4 files changed, 99 insertions, 65 deletions

diff --git a/src/input_common/gcadapter/gc_poller.cpp b/src/input_common/gcadapter/gc_poller.cpp
index 4d1052414..9670bdeb2 100644
--- a/src/input_common/gcadapter/gc_poller.cpp
+++ b/src/input_common/gcadapter/gc_poller.cpp
@@ -139,10 +139,10 @@ void GCButtonFactory::EndConfiguration() {
 
 class GCAnalog final : public Input::AnalogDevice {
 public:
-    explicit GCAnalog(u32 port_, u32 axis_x_, u32 axis_y_, float deadzone_,
-                      const GCAdapter::Adapter* adapter, float range_)
-        : port(port_), axis_x(axis_x_), axis_y(axis_y_), deadzone(deadzone_), gcadapter(adapter),
-          range(range_) {}
+    explicit GCAnalog(u32 port_, u32 axis_x_, u32 axis_y_, bool invert_x_, bool invert_y_,
+                      float deadzone_, float range_, const GCAdapter::Adapter* adapter)
+        : port(port_), axis_x(axis_x_), axis_y(axis_y_), invert_x(invert_x_), invert_y(invert_y_),
+          deadzone(deadzone_), range(range_), gcadapter(adapter) {}
 
     float GetAxis(u32 axis) const {
         if (gcadapter->DeviceConnected(port)) {
@@ -157,7 +157,12 @@ public:
     std::pair<float, float> GetAnalog(u32 analog_axis_x, u32 analog_axis_y) const {
         float x = GetAxis(analog_axis_x);
         float y = GetAxis(analog_axis_y);
-
+        if (invert_x) {
+            x = -x;
+        }
+        if (invert_y) {
+            y = -y;
+        }
         // Make sure the coordinates are in the unit circle,
         // otherwise normalize it.
         float r = x * x + y * y;
@@ -200,9 +205,11 @@ private:
     const u32 port;
     const u32 axis_x;
     const u32 axis_y;
+    const bool invert_x;
+    const bool invert_y;
     const float deadzone;
-    const GCAdapter::Adapter* gcadapter;
     const float range;
+    const GCAdapter::Adapter* gcadapter;
     mutable std::mutex mutex;
 };
 
@@ -223,8 +230,13 @@ std::unique_ptr<Input::AnalogDevice> GCAnalogFactory::Create(const Common::Param
     const auto axis_y = static_cast<u32>(params.Get("axis_y", 1));
     const auto deadzone = std::clamp(params.Get("deadzone", 0.0f), 0.0f, 1.0f);
     const auto range = std::clamp(params.Get("range", 1.0f), 0.50f, 1.50f);
+    const std::string invert_x_value = params.Get("invert_x", "+");
+    const std::string invert_y_value = params.Get("invert_y", "+");
+    const bool invert_x = invert_x_value == "-";
+    const bool invert_y = invert_y_value == "-";
 
-    return std::make_unique<GCAnalog>(port, axis_x, axis_y, deadzone, adapter.get(), range);
+    return std::make_unique<GCAnalog>(port, axis_x, axis_y, invert_x, invert_y, deadzone, range,
+                                      adapter.get());
 }
 
 void GCAnalogFactory::BeginConfiguration() {
@@ -282,6 +294,8 @@ Common::ParamPackage GCAnalogFactory::GetNextInput() {
         params.Set("port", controller_number);
         params.Set("axis_x", analog_x_axis);
         params.Set("axis_y", analog_y_axis);
+        params.Set("invert_x", "+");
+        params.Set("invert_y", "+");
         analog_x_axis = -1;
         analog_y_axis = -1;
         controller_number = -1;
diff --git a/src/input_common/mouse/mouse_poller.cpp b/src/input_common/mouse/mouse_poller.cpp
index 7445ad3ad..508eb0c7d 100644
--- a/src/input_common/mouse/mouse_poller.cpp
+++ b/src/input_common/mouse/mouse_poller.cpp
@@ -62,10 +62,10 @@ void MouseButtonFactory::EndConfiguration() {
 
