space_game/src/main.c

#include <SDL2/SDL_mutex.h>
#include <SDL2/SDL_scancode.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <SDL2/SDL.h>
#include <string.h>
#include <time.h>
#include <stdbool.h>

// only for mkdirat lol
#include <fcntl.h> 
#include <sys/stat.h>

#include "logger.h"
#include "game.h" 
#include "draw.h" 
#include "garbo.h" 

const int screen_width = 800;
const int screen_height = 600;

SDL_sem *resume;


struct SDL_Window* make_window(void) {
    if (SDL_Init(SDL_INIT_EVERYTHING) != 0) { 
        printf("error initializing SDL: %s\n", SDL_GetError()); 
    } 


    return SDL_CreateWindow("sdl_tester", 
                                       SDL_WINDOWPOS_CENTERED, 
                                       SDL_WINDOWPOS_CENTERED, 
                                       0, 0, 
                                       SDL_WINDOW_FULLSCREEN_DESKTOP); 
}

void callbackfn(void *unused, Uint8 *stream, int len);
void callbackfn2(void *unused, Uint8 *stream, int len);
void callbackfn3(void *unused, Uint8 *stream, int len);


void start_audio(void) {
    SDL_AudioSpec fmt = {.freq = 8000, .format = AUDIO_U8,.channels = 1, .samples=512};
 
    fmt.callback = callbackfn3;
 
    if (SDL_OpenAudio(&fmt, NULL) < 0) {
        fprintf(stderr, "Unable to open audio: %s\n", SDL_GetError());
        exit(1);
    }
    SDL_PauseAudio(0);
    
}

void stop_audio(void) {
    SDL_CloseAudio();
}

unsigned int func1(int t) {
    int note = 10;
    if (!(t % 8000)) {
        note = (1 + rand()) % 10 + 5;
        printf("%d %d\n", t, note);
    }
    return ((t & 110) % 73 | (t % 1711));
}

unsigned int func0(int t) {
    int note = 18;
    if (t % 1240) {
        note = (1 + rand()) % 18 + 1;
    }

    printf("%d %d\n", t, note);
    fflush(stdout);
    return (t % note);
}


void callbackfn3(void *unused, Uint8 *stream, int len) {
    static int t = 1;
    int i;
    int yeet = rand();
    for(i=0; i < len; i++,t++) {
        stream[i] = func1(t);
    }
}

void callbackfn2(void *unused, Uint8 *stream, int len) {
    static int t = 1;
    int i;
    int yeet = rand();
    for(i=0; i < len; i++,t++) {
        stream[i] = func0(t);
    }
}


void callbackfn(void *unused, Uint8 *stream, int len)
{
    static int t = 0;
    int i;
    int yeet = rand();
    for( i=0; i < len; i++,t++) {
    /*
            stream[i] = (t*5&(t>>7))|(t*3&(t>>8));
    */
    //stream[i] = (( t >> 10 ) & 42) * t;
    stream[i] = (t & yeet) % 73;
    }
}

void redraw(struct SDL_Renderer * ren) {
    SDL_RenderClear(ren);
    redraw_buffer(ren);
    SDL_RenderPresent(ren);
}

int physics_loop(void *ptr) {
    game_paused = 1;
    SDL_Delay(1000);
    game_paused = 0;
    while (1) {
        if (step())  {
            // display end level screen
            game_paused = true;
            SDL_Delay(1000);
            SDL_PauseAudio(1);
            in_game = false;
            SDL_SemWait(resume);
            add_time(level_time);

            SDL_LockMutex(player.physics->lock);
            game_paused = true;
            next_level();
            in_game = true;
            SDL_UnlockMutex(player.physics->lock);
            SDL_Delay(1000);
            game_paused = 0;
            SDL_PauseAudio(0);
        }
    }
}


int game(void) {
    LOGLEVEL = DEBUG;
    STDOUTLEVEL = DEBUG;

    //SDL_SetHint( SDL_HINT_RENDER_SCALE_QUALITY, "2" );

    logwrite(INFO, "Starting\n");
    SDL_Window * win = make_window();
    SDL_Renderer * ren = SDL_CreateRenderer(win, -1, SDL_RENDERER_ACCELERATED);
//            | SDL_RENDERER_PRESENTVSYNC);

    queue_for_cleanup(win, WINDOW);
    queue_for_cleanup(ren, RENDERER);

    in_game = true;
    resume = SDL_CreateSemaphore(0);

  //  IMG_Init(IMG_INIT_PNG | IMG_INIT_JPG);

    if (ren == NULL) {
        SDL_DestroyWindow(win);
        SDL_Quit();
    }

    TTF_Init();

    int close = 0;

    //draw_pictures(ren);
    
    SDL_Thread *physics_thread;
    int ignore;

    startgame(ren);

    physics_thread = SDL_CreateThread(physics_loop, "physics", (void *)ren);

    while (!close)  {

        SDL_Event event; 
        while(SDL_PollEvent(&event))  {
            switch (event.type) {
                case SDL_QUIT:
                    close = 1;
                    return 0;
                case SDL_KEYDOWN:
                    if (event.key.keysym.scancode == SDL_SCANCODE_ESCAPE) {
                        return 0;
                    }
                    if (!SDL_SemValue(resume)) {
                        SDL_SemPost(resume);
                    }
                case SDL_KEYUP:
                case SDL_MOUSEBUTTONDOWN:
                case SDL_MOUSEBUTTONUP:
                    handle_input_event (event);
            }
        }
        /* Redraw Screen */
//        step(10);

        if (!in_game) {
            draw_end_screen(ren);
        } else {
            redraw(ren);
        }
    }
}


int main (int argc, char** argv)  {

    mkdirat(AT_FDCWD, "saves", 0777);

    start_audio();
    game();
    SDL_Quit();
    //empty_cleanup_queue();
    return 0; 
}