#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
#include <SDL.h>
#include <SDL_video.h>
#include <SDL_image.h>
#include <time.h>

int main( int argc, const char* argv[] )
{
    SDL_Window * win;
    SDL_Surface *image;
    Uint32 rmask, gmask, bmask, amask;
    const char name[] = "BLAH";
    if (SDL_Init(SDL_INIT_EVERYTHING) != 0)
    {
        SDL_Log("Unable to initialize SDL: %s", SDL_GetError());
        return 1;
    }

    win = SDL_CreateWindow(name, 0, 0, 500, 300, SDL_WINDOW_RESIZABLE);
    if (win == NULL) {
        // In the case that the window could not be made...
        printf("Could not create window: %s\n", SDL_GetError());
        return 1;
    }

    image = SDL_GetWindowSurface(win);
    printf("Pixel Width: %d, Pixel Heigth: %d\n", image->w, image->h);
  //  image = SDL_ConvertSurfaceFormat(image, SDL_PIXELFORMAT_RGB444, 0);
    //Update the surface
    Uint32 *pixels = (Uint32 *)image->pixels;
    SDL_UpdateWindowSurface( win );

    bool run = true;
    while (run) {
        clock_t start_t, end_t;
        SDL_Event event;
        while (SDL_PollEvent(&event)) {
            /* handle your event here */
            if(event.type == SDL_MOUSEBUTTONDOWN)
            {
                if(event.button.button == SDL_BUTTON_MIDDLE) // scroll up
                {
                    run = false;
                }
                else if(event.button.button == SDL_BUTTON_LEFT) // scroll up
                {
                    //Update the surface
                    SDL_LockSurface(image);
                    for (size_t i = 0; i < (500*300); i++) {
                      pixels[i] += 0xFF;
                    }
                    SDL_UnlockSurface(image);
                    start_t = clock();
                    SDL_UpdateWindowSurface(win);
                    end_t = clock();
                    printf("Time to draw a frame %f \n", ((double)(end_t - start_t)/(double)(CLOCKS_PER_SEC)));
                }
            }
            else if (event.type == SDL_QUIT)
            {
                run = false;
            }

        }
        /* do some other stuff here -- draw your app, etc. */
    }
    SDL_FreeSurface(image);
    SDL_DestroyWindow(win);
    return 0;
}
//g++ main.cpp -o blah `sdl2-config --cflags --libs`