Initial commit.

1 files changed, 1542 insertions, 0 deletions

diff --git a/src/main.c b/src/main.c
new file mode 100644
index 0000000..48b8fc8
--- /dev/null
+++ b/src/main.c
@@ -0,0 +1,1542 @@
+/*
+ * Copyright (c) 2019-2020, yzrh <yzrh@noema.org>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <fcntl.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <pthread.h>
+#include <unistd.h>
+
+#ifdef __linux__
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <poll.h>
+
+#endif /* __linux__ */
+
+#include <SDL2/SDL.h>
+#include <SDL2/SDL_ttf.h>
+
+#ifdef SOUND
+
+#include <SDL2/SDL_mixer.h>
+
+#endif /* SOUND */
+
+#include "version.h"
+#include "extern.h"
+#include "screen.h"
+
+#ifdef GPIO
+
+#include "gpio.h"
+
+#endif /* GPIO */
+
+static pthread_mutex_t mutex;
+static pthread_cond_t cond;
+
+static SDL_Renderer *renderer;
+static TTF_Font *font_20;
+static TTF_Font *font_24;
+
+/*
+ * Default to keyboard,
+ * GPIO inputs are mapped to controller keys
+ */
+static Snake_Device device = SNAKE_KEYBOARD;
+static int selection = 0;
+
+static Snake_Text text_title;
+static Snake_Text text_help_top;
+static Snake_Text text_help_0;
+static Snake_Text text_help_1;
+static Snake_Text text_help_2;
+static Snake_Text text_help_3;
+static Snake_Text text_help_4;
+static Snake_Text text_help_5;
+static Snake_Text text_help_6;
+static Snake_Text text_help_7;
+
+static Snake_Text text_score;
+
+static Snake_Text text_prompt_start;
+static Snake_Text text_prompt_resume;
+
+static Snake_Text text_prompt_0;
+static Snake_Text text_prompt_1;
+static Snake_Text text_prompt_2;
+
+static bool start = 1;
+static bool end = 0;
+static bool begin = 0;
+
+static bool god = 0;
+static bool reset = 0;
+static bool wait = 0;
+static bool multiplayer = 0;
+static bool flappy = 0;
+
+static struct timespec delay = {
+	.tv_sec = 0,
+	.tv_nsec = TICK_TIME_INIT
+};
+
+static int score;
+static int result;
+static int distance;
+static int speed;
+
+static Snake_Input input = SNAKE_EMPTY;
+static Snake_Input head[2][2];
+
+static Snake_Pos *snake0 = NULL;
+static Snake_Pos *snake1 = NULL;
+
+static int fruit[2];
+
+static Snake_Pos *gap = NULL;
+
+static void*
+handler_rendering(void *args)
+{
+	const SDL_Color fg = {
+		COLOUR_FOREGROUND_R,
+		COLOUR_FOREGROUND_G,
+		COLOUR_FOREGROUND_B
+	};
+	const SDL_Color bg = {
+		COLOUR_BACKGROUND_R,
+		COLOUR_BACKGROUND_G,
+		COLOUR_BACKGROUND_B
+	};
+	const SDL_Color bg_s = {
+		COLOUR_BACKGROUND_SHADE_R,
+		COLOUR_BACKGROUND_SHADE_G,
+		COLOUR_BACKGROUND_SHADE_B
+	};
+
+	char result_str[23];
+	char score_str[11];
+
+	Snake_Text text_result;
+
+	Snake_Text text_welcome;
+	Snake_Text text_clear;
+	Snake_Text text_gameover;
+	Snake_Text text_pause;
+
+	while (!end) {
+		draw_clear(renderer);
+		draw_colour(renderer, SNAKE_FOREGROUND);
+
+		draw_wall(renderer);
+
+		draw_text(renderer,
+			font_20,
+			SCREEN_HEIGHT + 4 * SCREEN_UNIT_X,
+			SCREEN_UNIT_Y,
+			"Snake",
+			1,
+			0,
+			fg,
+			bg,
+			&text_title);
+		draw_text(renderer,
+			font_20,
+			SCREEN_HEIGHT + 4 * SCREEN_UNIT_X,
+			2 * SCREEN_UNIT_Y,
+			"Help",
+			1,
+			0,
+			fg,
+			bg,
+			&text_help_top);
+		if (god)
+			draw_text(renderer,
+				font_20,
+				SCREEN_HEIGHT + SCREEN_UNIT_X / 4,
+				2.5 * SCREEN_UNIT_Y,
+				"0. Don't forget to cheat",
+				0,
+				0,
+				fg,
+				bg,
+				&text_help_0);
+		if (device == SNAKE_KEYBOARD) {
+			draw_text(renderer,
+				font_20,
+				SCREEN_HEIGHT + SCREEN_UNIT_X / 4,
+				3 * SCREEN_UNIT_Y,
+				"1. Classic: use arrow keys to move",
+				0,
+				0,
+				fg,
+				bg,
+				&text_help_1);
+			draw_text(renderer,
+				font_20,
+				SCREEN_HEIGHT + SCREEN_UNIT_X / 4,
+				3.5 * SCREEN_UNIT_Y,
+				"2. Multiplayer: use s, e, d, f keys",
+				0,
+				0,
+				fg,
+				bg,
+				&text_help_2);
+			draw_text(renderer,
+				font_20,
+				SCREEN_HEIGHT + SCREEN_UNIT_X / 4,
