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Webgl renderer / add id encode/decode utils

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This commit is contained in:
Olivier Guyot
2019-05-19 11:55:54 +02:00
parent 034e0be76f
commit 8145b358c0
2 changed files with 69 additions and 0 deletions
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33
test/spec/ol/renderer/webgl/layer.test.js
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@@ -1,4 +1,6 @@
import WebGLLayerRenderer, {
colorDecodeId,
colorEncodeId,
getBlankTexture, POINT_INSTRUCTIONS_COUNT, POINT_VERTEX_STRIDE,
writePointFeatureInstructions, writePointFeatureToBuffers
} from '../../../../../src/ol/renderer/webgl/Layer.js';
@@ -249,4 +251,35 @@ describe('ol.renderer.webgl.Layer', function() {
});
});
describe('colorEncodeId and colorDecodeId', function() {
it('correctly encodes and decodes ids', function() {
expect(colorDecodeId(colorEncodeId(0))).to.eql(0);
expect(colorDecodeId(colorEncodeId(1))).to.eql(1);
expect(colorDecodeId(colorEncodeId(123))).to.eql(123);
expect(colorDecodeId(colorEncodeId(12345))).to.eql(12345);
expect(colorDecodeId(colorEncodeId(123456))).to.eql(123456);
expect(colorDecodeId(colorEncodeId(91612))).to.eql(91612);
expect(colorDecodeId(colorEncodeId(1234567890))).to.eql(1234567890);
});
it('correctly reuses array', function() {
const arr = [];
expect(colorEncodeId(123, arr)).to.be(arr);
});
it('is compatible with Uint8Array storage', function() {
const encoded = colorEncodeId(91612);
const typed = Uint8Array.of(encoded[0] * 255, encoded[1] * 255,
encoded[2] * 255, encoded[3] * 255);
const arr = [
typed[0] / 255,
typed[1] / 255,
typed[2] / 255,
typed[3] / 255
];
const decoded = colorDecodeId(arr);
expect(decoded).to.eql(91612);
});
});
});