Allow flat coordinates for Polygon constructor

src/ol/format/GML3.js

@@ -247,7 +247,6 @@ GML3.prototype.readSurface_ = function(node, objectStack) {
   const flatLinearRings = pushParseAndPop([null],
     this.SURFACE_PARSERS_, node, objectStack, this);
   if (flatLinearRings && flatLinearRings[0]) {
-    const polygon = new Polygon(null);
     const flatCoordinates = flatLinearRings[0];
     const ends = [flatCoordinates.length];
     let i, ii;
@@ -255,9 +254,7 @@ GML3.prototype.readSurface_ = function(node, objectStack) {
       extend(flatCoordinates, flatLinearRings[i]);
       ends.push(flatCoordinates.length);
     }
-    polygon.setFlatCoordinates(
-      GeometryLayout.XYZ, flatCoordinates, ends);
-    return polygon;
+    return new Polygon(flatCoordinates, GeometryLayout.XYZ, ends);
   } else {
     return undefined;
   }

src/ol/format/GMLBase.js

@@ -444,7 +444,6 @@ GMLBase.prototype.readPolygon = function(node, objectStack) {
   const flatLinearRings = pushParseAndPop([null],
     this.FLAT_LINEAR_RINGS_PARSERS_, node, objectStack, this);
   if (flatLinearRings && flatLinearRings[0]) {
-    const polygon = new Polygon(null);
     const flatCoordinates = flatLinearRings[0];
     const ends = [flatCoordinates.length];
     let i, ii;
@@ -452,8 +451,7 @@ GMLBase.prototype.readPolygon = function(node, objectStack) {
       extend(flatCoordinates, flatLinearRings[i]);
       ends.push(flatCoordinates.length);
     }
-    polygon.setFlatCoordinates(GeometryLayout.XYZ, flatCoordinates, ends);
-    return polygon;
+    return new Polygon(flatCoordinates, GeometryLayout.XYZ, ends);
   } else {
     return undefined;
   }

src/ol/format/KML.js

@@ -1047,9 +1047,7 @@ function readLinearRing(node, objectStack) {
   const flatCoordinates =
       readFlatCoordinatesFromNode(node, objectStack);
   if (flatCoordinates) {
-    const polygon = new Polygon(null);
-    polygon.setFlatCoordinates(GeometryLayout.XYZ, flatCoordinates,
-      [flatCoordinates.length]);
+    const polygon = new Polygon(flatCoordinates, GeometryLayout.XYZ, [flatCoordinates.length]);
     polygon.setProperties(properties);
     return polygon;
   } else {
@@ -1179,14 +1177,13 @@ function readPolygon(node, objectStack) {
   const flatLinearRings = pushParseAndPop([null],
     FLAT_LINEAR_RINGS_PARSERS, node, objectStack);
   if (flatLinearRings && flatLinearRings[0]) {
-    const polygon = new Polygon(null);
     const flatCoordinates = flatLinearRings[0];
     const ends = [flatCoordinates.length];
     for (let i = 1, ii = flatLinearRings.length; i < ii; ++i) {
       extend(flatCoordinates, flatLinearRings[i]);
       ends.push(flatCoordinates.length);
     }
-    polygon.setFlatCoordinates(GeometryLayout.XYZ, flatCoordinates, ends);
+    const polygon = new Polygon(flatCoordinates, GeometryLayout.XYZ, ends);
     polygon.setProperties(properties);
     return polygon;
   } else {

src/ol/format/MVT.js

@@ -336,17 +336,19 @@ MVT.prototype.createFeature_ = function(pbf, rawFeature, opt_options) {
         ends = endss;
         geom = new MultiPolygon(null);
       } else {
-        geom = new Polygon(null);
+        geom = new Polygon(flatCoordinates, GeometryLayout.XY, ends);
       }
     } else {
       geom = geometryType === GeometryType.POINT ? new Point(null) :
         geometryType === GeometryType.LINE_STRING ? new LineString(null) :
-          geometryType === GeometryType.POLYGON ? new Polygon(null) :
+          geometryType === GeometryType.POLYGON ? new Polygon(flatCoordinates, GeometryLayout.XY, ends) :
             geometryType === GeometryType.MULTI_POINT ? new MultiPoint (null) :
               geometryType === GeometryType.MULTI_LINE_STRING ? new MultiLineString(null) :
                 null;
     }
-    geom.setFlatCoordinates(GeometryLayout.XY, flatCoordinates, ends);
+    if (geometryType !== GeometryType.POLYGON) {
+      geom.setFlatCoordinates(GeometryLayout.XY, flatCoordinates, ends);
+    }
     feature = new this.featureClass_();
     if (this.geometryName_) {
       feature.setGeometryName(this.geometryName_);

src/ol/format/OSMXML.js

@@ -175,9 +175,7 @@ OSMXML.prototype.readFeaturesFromNode = function(node, opt_options) {
       let geometry;
       if (values.ndrefs[0] == values.ndrefs[values.ndrefs.length - 1]) {
         // closed way
-        geometry = new Polygon(null);
-        geometry.setFlatCoordinates(GeometryLayout.XY, flatCoordinates,
-          [flatCoordinates.length]);
+        geometry = new Polygon(flatCoordinates, GeometryLayout.XY, [flatCoordinates.length]);
       } else {
         geometry = new LineString(null);
         geometry.setFlatCoordinates(GeometryLayout.XY, flatCoordinates);