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WebGL points / rebuild buffers only when extent changed

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This commit is contained in:
Olivier Guyot
2019-05-14 15:18:42 +02:00
parent 523097903a
commit 75eb62363a
2 changed files with 20 additions and 1 deletions
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7
src/ol/renderer/webgl/PointsLayer.js
View File

@@ -9,6 +9,7 @@ import WebGLLayerRenderer, {getBlankTexture, pushFeatureInBuffer} from './Layer'
import GeoJSON from '../../format/GeoJSON';
import {getUid} from '../../util';
import ViewHint from '../../ViewHint';
import {createEmpty, equals} from '../../extent';
const VERTEX_SHADER = `
precision mediump float;
@@ -240,6 +241,8 @@ class WebGLPointsLayerRenderer extends WebGLLayerRenderer {
* @private
*/
this.geojsonFeatureCache_ = {};
this.previousExtent_ = createEmpty();
}
/**
@@ -288,8 +291,10 @@ class WebGLPointsLayerRenderer extends WebGLLayerRenderer {
vectorSource.loadFeatures([-Infinity, -Infinity, Infinity, Infinity], resolution, projection);
}
if (!frameState.viewHints[ViewHint.ANIMATING] && !frameState.viewHints[ViewHint.INTERACTING]) {
if (!frameState.viewHints[ViewHint.ANIMATING] && !frameState.viewHints[ViewHint.INTERACTING] &&
!equals(this.previousExtent_, frameState.extent)) {
this.rebuildBuffers_(frameState);
this.previousExtent_ = frameState.extent.slice();
}
// write new data

14
test/spec/ol/renderer/webgl/pointslayer.test.js
View File

@@ -107,6 +107,7 @@ describe('ol.renderer.webgl.PointsLayer', function() {
it('rebuilds the buffers only when not interacting or animating', function() {
const spy = sinon.spy(renderer, 'rebuildBuffers_');
frameState.viewHints[ViewHint.INTERACTING] = 1;
frameState.viewHints[ViewHint.ANIMATING] = 0;
renderer.prepareFrame(frameState);
@@ -123,6 +124,19 @@ describe('ol.renderer.webgl.PointsLayer', function() {
expect(spy.called).to.be(true);
});
it('rebuilds the buffers only when the frame extent changed', function() {
const spy = sinon.spy(renderer, 'rebuildBuffers_');
renderer.prepareFrame(frameState);
expect(spy.callCount).to.be(1);
renderer.prepareFrame(frameState);
expect(spy.callCount).to.be(1);
frameState.extent = [10, 20, 30, 40];
renderer.prepareFrame(frameState);
expect(spy.callCount).to.be(2);
});
});
});