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dwrite: Simplify ligature substitution handler. 

Signed-off-by: Nikolay Sivov <nsivov@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Nikolay Sivov 2020-06-17 14:47:54 +03:00 committed by Alexandre Julliard
parent 5909ab5303
commit f5e342b2a6
1 changed files with 16 additions and 25 deletions
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41
dlls/dwrite/opentype.c
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@ -5119,46 +5119,37 @@ static BOOL opentype_layout_apply_ligature(struct scriptshaping_context *context
static BOOL opentype_layout_apply_gsub_lig_substitution(struct scriptshaping_context *context, const struct lookup *lookup,
unsigned int subtable_offset)
{
const struct dwrite_fonttable *gsub = &context->table->table;
unsigned int coverage_index, offset, lig_set_offset, lig_set_count;
UINT16 format, coverage, glyph;
const struct dwrite_fonttable *table = &context->table->table;
UINT16 format, coverage, glyph, lig_set_offset;
unsigned int coverage_index;
glyph = context->u.subst.glyphs[context->cur];
format = table_read_be_word(gsub, subtable_offset);
format = table_read_be_word(table, subtable_offset);
if (format == 1)
{
const struct ot_gsub_ligsubst_format1 *format1 = table_read_ensure(gsub, subtable_offset, sizeof(*format1));
const struct ot_gsub_ligset *lig_set;
unsigned int i, lig_count;
const struct ot_gsub_ligsubst_format1 *format1 = table_read_ensure(table, subtable_offset, sizeof(*format1));
unsigned int i;
const UINT16 *offsets;
UINT16 lig_count;
coverage = table_read_be_word(gsub, subtable_offset + FIELD_OFFSET(struct ot_gsub_ligsubst_format1, coverage));
coverage = table_read_be_word(table, subtable_offset + FIELD_OFFSET(struct ot_gsub_ligsubst_format1, coverage));
coverage_index = opentype_layout_is_glyph_covered(gsub, subtable_offset + coverage, glyph);
if (coverage_index == GLYPH_NOT_COVERED)
coverage_index = opentype_layout_is_glyph_covered(table, subtable_offset + coverage, glyph);
if (coverage_index == GLYPH_NOT_COVERED) return FALSE;
if (!table_read_array_be_word(table, subtable_offset + FIELD_OFFSET(struct ot_gsub_ligsubst_format1, lig_set_count),
coverage_index, &lig_set_offset))
return FALSE;
lig_set_count = table_read_be_word(gsub, subtable_offset + FIELD_OFFSET(struct ot_gsub_ligsubst_format1, lig_set_count));
if (coverage_index >= lig_set_count || !table_read_ensure(gsub, subtable_offset,
FIELD_OFFSET(struct ot_gsub_ligsubst_format1, lig_sets[lig_set_count])))
{
return FALSE;
}
lig_set_offset = table_read_be_word(gsub, subtable_offset +
FIELD_OFFSET(struct ot_gsub_ligsubst_format1, lig_sets[coverage_index]));
offset = subtable_offset + lig_set_offset;
lig_count = table_read_be_word(gsub, offset);
lig_set = table_read_ensure(gsub, offset, FIELD_OFFSET(struct ot_gsub_ligset, offsets[lig_count]));
if (!lig_count || !lig_set)
if (!(offsets = table_read_array_be_word(table, subtable_offset + lig_set_offset, ~0u, &lig_count)))
return FALSE;
/* First applicable ligature is used. */
for (i = 0; i < lig_count; ++i)
{
if (opentype_layout_apply_ligature(context, offset + GET_BE_WORD(lig_set->offsets[i]), lookup))
if (opentype_layout_apply_ligature(context, subtable_offset + lig_set_offset + GET_BE_WORD(offsets[i]), lookup))
return TRUE;
}
}