diff --git a/src/ol/render/webgl.js b/src/ol/render/webgl.js
index b02b092533..dcfbb1c019 100644
--- a/src/ol/render/webgl.js
+++ b/src/ol/render/webgl.js
@@ -1,83 +1,88 @@
 /**
  * @module ol/render/webgl
  */
-const _ol_render_webgl_ = {};
 
 
 /**
  * @const
  * @type {string}
  */
-_ol_render_webgl_.defaultFont = '10px sans-serif';
+export const DEFAULT_FONT = '10px sans-serif';
 
 
 /**
  * @const
  * @type {ol.Color}
  */
-_ol_render_webgl_.defaultFillStyle = [0.0, 0.0, 0.0, 1.0];
+export const DEFAULT_FILLSTYLE = [0.0, 0.0, 0.0, 1.0];
 
 
 /**
  * @const
  * @type {string}
  */
-_ol_render_webgl_.defaultLineCap = 'round';
+export const DEFAULT_LINECAP = 'round';
 
 
 /**
  * @const
  * @type {Array.<number>}
  */
-_ol_render_webgl_.defaultLineDash = [];
+export const DEFAULT_LINEDASH = [];
 
 
 /**
  * @const
  * @type {number}
  */
-_ol_render_webgl_.defaultLineDashOffset = 0;
+export const DEFAULT_LINEDASHOFFSET = 0;
 
 
 /**
  * @const
  * @type {string}
  */
-_ol_render_webgl_.defaultLineJoin = 'round';
+export const DEFAULT_LINEJOIN = 'round';
 
 
 /**
  * @const
  * @type {number}
  */
-_ol_render_webgl_.defaultMiterLimit = 10;
+export const DEFAULT_MITERLIMIT = 10;
 
 /**
  * @const
  * @type {ol.Color}
  */
-_ol_render_webgl_.defaultStrokeStyle = [0.0, 0.0, 0.0, 1.0];
+export const DEFAULT_STROKESTYLE = [0.0, 0.0, 0.0, 1.0];
 
 
 /**
  * @const
  * @type {number}
  */
-_ol_render_webgl_.defaultTextAlign = 0.5;
+export const DEFAULT_TEXTALIGN = 0.5;
 
 
 /**
  * @const
  * @type {number}
  */
-_ol_render_webgl_.defaultTextBaseline = 0.5;
+export const DEFAULT_TEXTBASELINE = 0.5;
 
 
 /**
  * @const
  * @type {number}
  */
-_ol_render_webgl_.defaultLineWidth = 1;
+export const DEFAULT_LINEWIDTH = 1;
+
+/**
+ * @const
+ * @type {number}
+ */
+export const EPSILON = Number.EPSILON || 2.220446049250313e-16;
 
 /**
  * Calculates the orientation of a triangle based on the determinant method.
@@ -89,15 +94,9 @@ _ol_render_webgl_.defaultLineWidth = 1;
  * @param {number} y3 Third Y coordinate.
  * @return {boolean|undefined} Triangle is clockwise.
  */
-_ol_render_webgl_.triangleIsCounterClockwise = function(x1, y1, x2, y2, x3, y3) {
+export const triangleIsCounterClockwise = function(x1, y1, x2, y2, x3, y3) {
   const area = (x2 - x1) * (y3 - y1) - (x3 - x1) * (y2 - y1);
-  return (area <= _ol_render_webgl_.EPSILON && area >= -_ol_render_webgl_.EPSILON) ?
+  return (area <= EPSILON && area >= -EPSILON) ?
     undefined : area > 0;
 };
 
-/**
- * @const
- * @type {number}
- */
-_ol_render_webgl_.EPSILON = Number.EPSILON || 2.220446049250313e-16;
-export default _ol_render_webgl_;
diff --git a/src/ol/render/webgl/CircleReplay.js b/src/ol/render/webgl/CircleReplay.js
index f2a599b046..e6005b622b 100644
--- a/src/ol/render/webgl/CircleReplay.js
+++ b/src/ol/render/webgl/CircleReplay.js
@@ -10,7 +10,8 @@ import {translate} from '../../geom/flat/transform.js';
 import {fragment, vertex} from '../webgl/circlereplay/defaultshader.js';
 import Locations from '../webgl/circlereplay/defaultshader/Locations.js';
 import WebGLReplay from '../webgl/Replay.js';
-import _ol_render_webgl_ from '../webgl.js';
+import {DEFAULT_LINEDASH, DEFAULT_LINEDASHOFFSET, DEFAULT_STROKESTYLE,
+  DEFAULT_FILLSTYLE, DEFAULT_LINEWIDTH} from '../webgl.js';
 import {FLOAT} from '../../webgl.js';
 import WebGLBuffer from '../../webgl/Buffer.js';
 
