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[coord-setter] Reduce malloc pressure

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~15% speedup benchmark-font draw of varc-hanzi.ttf
This commit is contained in:
Behdad Esfahbod 2025-02-24 20:07:59 -07:00
parent 76c3beaf36
commit 0a1b26b862
1 changed files with 31 additions and 7 deletions
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38
src/OT/Var/VARC/coord-setter.hh
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@ -11,22 +11,46 @@ namespace OT {
struct coord_setter_t
{
coord_setter_t (hb_array_t<const int> coords) :
coords (coords) {}
coord_setter_t (hb_array_t<const int> coords_)
{
length = coords_.length;
if (length <= ARRAY_LENGTH (static_coords))
hb_memcpy (static_coords, coords_.arrayZ, length * sizeof (int));
else
dynamic_coords.extend (coords_);
}
int& operator [] (unsigned idx)
{
if (unlikely (idx >= HB_VAR_COMPOSITE_MAX_AXES))
return Crap(int);
if (coords.length < idx + 1)
coords.resize (idx + 1);
return coords[idx];
if (length <= ARRAY_LENGTH (static_coords))
{
if (idx < ARRAY_LENGTH (static_coords))
{
while (length <= idx)
static_coords[length++] = 0;
return static_coords[idx];
}
else
{
dynamic_coords.extend (hb_array (static_coords, length));
}
}
if (dynamic_coords.length <= idx &&
unlikely (!dynamic_coords.resize (idx + 1)))
return Crap(int);
return dynamic_coords.arrayZ[idx];
}
hb_array_t<int> get_coords ()
{ return coords.as_array (); }
{ return dynamic_coords ? dynamic_coords.as_array () : hb_array (static_coords, length); }
hb_vector_t<int> coords;
unsigned length;
int static_coords[32];
hb_vector_t<int> dynamic_coords;
};