+				4 * SCREEN_UNIT_Y,
+				"3. Flappy: SPACE key to jump",
+				0,
+				0,
+				fg,
+				bg,
+				&text_help_3);
+			draw_text(renderer,
+				font_20,
+				SCREEN_HEIGHT + SCREEN_UNIT_X / 4,
+				4.5 * SCREEN_UNIT_Y,
+				"4. ESCAPE key to pause",
+				0,
+				0,
+				fg,
+				bg,
+				&text_help_4);
+			draw_text(renderer,
+				font_20,
+				SCREEN_HEIGHT + SCREEN_UNIT_X / 4,
+				5 * SCREEN_UNIT_Y,
+				"5. r key to reset",
+				0,
+				0,
+				fg,
+				bg,
+				&text_help_5);
+			draw_text(renderer,
+				font_20,
+				SCREEN_HEIGHT + SCREEN_UNIT_X / 4,
+				5.5 * SCREEN_UNIT_Y,
+				"6. m key to toggle music",
+				0,
+				0,
+				fg,
+				bg,
+				&text_help_6);
+		} else if (device == SNAKE_TOUCHSCREEN) {
+			draw_text(renderer,
+				font_20,
+				SCREEN_HEIGHT + SCREEN_UNIT_X / 4,
+				3 * SCREEN_UNIT_Y,
+				"1. Classic: swipe to move",
+				0,
+				0,
+				fg,
+				bg,
+				&text_help_1);
+			draw_text(renderer,
+				font_20,
+				SCREEN_HEIGHT + SCREEN_UNIT_X / 4,
+				3.5 * SCREEN_UNIT_Y,
+				"2. Multiplayer: use different side",
+				0,
+				0,
+				fg,
+				bg,
+				&text_help_2);
+			draw_text(renderer,
+				font_20,
+				SCREEN_HEIGHT + SCREEN_UNIT_X / 4,
+				4 * SCREEN_UNIT_Y,
+				"3. Flappy: tap to jump",
+				0,
+				0,
+				fg,
+				bg,
+				&text_help_3);
+			draw_text(renderer,
+				font_20,
+				SCREEN_HEIGHT + SCREEN_UNIT_X / 4,
+				4.5 * SCREEN_UNIT_Y,
+				"4. Tap here to pause",
+				0,
+				1,
+				fg,
+				bg,
+				&text_help_4);
+			draw_text(renderer,
+				font_20,
+				SCREEN_HEIGHT + SCREEN_UNIT_X / 4,
+				5 * SCREEN_UNIT_Y,
+				"5. Tap here to reset",
+				0,
+				1,
+				fg,
+				bg,
+				&text_help_5);
+			draw_text(renderer,
+				font_20,
+				SCREEN_HEIGHT + SCREEN_UNIT_X / 4,
+				5.5 * SCREEN_UNIT_Y,
+				"6. Tap here to toggle music",
+				0,
+				1,
+				fg,
+				bg,
+				&text_help_6);
+		} else if (device == SNAKE_CONTROLLER) {
+			draw_text(renderer,
+				font_20,
+				SCREEN_HEIGHT + SCREEN_UNIT_X / 4,
+				3 * SCREEN_UNIT_Y,
+				"1. Classic: use D-pad to move",
+				0,
+				0,
+				fg,
+				bg,
+				&text_help_1);
+			draw_text(renderer,
+				font_20,
+				SCREEN_HEIGHT + SCREEN_UNIT_X / 4,
+				3.5 * SCREEN_UNIT_Y,
+				"2. Multiplayer: second controller",
+				0,
+				0,
+				fg,
+				bg,
+				&text_help_2);
+			draw_text(renderer,
+				font_20,
+				SCREEN_HEIGHT + SCREEN_UNIT_X / 4,
+				4 * SCREEN_UNIT_Y,
+				"3. Flappy: Press A to jump",
+				0,
+				0,
+				fg,
+				bg,
+				&text_help_3);
+			draw_text(renderer,
+				font_20,
+				SCREEN_HEIGHT + SCREEN_UNIT_X / 4,
+				4.5 * SCREEN_UNIT_Y,
+				"4. Press BACK to pause",
+				0,
+				0,
+				fg,
+				bg,
+				&text_help_4);
+			draw_text(renderer,
+				font_20,
+				SCREEN_HEIGHT + SCREEN_UNIT_X / 4,
+				5 * SCREEN_UNIT_Y,
+				"5. Press X to reset",
+				0,
+				0,
+				fg,
+				bg,
+				&text_help_5);
+			draw_text(renderer,
+				font_20,
+				SCREEN_HEIGHT + SCREEN_UNIT_X / 4,
+				5.5 * SCREEN_UNIT_Y,
+				"6. Press Y to toggle music",
+				0,
+				0,
+				fg,
+				bg,
+				&text_help_6);
+		}
+		draw_text(renderer,
+			font_20,
+			SCREEN_HEIGHT + SCREEN_UNIT_X / 4,
+			6 * SCREEN_UNIT_Y,
+			"7. Have fun",
+			0,
+			0,
+			fg,
+			bg,
+			&text_help_7);
+
+		snprintf(score_str, 11, "Score: %d", score);
+
+		draw_text(renderer,
+			font_20,
+			SCREEN_HEIGHT + 4 * SCREEN_UNIT_X,
+			7 * SCREEN_UNIT_Y,
+			score_str,
+			1,
+			0,
+			fg,
+			bg,
+			&text_score);
+
+		draw_snake(renderer, &snake0);
+
+		if (flappy) {
+			draw_pipe(renderer, &gap);
+		} else if (multiplayer)
+			draw_snake(renderer, &snake1);
+		else if (!start)
+			draw_fruit(renderer, fruit);
+
+		if (start || reset) {
+			if (multiplayer) {
+				if (result == 3)
+					snprintf(result_str, 23, "Draw");
+				else if (result > 0)
+					snprintf(result_str, 23,
+						"%s is the winner",
+						result == 1 ?
