[PATCH 0/2] MR6833: dinput: Only call SetCursorPos if ClipCursor fails.

[Rémi Bernon (＠rbernon)]

Fixes mouse sometimes jumping around in Mechwarrior Online on
KDE/Wayland.

[PATCH 1/2] dinput: Assume that clipping the cursor uses the requested rectangle.

[Rémi Bernon]

From: Rémi Bernon

---
 dlls/dinput/mouse.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/dlls/dinput/mouse.c b/dlls/dinput/mouse.c
index ec30c825733..d376546f1a9 100644
--- a/dlls/dinput/mouse.c
+++ b/dlls/dinput/mouse.c
@@ -306,8 +306,8 @@ static void warp_check( struct mouse *impl, BOOL force )

if (force || (impl->need_warp && (now - impl->last_warped > interval)))
     {
-        RECT rect, new_rect;
         POINT mapped_center;
+        RECT rect;

impl->last_warped = now;
         impl->need_warp = FALSE;
@@ -328,8 +328,7 @@ static void warp_check( struct mouse *impl, BOOL force )
             rect.right = min( rect.right, rect.left + GetSystemMetrics( SM_CXVIRTUALSCREEN ) - 2 );
             rect.bottom = min( rect.bottom, rect.top + GetSystemMetrics( SM_CYVIRTUALSCREEN ) - 2 );
             TRACE("Clipping mouse to %s\n", wine_dbgstr_rect( &rect ));
-            ClipCursor( &rect );
-            impl->clipped = GetClipCursor( &new_rect ) && EqualRect( &rect, &new_rect );
+            impl->clipped = ClipCursor( &rect );
         }
     }
 }

[PATCH 2/2] dinput: Only call SetCursorPos if ClipCursor fails.

[Rémi Bernon]

From: Rémi Bernon

Fixes mouse sometimes jumping around in Mechwarrior Online on
KDE/Wayland.
---
 dlls/dinput/mouse.c | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/dlls/dinput/mouse.c b/dlls/dinput/mouse.c
index d376546f1a9..2d4e0a6b42c 100644
--- a/dlls/dinput/mouse.c
+++ b/dlls/dinput/mouse.c
@@ -313,13 +313,6 @@ static void warp_check( struct mouse *impl, BOOL force )
         impl->need_warp = FALSE;
         if (!GetClientRect( impl->base.win, &rect )) return;
         MapWindowPoints( impl->base.win, 0, (POINT *)&rect, 2 );
-        if (!impl->clipped)
-        {
-            mapped_center.x = (rect.left + rect.right) / 2;
-            mapped_center.y = (rect.top + rect.bottom) / 2;
-            TRACE( "Warping mouse to x %+ld, y %+ld.\n", mapped_center.x, mapped_center.y );
-            SetCursorPos( mapped_center.x, mapped_center.y );
-        }
         if (impl->base.dwCoopLevel & DISCL_EXCLUSIVE)
         {
             /* make sure we clip even if the window covers the whole screen */
@@ -330,6 +323,13 @@ static void warp_check( struct mouse *impl, BOOL force )
             TRACE("Clipping mouse to %s\n", wine_dbgstr_rect( &rect ));
             impl->clipped = ClipCursor( &rect );
         }
+        if (!impl->clipped)
+        {
+            mapped_center.x = (rect.left + rect.right) / 2;
+            mapped_center.y = (rect.top + rect.bottom) / 2;
+            TRACE( "Warping mouse to x %+ld, y %+ld.\n", mapped_center.x, mapped_center.y );
+            SetCursorPos( mapped_center.x, mapped_center.y );
+        }
     }
 }