support variable font

Author: snowie2000

common.cpp

@@ -0,0 +1,32 @@
+#include "common.h"
+
+std::wstring to_utf16le(const std::wstring& input) {
+	std::wstring utf16_string;
+	int len = input.length();
+	char* content = (char*)input.c_str();
+	utf16_string.reserve(len);
+	for (size_t i = 0; i < len; i += 2) {
+		char16_t code_unit = (static_cast<char16_t>(content[i]) << 8) |
+			static_cast<char16_t>(content[i + 1]);
+		utf16_string.push_back(code_unit);
+	}
+	return utf16_string;
+}
+
+std::wstring to_wide_string(const std::string& input)
+{
+	std::wstring_convert<std::codecvt_utf8<wchar_t>> converter;
+	return converter.from_bytes(input);
+}
+// convert wstring to string 
+std::string to_byte_string(const std::wstring& input)
+{
+	//std::wstring_convert<std::codecvt_utf8_utf16<wchar_t>> converter;
+	std::wstring_convert<std::codecvt_utf8<wchar_t>> converter;
+	return converter.to_bytes(input);
+}
+
+wstring to_lower_case(wstring str) {
+	transform(str.begin(), str.end(), str.begin(), ::tolower);
+	return str;
+}

common.h

@@ -90,19 +90,15 @@ void Log(wchar_t* Msg);
 
 
 // convert string to wstring
-inline std::wstring to_wide_string(const std::string & input)
-{
-	std::wstring_convert<std::codecvt_utf8<wchar_t>> converter;
-	return converter.from_bytes(input);
-}
+std::wstring to_wide_string(const std::string & input);
+
 // convert wstring to string 
-inline std::string to_byte_string(const std::wstring & input)
-{
-	//std::wstring_convert<std::codecvt_utf8_utf16<wchar_t>> converter;
-	std::wstring_convert<std::codecvt_utf8<wchar_t>> converter;
-	return converter.to_bytes(input);
-}
+std::string to_byte_string(const std::wstring & input);
+
+// convert a utf-16be string back to utf-16le string
+std::wstring to_utf16le(const std::wstring& input);
 
+wstring to_lower_case(wstring str);
 
 FORCEINLINE HINSTANCE GetDLLInstance()
 {