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evdev: Apply calibration values to absolute events

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Store a set of calibration values per device - these calibration values are
just applied to the absolute motion events.
This commit is contained in:
Rob Bradford 2012-12-03 19:44:16 +00:00 • committed by Jonas Ådahl
parent 24eabf8bb1
commit 60bc3610f3
2 changed files with 19 additions and 0 deletions
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16
src/evdev.c
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@ -229,6 +229,21 @@ is_motion_event(struct input_event *e)
return 0;
}
static void
transform_absolute(struct evdev_device *device)
{
if (!device->abs.apply_calibration)
return;
device->abs.x = device->abs.x * device->abs.calibration[0] +
device->abs.y * device->abs.calibration[1] +
device->abs.calibration[2];
device->abs.y = device->abs.x * device->abs.calibration[3] +
device->abs.y * device->abs.calibration[4] +
device->abs.calibration[5];
}
static void
evdev_flush_motion(struct evdev_device *device, uint32_t time)
{
@ -269,6 +284,7 @@ evdev_flush_motion(struct evdev_device *device, uint32_t time)
device->pending_events &= ~EVDEV_ABSOLUTE_MT_UP;
}
if (device->pending_events & EVDEV_ABSOLUTE_MOTION) {
transform_absolute(device);
notify_motion(master, time,
wl_fixed_from_int(device->abs.x),
wl_fixed_from_int(device->abs.y));

3
src/evdev.h
View file

@ -56,6 +56,9 @@ struct evdev_device {
struct {
int min_x, max_x, min_y, max_y;
int32_t x, y;
int apply_calibration;
float calibration[6];
} abs;
struct {