GL_EXT_timer_query http://www.nvidia.com/dev_content/nvopenglspecs/GL_EXT_timer_query.txt GL_EXT_timer_query GL_TIME_ELAPSED_EXT 0x88BF void glGetQueryObjecti64vEXT (GLuint id, GLenum pname, GLint64EXT *params) void glGetQueryObjectui64vEXT (GLuint id, GLenum pname, GLuint64EXT *params)