+						"Player 2" : "Player 1");
+				else
+					snprintf(result_str, 23, "Reset");
+				text_result.cache = 0;
+
+				draw_text(renderer,
+					font_24,
+					SCREEN_HEIGHT / 2,
+					SCREEN_HEIGHT / 2 -
+					0.75 * SCREEN_UNIT_Y,
+					result_str,
+					1,
+					0,
+					fg,
+					bg_s,
+					&text_result);
+			}
+			if (start)
+				draw_text(renderer,
+					font_24,
+					SCREEN_HEIGHT / 2,
+					SCREEN_HEIGHT / 2,
+					"Welcome",
+					1,
+					0,
+					fg,
+					bg_s,
+					&text_welcome);
+			else if (!flappy && !multiplayer &&
+				score == SCREEN_BLOCK / 2)
+				draw_text(renderer,
+					font_24,
+					SCREEN_HEIGHT / 2,
+					SCREEN_HEIGHT / 2,
+					"Why don't you have legs?",
+					1,
+					0,
+					fg,
+					bg_s,
+					&text_clear);
+			else
+				draw_text(renderer,
+					font_24,
+					SCREEN_HEIGHT / 2,
+					SCREEN_HEIGHT / 2,
+					"Game over!",
+					1,
+					0,
+					fg,
+					bg_s,
+					&text_gameover);
+			if (device == SNAKE_KEYBOARD)
+				draw_text(renderer,
+					font_20,
+					SCREEN_HEIGHT / 2,
+					SCREEN_HEIGHT / 2 +
+					0.75 * SCREEN_UNIT_Y,
+					"Press RETURN key for selection",
+					1,
+					0,
+					fg,
+					bg_s,
+					&text_prompt_start);
+			else if (device == SNAKE_TOUCHSCREEN)
+				draw_text(renderer,
+					font_20,
+					SCREEN_HEIGHT / 2,
+					SCREEN_HEIGHT / 2 +
+					0.75 * SCREEN_UNIT_Y,
+					"Tap the option to select",
+					1,
+					0,
+					fg,
+					bg_s,
+					&text_prompt_start);
+			else if (device == SNAKE_CONTROLLER)
+				draw_text(renderer,
+					font_20,
+					SCREEN_HEIGHT / 2,
+					SCREEN_HEIGHT / 2 +
+					0.75 * SCREEN_UNIT_Y,
+					"Press START to select",
+					1,
+					0,
+					fg,
+					bg_s,
+					&text_prompt_start);
+			draw_text(renderer,
+				font_20,
+				SCREEN_HEIGHT / 2,
+				SCREEN_HEIGHT / 2 + 1.5 * SCREEN_UNIT_Y,
+				"Classic",
+				1,
+				device == SNAKE_TOUCHSCREEN ||
+				selection == 0 ? 1 : 0,
+				fg,
+				bg_s,
+				&text_prompt_0);
+			draw_text(renderer,
+				font_20,
+				SCREEN_HEIGHT / 2,
+				SCREEN_HEIGHT / 2 + 2.25 * SCREEN_UNIT_Y,
+				"Multiplayer",
+				1,
+				device == SNAKE_TOUCHSCREEN ||
+				selection == 1 ? 1 : 0,
+				fg,
+				bg_s,
+				&text_prompt_1);
+			draw_text(renderer,
+				font_20,
+				SCREEN_HEIGHT / 2,
+				SCREEN_HEIGHT / 2 + 3 * SCREEN_UNIT_Y,
+				"Flappy",
+				1,
+				device == SNAKE_TOUCHSCREEN ||
+				selection == 2 ? 1 : 0,
+				fg,
+				bg_s,
+				&text_prompt_2);
+		} else if (wait) {
+			draw_text(renderer,
+				font_24,
+				SCREEN_HEIGHT / 2,
+				SCREEN_HEIGHT / 2,
+				"Paused",
+				1,
+				0,
+				fg,
+				bg_s,
+				&text_pause);
+			if (device == SNAKE_KEYBOARD)
+				draw_text(renderer,
+					font_20,
+					SCREEN_HEIGHT / 2,
+					SCREEN_HEIGHT / 2 +
+					0.75 * SCREEN_UNIT_Y,
+					"Press ESCAPE key to resume",
+					1,
+					0,
+					fg,
+					bg_s,
+					&text_prompt_resume);
+			else if (device == SNAKE_TOUCHSCREEN)
+				draw_text(renderer,
+					font_20,
+					SCREEN_HEIGHT / 2,
+					SCREEN_HEIGHT / 2 +
+					0.75 * SCREEN_UNIT_Y,
+					"Tap here to resume",
+					1,
+					1,
+					fg,
+					bg_s,
+					&text_prompt_resume);
+			else if (device == SNAKE_CONTROLLER)
+				draw_text(renderer,
+					font_20,
+					SCREEN_HEIGHT / 2,
+					SCREEN_HEIGHT / 2 +
+					0.75 * SCREEN_UNIT_Y,
+					"Press START to resume",
+					1,
+					0,
+					fg,
+					bg_s,
+					&text_prompt_resume);
+		}
+
+		SDL_RenderPresent(renderer);
+	}
+	return 0;
+}
+
+static void*
+handler_logic(void *args)
+{
+	struct timespec clock_start;
+	struct timespec clock_end;
+	double clock_pass = 0;
+	int pipe_dim[6];
+	int pipe_pos = 0;
+
+	clock_gettime(CLOCK_MONOTONIC, &clock_start);
+
+	for (;;) {
+		pthread_mutex_lock(&mutex);
+		while (start || reset || wait) {
+			if (!wait) {
+				clock_pass = 0;
+				pipe_pos = 0;
+			}
+			pthread_cond_wait(&cond, &mutex);
+			clock_gettime(CLOCK_MONOTONIC, &clock_start);
+		}
+		pthread_mutex_unlock(&mutex);
+
+		if (end)
+			return 0;
+
+		if (flappy) {
+			pthread_mutex_lock(&mutex);
+			while (!begin)
+				pthread_cond_wait(&cond, &mutex);
+			pthread_mutex_unlock(&mutex);
+
+			game_pipe_bound(&gap, pipe_dim);
+
+			if (pipe_pos - SCREEN_UNIT > pipe_dim[0]) {
+				score++;
+				text_score.cache = 0;
+			}
+			pipe_pos = pipe_dim[0];
+
+			if (!god && (collision(
+				(int[]) {snake0->next->x, snake0->next->y,
+				2 * SCREEN_UNIT, SCREEN_UNIT},
+				(int[]) {pipe_dim[0], pipe_dim[2],
+				pipe_dim[1], pipe_dim[3]}) ||
+				collision(
+				(int[]) {snake0->next->x, snake0->next->y,
+				2 * SCREEN_UNIT, SCREEN_UNIT},
+				(int[]) {pipe_dim[0], pipe_dim[4],
+				pipe_dim[1], pipe_dim[5]}) ||
