//2011-0301
//#include <string.h>
#include <SDL2/SDL.h>

//const int SCREEN_WIDTH = 1280;
//const int SCREEN_HEIGHT = 720;
#define SCREEN_WIDTH 1280
#define SCREEN_HEIGHT 720

int main(int argc, char **argv) {
    bool quit = false;

    if(SDL_Init(SDL_INIT_VIDEO | SDL_INIT_JOYSTICK) < 0) {
        printf("SDL init failed: %s\n", SDL_GetError());
        return 1;
    }

    SDL_Window* window = SDL_CreateWindow(NULL, SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED, SCREEN_WIDTH, SCREEN_HEIGHT, SDL_WINDOW_SHOWN);
    SDL_Renderer * renderer = SDL_CreateRenderer(window, -1, SDL_RENDERER_SOFTWARE);
    SDL_Texture * texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_RGBA8888, SDL_TEXTUREACCESS_STATIC, SCREEN_WIDTH, SCREEN_HEIGHT);
    Uint32 pixels[SCREEN_WIDTH * SCREEN_HEIGHT];
    memset(pixels, 255, SCREEN_WIDTH * SCREEN_HEIGHT * 4);

    int j;
    for (j = 0; j < SDL_NumJoysticks(); j++) {
        if (SDL_JoystickOpen(j) == NULL) {
            printf("SDL_JoystickOpen: %s\n", SDL_GetError());
            SDL_Quit();
            return 1;
        }
    }

    while (!quit) {
        SDL_UpdateTexture(texture, NULL, pixels, SCREEN_WIDTH * 4);

        SDL_Event event;
        while (SDL_PollEvent(&event)) {
            //printf("event.type=%d; fingerdown=%d; fingermotion=%d", event.type, SDL_FINGERDOWN, SDL_FINGERMOTION);
            if (event.type == SDL_FINGERDOWN || event.type == SDL_FINGERMOTION) {
                int touchX = event.tfinger.x * SCREEN_WIDTH;
                int touchY = event.tfinger.y * SCREEN_HEIGHT;
                pixels[touchY * SCREEN_WIDTH + touchX] = 0;
            } else if (event.type == SDL_JOYBUTTONDOWN) {
                if(event.jbutton.button == SDL_CONTROLLER_BUTTON_RIGHTSHOULDER)
                    quit = true;
            }
        }

        SDL_RenderClear(renderer);
        SDL_RenderCopy(renderer, texture, NULL, NULL);
        SDL_RenderPresent(renderer);
        //SDL_Delay(25);
    }

    //delete[] pixels;
    SDL_DestroyTexture(texture);
    SDL_DestroyRenderer(renderer);
    SDL_DestroyWindow(window);
    SDL_Quit();

    return 0;
}