make most headers private

src/mbgl/geometry/elements_buffer.cpp

@@ -0,0 +1,21 @@
+#include <mbgl/geometry/elements_buffer.hpp>
+
+using namespace mbgl;
+
+void TriangleElementsBuffer::add(element_type a, element_type b, element_type c) {
+    element_type *elements = static_cast<element_type *>(addElement());
+    elements[0] = a;
+    elements[1] = b;
+    elements[2] = c;
+}
+
+void LineElementsBuffer::add(element_type a, element_type b) {
+    element_type *elements = static_cast<element_type *>(addElement());
+    elements[0] = a;
+    elements[1] = b;
+}
+
+void PointElementsBuffer::add(element_type a) {
+    uint16_t *data = static_cast<element_type *>(addElement());
+    data[0] = a;
+}