src/main.c

   1 #include <SDL2/SDL.h>
   2 #include <SDL2/SDL_mixer.h>
   3 #include <SDL2/SDL_ttf.h>
   4
   5 #include <stdint.h>
   6 #include <stdio.h>
   7 #include <stdlib.h>
   8 #include <time.h>
   9
  10 #include "game.h"
  11 #include "game/level/platforms.h"
  12 #include "game/level/player.h"
  13 #include "game/sound_samples.h"
  14 #include "math/minmax.h"
  15 #include "math/point.h"
  16 #include "sdl/renderer.h"
  17 #include "system/error.h"
  18 #include "system/lt.h"
  19 #include "system/lt/lt_adapters.h"
  20
  21 #define SCREEN_WIDTH 800
  22 #define SCREEN_HEIGHT 600
  23
  24 static void print_usage(FILE *stream)
  25 {
  26     fprintf(stream, "Usage: nothing [--fps <fps>] <level-file>\n");
  27 }
  28
  29 int main(int argc, char *argv[])
  30 {
  31     srand((unsigned int) time(NULL));
  32
  33     lt_t *const lt = create_lt();
  34
  35     char *level_filename = NULL;
  36     int fps = 60;
  37
  38     for (int i = 1; i < argc;) {
  39         if (strcmp(argv[i], "--fps") == 0) {
  40             if (i + 1 < argc) {
  41                 if (sscanf(argv[i + 1], "%d", &fps) == 0) {
  42                     fprintf(stderr, "Cannot parse FPS: %s is not a number\n", argv[i + 1]);
  43                     print_usage(stderr);
  44                     RETURN_LT(lt, -1);
  45                 }
  46                 i += 2;
  47             } else {
  48                 fprintf(stderr, "Value of FPS is not provided\n");
  49                 print_usage(stderr);
  50                 RETURN_LT(lt, -1);
  51             }
  52         } else {
  53             level_filename = argv[i];
  54             i++;
  55         }
  56     }
  57
  58     if (level_filename == NULL) {
  59         fprintf(stderr, "Path to level file is not provided\n");
  60         print_usage(stderr);
  61         RETURN_LT(lt, -1);
  62     }
  63
  64     if (TTF_Init() < 0) {
  65         print_error_msg(ERROR_TYPE_SDL2_TTF, "Could not initialize SDL_ttf");
  66         RETURN_LT(lt, -1);
  67     }
  68     PUSH_LT(lt, 42, TTF_Quit_lt);
  69
  70     if (SDL_Init(SDL_INIT_EVERYTHING) < 0) {
  71         print_error_msg(ERROR_TYPE_SDL2, "Could not initialize SDL");
  72         RETURN_LT(lt, -1);
  73     }
  74     PUSH_LT(lt, 42, SDL_Quit_lt);
  75
  76     SDL_ShowCursor(SDL_DISABLE);
  77
  78     SDL_Window *const window = PUSH_LT(
  79         lt,
  80         SDL_CreateWindow(
  81             "Nothing",
  82             100, 100,
  83             SCREEN_WIDTH, SCREEN_HEIGHT,
  84             SDL_WINDOW_SHOWN | SDL_WINDOW_RESIZABLE),
  85         SDL_DestroyWindow);
  86
  87     if (window == NULL) {
  88         print_error_msg(ERROR_TYPE_SDL2, "Could not create SDL window");
  89         RETURN_LT(lt, -1);
  90     }
  91
  92     SDL_Renderer *const renderer = PUSH_LT(
  93         lt,
  94         SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC),
  95         SDL_DestroyRenderer);
  96     if (renderer == NULL) {
  97         print_error_msg(ERROR_TYPE_SDL2, "Could not create SDL renderer");
  98         RETURN_LT(lt, -1);
  99     }
 100     if (SDL_SetRenderDrawBlendMode(renderer, SDL_BLENDMODE_BLEND) < 0) {
 101         print_error_msg(ERROR_TYPE_SDL2, "Could not set up blending mode for the renderer");
 102         RETURN_LT(lt, -1);
 103     }
 104
 105     SDL_Joystick *the_stick_of_joy = NULL;
 106
 107     if (SDL_NumJoysticks() > 0) {
 108         the_stick_of_joy = PUSH_LT(lt, SDL_JoystickOpen(0), SDL_JoystickClose);
 109
 110         if (the_stick_of_joy == NULL) {
 111             print_error_msg(ERROR_TYPE_SDL2, "Could not open 0th Stick of the Joy: %s\n");
 112             RETURN_LT(lt, -1);
 113         }
 114
 115         printf("Opened Joystick 0\n");
 116         printf("Name: %s\n", SDL_JoystickNameForIndex(0));
