yuzu: Add motion and touch configuration

src/input_common/touch_from_button.cpp

@@ -0,0 +1,49 @@
+// Copyright 2020 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include "core/settings.h"
+#include "input_common/touch_from_button.h"
+
+namespace InputCommon {
+
+class TouchFromButtonDevice final : public Input::TouchDevice {
+public:
+    TouchFromButtonDevice() {
+        for (const auto& config_entry :
+             Settings::values.touch_from_button_maps[Settings::values.touch_from_button_map_index]
+                 .buttons) {
+            const Common::ParamPackage package{config_entry};
+            map.emplace_back(
+                Input::CreateDevice<Input::ButtonDevice>(config_entry),
+                std::clamp(package.Get("x", 0), 0, static_cast<int>(Layout::ScreenUndocked::Width)),
+                std::clamp(package.Get("y", 0), 0,
+                           static_cast<int>(Layout::ScreenUndocked::Height)));
+        }
+    }
+
+    std::tuple<float, float, bool> GetStatus() const override {
+        for (const auto& m : map) {
+            const bool state = std::get<0>(m)->GetStatus();
+            if (state) {
+                const float x = static_cast<float>(std::get<1>(m)) /
+                                static_cast<int>(Layout::ScreenUndocked::Width);
+                const float y = static_cast<float>(std::get<2>(m)) /
+                                static_cast<int>(Layout::ScreenUndocked::Height);
+                return std::make_tuple(x, y, true);
+            }
+        }
+        return std::make_tuple(0.0f, 0.0f, false);
+    }
+
+private:
+    std::vector<std::tuple<std::unique_ptr<Input::ButtonDevice>, int, int>> map; // button, x, y
+};
+
+std::unique_ptr<Input::TouchDevice> TouchFromButtonFactory::Create(
+    const Common::ParamPackage& params) {
+
+    return std::make_unique<TouchFromButtonDevice>();
+}
+
+} // namespace InputCommon