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/point.h"
  15 #include "sdl/renderer.h"
  16 #include "system/error.h"
  17 #include "system/lt.h"
  18 #include "system/lt/lt_adapters.h"
  19
  20 #define SCREEN_WIDTH 800
  21 #define SCREEN_HEIGHT 600
  22
  23 static void print_usage(FILE *stream)
  24 {
  25     fprintf(stream, "Usage: nothing [--fps <fps>] <level-file>\n");
  26 }
  27
  28 int main(int argc, char *argv[])
  29 {
  30     srand((unsigned int) time(NULL));
  31
  32     Lt *const lt = create_lt();
  33
  34     char *level_filename = NULL;
  35     int fps = 30;
  36
  37     for (int i = 1; i < argc;) {
  38         if (strcmp(argv[i], "--fps") == 0) {
  39             if (i + 1 < argc) {
  40                 if (sscanf(argv[i + 1], "%d", &fps) == 0) {
  41                     fprintf(stderr, "Cannot parse FPS: %s is not a number\n", argv[i + 1]);
  42                     print_usage(stderr);
  43                     RETURN_LT(lt, -1);
  44                 }
  45                 i += 2;
  46             } else {
  47                 fprintf(stderr, "Value of FPS is not provided\n");
  48                 print_usage(stderr);
  49                 RETURN_LT(lt, -1);
  50             }
  51         } else {
  52             level_filename = argv[i];
  53             i++;
  54         }
  55     }
  56
  57     if (level_filename == NULL) {
  58         fprintf(stderr, "Path to level file is not provided\n");
  59         print_usage(stderr);
  60         RETURN_LT(lt, -1);
  61     }
  62
  63     if (SDL_Init(SDL_INIT_EVERYTHING) < 0) {
  64         print_error_msg(ERROR_TYPE_SDL2, "Could not initialize SDL");
  65         RETURN_LT(lt, -1);
  66     }
  67     PUSH_LT(lt, 42, SDL_Quit_lt);
  68
  69     SDL_ShowCursor(SDL_DISABLE);
  70
  71     SDL_Window *const window = PUSH_LT(
  72         lt,
  73         SDL_CreateWindow(
  74             "Nothing",
  75             100, 100,
  76             SCREEN_WIDTH, SCREEN_HEIGHT,
  77             SDL_WINDOW_SHOWN | SDL_WINDOW_RESIZABLE),
  78         SDL_DestroyWindow);
  79
  80     if (window == NULL) {
  81         print_error_msg(ERROR_TYPE_SDL2, "Could not create SDL window");
  82         RETURN_LT(lt, -1);
  83     }
  84
  85     SDL_Renderer *const renderer = PUSH_LT(
  86         lt,
  87         SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC),
  88         SDL_DestroyRenderer);
  89     if (renderer == NULL) {
  90         print_error_msg(ERROR_TYPE_SDL2, "Could not create SDL renderer");
  91         RETURN_LT(lt, -1);
  92     }
  93     if (SDL_SetRenderDrawBlendMode(renderer, SDL_BLENDMODE_BLEND) < 0) {
  94         print_error_msg(ERROR_TYPE_SDL2, "Could not set up blending mode for the renderer");
  95         RETURN_LT(lt, -1);
  96     }
  97
  98     SDL_Joystick *the_stick_of_joy = NULL;
  99
 100     if (SDL_NumJoysticks() > 0) {
 101         the_stick_of_joy = PUSH_LT(lt, SDL_JoystickOpen(0), SDL_JoystickClose);
 102
 103         if (the_stick_of_joy == NULL) {
 104             print_error_msg(ERROR_TYPE_SDL2, "Could not open 0th Stick of the Joy: %s\n");
 105             RETURN_LT(lt, -1);
 106         }
 107
 108         printf("Opened Joystick 0\n");
 109         printf("Name: %s\n", SDL_JoystickNameForIndex(0));
 110         printf("Number of Axes: %d\n", SDL_JoystickNumAxes(the_stick_of_joy));
 111         printf("Number of Buttons: %d\n", SDL_JoystickNumButtons(the_stick_of_joy));
 112         printf("Number of Balls: %d\n", SDL_JoystickNumBalls(the_stick_of_joy));
 113
 114         SDL_JoystickEventState(SDL_ENABLE);
 115     } else {
 116         fprintf(stderr, "[WARNING] Could not find any Sticks of the Joy\n");
 117     }
 118
 119     if (Mix_OpenAudio(
 120             MIX_DEFAULT_FREQUENCY,
 121             MIX_DEFAULT_FORMAT,
 122             2,
 123             1024) < 0) {
 124         print_error_msg(ERROR_TYPE_SDL2_MIXER, "Could not initialize the audio\n");
 125         RETURN_LT(lt, -1);
 126     }
 127     PUSH_LT(lt, 42, Mix_CloseAudio_lt);
 128
 129     // ------------------------------
 130
 131     const char * sound_sample_files[] = {
 132         "./sounds/nothing.wav",
 133         "./sounds/something.wav"
 134     };
 135     const size_t sound_sample_files_count = sizeof(sound_sample_files) / sizeof(char*);
 136
 137     Game *const game = PUSH_LT(
 138         lt,
 139         create_game(
 140             level_filename,
 141             sound_sample_files,
 142             sound_sample_files_count,
 143             renderer),
 144         destroy_game);
 145     if (game == NULL) {
 146         print_current_error_msg("Could not create the game object");
 147         RETURN_LT(lt, -1);
 148     }
 149
 150     const Uint8 *const keyboard_state = SDL_GetKeyboardState(NULL);
 151
 152     SDL_StartTextInput();
 153     SDL_Event e;
 154     const int64_t delta_time = (int64_t) roundf(1000.0f / 60.0f);
 155     int64_t render_timer = (int64_t) roundf(1000.0f / (float) fps);
 156     while (!game_over_check(game)) {
 157         const int64_t begin_frame_time = (int64_t) SDL_GetTicks();
 158
 159         while (!game_over_check(game) && SDL_PollEvent(&e)) {
 160             if (game_event(game, &e) < 0) {
 161                 print_current_error_msg("Failed handling event");
 162                 RETURN_LT(lt, -1);
 163             }
 164         }
 165
 166         if (game_input(game, keyboard_state, the_stick_of_joy) < 0) {
 167             print_current_error_msg("Failed handling input");
 168             RETURN_LT(lt, -1);
 169         }
 170
 171         if (game_update(game, (float) delta_time * 0.001f) < 0) {
 172             print_current_error_msg("Failed handling updating");
 173             RETURN_LT(lt, -1);
 174         }
 175
 176         if (game_sound(game) < 0) {
 177             print_current_error_msg("Failed handling the sound");
 178             RETURN_LT(lt, -1);
 179         }
 180
 181         render_timer -= delta_time;
 182         if (render_timer <= 0) {
 183             if (game_render(game) < 0) {
 184                 print_current_error_msg("Failed rendering the game");
 185                 RETURN_LT(lt, -1);
 186             }
 187             SDL_RenderPresent(renderer);
 188             render_timer = (int64_t) roundf(1000.0f / (float) fps);
 189         }
 190
 191         const int64_t end_frame_time = (int64_t) SDL_GetTicks();
 192 #define max_int64(a, b) (a > b ? a : b)
 193         SDL_Delay((unsigned int) max_int64(10, delta_time - (end_frame_time - begin_frame_time)));
 194 #undef max_int64
 195     }
 196
 197     RETURN_LT(lt, 0);
 198 }