[Bug 58731] New: Using newer versions of dgVoodoo2 to play older games fail to initialize.

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=58731

Bug ID: 58731
           Summary: Using newer versions of dgVoodoo2 to play older games
                    fail to initialize.
           Product: Wine-staging
           Version: 10.15
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
                CC: [e-mail], [e-mail]
      Distribution: ---

This is a year old bug around the Steam and later Lutris gaming community when
notice the dgVoodoo2 wrapper after version 2.80 fail to work on Wine, either
Proton or Proton-GE or any forks. Since Proton always uses DXVK for Direc3D 11
rendering (the dgVoodoo2 output), it was common to combine dgVoodoo2 with DXVK
to wrap old DirectX and 3dfx Glide code to Direct3D 11, leaving DXVK to
translate to Vulkan.

As the time goes around, Dege was wary the fact that the last version of this
own creation is now 2.86.2 at the time of writing and Lutris never update
beyond 2.80 or a modded version called 2.8.2

After some testing and a rare game called Montezuma's Return which have a 3dfx
version, I discovery that using dgVoodoo2 over Wine's vanilla DirectX 11
implementation also had the same problems like Proton or Wine-GE (modded
versions) with DXVK.

This old Glide game works with the lastest dgVoodoo2 without problems, while
DirectDraw games like Omikron or Carmageddon TDR2000 fail to work using the
lastest dgVoodoo2, but older versions worked fine.

But the latter games had GPU diagnose tools and a pattern was found. If the
dgVoodoo2 wrapper works, then the virtual dgVoodoo DirectX wrapper appears on
devices list. If not, it displays the Wine's safe mode software renderer
(DirectDraw HAL). Forcing playing the game, makes them crash or running at
slowest speeds. 
 After all testing, the issue happens either using DXVK or Wine's DirectX
implementation, meaning that the problem should be found on Wine's code.

Computers with Mesa drivers at certain games could start dgVoodoo2 2.86.2 on
games like Omikron, which means that this open-source drivers code had an
unintended workaround to force dgVoodoo2 to work, but this is rare and not
always work.

The test with Montezuma Return shows that the emulation code from Glide to
DirectX works on Wine, along the DirectDraw emulation that work on certain
cases. However the real issue is the initialization routine (that was changed)
caused this huge regression, and it is not be handled by Wine.