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// Copyright 2021 yuzu Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#pragma once
#include <array>
#include "common/bit_field.h"
#include "common/common_types.h"
#include "common/point.h"
#include "core/frontend/input.h"
#include "core/hle/service/hid/controllers/controller_base.h"
namespace Service::HID {
class Controller_Gesture final : public ControllerBase {
public:
explicit Controller_Gesture(Core::System& system_);
~Controller_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, u8* data, size_t size) override;
// Called when input devices should be loaded
void OnLoadInputDevices() override;
private:
static constexpr size_t MAX_FINGERS = 16;
static constexpr size_t MAX_POINTS = 4;
enum class TouchType : 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
};
enum class Direction : u32 {
None,
Left,
Up,
Right,
Down,
};
struct Attribute {
union {
u32_le raw{};
BitField<4, 1, u32> is_new_touch;
BitField<8, 1, u32> is_double_tap;
};
};
static_assert(sizeof(Attribute) == 4, "Attribute is an invalid size");
struct GestureState {
s64_le sampling_number;
s64_le sampling_number2;
s64_le detection_count;
TouchType type;
Direction direction;
Common::Point<s32_le> pos;
Common::Point<s32_le> delta;
f32 vel_x;
f32 vel_y;
Attribute attributes;
f32 scale;
f32 rotation_angle;
s32_le point_count;
std::array<Common::Point<s32_le>, 4> points;
};
static_assert(sizeof(GestureState) == 0x68, "GestureState is an invalid size");
struct SharedMemory {
CommonHeader header;
std::array<GestureState, 17> gesture_states;
};
static_assert(sizeof(SharedMemory) == 0x708, "SharedMemory is an invalid size");
struct Finger {
Common::Point<f32> pos{};
bool pressed{};
};
struct GestureProperties {
std::array<Common::Point<s32_le>, MAX_POINTS> points{};
std::size_t active_points{};
Common::Point<s32_le> mid_point{};
s64_le detection_count{};
u64_le delta_time{};
f32 average_distance{};
f32 angle{};
};
// 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(u8* data, std::size_t size, GestureProperties& gesture,
f32 time_difference);
// Initializes new gesture
void NewGesture(GestureProperties& gesture, TouchType& type, Attribute& attributes);
// Updates existing gesture state
void UpdateExistingGesture(GestureProperties& gesture, TouchType& type, f32 time_difference);
// Terminates exiting gesture
void EndGesture(GestureProperties& gesture, GestureProperties& last_gesture_props,
TouchType& type, Attribute& attributes, f32 time_difference);
// Set current event to a tap event
void SetTapEvent(GestureProperties& gesture, GestureProperties& last_gesture_props,
TouchType& type, Attribute& attributes);
// Calculates and set the extra parameters related to a pan event
void UpdatePanEvent(GestureProperties& gesture, GestureProperties& last_gesture_props,
TouchType& type, f32 time_difference);
// Terminates the pan event
void EndPanEvent(GestureProperties& gesture, GestureProperties& last_gesture_props,
TouchType& type, f32 time_difference);
// Set current event to a swipe event
void SetSwipeEvent(GestureProperties& gesture, GestureProperties& last_gesture_props,
TouchType& type);
// Returns an unused finger id, if there is no fingers available std::nullopt is returned.
[[nodiscard]] std::optional<size_t> GetUnusedFingerID() const;
// Retrieves the last gesture entry, as indicated by shared memory indices.
[[nodiscard]] GestureState& GetLastGestureEntry();
[[nodiscard]] const GestureState& GetLastGestureEntry() const;
/**
* If the touch is new it tries to assign a new finger id, if there is no fingers available no
* changes will be made. Updates the coordinates if the finger id it's already set. If the touch
* ends delays the output by one frame to set the end_touch flag before finally freeing the
* finger id
*/
size_t UpdateTouchInputEvent(const std::tuple<float, float, bool>& touch_input,
size_t finger_id);
// Returns the average distance, angle and middle point of the active fingers
GestureProperties GetGestureProperties();
SharedMemory shared_memory{};
std::unique_ptr<Input::TouchDevice> touch_mouse_device;
std::unique_ptr<Input::TouchDevice> touch_udp_device;
std::unique_ptr<Input::TouchDevice> touch_btn_device;
std::array<size_t, MAX_FINGERS> mouse_finger_id{};
std::array<size_t, MAX_FINGERS> keyboard_finger_id{};
std::array<size_t, MAX_FINGERS> udp_finger_id{};
std::array<Finger, MAX_POINTS> fingers{};
GestureProperties last_gesture{};
s64_le last_update_timestamp{};
s64_le last_tap_timestamp{};
f32 last_pan_time_difference{};
bool force_update{false};
bool enable_press_and_tap{false};
};
} // namespace Service::HID
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