Re: [AD] al_clear

[Thomas F. <tfj...@sh...>]

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
tfj...@sh...