+				snake0->y < 0 ||
+				snake0->y + SCREEN_UNIT > SCREEN_HEIGHT)) {
+				pthread_mutex_lock(&mutex);
+				reset = 1;
+				pthread_mutex_unlock(&mutex);
+			} else {
+				game_pipe_move(&gap);
+
+				game_pipe_pos(&gap, &result);
+				if (result == 3) {
+					game_pipe_del(&gap);
+					game_pipe_add(&gap);
+				} else if (result == 2) {
+					game_pipe_add(&gap);
+				} else if (result == 1) {
+					game_pipe_del(&gap);
+				}
+			}
+		} else if (!multiplayer) {
+			game_snake_move(&snake0, NULL,
+				head[0], !god, &result);
+
+			if (result == 0 || god) {
+				head[1][0] = head[0][0];
+
+				if (collision_block(fruit,
+					(int[]) {snake0->x, snake0->y})) {
+					score++;
+					text_score.cache = 0;
+					game_snake_grow(&snake0);
+
+					if (score == SCREEN_BLOCK / 2) {
+						pthread_mutex_lock(&mutex);
+						reset = 1;
+						pthread_mutex_unlock(&mutex);
+					}
+
+					game_fruit(fruit, &snake0);
+
+					if (delay.tv_nsec - TICK_TIME_DEC >=
+						TICK_TIME_MIN)
+						delay.tv_nsec -= TICK_TIME_DEC;
+				}
+			} else {
+				pthread_mutex_lock(&mutex);
+				reset = 1;
+				pthread_mutex_unlock(&mutex);
+			}
+		} else {
+			game_snake_move(&snake0, &snake1,
+				head[0], !god, &result);
+
+			if (result == 0 || god) {
+				head[1][0] = head[0][0];
+				head[1][1] = head[0][1];
+
+				clock_gettime(CLOCK_MONOTONIC, &clock_end);
+				clock_pass += (clock_end.tv_sec -
+					clock_start.tv_sec) +
+					(clock_end.tv_nsec -
+					clock_start.tv_nsec) * 0.000000001;
+				clock_gettime(CLOCK_MONOTONIC, &clock_start);
+
+				score = clock_pass;
+				text_score.cache = 0;
+				game_snake_grow(&snake0);
+				game_snake_grow(&snake1);
+			} else {
+				pthread_mutex_lock(&mutex);
+				reset = 1;
+				pthread_mutex_unlock(&mutex);
+			}
+		}
+
+		nanosleep(&delay, NULL);
+	}
+}
+
+static void*
+handler_gravity(void *args)
+{
+	const struct timespec delay = {
+		.tv_sec = 0,
+		.tv_nsec = 1000000000 / SCREEN_UNIT
+	};
+
+	for (;;) {
+		pthread_mutex_lock(&mutex);
+		while (!flappy || !begin || start || reset || wait)
+			pthread_cond_wait(&cond, &mutex);
+		pthread_mutex_unlock(&mutex);
+
+		if (end)
+			return 0;
+
+		if (distance > 0) {
+			game_snake_fall(&snake0, 0,
+				distance > speed ? speed : distance);
+			speed++;
+
+			pthread_mutex_lock(&mutex);
+			distance -= distance > speed ? speed : distance;
+			if (distance == 0)
+				speed = 1;
+			pthread_mutex_unlock(&mutex);
+		} else {
+			game_snake_fall(&snake0, 1, speed);
+			speed++;
+		}
+
+		nanosleep(&delay, NULL);
+	}
+}
+
+#ifdef GPIO
+
+#ifdef __FreeBSD__
+
+static void*
+handler_gpio(void *args)
+{
+	const struct timespec delay = {
+		.tv_sec = 0,
+		.tv_nsec = 50000000
+	};
+
+	SDL_Event event;
+	event.type = SDL_CONTROLLERBUTTONUP;
+
+	while (!end) {
+		if (gpio_read(GPIO_PIN_IN0) == 0) {
+			event.cbutton.button =
+				SDL_CONTROLLER_BUTTON_DPAD_LEFT;
+			event.cbutton.which = 0;
+			SDL_PushEvent(&event);
+		} else if (gpio_read(GPIO_PIN_IN1) == 0) {
+			event.cbutton.button =
+				SDL_CONTROLLER_BUTTON_DPAD_UP;
+			event.cbutton.which = 0;
+			SDL_PushEvent(&event);
+		} else if (gpio_read(GPIO_PIN_IN2) == 0) {
+			event.cbutton.button =
+				SDL_CONTROLLER_BUTTON_DPAD_DOWN;
+			event.cbutton.which = 0;
+			SDL_PushEvent(&event);
+		} else if (gpio_read(GPIO_PIN_IN3) == 0) {
+			event.cbutton.button =
+				SDL_CONTROLLER_BUTTON_DPAD_RIGHT;
+			event.cbutton.which = 0;
+			SDL_PushEvent(&event);
+		} else if (gpio_read(GPIO_PIN_IN4) == 0) {
+			event.cbutton.button =
+				SDL_CONTROLLER_BUTTON_BACK;
+			event.cbutton.which = 0;
+			SDL_PushEvent(&event);
+		} else if (gpio_read(GPIO_PIN_IN5) == 0) {
+			event.cbutton.button =
+				SDL_CONTROLLER_BUTTON_GUIDE;
+			event.cbutton.which = 0;
+			SDL_PushEvent(&event);
+		} else if (gpio_read(GPIO_PIN_IN6) == 0) {
+			event.cbutton.button =
+				SDL_CONTROLLER_BUTTON_START;
+			event.cbutton.which = 0;
+			SDL_PushEvent(&event);
+		} else if (gpio_read(GPIO_PIN_IN7) == 0) {
+			event.cbutton.button =
+				SDL_CONTROLLER_BUTTON_A;
+			event.cbutton.which = 0;
+			SDL_PushEvent(&event);
+		} else if (gpio_read(GPIO_PIN_IN8) == 0) {
+			event.cbutton.button =
+				SDL_CONTROLLER_BUTTON_B;
+			event.cbutton.which = 0;
+			SDL_PushEvent(&event);
+		} else if (gpio_read(GPIO_PIN_IN9) == 0) {
+			event.cbutton.button =
+				SDL_CONTROLLER_BUTTON_X;
+			event.cbutton.which = 0;
+			SDL_PushEvent(&event);
+		} else if (gpio_read(GPIO_PIN_IN10) == 0) {
+			event.cbutton.button =
+				SDL_CONTROLLER_BUTTON_Y;
+			event.cbutton.which = 0;
+			SDL_PushEvent(&event);
+		} else if (gpio_read(GPIO_PIN_IN11) == 0) {
+			event.cbutton.button =
