Re: [MiNT] XaAES, some very simple dual-screen support?

[Alan Hourihane <alanh@fairlite.co.uk>]

On Thu, 2011-03-10 at 15:08 +0100, Peter Persson wrote:
> 10 mar 2011 kl. 14.58 skrev Alan Hourihane:
> 
> > Realistically we should add extensions to describe the size of each
> > display head. Then XaAES can query that and position it accordingly
> > based on what it sees as a primary screen, instead of hacking by 2.
> > 
> > You could think that having one screen at 1920x1200 and another at
> > 1024x768, that dividing by 2 won't work.
> 
> I see. The SuperVidel dual-desktop is based on two virtual screens, aligned to provide a single (very wide) framebuffer. This means that the VDI,nor the AES, is patched in any way to support this; logically it's just a single wide framebuffer.
> 
> We'll most probably never support different resolutions in dual-screen mode, but I understand that there needs to be a more sophisticated solution if someone else does. In such case, how much of that would go into the VDI, and how much would go into the AES? (I guess the VDI should provide a single rectangular display, but the AES would reserve some "hidden" area for the parts of the screen that are not really displayed).

I think the VDI is the right place to describe the physical screen
dimensions.

How we interpret and use that information is open for debate, but I
think you've been at the forefront of this support, so I'd be happy with
whatever you come up with for this.

Alan.