/*
 * libtcod 1.6.0
 * Copyright (c) 2008,2009,2010,2012,2013 Jice & Mingos
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * The name of Jice or Mingos may not be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY JICE AND MINGOS ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL JICE OR MINGOS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
 #ifndef _TCOD_BRESENHAM_H
 #define _TCOD_BRESENHAM_H
 
 typedef bool (*TCOD_line_listener_t) (int x, int y);
 
 TCODLIB_API void TCOD_line_init(int xFrom, int yFrom, int xTo, int yTo);
 TCODLIB_API bool TCOD_line_step(int *xCur, int *yCur); /* advance one step. returns true if we reach destination */
 /* atomic callback function. Stops when the callback returns false */
 TCODLIB_API bool TCOD_line(int xFrom, int yFrom, int xTo, int yTo, TCOD_line_listener_t listener);
 
 /* thread-safe versions */
 typedef struct {
 	int stepx;
 	int stepy;
 	int e;
 	int deltax;
 	int deltay;
 	int origx; 
 	int origy; 
 	int destx; 
 	int desty; 
 } TCOD_bresenham_data_t;
 
 TCODLIB_API void TCOD_line_init_mt(int xFrom, int yFrom, int xTo, int yTo, TCOD_bresenham_data_t *data);
 TCODLIB_API bool TCOD_line_step_mt(int *xCur, int *yCur, TCOD_bresenham_data_t *data);
 TCODLIB_API bool TCOD_line_mt(int xFrom, int yFrom, int xTo, int yTo, TCOD_line_listener_t listener, TCOD_bresenham_data_t *data);
 
 #endif