dwrite: Implement mark to ligature attachment (GPOS lookup 5).
Signed-off-by: Nikolay Sivov <nsivov@codeweavers.com> Signed-off-by: Alexandre Julliard <julliard@winehq.org>
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@ -4135,6 +4135,51 @@ static BOOL opentype_layout_apply_gpos_cursive_attachment(struct scriptshaping_c
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return TRUE;
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}
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static BOOL opentype_layout_apply_mark_array(struct scriptshaping_context *context, unsigned int subtable_offset,
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unsigned int mark_array, unsigned int mark_index, unsigned int glyph_index, unsigned int anchors_matrix,
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unsigned int class_count, unsigned int glyph_pos)
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{
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const struct dwrite_fonttable *table = &context->table->table;
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unsigned int mark_class, mark_count, glyph_count;
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const struct ot_gpos_mark_record *record;
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float mark_x, mark_y, base_x, base_y;
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const UINT16 *anchors;
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mark_count = table_read_be_word(table, subtable_offset + mark_array);
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if (mark_index >= mark_count) return FALSE;
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if (!(record = table_read_ensure(table, subtable_offset + mark_array +
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FIELD_OFFSET(struct ot_gpos_mark_array, records[mark_index]), sizeof(*record))))
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{
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return FALSE;
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}
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mark_class = GET_BE_WORD(record->mark_class);
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if (mark_class >= class_count) return FALSE;
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glyph_count = table_read_be_word(table, subtable_offset + anchors_matrix);
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if (glyph_index >= glyph_count) return FALSE;
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/* Anchors data is stored as two dimensional array [glyph_count][class_count], starting with row count field. */
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anchors = table_read_ensure(table, subtable_offset + anchors_matrix + 2, glyph_count * class_count * sizeof(*anchors));
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if (!anchors) return FALSE;
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opentype_layout_gpos_get_anchor(context, subtable_offset + mark_array + GET_BE_WORD(record->mark_anchor),
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context->cur, &mark_x, &mark_y);
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opentype_layout_gpos_get_anchor(context, subtable_offset + anchors_matrix +
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GET_BE_WORD(anchors[glyph_index * class_count + mark_class]), glyph_pos, &base_x, &base_y);
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if (context->is_rtl)
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context->offsets[context->cur].advanceOffset = mark_x - base_x;
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else
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context->offsets[context->cur].advanceOffset = -context->advances[glyph_pos] + base_x - mark_x;
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context->offsets[context->cur].ascenderOffset = base_y - mark_y;
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context->cur++;
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return TRUE;
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}
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static BOOL opentype_layout_apply_gpos_mark_to_base_attachment(struct scriptshaping_context *context,
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const struct lookup *lookup, unsigned int subtable_offset)
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{
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@ -4213,6 +4258,18 @@ static BOOL opentype_layout_apply_gpos_mark_to_base_attachment(struct scriptshap
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return TRUE;
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}
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static BOOL table_read_array_be_word(const struct dwrite_fonttable *table, unsigned int offset,
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unsigned int index, UINT16 *data)
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{
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unsigned int count = table_read_be_word(table, offset);
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const UINT16 *array;
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if (index >= count) return FALSE;
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if (!(array = table_read_ensure(table, offset + 2, count * sizeof(*array)))) return FALSE;
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*data = GET_BE_WORD(array[index]);
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return TRUE;
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}
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static BOOL opentype_layout_apply_gpos_mark_to_lig_attachment(struct scriptshaping_context *context,
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const struct lookup *lookup, unsigned int subtable_offset)
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{
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@ -4223,17 +4280,17 @@ static BOOL opentype_layout_apply_gpos_mark_to_lig_attachment(struct scriptshapi
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if (format == 1)
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{
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const struct ot_gpos_mark_to_lig_format1 *format1 = table_read_ensure(table, subtable_offset, sizeof(*format1));
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unsigned int mark_index, lig_index;
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unsigned int mark_index, lig_index, comp_index, class_count, comp_count;
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const struct ot_gpos_mark_to_lig_format1 *format1;
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struct glyph_iterator lig_iter;
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unsigned int lig_array;
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UINT16 lig_attach;
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if (!format1)
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return FALSE;
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if (!(format1 = table_read_ensure(table, subtable_offset, sizeof(*format1)))) return FALSE;
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mark_index = opentype_layout_is_glyph_covered(table, subtable_offset + GET_BE_WORD(format1->mark_coverage),
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context->u.pos.glyphs[context->cur]);
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if (mark_index == GLYPH_NOT_COVERED)
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return FALSE;
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if (mark_index == GLYPH_NOT_COVERED) return FALSE;
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glyph_iterator_init(context, LOOKUP_FLAG_IGNORE_MARKS, context->cur, 1, &lig_iter);
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if (!glyph_iterator_prev(&lig_iter))
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@ -4241,10 +4298,23 @@ static BOOL opentype_layout_apply_gpos_mark_to_lig_attachment(struct scriptshapi
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lig_index = opentype_layout_is_glyph_covered(table, subtable_offset + GET_BE_WORD(format1->lig_coverage),
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context->u.pos.glyphs[lig_iter.pos]);
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if (lig_index == GLYPH_NOT_COVERED)
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return FALSE;
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if (lig_index == GLYPH_NOT_COVERED) return FALSE;
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FIXME("Unimplemented.\n");
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class_count = GET_BE_WORD(format1->mark_class_count);
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lig_array = GET_BE_WORD(format1->lig_array);
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if (!table_read_array_be_word(table, subtable_offset + lig_array, lig_index, &lig_attach)) return FALSE;
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comp_count = table_read_be_word(table, subtable_offset + lig_array + lig_attach);
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if (!comp_count) return FALSE;
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comp_index = context->u.buffer.glyph_props[lig_iter.pos].components -
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context->u.buffer.glyph_props[context->cur].lig_component - 1;
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if (comp_index >= comp_count) return FALSE;
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return opentype_layout_apply_mark_array(context, subtable_offset, GET_BE_WORD(format1->mark_array), mark_index,
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comp_index, lig_array + lig_attach, class_count, lig_iter.pos);
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}
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else
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WARN("Unknown mark-to-ligature format %u.\n", format);
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