hid_core: Move hid to it's own subproject

src/hid_core/resources/touch_screen/gesture.cpp

@@ -0,0 +1,366 @@
+// SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "common/math_util.h"
+#include "common/settings.h"
+#include "core/frontend/emu_window.h"
+#include "hid_core/frontend/emulated_console.h"
+#include "hid_core/hid_core.h"
+#include "hid_core/resources/applet_resource.h"
+#include "hid_core/resources/shared_memory_format.h"
+#include "hid_core/resources/touch_screen/gesture.h"
+
+namespace Service::HID {
+// HW is around 700, value is set to 400 to make it easier to trigger with mouse
+constexpr f32 swipe_threshold = 400.0f; // Threshold in pixels/s
+constexpr f32 angle_threshold = 0.015f; // Threshold in radians
+constexpr f32 pinch_threshold = 0.5f;   // Threshold in pixels
+constexpr f32 press_delay = 0.5f;       // Time in seconds
+constexpr f32 double_tap_delay = 0.35f; // Time in seconds
+
+constexpr f32 Square(s32 num) {
+    return static_cast<f32>(num * num);
+}
+
+Gesture::Gesture(Core::HID::HIDCore& hid_core_) : ControllerBase(hid_core_) {
+    console = hid_core.GetEmulatedConsole();
+}
+Gesture::~Gesture() = default;
+
+void Gesture::OnInit() {
+    std::scoped_lock shared_lock{*shared_mutex};
+    const u64 aruid = applet_resource->GetActiveAruid();
+    auto* data = applet_resource->GetAruidData(aruid);
+
+    if (data == nullptr || !data->flag.is_assigned) {
+        return;
+    }
+
+    shared_memory = &data->shared_memory_format->gesture;
+    shared_memory->gesture_lifo.buffer_count = 0;
+    shared_memory->gesture_lifo.buffer_tail = 0;
+    force_update = true;
+}
+
+void Gesture::OnRelease() {}
+
+void Gesture::OnUpdate(const Core::Timing::CoreTiming& core_timing) {
+    std::scoped_lock shared_lock{*shared_mutex};
+    const u64 aruid = applet_resource->GetActiveAruid();
+    auto* data = applet_resource->GetAruidData(aruid);
+
+    if (data == nullptr || !data->flag.is_assigned) {
+        return;
+    }
+
+    shared_memory = &data->shared_memory_format->gesture;
+
+    if (!IsControllerActivated()) {
+        shared_memory->gesture_lifo.buffer_count = 0;
+        shared_memory->gesture_lifo.buffer_tail = 0;
+        return;
+    }
+
+    ReadTouchInput();
+
+    GestureProperties gesture = GetGestureProperties();
+    f32 time_difference =
+        static_cast<f32>(shared_memory->gesture_lifo.timestamp - last_update_timestamp) /
+        (1000 * 1000 * 1000);
+
+    // Only update if necessary
+    if (!ShouldUpdateGesture(gesture, time_difference)) {
+        return;
+    }
+
+    last_update_timestamp = shared_memory->gesture_lifo.timestamp;
+    UpdateGestureSharedMemory(gesture, time_difference);
+}
+
+void Gesture::ReadTouchInput() {
+    if (!Settings::values.touchscreen.enabled) {
+        fingers = {};
+        return;
+    }
+
+    const auto touch_status = console->GetTouch();
+    for (std::size_t id = 0; id < fingers.size(); ++id) {
+        fingers[id] = touch_status[id];
+    }
+}
+
+bool Gesture::ShouldUpdateGesture(const GestureProperties& gesture, f32 time_difference) {
+    const auto& last_entry = GetLastGestureEntry();
+    if (force_update) {
+        force_update = false;
+        return true;
+    }
+
+    // Update if coordinates change
+    for (size_t id = 0; id < MAX_POINTS; id++) {
+        if (gesture.points[id] != last_gesture.points[id]) {
+            return true;
+        }
+    }
+
+    // Update on press and hold event after 0.5 seconds
+    if (last_entry.type == GestureType::Touch && last_entry.point_count == 1 &&
+        time_difference > press_delay) {
+        return enable_press_and_tap;
+    }
+
+    return false;
+}
+
+void Gesture::UpdateGestureSharedMemory(GestureProperties& gesture, f32 time_difference) {
+    GestureType type = GestureType::Idle;
+    GestureAttribute attributes{};
+
+    const auto& last_entry = shared_memory->gesture_lifo.ReadCurrentEntry().state;
+
+    // Reset next state to default
