Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
When running glxinfo, or using my own code (calling glXChooseFBConfig to get a list of GLX framebuffer configurations), I see that there are entries which are identical except for their ID code.
For example:
$ glxinfo
...
0x77 0 tc 0 32 0 r y . 8 8 8 8 4 24 8 16 16 16 16 0 0 None
...
0xae 0 tc 0 32 0 r y . 8 8 8 8 4 24 8 16 16 16 16 0 0 None
...
What is the reason for this duplication? Is there an underlying difference between these seemingly identical modes?
Though they have the same buffer configuration from the point of view of OpenGL, they differ from the point of view of X11. Specifically, they have different X Visual bit-depths (one is a 24-bit X visual and one is a 32-bit X visual)
[note: I found this out while I was composing the question, but since I hadn’t found an answer in my web searches I’m posting the question and answer here anyway — maybe someone else will find it useful in the future.]