/* mention the SDL2 documentation at http://wiki.libsdl.org/APIByCategory */


#include <SDL2/SDL.h>
#include <stdbool.h>


void gui_run(void) {

	bool quit = false;
	SDL_Event event;
	SDL_Window* window;
	SDL_Renderer* renderer;
	SDL_Texture* texture;
	uint32_t* pixels;

	// init SDL2 and create window
	SDL_Init(SDL_INIT_VIDEO);
	window = SDL_CreateWindow("LimoX",
	    SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, 640, 480,
	    0
	);

	// output video driver to stderr
	fprintf(stderr, "SDL2 video driver: %s\n", SDL_GetCurrentVideoDriver());

	// create and initialize renderer, texture and pixel buffer
	renderer = SDL_CreateRenderer(window, -1, 0);
	texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_ARGB8888,
	                            SDL_TEXTUREACCESS_STATIC, 640, 480);
	pixels = malloc(sizeof(uint32_t) * 640 * 480);
	memset(pixels, 255, 640 * 480 * sizeof(uint32_t));

	// handle failed window creation
	if (window == NULL) {
		fprintf(stderr, "Failed to create SDL2 window!\n");
		return;
	} else {
		while (!quit) {
			SDL_UpdateTexture(texture, NULL, pixels, 640 * sizeof(uint32_t));
			SDL_WaitEvent(&event);
			switch (event.type)
			{
				case SDL_QUIT:
					quit = true;
					break;
			}
			SDL_RenderClear(renderer);
			SDL_RenderCopy(renderer, texture, NULL, NULL);
			SDL_RenderPresent(renderer);
		}
		SDL_DestroyWindow(window);
	}

	free(pixels);

	// TODO this seems to end in memory access errors but ... why?
	//SDL_DestroyTexture(texture);
	//SDL_DestroyRenderer(renderer);

	SDL_Quit();

}