| #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)) |
| *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)) |
| *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 (c->plan->layout_variation_idx_delta_map.has (x_varidx)) |
| { |
| int delta = hb_second (c->plan->layout_variation_idx_delta_map.get (x_varidx)); |
| 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 (c->plan->layout_variation_idx_delta_map.has (y_varidx)) |
| { |
| int delta = hb_second (c->plan->layout_variation_idx_delta_map.get (y_varidx)); |
| if (delta != 0) |
| { |
| if (!c->serializer->check_assign (out->yCoordinate, yCoordinate + delta, |
| HB_SERIALIZE_ERROR_INT_OVERFLOW)) |
| return_trace (false); |
| } |
| } |
| |
| if (c->plan->all_axes_pinned) |
| 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 |