+				SDL_CONTROLLER_BUTTON_LEFTSHOULDER;
+			event.cbutton.which = 0;
+			SDL_PushEvent(&event);
+		} else if (gpio_read(GPIO_PIN_IN12) == 0) {
+			event.cbutton.button =
+				SDL_CONTROLLER_BUTTON_RIGHTSHOULDER;
+			event.cbutton.which = 0;
+			SDL_PushEvent(&event);
+		} else if (gpio_read(GPIO_PIN_IN13) == 0) {
+			event.cbutton.button =
+				SDL_CONTROLLER_BUTTON_LEFTSTICK;
+			event.cbutton.which = 0;
+			SDL_PushEvent(&event);
+		} else if (gpio_read(GPIO_PIN_IN14) == 0) {
+			event.cbutton.button =
+				SDL_CONTROLLER_BUTTON_RIGHTSTICK;
+			event.cbutton.which = 0;
+			SDL_PushEvent(&event);
+		} else if (gpio_read(GPIO_PIN_IN15) == 0) {
+			event.cbutton.button =
+				SDL_CONTROLLER_BUTTON_DPAD_LEFT;
+			event.cbutton.which = 1;
+			SDL_PushEvent(&event);
+		} else if (gpio_read(GPIO_PIN_IN16) == 0) {
+			event.cbutton.button =
+				SDL_CONTROLLER_BUTTON_DPAD_UP;
+			event.cbutton.which = 1;
+			SDL_PushEvent(&event);
+		} else if (gpio_read(GPIO_PIN_IN17) == 0) {
+			event.cbutton.button =
+				SDL_CONTROLLER_BUTTON_DPAD_DOWN;
+			event.cbutton.which = 1;
+			SDL_PushEvent(&event);
+		} else if (gpio_read(GPIO_PIN_IN18) == 0) {
+			event.cbutton.button =
+				SDL_CONTROLLER_BUTTON_DPAD_RIGHT;
+			event.cbutton.which = 1;
+			SDL_PushEvent(&event);
+		}
+
+		nanosleep(&delay, NULL);
+	}
+	return 0;
+}
+
+#elif __linux__
+
+static void*
+handler_gpio(void *args)
+{
+	struct pollfd pfd[19];
+	char path[29];
+
+	for (int i = 0; i < 19; i++)
+		pfd[i].events = POLLPRI | POLLERR;
+
+	snprintf(path, 29, "/sys/class/gpio/gpio%d/value", GPIO_PIN_IN0);
+	pfd[0].fd = open(path, O_RDONLY);
+	snprintf(path, 29, "/sys/class/gpio/gpio%d/value", GPIO_PIN_IN1);
+	pfd[1].fd = open(path, O_RDONLY);
+	snprintf(path, 29, "/sys/class/gpio/gpio%d/value", GPIO_PIN_IN2);
+	pfd[2].fd = open(path, O_RDONLY);
+	snprintf(path, 29, "/sys/class/gpio/gpio%d/value", GPIO_PIN_IN3);
+	pfd[3].fd = open(path, O_RDONLY);
+	snprintf(path, 29, "/sys/class/gpio/gpio%d/value", GPIO_PIN_IN4);
+	pfd[4].fd = open(path, O_RDONLY);
+	snprintf(path, 29, "/sys/class/gpio/gpio%d/value", GPIO_PIN_IN5);
+	pfd[5].fd = open(path, O_RDONLY);
+	snprintf(path, 29, "/sys/class/gpio/gpio%d/value", GPIO_PIN_IN6);
+	pfd[6].fd = open(path, O_RDONLY);
+	snprintf(path, 29, "/sys/class/gpio/gpio%d/value", GPIO_PIN_IN7);
+	pfd[7].fd = open(path, O_RDONLY);
+	snprintf(path, 29, "/sys/class/gpio/gpio%d/value", GPIO_PIN_IN8);
+	pfd[8].fd = open(path, O_RDONLY);
+	snprintf(path, 29, "/sys/class/gpio/gpio%d/value", GPIO_PIN_IN9);
+	pfd[9].fd = open(path, O_RDONLY);
+	snprintf(path, 29, "/sys/class/gpio/gpio%d/value", GPIO_PIN_IN10);
+	pfd[10].fd = open(path, O_RDONLY);
+	snprintf(path, 29, "/sys/class/gpio/gpio%d/value", GPIO_PIN_IN11);
+	pfd[11].fd = open(path, O_RDONLY);
+	snprintf(path, 29, "/sys/class/gpio/gpio%d/value", GPIO_PIN_IN12);
+	pfd[12].fd = open(path, O_RDONLY);
+	snprintf(path, 29, "/sys/class/gpio/gpio%d/value", GPIO_PIN_IN13);
+	pfd[13].fd = open(path, O_RDONLY);
+	snprintf(path, 29, "/sys/class/gpio/gpio%d/value", GPIO_PIN_IN14);
+	pfd[14].fd = open(path, O_RDONLY);
+	snprintf(path, 29, "/sys/class/gpio/gpio%d/value", GPIO_PIN_IN15);
+	pfd[15].fd = open(path, O_RDONLY);
+	snprintf(path, 29, "/sys/class/gpio/gpio%d/value", GPIO_PIN_IN16);
+	pfd[16].fd = open(path, O_RDONLY);
+	snprintf(path, 29, "/sys/class/gpio/gpio%d/value", GPIO_PIN_IN17);
+	pfd[17].fd = open(path, O_RDONLY);
+	snprintf(path, 29, "/sys/class/gpio/gpio%d/value", GPIO_PIN_IN18);
+	pfd[18].fd = open(path, O_RDONLY);
+
+	SDL_Event event;
+	event.type = SDL_CONTROLLERBUTTONUP;
+
+	char val[2];
+
+	while (!end) {
+		poll(pfd, 19, -1);
+
+		for (int i = 0; i < 19; i++) {
+			if (pfd[i].revents & (POLLPRI | POLLERR)) {
+				pfd[i].revents &= ~(POLLPRI | POLLERR);
+				read(pfd[i].fd, val, 2);
+				lseek(pfd[i].fd, 0, SEEK_SET);
+
+				if (atoi(val) != 0)
+					continue;
+
+				input_gpio(i % 15, &event.cbutton.button);
+
+				if (i < 15)
+					event.cbutton.which = 0;
+				else
+					event.cbutton.which = 1;
+
+				SDL_PushEvent(&event);
+				break;
+			}
+		}
+	}
+	return 0;
+}
+
+#endif /* __FreeBSD__ */
+
+#endif /* GPIO */
+
+int
+main(void)
+{
+	printf("Snake " VERSION "." RELEASE "." PATCH EXTRA "\n"
+		"Copyright (c) 2019-2020, yzrh <yzrh@noema.org>\n");
+
+	if (SDL_Init(SDL_INIT_VIDEO |
+		SDL_INIT_AUDIO |
+		SDL_INIT_GAMECONTROLLER) != 0) {
+		fprintf(stderr, "SDL initialisation failure: %s\n",
+			SDL_GetError());
+		return 1;
+	}
+
+	SDL_Window *window = SDL_CreateWindow(
+		"Snake " VERSION "." RELEASE "." PATCH EXTRA,
+		SDL_WINDOWPOS_UNDEFINED,
+		SDL_WINDOWPOS_UNDEFINED,
+		SCREEN_WIDTH,
+		SCREEN_HEIGHT,
+		SDL_WINDOW_OPENGL);
+
