如何在GLUT中获得显示功能？

Question

Is there a GLUT function I can call to get a pointer to the current displayFunc?

EX:

glutDisplayFunc(0xABC);
glutGetDisplayFunc(); // returns 0xABC

Answer 1

No. There is no such function to get the current callback functions such as display functions, as you can see in glut Api documentaion . The glut get functions are meant for state retrieval.