@@ -377,22 +378,22 @@ WebGLCircleReplay.prototype.setFillStrokeStyle = function(fillStyle, strokeStyle
   if (strokeStyle) {
     const strokeStyleLineDash = strokeStyle.getLineDash();
     this.state_.lineDash = strokeStyleLineDash ?
-      strokeStyleLineDash : _ol_render_webgl_.defaultLineDash;
+      strokeStyleLineDash : DEFAULT_LINEDASH;
     const strokeStyleLineDashOffset = strokeStyle.getLineDashOffset();
     this.state_.lineDashOffset = strokeStyleLineDashOffset ?
-      strokeStyleLineDashOffset : _ol_render_webgl_.defaultLineDashOffset;
+      strokeStyleLineDashOffset : DEFAULT_LINEDASHOFFSET;
     strokeStyleColor = strokeStyle.getColor();
     if (!(strokeStyleColor instanceof CanvasGradient) &&
         !(strokeStyleColor instanceof CanvasPattern)) {
       strokeStyleColor = asArray(strokeStyleColor).map(function(c, i) {
         return i != 3 ? c / 255 : c;
-      }) || _ol_render_webgl_.defaultStrokeStyle;
+      }) || DEFAULT_STROKESTYLE;
     } else {
-      strokeStyleColor = _ol_render_webgl_.defaultStrokeStyle;
+      strokeStyleColor = DEFAULT_STROKESTYLE;
     }
     strokeStyleWidth = strokeStyle.getWidth();
     strokeStyleWidth = strokeStyleWidth !== undefined ?
-      strokeStyleWidth : _ol_render_webgl_.defaultLineWidth;
+      strokeStyleWidth : DEFAULT_LINEWIDTH;
   } else {
     strokeStyleColor = [0, 0, 0, 0];
     strokeStyleWidth = 0;
@@ -402,9 +403,9 @@ WebGLCircleReplay.prototype.setFillStrokeStyle = function(fillStyle, strokeStyle
       !(fillStyleColor instanceof CanvasPattern)) {
     fillStyleColor = asArray(fillStyleColor).map(function(c, i) {
       return i != 3 ? c / 255 : c;
-    }) || _ol_render_webgl_.defaultFillStyle;
+    }) || DEFAULT_FILLSTYLE;
   } else {
-    fillStyleColor = _ol_render_webgl_.defaultFillStyle;
+    fillStyleColor = DEFAULT_FILLSTYLE;
   }
   if (!this.state_.strokeColor || !equals(this.state_.strokeColor, strokeStyleColor) ||
       !this.state_.fillColor || !equals(this.state_.fillColor, fillStyleColor) ||
diff --git a/src/ol/render/webgl/LineStringReplay.js b/src/ol/render/webgl/LineStringReplay.js
index 77ecb8fae7..fd45af9c49 100644
--- a/src/ol/render/webgl/LineStringReplay.js
+++ b/src/ol/render/webgl/LineStringReplay.js
@@ -9,7 +9,9 @@ import {linearRingIsClockwise} from '../../geom/flat/orient.js';
 import {translate} from '../../geom/flat/transform.js';
 import {lineStringIsClosed} from '../../geom/flat/topology.js';
 import {isEmpty} from '../../obj.js';
-import _ol_render_webgl_ from '../webgl.js';
+import {DEFAULT_LINECAP, DEFAULT_LINEDASH, DEFAULT_LINEDASHOFFSET,
+  DEFAULT_LINEJOIN, DEFAULT_LINEWIDTH, DEFAULT_MITERLIMIT, DEFAULT_STROKESTYLE,
+  triangleIsCounterClockwise} from '../webgl.js';
 import WebGLReplay from '../webgl/Replay.js';
 import {fragment, vertex} from '../webgl/linestringreplay/defaultshader.js';
 import Locations from '../webgl/linestringreplay/defaultshader/Locations.js';
@@ -210,7 +212,7 @@ WebGLLineStringReplay.prototype.drawCoordinates_ = function(flatCoordinates, off
     }
 