+	if (window == NULL) {
+		fprintf(stderr, "Window creation failure: %s\n",
+			SDL_GetError());
+		return 1;
+	}
+
+	renderer = SDL_CreateRenderer(
+		window,
+		-1,
+		SDL_RENDERER_ACCELERATED |
+		SDL_RENDERER_PRESENTVSYNC);
+
+	if (renderer == NULL) {
+		fprintf(stderr, "Renderer creation failure: %s\n",
+			SDL_GetError());
+		return 1;
+	}
+
+	if (TTF_Init() != 0) {
+		fprintf(stderr, "TTF initialisation failure: %s\n",
+			TTF_GetError());
+		return 1;
+	}
+
+	font_20 = TTF_OpenFont("../contrib/font.ttf", 20);
+	font_24 = TTF_OpenFont("../contrib/font.ttf", 24);
+
+	if (font_20 == NULL) {
+		font_20 = TTF_OpenFont("/usr/local/share/snake/font.ttf", 20);
+		font_24 = TTF_OpenFont("/usr/local/share/snake/font.ttf", 24);
+	}
+
+	if (font_20 == NULL) {
+		font_20 = TTF_OpenFont("/usr/share/snake/font.ttf", 20);
+		font_24 = TTF_OpenFont("/usr/share/snake/font.ttf", 24);
+	}
+
+	if (font_20 == NULL) {
+		fprintf(stderr, "%s\n", TTF_GetError());
+		return 1;
+	}
+
+#ifdef SOUND
+
+	if ((Mix_Init(MIX_INIT_FLAC) & MIX_INIT_FLAC) != MIX_INIT_FLAC)
+		fprintf(stderr, "Mixer initialisation failure: %s\n",
+			Mix_GetError());
+
+	if (Mix_OpenAudio(48000, AUDIO_S16SYS, 2, 4096) == -1)
+		fprintf(stderr, "%s\n", Mix_GetError());
+
+	Mix_Music *music = Mix_LoadMUS("../contrib/music.flac");
+
+	if (music == NULL)
+		music = Mix_LoadMUS("/usr/local/share/snake/music.flac");
+
+	if (music == NULL)
+		music = Mix_LoadMUS("/usr/share/snake/music.flac");
+
+	if (music == NULL)
+		fprintf(stderr, "%s\n", Mix_GetError());
+
+	if (Mix_PlayMusic(music, -1) == -1)
+		fprintf(stderr, "Audio playback failure: %s\n",
+			Mix_GetError());
+
+#endif /* SOUND */
+
+#ifdef GPIO
+
+#ifdef __linux__
+
+	gpio_export(GPIO_PIN_IN0);
+	gpio_export(GPIO_PIN_IN1);
+	gpio_export(GPIO_PIN_IN2);
+	gpio_export(GPIO_PIN_IN3);
+	gpio_export(GPIO_PIN_IN4);
+	gpio_export(GPIO_PIN_IN5);
+	gpio_export(GPIO_PIN_IN6);
+	gpio_export(GPIO_PIN_IN7);
+	gpio_export(GPIO_PIN_IN8);
+	gpio_export(GPIO_PIN_IN9);
+	gpio_export(GPIO_PIN_IN10);
+	gpio_export(GPIO_PIN_IN11);
+	gpio_export(GPIO_PIN_IN12);
+	gpio_export(GPIO_PIN_IN13);
+	gpio_export(GPIO_PIN_IN14);
+	gpio_export(GPIO_PIN_IN15);
+	gpio_export(GPIO_PIN_IN16);
+	gpio_export(GPIO_PIN_IN17);
+	gpio_export(GPIO_PIN_IN18);
+
+	/* Wait for sysfs directory to show up */
+	sleep(1);
+
+#endif /* __linux__ */
+
+	gpio_config(GPIO_PIN_IN0, GPIO_IN, GPIO_INT);
+	gpio_config(GPIO_PIN_IN1, GPIO_IN, GPIO_INT);
+	gpio_config(GPIO_PIN_IN2, GPIO_IN, GPIO_INT);
+	gpio_config(GPIO_PIN_IN3, GPIO_IN, GPIO_INT);
+	gpio_config(GPIO_PIN_IN4, GPIO_IN, GPIO_INT);
+	gpio_config(GPIO_PIN_IN5, GPIO_IN, GPIO_INT);
+	gpio_config(GPIO_PIN_IN6, GPIO_IN, GPIO_INT);
+	gpio_config(GPIO_PIN_IN7, GPIO_IN, GPIO_INT);
+	gpio_config(GPIO_PIN_IN8, GPIO_IN, GPIO_INT);
+	gpio_config(GPIO_PIN_IN9, GPIO_IN, GPIO_INT);
+	gpio_config(GPIO_PIN_IN10, GPIO_IN, GPIO_INT);
+	gpio_config(GPIO_PIN_IN11, GPIO_IN, GPIO_INT);
+	gpio_config(GPIO_PIN_IN12, GPIO_IN, GPIO_INT);
+	gpio_config(GPIO_PIN_IN13, GPIO_IN, GPIO_INT);
+	gpio_config(GPIO_PIN_IN14, GPIO_IN, GPIO_INT);
+	gpio_config(GPIO_PIN_IN15, GPIO_IN, GPIO_INT);
+	gpio_config(GPIO_PIN_IN16, GPIO_IN, GPIO_INT);
+	gpio_config(GPIO_PIN_IN17, GPIO_IN, GPIO_INT);
+	gpio_config(GPIO_PIN_IN18, GPIO_IN, GPIO_INT);
+
+#endif /* GPIO */
+
+	int seed;
+	int random = open("/dev/random", O_RDONLY);
+	if (read(random, &seed, sizeof(int)) > 0)
+		srand(seed);
+	close(random);
+
+	SDL_JoystickID player = 0;
+	SDL_Event event;
+
+	pthread_mutex_init(&mutex, NULL);
+	pthread_cond_init(&cond, NULL);
+	pthread_t th_renderer;
+	pthread_t th_logic;
+	pthread_t th_gravity;
+
+	#ifdef GPIO
+
+	pthread_t th_gpio;
+
+	#endif /* GPIO */
+
+	pthread_create(&th_renderer, NULL, handler_rendering, NULL);
+	pthread_create(&th_logic, NULL, handler_logic, NULL);
+	pthread_create(&th_gravity, NULL, handler_gravity, NULL);
+
+	#ifdef GPIO
+
+	pthread_create(&th_gpio, NULL, handler_gpio, NULL);
+
+	#endif /* GPIO */
+
+	while (SDL_WaitEvent(&event)) {
+		if (event.type == SDL_QUIT)
+			break;
+
+		switch (event.type) {
+			case SDL_KEYUP:
+				if (device != SNAKE_KEYBOARD) {
+					device = SNAKE_KEYBOARD;
+					text_help_1.cache = 0;
+					text_help_2.cache = 0;
+					text_help_3.cache = 0;
+					text_help_4.cache = 0;
+					text_help_5.cache = 0;
+					text_help_6.cache = 0;
+					text_prompt_start.cache = 0;
+					text_prompt_resume.cache = 0;
+				}
+				input_keyboard(event.key.keysym.sym, &input);
+				if (multiplayer &&
+					(event.key.keysym.sym ==
+					SDLK_s ||
+					event.key.keysym.sym ==
+					SDLK_e ||
+					event.key.keysym.sym ==
+					SDLK_d ||
+					event.key.keysym.sym ==
