1 files changed, 54 insertions, 0 deletions
diff --git a/include/mbgl/geometry/elements_buffer.hpp b/include/mbgl/geometry/elements_buffer.hpp
new file mode 100644
index 0000000000..ed60338e08
--- /dev/null
+++ b/include/mbgl/geometry/elements_buffer.hpp
@@ -0,0 +1,54 @@
+#ifndef MBGL_GEOMETRY_TRIANGLE_ELEMENTS_BUFFER
+#define MBGL_GEOMETRY_TRIANGLE_ELEMENTS_BUFFER
+
+#include <mbgl/geometry/buffer.hpp>
+#include <mbgl/geometry/vao.hpp>
+
+namespace mbgl {
+
+struct ElementGroup {
+    VertexArrayObject array;
+    uint32_t vertex_length;
+    uint32_t elements_length;
+
+    ElementGroup() : vertex_length(0), elements_length(0) {}
+    ElementGroup(uint32_t vertex_length, uint32_t elements_length)
+        : vertex_length(vertex_length),
+          elements_length(elements_length) {
+    }
+};
+
+class TriangleElementsBuffer : public Buffer<
+    6, // bytes per triangle (3 * unsigned short == 6 bytes)
+    GL_ELEMENT_ARRAY_BUFFER
+> {
+public:
+    typedef uint16_t element_type;
+
+    void add(element_type a, element_type b, element_type c);
+};
+
+
+class LineElementsBuffer : public Buffer<
+    4, // bytes per triangle (2 * unsigned short == 6 bytes)
+    GL_ELEMENT_ARRAY_BUFFER
+> {
+public:
+    typedef uint16_t element_type;
+
+    void add(element_type a, element_type b);
+};
+
+class PointElementsBuffer : public Buffer<
+    2, // bytes per point (1 unsigned short)
+    GL_ELEMENT_ARRAY_BUFFER
+> {
+public:
+    typedef uint16_t element_type;
+
+    void add(element_type a);
+};
+
+}
+
+#endif