C++ BitSet32::hasBit方法代码示例

void VelocityTracker::clearPointers(BitSet32 idBits) {
    BitSet32 remainingIdBits(mCurrentPointerIdBits.value & ~idBits.value);
    mCurrentPointerIdBits = remainingIdBits;

    if (mActivePointerId >= 0 && idBits.hasBit(mActivePointerId)) {
        mActivePointerId = !remainingIdBits.isEmpty() ? remainingIdBits.firstMarkedBit() : -1;
    }

    mStrategy->clearPointers(idBits);
}

void PointerController::setSpots(const PointerCoords* spotCoords,
                                 const uint32_t* spotIdToIndex, BitSet32 spotIdBits) {
#if DEBUG_POINTER_UPDATES
    ALOGD("setSpots: idBits=%08x", spotIdBits.value);
    for (BitSet32 idBits(spotIdBits); !idBits.isEmpty(); ) {
        uint32_t id = idBits.firstMarkedBit();
        idBits.clearBit(id);
        const PointerCoords& c = spotCoords[spotIdToIndex[id]];
        ALOGD(" spot %d: position=(%0.3f, %0.3f), pressure=%0.3f", id,
              c.getAxisValue(AMOTION_EVENT_AXIS_X),
              c.getAxisValue(AMOTION_EVENT_AXIS_Y),
              c.getAxisValue(AMOTION_EVENT_AXIS_PRESSURE));
    }
#endif

    AutoMutex _l(mLock);

    mSpriteController->openTransaction();

    // Add or move spots for fingers that are down.
    for (BitSet32 idBits(spotIdBits); !idBits.isEmpty(); ) {
        uint32_t id = idBits.clearFirstMarkedBit();
        const PointerCoords& c = spotCoords[spotIdToIndex[id]];
        const SpriteIcon& icon = c.getAxisValue(AMOTION_EVENT_AXIS_PRESSURE) > 0
                                 ? mResources.spotTouch : mResources.spotHover;
        float x = c.getAxisValue(AMOTION_EVENT_AXIS_X);
        float y = c.getAxisValue(AMOTION_EVENT_AXIS_Y);

        Spot* spot = getSpotLocked(id);
        if (!spot) {
            spot = createAndAddSpotLocked(id);
        }

        spot->updateSprite(&icon, x, y);
    }

    // Remove spots for fingers that went up.
    for (size_t i = 0; i < mLocked.spots.size(); i++) {
        Spot* spot = mLocked.spots.itemAt(i);
        if (spot->id != Spot::INVALID_ID
                && !spotIdBits.hasBit(spot->id)) {
            fadeOutAndReleaseSpotLocked(spot);
        }
    }

    mSpriteController->closeTransaction();
}

void VelocityTracker::addMovement(nsecs_t eventTime, BitSet32 idBits, const Position* positions) {
    while (idBits.count() > MAX_POINTERS) {
        idBits.clearLastMarkedBit();
    }

    if ((mCurrentPointerIdBits.value & idBits.value)
            && eventTime >= mLastEventTime + ASSUME_POINTER_STOPPED_TIME) {
#if DEBUG_VELOCITY
        ALOGD("VelocityTracker: stopped for %0.3f ms, clearing state.",
                (eventTime - mLastEventTime) * 0.000001f);
#endif
        // We have not received any movements for too long.  Assume that all pointers
        // have stopped.
        mStrategy->clear();
    }
    mLastEventTime = eventTime;

    mCurrentPointerIdBits = idBits;
    if (mActivePointerId < 0 || !idBits.hasBit(mActivePointerId)) {
        mActivePointerId = idBits.isEmpty() ? -1 : idBits.firstMarkedBit();
    }

    mStrategy->addMovement(eventTime, idBits, positions);

#if DEBUG_VELOCITY
    ALOGD("VelocityTracker: addMovement eventTime=%" PRId64 ", idBits=0x%08x, activePointerId=%d",
            eventTime, idBits.value, mActivePointerId);
    for (BitSet32 iterBits(idBits); !iterBits.isEmpty(); ) {
        uint32_t id = iterBits.firstMarkedBit();
        uint32_t index = idBits.getIndexOfBit(id);
        iterBits.clearBit(id);
        Estimator estimator;
        getEstimator(id, &estimator);
        ALOGD("  %d: position (%0.3f, %0.3f), "
                "estimator (degree=%d, xCoeff=%s, yCoeff=%s, confidence=%f)",
                id, positions[index].x, positions[index].y,
                int(estimator.degree),
                vectorToString(estimator.xCoeff, estimator.degree + 1).c_str(),
                vectorToString(estimator.yCoeff, estimator.degree + 1).c_str(),
                estimator.confidence);
    }
#endif
}

TEST_F(BitSet32Test, BitWiseAnd_NonDisjoint) {
    b1.markBit(2);
    b1.markBit(4);
    b1.markBit(6);
    b2.markBit(3);
    b2.markBit(6);
    b2.markBit(9);

    BitSet32 tmp = b1 & b2;
    EXPECT_EQ(tmp.count(), 1u);
    EXPECT_TRUE(tmp.hasBit(6));
    // Check that the operator is symmetric
    EXPECT_TRUE((b2 & b1) == (b1 & b2));

    b1 &= b2;
    EXPECT_EQ(b1.count(), 1u);
    EXPECT_EQ(b2.count(), 3u);
    EXPECT_TRUE(b2.hasBit(3) && b2.hasBit(6) && b2.hasBit(9));
}

void VelocityTrackerState::getVelocity(int32_t id, float* outVx, float* outVy) {
    if (id == ACTIVE_POINTER_ID) {
        id = mVelocityTracker.getActivePointerId();
    }

    float vx, vy;
    if (id >= 0 && id <= MAX_POINTER_ID && mCalculatedIdBits.hasBit(id)) {
        uint32_t index = mCalculatedIdBits.getIndexOfBit(id);
        const Velocity& velocity = mCalculatedVelocity[index];
        vx = velocity.vx;
        vy = velocity.vy;
    } else {
        vx = 0;
        vy = 0;
    }

    if (outVx) {
        *outVx = vx;
    }
    if (outVy) {
        *outVy = vy;
    }
}