software_keyboard: Check for UTF-8 config flag

src/core/hle/service/am/applets/software_keyboard.cpp

@@ -120,14 +120,27 @@ void SoftwareKeyboard::WriteText(std::optional<std::u16string> text) {
         std::vector<u8> output_sub(SWKBD_OUTPUT_BUFFER_SIZE);
         status = RESULT_SUCCESS;
 
-        const u64 size = text->size() * 2 + 8;
-        std::memcpy(output_sub.data(), &size, sizeof(u64));
-        std::memcpy(output_sub.data() + 8, text->data(),
-                    std::min(text->size() * 2, SWKBD_OUTPUT_BUFFER_SIZE - 8));
-
-        output_main[0] = config.text_check;
-        std::memcpy(output_main.data() + 4, text->data(),
-                    std::min(text->size() * 2, SWKBD_OUTPUT_BUFFER_SIZE - 4));
+        if (config.utf_8) {
+            const u64 size = text->size() + 8;
+            const auto new_text = Common::UTF16ToUTF8(*text);
+
+            std::memcpy(output_sub.data(), &size, sizeof(u64));
+            std::memcpy(output_sub.data() + 8, new_text.data(),
+                        std::min(new_text.size(), SWKBD_OUTPUT_BUFFER_SIZE - 8));
+
+            output_main[0] = config.text_check;
+            std::memcpy(output_main.data() + 4, new_text.data(),
+                        std::min(new_text.size(), SWKBD_OUTPUT_BUFFER_SIZE - 4));
+        } else {
+            const u64 size = text->size() * 2 + 8;
+            std::memcpy(output_sub.data(), &size, sizeof(u64));
+            std::memcpy(output_sub.data() + 8, text->data(),
+                        std::min(text->size() * 2, SWKBD_OUTPUT_BUFFER_SIZE - 8));
+
+            output_main[0] = config.text_check;
+            std::memcpy(output_main.data() + 4, text->data(),
+                        std::min(text->size() * 2, SWKBD_OUTPUT_BUFFER_SIZE - 4));
+        }
 
         complete = !config.text_check;
         final_data = output_main;

src/core/hle/service/am/applets/software_keyboard.h

@@ -33,7 +33,8 @@ struct KeyboardConfig {
     u32_le length_limit;
     INSERT_PADDING_BYTES(4);
     u32_le is_password;
-    INSERT_PADDING_BYTES(6);
+    INSERT_PADDING_BYTES(5);
+    bool utf_8;
     bool draw_background;
     u32_le initial_string_offset;
     u32_le initial_string_size;