1GL_ARB_timer_query 2http://www.opengl.org/registry/specs/ARB/timer_query.txt 3GL_ARB_timer_query 4 GL_TIME_ELAPSED 0x88BF 5 GL_TIMESTAMP 0x8E28 6 void glGetQueryObjecti64v (GLuint id, GLenum pname, GLint64* params) 7 void glGetQueryObjectui64v (GLuint id, GLenum pname, GLuint64* params) 8 void glQueryCounter (GLuint id, GLenum target) 9