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Commit d8386938 authored by Prabir Pradhan's avatar Prabir Pradhan
Browse files

Disable mouse acceleration and scaling when Pointer Capture is enabled 

Pointer Capture is usually used by games. Disabling pointer acceleration
and speed scaling for mice when the feature is enabled would allow
games/libraries  to handle mouse events directly from the device, giving
them more flexibility to tune the behavior.

This makes Pointer Capture more similar between mice and touchpads,
since they both now report the same values that the raw input device
reports. This should give the most flexibility for apps to handle the
API at a low-level.

Bug: 225853027
Test: atest inputflinger_tests
Change-Id: I5eba5257ec3b47b0772a6a6435a64f5102c2c4b7
parent c5218503

services/inputflinger/reader/mapper/CursorInputMapper.cpp

+18 −6
Original line number Diff line number Diff line
@@ -27,6 +27,9 @@ 


namespace android {



// The default velocity control parameters that has no effect.

static const VelocityControlParameters FLAT_VELOCITY_CONTROL_PARAMS{};



// --- CursorMotionAccumulator ---



CursorMotionAccumulator::CursorMotionAccumulator() {
@@ -154,8 +157,9 @@ void CursorInputMapper::configure(nsecs_t when, const InputReaderConfiguration* 
        mHWheelScale = 1.0f;

    }



    if ((!changes && config->pointerCaptureRequest.enable) ||

        (changes & InputReaderConfiguration::CHANGE_POINTER_CAPTURE)) {

    const bool configurePointerCapture = (!changes && config->pointerCaptureRequest.enable) ||

            (changes & InputReaderConfiguration::CHANGE_POINTER_CAPTURE);

    if (configurePointerCapture) {

        if (config->pointerCaptureRequest.enable) {

            if (mParameters.mode == Parameters::MODE_POINTER) {

                mParameters.mode = Parameters::MODE_POINTER_RELATIVE;
@@ -180,11 +184,19 @@ void CursorInputMapper::configure(nsecs_t when, const InputReaderConfiguration* 
        }

    }



    if (!changes || (changes & InputReaderConfiguration::CHANGE_POINTER_SPEED)) {

    if (!changes || (changes & InputReaderConfiguration::CHANGE_POINTER_SPEED) ||

        configurePointerCapture) {

        if (config->pointerCaptureRequest.enable) {

            // Disable any acceleration or scaling when Pointer Capture is enabled.

            mPointerVelocityControl.setParameters(FLAT_VELOCITY_CONTROL_PARAMS);

            mWheelXVelocityControl.setParameters(FLAT_VELOCITY_CONTROL_PARAMS);

            mWheelYVelocityControl.setParameters(FLAT_VELOCITY_CONTROL_PARAMS);

        } else {

            mPointerVelocityControl.setParameters(config->pointerVelocityControlParameters);

            mWheelXVelocityControl.setParameters(config->wheelVelocityControlParameters);

            mWheelYVelocityControl.setParameters(config->wheelVelocityControlParameters);

        }

    }



    if (!changes || (changes & InputReaderConfiguration::CHANGE_DISPLAY_INFO)) {

        mOrientation = DISPLAY_ORIENTATION_0;

services/inputflinger/tests/InputReader_test.cpp

+57 −1
Original line number Diff line number Diff line
@@ -375,6 +375,11 @@ public: 


    float getPointerGestureMovementSpeedRatio() { return mConfig.pointerGestureMovementSpeedRatio; }



    void setVelocityControlParams(const VelocityControlParameters& params) {

        mConfig.pointerVelocityControlParameters = params;

        mConfig.wheelVelocityControlParameters = params;

    }



private:

    uint32_t mNextPointerCaptureSequenceNumber = 0;
@@ -2949,7 +2954,10 @@ protected: 
    }



    void configureDevice(uint32_t changes) {

        if (!changes || (changes & InputReaderConfiguration::CHANGE_DISPLAY_INFO)) {

        if (!changes ||

            (changes &

             (InputReaderConfiguration::CHANGE_DISPLAY_INFO |

              InputReaderConfiguration::CHANGE_POINTER_CAPTURE))) {

            mReader->requestRefreshConfiguration(changes);

            mReader->loopOnce();

        }
@@ -4842,6 +4850,54 @@ TEST_F(CursorInputMapperTest, Process_PointerCapture) { 
    ASSERT_NO_FATAL_FAILURE(assertPosition(*mFakePointerController, 110.0f, 220.0f));

}



/**

 * When Pointer Capture is enabled, we expect to report unprocessed relative movements, so any

 * pointer acceleration or speed processing should not be applied.

 */

TEST_F(CursorInputMapperTest, PointerCaptureDisablesVelocityProcessing) {

    addConfigurationProperty("cursor.mode", "pointer");

    const VelocityControlParameters testParams(5.f /*scale*/, 0.f /*low threshold*/,

                                               100.f /*high threshold*/, 10.f /*acceleration*/);

    mFakePolicy->setVelocityControlParams(testParams);

    CursorInputMapper& mapper = addMapperAndConfigure<CursorInputMapper>();



    NotifyDeviceResetArgs resetArgs;

    ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyDeviceResetWasCalled(&resetArgs));

    ASSERT_EQ(ARBITRARY_TIME, resetArgs.eventTime);

    ASSERT_EQ(DEVICE_ID, resetArgs.deviceId);



    NotifyMotionArgs args;



    // Move and verify scale is applied.

    process(mapper, ARBITRARY_TIME, READ_TIME, EV_REL, REL_X, 10);

    process(mapper, ARBITRARY_TIME, READ_TIME, EV_REL, REL_Y, 20);

    process(mapper, ARBITRARY_TIME, READ_TIME, EV_SYN, SYN_REPORT, 0);

    ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasCalled(&args));

    ASSERT_EQ(AINPUT_SOURCE_MOUSE, args.source);

    ASSERT_EQ(AMOTION_EVENT_ACTION_HOVER_MOVE, args.action);

    const float relX = args.pointerCoords[0].getAxisValue(AMOTION_EVENT_AXIS_RELATIVE_X);

    const float relY = args.pointerCoords[0].getAxisValue(AMOTION_EVENT_AXIS_RELATIVE_Y);

    ASSERT_GT(relX, 10);

    ASSERT_GT(relY, 20);



    // Enable Pointer Capture

    mFakePolicy->setPointerCapture(true);

    configureDevice(InputReaderConfiguration::CHANGE_POINTER_CAPTURE);

    NotifyPointerCaptureChangedArgs captureArgs;

    ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyCaptureWasCalled(&captureArgs));

    ASSERT_TRUE(captureArgs.request.enable);



    // Move and verify scale is not applied.

    process(mapper, ARBITRARY_TIME, READ_TIME, EV_REL, REL_X, 10);

    process(mapper, ARBITRARY_TIME, READ_TIME, EV_REL, REL_Y, 20);

    process(mapper, ARBITRARY_TIME, READ_TIME, EV_SYN, SYN_REPORT, 0);

    ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasCalled(&args));

    ASSERT_EQ(AINPUT_SOURCE_MOUSE_RELATIVE, args.source);

    ASSERT_EQ(AMOTION_EVENT_ACTION_MOVE, args.action);

    ASSERT_EQ(10, args.pointerCoords[0].getX());

    ASSERT_EQ(20, args.pointerCoords[0].getY());

}



TEST_F(CursorInputMapperTest, Process_ShouldHandleDisplayId) {

    CursorInputMapper& mapper = addMapperAndConfigure<CursorInputMapper>();