+					SDLK_f))
+					player = 1;
+				else
+					player = 0;
+				break;
+			case SDL_FINGERUP:
+				if (device != SNAKE_TOUCHSCREEN) {
+					device = SNAKE_TOUCHSCREEN;
+					text_help_1.cache = 0;
+					text_help_2.cache = 0;
+					text_help_3.cache = 0;
+					text_help_4.cache = 0;
+					text_help_5.cache = 0;
+					text_help_6.cache = 0;
+					text_prompt_start.cache = 0;
+					text_prompt_resume.cache = 0;
+				}
+				if (start || reset || wait) {
+					if (collision_bound(
+						event.tfinger.x,
+						event.tfinger.y,
+						&text_help_5)) {
+						input = SNAKE_RESET;
+					} else if (collision_bound(
+						event.tfinger.x,
+						event.tfinger.y,
+						&text_help_6)) {
+						input = SNAKE_MUSIC;
+					} else if (wait) {
+						if (collision_bound(
+							event.tfinger.x,
+							event.tfinger.y,
+							&text_prompt_resume))
+							input = SNAKE_PAUSE;
+					} else {
+						if (collision_bound(
+							event.tfinger.x,
+							event.tfinger.y,
+							&text_prompt_0)) {
+							selection = 0;
+							input = SNAKE_SELECT;
+						} else if (collision_bound(
+							event.tfinger.x,
+							event.tfinger.y,
+							&text_prompt_1)) {
+							selection = 1;
+							input = SNAKE_SELECT;
+						} else if (collision_bound(
+							event.tfinger.x,
+							event.tfinger.y,
+							&text_prompt_2)) {
+							selection = 2;
+							input = SNAKE_SELECT;
+						}
+					}
+				} else if (collision_bound(
+					event.tfinger.x,
+					event.tfinger.y,
+					&text_help_4)) {
+					input = SNAKE_PAUSE;
+				} else if (collision_bound(
+					event.tfinger.x,
+					event.tfinger.y,
+					&text_help_5)) {
+					input = SNAKE_RESET;
+				} else if (collision_bound(
+					event.tfinger.x,
+					event.tfinger.y,
+					&text_help_6)) {
+					input = SNAKE_MUSIC;
+				} else if (collision_bound(
+					event.tfinger.x,
+					event.tfinger.y,
+					&text_help_top)) {
+					input = SNAKE_GOD;
+				} else if (collision_bound(
+					event.tfinger.x,
+					event.tfinger.y,
+					&text_score)) {
+					input = SNAKE_GROW;
+				} else if (collision_bound(
+					event.tfinger.x,
+					event.tfinger.y,
+					&text_title)) {
+					input = SNAKE_TELEPORT;
+				} else if (collision_bound(
+					event.tfinger.x,
+					event.tfinger.y,
+					&text_help_1)) {
+					input = SNAKE_TICK_DECREASE;
+				} else if (collision_bound(
+					event.tfinger.x,
+					event.tfinger.y,
+					&text_help_7)) {
+					input = SNAKE_TICK_INCREASE;
+				} else if (flappy) {
+					input = SNAKE_JUMP;
+				} else {
+					input = SNAKE_EMPTY;
+				}
+				break;
+			case SDL_FINGERMOTION:
+				if (device != SNAKE_TOUCHSCREEN) {
+					device = SNAKE_TOUCHSCREEN;
+					text_help_1.cache = 0;
+					text_help_2.cache = 0;
+					text_help_3.cache = 0;
+					text_help_4.cache = 0;
+					text_help_5.cache = 0;
+					text_help_6.cache = 0;
+					text_prompt_start.cache = 0;
+					text_prompt_resume.cache = 0;
+				}
+				if ((event.tfinger.dx *
+					event.tfinger.dx) >
+					(event.tfinger.dy *
+					event.tfinger.dy)) {
+					if (event.tfinger.dx > 1)
+						input = SNAKE_RIGHT;
+					else if (event.tfinger.dx < -1)
+						input = SNAKE_LEFT;
+				} else {
+					if (event.tfinger.dy > 1)
+						input = SNAKE_DOWN;
+					else if (event.tfinger.dy < -1)
+						input = SNAKE_UP;
+				}
+				if (multiplayer &&
+					event.tfinger.x > SCREEN_HEIGHT / 2)
+					player = 1;
+				else
+					player = 0;
+				break;
+			case SDL_CONTROLLERBUTTONUP:
+				if (device != SNAKE_CONTROLLER) {
+					device = SNAKE_CONTROLLER;
+					text_help_1.cache = 0;
+					text_help_2.cache = 0;
+					text_help_3.cache = 0;
+					text_help_4.cache = 0;
+					text_help_5.cache = 0;
+					text_help_6.cache = 0;
+					text_prompt_start.cache = 0;
+					text_prompt_resume.cache = 0;
+				}
+				input_controller(event.cbutton.button, &input);
+				player = event.cbutton.which;
+				break;
+			default:
+				break;
+		}
+
+		if (!start && !reset && !wait) {
+			switch (input) {
+				case SNAKE_LEFT:
+					if (head[1][player] != SNAKE_RIGHT)
+						head[0][player] = SNAKE_LEFT;
+					break;
+				case SNAKE_UP:
+					if (head[1][player] != SNAKE_DOWN)
+						head[0][player] = SNAKE_UP;
+					break;
+				case SNAKE_DOWN:
+					if (head[1][player] != SNAKE_UP)
+						head[0][player] = SNAKE_DOWN;
+					break;
+				case SNAKE_RIGHT:
+					if (head[1][player] != SNAKE_LEFT)
+						head[0][player] = SNAKE_RIGHT;
+					break;
+				case SNAKE_JUMP:
+					if (!begin) {
+						pthread_mutex_lock(&mutex);
+						begin = 1;
+						pthread_cond_broadcast(&cond);
+						pthread_mutex_unlock(&mutex);
+					}
+					if (flappy) {
+						pthread_mutex_lock(&mutex);
