input_common: touch: Rewrite touch driver to support multiple touch points

2 files changed, 15 insertions, 4 deletions

diff --git a/src/core/hid/emulated_console.cpp b/src/core/hid/emulated_console.cpp
index fd220ccb5..aac45907d 100644
--- a/src/core/hid/emulated_console.cpp
+++ b/src/core/hid/emulated_console.cpp
@@ -27,12 +27,19 @@ void EmulatedConsole::SetTouchParams() {
         // We can't use mouse as touch if native mouse is enabled
         touch_params[index++] = Common::ParamPackage{"engine:mouse,axis_x:10,axis_y:11,button:0"};
     }
-    touch_params[index++] = Common::ParamPackage{"engine:touch,axis_x:0,axis_y:1,button:0"};
-    touch_params[index++] = Common::ParamPackage{"engine:touch,axis_x:2,axis_y:3,button:1"};
+
+    touch_params[index++] =
+        Common::ParamPackage{"engine:touch,axis_x:0,axis_y:1,button:0,touch_id:0"};
+    touch_params[index++] =
+        Common::ParamPackage{"engine:touch,axis_x:2,axis_y:3,button:1,touch_id:1"};
+    touch_params[index++] =
+        Common::ParamPackage{"engine:touch,axis_x:4,axis_y:5,button:2,touch_id:2"};
+    touch_params[index++] =
+        Common::ParamPackage{"engine:touch,axis_x:6,axis_y:7,button:3,touch_id:3"};
     touch_params[index++] =
-        Common::ParamPackage{"engine:cemuhookudp,axis_x:17,axis_y:18,button:65536"};
+        Common::ParamPackage{"engine:cemuhookudp,axis_x:17,axis_y:18,button:65536,touch_id:0"};
     touch_params[index++] =
-        Common::ParamPackage{"engine:cemuhookudp,axis_x:19,axis_y:20,button:131072"};
+        Common::ParamPackage{"engine:cemuhookudp,axis_x:19,axis_y:20,button:131072,touch_id:1"};
 
     const auto button_index =
         static_cast<u64>(Settings::values.touch_from_button_map_index.GetValue());
diff --git a/src/core/hid/input_converter.cpp b/src/core/hid/input_converter.cpp
index 3c26260f3..18d9f042d 100644
--- a/src/core/hid/input_converter.cpp
+++ b/src/core/hid/input_converter.cpp
@@ -1,6 +1,7 @@
 // SPDX-FileCopyrightText: Copyright 2021 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
+#include <algorithm>
 #include <random>
 
 #include "common/input.h"
@@ -196,6 +197,9 @@ Common::Input::TouchStatus TransformToTouch(const Common::Input::CallbackStatus&
     x = std::clamp(x, 0.0f, 1.0f);
     y = std::clamp(y, 0.0f, 1.0f);
 
+    // Limit id to maximum number of fingers
+    status.id = std::clamp(status.id, 0, 16);
+
     if (status.pressed.inverted) {
         status.pressed.value = !status.pressed.value;
     }