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udev: input_id - use ABS_MT_SLOT{-1} to exclude non touch screen devices

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Peek at the ABS_MT_SLOT-1 axis. Expect that touch screens only
have axes inside the MT range.
This commit is contained in:
Andreas Pokorny 2015-06-01 22:43:39 +02:00 committed by Peter Hutterer
parent fa5a113d11
commit 495968cf4e
1 changed files with 4 additions and 0 deletions
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4
src/udev/udev-builtin-input_id.c
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@ -171,6 +171,10 @@ static bool test_pointers(struct udev_device *dev,
has_mouse_button = test_bit(BTN_LEFT, bitmask_key);
has_rel_coordinates = test_bit(EV_REL, bitmask_ev) && test_bit(REL_X, bitmask_rel) && test_bit(REL_Y, bitmask_rel);
has_mt_coordinates = test_bit(ABS_MT_POSITION_X, bitmask_abs) && test_bit(ABS_MT_POSITION_Y, bitmask_abs);
/* unset has_mt_coordinates if devices claims to have all abs axis */
if(has_mt_coordinates && test_bit(ABS_MT_SLOT, bitmask_abs) && test_bit(ABS_MT_SLOT - 1, bitmask_abs))
has_mt_coordinates = false;
is_direct = test_bit(INPUT_PROP_DIRECT, bitmask_props);
has_touch = test_bit(BTN_TOUCH, bitmask_key);
/* joysticks don't necessarily have buttons; e. g.