ChangeDisplaySettings(Neverwinter Nights)

[Tommy Schultz Lassen]

Her is a partial implementation of ChangeDisplaySettings and friends.

It currently works if "Desktop" is set to the size the display is
changed to or if Managed=N.

For Desktop not the size that the display is changed to the code tries
SetWindowPos and XResizeWindow witch work in sawfis but dosent in
kde. How does i change the size of the desktop shouldent this work?

I haven't got any gut ideas how to implement this in Managed=Y. Does
any of you?

Dispay size changes does ony take place if xvidmode is used.

"Sorry for my bad English"

MVH Tommy.

[Sylvain Petreolle]

What does this one ?

--- Tommy Schultz Lassen  a écrit :
> Her is a partial implementation of ChangeDisplaySettings and friends.
>
> It currently works if "Desktop" is set to the size the display is
> changed to or if Managed=N.
>
> For Desktop not the size that the display is changed to the code
> tries
> SetWindowPos and XResizeWindow witch work in sawfis but dosent in
> kde. How does i change the size of the desktop shouldent this work?
>
> I haven't got any gut ideas how to implement this in Managed=Y. Does
> any of you?
>
> Dispay size changes does ony take place if xvidmode is used.
>
> "Sorry for my bad English"
>
> MVH Tommy.

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[Tommy Schultz Lassen]

Sylvain Petreolle  writes:
> What does this one ?

When in Desktop mode it:
  1: Tries to change the desktop's size to the size specified in the
  call to ChangeDisplaySettings.
        Dosent work in kdm. I don't know whey yet.
  2: Confines the pointer to the desktop window.
  3: Changes the screen size to that specified in the call to
  ChangeDisplaySettings.
        Only works if xvidmode is used.
When Managed=N
  1: Creates a new window of the size specified in the call to
  ChangeDisplaySettings.  
  2: Grabs The mouse to the newly created window.
  3: Changes the screen size to that specified in the call to
  ChangeDisplaySettings.
        Only works if xvidmode is used.
When Managed=Y
  1: Dosend do any thing yet.
        I cant use the method of Managed=N because i don't know where
        the other windows are and cant confine the to the newly
        created window.

Tees makes Neverwinter Nights playable even when running it on a
XServer with a hirer resolution than the game is using because the
mouse is confined th the resolution specified by the game.

MVH Tommy.

[Sylvain Petreolle]

Okay, then I have a question :
What happens in mode "Desktop" = "N" ?
Without your patch applied at this time, Quake III Arena can resize
it's screen but is complaining about this function being a stub.

I write this because i don't know what function can be used to resize
screen / change video mode.
In this way it's difficult to know if the call to the other function
has been made prior to the ChangeDisplaySettings call.

Consider that the other fnction resizes the screen and
ChangeDisplaySettings is called after : 
- the game resizes the screen without problem.
- a call to ChangeDisplaySettings is made.
Would the resize be made twice ?
> When in Desktop mode it:
>   1: Tries to change the desktop's size to the size specified in the
>   call to ChangeDisplaySettings.
>         Dosent work in kdm. I don't know whey yet.
>   2: Confines the pointer to the desktop window.
>   3: Changes the screen size to that specified in the call to
>   ChangeDisplaySettings.
>         Only works if xvidmode is used.
> When Managed=N
>   1: Creates a new window of the size specified in the call to
>   ChangeDisplaySettings.  
>   2: Grabs The mouse to the newly created window.
>   3: Changes the screen size to that specified in the call to
>   ChangeDisplaySettings.
>         Only works if xvidmode is used.
> When Managed=Y
>   1: Dosend do any thing yet.
>         I cant use the method of Managed=N because i don't know where
>         the other windows are and cant confine the to the newly
>         created window.
>
> Tees makes Neverwinter Nights playable even when running it on a
> XServer with a hirer resolution than the game is using because the
> mouse is confined th the resolution specified by the game.
>
> MVH Tommy.

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[Tommy Schultz Lassen]

Sylvain Petreolle  writes:
> Okay, then I have a question :
> What happens in mode "Desktop" = "N" ?

That depends. If Managed=N it would change the mode. If Managed=Y it
is still uninplimentet and dosend change anything.
> Without your patch applied at this time, Quake III Arena can resize
> it's screen but is complaining about this function being a stub.
>
> I write this because i don't know what function can be used to resize
> screen / change video mode.
> In this way it's difficult to know if the call to the other function
> has been made prior to the ChangeDisplaySettings call.
>
> Consider that the other fnction resizes the screen and
> ChangeDisplaySettings is called after :
> - the game resizes the screen without problem.
> - a call to ChangeDisplaySettings is made.
>
> Would the resize be made twice ?

I haven't tested it but if the mode specified in ChangeDisplaySettings
is different the mode is changed again. If not It shouldend be changed.

MVH Tommy

[Lionel Ulmer]

> It currently works if "Desktop" is set to the size the display is
> changed to or if Managed=N.

Well, I just have one problem with this patch : you call XGrabPointer in
your code :

+       TSXGrabPointer(thread_display(), window, True, 0, GrabModeAsync, GrabModeAsync, window, None, CurrentTime);

That means that, after this, only this particular thread will receive any
mouse inputs. Ie if your application has one thread doing a resolution
change and another doing the mouse input, you will break it (at least this
is my understanding of the whole 'thread_display' 'mess' :-) ).

So to really have a desktop full screen option working (I was working on it
some times ago), you would need :

1) either a 'grabless' window retriction X extension (ie say to X that you
    want the mouse to be restricted to one particular window but to still
    send events to all the connections)

2) do what I was trying to do : have an X extension to 'lock' the viewport
    after having done a resolution change (I started on it, but was a bit
    stuck on some implementation details). After, you would need, of course,
    some Window Manager extensions to tell 'hey, from now on, I do not want
    to switch desktops when going at the edge of the screen'.

This is why DXGrab works, because the grabbing is done in the context of the
thread initializating DInput (ie the thread that will do the actual input
event handling).

Lionel