Ignore K/M input when the cursor is outside of the rendering window

src/common/input/DInputKeyboardMouse.cpp

@@ -152,6 +152,11 @@ namespace DInput
 
 	bool KeyboardMouse::UpdateInput()
 	{
+		if (mo_leave_wnd) {
+			std::memset(&m_state_in, 0, sizeof(m_state_in));
+			return true;
+		}
+
 		DIMOUSESTATE2 tmp_mouse;
 
 		HRESULT kb_hr = m_kb_device->GetDeviceState(sizeof(m_state_in.keyboard), &m_state_in.keyboard);

src/common/input/DInputKeyboardMouse.h

@@ -35,6 +35,7 @@
 namespace DInput
 {
 	inline bool bKbMoEnumerated = false;
+	inline bool mo_leave_wnd = false;
 	inline LONG mo_axis_range_pos = 0;
 	inline LONG mo_axis_range_neg = 0;
 	inline LONG mo_wheel_range_pos = 0;

src/core/hle/D3D8/Direct3D9/Direct3D9.cpp

@@ -64,6 +64,7 @@
 #include "WalkIndexBuffer.h"
 #include "core\kernel\common\strings.hpp" // For uem_str
 #include "common\input\SdlJoystick.h"
+#include "common\input\DInputKeyboardMouse.h"
 #include "common/util/strConverter.hpp" // for utf8_to_utf16
 #include "VertexShaderSource.h"
 
@@ -2030,11 +2031,33 @@ static LRESULT WINAPI EmuMsgProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lPar
         }
         break;
 
+        case WM_MOUSELEAVE:
+        {
+            DInput::mo_leave_wnd = true;
+            g_bIsTrackingMoLeave = false;
+            g_bIsTrackingMoMove = true;
+        }
+        break;
+
         case WM_MOUSEMOVE:
         {
             if (g_bClipCursor) {
                 CxbxClipCursor(hWnd);
             }
+
+            if (!g_bIsTrackingMoLeave) {
+                TRACKMOUSEEVENT tme;
+                tme.cbSize = sizeof(TRACKMOUSEEVENT);
+                tme.hwndTrack = hWnd;
+                tme.dwFlags = TME_LEAVE;
+                TrackMouseEvent(&tme);
+                g_bIsTrackingMoLeave = true;
+
+                if (g_bIsTrackingMoMove) {
+                    DInput::mo_leave_wnd = false;
+                    g_bIsTrackingMoMove = false;
+                }
+            }
         }
         break;
 

src/core/kernel/init/CxbxKrnl.cpp

@@ -115,6 +115,8 @@ bool g_bIsWine = false;
 bool g_bClipCursor = false;
 bool g_CxbxPrintUEM = false;
 ULONG g_CxbxFatalErrorCode = FATAL_ERROR_NONE;
+bool g_bIsTrackingMoLeave = false;
+bool g_bIsTrackingMoMove = false;
 
 // Define function located in EmuXApi so we can call it from here
 void SetupXboxDeviceTypes();

src/core/kernel/init/CxbxKrnl.h

@@ -203,6 +203,8 @@ extern bool g_bIsWine;
 extern bool g_bClipCursor;
 extern bool g_CxbxPrintUEM;
 extern ULONG g_CxbxFatalErrorCode;
+extern bool g_bIsTrackingMoLeave;
+extern bool g_bIsTrackingMoMove;
 
 extern size_t g_SystemMaxMemory;