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[subset/cff] Speed up offset writing

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This commit is contained in:
Behdad Esfahbod 2023-06-08 17:16:53 -06:00
parent c85ca75eff
commit da2e2c8c25
1 changed files with 52 additions and 0 deletions
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52
src/hb-ot-cff-common.hh
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@ -109,6 +109,7 @@ struct CFFIndex
/* serialize indices */
unsigned int offset = 1;
#ifdef HB_OPTIMIZE_SIZE
unsigned int i = 0;
for (unsigned _ : +it)
{
@ -116,6 +117,57 @@ struct CFFIndex
offset += _;
}
set_offset_at (i, offset);
#else
switch (off_size)
{
case 1:
{
HBUINT8 *p = (HBUINT8 *) offsets;
for (unsigned _ : +it)
{
*p++ = offset;
offset += _;
}
*p = offset;
}
break;
case 2:
{
HBUINT16 *p = (HBUINT16 *) offsets;
for (unsigned _ : +it)
{
*p++ = offset;
offset += _;
}
*p = offset;
}
break;
case 3:
{
HBUINT24 *p = (HBUINT24 *) offsets;
for (unsigned _ : +it)
{
*p++ = offset;
offset += _;
}
*p = offset;
}
break;
case 4:
{
HBUINT32 *p = (HBUINT32 *) offsets;
for (unsigned _ : +it)
{
*p++ = offset;
offset += _;
}
*p = offset;
}
break;
default:
break;
}
#endif
return_trace (total);
}