[Bug 40828] New: Switching resolution in desktop mode makes task bar redraw on top of full screen game

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=40828

            Bug ID: 40828
           Summary: Switching resolution in desktop mode makes task bar
                    redraw on top of full screen game
           Product: Wine
           Version: 1.9.12
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: wine-bugs at winehq.org
          Reporter: o.dierick at piezo-forte.be
      Distribution: ---

I got this issue with Aliens versus Predator Classic 2000 on Steam.

Preamble :

The game uses 800x600 screen size to render cinematic and the main menu.
The gameplay uses whatever screen resolution is set in the game video options
menu. It switches between those two resolutions when starting or abandoning a
level or when showing an in-game cinematic.

The Wine virtual desktop mode is set to the native screen resolution that is
the same resolution used for gameplay. When the game does not run, the Steam
window and the task bar are visible and working properly. Steam puts an icon in
the notification tray of the task bar.

Issue :

When the game is launched it switches the desktop to 800x600 to show the intro
cinematic. The task bar is visible and covers the bottom of the full-screen
game. The cinematics are letter-boxed and the menu has nothing of importance on
those few bottom pixels so it's not that much a problem. When starting a level,
the game switches to the native screen resolution, but the task bar still
covers the bottom of the screen. The game can be played as the task bar does
not hide much but it contrasts with the game and should be hidden by the
full-screen app anyway.

Workaround :

The game grabs the mouse, so it is by default not possible to click on the
window button on the task bar to refresh the game window, but activating the
Steam game overlay frees the mouse cursor, and allow to click on the window
button on the task bar. Clicking on that button twice makes the game window
redraw over the task bar. The Steam overlay can then be closed and the game can
be played with the task bar hidden.

However, starting/abandoning a level or viewing a cinematic makes the game
switch resolution and the task bar come back.

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