Use named imports from extent

src/ol/renderer/webgl/ImageLayer.js

@@ -6,7 +6,7 @@ import {inherits, nullFunction} from '../../index.js';
 import _ol_LayerType_ from '../../LayerType.js';
 import _ol_ViewHint_ from '../../ViewHint.js';
 import _ol_dom_ from '../../dom.js';
-import _ol_extent_ from '../../extent.js';
+import {getIntersection, isEmpty} from '../../extent.js';
 import _ol_functions_ from '../../functions.js';
 import _ol_renderer_Type_ from '../Type.js';
 import _ol_renderer_webgl_Layer_ from '../webgl/Layer.js';
@@ -137,11 +137,10 @@ _ol_renderer_webgl_ImageLayer_.prototype.prepareFrame = function(frameState, lay
 
   var renderedExtent = frameState.extent;
   if (layerState.extent !== undefined) {
-    renderedExtent = _ol_extent_.getIntersection(
-        renderedExtent, layerState.extent);
+    renderedExtent = getIntersection(renderedExtent, layerState.extent);
   }
   if (!hints[_ol_ViewHint_.ANIMATING] && !hints[_ol_ViewHint_.INTERACTING] &&
-      !_ol_extent_.isEmpty(renderedExtent)) {
+      !isEmpty(renderedExtent)) {
     var projection = viewState.projection;
     if (!ENABLE_RASTER_REPROJECTION) {
       var sourceProjection = imageSource.getProjection();

src/ol/renderer/webgl/TileLayer.js

@@ -9,7 +9,7 @@ import _ol_LayerType_ from '../../LayerType.js';
 import _ol_TileRange_ from '../../TileRange.js';
 import _ol_TileState_ from '../../TileState.js';
 import _ol_array_ from '../../array.js';
-import _ol_extent_ from '../../extent.js';
+import {createEmpty, intersects} from '../../extent.js';
 import _ol_math_ from '../../math.js';
 import _ol_renderer_Type_ from '../Type.js';
 import _ol_renderer_webgl_Layer_ from '../webgl/Layer.js';
@@ -246,7 +246,7 @@ _ol_renderer_webgl_TileLayer_.prototype.prepareFrame = function(frameState, laye
 
     var useInterimTilesOnError = tileLayer.getUseInterimTilesOnError();
     var allTilesLoaded = true;
-    var tmpExtent = _ol_extent_.createEmpty();
+    var tmpExtent = createEmpty();
     var tmpTileRange = new _ol_TileRange_(0, 0, 0, 0);
     var childTileRange, drawable, fullyLoaded, tile, tileState;
     var x, y, tileExtent;
@@ -257,7 +257,7 @@ _ol_renderer_webgl_TileLayer_.prototype.prepareFrame = function(frameState, laye
         if (layerState.extent !== undefined) {
           // ignore tiles outside layer extent
           tileExtent = tileGrid.getTileCoordExtent(tile.tileCoord, tmpExtent);
-          if (!_ol_extent_.intersects(tileExtent, layerState.extent)) {
+          if (!intersects(tileExtent, layerState.extent)) {
             continue;
           }
         }

src/ol/renderer/webgl/VectorLayer.js

@@ -4,7 +4,7 @@
 import {getUid, inherits} from '../../index.js';
 import _ol_LayerType_ from '../../LayerType.js';
 import _ol_ViewHint_ from '../../ViewHint.js';
-import _ol_extent_ from '../../extent.js';
+import {buffer, containsExtent, createEmpty} from '../../extent.js';
 import _ol_render_webgl_ReplayGroup_ from '../../render/webgl/ReplayGroup.js';
 import _ol_renderer_Type_ from '../Type.js';
 import _ol_renderer_vector_ from '../vector.js';
@@ -44,7 +44,7 @@ var _ol_renderer_webgl_VectorLayer_ = function(mapRenderer, vectorLayer) {
    * @private
    * @type {ol.Extent}
    */
-  this.renderedExtent_ = _ol_extent_.createEmpty();
+  this.renderedExtent_ = createEmpty();
 
   /**
    * @private
@@ -241,14 +241,14 @@ _ol_renderer_webgl_VectorLayer_.prototype.prepareFrame = function(frameState, la
     vectorLayerRenderOrder = _ol_renderer_vector_.defaultOrder;
   }
 
-  var extent = _ol_extent_.buffer(frameStateExtent,
+  var extent = buffer(frameStateExtent,
       vectorLayerRenderBuffer * resolution);
 
   if (!this.dirty_ &&
       this.renderedResolution_ == resolution &&
       this.renderedRevision_ == vectorLayerRevision &&
       this.renderedRenderOrder_ == vectorLayerRenderOrder &&
-      _ol_extent_.containsExtent(this.renderedExtent_, extent)) {
+      containsExtent(this.renderedExtent_, extent)) {
     return true;
   }