How to Modify Tile Data ? (callback or any structure to decode my tile data)

[MostafaSh]

summery ->
in our company, we use our own tile servers. we encode both tile-urls and Tile data in some way for protecting our data.
now, we are going to start using mapbox-gl in our webApps.

problem ->
I cannot find the callback or any solution to modifying each tile data after they've got fetched. it seems there is no solution defined in docs or forums.

what I am seeking for ->
if there is any solution defined already, please leave a sample or the address to it's doc for me.
if there is no solution, is there any upcoming release of mapbox-gl wich provides any solution for my problem? if there is, is there any timing for it?

[mourner]

There's currently no way to do that directly through the API — you'll either have to modify the source code, or try an undocumented custom sources API discussed in #2920. Unfortunately we have no timeline for improvements on that front at the moment.