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 "game/sprite_font.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 (SDL_Init(SDL_INIT_EVERYTHING) < 0) {
  65         print_error_msg(ERROR_TYPE_SDL2, "Could not initialize SDL");
  66         RETURN_LT(lt, -1);
  67     }
  68     PUSH_LT(lt, 42, SDL_Quit_lt);
  69
  70     SDL_ShowCursor(SDL_DISABLE);
  71
  72     SDL_Window *const window = PUSH_LT(
  73         lt,
  74         SDL_CreateWindow(
  75             "Nothing",
  76             100, 100,
  77             SCREEN_WIDTH, SCREEN_HEIGHT,
  78             SDL_WINDOW_SHOWN | SDL_WINDOW_RESIZABLE),
  79         SDL_DestroyWindow);
  80
  81     if (window == NULL) {
  82         print_error_msg(ERROR_TYPE_SDL2, "Could not create SDL window");
  83         RETURN_LT(lt, -1);
  84     }
  85
  86     SDL_Renderer *const renderer = PUSH_LT(
  87         lt,
  88         SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC),
  89         SDL_DestroyRenderer);
  90     if (renderer == NULL) {
  91         print_error_msg(ERROR_TYPE_SDL2, "Could not create SDL renderer");
  92         RETURN_LT(lt, -1);
  93     }
  94     if (SDL_SetRenderDrawBlendMode(renderer, SDL_BLENDMODE_BLEND) < 0) {
  95         print_error_msg(ERROR_TYPE_SDL2, "Could not set up blending mode for the renderer");
  96         RETURN_LT(lt, -1);
  97     }
  98
  99     SDL_Joystick *the_stick_of_joy = NULL;
 100
 101     if (SDL_NumJoysticks() > 0) {
 102         the_stick_of_joy = PUSH_LT(lt, SDL_JoystickOpen(0), SDL_JoystickClose);
 103
 104         if (the_stick_of_joy == NULL) {
 105             print_error_msg(ERROR_TYPE_SDL2, "Could not open 0th Stick of the Joy: %s\n");
 106             RETURN_LT(lt, -1);
 107         }
 108
 109         printf("Opened Joystick 0\n");
 110         printf("Name: %s\n", SDL_JoystickNameForIndex(0));
 111         printf("Number of Axes: %d\n", SDL_JoystickNumAxes(the_stick_of_joy));
 112         printf("Number of Buttons: %d\n", SDL_JoystickNumButtons(the_stick_of_joy));
 113         printf("Number of Balls: %d\n", SDL_JoystickNumBalls(the_stick_of_joy));
 114
 115         SDL_JoystickEventState(SDL_ENABLE);
 116     } else {
 117         fprintf(stderr, "[WARNING] Could not find any Sticks of the Joy\n");
 118     }
 119
 120     if (Mix_OpenAudio(
 121             MIX_DEFAULT_FREQUENCY,
 122             MIX_DEFAULT_FORMAT,
 123             2,
 124             1024) < 0) {
 125         print_error_msg(ERROR_TYPE_SDL2_MIXER, "Could not initialize the audio\n");
 126         RETURN_LT(lt, -1);
 127     }
 128     PUSH_LT(lt, 42, Mix_CloseAudio_lt);
 129
 130     // ------------------------------
 131
 132     const char * sound_sample_files[] = {
 133         "./sounds/nothing.wav",
 134         "./sounds/something.wav"
 135     };
 136     const size_t sound_sample_files_count = sizeof(sound_sample_files) / sizeof(char*);
 137
 138     game_t *const game = PUSH_LT(
 139         lt,
 140         create_game(
 141             level_filename,
 142             sound_sample_files,
 143             sound_sample_files_count,
 144             renderer),
 145         destroy_game);
 146     if (game == NULL) {
 147         print_current_error_msg("Could not create the game object");
 148         RETURN_LT(lt, -1);
 149     }
 150
 151     sprite_font_t * const sprite_font =
 152         PUSH_LT(lt,
 153                 create_sprite_font_from_file("fonts/charmap-oldschool_white.bmp", renderer),
 154                 destroy_sprite_font);
 155     if (sprite_font == NULL) {
 156         print_current_error_msg("Loading up sprite font");
 157         RETURN_LT(lt, -1);
 158     }
 159
 160     const Uint8 *const keyboard_state = SDL_GetKeyboardState(NULL);
 161
 162     SDL_Event e;
 163     const int64_t delta_time = (int64_t) roundf(1000.0f / 60.0f);
 164     int64_t render_timer = (int64_t) roundf(1000.0f / (float) fps);
 165     while (!game_over_check(game)) {
 166         const int64_t begin_frame_time = (int64_t) SDL_GetTicks();
 167
 168         while (!game_over_check(game) && SDL_PollEvent(&e)) {
 169             if (game_event(game, &e) < 0) {
 170                 print_current_error_msg("Failed handling event");
 171                 RETURN_LT(lt, -1);
 172             }
 173         }
 174
 175         if (game_input(game, keyboard_state, the_stick_of_joy) < 0) {
 176             print_current_error_msg("Failed handling input");
 177             RETURN_LT(lt, -1);
 178         }
 179
 180         if (game_update(game, (float) delta_time * 0.001f) < 0) {
 181             print_current_error_msg("Failed handling updating");
 182             RETURN_LT(lt, -1);
 183         }
 184
 185         if (game_sound(game) < 0) {
 186             print_current_error_msg("Failed handling the sound");
 187             RETURN_LT(lt, -1);
 188         }
 189
 190         if (game_render(game) < 0) {
 191             print_current_error_msg("Failed rendering the game");
 192             RETURN_LT(lt, -1);
 193         }
 194
 195         if (sprite_font_render_text(sprite_font,
 196                                     renderer,
 197                                     vec(0.0f, 0.0f),
 198                                     4,
 199                                     "HELLO, WORLD!!!") < 0) {
 200             print_current_error_msg("Failed rendering debug info");
 201             RETURN_LT(lt, -1);
 202         }
 203
 204         const int64_t end_frame_time = (int64_t) SDL_GetTicks();
 205
 206         render_timer -= delta_time;
 207         if (render_timer <= 0) {
 208             SDL_RenderPresent(renderer);
 209             render_timer = (int64_t) roundf(1000.0f / (float) fps);
 210         }
 211
 212         SDL_Delay((unsigned int) max_int64(10, delta_time - (end_frame_time - begin_frame_time)));
 213     }
 214
 215     RETURN_LT(lt, 0);
 216 }