From 8495e1bd8373fed993975e40c360c87409455e9e Mon Sep 17 00:00:00 2001
From: german <german@thesoftwareartisans.com>
Date: Sat, 2 Jan 2021 22:04:50 -0600
Subject: Add mutitouch support for touch screens

---
 src/input_common/touch_from_button.cpp |  4 ++--
 src/input_common/udp/client.cpp        | 19 ++++++++-----------
 src/input_common/udp/client.h          |  8 ++++----
 3 files changed, 14 insertions(+), 17 deletions(-)

(limited to 'src/input_common')

diff --git a/src/input_common/touch_from_button.cpp b/src/input_common/touch_from_button.cpp
index 5226e70df..ffbe4f2ed 100644
--- a/src/input_common/touch_from_button.cpp
+++ b/src/input_common/touch_from_button.cpp
@@ -26,8 +26,8 @@ public:
     }
 
     Input::TouchStatus GetStatus() const override {
-        Input::TouchStatus touch_status = {};
-        for (size_t id = 0; id < map.size() && id < touch_status.size(); id++) {
+        Input::TouchStatus touch_status{};
+        for (std::size_t id = 0; id < map.size() && id < touch_status.size(); ++id) {
             const bool state = std::get<0>(map[id])->GetStatus();
             if (state) {
                 const float x = static_cast<float>(std::get<1>(map[id])) /
diff --git a/src/input_common/udp/client.cpp b/src/input_common/udp/client.cpp
index 53648cb53..5e39fdce2 100644
--- a/src/input_common/udp/client.cpp
+++ b/src/input_common/udp/client.cpp
@@ -136,8 +136,8 @@ static void SocketLoop(Socket* socket) {
 
 Client::Client() {
     LOG_INFO(Input, "Udp Initialization started");
-    for (size_t id = 0; id < MAX_TOUCH_FINGERS; id++) {
-        finger_id[id] = MAX_UDP_CLIENTS * 2;
+    for (std::size_t id = 0; id < MAX_TOUCH_FINGERS; ++id) {
+        finger_id[id] = MAX_TOUCH_FINGERS;
     }
     ReloadSockets();
 }
@@ -262,7 +262,7 @@ void Client::OnPadData(Response::PadData data, std::size_t client) {
         std::lock_guard guard(clients[client].status.update_mutex);
         clients[client].status.motion_status = clients[client].motion.GetMotion();
 
-        for (size_t id = 0; id < data.touch.size(); id++) {
+        for (std::size_t id = 0; id < data.touch.size(); ++id) {
             UpdateTouchInput(data.touch[id], client, id);
         }
 
@@ -314,7 +314,7 @@ void Client::UpdateYuzuSettings(std::size_t client, const Common::Vec3<float>& a
         .port = clients[client].port,
         .pad_index = clients[client].pad_index,
     };
-    for (size_t i = 0; i < 3; ++i) {
+    for (std::size_t i = 0; i < 3; ++i) {
         if (gyro[i] > 5.0f || gyro[i] < -5.0f) {
             pad.motion = static_cast<PadMotion>(i);
             pad.motion_value = gyro[i];
@@ -328,8 +328,8 @@ void Client::UpdateYuzuSettings(std::size_t client, const Common::Vec3<float>& a
     }
 }
 
-std::optional<size_t> Client::GetUnusedFingerID() const {
-    size_t first_free_id = 0;
+std::optional<std::size_t> Client::GetUnusedFingerID() const {
+    std::size_t first_free_id = 0;
     while (first_free_id < MAX_TOUCH_FINGERS) {
         if (!std::get<2>(touch_status[first_free_id])) {
             return first_free_id;
@@ -340,7 +340,7 @@ std::optional<size_t> Client::GetUnusedFingerID() const {
     return std::nullopt;
 }
 
-void Client::UpdateTouchInput(Response::TouchPad& touch_pad, size_t client, size_t id) {
+void Client::UpdateTouchInput(Response::TouchPad& touch_pad, std::size_t client, std::size_t id) {
     // TODO: Use custom calibration per device
     const Common::ParamPackage touch_param(Settings::values.touch_device);
     const u16 min_x = static_cast<u16>(touch_param.Get("min_x", 100));
@@ -367,10 +367,7 @@ void Client::UpdateTouchInput(Response::TouchPad& touch_pad, size_t client, size
     }
 
     if (finger_id[client * 2 + id] != MAX_TOUCH_FINGERS) {
-        auto& [x, y, pressed] = touch_status[finger_id[client * 2 + id]];
-        x = 0;
-        y = 0;
-        pressed = false;
+        touch_status[finger_id[client * 2 + id]] = {};
         finger_id[client * 2 + id] = MAX_TOUCH_FINGERS;
     }
 }
diff --git a/src/input_common/udp/client.h b/src/input_common/udp/client.h
index 1cd251ec8..822f9c550 100644
--- a/src/input_common/udp/client.h
+++ b/src/input_common/udp/client.h
@@ -28,8 +28,8 @@ class Socket;
 namespace Response {
 struct PadData;
 struct PortInfo;
-struct Version;
 struct TouchPad;
+struct Version;
 } // namespace Response
 
 enum class PadMotion {
@@ -129,10 +129,10 @@ private:
 
     // Returns an unused finger id, if there is no fingers available std::nullopt will be
     // returned
-    std::optional<size_t> GetUnusedFingerID() const;
+    std::optional<std::size_t> GetUnusedFingerID() const;
 
     // Merges and updates all touch inputs into the touch_status array
-    void UpdateTouchInput(Response::TouchPad& touch_pad, size_t client, size_t id);
+    void UpdateTouchInput(Response::TouchPad& touch_pad, std::size_t client, std::size_t id);
 
     bool configuring = false;
 
@@ -143,7 +143,7 @@ private:
     std::array<ClientData, MAX_UDP_CLIENTS> clients{};
     Common::SPSCQueue<UDPPadStatus> pad_queue{};
     Input::TouchStatus touch_status{};
-    std::array<size_t, MAX_TOUCH_FINGERS> finger_id{};
+    std::array<std::size_t, MAX_TOUCH_FINGERS> finger_id{};
 };
 
 /// An async job allowing configuration of the touchpad calibration.
-- 
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