Add enough information to compatibility-transform getRaw()
Many apps are mis-using getRaw (assuming it means screen-coordinates).
This means, for now, we have to do a compatibility transform on the
API to prevent breaking said apps.
Fortunately, since the input window transform includes rotation,
the only extra information we need to calculate this compat-raw
is the display size.
This CL topic pipes the display size around so that it makes into the
MotionEvent and can be used to calculate getRaw()
Bug: 179274888
Test: atest inputflinger_tests:InputDispatcherTest
Change-Id: Iff893643312e8ec9f38eeb96d76a41fdb3a28350
diff --git a/libs/input/Input.cpp b/libs/input/Input.cpp
index 5600eb3..deb4679 100644
--- a/libs/input/Input.cpp
+++ b/libs/input/Input.cpp
@@ -340,7 +340,8 @@
int32_t flags, int32_t edgeFlags, int32_t metaState,
int32_t buttonState, MotionClassification classification,
const ui::Transform& transform, float xPrecision, float yPrecision,
- float rawXCursorPosition, float rawYCursorPosition, nsecs_t downTime,
+ float rawXCursorPosition, float rawYCursorPosition,
+ int32_t displayWidth, int32_t displayHeight, nsecs_t downTime,
nsecs_t eventTime, size_t pointerCount,
const PointerProperties* pointerProperties,
const PointerCoords* pointerCoords) {
@@ -357,6 +358,8 @@
mYPrecision = yPrecision;
mRawXCursorPosition = rawXCursorPosition;
mRawYCursorPosition = rawYCursorPosition;
+ mDisplayWidth = displayWidth;
+ mDisplayHeight = displayHeight;
mDownTime = downTime;
mPointerProperties.clear();
mPointerProperties.appendArray(pointerProperties, pointerCount);
@@ -380,6 +383,8 @@
mYPrecision = other->mYPrecision;
mRawXCursorPosition = other->mRawXCursorPosition;
mRawYCursorPosition = other->mRawYCursorPosition;
+ mDisplayWidth = other->mDisplayWidth;
+ mDisplayHeight = other->mDisplayHeight;
mDownTime = other->mDownTime;
mPointerProperties = other->mPointerProperties;
@@ -426,7 +431,7 @@
}
float MotionEvent::getRawAxisValue(int32_t axis, size_t pointerIndex) const {
- return getRawPointerCoords(pointerIndex)->getAxisValue(axis);
+ return getHistoricalRawAxisValue(axis, pointerIndex, getHistorySize());
}
float MotionEvent::getAxisValue(int32_t axis, size_t pointerIndex) const {
@@ -440,7 +445,32 @@
float MotionEvent::getHistoricalRawAxisValue(int32_t axis, size_t pointerIndex,
size_t historicalIndex) const {
- return getHistoricalRawPointerCoords(pointerIndex, historicalIndex)->getAxisValue(axis);
+ if (axis != AMOTION_EVENT_AXIS_X && axis != AMOTION_EVENT_AXIS_Y) {
+ return getHistoricalRawPointerCoords(pointerIndex, historicalIndex)->getAxisValue(axis);
+ }
+ // 0x7 encapsulates all 3 rotations (see ui::Transform::RotationFlags)
+ static const int ALL_ROTATIONS_MASK = 0x7;
+ uint32_t orientation = (mTransform.getOrientation() & ALL_ROTATIONS_MASK);
+ if (orientation == ui::Transform::ROT_0) {
+ return getHistoricalRawPointerCoords(pointerIndex, historicalIndex)->getAxisValue(axis);
+ }
+
+ // For compatibility, convert raw coordinates into "oriented screen space". Once app developers
+ // are educated about getRaw, we can consider removing this.
+ vec2 xy = getHistoricalRawPointerCoords(pointerIndex, historicalIndex)->getXYValue();
+ const float unrotatedX = xy.x;
+ if (orientation == ui::Transform::ROT_90) {
+ xy.x = mDisplayHeight - xy.y;
+ xy.y = unrotatedX;
+ } else if (orientation == ui::Transform::ROT_180) {
+ xy.x = mDisplayWidth - xy.x;
+ xy.y = mDisplayHeight - xy.y;
+ } else if (orientation == ui::Transform::ROT_270) {
+ xy.x = xy.y;
+ xy.y = mDisplayWidth - unrotatedX;
+ }
+ static_assert(AMOTION_EVENT_AXIS_X == 0 && AMOTION_EVENT_AXIS_Y == 1);
+ return xy[axis];
}
float MotionEvent::getHistoricalAxisValue(int32_t axis, size_t pointerIndex,
@@ -449,19 +479,10 @@
return getHistoricalRawPointerCoords(pointerIndex, historicalIndex)->getAxisValue(axis);
}
- float rawX = getHistoricalRawPointerCoords(pointerIndex, historicalIndex)->getX();
- float rawY = getHistoricalRawPointerCoords(pointerIndex, historicalIndex)->getY();
- vec2 vals = mTransform.transform(rawX, rawY);
-
- switch (axis) {
- case AMOTION_EVENT_AXIS_X:
- return vals.x;
- case AMOTION_EVENT_AXIS_Y:
- return vals.y;
- }
-
- // This should never happen
- return 0;
+ vec2 vals = mTransform.transform(
+ getHistoricalRawPointerCoords(pointerIndex, historicalIndex)->getXYValue());
+ static_assert(AMOTION_EVENT_AXIS_X == 0 && AMOTION_EVENT_AXIS_Y == 1);
+ return vals[axis];
}
ssize_t MotionEvent::findPointerIndex(int32_t pointerId) const {
@@ -606,6 +627,8 @@
mYPrecision = parcel->readFloat();
mRawXCursorPosition = parcel->readFloat();
mRawYCursorPosition = parcel->readFloat();
+ mDisplayWidth = parcel->readInt32();
+ mDisplayHeight = parcel->readInt32();
mDownTime = parcel->readInt64();
mPointerProperties.clear();
@@ -665,6 +688,8 @@
parcel->writeFloat(mYPrecision);
parcel->writeFloat(mRawXCursorPosition);
parcel->writeFloat(mRawYCursorPosition);
+ parcel->writeInt32(mDisplayWidth);
+ parcel->writeInt32(mDisplayHeight);
parcel->writeInt64(mDownTime);
for (size_t i = 0; i < pointerCount; i++) {