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dix: undo transformation for missing valuators (#49347)

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last.valuators contains the transformed valuators of the device. If the
device submits events with x/y missing, we need to get that from
last.valuators and undo the transformation to that axis.

X.Org Bug 49347 <http://bugs.freedesktop.org/show_bug.cgi?id=49347>

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Chase Douglas <chase.douglas@canonical.com>
This commit is contained in:
Peter Hutterer 2012-05-09 11:30:46 +10:00
parent 03318835a5
commit 749a593e49
1 changed files with 21 additions and 4 deletions
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25
dix/getevents.c
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@ -1166,16 +1166,33 @@ static void
transformAbsolute(DeviceIntPtr dev, ValuatorMask *mask)
{
double x, y, ox, oy;
int has_x, has_y;
has_x = valuator_mask_fetch_double(mask, 0, &ox);
has_y = valuator_mask_fetch_double(mask, 1, &oy);
if (!has_x && !has_y)
return;
if (!has_x || !has_y) {
struct pixman_f_transform invert;
/* undo transformation from last event */
ox = dev->last.valuators[0];
oy = dev->last.valuators[1];
pixman_f_transform_invert(&invert, &dev->transform);
transform(&invert, &ox, &oy);
x = ox;
y = oy;
}
if (valuator_mask_isset(mask, 0))
ox = x = valuator_mask_get_double(mask, 0);
else
ox = x = dev->last.valuators[0];
if (valuator_mask_isset(mask, 1))
oy = y = valuator_mask_get_double(mask, 1);
else
oy = y = dev->last.valuators[1];
transform(&dev->transform, &x, &y);