vpRGBa.cpp

/*
 * ViSP, open source Visual Servoing Platform software.
 * Copyright (C) 2005 - 2024 by Inria. All rights reserved.
 *
 * This software is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * See the file LICENSE.txt at the root directory of this source
 * distribution for additional information about the GNU GPL.
 *
 * For using ViSP with software that can not be combined with the GNU
 * GPL, please contact Inria about acquiring a ViSP Professional
 * Edition License.
 *
 * See https://visp.inria.fr for more information.
 *
 * This software was developed at:
 * Inria Rennes - Bretagne Atlantique
 * Campus Universitaire de Beaulieu
 * 35042 Rennes Cedex
 * France
 *
 * If you have questions regarding the use of this file, please contact
 * Inria at visp@inria.fr
 *
 * This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
 * WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 * Description:
 * RGBA pixel.
 */

 
#include <visp3/core/vpColor.h>
#include <visp3/core/vpException.h>
#include <visp3/core/vpRGBa.h>
#include <visp3/core/vpHSV.h>
 
 
BEGIN_VISP_NAMESPACE

vpRGBa &vpRGBa::operator=(const unsigned char &v)
{
  this->R = v;
  this->G = v;
  this->B = v;
  this->A = v;
  return *this;
}

vpRGBa &vpRGBa::operator=(const unsigned int &v)
{
  assert(v < 256);
  this->R = v;
  this->G = v;
  this->B = v;
  this->A = v;
  return *this;
}

vpRGBa &vpRGBa::operator=(const int &v)
{
  assert(v < 256);
  this->R = v;
  this->G = v;
  this->B = v;
  this->A = v;
  return *this;
}

vpRGBa &vpRGBa::operator=(const vpColVector &v)
{
  const unsigned int val_4 = 4;
  if (v.getRows() != val_4) {
    throw(vpException(vpException::dimensionError, "Bad vector dimension "));
  }
  const unsigned int index_0 = 0;
  const unsigned int index_1 = 1;
  const unsigned int index_2 = 2;
  const unsigned int index_3 = 3;
  R = static_cast<unsigned char>(v[index_0]);
  G = static_cast<unsigned char>(v[index_1]);
  B = static_cast<unsigned char>(v[index_2]);
  A = static_cast<unsigned char>(v[index_3]);
  return *this;
}

bool vpRGBa::operator==(const vpRGBa &v) const
{
  return (R == v.R) && (G == v.G) && (B == v.B) && (A == v.A);
}

bool vpRGBa::operator!=(const vpRGBa &v) const { return ((R != v.R) || (G != v.G) || (B != v.B) || (A != v.A)); }

vpColVector vpRGBa::operator-(const vpRGBa &v) const
{
  vpColVector n(4); // new color
  const unsigned int index_0 = 0;
  const unsigned int index_1 = 1;
  const unsigned int index_2 = 2;
  const unsigned int index_3 = 3;
  n[index_0] = static_cast<double>(R) - static_cast<double>(v.R);
  n[index_1] = static_cast<double>(G) - static_cast<double>(v.G);
  n[index_2] = static_cast<double>(B) - static_cast<double>(v.B);
  n[index_3] = static_cast<double>(A) - static_cast<double>(v.A);
  return n;
}

vpRGBa vpRGBa::operator+(const vpRGBa &v) const
{
  vpRGBa n; // new color
  n.R = static_cast<unsigned char>(R + v.R);
  n.G = static_cast<unsigned char>(G + v.G);
  n.B = static_cast<unsigned char>(B + v.B);
  n.A = static_cast<unsigned char>(A + v.A);
  return n;
}

vpColVector vpRGBa::operator-(const vpColVector &v) const
{
  vpColVector n(4); // new color
  const unsigned int index_0 = 0;
  const unsigned int index_1 = 1;
  const unsigned int index_2 = 2;
  const unsigned int index_3 = 3;
  n[index_0] = R - v[index_0];
  n[index_1] = G - v[index_1];
  n[index_2] = B - v[index_2];
  n[index_3] = A - v[index_3];
  return n;
}

vpColVector vpRGBa::operator+(const vpColVector &v) const
{
  vpColVector n(4); // new color
  const unsigned int index_0 = 0;
  const unsigned int index_1 = 1;
  const unsigned int index_2 = 2;
  const unsigned int index_3 = 3;
  n[index_0] = R + v[index_0];
  n[index_1] = G + v[index_1];
  n[index_2] = B + v[index_2];
  n[index_3] = A + v[index_3];
  return n;
}

vpColVector vpRGBa::operator*(const float &v) const
{
  vpColVector n(4);
  const unsigned int index_0 = 0;
  const unsigned int index_1 = 1;
  const unsigned int index_2 = 2;
  const unsigned int index_3 = 3;
  n[index_0] = R * v;
  n[index_1] = G * v;
  n[index_2] = B * v;
  n[index_3] = A * v;
  return n;
}

vpColVector vpRGBa::operator*(const double &v) const
{
  vpColVector n(4);
  const unsigned int index_0 = 0;
  const unsigned int index_1 = 1;
  const unsigned int index_2 = 2;
  const unsigned int index_3 = 3;
  n[index_0] = R * v;
  n[index_1] = G * v;
  n[index_2] = B * v;
  n[index_3] = A * v;
  return n;
}
 
bool vpRGBa::operator<(const vpRGBa &v) const
{
  double gray1 = (0.2126 * R) + (0.7152 * G) + (0.0722 * B);
  double gray2 = (0.2126 * v.R) + (0.7152 * v.G) + (0.0722 * v.B);
 
  return (gray1 < gray2);
}
 
bool vpRGBa::operator>(const vpRGBa &v) const
{
  double gray1 = (0.2126 * R) + (0.7152 * G) + (0.0722 * B);
  double gray2 = (0.2126 * v.R) + (0.7152 * v.G) + (0.0722 * v.B);
 
  return (gray1 > gray2);
}

vpRGBa operator*(const double &x, const  vpRGBa &rgb)
{
  vpRGBa rgba;
  rgba.R = static_cast<unsigned char>(rgb.R * x);
  rgba.G = static_cast<unsigned char>(rgb.G * x);
  rgba.B = static_cast<unsigned char>(rgb.B * x);
  rgba.A = rgb.A;
  return rgba;
}

VISP_EXPORT std::ostream &operator<<(std::ostream &os, const vpRGBa &rgba)
{
  os << "(" << static_cast<int>(rgba.R) << "," << static_cast<int>(rgba.G) << "," << static_cast<int>(rgba.B) << "," << static_cast<int>(rgba.A) << ")";
  return os;
}
END_VISP_NAMESPACE