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[subset] Add hdmx subsetting implementation.

This commit is contained in:
Garret Rieger 2018-02-21 16:00:10 -08:00
parent 84b68e5886
commit 6704cded65
1 changed files with 26 additions and 3 deletions
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27
src/hb-ot-hdmx-table.hh
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@ -128,17 +128,40 @@ struct hdmx
return_trace (true);
}
static inline unsigned int get_subsetted_size (hb_subset_plan_t *plan)
static inline size_t get_subsetted_size (hb_subset_plan_t *plan)
{
return min_size + DeviceRecord::get_size (plan->gids_to_retain_sorted.len);
}
inline bool subset (hb_subset_plan_t *plan) const
{
// TODO(grieger)
size_t dest_size = get_subsetted_size (plan);
hdmx *dest = (hdmx *) malloc (dest_size);
if (unlikely (!dest))
{
DEBUG_MSG(SUBSET, nullptr, "Unable to alloc %lu for hdmx subset output.", (unsigned long) dest_size);
return false;
}
hb_serialize_context_t c (dest, dest_size);
hdmx *hdmx_prime = c.start_serialize<hdmx> ();
if (!hdmx_prime || !hdmx_prime->serialize (&c, this, plan)) {
free (dest);
return false;
}
c.end_serialize ();
hb_blob_t *hdmx_prime_blob = hb_blob_create ((const char *) dest,
dest_size,
HB_MEMORY_MODE_READONLY,
dest,
free);
bool result = hb_subset_plan_add_table (plan, HB_OT_TAG_hdmx, hdmx_prime_blob);
hb_blob_destroy (hdmx_prime_blob);
return result;
}
inline bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);