+    next_state.sampling_number = last_entry.sampling_number + 1;
+    next_state.delta = {};
+    next_state.vel_x = 0;
+    next_state.vel_y = 0;
+    next_state.direction = GestureDirection::None;
+    next_state.rotation_angle = 0;
+    next_state.scale = 0;
+
+    if (gesture.active_points > 0) {
+        if (last_gesture.active_points == 0) {
+            NewGesture(gesture, type, attributes);
+        } else {
+            UpdateExistingGesture(gesture, type, time_difference);
+        }
+    } else {
+        EndGesture(gesture, last_gesture, type, attributes, time_difference);
+    }
+
+    // Apply attributes
+    next_state.detection_count = gesture.detection_count;
+    next_state.type = type;
+    next_state.attributes = attributes;
+    next_state.pos = gesture.mid_point;
+    next_state.point_count = static_cast<s32>(gesture.active_points);
+    next_state.points = gesture.points;
+    last_gesture = gesture;
+
+    shared_memory->gesture_lifo.WriteNextEntry(next_state);
+}
+
+void Gesture::NewGesture(GestureProperties& gesture, GestureType& type,
+                         GestureAttribute& attributes) {
+    const auto& last_entry = GetLastGestureEntry();
+
+    gesture.detection_count++;
+    type = GestureType::Touch;
+
+    // New touch after cancel is not considered new
+    if (last_entry.type != GestureType::Cancel) {
+        attributes.is_new_touch.Assign(1);
+        enable_press_and_tap = true;
+    }
+}
+
+void Gesture::UpdateExistingGesture(GestureProperties& gesture, GestureType& type,
+                                    f32 time_difference) {
+    const auto& last_entry = GetLastGestureEntry();
+
+    // Promote to pan type if touch moved
+    for (size_t id = 0; id < MAX_POINTS; id++) {
+        if (gesture.points[id] != last_gesture.points[id]) {
+            type = GestureType::Pan;
+            break;
+        }
+    }
+
+    // Number of fingers changed cancel the last event and clear data
+    if (gesture.active_points != last_gesture.active_points) {
+        type = GestureType::Cancel;
+        enable_press_and_tap = false;
+        gesture.active_points = 0;
+        gesture.mid_point = {};
+        gesture.points.fill({});
+        return;
+    }
+
+    // Calculate extra parameters of panning
+    if (type == GestureType::Pan) {
+        UpdatePanEvent(gesture, last_gesture, type, time_difference);
+        return;
+    }
+
+    // Promote to press type
+    if (last_entry.type == GestureType::Touch) {
+        type = GestureType::Press;
+    }
+}
+
+void Gesture::EndGesture(GestureProperties& gesture, GestureProperties& last_gesture_props,
+                         GestureType& type, GestureAttribute& attributes, f32 time_difference) {
+    const auto& last_entry = GetLastGestureEntry();
+
+    if (last_gesture_props.active_points != 0) {
+        switch (last_entry.type) {
+        case GestureType::Touch:
+            if (enable_press_and_tap) {
+                SetTapEvent(gesture, last_gesture_props, type, attributes);
+                return;
+            }
+            type = GestureType::Cancel;
+            force_update = true;
+            break;
+        case GestureType::Press:
+        case GestureType::Tap:
+        case GestureType::Swipe:
+        case GestureType::Pinch:
+        case GestureType::Rotate:
+            type = GestureType::Complete;
+            force_update = true;
+            break;
+        case GestureType::Pan:
+            EndPanEvent(gesture, last_gesture_props, type, time_difference);
+            break;
+        default:
+            break;
+        }
+        return;
+    }
+    if (last_entry.type == GestureType::Complete || last_entry.type == GestureType::Cancel) {
+        gesture.detection_count++;
+    }
+}
+
+void Gesture::SetTapEvent(GestureProperties& gesture, GestureProperties& last_gesture_props,
+                          GestureType& type, GestureAttribute& attributes) {
+    type = GestureType::Tap;