+						distance += PIPE_GAP / 2 *
+							SCREEN_UNIT;
+						if (distance == 0)
+							speed = 1;
+						pthread_mutex_unlock(&mutex);
+					}
+					break;
+				case SNAKE_RESET:
+					pthread_mutex_lock(&mutex);
+					reset = 1;
+					pthread_mutex_unlock(&mutex);
+					break;
+				case SNAKE_GOD:
+					god = 1;
+					break;
+				case SNAKE_GROW:
+					if (god && !flappy && !multiplayer)
+						game_snake_grow(&snake0);
+					break;
+				case SNAKE_TELEPORT:
+					if (god) {
+						snake0->x = snake0->y =
+							SCREEN_HEIGHT / 2;
+						if (flappy) {
+							snake0->next->x =
+								SCREEN_HEIGHT /
+								2 - SCREEN_UNIT;
+							snake0->next->y =
+								SCREEN_HEIGHT /
+								2;
+						}
+					}
+					break;
+				case SNAKE_MUSIC:
+#ifdef SOUND
+					if (Mix_PausedMusic())
+						Mix_ResumeMusic();
+					else
+						Mix_PauseMusic();
+#endif /* SOUND */
+					break;
+				case SNAKE_TICK_DECREASE:
+					if (god && !flappy && delay.tv_nsec -
+						TICK_TIME_DEC >= TICK_TIME_MIN)
+						delay.tv_nsec -= TICK_TIME_DEC;
+					break;
+				case SNAKE_TICK_INCREASE:
+					if (god && !flappy)
+						delay.tv_nsec += TICK_TIME_DEC;
+					break;
+				case SNAKE_PAUSE:
+					wait = 1;
+					break;
+				default:
+					break;
+			}
+		} else {
+			switch (input) {
+				case SNAKE_RESET:
+					wait = 0;
+
+					pthread_mutex_lock(&mutex);
+					reset = 1;
+					pthread_mutex_unlock(&mutex);
+					break;
+				case SNAKE_MUSIC:
+#ifdef SOUND
+					if (Mix_PausedMusic())
+						Mix_ResumeMusic();
+					else
+						Mix_PauseMusic();
+#endif /* SOUND */
+					break;
+				case SNAKE_SELECT:
+					if (wait)
+						break;
+
+					if (selection == 0) {
+						flappy = 0;
+						multiplayer = 0;
+					} else if (selection == 1) {
+						flappy = 0;
+						multiplayer = 1;
+					} else if (selection == 2) {
+						multiplayer = 0;
+						flappy = 1;
+					}
+
+					delay.tv_nsec = TICK_TIME_INIT;
+
+					god = 0;
+
+					head[0][0] = head[0][1] =
+						SNAKE_UP;
+					head[1][0] = head[1][1] =
+						SNAKE_EMPTY;
+
+					score = 0;
+					text_score.cache = 0;
+
+					if (flappy) {
+						delay.tv_nsec = TICK_TIME_INIT /
+							SCREEN_UNIT;
+
+						game_snake_init(&snake0, 0);
+
+						snake0->next->x =
+							SCREEN_HEIGHT / 2 -
+							SCREEN_UNIT;
+						snake0->next->y =
+							SCREEN_HEIGHT / 2;
+
+						game_pipe_init(&gap);
+
+						pthread_mutex_lock(&mutex);
+						begin = 0;
+						distance = 0;
+						speed = 1;
+						pthread_mutex_unlock(&mutex);
+					} else if (!multiplayer) {
+						game_snake_init(
+							&snake0, 0);
+						game_fruit(
+							fruit,
+							&snake0);
+					} else {
+						game_snake_init(
+							&snake0,
+							-4 *
+							SCREEN_UNIT);
+						game_snake_init(
+							&snake1,
+							4 *
+							SCREEN_UNIT);
+					}
+					start = 0;
+
+					pthread_mutex_lock(&mutex);
+					reset = 0;
+					pthread_cond_broadcast(&cond);
+					pthread_mutex_unlock(&mutex);
+					break;
+				case SNAKE_PAUSE:
+					wait = 0;
+
+					pthread_mutex_lock(&mutex);
+					pthread_cond_broadcast(&cond);
+					pthread_mutex_unlock(&mutex);
+					break;
+				case SNAKE_UP:
+					if ((start || reset) &&
+						selection - 1 >= 0)
+						selection--;
+					break;
+				case SNAKE_DOWN:
+					if ((start || reset) &&
+						selection + 1 <= 2)
+						selection++;
+					break;
+				default:
+					break;
+			}
+		}
+		input = SNAKE_EMPTY;
+	}
+
+	start = 0;
+	end = 1;
+
+	wait = 0;
+	flappy = 1;
+
+	pthread_mutex_lock(&mutex);
+	reset = 0;
+	pthread_cond_broadcast(&cond);
+	pthread_mutex_unlock(&mutex);
+
+	#ifdef GPIO
+
+	pthread_join(th_gpio, NULL);
+
+	#endif /* GPIO */
+
+	pthread_join(th_gravity, NULL);
+	pthread_join(th_logic, NULL);
+	pthread_join(th_renderer, NULL);
+	pthread_cond_destroy(&cond);
+	pthread_mutex_destroy(&mutex);
+
+#ifdef GPIO
+
+#ifdef __linux__
+
+	gpio_unexport(GPIO_PIN_IN0);
+	gpio_unexport(GPIO_PIN_IN1);
+	gpio_unexport(GPIO_PIN_IN2);
+	gpio_unexport(GPIO_PIN_IN3);
+	gpio_unexport(GPIO_PIN_IN4);
+	gpio_unexport(GPIO_PIN_IN5);
+	gpio_unexport(GPIO_PIN_IN6);
+	gpio_unexport(GPIO_PIN_IN7);
+	gpio_unexport(GPIO_PIN_IN8);
+	gpio_unexport(GPIO_PIN_IN9);
+	gpio_unexport(GPIO_PIN_IN10);
+	gpio_unexport(GPIO_PIN_IN11);
+	gpio_unexport(GPIO_PIN_IN12);
+	gpio_unexport(GPIO_PIN_IN13);
+	gpio_unexport(GPIO_PIN_IN14);
+	gpio_unexport(GPIO_PIN_IN15);
+	gpio_unexport(GPIO_PIN_IN16);
+	gpio_unexport(GPIO_PIN_IN17);
+	gpio_unexport(GPIO_PIN_IN18);
+
+#endif /* __linux__ */
+
+#endif /* GPIO */
+
+#ifdef SOUND
+	Mix_Quit();
+#endif /* SOUND */
+
+	TTF_Quit();
+	SDL_DestroyRenderer(renderer);
+	SDL_DestroyWindow(window);
+	SDL_Quit();
+}