ALPHA_PREPROCESSED_LEVELS   59 3rdparty/libwebp/dec/alpha.c       pre_processing > ALPHA_PREPROCESSED_LEVELS ||
ALPHA_PREPROCESSED_LEVELS   80 3rdparty/libwebp/dec/alpha.c     if (pre_processing == ALPHA_PREPROCESSED_LEVELS) {
ALPHA_PREPROCESSED_LEVELS  126 3rdparty/libwebp/enc/alpha.c   if (reduce_levels) header |= ALPHA_PREPROCESSED_LEVELS << 4;