+    gesture = last_gesture_props;
+    force_update = true;
+    f32 tap_time_difference =
+        static_cast<f32>(last_update_timestamp - last_tap_timestamp) / (1000 * 1000 * 1000);
+    last_tap_timestamp = last_update_timestamp;
+    if (tap_time_difference < double_tap_delay) {
+        attributes.is_double_tap.Assign(1);
+    }
+}
+
+void Gesture::UpdatePanEvent(GestureProperties& gesture, GestureProperties& last_gesture_props,
+                             GestureType& type, f32 time_difference) {
+    const auto& last_entry = GetLastGestureEntry();
+
+    next_state.delta = gesture.mid_point - last_entry.pos;
+    next_state.vel_x = static_cast<f32>(next_state.delta.x) / time_difference;
+    next_state.vel_y = static_cast<f32>(next_state.delta.y) / time_difference;
+    last_pan_time_difference = time_difference;
+
+    // Promote to pinch type
+    if (std::abs(gesture.average_distance - last_gesture_props.average_distance) >
+        pinch_threshold) {
+        type = GestureType::Pinch;
+        next_state.scale = gesture.average_distance / last_gesture_props.average_distance;
+    }
+
+    const f32 angle_between_two_lines = std::atan((gesture.angle - last_gesture_props.angle) /
+                                                  (1 + (gesture.angle * last_gesture_props.angle)));
+    // Promote to rotate type
+    if (std::abs(angle_between_two_lines) > angle_threshold) {
+        type = GestureType::Rotate;
+        next_state.scale = 0;
+        next_state.rotation_angle = angle_between_two_lines * 180.0f / Common::PI;
+    }
+}
+
+void Gesture::EndPanEvent(GestureProperties& gesture, GestureProperties& last_gesture_props,
+                          GestureType& type, f32 time_difference) {
+    const auto& last_entry = GetLastGestureEntry();
+    next_state.vel_x =
+        static_cast<f32>(last_entry.delta.x) / (last_pan_time_difference + time_difference);
+    next_state.vel_y =
+        static_cast<f32>(last_entry.delta.y) / (last_pan_time_difference + time_difference);
+    const f32 curr_vel =
+        std::sqrt((next_state.vel_x * next_state.vel_x) + (next_state.vel_y * next_state.vel_y));
+
+    // Set swipe event with parameters
+    if (curr_vel > swipe_threshold) {
+        SetSwipeEvent(gesture, last_gesture_props, type);
+        return;
+    }
+
+    // End panning without swipe
+    type = GestureType::Complete;
+    next_state.vel_x = 0;
+    next_state.vel_y = 0;
+    force_update = true;
+}
+
+void Gesture::SetSwipeEvent(GestureProperties& gesture, GestureProperties& last_gesture_props,
+                            GestureType& type) {
+    const auto& last_entry = GetLastGestureEntry();
+
+    type = GestureType::Swipe;
+    gesture = last_gesture_props;
+    force_update = true;
+    next_state.delta = last_entry.delta;
+
+    if (std::abs(next_state.delta.x) > std::abs(next_state.delta.y)) {
+        if (next_state.delta.x > 0) {
+            next_state.direction = GestureDirection::Right;
+            return;
+        }
+        next_state.direction = GestureDirection::Left;
+        return;
+    }
+    if (next_state.delta.y > 0) {
+        next_state.direction = GestureDirection::Down;
+        return;
+    }
+    next_state.direction = GestureDirection::Up;
+}
+
+const GestureState& Gesture::GetLastGestureEntry() const {
+    return shared_memory->gesture_lifo.ReadCurrentEntry().state;
+}
+
+GestureProperties Gesture::GetGestureProperties() {
+    GestureProperties gesture;
+    std::array<Core::HID::TouchFinger, MAX_POINTS> active_fingers;
+    const auto end_iter = std::copy_if(fingers.begin(), fingers.end(), active_fingers.begin(),
+                                       [](const auto& finger) { return finger.pressed; });
+    gesture.active_points =
+        static_cast<std::size_t>(std::distance(active_fingers.begin(), end_iter));
+
+    for (size_t id = 0; id < gesture.active_points; ++id) {
+        const auto& [active_x, active_y] = active_fingers[id].position;
