1 files changed, 27 insertions, 0 deletions
diff --git a/src/mbgl/renderer/render_layer.cpp b/src/mbgl/renderer/render_layer.cpp
index 396fc64b2d..7d02ccb050 100644
--- a/src/mbgl/renderer/render_layer.cpp
+++ b/src/mbgl/renderer/render_layer.cpp
@@ -31,6 +31,33 @@ LayerRenderItem RenderLayer::createRenderItem() {
     };
 }
 
+void LayerRenderItem::checkRenderability(const PaintParameters& parameters,
+                                         const uint32_t activeBindingCount) const {
+    // Only warn once for every layer.
+    if (hasRenderFailures) {
+        return;
+    }
+    std::string layerId = evaluatedProperties->baseImpl->id;
+    if (activeBindingCount > parameters.context.maximumVertexBindingCount) {
+        Log::Info(Event::OpenGL,
+                "The layer '%s' uses more data-driven properties than the current device "
+                "supports, and will have rendering errors. To ensure compatibility with this "
+                "device, use %d fewer data driven properties in this layer.",
+                layerId.c_str(),
+                activeBindingCount - parameters.context.minimumRequiredVertexBindingCount);
+        hasRenderFailures = true;
+    } else if (activeBindingCount > parameters.context.minimumRequiredVertexBindingCount) {
+        Log::Info(Event::OpenGL,
+                "The layer '%s' uses more data-driven properties than some devices may support. "
+                "Though it will render correctly on this device, it may have rendering errors "
+                "on other devices. To ensure compatibility with all devices, use %d fewer "
+                "data-driven properties in this layer.",
+                layerId.c_str(),
+                activeBindingCount - parameters.context.minimumRequiredVertexBindingCount);
+        hasRenderFailures = true;
+    }
+}
+
 LayerRenderer RenderLayer::createRenderer() {
     return [this](PaintParameters& pass, const LayerRenderItem&){ render(pass); };
 }