case TRIANGLES: return VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST;
case TRIANGLE_STRIP: return VK_PRIMITIVE_TOPOLOGY_TRIANGLE_STRIP;
case TRIANGLE_FAN: return VK_PRIMITIVE_TOPOLOGY_TRIANGLE_FAN;
case TRIANGLES: return VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST;
case TRIANGLE_STRIP: return VK_PRIMITIVE_TOPOLOGY_TRIANGLE_STRIP;
case TRIANGLE_FAN: return VK_PRIMITIVE_TOPOLOGY_TRIANGLE_FAN;