int32_t dxtfilter(int32_t fil, const texcachepicture *pict, const char *pic, void *midbuf, char *packbuf, uint32_t miplen);
int32_t dedxtfilter(int32_t fil, const texcachepicture *pict, char *pic, void *midbuf, char *packbuf, int32_t ispacked);
