Function tryLoadEdge

examples/shader/Shader.cpp:310–341

}

std::optional<Edge> tryLoadEdge()
{
    // Create the off-screen surface
    sf::RenderTexture surface;
    if (!surface.resize({800, 600}))
        return std::nullopt;

    surface.setSmooth(true);

    // Load the background texture
    sf::Texture backgroundTexture;
    if (!backgroundTexture.loadFromFile("resources/sfml.png"))
        return std::nullopt;

    backgroundTexture.setSmooth(true);

    // Load the entity texture
    sf::Texture entityTexture;
    if (!entityTexture.loadFromFile("resources/devices.png"))
        return std::nullopt;

    entityTexture.setSmooth(true);

    // Load the shader
    sf::Shader shader;
    if (!shader.loadFromFile("resources/edge.frag", sf::Shader::Type::Fragment))
        return std::nullopt;

    shader.setUniform("texture", sf::Shader::CurrentTexture);

    return std::make_optional<Edge>(std::move(surface), std::move(backgroundTexture), std::move(entityTexture), std::move(shader));
}

std::optional<Geometry> tryLoadGeometry()
{