     // We group CW and straight lines, thus the not so inituitive CCW checking function.
-    sign = _ol_render_webgl_.triangleIsCounterClockwise(p0[0], p0[1], p1[0], p1[1], p2[0], p2[1])
+    sign = triangleIsCounterClockwise(p0[0], p0[1], p1[0], p1[1], p2[0], p2[1])
       ? -1 : 1;
 
     numVertices = this.addVertices_(p0, p1, p2,
@@ -646,31 +648,31 @@ WebGLLineStringReplay.prototype.setStrokeStyle_ = function(gl, color, lineWidth,
 WebGLLineStringReplay.prototype.setFillStrokeStyle = function(fillStyle, strokeStyle) {
   const strokeStyleLineCap = strokeStyle.getLineCap();
   this.state_.lineCap = strokeStyleLineCap !== undefined ?
-    strokeStyleLineCap : _ol_render_webgl_.defaultLineCap;
+    strokeStyleLineCap : DEFAULT_LINECAP;
   const strokeStyleLineDash = strokeStyle.getLineDash();
   this.state_.lineDash = strokeStyleLineDash ?
-    strokeStyleLineDash : _ol_render_webgl_.defaultLineDash;
+    strokeStyleLineDash : DEFAULT_LINEDASH;
   const strokeStyleLineDashOffset = strokeStyle.getLineDashOffset();
   this.state_.lineDashOffset = strokeStyleLineDashOffset ?
-    strokeStyleLineDashOffset : _ol_render_webgl_.defaultLineDashOffset;
+    strokeStyleLineDashOffset : DEFAULT_LINEDASHOFFSET;
   const strokeStyleLineJoin = strokeStyle.getLineJoin();
   this.state_.lineJoin = strokeStyleLineJoin !== undefined ?
-    strokeStyleLineJoin : _ol_render_webgl_.defaultLineJoin;
+    strokeStyleLineJoin : DEFAULT_LINEJOIN;
   let strokeStyleColor = strokeStyle.getColor();
   if (!(strokeStyleColor instanceof CanvasGradient) &&
       !(strokeStyleColor instanceof CanvasPattern)) {
     strokeStyleColor = asArray(strokeStyleColor).map(function(c, i) {
       return i != 3 ? c / 255 : c;
-    }) || _ol_render_webgl_.defaultStrokeStyle;
+    }) || DEFAULT_STROKESTYLE;
   } else {
-    strokeStyleColor = _ol_render_webgl_.defaultStrokeStyle;
+    strokeStyleColor = DEFAULT_STROKESTYLE;
   }
   let strokeStyleWidth = strokeStyle.getWidth();
   strokeStyleWidth = strokeStyleWidth !== undefined ?
-    strokeStyleWidth : _ol_render_webgl_.defaultLineWidth;
+    strokeStyleWidth : DEFAULT_LINEWIDTH;
   let strokeStyleMiterLimit = strokeStyle.getMiterLimit();
   strokeStyleMiterLimit = strokeStyleMiterLimit !== undefined ?
-    strokeStyleMiterLimit : _ol_render_webgl_.defaultMiterLimit;
+    strokeStyleMiterLimit : DEFAULT_MITERLIMIT;
   if (!this.state_.strokeColor || !equals(this.state_.strokeColor, strokeStyleColor) ||
       this.state_.lineWidth !== strokeStyleWidth || this.state_.miterLimit !== strokeStyleMiterLimit) {
     this.state_.changed = true;
diff --git a/src/ol/render/webgl/PolygonReplay.js b/src/ol/render/webgl/PolygonReplay.js
index a4bd2cd8da..1e0a7c9088 100644
--- a/src/ol/render/webgl/PolygonReplay.js
+++ b/src/ol/render/webgl/PolygonReplay.js
@@ -13,7 +13,7 @@ import {fragment, vertex} from '../webgl/polygonreplay/defaultshader.js';
 import Locations from '../webgl/polygonreplay/defaultshader/Locations.js';
 import WebGLLineStringReplay from '../webgl/LineStringReplay.js';
 import WebGLReplay from '../webgl/Replay.js';
-import _ol_render_webgl_ from '../webgl.js';
