[SDL] Displaying SDL content in an existing Window...

[Sam Lantinga]

> But of course it would be nice if SDL had the MakeSubSurface and
> FreeSubSurface functions - then the "hack" could be maintained
> along with SDL ;)

You can actually already do this with the SDL_CreateRGBSurfaceFrom()
function.  Just pass in the correct base address (precalculated from
the x/y address) and give the pitch for the original data.

SDL will not free the pixels data from a surface allocated this way,
and it should work as a normal surface in all other respects.

See ya!
	-Sam Lantinga, Lead Programmer, Loki Software, Inc.