[unsafe-to-break] Copy flag to all glyphs in a cluster
Makes consumption easier.
diff --git a/src/hb-buffer-private.hh b/src/hb-buffer-private.hh
index 01972af..25da222 100644
--- a/src/hb-buffer-private.hh
+++ b/src/hb-buffer-private.hh
@@ -57,6 +57,8 @@
HB_BUFFER_SCRATCH_FLAG_HAS_DEFAULT_IGNORABLES = 0x00000002u,
HB_BUFFER_SCRATCH_FLAG_HAS_SPACE_FALLBACK = 0x00000004u,
HB_BUFFER_SCRATCH_FLAG_HAS_GPOS_ATTACHMENT = 0x00000008u,
+ HB_BUFFER_SCRATCH_FLAG_HAS_UNSAFE_TO_BREAK = 0x00000010u,
+
/* Reserved for complex shapers' internal use. */
HB_BUFFER_SCRATCH_FLAG_COMPLEX0 = 0x01000000u,
HB_BUFFER_SCRATCH_FLAG_COMPLEX1 = 0x02000000u,
@@ -301,9 +303,53 @@
}
info.cluster = cluster;
}
+
+ int
+ _unsafe_to_break_find_min_cluster (const hb_glyph_info_t *info,
+ unsigned int start, unsigned int end,
+ unsigned int cluster) const
+ {
+ for (unsigned int i = start; i < end; i++)
+ cluster = MIN (cluster, info[i].cluster);
+ return cluster;
+ }
+ void
+ _unsafe_to_break_set_mask (hb_glyph_info_t *info,
+ unsigned int start, unsigned int end,
+ unsigned int cluster)
+ {
+ for (unsigned int i = start; i < end; i++)
+ if (cluster != info[i].cluster)
+ {
+ scratch_flags |= HB_BUFFER_SCRATCH_FLAG_HAS_UNSAFE_TO_BREAK;
+ info[i].mask |= HB_GLYPH_FLAG_UNSAFE_TO_BREAK;
+ }
+ }
};
+/* Loop over clusters. Duplicated in foreach_syllable(). */
+#define foreach_cluster(buffer, start, end) \
+ for (unsigned int \
+ _count = buffer->len, \
+ start = 0, end = _count ? _next_cluster (buffer, 0) : 0; \
+ start < _count; \
+ start = end, end = _next_cluster (buffer, start))
+
+static inline unsigned int
+_next_cluster (hb_buffer_t *buffer, unsigned int start)
+{
+ hb_glyph_info_t *info = buffer->info;
+ unsigned int count = buffer->len;
+
+ unsigned int cluster = info[start].cluster;
+ while (++start < count && cluster == info[start].cluster)
+ ;
+
+ return start;
+}
+
+
#define HB_BUFFER_XALLOCATE_VAR(b, func, var) \
b->func (offsetof (hb_glyph_info_t, var) - offsetof(hb_glyph_info_t, var1), \
sizeof (b->info[0].var))
