Module: wine Branch: master Commit: 240305660ab2c33043dfb451b5a05c5a16119d49 URL: https://source.winehq.org/git/wine.git/?a=commit;h=240305660ab2c33043dfb451b...
Author: Nikolay Sivov nsivov@codeweavers.com Date: Tue Jun 16 14:56:40 2020 +0300
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
---
dlls/dwrite/opentype.c | 88 ++++++++++++++++++++++++++++++++++++++++++++------ 1 file changed, 79 insertions(+), 9 deletions(-)
diff --git a/dlls/dwrite/opentype.c b/dlls/dwrite/opentype.c index d7099b8adf..61dcf1aca4 100644 --- a/dlls/dwrite/opentype.c +++ b/dlls/dwrite/opentype.c @@ -4135,6 +4135,51 @@ static BOOL opentype_layout_apply_gpos_cursive_attachment(struct scriptshaping_c return TRUE; }
+static BOOL opentype_layout_apply_mark_array(struct scriptshaping_context *context, unsigned int subtable_offset, + unsigned int mark_array, unsigned int mark_index, unsigned int glyph_index, unsigned int anchors_matrix, + unsigned int class_count, unsigned int glyph_pos) +{ + const struct dwrite_fonttable *table = &context->table->table; + unsigned int mark_class, mark_count, glyph_count; + const struct ot_gpos_mark_record *record; + float mark_x, mark_y, base_x, base_y; + const UINT16 *anchors; + + mark_count = table_read_be_word(table, subtable_offset + mark_array); + if (mark_index >= mark_count) return FALSE; + + if (!(record = table_read_ensure(table, subtable_offset + mark_array + + FIELD_OFFSET(struct ot_gpos_mark_array, records[mark_index]), sizeof(*record)))) + { + return FALSE; + } + + mark_class = GET_BE_WORD(record->mark_class); + if (mark_class >= class_count) return FALSE; + + glyph_count = table_read_be_word(table, subtable_offset + anchors_matrix); + if (glyph_index >= glyph_count) return FALSE; + + /* Anchors data is stored as two dimensional array [glyph_count][class_count], starting with row count field. */ + anchors = table_read_ensure(table, subtable_offset + anchors_matrix + 2, glyph_count * class_count * sizeof(*anchors)); + if (!anchors) return FALSE; + + opentype_layout_gpos_get_anchor(context, subtable_offset + mark_array + GET_BE_WORD(record->mark_anchor), + context->cur, &mark_x, &mark_y); + opentype_layout_gpos_get_anchor(context, subtable_offset + anchors_matrix + + GET_BE_WORD(anchors[glyph_index * class_count + mark_class]), glyph_pos, &base_x, &base_y); + + if (context->is_rtl) + context->offsets[context->cur].advanceOffset = mark_x - base_x; + else + context->offsets[context->cur].advanceOffset = -context->advances[glyph_pos] + base_x - mark_x; + + context->offsets[context->cur].ascenderOffset = base_y - mark_y; + context->cur++; + + return TRUE; +} + static BOOL opentype_layout_apply_gpos_mark_to_base_attachment(struct scriptshaping_context *context, const struct lookup *lookup, unsigned int subtable_offset) { @@ -4213,6 +4258,18 @@ static BOOL opentype_layout_apply_gpos_mark_to_base_attachment(struct scriptshap return TRUE; }
+static BOOL table_read_array_be_word(const struct dwrite_fonttable *table, unsigned int offset, + unsigned int index, UINT16 *data) +{ + unsigned int count = table_read_be_word(table, offset); + const UINT16 *array; + + if (index >= count) return FALSE; + if (!(array = table_read_ensure(table, offset + 2, count * sizeof(*array)))) return FALSE; + *data = GET_BE_WORD(array[index]); + return TRUE; +} + static BOOL opentype_layout_apply_gpos_mark_to_lig_attachment(struct scriptshaping_context *context, const struct lookup *lookup, unsigned int subtable_offset) { @@ -4223,17 +4280,17 @@ static BOOL opentype_layout_apply_gpos_mark_to_lig_attachment(struct scriptshapi
if (format == 1) { - const struct ot_gpos_mark_to_lig_format1 *format1 = table_read_ensure(table, subtable_offset, sizeof(*format1)); - unsigned int mark_index, lig_index; + unsigned int mark_index, lig_index, comp_index, class_count, comp_count; + const struct ot_gpos_mark_to_lig_format1 *format1; struct glyph_iterator lig_iter; + unsigned int lig_array; + UINT16 lig_attach;
- if (!format1) - return FALSE; + if (!(format1 = table_read_ensure(table, subtable_offset, sizeof(*format1)))) return FALSE;
mark_index = opentype_layout_is_glyph_covered(table, subtable_offset + GET_BE_WORD(format1->mark_coverage), context->u.pos.glyphs[context->cur]); - if (mark_index == GLYPH_NOT_COVERED) - return FALSE; + if (mark_index == GLYPH_NOT_COVERED) return FALSE;
glyph_iterator_init(context, LOOKUP_FLAG_IGNORE_MARKS, context->cur, 1, &lig_iter); if (!glyph_iterator_prev(&lig_iter)) @@ -4241,10 +4298,23 @@ static BOOL opentype_layout_apply_gpos_mark_to_lig_attachment(struct scriptshapi
lig_index = opentype_layout_is_glyph_covered(table, subtable_offset + GET_BE_WORD(format1->lig_coverage), context->u.pos.glyphs[lig_iter.pos]); - if (lig_index == GLYPH_NOT_COVERED) - return FALSE; + if (lig_index == GLYPH_NOT_COVERED) return FALSE; + + class_count = GET_BE_WORD(format1->mark_class_count); + + lig_array = GET_BE_WORD(format1->lig_array); + + if (!table_read_array_be_word(table, subtable_offset + lig_array, lig_index, &lig_attach)) return FALSE; + + comp_count = table_read_be_word(table, subtable_offset + lig_array + lig_attach); + if (!comp_count) return FALSE; + + comp_index = context->u.buffer.glyph_props[lig_iter.pos].components - + context->u.buffer.glyph_props[context->cur].lig_component - 1; + if (comp_index >= comp_count) return FALSE;
- FIXME("Unimplemented.\n"); + return opentype_layout_apply_mark_array(context, subtable_offset, GET_BE_WORD(format1->mark_array), mark_index, + comp_index, lig_array + lig_attach, class_count, lig_iter.pos); } else WARN("Unknown mark-to-ligature format %u.\n", format);