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Add half-axis support for triggers

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This commit is contained in:
Cameron Gutman
2021-07-25 16:47:06 -05:00
parent e2c2575efb
commit 35af4c4ede
3 changed files with 42 additions and 17 deletions
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37
src/input/evdev.c
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@@ -166,18 +166,28 @@ static short evdev_convert_value(struct input_event *ev, struct input_device *de
return (long long)(ev->value - (ev->value>parms->avg?parms->flat*2:0) - parms->min) * (SHRT_MAX-SHRT_MIN) / (parms->max-parms->min-parms->flat*2) + SHRT_MIN;
}
static char evdev_convert_value_byte(struct input_event *ev, struct input_device *dev, struct input_abs_parms *parms) {
static char evdev_convert_value_byte(struct input_event *ev, struct input_device *dev, struct input_abs_parms *parms, char halfaxis) {
if (parms->max == 0 && parms->min == 0) {
fprintf(stderr, "Axis not found: %d\n", ev->code);
return 0;
}
if (abs(ev->value-parms->min)<parms->flat)
return 0;
else if (ev->value>parms->max)
return UCHAR_MAX;
else
return (ev->value - parms->flat - parms->min) * UCHAR_MAX / (parms->diff - parms->flat);
if (halfaxis == 0) {
if (abs(ev->value-parms->min)<parms->flat)
return 0;
else if (ev->value>parms->max)
return UCHAR_MAX;
else
return (ev->value - parms->flat - parms->min) * UCHAR_MAX / (parms->diff - parms->flat);
} else {
short val = evdev_convert_value(ev, dev, parms, false);
if (halfaxis == '-' && val < 0)
return -(int)val * UCHAR_MAX / (SHRT_MAX-SHRT_MIN);
else if (halfaxis == '+' && val > 0)
return (int)val * UCHAR_MAX / (SHRT_MAX-SHRT_MIN);
else
return 0;
}
}
static bool evdev_handle_event(struct input_event *ev, struct input_device *dev) {
@@ -437,12 +447,17 @@ static bool evdev_handle_event(struct input_event *ev, struct input_device *dev)
dev->rightStickX = evdev_convert_value(ev, dev, &dev->rxParms, dev->map->reverse_rightx);
else if (index == dev->map->abs_righty)
dev->rightStickY = evdev_convert_value(ev, dev, &dev->ryParms, !dev->map->reverse_righty);
else if (index == dev->map->abs_lefttrigger)
dev->leftTrigger = evdev_convert_value_byte(ev, dev, &dev->zParms);
else if (index == dev->map->abs_righttrigger)
dev->rightTrigger = evdev_convert_value_byte(ev, dev, &dev->rzParms);
else
gamepadModified = false;
if (index == dev->map->abs_lefttrigger) {
dev->leftTrigger = evdev_convert_value_byte(ev, dev, &dev->zParms, dev->map->halfaxis_lefttrigger);
gamepadModified = true;
}
if (index == dev->map->abs_righttrigger) {
dev->rightTrigger = evdev_convert_value_byte(ev, dev, &dev->rzParms, dev->map->halfaxis_righttrigger);
gamepadModified = true;
}
}
}