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dix: Save touchpoint last coordinates before transform. #49347

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DDXTouchPointInfoRec.valuators used to store axis values after transform.
This resulted in Coordinate Transformation Matrix
being applied multiple times to the last coordinates,
in the case when only pressure changes in the last touch event.

Changed DDXTouchPointInfoRec.valuators to store values before transform.

Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=49347

Signed-off-by: Yuly Novikov <ynovikov@chromium.org>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
This commit is contained in:
Yuly Novikov 2012-11-19 21:04:57 -05:00 committed by Peter Hutterer
parent d0fd592fc7
commit 3b9f1c7017
2 changed files with 9 additions and 15 deletions
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22
dix/getevents.c
View File

@ -1910,30 +1910,24 @@ GetTouchEvents(InternalEvent *events, DeviceIntPtr dev, uint32_t ddx_touchid,
return 0;
}
if (t->mode == XIDirectTouch) {
if (!valuator_mask_isset(&mask, 0))
valuator_mask_set_double(&mask, 0,
valuator_mask_get_double(ti->
valuators, 0));
if (!valuator_mask_isset(&mask, 1))
valuator_mask_set_double(&mask, 1,
valuator_mask_get_double(ti->
valuators, 1));
}
/* Get our screen event co-ordinates (root_x/root_y/event_x/event_y):
* these come from the touchpoint in Absolute mode, or the sprite in
* Relative. */
if (t->mode == XIDirectTouch) {
transformAbsolute(dev, &mask);
for (i = 0; i < valuator_mask_size(&mask); i++) {
for (i = 0; i < max(valuator_mask_size(&mask), 2); i++) {
double val;
if (valuator_mask_fetch_double(&mask, i, &val))
valuator_mask_set_double(ti->valuators, i, val);
/* If the device doesn't post new X and Y axis values,
* use the last values posted.
*/
else if (i < 2 &&
valuator_mask_fetch_double(ti->valuators, i, &val))
valuator_mask_set_double(&mask, i, val);
}
transformAbsolute(dev, &mask);
clipAbsolute(dev, &mask);
}
else {

2
include/inputstr.h
View File

@ -331,7 +331,7 @@ typedef struct _DDXTouchPointInfo {
uint32_t ddx_id; /* touch ID given by the DDX */
Bool emulate_pointer;
ValuatorMask *valuators; /* last recorded axis values */
ValuatorMask *valuators; /* last axis values as posted, pre-transform */
} DDXTouchPointInfoRec;
typedef struct _TouchClassRec {