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Initial Commit / Linux Combined Proof of Concept example

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John McCardle 2023-02-23 19:37:13 -05:00
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/* BSD 3-Clause License
*
* Copyright © 2008-2022, Jice and the libtcod contributors.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. 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.
*
* 3. Neither the name of the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 THE COPYRIGHT HOLDER OR CONTRIBUTORS 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
#include "portability.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* \brief A callback to be passed to TCOD_line
*
* The points given to the callback include both the starting and ending
* positions.
*
* \param x
* \param y
* \return As long as this callback returns true it will be called with the
* next x,y point on the line.
*/
typedef bool (*TCOD_line_listener_t)(int x, int y);
TCODLIB_API TCOD_DEPRECATED("This function is not reentrant. Use TCOD_line_init_mt instead.") void TCOD_line_init(
int xFrom, int yFrom, int xTo, int yTo);
/** advance one step. returns true if we reach destination */
TCODLIB_API TCOD_DEPRECATED("This function is not reentrant.") bool TCOD_line_step(
int* __restrict xCur, int* __restrict yCur);
/* 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);
/**
* \brief A struct used for computing a bresenham line.
*/
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* __restrict xCur, int* __restrict yCur, TCOD_bresenham_data_t* __restrict data);
TCOD_DEPRECATED("Use TCOD_line instead.")
TCODLIB_API bool TCOD_line_mt(
int xFrom, int yFrom, int xTo, int yTo, TCOD_line_listener_t listener, TCOD_bresenham_data_t* data);
#ifdef __cplusplus
} // extern "C"
#endif // __cplusplus
#endif // _TCOD_BRESENHAM_H