[PATCH v6 4/6] d3d8/tests: Test for window changes when it's not foreground.

[Stefan Dösinger]

Am Donnerstag, 13. Jänner 2022, 20:49:43 EAT schrieb Gabriel Ivăncescu:
> Signed-off-by: Gabriel Ivăncescu <gabrielopcode at gmail.com>
> ---
> 
> For some reason I had to use AttachThreadInput, otherwise I couldn't set
> the window to foreground on Windows, even from the thread itself, it always
> failed... I don't know why but apparently this is a common "trick" to get
> around it.

I vaguely remember that I had some luck with minimizing and restoring the 
window, see test_wndproc() in d3d9/tests/device.c:

        /* I have to minimize and restore the focus window, otherwise native 
d3d9 fails
         * device::reset with D3DERR_DEVICELOST. This does not happen when the 
window
         * restore is triggered by the user. */
        expect_messages = tests[i].reactivate_messages;
        ShowWindow(focus_window, SW_MINIMIZE);
        ShowWindow(focus_window, SW_RESTORE);
        /* Set focus twice to make KDE and fvwm in focus-follows-mouse mode 
happy. */
        SetForegroundWindow(focus_window);
        flush_events();
        SetForegroundWindow(focus_window);
        flush_events(); /* WM_WINDOWPOSCHANGING etc arrive after 
SetForegroundWindow returns. */

Note that some of the quirks in that test are to make weird Linux WMs happy, 
but some are to make Windows do what we want.

Attaching the thread input might have unintended side effects, like both 
threads being considered foreground or so. Not sure though.

---

So let me recap the ddraw, d3d8, d3d9, dxgi tests for my understanding:

ddraw: The ddraw window itself needs to be foreground, otherwise it is not 
made topmost

d3d8: Any process window needs to be foreground for the device window to be 
made topmost

d3d9: The device window is made topmost, no matter what
d3d9ex: The focus window needs to be foreground

dxgi: like plain d3d9, the window is made foreground no matter what.

What a mess...
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