src/main.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <SDL2/SDL.h>
   4
   5 #include "./player.h"
   6 #include "./platforms.h"
   7 #include "./error.h"
   8 #include "./game.h"
   9 #include "./lt.h"
  10
  11 #define SCREEN_WIDTH 800
  12 #define SCREEN_HEIGHT 600
  13 #define GAME_FPS 60
  14
  15 /* LT module adapter for SDL_Quit */
  16 static void SDL_Quit_lt(void* ignored)
  17 {
  18     (void) ignored;
  19     SDL_Quit();
  20 }
  21
  22 static void print_usage(FILE *stream)
  23 {
  24     fprintf(stream, "Usage: nothing <level-file>\n");
  25 }
  26
  27 int main(int argc, char *argv[])
  28 {
  29     lt_t *const lt = create_lt();
  30
  31     if (argc < 2) {
  32         print_usage(stderr);
  33         RETURN_LT(lt, -1);
  34     }
  35
  36     if (SDL_Init(SDL_INIT_EVERYTHING) < 0) {
  37         print_error_msg(ERROR_TYPE_SDL2, "Could not initialize SDL");
  38         RETURN_LT(lt, -1);
  39     }
  40     PUSH_LT(lt, 42, SDL_Quit_lt);
  41
  42     SDL_Window *const window = PUSH_LT(
  43         lt,
  44         SDL_CreateWindow("Nothing", 100, 100, SCREEN_WIDTH, SCREEN_HEIGHT, SDL_WINDOW_SHOWN),
  45         SDL_DestroyWindow);
  46
  47     if (window == NULL) {
  48         print_error_msg(ERROR_TYPE_SDL2, "Could not create SDL window");
  49         RETURN_LT(lt, -1);
  50     }
  51
  52     SDL_Renderer *const renderer = PUSH_LT(
  53         lt,
  54         SDL_CreateRenderer(window, -1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC),
  55         SDL_DestroyRenderer);
  56     if (renderer == NULL) {
  57         print_error_msg(ERROR_TYPE_SDL2, "Could not create SDL renderer");
  58         RETURN_LT(lt, -1);
  59     }
  60     if (SDL_SetRenderDrawBlendMode(renderer, SDL_BLENDMODE_BLEND) < 0) {
  61         print_error_msg(ERROR_TYPE_SDL2, "Could not set up blending mode for the renderer");
  62         RETURN_LT(lt, -1);
  63     }
  64
  65     SDL_Joystick *the_stick_of_joy = NULL;
  66
  67     if (SDL_NumJoysticks() > 0) {
  68         the_stick_of_joy = PUSH_LT(lt, SDL_JoystickOpen(0), SDL_JoystickClose);
  69
  70         if (the_stick_of_joy == NULL) {
  71             print_error_msg(ERROR_TYPE_SDL2, "Could not open 0th Stick of the Joy: %s\n");
  72             RETURN_LT(lt, -1);
  73         }
  74
  75         printf("Opened Joystick 0\n");
  76         printf("Name: %s\n", SDL_JoystickNameForIndex(0));
  77         printf("Number of Axes: %d\n", SDL_JoystickNumAxes(the_stick_of_joy));
  78         printf("Number of Buttons: %d\n", SDL_JoystickNumButtons(the_stick_of_joy));
  79         printf("Number of Balls: %d\n", SDL_JoystickNumBalls(the_stick_of_joy));
  80
  81         SDL_JoystickEventState(SDL_ENABLE);
  82     } else {
  83         fprintf(stderr, "[WARNING] Could not find any Sticks of the Joy\n");
  84     }
  85
  86     // ------------------------------
  87
  88     game_t *const game = PUSH_LT(lt, create_game(argv[1]), destroy_game);
  89     if (game == NULL) {
  90         print_current_error_msg("Could not create the game object");
  91         RETURN_LT(lt, -1);
  92     }
  93
  94     const Uint8 *const keyboard_state = SDL_GetKeyboardState(NULL);
  95     const Uint32 delay_ms = (Uint32) roundf(1000.0f / GAME_FPS);
  96     SDL_Event e;
  97     while (!game_over_check(game)) {
  98         while (!game_over_check(game) && SDL_PollEvent(&e)) {
  99             if (game_event(game, &e) < 0) {
 100                 print_current_error_msg("Failed handling event");
 101                 RETURN_LT(lt, -1);
 102             }
 103         }
 104
 105         if (game_input(game, keyboard_state, the_stick_of_joy) < 0) {
 106             print_current_error_msg("Failed handling input");
 107             RETURN_LT(lt, -1);
 108         }
 109
 110         if (game_update(game, delay_ms) < 0) {
 111             print_current_error_msg("Failed handling updating");
 112             RETURN_LT(lt, -1);
 113         }
 114
 115         if (game_render(game, renderer) < 0) {
 116             print_current_error_msg("Failed rendering the game");
 117             RETURN_LT(lt, -1);
 118         }
 119     }
 120
 121     RETURN_LT(lt, 0);
 122 }