[PATCH libinput 1/4] evdev: keep the absinfo struct around instead of min/max

[Peter Hutterer]

We'll need that later for conversion to mm.

Signed-off-by: Peter Hutterer <peter.hutterer at who-t.net>
---
 src/evdev-mt-touchpad-buttons.c | 20 +++++++++++++-------
 src/evdev-mt-touchpad.c         |  6 ++++--
 src/evdev.c                     | 25 +++++++++++++------------
 src/evdev.h                     |  2 +-
 4 files changed, 31 insertions(+), 22 deletions(-)

diff --git a/src/evdev-mt-touchpad-buttons.c b/src/evdev-mt-touchpad-buttons.c
index ce48ed0..45d5d70 100644
--- a/src/evdev-mt-touchpad-buttons.c
+++ b/src/evdev-mt-touchpad-buttons.c
@@ -565,6 +565,7 @@ tp_init_buttons(struct tp_dispatch *tp,
 	struct tp_touch *t;
 	int width, height;
 	double diagonal;
+	const struct input_absinfo *absinfo_x, *absinfo_y;
 
 	tp->buttons.is_clickpad = libevdev_has_property(device->evdev,
 							INPUT_PROP_BUTTONPAD);
@@ -580,8 +581,11 @@ tp_init_buttons(struct tp_dispatch *tp,
 			log_bug_kernel("non clickpad without right button?\n");
 	}
 
-	width = abs(device->abs.max_x - device->abs.min_x);
-	height = abs(device->abs.max_y - device->abs.min_y);
+	absinfo_x = device->abs.absinfo_x;
+	absinfo_y = device->abs.absinfo_y;
+
+	width = abs(absinfo_x->maximum - absinfo_x->minimum);
+	height = abs(absinfo_y->maximum - absinfo_y->minimum);
 	diagonal = sqrt(width*width + height*height);
 
 	tp->buttons.motion_dist = diagonal * DEFAULT_BUTTON_MOTION_THRESHOLD;
@@ -590,13 +594,15 @@ tp_init_buttons(struct tp_dispatch *tp,
 		tp->buttons.use_clickfinger = true;
 
 	if (tp->buttons.is_clickpad && !tp->buttons.use_clickfinger) {
-		tp->buttons.bottom_area.top_edge = height * .8 + device->abs.min_y;
-		tp->buttons.bottom_area.rightbutton_left_edge = width/2 + device->abs.min_x;
+		int xoffset = absinfo_x->minimum,
+		    yoffset = absinfo_y->minimum;
+		tp->buttons.bottom_area.top_edge = height * .8 + yoffset;
+		tp->buttons.bottom_area.rightbutton_left_edge = width/2 + xoffset;
 
 		if (tp->buttons.has_topbuttons) {
-			tp->buttons.top_area.bottom_edge = height * .08 + device->abs.min_y;
-			tp->buttons.top_area.rightbutton_left_edge = width * .58 + device->abs.min_x;
-			tp->buttons.top_area.leftbutton_right_edge = width * .42 + device->abs.min_x;
+			tp->buttons.top_area.bottom_edge = height * .08 + yoffset;
+			tp->buttons.top_area.rightbutton_left_edge = width * .58 + xoffset;
+			tp->buttons.top_area.leftbutton_right_edge = width * .42 + xoffset;
 		} else {
 			tp->buttons.top_area.bottom_edge = INT_MIN;
 		}
diff --git a/src/evdev-mt-touchpad.c b/src/evdev-mt-touchpad.c
index 92e0651..787afa4 100644
--- a/src/evdev-mt-touchpad.c
+++ b/src/evdev-mt-touchpad.c
@@ -750,8 +750,10 @@ tp_init(struct tp_dispatch *tp,
 	if (tp_init_slots(tp, device) != 0)
 		return -1;
 
-	width = abs(device->abs.max_x - device->abs.min_x);
-	height = abs(device->abs.max_y - device->abs.min_y);
+	width = abs(device->abs.absinfo_x->maximum -
+		    device->abs.absinfo_x->minimum);
+	height = abs(device->abs.absinfo_y->maximum -
+		     device->abs.absinfo_y->minimum);
 	diagonal = sqrt(width*width + height*height);
 
 	tp->hysteresis.margin_x =
diff --git a/src/evdev.c b/src/evdev.c
index 51ad5e3..907d18e 100644
--- a/src/evdev.c
+++ b/src/evdev.c
@@ -89,13 +89,19 @@ transform_absolute(struct evdev_device *device, int32_t *x, int32_t *y)
 	}
 }
 
+static inline double
+scale_axis(const struct input_absinfo *absinfo, double val, double to_range)
+{
+	return (val - absinfo->minimum) * to_range /
+		(absinfo->maximum - absinfo->minimum + 1);
+}
+
 double
 evdev_device_transform_x(struct evdev_device *device,
 			 double x,
 			 uint32_t width)
 {
-	return (x - device->abs.min_x) * width /
-		(device->abs.max_x - device->abs.min_x + 1);
+	return scale_axis(device->abs.absinfo_x, x, width);
 }
 
 double
@@ -103,8 +109,7 @@ evdev_device_transform_y(struct evdev_device *device,
 			 double y,
 			 uint32_t height)
 {
-	return (y - device->abs.min_y) * height /
-		(device->abs.max_y - device->abs.min_y + 1);
+	return scale_axis(device->abs.absinfo_y, y, height);
 }
 
 static void
@@ -606,13 +611,11 @@ evdev_configure_device(struct evdev_device *device)
 	if (libevdev_has_event_type(evdev, EV_ABS)) {
 
 		if ((absinfo = libevdev_get_abs_info(evdev, ABS_X))) {
-			device->abs.min_x = absinfo->minimum;
-			device->abs.max_x = absinfo->maximum;
+			device->abs.absinfo_x = absinfo;
 			has_abs = 1;
 		}
 		if ((absinfo = libevdev_get_abs_info(evdev, ABS_Y))) {
-			device->abs.min_y = absinfo->minimum;
-			device->abs.max_y = absinfo->maximum;
+			device->abs.absinfo_y = absinfo;
 			has_abs = 1;
 		}
                 /* We only handle the slotted Protocol B in weston.
@@ -621,11 +624,9 @@ evdev_configure_device(struct evdev_device *device)
 		if (libevdev_has_event_code(evdev, EV_ABS, ABS_MT_POSITION_X) &&
 		    libevdev_has_event_code(evdev, EV_ABS, ABS_MT_POSITION_Y)) {
 			absinfo = libevdev_get_abs_info(evdev, ABS_MT_POSITION_X);
-			device->abs.min_x = absinfo->minimum;
-			device->abs.max_x = absinfo->maximum;
+			device->abs.absinfo_x = absinfo;
 			absinfo = libevdev_get_abs_info(evdev, ABS_MT_POSITION_Y);
-			device->abs.min_y = absinfo->minimum;
-			device->abs.max_y = absinfo->maximum;
+			device->abs.absinfo_y = absinfo;
 			device->is_mt = 1;
 			has_touch = 1;
 			has_mt = 1;
diff --git a/src/evdev.h b/src/evdev.h
index d057010..03b6742 100644
--- a/src/evdev.h
+++ b/src/evdev.h
@@ -66,7 +66,7 @@ struct evdev_device {
 	const char *devname;
 	int fd;
 	struct {
-		int min_x, max_x, min_y, max_y;
+		const struct input_absinfo *absinfo_x, *absinfo_y;
 		int32_t x, y;
 
 		int32_t seat_slot;
-- 
1.9.3