Asymmetric mouse movement in DGA2 mode - wine-devel

4 Jun 2002


      Hi:
I patched 'windows/x11drv/event.c' to run Starcraft in DGA2 mode.
In DGA2 I noticed that the mouse movement is't symmetric, ie: mouse
speed when moving left/up < mouse speed when moving right/down.
To fix this, I modified 'dlls/x11drv/mouse.c', adding:
void X11DRV_DGAMotionEvent( HWND hwnd, XDGAMotionEvent *event )
{
    update_key_state( event->state );
    // HACK: fix asymmetric mouse motion
    if(event->dx < 0) event->dx *= 2;
    if(event->dy < 0) event->dy *= 2;
    send_mouse_event( hwnd, MOUSEEVENTF_MOVE, event->dx, event->dy, 0,
event->time );
}
(just empirical values)
Why does this happen? Is there any cleaner solution?
Observation: in 'send_mouse_event' says:
"/* Relative mouse movements seem not to be scaled as absolute ones */"
BTW, in this application, when the mouse reaches the border of the
screen (moving the mouse cursor out of the window), the view is supposed
to be scrolled in that direction.
This doesn't work in DGA mode, but works when not using DGA
Any idea?
System: latest winex CVS version + XFree86 4.2.0