partially done work on total source tree rework, separation of engine context and game context, generalization of renderer for different backends as well as web platform target

2024-09-16 09:07:01 +03:00
parent ca0305feab
commit 551d60ef85
59 changed files with 2892 additions and 890 deletions
--- a/include/twn_input.h
+++ b/include/twn_input.h
@@ -0,0 +1,101 @@
+#ifndef TWN_INPUT_H
+#define TWN_INPUT_H
+
+#include "twn_config.h"
+#include "twn_vec.h"
+#include "twn_util.h"
+#include "twn_engine_api.h"
+
+#include <SDL2/SDL.h>
+
+#include <stdint.h>
+#include <stdbool.h>
+
+
+enum button_source {
+    BUTTON_SOURCE_NOT_SET,
+    BUTTON_SOURCE_KEYBOARD_PHYSICAL,
+    BUTTON_SOURCE_KEYBOARD_CHARACTER,
+    BUTTON_SOURCE_GAMEPAD,
+    BUTTON_SOURCE_MOUSE,
+};
+
+
+union button_code {
+    SDL_Scancode scancode;
+    SDL_Keycode keycode;
+    SDL_GameControllerButton gamepad_button;
+    uint8_t mouse_button;   /* SDL_BUTTON_ enum */
+};
+
+
+/* an input to which an action is bound */
+/* it is not limited to literal buttons */
+struct button {
+    enum button_source source;
+    union button_code code;
+};
+
+
+/* represents the collective state of a group of buttons */
+/* that is, changes in the states of any of the bound buttons will affect it */
+struct action {
+    size_t num_bindings;
+
+    /* if you bind more than NUM_KEYBIND_SLOTS (set in config.h) */
+    /* it forgets the first button to add the new one at the end */
+    struct button bindings[NUM_KEYBIND_SLOTS];
+
+    t_fvec2 position;        /* set if applicable, e.g. mouse click */
+    bool is_pressed;
+    bool just_changed;
+};
+
+
+struct action_hash_item {
+    char *key;
+    struct action value;
+};
+
+
+struct input_state {
+    struct action_hash_item *action_hash;
+    const uint8_t *keyboard_state; /* array of booleans indexed by scancode */
+    uint32_t mouse_state;          /* SDL mouse button bitmask */
+    t_vec2 mouse_window_position;
+    t_vec2 mouse_relative_position;
+    enum button_source last_active_source;
+    bool is_anything_just_pressed;
+};
+
+
+TWN_API void input_state_init(struct input_state *input);
+TWN_API void input_state_deinit(struct input_state *input);
+TWN_API void input_state_update(struct input_state *input);
+
+TWN_API void input_bind_action_scancode(struct input_state *input,
+                                char *action_name,
+                                SDL_Scancode scancode);
+TWN_API void input_unbind_action_scancode(struct input_state *input,
+                                  char *action_name,
+                                  SDL_Scancode scancode);
+TWN_API void input_bind_action_mouse(struct input_state *input,
+                             char *action_name,
+                             uint8_t mouse_button);
+TWN_API void input_unbind_action_mouse(struct input_state *input,
+                               char *action_name,
+                               uint8_t mouse_button);
+
+TWN_API void input_add_action(struct input_state *input, char *action_name);
+TWN_API void input_delete_action(struct input_state *input, char *action_name);
+
+TWN_API bool input_is_action_pressed(struct input_state *input, char *action_name);
+TWN_API bool input_is_action_just_pressed(struct input_state *input, char *action_name);
+TWN_API bool input_is_action_just_released(struct input_state *input, char *action_name);
+
+TWN_API t_fvec2 input_get_action_position(struct input_state *input, char *action_name);
+
+TWN_API void input_set_mouse_captured(struct input_state *input, bool value);
+TWN_API bool input_is_mouse_captured(struct input_state *input);
+
+#endif