[Bug 59865] New: QueryDisplayConfig - Problem Finding Primary Display

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=59865

            Bug ID: 59865
           Summary: QueryDisplayConfig - Problem Finding Primary Display
           Product: Wine
           Version: 11.10
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: ntdll
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

To reproduce
(1.) Run multi-display Linux configuration (like a laptop)
(2.) Have the built-in display the secondary (extended) display
(3.) Have the HDMI/DP out 2nd display be set as the primary display
(4.) One can verify this by looking at the desktop offsets in X Windows
(5.) The primary display has offset {0,0}
(6.) The secondary display will have some other non-zero offsets

Run a WIN32 app using wine that uses QueryDisplayConfig.

Walk the DISPLAYCONFIG_PATH_INFO array
The DISPLAYCONFIG_PATH_TARGET_INFO part of that gives desktopModeInfoIdx

Which can be used to find the DISPLAYCONFIG_MODE_INFO entry
Which will have a DISPLAYCONFIG_DESKTOP_IMAGE_INFO union element filled out
Which has DesktopImageRegion

That image region needs to be offset at {0,0} for the primary display
And it isn't in my testing

Suggested fix: have QueryDisplayConfig actually match the active X Server
configuration for multi-display situations

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