 class MouseAnalog final : public Input::AnalogDevice {
 public:
-    explicit MouseAnalog(u32 port_, u32 axis_x_, u32 axis_y_, float deadzone_, float range_,
-                         const MouseInput::Mouse* mouse_input_)
-        : button(port_), axis_x(axis_x_), axis_y(axis_y_), deadzone(deadzone_), range(range_),
-          mouse_input(mouse_input_) {}
+    explicit MouseAnalog(u32 port_, u32 axis_x_, u32 axis_y_, bool invert_x_, bool invert_y_,
+                         float deadzone_, float range_, const MouseInput::Mouse* mouse_input_)
+        : button(port_), axis_x(axis_x_), axis_y(axis_y_), invert_x(invert_x_), invert_y(invert_y_),
+          deadzone(deadzone_), range(range_), mouse_input(mouse_input_) {}
 
     float GetAxis(u32 axis) const {
         std::lock_guard lock{mutex};
@@ -77,6 +77,12 @@ public:
     std::pair<float, float> GetAnalog(u32 analog_axis_x, u32 analog_axis_y) const {
         float x = GetAxis(analog_axis_x);
         float y = GetAxis(analog_axis_y);
+        if (invert_x) {
+            x = -x;
+        }
+        if (invert_y) {
+            y = -y;
+        }
 
         // Make sure the coordinates are in the unit circle,
         // otherwise normalize it.
@@ -104,6 +110,8 @@ private:
     const u32 button;
     const u32 axis_x;
     const u32 axis_y;
+    const bool invert_x;
+    const bool invert_y;
     const float deadzone;
     const float range;
     const MouseInput::Mouse* mouse_input;
@@ -128,8 +136,13 @@ std::unique_ptr<Input::AnalogDevice> MouseAnalogFactory::Create(
     const auto axis_y = static_cast<u32>(params.Get("axis_y", 1));
     const auto deadzone = std::clamp(params.Get("deadzone", 0.0f), 0.0f, 1.0f);
     const auto range = std::clamp(params.Get("range", 1.0f), 0.50f, 1.50f);
+    const std::string invert_x_value = params.Get("invert_x", "+");
+    const std::string invert_y_value = params.Get("invert_y", "+");
+    const bool invert_x = invert_x_value == "-";
+    const bool invert_y = invert_y_value == "-";
 
-    return std::make_unique<MouseAnalog>(port, axis_x, axis_y, deadzone, range, mouse_input.get());
+    return std::make_unique<MouseAnalog>(port, axis_x, axis_y, invert_x, invert_y, deadzone, range,
+                                         mouse_input.get());
 }
 
 void MouseAnalogFactory::BeginConfiguration() {
@@ -153,6 +166,8 @@ Common::ParamPackage MouseAnalogFactory::GetNextInput() const {
             params.Set("port", static_cast<u16>(pad.button));
             params.Set("axis_x", 0);
             params.Set("axis_y", 1);
+            params.Set("invert_x", "+");
+            params.Set("invert_y", "+");
             return params;
         }
     }
diff --git a/src/input_common/sdl/sdl_impl.cpp b/src/input_common/sdl/sdl_impl.cpp
index 7827e324c..0b531f698 100644
--- a/src/input_common/sdl/sdl_impl.cpp
+++ b/src/input_common/sdl/sdl_impl.cpp
@@ -352,13 +352,20 @@ private:
 class SDLAnalog final : public Input::AnalogDevice {
 public:
     explicit SDLAnalog(std::shared_ptr<SDLJoystick> joystick_, int axis_x_, int axis_y_,
-                       float deadzone_, float range_)
-        : joystick(std::move(joystick_)), axis_x(axis_x_), axis_y(axis_y_), deadzone(deadzone_),
-          range(range_) {}
+                       bool invert_x_, bool invert_y_, float deadzone_, float range_)
+        : joystick(std::move(joystick_)), axis_x(axis_x_), axis_y(axis_y_), invert_x(invert_x_),
+          invert_y(invert_y_), deadzone(deadzone_), range(range_) {}
 
