From e895ab7d6f06274c9ae4efdc8cf545d37a756e6a Mon Sep 17 00:00:00 2001
From: german <german@thesoftwareartisans.com>
Date: Fri, 1 Jan 2021 20:37:29 -0600
Subject: [PATCH] Implements touch, pan, pinch and rotation gestures
---
.../hle/service/hid/controllers/gesture.cpp | 159 +++++++++++++++++-
.../hle/service/hid/controllers/gesture.h | 92 +++++++++-
2 files changed, 240 insertions(+), 11 deletions(-)
diff --git a/src/core/hle/service/hid/controllers/gesture.cpp b/src/core/hle/service/hid/controllers/gesture.cpp
index b7b7bfeae5..e7063f8ef6 100644
--- a/src/core/hle/service/hid/controllers/gesture.cpp
+++ b/src/core/hle/service/hid/controllers/gesture.cpp
@@ -5,15 +5,25 @@
#include <cstring>
#include "common/common_types.h"
#include "core/core_timing.h"
+#include "core/frontend/emu_window.h"
#include "core/hle/service/hid/controllers/gesture.h"
+#include "core/settings.h"
namespace Service::HID {
constexpr std::size_t SHARED_MEMORY_OFFSET = 0x3BA00;
+constexpr f32 angle_threshold = 0.08f;
+constexpr f32 pinch_threshold = 100.0f;
Controller_Gesture::Controller_Gesture(Core::System& system) : ControllerBase(system) {}
Controller_Gesture::~Controller_Gesture() = default;
-void Controller_Gesture::OnInit() {}
+void Controller_Gesture::OnInit() {
+ for (std::size_t id = 0; id < MAX_FINGERS; ++id) {
+ mouse_finger_id[id] = MAX_FINGERS;
+ keyboard_finger_id[id] = MAX_FINGERS;
+ udp_finger_id[id] = MAX_FINGERS;
+ }
+}
void Controller_Gesture::OnRelease() {}
@@ -35,10 +45,153 @@ void Controller_Gesture::OnUpdate(const Core::Timing::CoreTiming& core_timing, u
cur_entry.sampling_number = last_entry.sampling_number + 1;
cur_entry.sampling_number2 = cur_entry.sampling_number;
- // TODO(ogniK): Update gesture states
+
+ // TODO(german77): Implement all gesture types
+
+ const Input::TouchStatus& mouse_status = touch_mouse_device->GetStatus();
+ const Input::TouchStatus& udp_status = touch_udp_device->GetStatus();
+ for (std::size_t id = 0; id < mouse_status.size(); ++id) {
+ mouse_finger_id[id] = UpdateTouchInputEvent(mouse_status[id], mouse_finger_id[id]);
+ udp_finger_id[id] = UpdateTouchInputEvent(udp_status[id], udp_finger_id[id]);
+ }
+
+ if (Settings::values.use_touch_from_button) {
+ const Input::TouchStatus& keyboard_status = touch_btn_device->GetStatus();
+ for (std::size_t id = 0; id < mouse_status.size(); ++id) {
+ keyboard_finger_id[id] =
+ UpdateTouchInputEvent(keyboard_status[id], keyboard_finger_id[id]);
+ }
+ }
+
+ TouchType type = TouchType::Idle;
+ Attribute attributes{};
+ GestureProperties gesture = GetGestureProperties();
+ if (last_gesture.active_points != gesture.active_points) {
+ ++last_gesture.detection_count;
+ }
+ if (gesture.active_points > 0) {
+ if (last_gesture.active_points == 0) {
+ attributes.is_new_touch.Assign(true);
+ last_gesture.average_distance = gesture.average_distance;
+ last_gesture.angle = gesture.angle;
+ }
+
+ type = TouchType::Touch;
+ if (gesture.mid_point.x != last_entry.x || gesture.mid_point.y != last_entry.y) {
+ type = TouchType::Pan;
+ }
+ if (std::abs(gesture.average_distance - last_gesture.average_distance) > pinch_threshold) {
+ type = TouchType::Pinch;
+ }