+import {triangleIsCounterClockwise, EPSILON, DEFAULT_FILLSTYLE} from '../webgl.js';
 import Stroke from '../../style/Stroke.js';
 import LinkedList from '../../structs/LinkedList.js';
 import RBush from '../../structs/RBush.js';
@@ -220,9 +220,9 @@ WebGLPolygonReplay.prototype.classifyPoints_ = function(list, rtree, ccw) {
   let s1 = list.nextItem();
   let pointsReclassified = false;
   do {
-    const reflex = ccw ? _ol_render_webgl_.triangleIsCounterClockwise(s1.p1.x,
+    const reflex = ccw ? triangleIsCounterClockwise(s1.p1.x,
       s1.p1.y, s0.p1.x, s0.p1.y, s0.p0.x, s0.p0.y) :
-      _ol_render_webgl_.triangleIsCounterClockwise(s0.p0.x, s0.p0.y, s0.p1.x,
+      triangleIsCounterClockwise(s0.p0.x, s0.p0.y, s0.p1.x,
         s0.p1.y, s1.p1.x, s1.p1.y);
     if (reflex === undefined) {
       this.removeItem_(s0, s1, list, rtree);
@@ -273,7 +273,7 @@ WebGLPolygonReplay.prototype.bridgeHole_ = function(hole, holeMaxX,
     const intersection = this.calculateIntersection_(p1, p2, currSeg.p0,
       currSeg.p1, true);
     const dist = Math.abs(p1.x - intersection[0]);
-    if (dist < minDist && _ol_render_webgl_.triangleIsCounterClockwise(p1.x, p1.y,
+    if (dist < minDist && triangleIsCounterClockwise(p1.x, p1.y,
       currSeg.p0.x, currSeg.p0.y, currSeg.p1.x, currSeg.p1.y) !== undefined) {
       minDist = dist;
       p5 = {x: intersection[0], y: intersection[1], i: -1};
@@ -714,8 +714,8 @@ WebGLPolygonReplay.prototype.calculateIntersection_ = function(p0, p1, p2, p3, o
   if (denom !== 0) {
     const ua = ((p3.x - p2.x) * (p0.y - p2.y) - (p3.y - p2.y) * (p0.x - p2.x)) / denom;
     const ub = ((p1.x - p0.x) * (p0.y - p2.y) - (p1.y - p0.y) * (p0.x - p2.x)) / denom;
-    if ((!opt_touch && ua > _ol_render_webgl_.EPSILON && ua < 1 - _ol_render_webgl_.EPSILON &&
-        ub > _ol_render_webgl_.EPSILON && ub < 1 - _ol_render_webgl_.EPSILON) || (opt_touch &&
+    if ((!opt_touch && ua > EPSILON && ua < 1 - EPSILON &&
+        ub > EPSILON && ub < 1 - EPSILON) || (opt_touch &&
         ua >= 0 && ua <= 1 && ub >= 0 && ub <= 1)) {
       return [p0.x + ua * (p1.x - p0.x), p0.y + ua * (p1.y - p0.y)];
     }
@@ -1042,9 +1042,9 @@ WebGLPolygonReplay.prototype.setFillStrokeStyle = function(fillStyle, strokeStyl
       !(fillStyleColor instanceof CanvasPattern)) {
     fillStyleColor = asArray(fillStyleColor).map(function(c, i) {
       return i != 3 ? c / 255 : c;
-    }) || _ol_render_webgl_.defaultFillStyle;
+    }) || DEFAULT_FILLSTYLE;
   } else {
-    fillStyleColor = _ol_render_webgl_.defaultFillStyle;
+    fillStyleColor = DEFAULT_FILLSTYLE;
   }
   if (!this.state_.fillColor || !equals(fillStyleColor, this.state_.fillColor)) {
     this.state_.fillColor = fillStyleColor;
diff --git a/src/ol/render/webgl/TextReplay.js b/src/ol/render/webgl/TextReplay.js
index 0029df007d..298e54891e 100644
--- a/src/ol/render/webgl/TextReplay.js
+++ b/src/ol/render/webgl/TextReplay.js
@@ -7,7 +7,9 @@ import {createCanvasContext2D} from '../../dom.js';
 import GeometryType from '../../geom/GeometryType.js';
 import {CANVAS_LINE_DASH} from '../../has.js';
 import _ol_render_replay_ from '../replay.js';
