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#ifndef OT_GLYF_SUBSETGLYPH_HH
#define OT_GLYF_SUBSETGLYPH_HH
#include "../../hb-open-type.hh"
namespace OT {
struct glyf_accelerator_t;
namespace glyf_impl {
struct SubsetGlyph
{
hb_codepoint_t old_gid;
Glyph source_glyph;
hb_bytes_t dest_start; /* region of source_glyph to copy first */
hb_bytes_t dest_end; /* region of source_glyph to copy second */
bool serialize (hb_serialize_context_t *c,
bool use_short_loca,
const hb_subset_plan_t *plan,
hb_font_t *font)
{
TRACE_SERIALIZE (this);
if (font)
{
const OT::glyf_accelerator_t &glyf = *font->face->table.glyf;
if (!this->compile_bytes_with_deltas (plan, font, glyf))
return_trace (false);
}
hb_bytes_t dest_glyph = dest_start.copy (c);
dest_glyph = hb_bytes_t (&dest_glyph, dest_glyph.length + dest_end.copy (c).length);
unsigned int pad_length = use_short_loca ? padding () : 0;
DEBUG_MSG (SUBSET, nullptr, "serialize %d byte glyph, width %d pad %d", dest_glyph.length, dest_glyph.length + pad_length, pad_length);
HBUINT8 pad;
pad = 0;
while (pad_length > 0)
{
c->embed (pad);
pad_length--;
}
if (unlikely (!dest_glyph.length)) return_trace (true);
/* update components gids */
for (auto &_ : Glyph (dest_glyph).get_composite_iterator ())
{
hb_codepoint_t new_gid;
if (plan->new_gid_for_old_gid (_.get_gid(), &new_gid))
const_cast<CompositeGlyphRecord &> (_).set_gid (new_gid);
}
if (plan->flags & HB_SUBSET_FLAGS_NO_HINTING)
Glyph (dest_glyph).drop_hints ();
if (plan->flags & HB_SUBSET_FLAGS_SET_OVERLAPS_FLAG)
Glyph (dest_glyph).set_overlaps_flag ();
return_trace (true);
}
bool compile_bytes_with_deltas (const hb_subset_plan_t *plan,
hb_font_t *font,
const glyf_accelerator_t &glyf)
{ return source_glyph.compile_bytes_with_deltas (plan, font, glyf, dest_start, dest_end); }
void free_compiled_bytes ()
{
dest_start.fini ();
dest_end.fini ();
}
void drop_hints_bytes ()
{ source_glyph.drop_hints_bytes (dest_start, dest_end); }
unsigned int length () const { return dest_start.length + dest_end.length; }
/* pad to 2 to ensure 2-byte loca will be ok */
unsigned int padding () const { return length () % 2; }
unsigned int padded_size () const { return length () + padding (); }
};
} /* namespace glyf_impl */
} /* namespace OT */
#endif /* OT_GLYF_SUBSETGLYPH_HH */
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