#define GL_CONTEXT_FLAG_DEBUG_BIT 0x00000002
#define GL_CONTEXT_FLAG_DEBUG_BIT_KHR 0x00000002
#define GL_CONTEXT_FLAG_ROBUST_ACCESS_BIT 0x00000004
+#define GL_CONTEXT_FLAG_NO_ERROR_BIT_KHR 0x00000008
#define GL_CONTEXT_CORE_PROFILE_BIT 0x00000001
#define GL_CONTEXT_COMPATIBILITY_PROFILE_BIT 0x00000002
#define GL_MAP_READ_BIT 0x0001