Re: [AD] BUG: Page flipping and the screen

[Eric Botcazou <ebotcazou@xxxxxxxxxx>]

> Are you sure? I thought it always points to the entire virtual screen,
> at least I'm almost sure that's how it used to be a few of years ago.
> The old way of page flipping (before the invention of
> create_video_bitmap()) was to use scroll_screen() and keep track of
> where to draw on the virtual screen.  So if the semantics of screen
> changes, I think it might break old programs.

I'm obviously a bit Windows-centric: I was only thinking of the platforms 
where the video memory is split into several pages. In this case, drawing 
onto the 'screen' bitmap would do nothing at all if it pointed to the 
backbuffer.

But now, after your remark, it seems pretty clear that the feature would not 
be portable to the platforms with one flat surface of video memory so it 
probably doesn't matter after all.

-- 
Eric Botcazou