diff --git a/examples/semi-transparent-layer.css b/examples/semi-transparent-layer.css
new file mode 100644
index 0000000000..fa8d7cfa3f
--- /dev/null
+++ b/examples/semi-transparent-layer.css
@@ -0,0 +1,3 @@
+.bw {
+ filter: grayscale(100%);
+}
diff --git a/examples/semi-transparent-layer.html b/examples/semi-transparent-layer.html
index 5367196352..3a96d2b9cc 100644
--- a/examples/semi-transparent-layer.html
+++ b/examples/semi-transparent-layer.html
@@ -3,7 +3,7 @@ layout: example.html
title: Semi-Transparent Layer
shortdesc: Example of a map with a semi-transparent layer.
docs: >
- This example will display a tiled MaxBox layer semi-transparently over an OSM background.
+ This example will display a tiled MaxBox layer semi-transparently over an OSM background. The OSM layer is changed to back and white by using a CSS filter.
tags: "transparent, osm, tilejson"
---
diff --git a/examples/semi-transparent-layer.js b/examples/semi-transparent-layer.js
index 08505b6520..776653a781 100644
--- a/examples/semi-transparent-layer.js
+++ b/examples/semi-transparent-layer.js
@@ -9,6 +9,7 @@ import TileJSON from '../src/ol/source/TileJSON.js';
const map = new Map({
layers: [
new TileLayer({
+ className: 'bw',
source: new OSM()
}),
new TileLayer({
diff --git a/rendering/cases/linestring-style-css-filter/expected.png b/rendering/cases/linestring-style-css-filter/expected.png
new file mode 100644
index 0000000000..c2d039de8b
Binary files /dev/null and b/rendering/cases/linestring-style-css-filter/expected.png differ
diff --git a/rendering/cases/linestring-style-css-filter/index.html b/rendering/cases/linestring-style-css-filter/index.html
new file mode 100644
index 0000000000..11dee51983
--- /dev/null
+++ b/rendering/cases/linestring-style-css-filter/index.html
@@ -0,0 +1,25 @@
+
+
+
+
+
+
+
+
+
+
+
diff --git a/rendering/cases/linestring-style-css-filter/main.js b/rendering/cases/linestring-style-css-filter/main.js
new file mode 100644
index 0000000000..925909548b
--- /dev/null
+++ b/rendering/cases/linestring-style-css-filter/main.js
@@ -0,0 +1,70 @@
+import Map from '../../../src/ol/CompositeMap.js';
+import View from '../../../src/ol/View.js';
+import Feature from '../../../src/ol/Feature.js';
+import LineString from '../../../src/ol/geom/LineString.js';
+import VectorLayer from '../../../src/ol/layer/Vector.js';
+import VectorSource from '../../../src/ol/source/Vector.js';
+import Style from '../../../src/ol/style/Style.js';
+import Stroke from '../../../src/ol/style/Stroke.js';
+
+
+const vectorSource = new VectorSource();
+let feature;
+
+feature = new Feature({
+ geometry: new LineString([[-60, 60], [45, 60]])
+});
+vectorSource.addFeature(feature);
+
+feature = new Feature({
+ geometry: new LineString([[-60, -50], [30, 10]])
+});
+feature.setStyle(new Style({
+ stroke: new Stroke({color: '#f00', width: 3})
+}));
+vectorSource.addFeature(feature);
+
+feature = new Feature({
+ geometry: new LineString([[-110, -100], [0, 100], [100, -90]])
+});
+feature.setStyle(new Style({
+ stroke: new Stroke({
+ color: 'rgba(55, 55, 55, 0.75)',
+ width: 5,
+ lineCap: 'square',
+ lineDash: [4, 8],
+ lineJoin: 'round'
+ })
+}));
+vectorSource.addFeature(feature);
+
+feature = new Feature({
+ geometry: new LineString([[-80, 80], [80, 80], [-40, -90]])
+});
+feature.setStyle([
+ new Style({
+ stroke: new Stroke({color: '#F2F211', width: 5})
+ }),
+ new Style({
+ stroke: new Stroke({color: '#292921', width: 1})
+ })
+]);
+vectorSource.addFeature(feature);
+
+
+new Map({
+ pixelRatio: 1,
+ layers: [
+ new VectorLayer({
+ className: 'bw',
+ source: vectorSource
+ })
+ ],
+ target: 'map',
+ view: new View({
+ center: [0, 0],
+ resolution: 1
+ })
+});
+
+render();
diff --git a/src/ol/layer/Base.js b/src/ol/layer/Base.js
index 124841f1e9..e601b7a3a7 100644
--- a/src/ol/layer/Base.js
+++ b/src/ol/layer/Base.js
@@ -10,6 +10,7 @@ import {assign} from '../obj.js';
/**
* @typedef {Object} Options
+ * @property {string} [className='ol-layer'] A CSS class name to set to the layer element.
* @property {number} [opacity=1] Opacity (0, 1).
* @property {boolean} [visible=true] Visibility.
* @property {import("../extent.js").Extent} [extent] The bounding extent for layer rendering. The layer will not be
@@ -57,6 +58,13 @@ class BaseLayer extends BaseObject {
properties[LayerProperty.MIN_RESOLUTION] =
options.minResolution !== undefined ? options.minResolution : 0;
+ /**
+ * @type {string}
+ * @private
+ */
+ this.className_ = properties.className !== undefined ? options.className : 'ol-layer';
+ delete properties.className;
+
this.setProperties(properties);
/**
@@ -67,6 +75,13 @@ class BaseLayer extends BaseObject {
}
+ /**
+ * @return {string} CSS class name.
+ */
+ getClassName() {
+ return this.className_;
+ }
+
/**
* @return {import("./Layer.js").State} Layer state.
*/
diff --git a/src/ol/renderer/canvas/IntermediateCanvas.js b/src/ol/renderer/canvas/IntermediateCanvas.js
index a3d9565676..3c27a015bf 100644
--- a/src/ol/renderer/canvas/IntermediateCanvas.js
+++ b/src/ol/renderer/canvas/IntermediateCanvas.js
@@ -44,7 +44,10 @@ class IntermediateCanvasRenderer extends CanvasLayerRenderer {
* @type {CanvasRenderingContext2D}
*/
this.layerContext = createCanvasContext2D();
- this.layerContext.canvas.style.position = 'absolute';
+
+ const canvas = this.layerContext.canvas;
+ canvas.style.position = 'absolute';
+ canvas.className = this.getLayer().getClassName();
}
/**
diff --git a/src/ol/renderer/canvas/VectorLayer.js b/src/ol/renderer/canvas/VectorLayer.js
index cd6ec664d8..6864bda9c9 100644
--- a/src/ol/renderer/canvas/VectorLayer.js
+++ b/src/ol/renderer/canvas/VectorLayer.js
@@ -83,6 +83,7 @@ class CanvasVectorLayerRenderer extends CanvasLayerRenderer {
const canvas = this.context.canvas;
canvas.style.position = 'absolute';
+ canvas.className = this.getLayer().getClassName();
listen(labelCache, EventType.CLEAR, this.handleFontsChanged_, this);
}