input_common: Rewrite touch

src/input_common/CMakeLists.txt

@@ -3,6 +3,8 @@ add_library(input_common STATIC
     drivers/keyboard.h
     drivers/mouse.cpp
     drivers/mouse.h
+    drivers/touch_screen.cpp
+    drivers/touch_screen.h
     helpers/stick_from_buttons.cpp
     helpers/stick_from_buttons.h
     helpers/touch_from_buttons.cpp

src/input_common/drivers/touch_screen.cpp

@@ -0,0 +1,47 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included
+
+#include "common/param_package.h"
+#include "input_common/drivers/touch_screen.h"
+
+namespace InputCommon {
+
+TouchScreen::TouchScreen(const std::string input_engine_) : InputEngine(input_engine_) {
+    PreSetController(identifier);
+}
+
+void TouchScreen::TouchMoved(float x, float y, std::size_t finger) {
+    if (finger >= 16) {
+        return;
+    }
+    TouchPressed(x, y, finger);
+}
+
+void TouchScreen::TouchPressed(float x, float y, std::size_t finger) {
+    if (finger >= 16) {
+        return;
+    }
+    SetButton(identifier, static_cast<int>(finger), true);
+    SetAxis(identifier, static_cast<int>(finger * 2), x);
+    SetAxis(identifier, static_cast<int>(finger * 2 + 1), y);
+}
+
+void TouchScreen::TouchReleased(std::size_t finger) {
+    if (finger >= 16) {
+        return;
+    }
+    SetButton(identifier, static_cast<int>(finger), false);
+    SetAxis(identifier, static_cast<int>(finger * 2), 0.0f);
+    SetAxis(identifier, static_cast<int>(finger * 2 + 1), 0.0f);
+}
+
+void TouchScreen::ReleaseAllTouch() {
+    for (int index = 0; index < 16; ++index) {
+        SetButton(identifier, index, false);
+        SetAxis(identifier, index * 2, 0.0f);
+        SetAxis(identifier, index * 2 + 1, 0.0f);
+    }
+}
+
+} // namespace InputCommon

src/input_common/drivers/touch_screen.h

@@ -0,0 +1,50 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included
+
+#pragma once
+
+#include "input_common/input_engine.h"
+
+namespace InputCommon {
+
+/**
+ * A button device factory representing a keyboard. It receives keyboard events and forward them
+ * to all button devices it created.
+ */
+class TouchScreen final : public InputCommon::InputEngine {
+public:
+    explicit TouchScreen(const std::string input_engine_);
+
+    /**
+     * Signals that mouse has moved.
+     * @param x the x-coordinate of the cursor
+     * @param y the y-coordinate of the cursor
+     * @param center_x the x-coordinate of the middle of the screen
+     * @param center_y the y-coordinate of the middle of the screen
+     */
+    void TouchMoved(float x, float y, std::size_t finger);
+
+    /**
+     * Sets the status of all buttons bound with the key to pressed
+     * @param key_code the code of the key to press
+     */
+    void TouchPressed(float x, float y, std::size_t finger);
+
+    /**
+     * Sets the status of all buttons bound with the key to released
+     * @param key_code the code of the key to release
+     */
+    void TouchReleased(std::size_t finger);
+
+    void ReleaseAllTouch();
+
+private:
+    const PadIdentifier identifier = {
+        .guid = Common::UUID{""},
+        .port = 0,
+        .pad = 0,
+    };
+};
+
+} // namespace InputCommon