98 lines
2.5 KiB
C++
98 lines
2.5 KiB
C++
#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 allocated;
|
|
|
|
bool serialize (hb_serialize_context_t *c,
|
|
bool use_short_loca,
|
|
const hb_subset_plan_t *plan)
|
|
{
|
|
TRACE_SERIALIZE (this);
|
|
|
|
hb_bytes_t dest_glyph = dest_start.copy (c);
|
|
hb_bytes_t end_copy = dest_end.copy (c);
|
|
if (!end_copy.arrayZ || !dest_glyph.arrayZ) {
|
|
return false;
|
|
}
|
|
|
|
dest_glyph = hb_bytes_t (&dest_glyph, dest_glyph.length + end_copy.length);
|
|
unsigned int pad_length = use_short_loca ? padding () : 0;
|
|
DEBUG_MSG (SUBSET, nullptr, "serialize %u byte glyph, width %u pad %u", 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)
|
|
{
|
|
allocated = source_glyph.compile_bytes_with_deltas (plan, font, glyf, dest_start, dest_end);
|
|
return allocated;
|
|
}
|
|
|
|
void free_compiled_bytes ()
|
|
{
|
|
if (likely (allocated)) {
|
|
allocated = false;
|
|
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 */
|