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Refactor VectorTile renderer and add lower resolution clipping

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This commit is contained in:
Andreas Hocevar
2016-11-07 09:37:09 +01:00
parent 0d65d1d813
commit ee7b894350
8 changed files with 228 additions and 259 deletions
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26
src/ol/render/canvas/replaygroup.js
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@@ -149,6 +149,23 @@ ol.render.canvas.ReplayGroup.prototype.forEachFeatureAtCoordinate = function(
};
/**
* @param {ol.Transform} transform Transform.
* @return {Array.<number>} Clip coordinates.
*/
ol.render.canvas.ReplayGroup.prototype.getClipCoords = function(transform) {
var maxExtent = this.maxExtent_;
var minX = maxExtent[0];
var minY = maxExtent[1];
var maxX = maxExtent[2];
var maxY = maxExtent[3];
var flatClipCoords = [minX, minY, minX, maxY, maxX, maxY, maxX, minY];
ol.geom.flat.transform.transform2D(
flatClipCoords, 0, 8, 2, transform, flatClipCoords);
return flatClipCoords;
};
/**
* @inheritDoc
*/
@@ -200,14 +217,7 @@ ol.render.canvas.ReplayGroup.prototype.replay = function(context, pixelRatio,
// setup clipping so that the parts of over-simplified geometries are not
// visible outside the current extent when panning
var maxExtent = this.maxExtent_;
var minX = maxExtent[0];
var minY = maxExtent[1];
var maxX = maxExtent[2];
var maxY = maxExtent[3];
var flatClipCoords = [minX, minY, minX, maxY, maxX, maxY, maxX, minY];
ol.geom.flat.transform.transform2D(
flatClipCoords, 0, 8, 2, transform, flatClipCoords);
var flatClipCoords = this.getClipCoords(transform);
context.save();
context.beginPath();
context.moveTo(flatClipCoords[0], flatClipCoords[1]);