+        gesture.points[id] = {
+            .x = static_cast<s32>(active_x * Layout::ScreenUndocked::Width),
+            .y = static_cast<s32>(active_y * Layout::ScreenUndocked::Height),
+        };
+
+        // Hack: There is no touch in docked but games still allow it
+        if (Settings::IsDockedMode()) {
+            gesture.points[id] = {
+                .x = static_cast<s32>(active_x * Layout::ScreenDocked::Width),
+                .y = static_cast<s32>(active_y * Layout::ScreenDocked::Height),
+            };
+        }
+
+        gesture.mid_point.x += static_cast<s32>(gesture.points[id].x / gesture.active_points);
+        gesture.mid_point.y += static_cast<s32>(gesture.points[id].y / gesture.active_points);
+    }
+
+    for (size_t id = 0; id < gesture.active_points; ++id) {
+        const f32 distance = std::sqrt(Square(gesture.mid_point.x - gesture.points[id].x) +
+                                       Square(gesture.mid_point.y - gesture.points[id].y));
+        gesture.average_distance += distance / static_cast<f32>(gesture.active_points);
+    }
+
+    gesture.angle = std::atan2(static_cast<f32>(gesture.mid_point.y - gesture.points[0].y),
+                               static_cast<f32>(gesture.mid_point.x - gesture.points[0].x));
+
+    gesture.detection_count = last_gesture.detection_count;
+
+    return gesture;
+}
+
+} // namespace Service::HID

src/hid_core/resources/touch_screen/gesture.h

@@ -0,0 +1,87 @@
+// SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <array>
+
+#include "common/common_types.h"
+#include "hid_core/resources/controller_base.h"
+#include "hid_core/resources/touch_screen/touch_types.h"
+
+namespace Core::HID {
+class EmulatedConsole;
+}
+
+namespace Service::HID {
+struct GestureSharedMemoryFormat;
+
+class Gesture final : public ControllerBase {
+public:
+    explicit Gesture(Core::HID::HIDCore& hid_core_);
+    ~Gesture() override;
+
+    // Called when the controller is initialized
+    void OnInit() override;
+
+    // When the controller is released
+    void OnRelease() override;
+
+    // When the controller is requesting an update for the shared memory
+    void OnUpdate(const Core::Timing::CoreTiming& core_timing) override;
+
+private:
+    // Reads input from all available input engines
+    void ReadTouchInput();
+
+    // Returns true if gesture state needs to be updated
+    bool ShouldUpdateGesture(const GestureProperties& gesture, f32 time_difference);
+
+    // Updates the shared memory to the next state
+    void UpdateGestureSharedMemory(GestureProperties& gesture, f32 time_difference);
+
+    // Initializes new gesture
+    void NewGesture(GestureProperties& gesture, GestureType& type, GestureAttribute& attributes);
+
+    // Updates existing gesture state
+    void UpdateExistingGesture(GestureProperties& gesture, GestureType& type, f32 time_difference);
+
+    // Terminates exiting gesture
+    void EndGesture(GestureProperties& gesture, GestureProperties& last_gesture_props,
+                    GestureType& type, GestureAttribute& attributes, f32 time_difference);
+
+    // Set current event to a tap event
+    void SetTapEvent(GestureProperties& gesture, GestureProperties& last_gesture_props,
+                     GestureType& type, GestureAttribute& attributes);
+
+    // Calculates and set the extra parameters related to a pan event
+    void UpdatePanEvent(GestureProperties& gesture, GestureProperties& last_gesture_props,
+                        GestureType& type, f32 time_difference);
+
+    // Terminates the pan event
+    void EndPanEvent(GestureProperties& gesture, GestureProperties& last_gesture_props,
+                     GestureType& type, f32 time_difference);
+
+    // Set current event to a swipe event
+    void SetSwipeEvent(GestureProperties& gesture, GestureProperties& last_gesture_props,
+                       GestureType& type);
+
+    // Retrieves the last gesture entry, as indicated by shared memory indices.
