1 files changed, 114 insertions, 0 deletions
diff --git a/src/eetg.h b/src/eetg.h
new file mode 100644
index 0000000..411eb83
--- /dev/null
+++ b/src/eetg.h
@@ -0,0 +1,114 @@
+/*
+ * 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 */