From 14fe7ee414c672530b36420182539abfd53c7839 Mon Sep 17 00:00:00 2001
From: Victor Oliveira <rhapsodyv@gmail.com>
Date: Mon, 12 Oct 2020 20:01:03 -0300
Subject: [PATCH] Fix UTF8 handling for Color UI (#19708)

---
 Marlin/src/lcd/tft/tft_string.cpp | 11 +++++++++++
 Marlin/src/lcd/tft/tft_string.h   |  2 +-
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/Marlin/src/lcd/tft/tft_string.cpp b/Marlin/src/lcd/tft/tft_string.cpp
index 7e66c3d29c..663ed97c36 100644
--- a/Marlin/src/lcd/tft/tft_string.cpp
+++ b/Marlin/src/lcd/tft/tft_string.cpp
@@ -116,6 +116,17 @@ void TFT_String::add(uint8_t *string, int8_t index, uint8_t *itemString) {
   eol();
 }
 
+void TFT_String::add(uint8_t *string) {
+  wchar_t wchar;
+  while (*string) {
+    string = get_utf8_value_cb(string, read_byte, &wchar);
+    if (wchar > 255) wchar |= 0x0080;
+    uint8_t ch = uint8_t(wchar & 0x00FF);
+    add_character(ch);
+  }
+  eol();
+}
+
 void TFT_String::add_character(uint8_t character) {
   if (length < MAX_STRING_LENGTH) {
     data[length] = character;
diff --git a/Marlin/src/lcd/tft/tft_string.h b/Marlin/src/lcd/tft/tft_string.h
index d83d3af702..924d6de430 100644
--- a/Marlin/src/lcd/tft/tft_string.h
+++ b/Marlin/src/lcd/tft/tft_string.h
@@ -85,7 +85,7 @@ class TFT_String {
 
     static void set();
     static void add(uint8_t character) { add_character(character); eol(); }
-    static void add(uint8_t *string) { while (*string) { add_character(*string++); } eol(); }
+    static void add(uint8_t *string);
     static void add(uint8_t *string, int8_t index, uint8_t *itemString = NULL);
     static void set(uint8_t *string) { set(); add(string); };
     static void set(uint8_t *string, int8_t index, const char *itemString = NULL) { set(); add(string, index, (uint8_t *)itemString); };