goto err_mem;
}
- /* Mark slots as 'unused' */
+ /* Mark slots as 'inactive' */
for (i = 0; i < num_slots; i++)
input_mt_set_value(&mt->slots[i], ABS_MT_TRACKING_ID, -1);
+ /* Mark slots as 'unused' */
+ mt->frame = 1;
+
dev->mt = mt;
return 0;
err_mem:
int *slots, int num_pos)
{
struct input_mt_slot *s;
- int *w = mt->red, *p;
+ int *w = mt->red, j;
- for (p = slots; p != slots + num_pos; p++)
- *p = -1;
+ for (j = 0; j != num_pos; j++)
+ slots[j] = -1;
for (s = mt->slots; s != mt->slots + mt->num_slots; s++) {
if (!input_mt_is_active(s))
continue;
- for (p = slots; p != slots + num_pos; p++)
- if (*w++ < 0)
- *p = s - mt->slots;
+
+ for (j = 0; j != num_pos; j++) {
+ if (w[j] < 0) {
+ slots[j] = s - mt->slots;
+ break;
+ }
+ }
+
+ w += num_pos;
}
for (s = mt->slots; s != mt->slots + mt->num_slots; s++) {
if (input_mt_is_active(s))
continue;
- for (p = slots; p != slots + num_pos; p++)
- if (*p < 0) {
- *p = s - mt->slots;
+
+ for (j = 0; j != num_pos; j++) {
+ if (slots[j] < 0) {
+ slots[j] = s - mt->slots;
break;
}
+ }
}
}
* set the key on the first unused slot and return.
*
* If no available slot can be found, -1 is returned.
+ * Note that for this function to work properly, input_mt_sync_frame() has
+ * to be called at each frame.
*/
int input_mt_get_slot_by_key(struct input_dev *dev, int key)
{
return s - mt->slots;
for (s = mt->slots; s != mt->slots + mt->num_slots; s++)
- if (!input_mt_is_active(s)) {
+ if (!input_mt_is_active(s) && !input_mt_is_used(mt, s)) {
s->key = key;
return s - mt->slots;
}