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Re: [Qemu-devel] [PATCH 1/8] sdl2: Fix broken display updating after the

From: Gerd Hoffmann
Subject: Re: [Qemu-devel] [PATCH 1/8] sdl2: Fix broken display updating after the window is hidden
Date: Mon, 13 Nov 2017 13:59:33 +0100
User-agent: NeoMutt/20171027

On Mon, Nov 13, 2017 at 01:39:14PM +0100, Gerd Hoffmann wrote:
> On Sun, Nov 12, 2017 at 08:30:25PM +0100, Jindrich Makovicka wrote:
> > With SDL 2.0.6, calling SDL_ShowWindow during SDL_WINDOWEVENT_HIDDEN
> > blocks all subsequent display updates.
> > 
> > Instead of trying to override the change, just update the scon->hidden
> > flag.
> Has for me the side effect that sometimes I have to press ctrl-alt-2
> twice.  Showing window first time works.  Hiding the window works too.
> Showing it the second time needs the double keypress.
> Added fprintfs to figure why [1].  Reason for that seems to be a suspious
> SDL_WINDOWEVENT_SHOWN event from SDL, so qemu thinks the window is
> visible even though it actually is hidden.
> Have a slightly older SDL version (2.0.3).  Do you see that effect with
> 2.0.6 too?

Oh, and I've just seen the current code has been added as attempt to
workaround that bug, see commit d3f3a0f453ea590be529079ae214c200bb5ecc1a.

Hmm.  Seems we are trading one issue for another here, due to bugs in
SDL :(


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