No composeFrame if prepareFrame returns false

src/ol/renderer/canvas/canvasimagelayerrenderer.js

@@ -143,4 +143,5 @@ ol.renderer.canvas.ImageLayer.prototype.prepareFrame =
     this.updateLogos(frameState, imageSource);
   }
 
+  return true;
 };

src/ol/renderer/canvas/canvasmaprenderer.js

@@ -188,8 +188,9 @@ ol.renderer.canvas.Map.prototype.renderFrame = function(frameState) {
         layerState.sourceState != ol.source.State.READY) {
       continue;
     }
-    layerRenderer.prepareFrame(frameState, layerState);
-    layerRenderer.composeFrame(frameState, layerState, context);
+    if (layerRenderer.prepareFrame(frameState, layerState)) {
+      layerRenderer.composeFrame(frameState, layerState, context);
+    }
   }
 
   this.dispatchComposeEvent_(ol.render.EventType.POSTCOMPOSE, frameState);

src/ol/renderer/canvas/canvastilelayerrenderer.js

@@ -415,4 +415,5 @@ ol.renderer.canvas.TileLayer.prototype.prepareFrame =
       (origin[0] - center[0]) / tilePixelResolution,
       (center[1] - origin[1]) / tilePixelResolution);
 
+  return true;
 };

src/ol/renderer/canvas/canvasvectorlayerrenderer.js

@@ -176,7 +176,7 @@ ol.renderer.canvas.VectorLayer.prototype.prepareFrame =
 
   if (!this.dirty_ && (frameState.viewHints[ol.ViewHint.ANIMATING] ||
       frameState.viewHints[ol.ViewHint.INTERACTING])) {
-    return;
+    return true;
   }
 
   var frameStateExtent = frameState.extent;
@@ -195,7 +195,7 @@ ol.renderer.canvas.VectorLayer.prototype.prepareFrame =
       this.renderedRevision_ == vectorLayerRevision &&
       this.renderedRenderOrder_ == vectorLayerRenderOrder &&
       ol.extent.containsExtent(this.renderedExtent_, frameStateExtent)) {
-    return;
+    return true;
   }
 
   var extent = this.renderedExtent_;
@@ -258,6 +258,7 @@ ol.renderer.canvas.VectorLayer.prototype.prepareFrame =
   this.renderedRenderOrder_ = vectorLayerRenderOrder;
   this.replayGroup_ = replayGroup;
 
+  return true;
 };