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Infrastructure for creating CTFont with correct font size 

https://github.com/behdad/harfbuzz/issues/360
This commit is contained in:
Behdad Esfahbod 2017-10-11 12:43:46 +02:00
parent 16d02a58cf
commit 8d450dd188
1 changed files with 12 additions and 0 deletions
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12
src/hb-shaper-private.hh
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@ -88,11 +88,23 @@ struct hb_shaper_data_t {
HB_SHAPER_DATA_DESTROY_FUNC (shaper, object) (data);
#define HB_SHAPER_DATA_ENSURE_DEFINE(shaper, object) \
HB_SHAPER_DATA_ENSURE_DEFINE_WITH_CONDITION(shaper, object, true)
#define HB_SHAPER_DATA_ENSURE_DEFINE_WITH_CONDITION(shaper, object, condition) \
bool \
HB_SHAPER_DATA_ENSURE_FUNC(shaper, object) (hb_##object##_t *object) \
{\
retry: \
HB_SHAPER_DATA_TYPE (shaper, object) *data = (HB_SHAPER_DATA_TYPE (shaper, object) *) hb_atomic_ptr_get (&HB_SHAPER_DATA (shaper, object)); \
if (likely (data) && !(condition)) { \
/* Drop and recreate. */ \
/* If someone dropped it in the mean time, throw it away and don't touch it. \
* Otherwise, destruct it. */ \
if (hb_atomic_ptr_cmpexch (&HB_SHAPER_DATA (shaper, object), data, NULL)) { \
HB_SHAPER_DATA_DESTROY_FUNC (shaper, object) (data); \
} \
goto retry; \
} \
if (unlikely (!data)) { \
data = HB_SHAPER_DATA_CREATE_FUNC (shaper, object) (object); \
if (unlikely (!data)) \