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 #include "system/lt/lt_adapters.h"
  18
  19 #define SCREEN_WIDTH 800
  20 #define SCREEN_HEIGHT 600
  21
  22 static void print_usage(FILE *stream)
  23 {
  24     fprintf(stream, "Usage: nothing [--fps <fps>] <level-file>\n");
  25 }
  26
  27 int main(int argc, char *argv[])
  28 {
  29     srand((unsigned int) time(NULL));
  30
  31     lt_t *const lt = create_lt();
  32
  33     char *level_filename = NULL;
  34     int fps = 60;
  35
  36     for (int i = 1; i < argc;) {
  37         if (strcmp(argv[i], "--fps") == 0) {
  38             if (i + 1 < argc) {
  39                 if (sscanf(argv[i + 1], "%d", &fps) == 0) {
  40                     fprintf(stderr, "Cannot parse FPS: %s is not a number\n", argv[i + 1]);
  41                     print_usage(stderr);
  42                     RETURN_LT(lt, -1);
  43                 }
  44                 i += 2;
  45             } else {
  46                 fprintf(stderr, "Value of FPS is not provided\n");
  47                 print_usage(stderr);
  48                 RETURN_LT(lt, -1);
  49             }
  50         } else {
  51             level_filename = argv[i];
  52             i++;
  53         }
  54     }
  55
  56     if (level_filename == NULL) {
  57         fprintf(stderr, "Path to level file is not provided\n");
  58         print_usage(stderr);
  59         RETURN_LT(lt, -1);
  60     }
  61
  62     if (SDL_Init(SDL_INIT_EVERYTHING) < 0) {
  63         print_error_msg(ERROR_TYPE_SDL2, "Could not initialize SDL");
  64         RETURN_LT(lt, -1);
  65     }
  66     PUSH_LT(lt, 42, SDL_Quit_lt);
  67
  68     SDL_ShowCursor(SDL_DISABLE);
  69
  70     SDL_Window *const window = PUSH_LT(
  71         lt,
  72         SDL_CreateWindow(
  73             "Nothing",
  74             100, 100,
  75             SCREEN_WIDTH, SCREEN_HEIGHT,
  76             SDL_WINDOW_SHOWN | SDL_WINDOW_RESIZABLE),
  77         SDL_DestroyWindow);
  78
  79     if (window == NULL) {
  80         print_error_msg(ERROR_TYPE_SDL2, "Could not create SDL window");
  81         RETURN_LT(lt, -1);
  82     }
  83
  84     SDL_Renderer *const renderer = PUSH_LT(
  85         lt,
  86         SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC),
  87         SDL_DestroyRenderer);
  88     if (renderer == NULL) {
  89         print_error_msg(ERROR_TYPE_SDL2, "Could not create SDL renderer");
  90         RETURN_LT(lt, -1);
  91     }
  92     if (SDL_SetRenderDrawBlendMode(renderer, SDL_BLENDMODE_BLEND) < 0) {
  93         print_error_msg(ERROR_TYPE_SDL2, "Could not set up blending mode for the renderer");
  94         RETURN_LT(lt, -1);
  95     }
  96
  97     SDL_Joystick *the_stick_of_joy = NULL;
  98
  99     if (SDL_NumJoysticks() > 0) {
 100         the_stick_of_joy = PUSH_LT(lt, SDL_JoystickOpen(0), SDL_JoystickClose);
 101
 102         if (the_stick_of_joy == NULL) {
 103             print_error_msg(ERROR_TYPE_SDL2, "Could not open 0th Stick of the Joy: %s\n");
 104             RETURN_LT(lt, -1);
 105         }
 106
 107         printf("Opened Joystick 0\n");
 108         printf("Name: %s\n", SDL_JoystickNameForIndex(0));
 109         printf("Number of Axes: %d\n", SDL_JoystickNumAxes(the_stick_of_joy));
 110         printf("Number of Buttons: %d\n", SDL_JoystickNumButtons(the_stick_of_joy));
 111         printf("Number of Balls: %d\n", SDL_JoystickNumBalls(the_stick_of_joy));
 112
 113         SDL_JoystickEventState(SDL_ENABLE);
 114     } else {
 115         fprintf(stderr, "[WARNING] Could not find any Sticks of the Joy\n");
 116     }
 117
 118     if (Mix_OpenAudio(
 119             MIX_DEFAULT_FREQUENCY,
 120             MIX_DEFAULT_FORMAT,
 121             2,
 122             1024) < 0) {
 123         print_error_msg(ERROR_TYPE_SDL2_MIXER, "Could not initialize the audio\n");
 124         RETURN_LT(lt, -1);
 125     }
 126     PUSH_LT(lt, 42, Mix_CloseAudio_lt);
 127
 128     // ------------------------------
 129
 130     const char * sound_sample_files[] = {
 131         "./sounds/nothing.wav",
 132         "./sounds/something.wav"
 133     };
 134     const size_t sound_sample_files_count = sizeof(sound_sample_files) / sizeof(char*);
 135
 136     game_t *const game = PUSH_LT(
 137         lt,
 138         create_game(
 139             level_filename,
 140             sound_sample_files,
 141             sound_sample_files_count,
 142             renderer),
 143         destroy_game);
 144     if (game == NULL) {
 145         print_current_error_msg("Could not create the game object");
 146         RETURN_LT(lt, -1);
 147     }
 148
 149     const Uint8 *const keyboard_state = SDL_GetKeyboardState(NULL);
 150
 151     SDL_Event e;
 152     int64_t last_time = (int64_t) SDL_GetTicks();
 153     const int64_t expected_delay_ms = (int64_t) (1000.0f / (float) fps);
 154     while (!game_over_check(game)) {
 155         const int64_t current_time = (int64_t) SDL_GetTicks();
 156
 157         if (current_time == last_time) {
 158             SDL_Delay((Uint32) expected_delay_ms);
 159             last_time = current_time;
 160             continue;
 161         }
 162
 163         const int64_t actual_delta_ms = current_time - last_time;
 164
 165
 166         while (!game_over_check(game) && SDL_PollEvent(&e)) {
 167             if (game_event(game, &e) < 0) {
 168                 print_current_error_msg("Failed handling event");
 169                 RETURN_LT(lt, -1);
 170             }
 171         }
 172
 173         if (game_input(game, keyboard_state, the_stick_of_joy) < 0) {
 174             print_current_error_msg("Failed handling input");
 175             RETURN_LT(lt, -1);
 176         }
 177
 178         if (game_render(game) < 0) {
 179             print_current_error_msg("Failed rendering the game");
 180             RETURN_LT(lt, -1);
 181         }
 182
 183         int64_t effective_delta_ms = max_int64(actual_delta_ms, expected_delay_ms);
 184         while (effective_delta_ms > 0) {
 185             if (game_update(game, (float) min_int64(expected_delay_ms, effective_delta_ms) * 0.001f) < 0) {
 186                 print_current_error_msg("Failed handling updating");
 187                 RETURN_LT(lt, -1);
 188             }
 189
 190             effective_delta_ms -= expected_delay_ms;
 191         }
 192
 193         if (game_sound(game) < 0) {
 194             print_current_error_msg("Failed handling the sound");
 195             RETURN_LT(lt, -1);
 196         }
 197
 198         SDL_Delay((unsigned int) max_int64(0, expected_delay_ms - actual_delta_ms));
 199         last_time = current_time;
 200     }
 201
 202     RETURN_LT(lt, 0);
 203 }