[Bug 9378] Combat Mission Shock Force DEMO: 'Could not initialize OpenGL graphics.'

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=9378

--- Comment #22 from Kevin2k <gbroers at quicknet.nl> ---
First I must correct something in my message and attachment from yesterday: 
Wine 5.61 should read Wine 5.16 there. 


@joaopa 
I am not an openGL or Wine programmer. But I can understand unwillingness to
merge the patch by Alexander Puzankov 2017-05-24, as is. That would change
cAlphaShift from 0 to 24 for every PixelFormat entry. But as you can see in the
real hardware logs that I attached, that is not normal behavior. cAlphaShift is
24 only for select PixelFormat entries. Usually it is indeed 0. (and I see some
rare instances of 48.) On the other hand, in all the hardware I tested, only
the ancient 3DFX Voodoo3 lacks PixelFormats with cAlphaShift 24. In other
words: It appears to be normal practice for real hardware/drivers to offer some
PixelFormats with cAlphaShift 24. 

Questions that arise: 
- What is cAlphaShift?
- Which Wine/Mesa PixelFormats would a cAlphaShift of 24 apply to?
- Is it just a matter of changing the cAlphaShift value for these PixelFormats
or does it require more extensive adjustments?
- Would it be more practical to ask about this matter at
https://www.mesa3d.org?

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