[PATCH 0/1] MR2625: winex11.drv: Fix bit shifts in pixel format description for RGBA formats.

[Paul Gofman (＠gofman)]

Fixes Combat Mission: Battle for Normandy (GL game) failing to initialize GL on start. Looks like the game depends specifically on cAlphaShift being 24 (seemingly without any other prior checks, simply surfing through gdi32.DescribePixelFormat).

The shifts in winex11.drv are obviously wrong currently: alpha channel doesn't preceded BGR in BGRA format (which is also confirmed by the test). cAlphaShift is a bit trickier though, that is marked as unsupported on Deck. Here on real hardware AMD desktop it is 24 (and alpha bits are 8). That's not the case on one Testbot machine though (win11_nv64) where both cAlphaShift and cAlphaBits are 0. So I made the test to accept such case as well.