Function DecodeUTF8Path

tests/texturetests/texturetests.cc:3143–3154

For Windows, we convert the UTF-8 path to a UTF-16 path to force using the APIs that correctly handle unicode characters.

// For Windows, we convert the UTF-8 path to a UTF-16 path to force using
// the APIs that correctly handle unicode characters.
inline std::wstring
DecodeUTF8Path(std::string path) {
    std::wstring result;
    int len =
        MultiByteToWideChar(CP_UTF8, 0, path.c_str(), static_cast<int>(path.length()), NULL, 0);
    if (len > 0) {
        result.resize(len);
        MultiByteToWideChar(CP_UTF8, 0, path.c_str(), static_cast<int>(path.length()), &result[0],
                            len);
    }
    return result;
}
#else
// For other platforms there is no need for any conversion, they
// support UTF-8 natively.