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/*
* Copyright (c) 2024 Richard Braun.
*
* Permission to use, copy, modify, and/or distribute this software for
* any purpose with or without fee is hereby granted.
*
* THE SOFTWARE IS PROVIDED “AS IS” AND THE AUTHOR DISCLAIMS ALL
* WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE
* FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY
* DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
* OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*
* Engine for embedded text-based games.
*/
#ifndef EETG_H
#define EETG_H
#include <stdbool.h>
#include <stdint.h>
#define EETG_COLUMNS 80
#define EETG_ROWS 24
#define EETG_RAND_MAX 32767
#define EETG_COLOR_BLACK 0
#define EETG_COLOR_RED 1
#define EETG_COLOR_GREEN 2
#define EETG_COLOR_YELLOW 3
#define EETG_COLOR_BLUE 4
#define EETG_COLOR_MAGENTA 5
#define EETG_COLOR_CYAN 6
#define EETG_COLOR_WHITE 7
struct eetg_world;
struct eetg_object;
typedef void (*eetg_write_fn)(const void *buffer, size_t size, void *arg);
typedef void (*eetg_handle_collision_fn)(struct eetg_object *object1,
struct eetg_object *object2,
int x, int y, void *arg);
struct eetg_object {
struct eetg_world *world;
struct eetg_object *next;
const char *sprite;
int8_t color;
int8_t type;
int8_t x;
int8_t y;
int8_t width;
int8_t height;
};
struct eetg_view_cell {
char c;
int8_t color;
};
struct eetg_view_row {
struct eetg_view_cell columns[EETG_COLUMNS];
};
struct eetg_view {
struct eetg_view_row rows[EETG_ROWS];
};
struct eetg_world {
eetg_write_fn write_fn;
void *write_fn_arg;
eetg_handle_collision_fn handle_collision_fn;
void *handle_collision_fn_arg;
struct eetg_object *objects;
struct eetg_view views[2];
struct eetg_view *view;
struct eetg_view *prev_view;
int8_t cursor_row;
int8_t cursor_column;
int8_t current_color;
};
void eetg_world_init(struct eetg_world *world,
eetg_write_fn write_fn, void *arg);
void eetg_world_clear(struct eetg_world *world);
void eetg_world_register_collision_fn(struct eetg_world *world,
eetg_handle_collision_fn handle_collision_fn, void *arg);
void eetg_world_add(struct eetg_world *world, struct eetg_object *object,
int x, int y);
void eetg_world_remove(struct eetg_world *world, struct eetg_object *object);
void eetg_world_render(struct eetg_world *world, bool sync);
void eetg_object_init(struct eetg_object *object, int type, const char *sprite);
void eetg_object_set_color(struct eetg_object *object, int color);
int eetg_object_get_type(const struct eetg_object *object);
const char *eetg_object_get_sprite(const struct eetg_object *object);
int eetg_object_get_x(const struct eetg_object *object);
int eetg_object_get_y(const struct eetg_object *object);
int eetg_object_get_width(const struct eetg_object *object);
int eetg_object_get_height(const struct eetg_object *object);
bool eetg_object_is_empty(const struct eetg_object *object);
void eetg_object_move(struct eetg_object *object, int x, int y);
int eetg_object_get_cell(const struct eetg_object *object, int x, int y);
struct eetg_world *eetg_object_get_world(const struct eetg_object *object);
void eetg_init_rand(unsigned int seed);
int eetg_rand(void);
#endif /* EETG_H */
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