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edit approved May 1, 2015 at 11:30

Alex

If I change thread affinity and then create the window used in my OpenGL game it changes the thread affinity to something else. I tracked down the exact API call (ChoosePixelFormatChoosePixelFormat) which changes it by calling setthreadaffinitymasksetThreadAffinityMask after and before all the API calls. Strangely enough it is only the first call to ChoosePixelFormatChoosePixelFormat which exhibits this behaviour. Is this when the OpenGL driver initializes itself and perhaps changes the thread affinity?

Has this been seen by anyone else and is there a reason why it is happening? For what it's worth I have a Radeon 290.

If I change thread affinity and then create the window used in my OpenGL game it changes the thread affinity to something else. I tracked down the exact API call (ChoosePixelFormat) which changes it by calling setthreadaffinitymask after and before all the API calls. Strangely enough it is only the first call to ChoosePixelFormat which exhibits this behaviour. Is this when the OpenGL driver initializes itself and perhaps changes the thread affinity?

Has this been seen by anyone else and is there a reason why it is happening? For what it's worth I have a Radeon 290.

If I change thread affinity and then create the window used in my OpenGL game it changes the thread affinity to something else. I tracked down the exact API call (ChoosePixelFormat) which changes it by calling setThreadAffinityMask after and before all the API calls. Strangely enough it is only the first call to ChoosePixelFormat which exhibits this behaviour. Is this when the OpenGL driver initializes itself and perhaps changes the thread affinity?

Has this been seen by anyone else and is there a reason why it is happening? For what it's worth I have a Radeon 290.

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asked May 1, 2015 at 10:52

Jason Grey

ThreadAffinity being changed by OpenGL / ChoosePixelFormat

If I change thread affinity and then create the window used in my OpenGL game it changes the thread affinity to something else. I tracked down the exact API call (ChoosePixelFormat) which changes it by calling setthreadaffinitymask after and before all the API calls. Strangely enough it is only the first call to ChoosePixelFormat which exhibits this behaviour. Is this when the OpenGL driver initializes itself and perhaps changes the thread affinity?

Has this been seen by anyone else and is there a reason why it is happening? For what it's worth I have a Radeon 290.