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Add skipping capability to LineStringReplay

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This commit is contained in:
GaborFarkas
2016-07-04 16:19:48 +02:00
parent 48d3bfe297
commit 1c7203a203
1 changed files with 41 additions and 1 deletions
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42
src/ol/render/webgl/imagereplay/index.js
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@@ -1469,7 +1469,7 @@ ol.render.webgl.LineStringReplay.prototype.drawReplay_ = function(gl, context, s
}
if (!ol.object.isEmpty(skippedFeaturesHash)) {
// TODO: draw by blocks to skip features
this.drawReplaySkipping_(gl, context, skippedFeaturesHash);
} else {
goog.asserts.assert(this.styles_.length === this.styleIndices_.length,
'number of styles and styleIndices match');
@@ -1495,6 +1495,46 @@ ol.render.webgl.LineStringReplay.prototype.drawReplay_ = function(gl, context, s
};
/**
* @private
* @param {WebGLRenderingContext} gl gl.
* @param {ol.webgl.Context} context Context.
* @param {Object} skippedFeaturesHash Ids of features to skip.
*/
ol.render.webgl.LineStringReplay.prototype.drawReplaySkipping_ = function(gl, context, skippedFeaturesHash) {
goog.asserts.assert(this.startIndices_.length - 1 === this.startIndicesFeature_.length,
'number of startIndices and startIndicesFeature match');
var i, start, end, nextStyle, groupStart, feature, featureUid, featureIndex, featureStart;
featureIndex = this.startIndices_.length - 2;
end = start = this.startIndices_[featureIndex + 1];
for (i = this.styleIndices_.length - 1; i >= 0; --i) {
nextStyle = this.styles_[i];
this.setStrokeStyle_(gl, nextStyle[0], nextStyle[1], nextStyle[2]);
groupStart = this.styleIndices_[i];
while (featureIndex >= 0 &&
this.startIndices_[featureIndex] >= groupStart) {
featureStart = this.startIndices_[featureIndex];
feature = this.startIndicesFeature_[featureIndex];
featureUid = goog.getUid(feature).toString();
if (skippedFeaturesHash[featureUid]) {
if (start !== end) {
this.drawElements_(gl, context, start, end);
}
end = featureStart;
}
featureIndex--;
start = featureStart;
}
if (start !== end) {
this.drawElements_(gl, context, start, end);
}
}
};
/**
* @private
* @param {WebGLRenderingContext} gl gl.