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[instancer] add a flag HB_SUBSET_FLAGS_IUP_DELTA_OPT

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This commit is contained in:
Qunxin Liu 2024-01-26 09:27:27 -08:00
parent 93a148cde6
commit c7a6030b31
2 changed files with 4 additions and 0 deletions
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3
src/hb-subset.h
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@ -76,6 +76,8 @@ typedef struct hb_subset_plan_t hb_subset_plan_t;
* @HB_SUBSET_FLAGS_IFTB_REQUIREMENTS: If set enforce requirements on the output subset
* to allow it to be used with incremental font transfer IFTB patches. Primarily,
* this forces all outline data to use long (32 bit) offsets. Since: EXPERIMENTAL
* @HB_SUBSET_FLAGS_IUP_DELTA_OPT: If set perform IUP delta optimization on the
* remaining gvar table's deltas. Since: EXPERIMENTAL
*
* List of boolean properties that can be configured on the subset input.
*
@ -95,6 +97,7 @@ typedef enum { /*< flags >*/
HB_SUBSET_FLAGS_NO_LAYOUT_CLOSURE = 0x00000200u,
#ifdef HB_EXPERIMENTAL_API
HB_SUBSET_FLAGS_IFTB_REQUIREMENTS = 0x00000400u,
HB_SUBSET_FLAGS_IUP_DELTA_OPT = 0x00000800u,
#endif
} hb_subset_flags_t;

1
util/hb-subset.cc
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@ -963,6 +963,7 @@ subset_main_t::add_options ()
"If set preprocesses the face with the add accelerator option before actually subsetting.", nullptr},
#ifdef HB_EXPERIMENTAL_API
{"iftb-requirements", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK, (gpointer) &set_flag<HB_SUBSET_FLAGS_IFTB_REQUIREMENTS>, "Enforce requirements needed to use the subset with incremental font transfer IFTB patches.", nullptr},
{"optimize", 0, G_OPTION_FLAG_NO_ARG, G_OPTION_ARG_CALLBACK, (gpointer) &set_flag<HB_SUBSET_FLAGS_IUP_DELTA_OPT>, "perform IUP delta optimization on the remaining gvar table's deltas", nullptr},
#endif
{nullptr}
};