Add relative-x/y axis for mouse devices.

Used by Ie21e521f3e5c581f976dc0feb5d84bfa48b046cd.

Bug: 5452473
Change-Id: I4189eb4d93f50c2865b7a325727be5ceebcc71f8

3 files changed, 46 insertions, 10 deletions

diff --git a/include/android/input.h b/include/android/input.h
index 5eeb7fc89c..fd9fa98e70 100644
--- a/include/android/input.h
+++ b/include/android/input.h
@@ -651,6 +651,21 @@ enum {
      */
     AMOTION_EVENT_AXIS_SCROLL = 26,
     /**
+     * Axis constant: The movement of x position of a motion event.
+     *
+     * - For a mouse, reports a difference of x position between the previous position.
+     * This is useful when pointer is captured, in that case the mouse pointer doesn't
+     * change the location but this axis reports the difference which allows the app
+     * to see how the mouse is moved.
+     */
+    AMOTION_EVENT_AXIS_RELATIVE_X = 27,
+    /**
+     * Axis constant: The movement of y position of a motion event.
+     *
+     * Same as {@link RELATIVE_X}, but for y position.
+     */
+    AMOTION_EVENT_AXIS_RELATIVE_Y = 28,
+    /**
      * Axis constant: Generic 1 axis of a motion event.
      * The interpretation of a generic axis is device-specific.
      */
diff --git a/services/inputflinger/InputDispatcher.cpp b/services/inputflinger/InputDispatcher.cpp
index 0fba1bf3e4..04919f723f 100644
--- a/services/inputflinger/InputDispatcher.cpp
+++ b/services/inputflinger/InputDispatcher.cpp
@@ -902,7 +902,7 @@ void InputDispatcher::logOutboundMotionDetailsLocked(const char* prefix, const M
         ALOGD("  Pointer %d: id=%d, toolType=%d, "
                 "x=%f, y=%f, pressure=%f, size=%f, "
                 "touchMajor=%f, touchMinor=%f, toolMajor=%f, toolMinor=%f, "
-                "orientation=%f",
+                "orientation=%f, relativeX=%f, relativeY=%f",
                 i, entry->pointerProperties[i].id,
                 entry->pointerProperties[i].toolType,
                 entry->pointerCoords[i].getAxisValue(AMOTION_EVENT_AXIS_X),
@@ -913,7 +913,9 @@ void InputDispatcher::logOutboundMotionDetailsLocked(const char* prefix, const M
                 entry->pointerCoords[i].getAxisValue(AMOTION_EVENT_AXIS_TOUCH_MINOR),
                 entry->pointerCoords[i].getAxisValue(AMOTION_EVENT_AXIS_TOOL_MAJOR),
                 entry->pointerCoords[i].getAxisValue(AMOTION_EVENT_AXIS_TOOL_MINOR),
-                entry->pointerCoords[i].getAxisValue(AMOTION_EVENT_AXIS_ORIENTATION));
+                entry->pointerCoords[i].getAxisValue(AMOTION_EVENT_AXIS_ORIENTATION),
+                entry->pointerCoords[i].getAxisValue(AMOTION_EVENT_AXIS_RELATIVE_X),
+                entry->pointerCoords[i].getAxisValue(AMOTION_EVENT_AXIS_RELATIVE_Y));
     }
 #endif
 }
diff --git a/services/inputflinger/InputReader.cpp b/services/inputflinger/InputReader.cpp
index 2aee8ad863..e9914ec21f 100644
--- a/services/inputflinger/InputReader.cpp
+++ b/services/inputflinger/InputReader.cpp
@@ -2614,6 +2614,8 @@ void CursorInputMapper::sync(nsecs_t when) {
         mPointerController->getPosition(&x, &y);
         pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_X, x);
         pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_Y, y);
+        pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_RELATIVE_X, deltaX);
+        pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_RELATIVE_Y, deltaY);
         displayId = ADISPLAY_ID_DEFAULT;
     } else {
         pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_X, deltaX);
@@ -5333,13 +5335,14 @@ bool TouchInputMapper::preparePointerGestures(nsecs_t when,
             }
         }
 
+        float deltaX = 0, deltaY = 0;
         if (activeTouchId >= 0 && mLastCookedState.fingerIdBits.hasBit(activeTouchId)) {
             const RawPointerData::Pointer& currentPointer =
                     mCurrentRawState.rawPointerData.pointerForId(activeTouchId);
             const RawPointerData::Pointer& lastPointer =
                     mLastRawState.rawPointerData.pointerForId(activeTouchId);
-            float deltaX = (currentPointer.x - lastPointer.x) * mPointerXMovementScale;
-            float deltaY = (currentPointer.y - lastPointer.y) * mPointerYMovementScale;
+            deltaX = (currentPointer.x - lastPointer.x) * mPointerXMovementScale;
+            deltaY = (currentPointer.y - lastPointer.y) * mPointerYMovementScale;
 
             rotateDelta(mSurfaceOrientation, &deltaX, &deltaY);
             mPointerVelocityControl.move(when, &deltaX, &deltaY);
@@ -5366,6 +5369,8 @@ bool TouchInputMapper::preparePointerGestures(nsecs_t when,
         mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_X, x);
         mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_Y, y);
         mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_PRESSURE, 1.0f);
+        mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_RELATIVE_X, deltaX);
+        mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_RELATIVE_Y, deltaY);
     } else if (currentFingerCount == 0) {
         // Case 3. No fingers down and button is not pressed. (NEUTRAL)
         if (mPointerGesture.lastGestureMode != PointerGesture::NEUTRAL) {
@@ -5473,15 +5478,14 @@ bool TouchInputMapper::preparePointerGestures(nsecs_t when,
             mPointerGesture.currentGestureMode = PointerGesture::TAP_DRAG;
         }
 
