lkml.org 
[lkml]   [2009]   [Jul]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: Support for synaptic touchscreen in HTC dream
Hi,

On Tue, Jul 14, 2009 at 10:25:45PM +0200, Andreas Mohr wrote:
> Hi,
>
> > + ts->snap_down[swapped] = -inactive_area_left;
> > + ts->snap_up[swapped] = max_x + inactive_area_right;
> > + ts->snap_down[!swapped] = -inactive_area_top;
> > + ts->snap_up[!swapped] = max_y + inactive_area_bottom;
> > + ts->snap_down_on[swapped] = snap_left_on;
> > + ts->snap_down_off[swapped] = snap_left_off;
> > + ts->snap_up_on[swapped] = max_x - snap_right_on;
> > + ts->snap_up_off[swapped] = max_x - snap_right_off;
> > + ts->snap_down_on[!swapped] = snap_top_on;
> > + ts->snap_down_off[!swapped] = snap_top_off;
> > + ts->snap_up_on[!swapped] = max_y - snap_bottom_on;
> > + ts->snap_up_off[!swapped] = max_y - snap_bottom_off;
>
> Could this perhaps be represented by _one_ struct definition
> and two representations of it, one for swapped and one for non-swapped case or so?
> (although sometimes it´s reverted logic, might need more thought)
> Sounds like an awful lot of repeated array calculations for no overly good reason
> (unless gcc happens to fully optimize it into oblivion automatically).

-ETOOMUCHBEER

Of course we need to swap orthogonal members individually,
thus this kind of code.
However maybe there´s still a more elegant way of doing this.

Andreas Mohr
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2009-07-14 22:37    [from the cache]
©2003-2014 Jasper Spaans. Advertise on this site