#include <SFML/Graphics.hpp>
#include <SFML/System.hpp>

int main()
{
	// Create the window
	sf::RenderWindow window(sf::VideoMode(640, 480), "Demo App", sf::Style::Titlebar | sf::Style::Close);

	// Create a simple shape
	sf::RectangleShape rectangle(sf::Vector2f(640,480));
	rectangle.setFillColor(sf::Color::Red); // You will see red if the shader doesn't work

	// Load the shader
	sf::Shader shader;
	shader.loadFromFile("shader.frag", sf::Shader::Fragment);

	while (window.isOpen())
	{
		sf::Event event;
		while (window.pollEvent(event))
		{
			if (event.type == sf::Event::KeyPressed) {
				switch(event.key.code) {
				case sf::Keyboard::Escape:
					window.close();
				default:
					break;
				}
			}

			if (event.type == sf::Event::Closed)
				window.close();
		}

		window.clear();
		window.draw(rectangle, &shader);
		window.display();
	}

	return 0;
}