[Freeciv-Dev] Re: different iso drawing algorithms

[Raimar Falke <rf13@xxxxxxxxxxxxxxxxx>]

On Sun, Dec 15, 2002 at 07:04:04AM -0500, Jason Short wrote:
> On Sun, 2002-12-15 at 06:54, Raimar Falke wrote:
> > On Sat, Dec 14, 2002 at 06:06:27PM -0500, Jason Short wrote:
> > > On Sat, 2002-12-14 at 17:49, Raimar Falke wrote:
> > > > On Sat, Dec 14, 2002 at 05:14:46PM -0500, Jason Short wrote:
> 
> > > > > - Below-animation gfx versus above-animation gfx.  Since the city
> > > > > descriptions are normally drawn above units, it makes sense that they
> > > > > should be drawn above unit animations.  Extending this idea, we can 
> > > > > put
> > > > > all animation gfx (including nukes, combat, etc.) on the same layer,
> > > > > with graphics below and above.
> > > > 
> > > > I don't see what this buys us.
> > > 
> > > This gives better drawing quality!
> > 
> > It is possible to draw the animation on the first backing store. It
> > may cause some extra refreshes but these are local (4 tiles for a
> > move), uncommon and you also don't get flicker with this. Advantage is
> > that you don't need a third layer which is most of the time empty and
> > increase the cost of the normal draws.
> 
> Here I am not talking about flicker but about having the texts not
> disappear when single-tile updates and animations happen.  I do not know
> of any other way to do this besides having a separate buffer.

So what is the problem? Current situation (drawn in this order):
 1) tiles (from backing store)
 2) city descriptions
 3) animations

Proposed:
 1) tiles and animation (from first backing store)
 2) city descriptions (from second backing store)

        Raimar

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