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// SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#pragma once
#include <array>
#include "common/bit_field.h"
#include "common/common_types.h"
#include "common/point.h"
#include "core/hid/emulated_console.h"
#include "core/hle/service/hid/controllers/controller_base.h"
#include "core/hle/service/hid/ring_lifo.h"
namespace Service::HID {
class Controller_Gesture final : public ControllerBase {
public:
explicit Controller_Gesture(Core::HID::HIDCore& hid_core_, u8* raw_shared_memory_);
~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) override;
private:
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{};
};
struct GestureSharedMemory {
// This is nn::hid::detail::GestureLifo
Lifo<GestureState, hid_entry_count> gesture_lifo{};
static_assert(sizeof(gesture_lifo) == 0x708, "gesture_lifo is an invalid size");
INSERT_PADDING_WORDS(0x3E);
};
static_assert(sizeof(GestureSharedMemory) == 0x800, "GestureSharedMemory is an invalid size");
// 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{};
GestureSharedMemory* shared_memory = nullptr;
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
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