1GL_REGAL_log
2https://github.com/p3/regal/tree/master/doc/extensions
3GL_REGAL_log
4
5	GL_LOG_ERROR_REGAL 0x9319
6	GL_LOG_WARNING_REGAL 0x931A
7	GL_LOG_INFO_REGAL 0x931B
8	GL_LOG_APP_REGAL 0x931C
9	GL_LOG_DRIVER_REGAL 0x931D
10	GL_LOG_INTERNAL_REGAL 0x931E
11	GL_LOG_DEBUG_REGAL 0x931F
12	GL_LOG_STATUS_REGAL 0x9320
13	GL_LOG_HTTP_REGAL 0x9321
14	void glLogMessageCallbackREGAL (GLLOGPROCREGAL callback)
15	typedef void (APIENTRY *GLLOGPROCREGAL)(GLenum stream, GLsizei length, const GLchar *message, void *context)
16