1 files changed, 50 insertions, 0 deletions
diff --git a/src/mbgl/gfx/index_vector.hpp b/src/mbgl/gfx/index_vector.hpp
new file mode 100644
index 0000000000..b477c29782
--- /dev/null
+++ b/src/mbgl/gfx/index_vector.hpp
@@ -0,0 +1,50 @@
+#pragma once
+
+#include <mbgl/util/ignore.hpp>
+
+#include <vector>
+
+namespace mbgl {
+namespace gfx {
+
+template <class DrawMode>
+class IndexVector {
+public:
+    static constexpr std::size_t groupSize = DrawMode::bufferGroupSize;
+
+    template <class... Args>
+    void emplace_back(Args&&... args) {
+        static_assert(sizeof...(args) == groupSize, "wrong buffer element count");
+        util::ignore({ (v.emplace_back(std::forward<Args>(args)), 0)... });
+    }
+
+    std::size_t indexSize() const {
+        return v.size();
+    }
+
+    std::size_t byteSize() const {
+        return v.size() * sizeof(uint16_t);
+    }
+
+    bool empty() const {
+        return v.empty();
+    }
+
+    void clear() {
+        v.clear();
+    }
+
+    const uint16_t* data() const {
+        return v.data();
+    }
+
+    const std::vector<uint16_t>& vector() const {
+        return v;
+    }
+
+private:
+    std::vector<uint16_t> v;
+};
+
+} // namespace gfx
+} // namespace mbgl