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dwrite: Add a stub for mark-to-ligature attachment handler. 

Signed-off-by: Nikolay Sivov <nsivov@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
stable
Nikolay Sivov 2019-02-05 12:18:42 +03:00 committed by Alexandre Julliard
parent 717030df10
commit cbf1207b88
1 changed files with 50 additions and 0 deletions
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50
dlls/dwrite/opentype.c
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@ -681,6 +681,16 @@ struct ot_gpos_mark_to_base_format1
WORD base_array;
};
struct ot_gpos_mark_to_lig_format1
{
WORD format;
WORD mark_coverage;
WORD lig_coverage;
WORD mark_class_count;
WORD mark_array;
WORD lig_array;
};
struct ot_gpos_mark_to_mark_format1
{
WORD format;
@ -3507,6 +3517,46 @@ static BOOL opentype_layout_apply_gpos_mark_to_base_attachment(const struct scri
static BOOL opentype_layout_apply_gpos_mark_to_lig_attachment(const struct scriptshaping_context *context,
struct glyph_iterator *iter, const struct lookup *lookup)
{
struct scriptshaping_cache *cache = context->cache;
unsigned int i;
WORD format;
for (i = 0; i < lookup->subtable_count; ++i)
{
unsigned int subtable_offset = opentype_layout_get_gpos_subtable(cache, lookup->offset, i);
format = table_read_be_word(&cache->gpos.table, subtable_offset);
if (format == 1)
{
const struct ot_gpos_mark_to_lig_format1 *format1 = table_read_ensure(&cache->gpos.table,
subtable_offset, sizeof(*format1));
unsigned int mark_index, lig_index;
struct glyph_iterator lig_iter;
if (!format1)
continue;
mark_index = opentype_layout_is_glyph_covered(&cache->gpos.table, subtable_offset +
GET_BE_WORD(format1->mark_coverage), context->u.pos.glyphs[iter->pos]);
if (mark_index == GLYPH_NOT_COVERED)
continue;
glyph_iterator_init(context, LOOKUP_FLAG_IGNORE_MARKS, iter->pos, 1, &lig_iter);
if (!glyph_iterator_prev(&lig_iter))
continue;
lig_index = opentype_layout_is_glyph_covered(&cache->gpos.table, subtable_offset +
GET_BE_WORD(format1->lig_coverage), context->u.pos.glyphs[lig_iter.pos]);
if (lig_index == GLYPH_NOT_COVERED)
continue;
FIXME("Unimplemented.\n");
}
else
WARN("Unknown mark-to-ligature format %u.\n", format);
}
return FALSE;
}