Is MySQL query cache buffer common/shared for all storage engines?

[lalit Choudhary]

Is MySQL Query cache buffer common for all storage engines ? or it's separate for each storage engine in their buffer pool.
Example InnoDB has it own innodb buffer pool , so i'm assuming that inside this innodb buffer pool it will have query cache for innodb tables on storage level engine. And, for MyISAM table we have server level query cache.