     std::tuple<float, float> GetStatus() const override {
-        const auto [x, y] = joystick->GetAnalog(axis_x, axis_y, range);
+        auto [x, y] = joystick->GetAnalog(axis_x, axis_y, range);
         const float r = std::sqrt((x * x) + (y * y));
+        if (invert_x) {
+            x = -x;
+        }
+        if (invert_y) {
+            y = -y;
+        }
+
         if (r > deadzone) {
             return std::make_tuple(x / r * (r - deadzone) / (1 - deadzone),
                                    y / r * (r - deadzone) / (1 - deadzone));
@@ -386,6 +393,8 @@ private:
     std::shared_ptr<SDLJoystick> joystick;
     const int axis_x;
     const int axis_y;
+    const bool invert_x;
+    const bool invert_y;
     const float deadzone;
     const float range;
 };
@@ -572,12 +581,17 @@ public:
         const int axis_y = params.Get("axis_y", 1);
         const float deadzone = std::clamp(params.Get("deadzone", 0.0f), 0.0f, 1.0f);
         const float range = std::clamp(params.Get("range", 1.0f), 0.50f, 1.50f);
+        const std::string invert_x_value = params.Get("invert_x", "+");
+        const std::string invert_y_value = params.Get("invert_y", "+");
+        const bool invert_x = invert_x_value == "-";
+        const bool invert_y = invert_y_value == "-";
         auto joystick = state.GetSDLJoystickByGUID(guid, port);
 
         // This is necessary so accessing GetAxis with axis_x and axis_y won't crash
         joystick->SetAxis(axis_x, 0);
         joystick->SetAxis(axis_y, 0);
-        return std::make_unique<SDLAnalog>(joystick, axis_x, axis_y, deadzone, range);
+        return std::make_unique<SDLAnalog>(joystick, axis_x, axis_y, invert_x, invert_y, deadzone,
+                                           range);
     }
 
 private:
@@ -886,6 +900,8 @@ Common::ParamPackage BuildParamPackageForAnalog(int port, const std::string& gui
     params.Set("guid", guid);
     params.Set("axis_x", axis_x);
     params.Set("axis_y", axis_y);
+    params.Set("invert_x", "+");
+    params.Set("invert_y", "+");
     return params;
 }
 } // Anonymous namespace
diff --git a/src/yuzu/configuration/configure_input_player.cpp b/src/yuzu/configuration/configure_input_player.cpp
index f9915fb7a..3c7500ee3 100644
--- a/src/yuzu/configuration/configure_input_player.cpp
+++ b/src/yuzu/configuration/configure_input_player.cpp
@@ -173,61 +173,31 @@ QString AnalogToText(const Common::ParamPackage& param, const std::string& dir)
         return ButtonToText(Common::ParamPackage{param.Get(dir, "")});
     }
 
-    if (param.Get("engine", "") == "sdl") {
+    const auto engine_str = param.Get("engine", "");
+    const QString axis_x_str = QString::fromStdString(param.Get("axis_x", ""));
+    const QString axis_y_str = QString::fromStdString(param.Get("axis_y", ""));
+    const bool invert_x = param.Get("invert_x", "+") == "-";
+    const bool invert_y = param.Get("invert_y", "+") == "-";
+    if (engine_str == "sdl" || engine_str == "gcpad" || engine_str == "mouse") {
         if (dir == "modifier") {
             return QObject::tr("[unused]");
         }
 
