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[gvar] Optimize unpack_deltas

This commit is contained in:
Behdad Esfahbod 2022-11-22 10:13:14 -07:00
parent bca569ae53
commit 6d7206b68b
1 changed files with 9 additions and 5 deletions
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14
src/hb-ot-var-gvar-table.hh
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@ -342,19 +342,23 @@ struct GlyphVariationData
unsigned int j;
if (control & DELTAS_ARE_ZERO)
for (j = 0; j < run_count && i < count; j++, i++)
deltas[i] = 0;
deltas.arrayZ[i] = 0;
else if (control & DELTAS_ARE_WORDS)
{
if (unlikely (p + run_count * HBUINT16::static_size > end)) return false;
for (j = 0; j < run_count && i < count; j++, i++)
{
if (unlikely (p + HBUINT16::static_size > end)) return false;
deltas[i] = *(const HBINT16 *) p;
deltas.arrayZ[i] = * (const HBINT16 *) p;
p += HBUINT16::static_size;
}
}
else
{
if (unlikely (p + run_count > end)) return false;
for (j = 0; j < run_count && i < count; j++, i++)
{
if (unlikely (p + 1 > end)) return false;
deltas[i] = *(const HBINT8 *) p++;
deltas.arrayZ[i] = * (const HBINT8 *) p++;
}
}
if (j < run_count)
return false;