vlad.website
A 3D game engine from scratch.
1// (c) 2020 Vlad-Stefan Harbuz <vlad@vladh.net>
2
3#pragma once
4
5#include <GLFW/glfw3.h>
6#include "types.hpp"
7
8class input {
9public:
10 static constexpr u32 MAX_TEXT_INPUT_LENGTH = 512;
11 static constexpr u32 MAX_TEXT_INPUT_COMMAND_LENGTH = 50;
12 static constexpr u32 MAX_TEXT_INPUT_ARGUMENTS_LENGTH =
13 MAX_TEXT_INPUT_LENGTH - MAX_TEXT_INPUT_COMMAND_LENGTH;
14
15 enum class CursorType {
16 none,
17 arrow,
18 ibeam,
19 crosshair,
20 hand,
21 hresize,
22 vresize,
23 };
24
25 struct State {
26 GLFWwindow *window;
27 bool is_cursor_enabled;
28 v2 mouse_pos;
29 v2 mouse_offset;
30 v2 mouse_3d_offset;
31 f64 mouse_3d_sensitivity;
32 bool mouse_button_states[GLFW_MOUSE_BUTTON_LAST];
33 u32 n_mouse_button_state_changes_this_frame[GLFW_MOUSE_BUTTON_LAST];
34 bool key_states[GLFW_KEY_LAST];
35 u32 n_key_state_changes_this_frame[GLFW_KEY_LAST];
36 GLFWcursor *current_cursor;
37 GLFWcursor *arrow_cursor;
38 GLFWcursor *ibeam_cursor;
39 GLFWcursor *crosshair_cursor;
40 GLFWcursor *hand_cursor;
41 GLFWcursor *hresize_cursor;
42 GLFWcursor *vresize_cursor;
43 bool have_ever_gotten_mouse_pos;
44 bool is_text_input_enabled;
45 char text_input[MAX_TEXT_INPUT_LENGTH];
46 };
47
48 static char * get_text_input();
49 static bool is_cursor_enabled();
50 static void set_is_cursor_enabled(bool val);
51 static bool is_text_input_enabled();
52 static v2 get_mouse_offset();
53 static v2 get_mouse_3d_offset();
54 static void update_mouse_button(int button, int action, int mods);
55 static bool is_mouse_button_down(int button);
56 static bool is_mouse_button_up(int button);
57 static bool is_mouse_button_now_down(int button);
58 static bool is_mouse_button_now_up(int button);
59 static void update_mouse(v2 new_mouse_pos);
60 static void clear_text_input();
61 static void enable_text_input();
62 static void disable_text_input();
63 static void do_text_input_backspace();
64 static void update_text_input(u32 codepoint);
65 static void update_keys(int key, int scancode, int action, int mods);
66 static bool is_key_down(int key);
67 static bool is_key_up(int key);
68 static bool is_key_now_down(int key);
69 static bool is_key_now_up(int key);
70 static bool is_mouse_in_bb(v2 topleft, v2 bottomright);
71 static void set_cursor(GLFWcursor *new_cursor);
72 static void set_cursor(CursorType type);
73 static void reset_n_mouse_button_state_changes_this_frame();
74 static void reset_n_key_state_changes_this_frame();
75 static void init(input::State *state, GLFWwindow *window);
76
77private:
78 static input::State *state;
79};