lemur/game.c

#include <assets.h>
#include <game.h>
#include <SDL2/SDL.h>
#include <time.h>

int sleepNanos(long int ns) {
    struct timespec time;
    time.tv_sec = ns / 1000000000;
    time.tv_nsec = ns % 1000000000;
    return nanosleep(&time, NULL);
}

#define MAX_STEP_CLOCKS 20000

int runGame(VB *sim, GraphicsContext *gfx) {
    uint32_t clocks;
    SDL_Event event;

    gfxUpdateLeftEye(gfx, LEFT_EYE_DEFAULT);
    gfxUpdateRightEye(gfx, RIGHT_EYE_DEFAULT);

    while (1) {
        clocks = MAX_STEP_CLOCKS;
        vbEmulate(sim, &clocks);
        gfxRender(gfx);
        while (SDL_PollEvent(&event)) {
            if (event.type == SDL_QUIT) {
                return 0;
            }
        }
        sleepNanos((MAX_STEP_CLOCKS - clocks) * 50);
    }
}