Add vectorContext.setStyle() method

src/ol/render/canvas/canvasimmediate.js

@@ -461,6 +461,20 @@ ol.render.canvas.Immediate.prototype.drawCircleGeometry = function(circleGeometr
 };
 
 
+/**
+ * Set the rendering style.  Note that since this is an immediate rendering API,
+ * any `zIndex` on the provided style will be ignored.
+ *
+ * @param {ol.style.Style} style The rendering style.
+ * @api
+ */
+ol.render.canvas.Immediate.prototype.setStyle = function(style) {
+  this.setFillStrokeStyle(style.getFill(), style.getStroke());
+  this.setImageStyle(style.getImage());
+  this.setTextStyle(style.getText());
+};
+
+
 /**
  * Render a feature into the canvas.  In order to respect the zIndex of the
  * style this method draws asynchronously and thus *after* calls to

test/spec/ol/render/canvasimmediate.test.js

@@ -25,6 +25,33 @@ describe('ol.render.canvas.Immediate', function() {
     });
   });
 
+  describe('#setStyle()', function() {
+    it('calls the more specific methods with style parts', function() {
+      var context = new ol.render.canvas.Immediate();
+      sinon.spy(context, 'setFillStrokeStyle');
+      sinon.spy(context, 'setImageStyle');
+      sinon.spy(context, 'setTextStyle');
+      var fill = new ol.style.Fill({});
+      var stroke = new ol.style.Stroke({});
+      var text = new ol.style.Text({});
+      var image = new ol.style.Circle({});
+      var style = new ol.style.Style({
+        fill: fill,
+        stroke: stroke,
+        image: image,
+        text: text
+      });
+
+      context.setStyle(style);
+      expect(context.setFillStrokeStyle.calledOnce).to.be(true);
+      expect(context.setFillStrokeStyle.firstCall.calledWithExactly(fill, stroke)).to.be(true);
+      expect(context.setImageStyle.calledOnce).to.be(true);
+      expect(context.setImageStyle.firstCall.calledWithExactly(image)).to.be(true);
+      expect(context.setTextStyle.calledOnce).to.be(true);
+      expect(context.setTextStyle.firstCall.calledWithExactly(text)).to.be(true);
+    });
+  });
+
   describe('#drawMultiPolygonGeometry', function() {
     it('creates the correct canvas instructions for 3D geometries', function() {
       var log = {
@@ -120,3 +147,8 @@ describe('ol.render.canvas.Immediate', function() {
 goog.require('ol.geom.MultiPolygon');
 goog.require('ol.render.VectorContext');
 goog.require('ol.render.canvas.Immediate');
+goog.require('ol.style.Circle');
+goog.require('ol.style.Fill');
+goog.require('ol.style.Stroke');
+goog.require('ol.style.Style');
+goog.require('ol.style.Text');