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#ifndef OT_LAYOUT_GPOS_ANCHORFORMAT3_HH
#define OT_LAYOUT_GPOS_ANCHORFORMAT3_HH
namespace OT {
namespace Layout {
namespace GPOS_impl {
struct AnchorFormat3
{
protected:
HBUINT16 format; /* Format identifier--format = 3 */
FWORD xCoordinate; /* Horizontal value--in design units */
FWORD yCoordinate; /* Vertical value--in design units */
Offset16To<Device>
xDeviceTable; /* Offset to Device table for X
* coordinate-- from beginning of
* Anchor table (may be NULL) */
Offset16To<Device>
yDeviceTable; /* Offset to Device table for Y
* coordinate-- from beginning of
* Anchor table (may be NULL) */
public:
DEFINE_SIZE_STATIC (10);
bool sanitize (hb_sanitize_context_t *c) const
{
TRACE_SANITIZE (this);
if (unlikely (!c->check_struct (this))) return_trace (false);
return_trace (xDeviceTable.sanitize (c, this) && yDeviceTable.sanitize (c, this));
}
void get_anchor (hb_ot_apply_context_t *c, hb_codepoint_t glyph_id HB_UNUSED,
float *x, float *y) const
{
hb_font_t *font = c->font;
*x = font->em_fscale_x (xCoordinate);
*y = font->em_fscale_y (yCoordinate);
if ((font->x_ppem || font->num_coords) && xDeviceTable.sanitize (&c->sanitizer, this))
{
hb_barrier ();
*x += (this+xDeviceTable).get_x_delta (font, c->var_store, c->var_store_cache);
}
if ((font->y_ppem || font->num_coords) && yDeviceTable.sanitize (&c->sanitizer, this))
{
hb_barrier ();
*y += (this+yDeviceTable).get_y_delta (font, c->var_store, c->var_store_cache);
}
}
bool subset (hb_subset_context_t *c) const
{
TRACE_SUBSET (this);
auto *out = c->serializer->start_embed (*this);
if (unlikely (!c->serializer->embed (format))) return_trace (false);
if (unlikely (!c->serializer->embed (xCoordinate))) return_trace (false);
if (unlikely (!c->serializer->embed (yCoordinate))) return_trace (false);
unsigned x_varidx = xDeviceTable ? (this+xDeviceTable).get_variation_index () : HB_OT_LAYOUT_NO_VARIATIONS_INDEX;
if (x_varidx != HB_OT_LAYOUT_NO_VARIATIONS_INDEX)
{
hb_pair_t<unsigned, int> *new_varidx_delta;
if (!c->plan->layout_variation_idx_delta_map.has (x_varidx, &new_varidx_delta))
return_trace (false);
x_varidx = hb_first (*new_varidx_delta);
int delta = hb_second (*new_varidx_delta);
if (delta != 0)
{
if (!c->serializer->check_assign (out->xCoordinate, xCoordinate + delta,
HB_SERIALIZE_ERROR_INT_OVERFLOW))
return_trace (false);
}
}
unsigned y_varidx = yDeviceTable ? (this+yDeviceTable).get_variation_index () : HB_OT_LAYOUT_NO_VARIATIONS_INDEX;
if (y_varidx != HB_OT_LAYOUT_NO_VARIATIONS_INDEX)
{
hb_pair_t<unsigned, int> *new_varidx_delta;
if (!c->plan->layout_variation_idx_delta_map.has (y_varidx, &new_varidx_delta))
return_trace (false);
y_varidx = hb_first (*new_varidx_delta);
int delta = hb_second (*new_varidx_delta);
if (delta != 0)
{
if (!c->serializer->check_assign (out->yCoordinate, yCoordinate + delta,
HB_SERIALIZE_ERROR_INT_OVERFLOW))
return_trace (false);
}
}
/* in case that all axes are pinned or no variations after instantiation,
* both var_idxes will be mapped to HB_OT_LAYOUT_NO_VARIATIONS_INDEX */
if (x_varidx == HB_OT_LAYOUT_NO_VARIATIONS_INDEX &&
y_varidx == HB_OT_LAYOUT_NO_VARIATIONS_INDEX)
return_trace (c->serializer->check_assign (out->format, 1, HB_SERIALIZE_ERROR_INT_OVERFLOW));
if (!c->serializer->embed (xDeviceTable)) return_trace (false);
if (!c->serializer->embed (yDeviceTable)) return_trace (false);
out->xDeviceTable.serialize_copy (c->serializer, xDeviceTable, this, 0, hb_serialize_context_t::Head, &c->plan->layout_variation_idx_delta_map);
out->yDeviceTable.serialize_copy (c->serializer, yDeviceTable, this, 0, hb_serialize_context_t::Head, &c->plan->layout_variation_idx_delta_map);
return_trace (out);
}
void collect_variation_indices (hb_collect_variation_indices_context_t *c) const
{
(this+xDeviceTable).collect_variation_indices (c);
(this+yDeviceTable).collect_variation_indices (c);
}
};
}
}
}
#endif // OT_LAYOUT_GPOS_ANCHORFORMAT3_HH
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