+ if (std::abs(gesture.angle - last_gesture.angle) > angle_threshold) {
+ type = TouchType::Rotate;
+ }
+
+ cur_entry.delta_x = gesture.mid_point.x - last_entry.x;
+ cur_entry.delta_y = gesture.mid_point.y - last_entry.y;
+ // TODO: Find how velocities are calculated
+ cur_entry.vel_x = static_cast<float>(cur_entry.delta_x) * 150.1f;
+ cur_entry.vel_y = static_cast<float>(cur_entry.delta_y) * 150.1f;
+
+ // Slowdown the rate of change for less flapping
+ last_gesture.average_distance =
+ (last_gesture.average_distance * 0.9f) + (gesture.average_distance * 0.1f);
+ last_gesture.angle = (last_gesture.angle * 0.9f) + (gesture.angle * 0.1f);
+
+ } else {
+ cur_entry.delta_x = 0;
+ cur_entry.delta_y = 0;
+ cur_entry.vel_x = 0;
+ cur_entry.vel_y = 0;
+ }
+ last_gesture.active_points = gesture.active_points;
+ cur_entry.detection_count = last_gesture.detection_count;
+ cur_entry.type = type;
+ cur_entry.attributes = attributes;
+ cur_entry.x = gesture.mid_point.x;
+ cur_entry.y = gesture.mid_point.y;
+ cur_entry.point_count = static_cast<s32>(gesture.active_points);
+ for (size_t id = 0; id < MAX_POINTS; id++) {
+ cur_entry.points[id].x = gesture.points[id].x;
+ cur_entry.points[id].y = gesture.points[id].y;
+ }
+ cur_entry.rotation_angle = 0;
+ cur_entry.scale = 0;
std::memcpy(data + SHARED_MEMORY_OFFSET, &shared_memory, sizeof(SharedMemory));
}
-void Controller_Gesture::OnLoadInputDevices() {}
+void Controller_Gesture::OnLoadInputDevices() {
+ touch_mouse_device = Input::CreateDevice<Input::TouchDevice>("engine:emu_window");
+ touch_udp_device = Input::CreateDevice<Input::TouchDevice>("engine:cemuhookudp");
+ touch_btn_device = Input::CreateDevice<Input::TouchDevice>("engine:touch_from_button");
+}
+
+std::optional<std::size_t> Controller_Gesture::GetUnusedFingerID() const {
+ std::size_t first_free_id = 0;
+ while (first_free_id < MAX_POINTS) {
+ if (!fingers[first_free_id].pressed) {
+ return first_free_id;
+ } else {
+ first_free_id++;
+ }
+ }
+ return std::nullopt;
+}
+
+std::size_t Controller_Gesture::UpdateTouchInputEvent(
+ const std::tuple<float, float, bool>& touch_input, std::size_t finger_id) {
+ const auto& [x, y, pressed] = touch_input;
+ if (pressed) {
+ if (finger_id == MAX_POINTS) {
+ const auto first_free_id = GetUnusedFingerID();
+ if (!first_free_id) {
+ // Invalid finger id do nothing
+ return MAX_POINTS;
+ }
+ finger_id = first_free_id.value();
+ fingers[finger_id].pressed = true;
+ }
+ fingers[finger_id].x = x;
+ fingers[finger_id].y = y;
+ return finger_id;
+ }
+
+ if (finger_id != MAX_POINTS) {
+ fingers[finger_id].pressed = false;
+ }
+
+ return MAX_POINTS;
+}
+
+Controller_Gesture::GestureProperties Controller_Gesture::GetGestureProperties() {
+ GestureProperties gesture;
+ std::array<Finger, 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) {
+ gesture.points[id].x =
+ static_cast<int>(active_fingers[id].x * Layout::ScreenUndocked::Width);
+ gesture.points[id].y =
+ static_cast<int>(active_fingers[id].y * Layout::ScreenUndocked::Height);
+ gesture.mid_point.x += static_cast<int>(gesture.points[id].x / gesture.active_points);
+ gesture.mid_point.y += static_cast<int>(gesture.points[id].y / gesture.active_points);
