Reserve a few scratch-flags bits for complex shapers
diff --git a/src/hb-buffer-private.hh b/src/hb-buffer-private.hh
index 53c6780..721e718 100644
--- a/src/hb-buffer-private.hh
+++ b/src/hb-buffer-private.hh
@@ -48,6 +48,11 @@
HB_BUFFER_SCRATCH_FLAG_HAS_SPACE_FALLBACK = 0x00000004u,
HB_BUFFER_SCRATCH_FLAG_HAS_GPOS_CURSIVE = 0x00000008u,
HB_BUFFER_SCRATCH_FLAG_HAS_GPOS_ATTACHMENT = 0x00000010u,
+ /* Reserved for complex shapers' internal use. */
+ HB_BUFFER_SCRATCH_FLAG_COMPLEX0 = 0x01000000u,
+ HB_BUFFER_SCRATCH_FLAG_COMPLEX1 = 0x02000000u,
+ HB_BUFFER_SCRATCH_FLAG_COMPLEX2 = 0x04000000u,
+ HB_BUFFER_SCRATCH_FLAG_COMPLEX3 = 0x08000000u,
};
template <> class hb_mark_as_flags_t<hb_buffer_scratch_flags_t> {};
