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[ot] Port ot font funcs to allocated object

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This commit is contained in:
Behdad Esfahbod 2015-11-04 20:43:59 -08:00
parent 44f8275080
commit 75ea2daa1d
1 changed files with 37 additions and 8 deletions
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45
src/hb-ot-font.cc
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@ -402,22 +402,51 @@ hb_ot_get_glyph_from_name (hb_font_t *font HB_UNUSED,
}
static hb_font_funcs_t *static_ot_funcs = NULL;
#ifdef HB_USE_ATEXIT
static
void free_static_ot_funcs (void)
{
hb_font_funcs_destroy (static_ot_funcs);
}
#endif
static hb_font_funcs_t *
_hb_ot_get_font_funcs (void)
{
static const hb_font_funcs_t ot_ffuncs = {
HB_OBJECT_HEADER_STATIC,
true, /* immutable */
retry:
hb_font_funcs_t *funcs = (hb_font_funcs_t *) hb_atomic_ptr_get (&static_ot_funcs);
if (unlikely (!funcs))
{
#define HB_FONT_FUNC_IMPLEMENT(name) hb_ot_get_##name,
HB_FONT_FUNCS_IMPLEMENT_CALLBACKS
#undef HB_FONT_FUNC_IMPLEMENT
funcs = hb_font_funcs_create ();
hb_font_funcs_set_glyph_func (funcs, hb_ot_get_glyph, NULL, NULL);
hb_font_funcs_set_glyph_h_advance_func (funcs, hb_ot_get_glyph_h_advance, NULL, NULL);
hb_font_funcs_set_glyph_v_advance_func (funcs, hb_ot_get_glyph_v_advance, NULL, NULL);
hb_font_funcs_set_glyph_h_origin_func (funcs, hb_ot_get_glyph_h_origin, NULL, NULL);
hb_font_funcs_set_glyph_v_origin_func (funcs, hb_ot_get_glyph_v_origin, NULL, NULL);
hb_font_funcs_set_glyph_h_kerning_func (funcs, hb_ot_get_glyph_h_kerning, NULL, NULL);
hb_font_funcs_set_glyph_v_kerning_func (funcs, hb_ot_get_glyph_v_kerning, NULL, NULL);
hb_font_funcs_set_glyph_extents_func (funcs, hb_ot_get_glyph_extents, NULL, NULL);
hb_font_funcs_set_glyph_contour_point_func (funcs, hb_ot_get_glyph_contour_point, NULL, NULL);
hb_font_funcs_set_glyph_name_func (funcs, hb_ot_get_glyph_name, NULL, NULL);
hb_font_funcs_set_glyph_from_name_func (funcs, hb_ot_get_glyph_from_name, NULL, NULL);
hb_font_funcs_make_immutable (funcs);
if (!hb_atomic_ptr_cmpexch (&static_ot_funcs, NULL, funcs)) {
hb_font_funcs_destroy (funcs);
goto retry;
}
#ifdef HB_USE_ATEXIT
atexit (free_static_ot_funcs); /* First person registers atexit() callback. */
#endif
};
return const_cast<hb_font_funcs_t *> (&ot_ffuncs);
return funcs;
}