[freesci-develop] cvs: cvsuser

[freesci-develop]

CVSROOT:        /home/cvs
Module name:    freesci
Changes by:     cvsuser 01/04/12 17:10:41

Modified files:
        src/gfx/drivers: sdl_driver.c 

Log message:
1) Cleaned up the alpha code so that it's all there, but disabled until
we can sort out what's going on.  (interestingly enough, the
per-surface alpha works fine)
2) When mapping colors, use 255 as transparent, and 0 is opaque,
opposite of SDL conventions.  (at least until Crispoph's #ifdefs are
checked in)
3) re-wrote most of sdl_update -- now there's one fewer bitblit involved
when updatng the display surface.   That ought to make things a
little faster...