[PATCH evdev 3/3] Dummy process MT events (protocol A). (rev2)
Benjamin Tissoires
tissoire at cena.fr
Sun May 30 06:11:14 PDT 2010
In case the driver receives a mt event, it stores it at the first
available place, i.e. it does not overrides older mt values.
At the end, in the EV_SYNC event, it only sends the values it has
filled.
Signed-off-by: Benjamin Tissoires <tissoire at cena.fr>
---
src/evdev.c | 36 +++++++++++++++++++++++++++++++++---
src/evdev.h | 1 +
2 files changed, 34 insertions(+), 3 deletions(-)
diff --git a/src/evdev.c b/src/evdev.c
index 10fe81b..39a5047 100644
--- a/src/evdev.c
+++ b/src/evdev.c
@@ -412,6 +412,8 @@ EvdevProcessValuators(InputInfoPtr pInfo, int v[MAX_VALUATORS], int *num_v,
*/
else if (pEvdev->abs && pEvdev->tool) {
memcpy(v, pEvdev->vals, sizeof(int) * pEvdev->num_vals);
+ if (pEvdev->mt_current_touchpoint > pEvdev->mt_max_touchpoints)
+ pEvdev->mt_current_touchpoint = pEvdev->mt_max_touchpoints;
if (pEvdev->swap_axes) {
int tmp = v[0];
@@ -438,7 +440,8 @@ EvdevProcessValuators(InputInfoPtr pInfo, int v[MAX_VALUATORS], int *num_v,
v[1] = (pEvdev->absinfo[ABS_Y].maximum - v[1] +
pEvdev->absinfo[ABS_Y].minimum);
- *num_v = pEvdev->num_vals;
+ *num_v = pEvdev->num_vals - (pEvdev->mt_max_touchpoints -
+ pEvdev->mt_current_touchpoint) * pEvdev->mt_num_valuators;
*first_v = 0;
}
}
@@ -540,7 +543,15 @@ EvdevProcessAbsoluteMotionEvent(InputInfoPtr pInfo, struct input_event *ev)
if (EvdevWheelEmuFilterMotion(pInfo, ev))
return;
- pEvdev->vals[pEvdev->axis_map[ev->code]] = value;
+ if (ev->code < ABS_MT_TOUCH_MAJOR)
+ pEvdev->vals[pEvdev->axis_map[ev->code]] = value;
+ else if (pEvdev->mt_current_touchpoint < pEvdev->mt_max_touchpoints) {
+ /* MT value -> store it at the first available place */
+ pEvdev->vals[pEvdev->axis_map[ev->code] +
+ pEvdev->mt_current_touchpoint * pEvdev->mt_num_valuators] = value;
+ } else
+ return; /* mt-event, but not enough place to store it */
+
if (ev->code == ABS_X)
pEvdev->abs |= ABS_X_VALUE;
else if (ev->code == ABS_Y)
@@ -682,6 +693,22 @@ EvdevProcessSyncEvent(InputInfoPtr pInfo, struct input_event *ev)
pEvdev->num_queue = 0;
pEvdev->abs = 0;
pEvdev->rel = 0;
+ pEvdev->mt_current_touchpoint = 0;
+}
+
+/**
+ * Process the event SYN_MT_REPORT.
+ *
+ * This event is required only in the mt-protocol A (the oldest one). This
+ * protocol now handles devices that does not make tracking, so the processing
+ * consists in incrementing mt_current_touchpoint to be able to place the next
+ * mt-event after this one in the list of valuators.
+ */
+static void
+EvdevProcessMTSyncReport(InputInfoPtr pInfo, struct input_event *ev)
+{
+ EvdevPtr pEvdev = pInfo->private;
+ pEvdev->mt_current_touchpoint++;
}
/**
@@ -702,7 +729,10 @@ EvdevProcessEvent(InputInfoPtr pInfo, struct input_event *ev)
EvdevProcessKeyEvent(pInfo, ev);
break;
case EV_SYN:
- EvdevProcessSyncEvent(pInfo, ev);
+ if (ev->code == SYN_MT_REPORT)
+ EvdevProcessMTSyncReport(pInfo, ev);
+ else
+ EvdevProcessSyncEvent(pInfo, ev);
break;
}
}
diff --git a/src/evdev.h b/src/evdev.h
index 852f06c..49733a7 100644
--- a/src/evdev.h
+++ b/src/evdev.h
@@ -197,6 +197,7 @@ typedef struct {
unsigned int mt_num_valuators;
unsigned int mt_max_touchpoints; /* the number of simultaneous touchpoints
* the device can support */
+ unsigned int mt_current_touchpoint;
} EvdevRec, *EvdevPtr;
/* Event posting functions */
--
1.7.0.1
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