ReceiveTempSMS
/
Sweden-Number
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

dwrite: Implement mark-to-base attachment, GPOS lookup 4. 

Signed-off-by: Nikolay Sivov <nsivov@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Nikolay Sivov 2019-02-01 13:48:12 +03:00 committed by Alexandre Julliard
parent d1642df049
commit e166ab8b18
1 changed files with 105 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

105
dlls/dwrite/opentype.c
View File

@ -653,6 +653,34 @@ struct ot_gpos_cursive_format1
WORD anchors[1];
};
struct ot_gpos_mark_record
{
WORD mark_class;
WORD mark_anchor;
};
struct ot_gpos_mark_array
{
WORD count;
struct ot_gpos_mark_record records[1];
};
struct ot_gpos_base_array
{
WORD count;
WORD offsets[1];
};
struct ot_gpos_mark_to_base_format1
{
WORD format;
WORD mark_coverage;
WORD base_coverage;
WORD mark_class_count;
WORD mark_array;
WORD base_array;
};
typedef struct {
WORD SubstFormat;
WORD Coverage;
@ -3386,6 +3414,83 @@ static BOOL opentype_layout_apply_gpos_cursive_attachment(struct scriptshaping_c
static BOOL opentype_layout_apply_gpos_mark_to_base_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_base_format1 *format1 = table_read_ensure(&cache->gpos.table, subtable_offset,
sizeof(*format1));
unsigned int mark_class_count, count, mark_array_offset, base_array_offset;
const struct ot_gpos_mark_array *mark_array;
const struct ot_gpos_base_array *base_array;
float mark_x, mark_y, base_x, base_y;
unsigned int base_index, mark_index;
struct glyph_iterator base_iter;
unsigned int base_anchor;
if (!format1)
continue;
mark_array_offset = subtable_offset + GET_BE_WORD(format1->mark_array);
if (!(count = table_read_be_word(&cache->gpos.table, mark_array_offset)))
continue;
mark_array = table_read_ensure(&cache->gpos.table, mark_array_offset,
FIELD_OFFSET(struct ot_gpos_mark_array, records[count]));
if (!mark_array)
continue;
base_array_offset = subtable_offset + GET_BE_WORD(format1->base_array);
if (!(count = table_read_be_word(&cache->gpos.table, base_array_offset)))
continue;
base_array = table_read_ensure(&cache->gpos.table, base_array_offset,
FIELD_OFFSET(struct ot_gpos_base_array, offsets[count * GET_BE_WORD(format1->mark_class_count)]));
if (!base_array)
continue;
mark_class_count = GET_BE_WORD(format1->mark_class_count);
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 || mark_index >= GET_BE_WORD(mark_array->count))
continue;
/* Look back for first base glyph. */
glyph_iterator_init(context, LOOKUP_FLAG_IGNORE_MARKS, iter->pos, 1, &base_iter);
if (!glyph_iterator_prev(&base_iter))
continue;
base_index = opentype_layout_is_glyph_covered(&cache->gpos.table, subtable_offset +
GET_BE_WORD(format1->base_coverage), context->u.pos.glyphs[base_iter.pos]);
if (base_index == GLYPH_NOT_COVERED || base_index >= GET_BE_WORD(base_array->count))
continue;
base_anchor = GET_BE_WORD(base_array->offsets[base_index * mark_class_count +
GET_BE_WORD(mark_array->records[mark_index].mark_class)]);
opentype_layout_gpos_get_anchor(context, mark_array_offset +
GET_BE_WORD(mark_array->records[mark_index].mark_anchor), iter->pos, &mark_x, &mark_y);
opentype_layout_gpos_get_anchor(context, base_array_offset + base_anchor, base_iter.pos, &base_x, &base_y);
context->offsets[iter->pos].advanceOffset = (context->is_rtl ? -1.0f : 1.0f) * (base_x - mark_x);
context->offsets[iter->pos].ascenderOffset = base_y - mark_y;
break;
}
else
WARN("Unknown mark-to-base format %u.\n", format);
}
return FALSE;
}