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[glyf] Optimize flag decoding

This commit is contained in:
Behdad Esfahbod 2022-06-26 16:56:24 -06:00
parent 30d58bfd0f
commit 86b7022503
1 changed files with 5 additions and 4 deletions
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9
src/OT/glyf/SimpleGlyph.hh
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@ -170,17 +170,18 @@ struct SimpleGlyph
endPtsOfContours[num_contours]); endPtsOfContours[num_contours]);
/* Read flags */ /* Read flags */
for (unsigned int i = 0; i < num_points; i++) for (unsigned int i = 0; i < num_points;)
{ {
if (unlikely (!bytes.check_range (p))) return false; if (unlikely (!bytes.check_range (p))) return false;
uint8_t flag = *p++; uint8_t flag = *p++;
points_[i].flag = flag; points_[i++].flag = flag;
if (flag & FLAG_REPEAT) if (flag & FLAG_REPEAT)
{ {
if (unlikely (!bytes.check_range (p))) return false; if (unlikely (!bytes.check_range (p))) return false;
unsigned int repeat_count = *p++; unsigned int repeat_count = *p++;
while ((repeat_count-- > 0) && (++i < num_points)) unsigned stop = hb_min (i + repeat_count, num_points);
points_[i].flag = flag; for (; i < stop;)
points_.arrayZ[i++].flag = flag;
} }
} }