Multiple nanogui::screen

[ashwinbhat]

Hi,
Are multiple screen supported in nanogui? Does this share the underlying OpenGL Context?

[wjakob]

Nobody has ever tried it AFAIK.

[ashwinbhat]

I think I might have a workaround, but it needs making OpenGL calls.

// Create a nanogui screen with OpenGL 4.5
parent = new nanogui::Screen(nanogui::Vector2i(300, 500), 
                                                   "Screen1", 
                                                   true,   
                                                   false,  
                                                   8,      
                                                   8,      
                                                   24,     
                                                   8,      
                                                   4,      
                                                   4,      
                                                   5);     

// Create a new window using a shared context 
// see https://www.glfw.org/docs/3.3/group__window.html#ga3555a418df92ad53f917597fe2f64aeb
GLFWwindow* window = glfwCreateWindow(300, 400, "Screen2", nullptr, parent->glfwWindow());
if (window) {
   // Create a new screen using this window
   // Note: need to call glfwMakeContextCurrent(window) to ensure when we switch between screens
   screen2 = new nanogui::Screen();
   screen2->initialize(window, false);    
}