From f76b9bdd0720c5e523cb2ffbb66627fd365deca1 Mon Sep 17 00:00:00 2001
From: Frederic Junod <frederic.junod@camptocamp.com>
Date: Tue, 14 May 2019 15:33:44 +0200
Subject: [PATCH] Only apply canvas transform if the tiles are scales

---
 src/ol/renderer/canvas/VectorTileLayer.js | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/ol/renderer/canvas/VectorTileLayer.js b/src/ol/renderer/canvas/VectorTileLayer.js
index 3b6eca9bff..7dd1fabf21 100644
--- a/src/ol/renderer/canvas/VectorTileLayer.js
+++ b/src/ol/renderer/canvas/VectorTileLayer.js
@@ -619,10 +619,12 @@ class CanvasVectorTileLayerRenderer extends CanvasTileLayerRenderer {
     const size = source.getTilePixelSize(z, pixelRatio, projection);
     context.canvas.width = size[0];
     context.canvas.height = size[1];
-    const canvasTransform = resetTransform(this.tmpTransform_);
     const renderScale = pixelRatio / renderPixelRatio;
-    scaleTransform(canvasTransform, renderScale, renderScale);
-    context.setTransform.apply(context, canvasTransform);
+    if (renderScale !== 1) {
+      const canvasTransform = resetTransform(this.tmpTransform_);
+      scaleTransform(canvasTransform, renderScale, renderScale);
+      context.setTransform.apply(context, canvasTransform);
+    }
     const tileExtent = tileGrid.getTileCoordExtent(tileCoord, this.tmpExtent);
     for (let i = 0, ii = executorGroups.length; i < ii; ++i) {
       const executorGroup = executorGroups[i];