1 files changed, 14 insertions, 1 deletions
diff --git a/src/mbgl/gfx/vertex_buffer.hpp b/src/mbgl/gfx/vertex_buffer.hpp
index 2ed1e62759..fe98ec6505 100644
--- a/src/mbgl/gfx/vertex_buffer.hpp
+++ b/src/mbgl/gfx/vertex_buffer.hpp
@@ -1,6 +1,7 @@
 #pragma once
 
 #include <memory>
+#include <cassert>
 
 namespace mbgl {
 namespace gfx {
@@ -17,8 +18,20 @@ public:
 template <class>
 class VertexBuffer {
 public:
+    VertexBuffer(const std::size_t elements_, std::unique_ptr<VertexBufferResource>&& resource_)
+        : elements(elements_), resource(std::move(resource_)) {
+    }
+
     std::size_t elements;
-    std::unique_ptr<const VertexBufferResource> resource;
+
+    template <typename T = VertexBufferResource>
+    T& getResource() const {
+        assert(resource);
+        return static_cast<T&>(*resource);
+    }
+
+protected:
+    std::unique_ptr<VertexBufferResource> resource;
 };
 
 } // namespace gfx