Scale touch event radius

ui/events/x/events_x.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/events/event_constants.h"
 
 #include <cmath>
 #include <string.h>
 #include <X11/extensions/XInput.h>
 #include <X11/extensions/XInput2.h>
@@ skipping 268 matching lines @@
 }
 
 double GetTouchParamFromXEvent(XEvent* xev,
                               ui::DeviceDataManagerX11::DataType val,
                               double default_value) {
   ui::DeviceDataManagerX11::GetInstance()->GetEventData(
       *xev, val, &default_value);
   return default_value;
 }
 
+void ScaleTouchRadius(XEvent* xev, double* radius) {
+  if (xev->type != GenericEvent)
+    return;
+  XIDeviceEvent* xiev = static_cast<XIDeviceEvent*>(xev->xcookie.data);
+  ui::DeviceDataManagerX11::GetInstance()->ApplyTouchRadiusScale(
+      xiev->sourceid, radius);
+}
+
 }  // namespace
 
 namespace ui {
 
 void UpdateDeviceList() {
   XDisplay* display = gfx::GetXDisplay();
   DeviceListCacheX::GetInstance()->UpdateDeviceList(display);
   TouchFactory::GetInstance()->UpdateDeviceList(display);
   DeviceDataManagerX11::GetInstance()->UpdateDeviceList(display);
 }
@@ skipping 398 matching lines @@
       *xev, ui::DeviceDataManagerX11::DT_TOUCH_TRACKING_ID, &tracking_id)) {
     LOG(ERROR) << "Could not get the tracking ID for the event. Using 0.";
   } else {
     ui::TouchFactory* factory = ui::TouchFactory::GetInstance();
     slot = factory->GetSlotForTrackingID(tracking_id);
   }
   return slot;
 }
 
 float GetTouchRadiusX(const base::NativeEvent& native_event) {
-  return GetTouchParamFromXEvent(native_event,
+  double radius = GetTouchParamFromXEvent(native_event,
       ui::DeviceDataManagerX11::DT_TOUCH_MAJOR, 0.0) / 2.0;
+  ScaleTouchRadius(native_event, &radius);
+  return radius;
 }
 
 float GetTouchRadiusY(const base::NativeEvent& native_event) {
-  return GetTouchParamFromXEvent(native_event,
+  double radius = GetTouchParamFromXEvent(native_event,
       ui::DeviceDataManagerX11::DT_TOUCH_MINOR, 0.0) / 2.0;
+  ScaleTouchRadius(native_event, &radius);
+  return radius;
 }
 
 float GetTouchAngle(const base::NativeEvent& native_event) {
   return GetTouchParamFromXEvent(native_event,
       ui::DeviceDataManagerX11::DT_TOUCH_ORIENTATION, 0.0) / 2.0;
 }
 
 float GetTouchForce(const base::NativeEvent& native_event) {
   double force = 0.0;
   force = GetTouchParamFromXEvent(native_event,
@@ skipping 78 matching lines @@
     start_time = &start_time_;
   if (!end_time)
     end_time = &end_time_;
 
   DeviceDataManagerX11::GetInstance()->GetGestureTimes(
       native_event, start_time, end_time);
   return true;
 }
 
 }  // namespace ui