bool LayerBase::setMatrix(const layer_state_t::matrix22_t& matrix) {
    mCurrentState.sequence++;
    mCurrentState.transform.set(
            matrix.dsdx, matrix.dsdy, matrix.dtdx, matrix.dtdy);
    requestTransaction();
    return true;
}

bool LayerBase::setLayerStack(uint32_t layerStack) {
    if (mCurrentState.layerStack == layerStack)
        return false;
    mCurrentState.sequence++;
    mCurrentState.layerStack = layerStack;
    requestTransaction();
    return true;
}

void LayerBase::forceVisibilityTransaction() {
    // this can be called without SurfaceFlinger.mStateLock, but if we
    // can atomically increment the sequence number, it doesn't matter.
    android_atomic_inc(&mCurrentState.sequence);
    requestTransaction();
}