I''ve been looking through the fontconfig code, and have a couple of questions: Can/will FcPattern ever contain a FcValue of type FcPattern, or is it safe to assume this will never be the case? I couldn''t find any FcPatternAdd* function to add FcPattern. What is the typical use of FcPatternAdd with append, does this happen relatively often? FcCharSetFindLeafCreate(...) does not seem to check for FC_REF_CONSTANT, though all the callers of it that i could find handle this. I assume the caller is always responsible for this? FcPatternGet(...) just copies the pointer when the FcValues is a pointer. Is the client allowed to modify the content of this pointer, and how does this relate to a frozen FcPattern? Jari Sundell