GLUT in 16-bit RGB?

This is a discussion on GLUT in 16-bit RGB? within the Game Programming forums, part of the General Programming Boards category; I started to really sit down and start studying OpenGL. I love it and questions are already popping up. Is ...

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    GLUT in 16-bit RGB?

    I started to really sit down and start studying OpenGL. I love it and questions are already popping up. Is there a way to tell OpenGL's GLUT to display in 16-bit RGB instead of always GLUT_RGBA? I'm figuring there's a way with glutInitDisplayString(). Thanks in advanced.

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    The Right Honourable psychopath's Avatar
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    Pass GLUT_RGB instead of GLUT_RGBA to glutInitDisplayMode().

    Ex:
    Code:
    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
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    Hmm, cool. I always assumed that was X.8.8.8. Thanks for the help!

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    Supermassive black hole cboard_member's Avatar
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    Yeah. I was going to say pass GLUT_RGB but thought that would be 24bit. Would've made me look quite the fool. Sure side-stepped that landmine !
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    The Right Honourable psychopath's Avatar
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    Eh, actually now that I think about it, GLUT_RGB probably would be 24 bit. I'm not sure if there's a 16 bit flag for GLUT or not. I'll look it up if I have time (at school ATM).
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    There is the following...

    GLUT_RGB assuming X.8.8.8 still alligned to 32-bit
    GLUT_RGBA (A.8.8.8) also 32-bit but with alpha

    I doubt there is a flag for 16-bit (1.5.5.5 or 5.6.5), but glutInitDisplayString() is giving me some hope.

    I have another question related to display modes. How do I query the user's video card to determine if I can use a certain resolution, such as 800x600x32, 640x480x16, and so on? I just hate making blind calls. Do I need to drop into the Win32 API to check on this? Thanks again.
    Last edited by dxfoo; 09-14-2006 at 10:14 AM.

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