//Example how to use

int main()
{
    //Window init, API init

    std::unique_ptr<Shader> shader = nullptr;
    switch(api) // it is a value specified wherever you want
    {
        case API::OPENGL: shader = std::make_unique<GLShader>(); break;
        case API::VULCAN: Log("Vulcan Shader unsupported right now!\n); break;
        case API::DIRECTX: Log("DirectX Shader unsupported right now!\n);break;
    }

    void* shaders[] = {
        shader->CreateShader("vertex.shader", Shader::Type::VERTEX),
        shader->CreateShader("fragment.shader", Shader::Type::FRAGMENT),
    };  shader->CreateAndUseProgram(shaders, 2);

    int time = getTicks();
    shader->Uniform1i("time", time);

    //the rest of app, main loop, etc.
}