what's this sentence meanings?

"To fog my mind with pleasure" is a fancy of saying "To fill my mind with pleasant thoughts"; in this context it might even mean "to hallucinate." This sentence is saying: My mind was filled with so many pleasant thoughts that I forgot my father's warning.

Breaking the sentence down into its component parts would look something like this:

IT = subject
ALL = modifier of "it" ("it all" is a shorthand way to write "all of it")
SERVED = verb
TO FOG = infinitive modifier (of "served")
MY MIND = direct object (of "served to fog")
WITH PLEASURE = prepositional phrase
SO THAT = coordinating conjunction (links the 1st independent clause ["It all served to fog my mind..."] to the 2nd ["I forgot my father's repeated warning."])
I = subject of the 2nd independent clause
FORGOT = verb of my 2nd independent clause
MY FATHER'S ... WARNING = direct object
REPEATED = adjective modifying "warning"

Hi, Shapeless! I, as an onlooker, admire your analyzing ability and patience too.

Just drop by to say thanks!

You're very welcome. Many other A2Kers are doing what they can to help as well.