Re: [AD] Fullscreen problems on Linux

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I don't know what it looks like under the hood, but when I uncheck "legacy fullscreen support" for Compiz, Allegro doesn't fail to create the display, instead it creates a big window that covers everything except the Unity dock and title bar.

Trent

On 2014-07-09 1:14 PM, Thomas Fjellstrom wrote:
On Wed 09 Jul 2014 01:12:04 PM Trent Gamblin wrote:
If you can figure out how to detect if mode setting doesn't work that
would be a good start.
Indeed. Hmm. Well, there ought to be something we can ask the WM or X. If it
won't set modes, that operation should either fail, or not be available at
all.

Trent

On 2014-07-09 1:09 PM, Thomas Fjellstrom wrote:
On Wed 09 Jul 2014 09:45:47 AM Trent Gamblin wrote:
A full screen blit is not negligible on a netbook or similarly low
powered computer. It's a huge difference. The point is, whether you
personally would use it or not mode setting is something that should be
supported for people who want it. We won't get it though because open
source devs are morons as usual.
Personally I think we need both mode setting, and emulation. Of course if
the WM breaks mode setting on us, there's not much we can do about that.
It'll have to go in a FAQ, possibly in the docs, and on the wiki.

"Hey, your WM is broken!" And compiz is truly broken. A lot of things were
broken when I was writing the full screen and mode listing code, so much
so
that I gave up trying to fix it all.

But yeah, if we can detect that mode setting is broken in
ALLEGRO_FULLSCREEN, it might make sense to emulate in that case. And
allow the user to select the emulated case as well.

Trent

On 2014-07-09 9:30 AM, Elias Pschernig wrote:
On Wed, Jul 9, 2014 at 5:11 PM, Beoran <beoran@xxxxxxxxxx> wrote:
Elias, I beg to disagree on that point.

Real mode setting is essential for games and perhaps surprisingly so,
for security applications.
Not everyone uses a low quality LCD panel that only works well at it's
native resolution as their
display! What if I want to show my images on a real TV, or on a high
quality display that supports
mode setting well?
Which theoretical displays are you talking of? Everything I know,
especially TVs (be it LCD, LED, plasma), has a native resolution and
running something in another resolution looks bad.

Also, for games, especially old games, retro games, or games that have
to run well on
older computers or low powered ones, the ability to mode set is
essential for higher performance
and pixel perfect quality. So we can give our players what they want.
But no one in the Wayland team thinks much of games or industrial
control safety apps...
I don't think performance matters. The game itself would still use the
lower resolution so there is no difference. The only change is the one
final scaled image in al_flip_display - any GPU in existance should be
able to perform that without noticable overhead.

Also, the quality will be better. If you use a mode-changing
fullscreen, then the monitor itself will have to do the scaling. But
it has no GPU so will do a very crude and low quality job. That's
certainly true for any LCD monitor I've ever had. Using the GPU to do
the scaling on the other hand you can get good quality scaling. Also,
I suggested an extra integer-only scaling mode, which would make sure
there's no possible scaling artefacts at all. Something mode-changing
fullscreen would not allow.

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-- 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





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