 117         printf("Number of Axes: %d\n", SDL_JoystickNumAxes(the_stick_of_joy));
 118         printf("Number of Buttons: %d\n", SDL_JoystickNumButtons(the_stick_of_joy));
 119         printf("Number of Balls: %d\n", SDL_JoystickNumBalls(the_stick_of_joy));
 120
 121         SDL_JoystickEventState(SDL_ENABLE);
 122     } else {
 123         fprintf(stderr, "[WARNING] Could not find any Sticks of the Joy\n");
 124     }
 125
 126     if (Mix_OpenAudio(
 127             MIX_DEFAULT_FREQUENCY,
 128             MIX_DEFAULT_FORMAT,
 129             2,
 130             1024) < 0) {
 131         print_error_msg(ERROR_TYPE_SDL2_MIXER, "Could not initialize the audio\n");
 132         RETURN_LT(lt, -1);
 133     }
 134     PUSH_LT(lt, 42, Mix_CloseAudio_lt);
 135
 136     // ------------------------------
 137
 138     const char * sound_sample_files[] = {
 139         "./sounds/nothing.wav",
 140         "./sounds/something.wav"
 141     };
 142     const size_t sound_sample_files_count = sizeof(sound_sample_files) / sizeof(char*);
 143
 144     game_t *const game = PUSH_LT(
 145         lt,
 146         create_game(
 147             level_filename,
 148             sound_sample_files,
 149             sound_sample_files_count,
 150             renderer),
 151         destroy_game);
 152     if (game == NULL) {
 153         print_current_error_msg("Could not create the game object");
 154         RETURN_LT(lt, -1);
 155     }
 156
 157     TTF_Font *const font = PUSH_LT(lt, TTF_OpenFont("fonts/UbuntuMono-R.ttf", 24), TTF_CloseFont);
 158     if (font == NULL) {
 159         print_error_msg(ERROR_TYPE_SDL2_TTF, "loading fonts");
 160         RETURN_LT(lt, -1);
 161     }
 162
 163     const Uint8 *const keyboard_state = SDL_GetKeyboardState(NULL);
 164
 165     SDL_Event e;
 166     int64_t last_time = (int64_t) SDL_GetTicks();
 167     const int64_t expected_delay_ms = (int64_t) (1000.0f / (float) fps);
 168     while (!game_over_check(game)) {
 169         const int64_t current_time = (int64_t) SDL_GetTicks();
 170
 171         if (current_time == last_time) {
 172             SDL_Delay((Uint32) expected_delay_ms);
 173             last_time = current_time;
 174             continue;
 175         }
 176
 177         const int64_t actual_delta_ms = current_time - last_time;
 178
 179
 180         while (!game_over_check(game) && SDL_PollEvent(&e)) {
 181             if (game_event(game, &e) < 0) {
 182                 print_current_error_msg("Failed handling event");
 183                 RETURN_LT(lt, -1);
 184             }
 185         }
 186
 187         if (game_input(game, keyboard_state, the_stick_of_joy) < 0) {
 188             print_current_error_msg("Failed handling input");
 189             RETURN_LT(lt, -1);
 190         }
 191
 192         if (game_render(game) < 0) {
 193             print_current_error_msg("Failed rendering the game");
 194             RETURN_LT(lt, -1);
 195         }
 196
 197         SDL_RenderPresent(renderer);
 198
 199         int64_t effective_delta_ms = max_int64(actual_delta_ms, expected_delay_ms);
 200         while (effective_delta_ms > 0) {
 201             if (game_update(game, (float) min_int64(expected_delay_ms, effective_delta_ms) * 0.001f) < 0) {
 202                 print_current_error_msg("Failed handling updating");
 203                 RETURN_LT(lt, -1);
 204             }
 205
 206             effective_delta_ms -= expected_delay_ms;
 207         }
 208
 209         if (game_sound(game) < 0) {
 210             print_current_error_msg("Failed handling the sound");
 211             RETURN_LT(lt, -1);
 212         }
 213
 214         SDL_Delay((unsigned int) max_int64(0, expected_delay_ms - actual_delta_ms));
 215         last_time = current_time;
 216     }
 217
 218     RETURN_LT(lt, 0);
 219 }