/******************************************************************/
/* This file is part of the homework assignments for CSCI-427/527 */
/* at The College of William & Mary and authored by Pieter Peers. */
/* No part of this file, whether altered or in original form, can */
/* be distributed or used outside the context of CSCI-427/527     */
/* without consent of either the College of William & Mary or     */
/* Pieter Peers.                                                  */
/******************************************************************/
#ifndef _TEXTURE_BASE_H_
#define _TEXTURE_BASE_H_

#include "vec2d.h"
#include "image.h"

class texture_base : public image {
 public:
  //////////////////
  // Constructors //
  //////////////////
  texture_base(bool repeat=true);
  texture_base(const texture_base& src);

  ///////////////
  // Operators //
  ///////////////
  texture_base& operator=(const texture_base& src);

  virtual image::value_type operator()(const vec2d& textureCoord) const = 0;

  ////////////////
  // Inspectors //
  ////////////////
  bool repeatEdge(void) const { return _repeat; }
  bool wrapEdge(void) const { return !_repeat; }

  /////////////
  // Friends //
  /////////////
  friend void swap(texture_base& a, texture_base& b) { a._swap(b); }

  friend std::ostream& operator<<(std::ostream& s, const texture_base& t)
  {
    t._print(s);
    return s;
  }

 protected:
  ///////////////////////
  // Protected Methods //
  ///////////////////////
  virtual void _assign(const texture_base& src);
  color& _at(signed int x, signed int y);
  const color& _at(signed int x, signed int y) const;

 private:
  /////////////////////
  // Private Methods //
  /////////////////////
  virtual void _print(std::ostream& s) const=0;

  //////////////////
  // Data Members //
  //////////////////
  bool _repeat;
};

#endif /* _TEXTURE_BASE_H_ */