[macOS, Windows, X11] Add graphic tablet pen pressure and tilt support to InputEventMouseMotion event.

2 files changed, 74 insertions, 4 deletions

diff --git a/platform/x11/os_x11.cpp b/platform/x11/os_x11.cpp
index 694aea7462..c695d657e7 100644
--- a/platform/x11/os_x11.cpp
+++ b/platform/x11/os_x11.cpp
@@ -83,6 +83,12 @@
 #define XINPUT_CLIENT_VERSION_MAJOR 2
 #define XINPUT_CLIENT_VERSION_MINOR 2
 
+#define VALUATOR_ABSX 0
+#define VALUATOR_ABSY 1
+#define VALUATOR_PRESSURE 2
+#define VALUATOR_TILTX 3
+#define VALUATOR_TILTY 4
+
 static const double abs_resolution_mult = 10000.0;
 static const double abs_resolution_range_mult = 10.0;
 
@@ -665,6 +671,15 @@ bool OS_X11::refresh_device_info() {
 		int range_min_y = 0;
 		int range_max_x = 0;
 		int range_max_y = 0;
+		int pressure_resolution = 0;
+		int pressure_min = 0;
+		int pressure_max = 0;
+		int tilt_resolution_x = 0;
+		int tilt_resolution_y = 0;
+		int tilt_range_min_x = 0;
+		int tilt_range_min_y = 0;
+		int tilt_range_max_x = 0;
+		int tilt_range_max_y = 0;
 		for (int j = 0; j < dev->num_classes; j++) {
 #ifdef TOUCH_ENABLED
 			if (dev->classes[j]->type == XITouchClass && ((XITouchClassInfo *)dev->classes[j])->mode == XIDirectTouch) {
@@ -674,16 +689,28 @@ bool OS_X11::refresh_device_info() {
 			if (dev->classes[j]->type == XIValuatorClass) {
 				XIValuatorClassInfo *class_info = (XIValuatorClassInfo *)dev->classes[j];
 
-				if (class_info->number == 0 && class_info->mode == XIModeAbsolute) {
+				if (class_info->number == VALUATOR_ABSX && class_info->mode == XIModeAbsolute) {
 					resolution_x = class_info->resolution;
 					range_min_x = class_info->min;
 					range_max_x = class_info->max;
 					absolute_mode = true;
-				} else if (class_info->number == 1 && class_info->mode == XIModeAbsolute) {
+				} else if (class_info->number == VALUATOR_ABSY && class_info->mode == XIModeAbsolute) {
 					resolution_y = class_info->resolution;
 					range_min_y = class_info->min;
 					range_max_y = class_info->max;
 					absolute_mode = true;
+				} else if (class_info->number == VALUATOR_PRESSURE && class_info->mode == XIModeAbsolute) {
+					pressure_resolution = class_info->resolution;
+					pressure_min = class_info->min;
+					pressure_max = class_info->max;
+				} else if (class_info->number == VALUATOR_TILTX && class_info->mode == XIModeAbsolute) {
+					tilt_resolution_x = class_info->resolution;
+					tilt_range_min_x = class_info->min;
+					tilt_range_max_x = class_info->max;
+				} else if (class_info->number == VALUATOR_TILTY && class_info->mode == XIModeAbsolute) {
+					tilt_resolution_y = class_info->resolution;
+					tilt_range_min_y = class_info->min;
+					tilt_range_max_y = class_info->max;
 				}
 			}
 		}
@@ -703,6 +730,18 @@ bool OS_X11::refresh_device_info() {
 			xi.absolute_devices[dev->deviceid] = Vector2(abs_resolution_mult / resolution_x, abs_resolution_mult / resolution_y);
 			print_verbose("XInput: Absolute pointing device: " + String(dev->name));
 		}
+
+		if (pressure_resolution <= 0) {
+			pressure_resolution = (pressure_max - pressure_min);
+		}
+		if (tilt_resolution_x <= 0) {
+			tilt_resolution_x = (tilt_range_max_x - tilt_range_min_x);
+		}
+		if (tilt_resolution_y <= 0) {
+			tilt_resolution_y = (tilt_range_max_y - tilt_range_min_y);
+		}
+		xi.pressure = 0;
+		xi.pen_devices[dev->deviceid] = Vector3(pressure_resolution, tilt_resolution_x, tilt_resolution_y);
 	}
 
 	XIFreeDeviceInfo(info);
@@ -2095,14 +2134,39 @@ void OS_X11::process_xevents() {
 
 						double rel_x = 0.0;
 						double rel_y = 0.0;
+						double pressure = 0.0;
+						double tilt_x = 0.0;
+						double tilt_y = 0.0;
 
-						if (XIMaskIsSet(raw_event->valuators.mask, 0)) {
+						if (XIMaskIsSet(raw_event->valuators.mask, VALUATOR_ABSX)) {
 							rel_x = *values;
 							values++;
 						}
 
-						if (XIMaskIsSet(raw_event->valuators.mask, 1)) {
+						if (XIMaskIsSet(raw_event->valuators.mask, VALUATOR_ABSY)) {
 							rel_y = *values;
+							values++;
+						}
+
+						if (XIMaskIsSet(raw_event->valuators.mask, VALUATOR_PRESSURE)) {
+							pressure = *values;
+							values++;
+						}
+
+						if (XIMaskIsSet(raw_event->valuators.mask, VALUATOR_TILTX)) {
+							tilt_x = *values;
+							values++;
+						}
+
+						if (XIMaskIsSet(raw_event->valuators.mask, VALUATOR_TILTY)) {
+							tilt_y = *values;
+						}
+
+						Map<int, Vector3>::Element *pen_info = xi.pen_devices.find(device_id);
+						if (pen_info) {
+							Vector3 mult = pen_info->value();
+							if (mult.x != 0.0) xi.pressure = pressure / mult.x;
+							if ((mult.y != 0.0) && (mult.z != 0.0)) xi.tilt = Vector2(tilt_x / mult.y, tilt_y / mult.z);
 						}
 
 						// https://bugs.freedesktop.org/show_bug.cgi?id=71609
@@ -2417,6 +2481,9 @@ void OS_X11::process_xevents() {
 				Ref<InputEventMouseMotion> mm;
 				mm.instance();
 
+				mm->set_pressure(xi.pressure);
+				mm->set_tilt(xi.tilt);
+
 				// Make the absolute position integral so it doesn't look _too_ weird :)
 				Point2i posi(pos);
 
diff --git a/platform/x11/os_x11.h b/platform/x11/os_x11.h
index e6c2effacf..a5576f4402 100644
--- a/platform/x11/os_x11.h
+++ b/platform/x11/os_x11.h
@@ -131,9 +131,12 @@ class OS_X11 : public OS_Unix {
 		int opcode;
 		Vector<int> touch_devices;
 		Map<int, Vector2> absolute_devices;
+		Map<int, Vector3> pen_devices;
 		XIEventMask all_event_mask;
 		XIEventMask all_master_event_mask;
 		Map<int, Vector2> state;
+		double pressure;
+		Vector2 tilt;
 		Vector2 mouse_pos_to_filter;
 		Vector2 relative_motion;
 		Vector2 raw_pos;