change numeric type in Viewport to uint32_t

public:

  Viewport(

      int width,

      int height) :

      Viewport(width, height, std::tuple<int, int, int, int>(0,0,0,0)) {}

      uint32_t width,

      uint32_t height) :

      Viewport(width, height, std::tuple<uint32_t, uint32_t, uint32_t, uint32_t>(0,0,0,0)) {}

  Viewport(

      int width,

      int height,

      const std::tuple<int, int, int, int>& padding) :

      uint32_t width,

      uint32_t height,

      const std::tuple<uint32_t, uint32_t, uint32_t, uint32_t>& padding) :

      width_(width),

      height_(height),

      padding_(padding) {}

  int innerWidth() const {

  uint32_t innerWidth() const {

    return width_ - paddingRight() - paddingLeft();

  }

  int innerHeight() const {

  uint32_t innerHeight() const {

    return height_ - paddingTop() - paddingBottom();

  }

  int paddingTop() const {

  uint32_t paddingTop() const {

    return std::get<0>(padding_);

  }

  int paddingRight() const {

  uint32_t paddingRight() const {

    return std::get<1>(padding_);

  }

  int paddingBottom() const {

  uint32_t paddingBottom() const {

    return std::get<2>(padding_);

  }

  int paddingLeft() const {

  uint32_t paddingLeft() const {

    return std::get<3>(padding_);

  }

  const std::tuple<int, int, int, int>& padding() {

  const std::tuple<uint32_t, uint32_t, uint32_t, uint32_t>& padding() {

    return padding_;

  }

  void setPadding(const std::tuple<int, int, int, int>& padding) {

  void setPadding(const std::tuple<uint32_t, uint32_t, uint32_t, uint32_t>& padding) {

    padding_ = padding;

  }

  void setPaddingTop(int val) {

  void setPaddingTop(uint32_t val) {

    std::get<0>(padding_) = val;

  }

  void setPaddingRight(int val) {

  void setPaddingRight(uint32_t val) {

    std::get<1>(padding_) = val;

  }

  void setPaddingBottom(int val) {

  void setPaddingBottom(uint32_t val) {

    std::get<2>(padding_) = val;

  }

  void setPaddingLeft(int val) {

  void setPaddingLeft(uint32_t val) {

    std::get<3>(padding_) = val;

  }

  int width_;

  int height_;

  std::tuple<int, int, int, int> padding_;

  uint32_t width_;

  uint32_t height_;

  std::tuple<uint32_t, uint32_t, uint32_t, uint32_t> padding_;

};

}