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annotate src/game.c @ 44:c97fe725fdeb

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core: implement basic states, closes #2457 @1h
author David Demelier <markand@malikania.fr>
date Wed, 15 Jan 2020 21:31:17 +0100
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children e10fd1b6323f
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44
c97fe725fdeb core: implement basic states, closes #2457 @1h
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1 /*
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2 * game.c -- main game object
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3 *
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4 * Copyright (c) 2020 David Demelier <markand@malikania.fr>
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5 *
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6 * Permission to use, copy, modify, and/or distribute this software for any
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7 * purpose with or without fee is hereby granted, provided that the above
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8 * copyright notice and this permission notice appear in all copies.
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9 *
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10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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17 */
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18
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19 #include <stddef.h>
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20
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21 #include "game.h"
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22 #include "state.h"
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23
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24 struct game game = {
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25 .state = NULL,
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26 .state_next = NULL
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27 };
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28
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29 void
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30 game_handle(const union event *event)
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31 {
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32 if (game.state)
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33 game.state->handle(event);
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34 }
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35
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36 void
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37 game_update(unsigned int ticks)
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38 {
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39 /* Change state if any. */
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40 if (game.state_next) {
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41 /* Inform the current state we're gonna leave it. */
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42 if (game.state)
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43 game.state->leave();
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44
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45 game.state = game.state_next;
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46 game.state->enter();
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47 }
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48
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49 if (game.state)
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50 game.state->update(ticks);
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51 }
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52
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53 void
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54 game_draw(void)
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55 {
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56 if (game.state)
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57 game.state->draw();
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58 }