dinput: Add mouse warp override config option.

dlls/dinput/mouse.c

@@ -30,6 +30,7 @@
 #include "wingdi.h"
 #include "winuser.h"
 #include "winerror.h"
+#include "winreg.h"
 #include "dinput.h"
 
 #include "dinput_private.h"
@@ -50,6 +51,13 @@ static const IDirectInputDevice8WVtbl SysMouseWvt;
 
 typedef struct SysMouseImpl SysMouseImpl;
 
+typedef enum
+{
+    WARP_DEFAULT,
+    WARP_DISABLE,
+    WARP_FORCE_ON
+} WARP_MOUSE;
+
 struct SysMouseImpl
 {
     struct IDirectInputDevice2AImpl base;
@@ -66,6 +74,8 @@ struct SysMouseImpl
 
     /* This is for mouse reporting. */
     DIMOUSESTATE2                   m_state;
+
+    WARP_MOUSE                      warp_override;
 };
 
 static void dinput_mouse_hook( LPDIRECTINPUTDEVICE8A iface, WPARAM wparam, LPARAM lparam );
@@ -174,6 +184,8 @@ static SysMouseImpl *alloc_device(REFGUID rguid, const void *mvt, IDirectInputIm
     SysMouseImpl* newDevice;
     LPDIDATAFORMAT df = NULL;
     unsigned i;
+    char buffer[20];
+    HKEY hkey, appkey;
 
     newDevice = HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,sizeof(SysMouseImpl));
     if (!newDevice) return NULL;
@@ -186,6 +198,17 @@ static SysMouseImpl *alloc_device(REFGUID rguid, const void *mvt, IDirectInputIm
     newDevice->base.dinput = dinput;
     newDevice->base.event_proc = dinput_mouse_hook;
 
+    get_app_key(&hkey, &appkey);
+    if (!get_config_key(hkey, appkey, "MouseWarpOverride", buffer, sizeof(buffer)))
+    {
+        if (!strcasecmp(buffer, "disable"))
+            newDevice->warp_override = WARP_DISABLE;
+        else if (!strcasecmp(buffer, "force"))
+            newDevice->warp_override = WARP_FORCE_ON;
+    }
+    if (appkey) RegCloseKey(appkey);
+    if (hkey) RegCloseKey(hkey);
+
     /* Create copy of default data format */
     if (!(df = HeapAlloc(GetProcessHeap(), 0, c_dfDIMouse2.dwSize))) goto failed;
     memcpy(df, &c_dfDIMouse2, c_dfDIMouse2.dwSize);
@@ -306,7 +329,9 @@ static void dinput_mouse_hook( LPDIRECTINPUTDEVICE8A iface, WPARAM wparam, LPARA
                 wdata = pt1.y;
             }
 
-            This->need_warp = (pt.x || pt.y) && dwCoop & DISCL_EXCLUSIVE;
+            This->need_warp = This->warp_override != WARP_DISABLE &&
+                              (pt.x || pt.y) &&
+                              (dwCoop & DISCL_EXCLUSIVE || This->warp_override == WARP_FORCE_ON);
             break;
         }
         case WM_MOUSEWHEEL:
@@ -422,14 +447,18 @@ static HRESULT WINAPI SysMouseAImpl_Acquire(LPDIRECTINPUTDEVICE8A iface)
       else
         ERR("Failed to get RECT: %d\n", GetLastError());
     }
-    
+
+    /* Need a window to warp mouse in. */
+    if (This->warp_override == WARP_FORCE_ON && !This->base.win)
+        This->base.win = GetDesktopWindow();
+
     /* Get the window dimension and find the center */
     GetWindowRect(This->base.win, &rect);
     This->win_centerX = (rect.right  - rect.left) / 2;
     This->win_centerY = (rect.bottom - rect.top ) / 2;
-    
+
     /* Warp the mouse to the center of the window */
-    if (This->base.dwCoopLevel & DISCL_EXCLUSIVE)
+    if (This->base.dwCoopLevel & DISCL_EXCLUSIVE || This->warp_override == WARP_FORCE_ON)
     {
       This->mapped_center.x = This->win_centerX;
       This->mapped_center.y = This->win_centerY;
@@ -463,7 +492,7 @@ static HRESULT WINAPI SysMouseAImpl_Unacquire(LPDIRECTINPUTDEVICE8A iface)
     }
 
     /* And put the mouse cursor back where it was at acquire time */
-    if (This->base.dwCoopLevel & DISCL_EXCLUSIVE)
+    if (This->base.dwCoopLevel & DISCL_EXCLUSIVE || This->warp_override == WARP_FORCE_ON)
     {
       TRACE(" warping mouse back to (%d , %d)\n", This->org_coords.x, This->org_coords.y);
       SetCursorPos(This->org_coords.x, This->org_coords.y);