#include <SDL.h>

SDL_Window*     window;
SDL_Renderer*   renderer;
SDL_Surface*    surface;
SDL_Texture*    texture;

const int screenWidth = 800;
const int screenHeight = 600;

int throw_sdl_err(const char* fmt)
{
  SDL_LogError(
    SDL_LOG_CATEGORY_APPLICATION,
    fmt,
    SDL_GetError()
  );
  return 3;
}

int initWindow(void){
  if (SDL_Init(SDL_INIT_VIDEO) < 0) {
    return throw_sdl_err("Could not init the SDL: %s");
  }
  if (SDL_CreateWindowAndRenderer(screenWidth, screenHeight, SDL_WINDOW_OPENGL, &window, &renderer)) {
    return throw_sdl_err("Could not create new window and renderer: %s");
  }
  return 0;
}

int loadLogo(void){
  surface = SDL_LoadBMP("imgs/bocm.bmp");
  if (!surface) {
    return throw_sdl_err("Could not load BMP image: %s");
  }
  texture = SDL_CreateTextureFromSurface(renderer, surface);
  if (!texture) {
    return throw_sdl_err("Could not create new texture from surface: %s");
  }
  SDL_FreeSurface(surface);
  return 0;
}

int loadBackgroundColor(void){
  SDL_SetRenderDrawColor(renderer, 255, 0, 0, 255);
  SDL_RenderClear(renderer);
  return 0;
}

int locLogo(void){
  SDL_Rect srcrect = {0, 0, 100, 73};
  SDL_Rect dstrect = {10, 10, 100, 73};
  SDL_RenderCopy(renderer, texture, &srcrect, &dstrect);
  return 0;
}

int locStars(void){
  SDL_Rect srcrect = {1, 32, 22, 21};
  SDL_Rect dstrect = {100, 100, 22, 21};
  SDL_RenderCopy(renderer, texture, &srcrect, &dstrect);
  return 0;
}

int destroy(void){
  SDL_DestroyTexture(texture);
  SDL_DestroyRenderer(renderer);
  SDL_DestroyWindow(window);
  SDL_Quit();
  return 0;
}