+    [[nodiscard]] const GestureState& GetLastGestureEntry() const;
+
+    // Returns the average distance, angle and middle point of the active fingers
+    GestureProperties GetGestureProperties();
+
+    GestureState next_state{};
+    GestureSharedMemoryFormat* shared_memory;
+    Core::HID::EmulatedConsole* console = nullptr;
+
+    std::array<Core::HID::TouchFinger, MAX_POINTS> fingers{};
+    GestureProperties last_gesture{};
+    s64 last_update_timestamp{};
+    s64 last_tap_timestamp{};
+    f32 last_pan_time_difference{};
+    bool force_update{false};
+    bool enable_press_and_tap{false};
+};
+} // namespace Service::HID

src/hid_core/resources/touch_screen/gesture_types.h

@@ -0,0 +1,77 @@
+// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#pragma once
+
+#include <array>
+#include "common/bit_field.h"
+#include "common/common_types.h"
+#include "common/point.h"
+
+namespace Service::HID {
+static constexpr size_t MAX_FINGERS = 16;
+static constexpr size_t MAX_POINTS = 4;
+
+// This is nn::hid::GestureType
+enum class GestureType : u32 {
+    Idle,     // Nothing touching the screen
+    Complete, // Set at the end of a touch event
+    Cancel,   // Set when the number of fingers change
+    Touch,    // A finger just touched the screen
+    Press,    // Set if last type is touch and the finger hasn't moved
+    Tap,      // Fast press then release
+    Pan,      // All points moving together across the screen
+    Swipe,    // Fast press movement and release of a single point
+    Pinch,    // All points moving away/closer to the midpoint
+    Rotate,   // All points rotating from the midpoint
+};
+
+// This is nn::hid::GestureDirection
+enum class GestureDirection : u32 {
+    None,
+    Left,
+    Up,
+    Right,
+    Down,
+};
+
+// This is nn::hid::GestureAttribute
+struct GestureAttribute {
+    union {
+        u32 raw{};
+
+        BitField<4, 1, u32> is_new_touch;
+        BitField<8, 1, u32> is_double_tap;
+    };
+};
+static_assert(sizeof(GestureAttribute) == 4, "GestureAttribute is an invalid size");
+
+// This is nn::hid::GestureState
+struct GestureState {
+    s64 sampling_number{};
+    s64 detection_count{};
+    GestureType type{GestureType::Idle};
+    GestureDirection direction{GestureDirection::None};
+    Common::Point<s32> pos{};
+    Common::Point<s32> delta{};
+    f32 vel_x{};
+    f32 vel_y{};
+    GestureAttribute attributes{};
+    f32 scale{};
+    f32 rotation_angle{};
+    s32 point_count{};
+    std::array<Common::Point<s32>, 4> points{};
+};
+static_assert(sizeof(GestureState) == 0x60, "GestureState is an invalid size");
+
+struct GestureProperties {
+    std::array<Common::Point<s32>, MAX_POINTS> points{};
+    std::size_t active_points{};
+    Common::Point<s32> mid_point{};
+    s64 detection_count{};
+    u64 delta_time{};
+    f32 average_distance{};
+    f32 angle{};
+};
+
+} // namespace Service::HID

src/hid_core/resources/touch_screen/touch_screen.cpp

@@ -0,0 +1,132 @@
+// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include <algorithm>
+#include "common/common_types.h"
+#include "common/settings.h"
+#include "core/core_timing.h"
+#include "core/frontend/emu_window.h"
+#include "hid_core/frontend/emulated_console.h"
+#include "hid_core/hid_core.h"
+#include "hid_core/resources/applet_resource.h"
+#include "hid_core/resources/shared_memory_format.h"
+#include "hid_core/resources/touch_screen/touch_screen.h"
+
+namespace Service::HID {
+
+TouchScreen::TouchScreen(Core::HID::HIDCore& hid_core_)
+    : ControllerBase{hid_core_}, touchscreen_width(Layout::ScreenUndocked::Width),
+      touchscreen_height(Layout::ScreenUndocked::Height) {
+    console = hid_core.GetEmulatedConsole();
+}
+
+TouchScreen::~TouchScreen() = default;
+
+void TouchScreen::OnInit() {}
+
+void TouchScreen::OnRelease() {}
+
+void TouchScreen::OnUpdate(const Core::Timing::CoreTiming& core_timing) {
+    const u64 aruid = applet_resource->GetActiveAruid();
