src/main.c

   1 #include <SDL2/SDL.h>
   2 #include <SDL2/SDL_mixer.h>
   3
   4 #include <stdint.h>
   5 #include <stdio.h>
   6 #include <stdlib.h>
   7 #include <time.h>
   8
   9 #include "game.h"
  10 #include "game/level/platforms.h"
  11 #include "game/level/player.h"
  12 #include "game/sound_samples.h"
  13 #include "math/minmax.h"
  14 #include "math/point.h"
  15 #include "system/error.h"
  16 #include "system/lt.h"
  17
  18 #define SCREEN_WIDTH 800
  19 #define SCREEN_HEIGHT 600
  20 #define GAME_FPS 60
  21
  22 /* LT module adapter for Mix_CloseAudio */
  23 static void Mix_CloseAudio_lt(void* ignored)
  24 {
  25     (void) ignored;
  26     Mix_CloseAudio();
  27 }
  28
  29 /* LT module adapter for SDL_Quit */
  30 static void SDL_Quit_lt(void* ignored)
  31 {
  32     (void) ignored;
  33     SDL_Quit();
  34 }
  35
  36 static void print_usage(FILE *stream)
  37 {
  38     fprintf(stream, "Usage: nothing <level-file>\n");
  39 }
  40
  41 int main(int argc, char *argv[])
  42 {
  43     srand((unsigned int) time(NULL));
  44
  45     lt_t *const lt = create_lt();
  46
  47     if (argc < 2) {
  48         print_usage(stderr);
  49         RETURN_LT(lt, -1);
  50     }
  51
  52     if (SDL_Init(SDL_INIT_EVERYTHING) < 0) {
  53         print_error_msg(ERROR_TYPE_SDL2, "Could not initialize SDL");
  54         RETURN_LT(lt, -1);
  55     }
  56     PUSH_LT(lt, 42, SDL_Quit_lt);
  57
  58     SDL_ShowCursor(SDL_DISABLE);
  59
  60     SDL_Window *const window = PUSH_LT(
  61         lt,
  62         SDL_CreateWindow(
  63             "Nothing",
  64             100, 100,
  65             SCREEN_WIDTH, SCREEN_HEIGHT,
  66             SDL_WINDOW_SHOWN | SDL_WINDOW_RESIZABLE),
  67         SDL_DestroyWindow);
  68
  69     if (window == NULL) {
  70         print_error_msg(ERROR_TYPE_SDL2, "Could not create SDL window");
  71         RETURN_LT(lt, -1);
  72     }
  73
  74     SDL_Renderer *const renderer = PUSH_LT(
  75         lt,
  76         SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC),
  77         SDL_DestroyRenderer);
  78     if (renderer == NULL) {
  79         print_error_msg(ERROR_TYPE_SDL2, "Could not create SDL renderer");
  80         RETURN_LT(lt, -1);
  81     }
  82     if (SDL_SetRenderDrawBlendMode(renderer, SDL_BLENDMODE_BLEND) < 0) {
  83         print_error_msg(ERROR_TYPE_SDL2, "Could not set up blending mode for the renderer");
  84         RETURN_LT(lt, -1);
  85     }
  86
  87     SDL_Joystick *the_stick_of_joy = NULL;
  88
  89     if (SDL_NumJoysticks() > 0) {
  90         the_stick_of_joy = PUSH_LT(lt, SDL_JoystickOpen(0), SDL_JoystickClose);
  91
  92         if (the_stick_of_joy == NULL) {
  93             print_error_msg(ERROR_TYPE_SDL2, "Could not open 0th Stick of the Joy: %s\n");
  94             RETURN_LT(lt, -1);
  95         }
  96
  97         printf("Opened Joystick 0\n");
  98         printf("Name: %s\n", SDL_JoystickNameForIndex(0));
  99         printf("Number of Axes: %d\n", SDL_JoystickNumAxes(the_stick_of_joy));
 100         printf("Number of Buttons: %d\n", SDL_JoystickNumButtons(the_stick_of_joy));
 101         printf("Number of Balls: %d\n", SDL_JoystickNumBalls(the_stick_of_joy));
 102
 103         SDL_JoystickEventState(SDL_ENABLE);
 104     } else {
 105         fprintf(stderr, "[WARNING] Could not find any Sticks of the Joy\n");
 106     }
 107
 108     if (Mix_OpenAudio(
 109             MIX_DEFAULT_FREQUENCY,
 110             MIX_DEFAULT_FORMAT,
 111             2,
 112             1024) < 0) {
 113         print_error_msg(ERROR_TYPE_SDL2_MIXER, "Could not initialize the audio\n");
 114         RETURN_LT(lt, -1);
 115     }
 116     PUSH_LT(lt, 42, Mix_CloseAudio_lt);
 117
 118     // ------------------------------
 119
 120     const char * sound_sample_files[] = {
 121         "./sounds/nothing.wav",
 122         "./sounds/something.wav"
 123     };
 124     const size_t sound_sample_files_count = sizeof(sound_sample_files) / sizeof(char*);
 125
 126     game_t *const game = PUSH_LT(
 127         lt,
 128         create_game(
 129             argv[1],
 130             sound_sample_files,
 131             sound_sample_files_count,
 132             renderer),
 133         destroy_game);
 134     if (game == NULL) {
 135         print_current_error_msg("Could not create the game object");
 136         RETURN_LT(lt, -1);
 137     }
 138
 139     const Uint8 *const keyboard_state = SDL_GetKeyboardState(NULL);
 140
 141     SDL_Event e;
 142     int64_t last_time = (int64_t) SDL_GetTicks();
 143     const int64_t expected_delay_ms = (int64_t) (1000.0f / GAME_FPS);
 144     while (!game_over_check(game)) {
 145         const int64_t current_time = (int64_t) SDL_GetTicks();
 146
 147         if (current_time == last_time) {
 148             SDL_Delay((int) expected_delay_ms);
 149             last_time = current_time;
 150             continue;
 151         }
 152
 153         const int64_t actual_delta_ms = current_time - last_time;
 154
 155
 156         while (!game_over_check(game) && SDL_PollEvent(&e)) {
 157             if (game_event(game, &e) < 0) {
 158                 print_current_error_msg("Failed handling event");
 159                 RETURN_LT(lt, -1);
 160             }
 161         }
 162
 163         if (game_input(game, keyboard_state, the_stick_of_joy) < 0) {
 164             print_current_error_msg("Failed handling input");
 165             RETURN_LT(lt, -1);
 166         }
 167
 168         if (game_render(game) < 0) {
 169             print_current_error_msg("Failed rendering the game");
 170             RETURN_LT(lt, -1);
 171         }
 172
 173         int64_t effective_delta_ms = max_int64(actual_delta_ms, expected_delay_ms);
 174         while (effective_delta_ms > 0) {
 175             if (game_update(game, (float) min_int64(expected_delay_ms, effective_delta_ms) * 0.001f) < 0) {
 176                 print_current_error_msg("Failed handling updating");
 177                 RETURN_LT(lt, -1);
 178             }
 179
 180             effective_delta_ms -= expected_delay_ms;
 181         }
 182
 183         if (game_sound(game) < 0) {
 184             print_current_error_msg("Failed handling the sound");
 185             RETURN_LT(lt, -1);
 186         }
 187
 188         SDL_Delay((unsigned int) max_int64(0, expected_delay_ms - actual_delta_ms));
 189         last_time = current_time;
 190     }
 191
 192     RETURN_LT(lt, 0);
 193 }