Function main

examples/shader/Shader.cpp:378–519

/////////////////////////////////////////////////////// Entry point of application \return Application exit code ///////////////////////////////////////////////////////

///
////////////////////////////////////////////////////////////
int main()
{
    // Exit early if shaders are not available
    if (!sf::Shader::isAvailable())
    {
        std::cerr << "Shaders not supported on current system, aborting" << std::endl;
        return EXIT_FAILURE;
    }

    // Create the main window
    sf::RenderWindow window(sf::VideoMode({800, 600}), "SFML Shader", sf::Style::Titlebar | sf::Style::Close);
    window.setVerticalSyncEnabled(true);

    // Open the application font
    const sf::Font font("resources/tuffy.ttf");

    // Create the effects
    std::optional pixelateEffect   = tryLoadPixelate();
    std::optional waveBlurEffect   = tryLoadWaveBlur(font);
    std::optional stormBlinkEffect = tryLoadStormBlink();
    std::optional edgeEffect       = tryLoadEdge();
    std::optional geometryEffect   = tryLoadGeometry();

    const auto optionalToPtr = [](auto& effect) -> Effect* { return effect.has_value() ? &*effect : nullptr; };

    const std::array<Effect*, 5> effects{optionalToPtr(pixelateEffect),
                                         optionalToPtr(waveBlurEffect),
                                         optionalToPtr(stormBlinkEffect),
                                         optionalToPtr(edgeEffect),
                                         optionalToPtr(geometryEffect)};

    const std::array<std::string, 5>
        effectNames{"Pixelate", "Wave + Blur", "Storm + Blink", "Edge Post-effect", "Geometry Shader Billboards"};

    // Index of currently selected effect
    std::size_t current = 0;

    // Create the messages background
    const sf::Texture textBackgroundTexture("resources/text-background.png");
    sf::Sprite        textBackground(textBackgroundTexture);
    textBackground.setPosition({0.f, 520.f});
    textBackground.setColor(sf::Color(255, 255, 255, 200));

    // Create the description text
    sf::Text description(font, "Current effect: " + effectNames[current], 20);
    description.setPosition({10.f, 530.f});
    description.setFillColor(sf::Color(80, 80, 80));

    // Create the instructions text
    sf::Text instructions(font, "Press left and right arrows to change the current shader", 20);
    instructions.setPosition({280.f, 555.f});
    instructions.setFillColor(sf::Color(80, 80, 80));

    // Start the game loop
    const sf::Clock clock;
    while (window.isOpen())
    {
        // Process events