-import _ol_render_webgl_ from '../webgl.js';
+import {DEFAULT_FILLSTYLE, DEFAULT_FONT, DEFAULT_LINECAP, DEFAULT_LINEDASH,
+  DEFAULT_LINEDASHOFFSET, DEFAULT_LINEJOIN, DEFAULT_LINEWIDTH, DEFAULT_MITERLIMIT,
+  DEFAULT_STROKESTYLE, DEFAULT_TEXTALIGN, DEFAULT_TEXTBASELINE} from '../webgl.js';
 import WebGLTextureReplay from '../webgl/TextureReplay.js';
 import AtlasManager from '../../style/AtlasManager.js';
 import WebGLBuffer from '../../webgl/Buffer.js';
@@ -356,7 +358,7 @@ WebGLTextReplay.prototype.setTextStyle = function(textStyle) {
     } else {
       const textFillStyleColor = textFillStyle.getColor();
       state.fillColor = asColorLike(textFillStyleColor ?
-        textFillStyleColor : _ol_render_webgl_.defaultFillStyle);
+        textFillStyleColor : DEFAULT_FILLSTYLE);
     }
     if (!textStrokeStyle) {
       state.strokeColor = null;
@@ -364,24 +366,24 @@ WebGLTextReplay.prototype.setTextStyle = function(textStyle) {
     } else {
       const textStrokeStyleColor = textStrokeStyle.getColor();
       state.strokeColor = asColorLike(textStrokeStyleColor ?
-        textStrokeStyleColor : _ol_render_webgl_.defaultStrokeStyle);
-      state.lineWidth = textStrokeStyle.getWidth() || _ol_render_webgl_.defaultLineWidth;
-      state.lineCap = textStrokeStyle.getLineCap() || _ol_render_webgl_.defaultLineCap;
-      state.lineDashOffset = textStrokeStyle.getLineDashOffset() || _ol_render_webgl_.defaultLineDashOffset;
-      state.lineJoin = textStrokeStyle.getLineJoin() || _ol_render_webgl_.defaultLineJoin;
-      state.miterLimit = textStrokeStyle.getMiterLimit() || _ol_render_webgl_.defaultMiterLimit;
+        textStrokeStyleColor : DEFAULT_STROKESTYLE);
+      state.lineWidth = textStrokeStyle.getWidth() || DEFAULT_LINEWIDTH;
+      state.lineCap = textStrokeStyle.getLineCap() || DEFAULT_LINECAP;
+      state.lineDashOffset = textStrokeStyle.getLineDashOffset() || DEFAULT_LINEDASHOFFSET;
+      state.lineJoin = textStrokeStyle.getLineJoin() || DEFAULT_LINEJOIN;
+      state.miterLimit = textStrokeStyle.getMiterLimit() || DEFAULT_MITERLIMIT;
       const lineDash = textStrokeStyle.getLineDash();
-      state.lineDash = lineDash ? lineDash.slice() : _ol_render_webgl_.defaultLineDash;
+      state.lineDash = lineDash ? lineDash.slice() : DEFAULT_LINEDASH;
     }
-    state.font = textStyle.getFont() || _ol_render_webgl_.defaultFont;
+    state.font = textStyle.getFont() || DEFAULT_FONT;
     state.scale = textStyle.getScale() || 1;
     this.text_ = /** @type {string} */ (textStyle.getText());
     const textAlign = _ol_render_replay_.TEXT_ALIGN[textStyle.getTextAlign()];
     const textBaseline = _ol_render_replay_.TEXT_ALIGN[textStyle.getTextBaseline()];
     this.textAlign_ = textAlign === undefined ?
-      _ol_render_webgl_.defaultTextAlign : textAlign;
+      DEFAULT_TEXTALIGN : textAlign;
     this.textBaseline_ = textBaseline === undefined ?
-      _ol_render_webgl_.defaultTextBaseline : textBaseline;
+      DEFAULT_TEXTBASELINE : textBaseline;
     this.offsetX_ = textStyle.getOffsetX() || 0;
     this.offsetY_ = textStyle.getOffsetY() || 0;
     this.rotateWithView = !!textStyle.getRotateWithView();