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touchpad: force a resolution onto the apple touchpads

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A large range of the Apple touchpads seem to have the same dimensions. Use
that fact to force-set a resolution.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Peter Hutterer 2015-03-16 14:13:43 +10:00
parent 70f8ae5678
commit d101d43dd0
1 changed files with 16 additions and 0 deletions
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16
src/evdev-mt-touchpad.c
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@ -966,6 +966,22 @@ tp_init_accel(struct tp_dispatch *tp, double diagonal)
res_x = tp->device->abs.absinfo_x->resolution;
res_y = tp->device->abs.absinfo_y->resolution;
/* Mac touchpads seem to all be the same size (except the most
* recent ones)
* http://www.moshi.com/trackpad-protector-trackguard-macbook-pro#silver
*/
if (tp->model == MODEL_UNIBODY_MACBOOK && tp->device->abs.fake_resolution) {
const struct input_absinfo *abs;
int width, height;
abs = tp->device->abs.absinfo_x;
width = abs->maximum - abs->minimum;
abs = tp->device->abs.absinfo_y;
height = abs->maximum - abs->minimum;
res_x = width/104.4;
res_y = height/75.4;
}
/*
* Not all touchpads report the same amount of units/mm (resolution).
* Normalize motion events to the default mouse DPI as base