1 files changed, 17 insertions, 1 deletions
diff --git a/src/mbgl/renderer/render_layer.cpp b/src/mbgl/renderer/render_layer.cpp
index b92b28998c..f15dc7e6f4 100644
--- a/src/mbgl/renderer/render_layer.cpp
+++ b/src/mbgl/renderer/render_layer.cpp
@@ -48,7 +48,7 @@ bool RenderLayer::supportsZoom(float zoom) const {
 void RenderLayer::prepare(const LayerPrepareParameters& params) {
     assert(params.source);
     renderTiles = params.source->getRenderTiles();
-    assert(renderTiles);
+    addRenderPassesFromTiles();
 }
 
 optional<Color> RenderLayer::getSolidBackground() const {
@@ -86,5 +86,21 @@ void RenderLayer::checkRenderability(const PaintParameters& parameters,
     }
 }
 
+void RenderLayer::addRenderPassesFromTiles() {
+    assert(renderTiles);
+    for (const RenderTile& tile : *renderTiles) {
+        if (const LayerRenderData* renderData = tile.getLayerRenderData(*baseImpl)) {
+            passes |= RenderPass(renderData->layerProperties->renderPasses);
+        }
+    }
+}
+
+const LayerRenderData* RenderLayer::getRenderDataForPass(const RenderTile& tile, RenderPass pass) const {
+    if (const LayerRenderData* renderData = tile.getLayerRenderData(*baseImpl)) {
+        return bool(RenderPass(renderData->layerProperties->renderPasses) & pass) ? renderData : nullptr;
+    }
+    return nullptr;
+}
+
 } //namespace mbgl