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[subset] Optimize Cmap4 collect_unicodes. 

Use set add_range() instead of individual add() calls.
This commit is contained in:
Garret Rieger 2022-04-29 19:21:13 +00:00
parent 5866ec05f5
commit b4236b7de6
1 changed files with 6 additions and 4 deletions
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10
src/hb-ot-cmap-table.hh
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@ -440,14 +440,14 @@ struct CmapSubtableFormat4
hb_codepoint_t start = this->startCount[i];
hb_codepoint_t end = this->endCount[i];
unsigned int rangeOffset = this->idRangeOffset[i];
out->add_range(start, end);
if (rangeOffset == 0)
{
for (hb_codepoint_t codepoint = start; codepoint <= end; codepoint++)
{
hb_codepoint_t gid = (codepoint + this->idDelta[i]) & 0xFFFFu;
if (unlikely (!gid))
continue;
out->add (codepoint);
out->del(codepoint);
}
}
else
@ -456,11 +456,13 @@ struct CmapSubtableFormat4
{
unsigned int index = rangeOffset / 2 + (codepoint - this->startCount[i]) + i - this->segCount;
if (unlikely (index >= this->glyphIdArrayLength))
{
out->del_range (codepoint, end);
break;
}
hb_codepoint_t gid = this->glyphIdArray[index];
if (unlikely (!gid))
continue;
out->add (codepoint);
out->del(codepoint);
}
}
}