent.buffer(this.bufferedMaxExtent_, width, this.bufferedMaxExtent_);
}
}
return extent;
return this.bufferedMaxExtent_;
};
@@ -1412,7 +1429,12 @@ ol.render.canvas.PolygonReplay.prototype.setFillStrokeStyle =
var strokeStyleMiterLimit = strokeStyle.getMiterLimit();
state.miterLimit = goog.isDef(strokeStyleMiterLimit) ?
strokeStyleMiterLimit : ol.render.canvas.defaultMiterLimit;
this.maxLineWidth = Math.max(this.maxLineWidth, state.lineWidth);
if (state.lineWidth > this.maxLineWidth) {
this.maxLineWidth = state.lineWidth;
// invalidate the buffered max extent cache
this.bufferedMaxExtent_ = null;
}
} else {
state.strokeStyle = undefined;
state.lineCap = undefined;