+    auto* data = applet_resource->GetAruidData(aruid);
+
+    if (data == nullptr || !data->flag.is_assigned) {
+        return;
+    }
+
+    TouchScreenSharedMemoryFormat& shared_memory = data->shared_memory_format->touch_screen;
+    shared_memory.touch_screen_lifo.timestamp = core_timing.GetGlobalTimeNs().count();
+
+    if (!IsControllerActivated()) {
+        shared_memory.touch_screen_lifo.buffer_count = 0;
+        shared_memory.touch_screen_lifo.buffer_tail = 0;
+        return;
+    }
+
+    const auto touch_status = console->GetTouch();
+    for (std::size_t id = 0; id < MAX_FINGERS; id++) {
+        const auto& current_touch = touch_status[id];
+        auto& finger = fingers[id];
+        finger.id = current_touch.id;
+
+        if (finger.attribute.start_touch) {
+            finger.attribute.raw = 0;
+            continue;
+        }
+
+        if (finger.attribute.end_touch) {
+            finger.attribute.raw = 0;
+            finger.pressed = false;
+            continue;
+        }
+
+        if (!finger.pressed && current_touch.pressed) {
+            // Ignore all touch fingers if disabled
+            if (!Settings::values.touchscreen.enabled) {
+                continue;
+            }
+
+            finger.attribute.start_touch.Assign(1);
+            finger.pressed = true;
+            finger.position = current_touch.position;
+            continue;
+        }
+
+        if (finger.pressed && !current_touch.pressed) {
+            finger.attribute.raw = 0;
+            finger.attribute.end_touch.Assign(1);
+            continue;
+        }
+
+        // Only update position if touch is not on a special frame
+        finger.position = current_touch.position;
+    }
+
+    std::array<Core::HID::TouchFinger, MAX_FINGERS> active_fingers;
+    const auto end_iter = std::copy_if(fingers.begin(), fingers.end(), active_fingers.begin(),
+                                       [](const auto& finger) { return finger.pressed; });
+    const auto active_fingers_count =
+        static_cast<std::size_t>(std::distance(active_fingers.begin(), end_iter));
+
+    const u64 timestamp = static_cast<u64>(core_timing.GetGlobalTimeNs().count());
+    const auto& last_entry = shared_memory.touch_screen_lifo.ReadCurrentEntry().state;
+
+    next_state.sampling_number = last_entry.sampling_number + 1;
+    next_state.entry_count = static_cast<s32>(active_fingers_count);
+
+    for (std::size_t id = 0; id < MAX_FINGERS; ++id) {
+        auto& touch_entry = next_state.states[id];
+        if (id < active_fingers_count) {
+            const auto& [active_x, active_y] = active_fingers[id].position;
+            touch_entry.position = {
+                .x = static_cast<u16>(active_x * static_cast<float>(touchscreen_width)),
+                .y = static_cast<u16>(active_y * static_cast<float>(touchscreen_height)),
+            };
+            touch_entry.diameter_x = Settings::values.touchscreen.diameter_x;
+            touch_entry.diameter_y = Settings::values.touchscreen.diameter_y;
+            touch_entry.rotation_angle = Settings::values.touchscreen.rotation_angle;
+            touch_entry.delta_time = timestamp - active_fingers[id].last_touch;
+            fingers[active_fingers[id].id].last_touch = timestamp;
+            touch_entry.finger = active_fingers[id].id;
+            touch_entry.attribute.raw = active_fingers[id].attribute.raw;
+        } else {
+            // Clear touch entry
+            touch_entry.attribute.raw = 0;
+            touch_entry.position = {};
+            touch_entry.diameter_x = 0;
+            touch_entry.diameter_y = 0;
+            touch_entry.rotation_angle = 0;
+            touch_entry.delta_time = 0;
+            touch_entry.finger = 0;
+        }
+    }
+
+    shared_memory.touch_screen_lifo.WriteNextEntry(next_state);
+}
+
+void TouchScreen::SetTouchscreenDimensions(u32 width, u32 height) {
+    touchscreen_width = width;