+ }
+
+ for (size_t id = 0; id < gesture.active_points; ++id) {
+ const double distance =
+ std::pow(static_cast<float>(gesture.mid_point.x - gesture.points[id].x), 2) +
+ std::pow(static_cast<float>(gesture.mid_point.y - gesture.points[id].y), 2);
+ gesture.average_distance +=
+ static_cast<float>(distance) / static_cast<float>(gesture.active_points);
+ }
+
+ gesture.angle = std::atan2(static_cast<float>(gesture.mid_point.y - gesture.points[0].y),
+ static_cast<float>(gesture.mid_point.x - gesture.points[0].x));
+ return gesture;
+}
+
} // namespace Service::HID
diff --git a/src/core/hle/service/hid/controllers/gesture.h b/src/core/hle/service/hid/controllers/gesture.h
index f650b8338b..60ecc78221 100644
--- a/src/core/hle/service/hid/controllers/gesture.h
+++ b/src/core/hle/service/hid/controllers/gesture.h
@@ -5,8 +5,10 @@
#pragma once
#include <array>
+#include "common/bit_field.h"
#include "common/common_types.h"
#include "common/swap.h"
+#include "core/frontend/input.h"
#include "core/hle/service/hid/controllers/controller_base.h"
namespace Service::HID {
@@ -28,29 +30,64 @@ public:
void OnLoadInputDevices() override;
private:
- struct Locations {
+ static constexpr size_t MAX_FINGERS = 16;
+ static constexpr size_t MAX_POINTS = 4;
+
+ enum class TouchType : u32 {
+ Idle, // Nothing touching the screen
+ Complete, // Unknown. End of touch?
+ Cancel, // Never triggered
+ Touch, // Pressing without movement
+ Press, // Never triggered
+ 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<0, 1, u32> is_new_touch;
+ BitField<1, 1, u32> is_double_tap;
+ };
+ };
+ static_assert(sizeof(Attribute) == 4, "Attribute is an invalid size");
+
+ struct Points {
s32_le x;
s32_le y;
};
+ static_assert(sizeof(Points) == 8, "Points is an invalid size");
struct GestureState {
s64_le sampling_number;
s64_le sampling_number2;
s64_le detection_count;
- s32_le type;
- s32_le dir;
+ TouchType type;
+ Direction dir;
s32_le x;
s32_le y;
s32_le delta_x;
s32_le delta_y;
f32 vel_x;
f32 vel_y;
- s32_le attributes;
- f32 scale;
- f32 rotation;
- s32_le location_count;
- std::array<Locations, 4> locations;
+ Attribute attributes;
+ u32 scale;
+ u32 rotation_angle;
+ s32_le point_count;
+ std::array<Points, 4> points;
};
static_assert(sizeof(GestureState) == 0x68, "GestureState is an invalid size");
@@ -58,6 +95,45 @@ private:
CommonHeader header;
std::array<GestureState, 17> gesture_states;
};
+ static_assert(sizeof(SharedMemory) == 0x708, "SharedMemory is an invalid size");
+
+ struct Finger {
+ f32 x{};
+ f32 y{};
+ bool pressed{};
+ };
+
+ struct GestureProperties {
+ std::array<Points, MAX_POINTS> points{};
+ std::size_t active_points{};
+ Points mid_point{};
+ s64_le detection_count{};
+ u64_le delta_time{};
+ float average_distance{};
+ float angle{};
+ };
+
+ // Returns an unused finger id, if there is no fingers avaliable MAX_FINGERS will be returned
+ std::optional<size_t> GetUnusedFingerID() const;
+
+ /** If the touch is new it tries to assing a new finger id, if there is no fingers avaliable 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;
};
} // namespace Service::HID