+        float deltaX = 0, deltaY = 0;
         if (mLastCookedState.fingerIdBits.hasBit(activeTouchId)) {
             const RawPointerData::Pointer& currentPointer =
                     mCurrentRawState.rawPointerData.pointerForId(activeTouchId);
             const RawPointerData::Pointer& lastPointer =
                     mLastRawState.rawPointerData.pointerForId(activeTouchId);
-            float deltaX = (currentPointer.x - lastPointer.x)
-                    * mPointerXMovementScale;
-            float deltaY = (currentPointer.y - lastPointer.y)
-                    * mPointerYMovementScale;
+            deltaX = (currentPointer.x - lastPointer.x) * mPointerXMovementScale;
+            deltaY = (currentPointer.y - lastPointer.y) * mPointerYMovementScale;
 
             rotateDelta(mSurfaceOrientation, &deltaX, &deltaY);
             mPointerVelocityControl.move(when, &deltaX, &deltaY);
@@ -5525,6 +5529,10 @@ bool TouchInputMapper::preparePointerGestures(nsecs_t when,
         mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_Y, y);
         mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_PRESSURE,
                 down ? 1.0f : 0.0f);
+        mPointerGesture.currentGestureCoords[0].setAxisValue(
+                AMOTION_EVENT_AXIS_RELATIVE_X, deltaX);
+        mPointerGesture.currentGestureCoords[0].setAxisValue(
+                AMOTION_EVENT_AXIS_RELATIVE_Y, deltaY);
 
         if (lastFingerCount == 0 && currentFingerCount != 0) {
             mPointerGesture.resetTap();
@@ -5771,6 +5779,10 @@ bool TouchInputMapper::preparePointerGestures(nsecs_t when,
                     mPointerGesture.referenceGestureX);
             mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_Y,
                     mPointerGesture.referenceGestureY);
+            mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_RELATIVE_X,
+                    commonDeltaX);
+            mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_RELATIVE_Y,
+                    commonDeltaY);
             mPointerGesture.currentGestureCoords[0].setAxisValue(AMOTION_EVENT_AXIS_PRESSURE, 1.0f);
         } else if (mPointerGesture.currentGestureMode == PointerGesture::FREEFORM) {
             // FREEFORM mode.
@@ -5867,6 +5879,10 @@ bool TouchInputMapper::preparePointerGestures(nsecs_t when,
                         AMOTION_EVENT_AXIS_Y, mPointerGesture.referenceGestureY + deltaY);
                 mPointerGesture.currentGestureCoords[i].setAxisValue(
                         AMOTION_EVENT_AXIS_PRESSURE, 1.0f);
+                mPointerGesture.currentGestureCoords[i].setAxisValue(
+                        AMOTION_EVENT_AXIS_RELATIVE_X, deltaX);
+                mPointerGesture.currentGestureCoords[i].setAxisValue(
+                        AMOTION_EVENT_AXIS_RELATIVE_Y, deltaY);
             }
 
             if (mPointerGesture.activeGestureId < 0) {
@@ -5960,12 +5976,13 @@ void TouchInputMapper::dispatchPointerMouse(nsecs_t when, uint32_t policyFlags)
     if (!mCurrentCookedState.mouseIdBits.isEmpty()) {
         uint32_t id = mCurrentCookedState.mouseIdBits.firstMarkedBit();
         uint32_t currentIndex = mCurrentRawState.rawPointerData.idToIndex[id];
+        float deltaX = 0, deltaY = 0;
         if (mLastCookedState.mouseIdBits.hasBit(id)) {
             uint32_t lastIndex = mCurrentRawState.rawPointerData.idToIndex[id];
-            float deltaX = (mCurrentRawState.rawPointerData.pointers[currentIndex].x
+            deltaX = (mCurrentRawState.rawPointerData.pointers[currentIndex].x
                     - mLastRawState.rawPointerData.pointers[lastIndex].x)
                     * mPointerXMovementScale;
-            float deltaY = (mCurrentRawState.rawPointerData.pointers[currentIndex].y
+            deltaY = (mCurrentRawState.rawPointerData.pointers[currentIndex].y
                     - mLastRawState.rawPointerData.pointers[lastIndex].y)
                     * mPointerYMovementScale;
 
@@ -5988,6 +6005,8 @@ void TouchInputMapper::dispatchPointerMouse(nsecs_t when, uint32_t policyFlags)
         mPointerSimple.currentCoords.setAxisValue(AMOTION_EVENT_AXIS_Y, y);
         mPointerSimple.currentCoords.setAxisValue(AMOTION_EVENT_AXIS_PRESSURE,
                 hovering ? 0.0f : 1.0f);
+        mPointerSimple.currentCoords.setAxisValue(AMOTION_EVENT_AXIS_RELATIVE_X, x);
+        mPointerSimple.currentCoords.setAxisValue(AMOTION_EVENT_AXIS_RELATIVE_Y, y);
         mPointerSimple.currentProperties.id = 0;
         mPointerSimple.currentProperties.toolType =
                 mCurrentCookedState.cookedPointerData.pointerProperties[currentIndex].toolType;