Re: [AD] Fullscreen problems on Linux

[beoran@xxxxxxxxxx]

On xubuntu under xfwm4, it doesn't work well, a "full screen" is set,
however, that full screen ends up cntered on the upper left of my
screen and the rest of old desktop is still visible. If I replace the
xfwm4 with compiz, then I do get a full screen window, but the
resolution is not adjusted to 640x480 which is the size of the window
I requested. If I disable the patch and use the old XRANR mode setting
it all works fine.

Probably some subtle details must be set in order for xfwm4 to do the
fullscreen correctly, since it does advertise fullscreen support. I'll
try to play with it a bit tomorrow and see if I can't get it to work.

Also, I noticed that the fucntion that checks of support for net wm
resolution changing isn't quite correct (also not in SDL for that
matter)?. Now, we just check if a _new_wm supporting WM is there, but
we also need to check the  _NET_WM_ALLOWED_ACTIONS atom for
_NET_WM_ACTION_FULLSCREEN. See here for more details:
http://standards.freedesktop.org/wm-spec/1.3/ar01s05.html#idm140238712303632

Maybe the way of switching to fullscreen will need to be made
configurable though allegro.cfg as well, seeing that someWMs seem to
support fullcreen setting incorrectly or differently than others.

Kind Regards,

B.

On 7/7/14, Trent Gamblin <trent@xxxxxxxxxx> wrote:
> To test it change ex_bitmap.c to have
> al_set_new_display_flags(ALLEGRO_FULLSCREEN) before al_create_display.
> Optionally change the display size.
>
> On 2014-07-07 11:49 AM, Trent Gamblin wrote:
>> I had another go at it. The problem was again CMake. This time it
>> works, but I'd like if as many people as possible can test on
>> different WMs. I tested the defaults (Metacity?, Compiz) on Ubuntu
>> 10.04 and 14.04. Patch attached.
>>
>> Thanks,
>> Trent
>>
>> On 14-07-07 10:24 AM, Trent Gamblin wrote:
>>> OK, I thought that might be how it worked which is why I started working
>>> on it.The problem I ran into was probably the same thing that prevented
>>> the old way of working (CMake not picking up deps) so I might try it
>>> again later on.
>>>
>>> Trent
>>>
>>> On 2014-07-07 10:12 AM, Beoran wrote:
>>>> I checked the SDL code again, and no, this seems to be a different
>>>> code path
>>>> from their fullscreen window which they call
>>>> SDL_WINDOW_FULLSCREEN_DESKTOP.
>>>>
>>>> The way mode switching through the vm is supposed to work is that you
>>>> set a
>>>> _NET_WM_STATE_FULLSCREEN on the _NET_WM_STATE property, and the window
>>>> manager
>>>> is supposed to pick that up, switch to a full-screen resolution equal
>>>> to that of your window
>>>> size and treat your window as a fullscreen one. Supposedly, the WM
>>>> should
>>>> set full screen even if the window isn't of a correct size, arguably
>>>> to the supported mode
>>>> with size closest the window's size.
>>>>
>>>> So in theory you don't have to know which modes are supported
>>>> by the hardware.... Of course, far from all windows managers support
>>>> this, and if they do,
>>>> the results are mixed, and the window managers disagree on whether the
>>>> window should be resizable
>>>> for them to resize it or not. But compiz apparently supports this
>>>> correctly if you do
>>>> make the window resizable.
>>>>
>>>> However for determining the available video modes SDL still uses
>>>> either XRandr
>>>> or Xinerama independent of whether it uses the WM for switching modes
>>>> or not.
>>>> So , we can still get the mode list from XRandr and use that.
>>>> You can look in SDL_x11modes.c for the nitty gritty.
>>>>
>>>> Kind Regards,
>>>>
>>>> B.
>>>>
>>>>
>>>> Op 07-07-14 17:17, Trent Gamblin schreef:
>>>>> I'm not sure that what SDL is doing there isn't what we call
>>>>> fullscreen
>>>>> window.
>>>>>
>>>>> Anyhow, two things. First I found out that CMake was screwing up
>>>>> and not
>>>>> picking up some headers or libraries so it works as before now.
>>>>> Second, I
>>>>> assumed it wasn't fullscreen window and started implementing it
>>>>> anyway but
>>>>> there's no way to get a mode list anyway so it failed there.
>>>>>
>>>>> Trent
>>>> ------------------------------------------------------------------------------
>>>>
>>>>
>>>> Open source business process management suite built on Java and Eclipse
>>>> Turn processes into business applications with Bonita BPM Community
>>>> Edition
>>>> Quickly connect people, data, and systems into organized workflows
>>>> Winner of BOSSIE, CODIE, OW2 and Gartner awards
>>>> http://p.sf.net/sfu/Bonitasoft
>>>
>>> ------------------------------------------------------------------------------
>>>
>>>
>>> Open source business process management suite built on Java and Eclipse
>>> Turn processes into business applications with Bonita BPM Community
>>> Edition
>>> Quickly connect people, data, and systems into organized workflows
>>> Winner of BOSSIE, CODIE, OW2 and Gartner awards
>>> http://p.sf.net/sfu/Bonitasoft
>>
>>
>>
>> ------------------------------------------------------------------------------
>> Open source business process management suite built on Java and Eclipse
>> Turn processes into business applications with Bonita BPM Community
>> Edition
>> Quickly connect people, data, and systems into organized workflows
>> Winner of BOSSIE, CODIE, OW2 and Gartner awards
>> http://p.sf.net/sfu/Bonitasoft
>>
>>
>
>