-        if (dir == "left" || dir == "right") {
-            const QString axis_x_str = QString::fromStdString(param.Get("axis_x", ""));
-
-            return QObject::tr("Axis %1").arg(axis_x_str);
-        }
-
-        if (dir == "up" || dir == "down") {
-            const QString axis_y_str = QString::fromStdString(param.Get("axis_y", ""));
-
-            return QObject::tr("Axis %1").arg(axis_y_str);
+        if (dir == "left") {
+            const QString invert_x_str = QString::fromStdString(invert_x ? "+" : "-");
+            return QObject::tr("Axis %1%2").arg(axis_x_str, invert_x_str);
         }
-
-        return {};
-    }
-
-    if (param.Get("engine", "") == "gcpad") {
-        if (dir == "modifier") {
-            return QObject::tr("[unused]");
+        if (dir == "right") {
+            const QString invert_x_str = QString::fromStdString(invert_x ? "-" : "+");
+            return QObject::tr("Axis %1%2").arg(axis_x_str, invert_x_str);
         }
-
-        if (dir == "left" || dir == "right") {
-            const QString axis_x_str = QString::fromStdString(param.Get("axis_x", ""));
-
-            return QObject::tr("GC Axis %1").arg(axis_x_str);
+        if (dir == "up") {
+            const QString invert_y_str = QString::fromStdString(invert_y ? "-" : "+");
+            return QObject::tr("Axis %1%2").arg(axis_y_str, invert_y_str);
         }
-
-        if (dir == "up" || dir == "down") {
-            const QString axis_y_str = QString::fromStdString(param.Get("axis_y", ""));
-
-            return QObject::tr("GC Axis %1").arg(axis_y_str);
-        }
-
-        return {};
-    }
-
-    if (param.Get("engine", "") == "mouse") {
-        if (dir == "modifier") {
-            return QObject::tr("[unused]");
-        }
-
-        if (dir == "left" || dir == "right") {
-            const QString axis_x_str = QString::fromStdString(param.Get("axis_x", ""));
-
-            return QObject::tr("Mouse %1").arg(axis_x_str);
-        }
-
-        if (dir == "up" || dir == "down") {
-            const QString axis_y_str = QString::fromStdString(param.Get("axis_y", ""));
-
-            return QObject::tr("Mouse %1").arg(axis_y_str);
+        if (dir == "down") {
+            const QString invert_y_str = QString::fromStdString(invert_y ? "+" : "-");
+            return QObject::tr("Axis %1%2").arg(axis_y_str, invert_y_str);
         }
 
         return {};
@@ -396,6 +366,25 @@ ConfigureInputPlayer::ConfigureInputPlayer(QWidget* parent, std::size_t player_i
                             analogs_param[analog_id].Clear();
                             analog_map_buttons[analog_id][sub_button_id]->setText(tr("[not set]"));
                         });
+                        context_menu.addAction(tr("Invert axis"), [&] {
+                            if (sub_button_id == 2 || sub_button_id == 3) {
+                                const bool invert_value =
+                                    analogs_param[analog_id].Get("invert_x", "+") == "-";
+                                const std::string invert_str = invert_value ? "+" : "-";
+                                analogs_param[analog_id].Set("invert_x", invert_str);
+                            }
+                            if (sub_button_id == 0 || sub_button_id == 1) {
+                                const bool invert_value =
+                                    analogs_param[analog_id].Get("invert_y", "+") == "-";
+                                const std::string invert_str = invert_value ? "+" : "-";
+                                analogs_param[analog_id].Set("invert_y", invert_str);
+                            }
+                            for (int sub_button_id = 0; sub_button_id < ANALOG_SUB_BUTTONS_NUM;
+                                 ++sub_button_id) {
+                                analog_map_buttons[analog_id][sub_button_id]->setText(AnalogToText(
+                                    analogs_param[analog_id], analog_sub_buttons[sub_button_id]));
+                            }
+                        });
                         context_menu.exec(analog_map_buttons[analog_id][sub_button_id]->mapToGlobal(
                             menu_location));
                     });