[Bug 6971] Mouse "escapes" window or is confined to an area in the full screen program

http://bugs.winehq.org/show_bug.cgi?id=6971

--- Comment #206 from Daniel Scharrer   2009-01-13 11:42:54 ---
Created an attachment (id=18681)
 --> (http://bugs.winehq.org/attachment.cgi?id=18681)
Hack to read raw mouse movement from /dev/input/mice

I know XInput 2.0 will make this all obsolete, but being impatient I created a
hack that somewhat works with Star Wars: Knights of the Old Republic:
- I'm guessing this is Linux specific and won't work on Mac and *BSD.
- Obviously you need read access to /dev/input/mice, which at least on my
distro you don't have by default.
- Moving the mouse when right clicked works as expected even when leaving the
window / hitting the edge of the screen.
- However, at least with SW:KOTR, when releasing the right mouse button while
the cursor is over the window (well, it's hidden) the game locks up until you
left-click the window. When the mouse is not over the window while releasing
the RMB everything works fine.
Removing the read(...) from line 318 fixes this, but obviously makes the patch
useless.

I'm guessing the input hook is the wrong place to read the mouse from, but at
least it ensures the mouse movement is properly updated (minimize overflows)
and prevents unnecessary read()'s like you would get when placing the read()
directly into SysMouseAImpl_GetDeviceState().