Sets the GL viewport based correctly for higher DPI monitors

GLFWGLViewport.java

public class GLFWGLViewport {
  
  public void apply(GLWindow window) {
    
    IntBuffer wbuf = BufferUtils.createIntBuffer(1);
    IntBuffer hbuf = BufferUtils.createIntBuffer(1);
    
    GLFW.glfwGetFramebufferSize(window.getId(), wbuf, hbuf);
    
    int w = wbuf.get(0);
    int h = hbuf.get(0);
    
    GL11.glViewport(0, 0, w, h);
    
  }
  
}