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[Bug 421651] Re: Using glutCreateWindow() seeds RNG with predictable value

 

Thank you for including a test program that demonstrates the problem.

I think the bug probably is in the intel specific part of mesa. Using your program I traced the glutCreateWindow call and added lines like
    printf("Random number 11 (fgOpenWindow): %i\n",rand());
in relevant places in the source code of the freeglut source package. glutCreateWindow (in src/freeglut_window.c) calls fgCreateWindow (in src/freeglut_structure.c) which calls fgOpenWindow (in src/freeglut_window.c) which again calls glXMakeCurrent like this:

    glXMakeCurrent(
        fgDisplay.Display,
        window->Window.Handle,
        window->Window.Context
    );

Before the glXMakeCurrent call, rand() returns a random number, while
after the call it returns the same every time.


** Changed in: mesa (Ubuntu)
       Status: New => Triaged

** Changed in: mesa (Ubuntu)
   Importance: Undecided => Low

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Using glutCreateWindow() seeds RNG with predictable value
https://bugs.launchpad.net/bugs/421651
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