Re: [AD] al_update_display_region

[Milan Mimica <milan.mimica@xxxxxxxxxx>]

Elias Pschernig wrote:
> Something like A4's old X11 driver also would implement it. I think it
> should be more a hint to the display driver, something like "do an
> al_flip_display, but really only this rectangle would require updating".
>
> If you want to have two code pathes, one with a DRS, one without, you
> likely want to know this at the start of the program - not later when
> you actually try to call the function.

Okay, that makes sense.

I don't think it should be a flag, but a option.
al_get_display_option(ALLEGRO_UPDATE_DISPLAY_REGION) will indicate whether
a) al_update_display_region() does nothing
b) acts as a hint
c) does what the name says

If it's a hint you'll still want to render the entire frame to the backbuffer, 
but specify the rectangle that has been updated and hope it helps.



--
Milan Mimica
http://sparklet.sf.net