Window is rendering Black Screen

SDL Development
1

I was following the lazyfoo tutorial, and when I build the project, I got a black screen instead of white, though in sdl_fillrect we are specifying white color?

#include <SDL.h>
#include <stdio.h>

const int SCREEN_WIDTH = 640;
const int SCREEN_HEIGHT = 480;

int main(int argc, char* args[]) {

	SDL_Window* window = NULL;
	SDL_Surface* screenSurface = NULL;

	if (SDL_Init(SDL_INIT_VIDEO) < 0) {
		printf("An error occured whilie initializing SDL! Error: %s\n", SDL_GetError());
	}
	else {
		window = SDL_CreateWindow("Mytho's Game", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, SCREEN_WIDTH, SCREEN_HEIGHT,SDL_WINDOW_SHOWN);

		if (window == NULL) {
			printf("Window could'nt be created! Eroor: %s\n", SDL_GetError());
		}
		else {
			screenSurface = SDL_GetWindowSurface(window);

			SDL_FillRect(screenSurface, NULL, SDL_MapRGB(screenSurface->format, 0xFF, 0xFF, 0xFF));

			SDL_Event event;
			bool quit = false;

			while (!quit){
				while (SDL_PollEvent(&event)) {
					if (event.type == SDL_QUIT) {
						quit = true;
					}
				}
			}

			SDL_DestroyWindow(window);

			SDL_Quit();

			return 0;

		}
	}
}
2

You forgot to call SDL_UpdateWindowSurface.

SDL_UpdateWindowSurface(window);
1 Like
3

Thankyou I don’t know why I forgot to call it :sweat_smile: