core/hid: Improve accuary of mouse implementation

1 files changed, 4 insertions, 3 deletions

diff --git a/src/core/hle/service/hid/controllers/mouse.cpp b/src/core/hle/service/hid/controllers/mouse.cpp
index 9c408e7f4..ba79888ae 100644
--- a/src/core/hle/service/hid/controllers/mouse.cpp
+++ b/src/core/hle/service/hid/controllers/mouse.cpp
@@ -38,15 +38,16 @@ void Controller_Mouse::OnUpdate(const Core::Timing::CoreTiming& core_timing, u8*
     if (Settings::values.mouse_enabled) {
         const auto& mouse_button_state = emulated_devices->GetMouseButtons();
         const auto& mouse_position_state = emulated_devices->GetMousePosition();
-        const auto& mouse_wheel_state = emulated_devices->GetMouseDeltaWheel();
+        const auto& mouse_wheel_state = emulated_devices->GetMouseWheel();
         next_state.attribute.is_connected.Assign(1);
         next_state.x = static_cast<s32>(mouse_position_state.x * Layout::ScreenUndocked::Width);
         next_state.y = static_cast<s32>(mouse_position_state.y * Layout::ScreenUndocked::Height);
         next_state.delta_x = next_state.x - last_entry.x;
         next_state.delta_y = next_state.y - last_entry.y;
-        next_state.delta_wheel_x = mouse_wheel_state.x;
-        next_state.delta_wheel_y = mouse_wheel_state.y;
+        next_state.delta_wheel_x = mouse_wheel_state.x - last_mouse_wheel_state.x;
+        next_state.delta_wheel_y = mouse_wheel_state.y - last_mouse_wheel_state.y;
 
+        last_mouse_wheel_state = mouse_wheel_state;
         next_state.button = mouse_button_state;
     }