/* FasTC
 * Copyright (c) 2013 University of North Carolina at Chapel Hill.
 * All rights reserved.
 *
 * Permission to use, copy, modify, and distribute this software and its
 * documentation for educational, research, and non-profit purposes, without
 * fee, and without a written agreement is hereby granted, provided that the
 * above copyright notice, this paragraph, and the following four paragraphs
 * appear in all copies.
 *
 * Permission to incorporate this software into commercial products may be
 * obtained by contacting the authors or the Office of Technology Development
 * at the University of North Carolina at Chapel Hill <otd@unc.edu>.
 *
 * This software program and documentation are copyrighted by the University of
 * North Carolina at Chapel Hill. The software program and documentation are
 * supplied "as is," without any accompanying services from the University of
 * North Carolina at Chapel Hill or the authors. The University of North
 * Carolina at Chapel Hill and the authors do not warrant that the operation of
 * the program will be uninterrupted or error-free. The end-user understands
 * that the program was developed for research purposes and is advised not to
 * rely exclusively on the program for any reason.
 *
 * IN NO EVENT SHALL THE UNIVERSITY OF NORTH CAROLINA AT CHAPEL HILL OR THE
 * AUTHORS BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL,
 * OR CONSEQUENTIAL DAMAGES, INCLUDING LOST PROFITS, ARISING OUT OF THE USE OF
 * THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF NORTH CAROLINA
 * AT CHAPEL HILL OR THE AUTHORS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 *
 * THE UNIVERSITY OF NORTH CAROLINA AT CHAPEL HILL AND THE AUTHORS SPECIFICALLY
 * DISCLAIM ANY WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE AND ANY 
 * STATUTORY WARRANTY OF NON-INFRINGEMENT. THE SOFTWARE PROVIDED HEREUNDER IS ON
 * AN "AS IS" BASIS, AND THE UNIVERSITY  OF NORTH CAROLINA AT CHAPEL HILL AND
 * THE AUTHORS HAVE NO OBLIGATIONS TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, 
 * ENHANCEMENTS, OR MODIFICATIONS.
 *
 * Please send all BUG REPORTS to <pavel@cs.unc.edu>.
 *
 * The authors may be contacted via:
 *
 * Pavel Krajcevski
 * Dept of Computer Science
 * 201 S Columbia St
 * Frederick P. Brooks, Jr. Computer Science Bldg
 * Chapel Hill, NC 27599-3175
 * USA
 * 
 * <http://gamma.cs.unc.edu/FasTC/>
 */

#ifndef BASE_INCLUDE_COLOR_H_
#define BASE_INCLUDE_COLOR_H_

#include "TexCompTypes.h"
#include "Vector4.h"

namespace FasTC {

class Color : public Vec4f {
 public:
  Color(float r, float g, float b, float a) : Vec4f(a, r, g, b) { }
  Color() : Vec4f(0, 0, 0, 0) { }

  // Let's allow us to use the operators...
  template<typename T>
  Color &operator=(const Vector4<T> &other) {
    Vec4f::operator=(other);
    return *this;
  }

  template<typename T>
  Color(const Vector4<T> &other) : Vec4f(other) { }
  
  const float &A() const { return vec[0]; }
  float &A() { return vec[0]; }
  const float &R() const { return vec[1]; }
  float &R() { return vec[1]; }
  const float &G() const { return vec[2]; }
  float &G() { return vec[2]; }
  const float &B() const { return vec[3]; }
  float &B() { return vec[3]; }
  const float &Component(uint32 idx) const { return vec[idx]; }
  float &Component(uint32 idx) { return vec[idx]; }

  // Take all of the components, transform them to their 8-bit variants,
  // and then pack each channel into an R8G8B8A8 32-bit integer. We assume
  // that the architecture is little-endian, so the alpha channel will end
  // up in the most-significant byte.
  uint32 Pack() const;
  void Unpack(uint32 rgba);

  // Tests for equality by comparing the values and the bit depths.
  bool operator==(const Color &) const;
};
REGISTER_VECTOR_TYPE(Color);

}  // namespace FasTC

#endif  // BASE_INCLUDE_COLOR_H_
