2 files changed, 215 insertions, 0 deletions

diff --git a/src/input_common/drivers/mouse.cpp b/src/input_common/drivers/mouse.cpp
new file mode 100644
index 000000000..2c2432fb7
--- /dev/null
+++ b/src/input_common/drivers/mouse.cpp
@@ -0,0 +1,138 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included
+
+#include <stop_token>
+#include <thread>
+#include <fmt/format.h>
+
+#include "common/param_package.h"
+#include "common/settings.h"
+#include "common/thread.h"
+#include "input_common/drivers/mouse.h"
+
+namespace InputCommon {
+constexpr int touch_axis_x = 10;
+constexpr int touch_axis_y = 11;
+
+Mouse::Mouse(const std::string input_engine_) : InputEngine(input_engine_) {
+    PreSetController(identifier);
+    update_thread = std::jthread([this](std::stop_token stop_token) { UpdateThread(stop_token); });
+}
+
+void Mouse::UpdateThread(std::stop_token stop_token) {
+    Common::SetCurrentThreadName("yuzu:input:Mouse");
+    constexpr int update_time = 10;
+    while (!stop_token.stop_requested()) {
+        if (Settings::values.mouse_panning) {
+            // Slow movement by 4%
+            last_mouse_change *= 0.96f;
+            const float sensitivity =
+                Settings::values.mouse_panning_sensitivity.GetValue() * 0.022f;
+            SetAxis(identifier, 0, last_mouse_change.x * sensitivity);
+            SetAxis(identifier, 1, -last_mouse_change.y * sensitivity);
+        }
+
+        if (mouse_panning_timout++ > 20) {
+            StopPanning();
+        }
+        std::this_thread::sleep_for(std::chrono::milliseconds(update_time));
+    }
+}
+
+void Mouse::MouseMove(int x, int y, f32 touch_x, f32 touch_y, int center_x, int center_y) {
+    SetAxis(identifier, touch_axis_x, touch_x);
+    SetAxis(identifier, touch_axis_y, touch_y);
+
+    if (Settings::values.mouse_panning) {
+        auto mouse_change =
+            (Common::MakeVec(x, y) - Common::MakeVec(center_x, center_y)).Cast<float>();
+        mouse_panning_timout = 0;
+
+        const auto move_distance = mouse_change.Length();
+        if (move_distance == 0) {
+            return;
+        }
+
+        // Make slow movements at least 3 units on lenght
+        if (move_distance < 3.0f) {
+            // Normalize value
+            mouse_change /= move_distance;
+            mouse_change *= 3.0f;
+        }
+
+        // Average mouse movements
+        last_mouse_change = (last_mouse_change * 0.91f) + (mouse_change * 0.09f);
+
+        const auto last_move_distance = last_mouse_change.Length();
+
+        // Make fast movements clamp to 8 units on lenght
+        if (last_move_distance > 8.0f) {
+            // Normalize value
+            last_mouse_change /= last_move_distance;
+            last_mouse_change *= 8.0f;
+        }
+
+        // Ignore average if it's less than 1 unit and use current movement value
+        if (last_move_distance < 1.0f) {
+            last_mouse_change = mouse_change / mouse_change.Length();
+        }
+
+        return;
+    }
+
+    if (button_pressed) {
+        const auto mouse_move = Common::MakeVec<int>(x, y) - mouse_origin;
+        const float sensitivity = Settings::values.mouse_panning_sensitivity.GetValue() * 0.0012f;
+        SetAxis(identifier, 0, static_cast<float>(mouse_move.x) * sensitivity);
+        SetAxis(identifier, 1, static_cast<float>(-mouse_move.y) * sensitivity);
+    }
+}
+
+void Mouse::PressButton(int x, int y, f32 touch_x, f32 touch_y, MouseButton button) {
+    SetAxis(identifier, touch_axis_x, touch_x);
+    SetAxis(identifier, touch_axis_y, touch_y);
+    SetButton(identifier, static_cast<int>(button), true);
+    // Set initial analog parameters
+    mouse_origin = {x, y};
+    last_mouse_position = {x, y};
+    button_pressed = true;
+}
+
+void Mouse::ReleaseButton(MouseButton button) {
+    SetButton(identifier, static_cast<int>(button), false);
+
+    if (!Settings::values.mouse_panning) {
+        SetAxis(identifier, 0, 0);
+        SetAxis(identifier, 1, 0);
+    }
+    button_pressed = false;
+}
+
+void Mouse::ReleaseAllButtons() {
+    ResetButtonState();
+    button_pressed = false;
+}
+
+void Mouse::StopPanning() {
+    last_mouse_change = {};
+}
+
+std::vector<Common::ParamPackage> Mouse::GetInputDevices() const {
+    std::vector<Common::ParamPackage> devices;
+    devices.emplace_back(Common::ParamPackage{
+        {"engine", "keyboard"},
+        {"display", "Keyboard/Mouse"},
+    });
+    return devices;
+}
+
+std::string Mouse::GetUIName(const Common::ParamPackage& params) const {
+    if (params.Has("button")) {
+        return fmt::format("Mouse {}", params.Get("button", 0));
+    }
+
+    return "Bad Mouse";
+}
+
+} // namespace InputCommon
diff --git a/src/input_common/drivers/mouse.h b/src/input_common/drivers/mouse.h
new file mode 100644
index 000000000..e8355751a
--- /dev/null
+++ b/src/input_common/drivers/mouse.h
@@ -0,0 +1,77 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included
+
+#pragma once
+
+#include <stop_token>
+#include <thread>
+
+#include "common/vector_math.h"
+#include "input_common/input_engine.h"
+
+namespace InputCommon {
+
+enum class MouseButton {
+    Left,
+    Right,
+    Wheel,
+    Backward,
+    Forward,
+    Task,
+    Extra,
+    Undefined,
+};
+
+/**
+ * A button device factory representing a keyboard. It receives keyboard events and forward them
+ * to all button devices it created.
+ */
+class Mouse final : public InputCommon::InputEngine {
+public:
+    explicit Mouse(const std::string input_engine_);
+
+    /**
+     * Signals that mouse has moved.
+     * @param x the x-coordinate of the cursor
+     * @param y the y-coordinate of the cursor
+     * @param center_x the x-coordinate of the middle of the screen
+     * @param center_y the y-coordinate of the middle of the screen
+     */
+    void MouseMove(int x, int y, f32 touch_x, f32 touch_y, int center_x, int center_y);
+
+    /**
+     * Sets the status of all buttons bound with the key to pressed
+     * @param key_code the code of the key to press
+     */
+    void PressButton(int x, int y, f32 touch_x, f32 touch_y, MouseButton button);
+
+    /**
+     * Sets the status of all buttons bound with the key to released
+     * @param key_code the code of the key to release
+     */
+    void ReleaseButton(MouseButton button);
+
+    void ReleaseAllButtons();
+
+    std::vector<Common::ParamPackage> GetInputDevices() const override;
+    std::string GetUIName(const Common::ParamPackage& params) const override;
+
+private:
+    void UpdateThread(std::stop_token stop_token);
+    void StopPanning();
+
+    const PadIdentifier identifier = {
+        .guid = Common::UUID{""},
+        .port = 0,
+        .pad = 0,
+    };
+    Common::Vec2<int> mouse_origin;
+    Common::Vec2<int> last_mouse_position;
+    Common::Vec2<float> last_mouse_change;
+    bool button_pressed;
+    int mouse_panning_timout{};
+    std::jthread update_thread;
+};
+
+} // namespace InputCommon