1 files changed, 21 insertions, 0 deletions
diff --git a/src/mbgl/gfx/attribute.cpp b/src/mbgl/gfx/attribute.cpp
new file mode 100644
index 0000000000..ed5d4032f4
--- /dev/null
+++ b/src/mbgl/gfx/attribute.cpp
@@ -0,0 +1,21 @@
+#include <mbgl/gfx/attribute.hpp>
+
+#include <limits>
+#include <cassert>
+
+namespace mbgl {
+namespace gfx {
+
+optional<AttributeBinding> offsetAttributeBinding(const optional<AttributeBinding>& binding, std::size_t vertexOffset) {
+    assert(vertexOffset <= std::numeric_limits<uint32_t>::max());
+    if (binding) {
+        AttributeBinding result = *binding;
+        result.vertexOffset = static_cast<uint32_t>(vertexOffset);
+        return result;
+    } else {
+        return binding;
+    }
+}
+
+} // namespace gfx
+} // namespace mbgl