[vtkusers] X11 fullscreen mode and bugs in input handling

[Glen.Coates at csiro.au]

Apologies for the repost, but this is a very important performance issue 
for me (and I suspect many other X users).

I've checked out the source to vtkXOpenGLRenderWindow and looked at the 
code fragments dealing with fullscreen modes, and I notice there are no X 
API calls requesting a mode switch, only calls to drop WM decorations and 
resize the window to cover the entire display.  Obviously, the current 
method will only hinder performance, rather than increase it.

Are there any plans (Will?) to update the X code to implement a proper X 
mode switch to other (lower) resolutions for rendering (ie 640x480, 
800x600 etc)?  I would love to contribute the code for this, however I 
have zero experience programming with the X API (ugh!).

Also, I think there is a bug in the current X fullscreen mode 
implementation with the input handling.  When you go to fullscreen mode, 
the application no longer receives mouse/keyboard events, however 
continues to run non-interactive code just fine.  There are calls to 
XGrabKeyboard() sitting in the source, which I guess must be the root of 
the problem (?) ...

-- 
Cheers,
Glen