#include <SDL.h>
#include <SDL_image.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdint.h>
#include <errno.h>
#include <string.h>
#include "kiss.h"

char *title = "SDL 07 - Texture Loading and Rendering";
SDL_Window *window;
SDL_Renderer *renderer;
SDL_Texture *texture;

int
init_sdl(void)
{
   int status = -1;
   int x = SDL_WINDOWPOS_UNDEFINED;
   int y = SDL_WINDOWPOS_UNDEFINED;
   int width = 800;
   int height = 366;
   int flags = 0;       // SDL_WINDOW_FULLSCREEN_DESKTOP

   SDL_INIT(SDL_INIT_VIDEO);
   IMG_INIT(IMG_INIT_PNG);
   window = SDL_CREATEWINDOW(title, x, y, width, height, flags);
   renderer = SDL_CREATERENDERER(window, -1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC);
   SDL_SetRenderDrawColor(renderer, 0xFF, 0x7F, 0x3F, 0xFF);
   status = 0;
error:
   return status;
}

#define INIT_SDL(...) SDL_ZERO(init_sdl, __VA_ARGS__)

void
close_sdl(void)
{
   SDL_DestroyRenderer(renderer);
   SDL_DestroyWindow(window);
   IMG_Quit();
   SDL_Quit();
}

int a = 0;

int
draw(void)
{
   int status = -1;
   int w, h;
   SDL_GetWindowSize(window, &w, &h);
   SDL_RENDERCLEAR(renderer);
//	SDL_RENDERCOPY(renderer, texture, NULL, NULL);
   SDL_RENDERCOPYEX(renderer, texture, NULL, NULL, a, NULL, 0);
   SDL_RenderPresent(renderer);
   status = 0;
error:
   return status;
}

#define DRAW(...) SDL_ZERO(draw, __VA_ARGS__)

SDL_Texture *
load_texture(char *path)
{
   SDL_Texture *texture = NULL;
   SDL_Surface *surface = NULL;
   surface = IMG_LOAD(path);
   texture = SDL_CREATETEXTUREFROMSURFACE(renderer, surface);
error:
   SDL_FreeSurface(surface);
   return texture;
}

#define LOAD_TEXTURE(...) SDL_CHK(load_texture, __VA_ARGS__)

int
main(void)
{
   int exit_status = EXIT_FAILURE;
   bool quit = 0;
   SDL_Event e;

   INIT_SDL();

   texture = LOAD_TEXTURE("logo.png");

   while (!quit)
     {
        if (SDL_PollEvent(&e))
          {
             if (e.type == SDL_QUIT)
               quit = 1;
          }
        DRAW();
//		SDL_Delay(1000/60);
        a += 1;
     }

   exit_status = EXIT_SUCCESS;
error:
   SDL_DestroyTexture(texture);
   close_sdl();
   exit(exit_status);
}