14using gl::GL_CONTEXT_CORE_PROFILE_BIT;
15using gl::GL_CONTEXT_FLAG_FORWARD_COMPATIBLE_BIT;
16using gl::GL_SYNC_FLUSH_COMMANDS_BIT;
17using gl::GL_VERTEX_SHADER_BIT;
18using gl::GL_CONTEXT_COMPATIBILITY_PROFILE_BIT;
19using gl::GL_FRAGMENT_SHADER_BIT;
20using gl::GL_GEOMETRY_SHADER_BIT;
21using gl::GL_TESS_CONTROL_SHADER_BIT;
22using gl::GL_TESS_EVALUATION_SHADER_BIT;
23using gl::GL_DEPTH_BUFFER_BIT;
24using gl::GL_STENCIL_BUFFER_BIT;
25using gl::GL_COLOR_BUFFER_BIT;
26using gl::GL_MAP_READ_BIT;
27using gl::GL_MAP_WRITE_BIT;
28using gl::GL_MAP_INVALIDATE_RANGE_BIT;
29using gl::GL_MAP_INVALIDATE_BUFFER_BIT;
30using gl::GL_MAP_FLUSH_EXPLICIT_BIT;
31using gl::GL_MAP_UNSYNCHRONIZED_BIT;
32using gl::GL_ALL_SHADER_BITS;