Re: [AD] al_clear

[Thomas Fjellstrom <tfjellstrom@xxxxxxxxxx>]

On Thu March 12 2009, Milan Mimica wrote:
> Peter Wang wrote:
> >> Let's have a function:
> >> void al_clear_screen() { // or rather al_clear_bakbuffer()
> >> old = al_get_target_bitmap();
> >> al_set_target_bitmap(al_get_backbuffer());
> >> al_clear_target_bitmap();
> >> if (old != al_get_backbuffer())
> >> al_set_target_bitmap(old);
> >> }
> >>
> >> and make a promise we won't do this with every drawing function.
> >
> > I don't think it's very useful to clear the backbuffer while keeping
> > the target bitmap as something else. Usually you'd clear the backbuffer
> > as a precursor to drawing onto it.
>
> But you sure wouldn't like al_clear_screen() to change the target bitmap.
> What you see here are implementation details. The point is, we can have
> both al_clear_screen() and al_clear_target_bitmap().

I'm not sure anyone was suggesting having a "al_clear_screen" that always acted on the "screen". Just a function that clears the active target, as thats essentially what the screen is going to be at any given time (even if it isn't you want it to be).

>
> --
> Milan Mimica
> http://sparklet.sf.net
>
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--
Thomas Fjellstrom
tfjellstrom@xxxxxxxxxx