+    touchscreen_height = height;
+}
+
+} // namespace Service::HID

src/hid_core/resources/touch_screen/touch_screen.h

@@ -0,0 +1,43 @@
+// SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <array>
+
+#include "hid_core/hid_types.h"
+#include "hid_core/resources/controller_base.h"
+#include "hid_core/resources/touch_screen/touch_types.h"
+
+namespace Core::HID {
+class EmulatedConsole;
+} // namespace Core::HID
+
+namespace Service::HID {
+struct TouchScreenSharedMemoryFormat;
+
+class TouchScreen final : public ControllerBase {
+public:
+    explicit TouchScreen(Core::HID::HIDCore& hid_core_);
+    ~TouchScreen() override;
+
+    // Called when the controller is initialized
+    void OnInit() override;
+
+    // When the controller is released
+    void OnRelease() override;
+
+    // When the controller is requesting an update for the shared memory
+    void OnUpdate(const Core::Timing::CoreTiming& core_timing) override;
+
+    void SetTouchscreenDimensions(u32 width, u32 height);
+
+private:
+    TouchScreenState next_state{};
+    Core::HID::EmulatedConsole* console = nullptr;
+
+    std::array<Core::HID::TouchFinger, MAX_FINGERS> fingers{};
+    u32 touchscreen_width;
+    u32 touchscreen_height;
+};
+} // namespace Service::HID

src/hid_core/resources/touch_screen/touch_types.h

@@ -0,0 +1,90 @@
+// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#pragma once
+
+#include <array>
+
+#include <array>
+#include "common/bit_field.h"
+#include "common/common_funcs.h"
+#include "common/common_types.h"
+#include "common/point.h"
+#include "hid_core/hid_types.h"
+
+namespace Service::HID {
+static constexpr std::size_t MAX_FINGERS = 16;
+static constexpr size_t MAX_POINTS = 4;
+
+// This is nn::hid::GestureType
+enum class GestureType : u32 {
+    Idle,     // Nothing touching the screen
+    Complete, // Set at the end of a touch event
+    Cancel,   // Set when the number of fingers change
+    Touch,    // A finger just touched the screen
+    Press,    // Set if last type is touch and the finger hasn't moved
+    Tap,      // Fast press then release
+    Pan,      // All points moving together across the screen
+    Swipe,    // Fast press movement and release of a single point
+    Pinch,    // All points moving away/closer to the midpoint
+    Rotate,   // All points rotating from the midpoint
+};
+
+// This is nn::hid::GestureDirection
+enum class GestureDirection : u32 {
+    None,
+    Left,
+    Up,
+    Right,
+    Down,
+};
+
+// This is nn::hid::GestureAttribute
+struct GestureAttribute {
+    union {
+        u32 raw{};
+
+        BitField<4, 1, u32> is_new_touch;
+        BitField<8, 1, u32> is_double_tap;
+    };
+};
+static_assert(sizeof(GestureAttribute) == 4, "GestureAttribute is an invalid size");
+
+// This is nn::hid::GestureState
+struct GestureState {
+    s64 sampling_number{};
+    s64 detection_count{};
+    GestureType type{GestureType::Idle};
+    GestureDirection direction{GestureDirection::None};
+    Common::Point<s32> pos{};
+    Common::Point<s32> delta{};
+    f32 vel_x{};
+    f32 vel_y{};
+    GestureAttribute attributes{};
+    f32 scale{};
+    f32 rotation_angle{};
+    s32 point_count{};
+    std::array<Common::Point<s32>, 4> points{};
+};
+static_assert(sizeof(GestureState) == 0x60, "GestureState is an invalid size");
+
+struct GestureProperties {
+    std::array<Common::Point<s32>, MAX_POINTS> points{};
+    std::size_t active_points{};
+    Common::Point<s32> mid_point{};
+    s64 detection_count{};
+    u64 delta_time{};
+    f32 average_distance{};
+    f32 angle{};
+};
+
+// This is nn::hid::TouchScreenState
+struct TouchScreenState {
+    s64 sampling_number{};
+    s32 entry_count{};
+    INSERT_PADDING_BYTES(4); // Reserved
+    std::array<Core::HID::TouchState, MAX_FINGERS> states{};
+};
+static_assert(sizeof(TouchScreenState) == 0x290, "TouchScreenState is an invalid size");
+
+} // namespace Service::HID