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[buffer] Speed up merge_clusters_impl

This commit is contained in:
Behdad Esfahbod 2023-02-06 16:12:03 -07:00
parent 1930760bc2
commit ce6440fceb
1 changed files with 7 additions and 5 deletions
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4
src/hb-buffer.cc
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@ -522,15 +522,17 @@ hb_buffer_t::merge_clusters_impl (unsigned int start,
cluster = hb_min (cluster, info[i].cluster);
/* Extend end */
if (cluster != info[end - 1].cluster)
while (end < len && info[end - 1].cluster == info[end].cluster)
end++;
/* Extend start */
if (cluster != info[start].cluster)
while (idx < start && info[start - 1].cluster == info[start].cluster)
start--;
/* If we hit the start of buffer, continue in out-buffer. */
if (idx == start)
if (idx == start && info[start].cluster != cluster)
for (unsigned int i = out_len; i && out_info[i - 1].cluster == info[start].cluster; i--)
set_cluster (out_info[i - 1], cluster);