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dwrite: Add a helper to collect gsub/gpos lookups. 

Signed-off-by: Nikolay Sivov <nsivov@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Nikolay Sivov 2020-05-04 11:29:33 +03:00 committed by Alexandre Julliard
parent bd6a500ab0
commit 5eb742687d
2 changed files with 57 additions and 30 deletions
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81
dlls/dwrite/opentype.c
View File

@ -4054,43 +4054,41 @@ static int lookups_sorting_compare(const void *left, const void *right)
return *(int *)left - *(int *)right;
};
void opentype_layout_apply_gpos_features(struct scriptshaping_context *context,
unsigned int script_index, unsigned int language_index, const struct shaping_features *features)
static void opentype_layout_collect_lookups(struct scriptshaping_context *context, unsigned int script_index,
unsigned int language_index, const struct shaping_features *features, struct ot_gsubgpos_table *table,
struct lookups *lookups)
{
WORD table_offset, langsys_offset, script_feature_count, total_feature_count, total_lookup_count;
struct scriptshaping_cache *cache = context->cache;
UINT16 table_offset, langsys_offset, script_feature_count, total_feature_count, total_lookup_count;
const struct ot_feature_list *feature_list;
struct lookups lookups = { 0 };
unsigned int i, j, l;
/* ScriptTable offset. */
table_offset = table_read_be_word(&cache->gpos.table, cache->gpos.script_list +
FIELD_OFFSET(struct ot_script_list, scripts) + script_index * sizeof(struct ot_script_record) +
FIELD_OFFSET(struct ot_script_record, script));
table_offset = table_read_be_word(&table->table, table->script_list + FIELD_OFFSET(struct ot_script_list, scripts) +
script_index * sizeof(struct ot_script_record) + FIELD_OFFSET(struct ot_script_record, script));
if (!table_offset)
return;
if (language_index == ~0u)
langsys_offset = table_read_be_word(&cache->gpos.table, cache->gpos.script_list + table_offset);
langsys_offset = table_read_be_word(&table->table, table->script_list + table_offset);
else
langsys_offset = table_read_be_word(&cache->gpos.table, cache->gpos.script_list + table_offset +
langsys_offset = table_read_be_word(&table->table, table->script_list + table_offset +
FIELD_OFFSET(struct ot_script, langsys) + language_index * sizeof(struct ot_langsys_record) +
FIELD_OFFSET(struct ot_langsys_record, langsys));
script_feature_count = table_read_be_word(&cache->gpos.table, cache->gpos.script_list + table_offset +
langsys_offset + FIELD_OFFSET(struct ot_langsys, feature_count));
script_feature_count = table_read_be_word(&table->table, table->script_list + table_offset + langsys_offset +
FIELD_OFFSET(struct ot_langsys, feature_count));
if (!script_feature_count)
return;
total_feature_count = table_read_be_word(&cache->gpos.table, cache->gpos.feature_list);
total_feature_count = table_read_be_word(&table->table, table->feature_list);
if (!total_feature_count)
return;
total_lookup_count = table_read_be_word(&cache->gpos.table, cache->gpos.lookup_list);
total_lookup_count = table_read_be_word(&table->table, table->lookup_list);
if (!total_lookup_count)
return;
feature_list = table_read_ensure(&cache->gpos.table, cache->gpos.feature_list,
feature_list = table_read_ensure(&table->table, table->feature_list,
FIELD_OFFSET(struct ot_feature_list, features[total_feature_count]));
if (!feature_list)
return;
@ -4100,7 +4098,7 @@ void opentype_layout_apply_gpos_features(struct scriptshaping_context *context,
{
for (j = 0; j < script_feature_count; ++j)
{
WORD feature_index = table_read_be_word(&cache->gpos.table, cache->gpos.script_list + table_offset +
UINT16 feature_index = table_read_be_word(&table->table, table->script_list + table_offset +
langsys_offset + FIELD_OFFSET(struct ot_langsys, feature_index[j]));
if (feature_index >= total_feature_count)
continue;
@ -4110,49 +4108,78 @@ void opentype_layout_apply_gpos_features(struct scriptshaping_context *context,
WORD feature_offset = GET_BE_WORD(feature_list->features[feature_index].offset);
WORD lookup_count;
lookup_count = table_read_be_word(&cache->gpos.table, cache->gpos.feature_list + feature_offset +
lookup_count = table_read_be_word(&table->table, table->feature_list + feature_offset +
FIELD_OFFSET(struct ot_feature, lookup_count));
if (!lookup_count)
continue;
if (!dwrite_array_reserve((void **)&lookups.indexes, &lookups.capacity, lookups.count + lookup_count,
sizeof(*lookups.indexes)))
if (!dwrite_array_reserve((void **)&lookups->indexes, &lookups->capacity, lookups->count + lookup_count,
sizeof(*lookups->indexes)))
{
heap_free(lookups.indexes);
return;
}
for (l = 0; l < lookup_count; ++l)
{
WORD lookup_index = table_read_be_word(&cache->gpos.table, cache->gpos.feature_list +
feature_offset + FIELD_OFFSET(struct ot_feature, lookuplist_index[l]));
UINT16 lookup_index = table_read_be_word(&table->table, table->feature_list + feature_offset +
FIELD_OFFSET(struct ot_feature, lookuplist_index[l]));
if (lookup_index >= total_lookup_count)
continue;
lookups.indexes[lookups.count++] = lookup_index;
lookups->indexes[lookups->count++] = lookup_index;
}
}
}
}
/* Sort lookups. */
qsort(lookups.indexes, lookups.count, sizeof(*lookups.indexes), lookups_sorting_compare);
qsort(lookups->indexes, lookups->count, sizeof(*lookups->indexes), lookups_sorting_compare);
}
for (l = 0; l < lookups.count; ++l)
void opentype_layout_apply_gpos_features(struct scriptshaping_context *context, unsigned int script_index,
unsigned int language_index, const struct shaping_features *features)
{
struct lookups lookups = { 0 };
unsigned int i;
opentype_layout_collect_lookups(context, script_index, language_index, features, &context->cache->gpos, &lookups);
for (i = 0; i < lookups.count; ++i)
{
/* Skip duplicates. */
if (l && lookups.indexes[l] == lookups.indexes[l - 1])
if (i && lookups.indexes[i] == lookups.indexes[i - 1])
continue;
opentype_layout_apply_gpos_lookup(context, lookups.indexes[l]);
opentype_layout_apply_gpos_lookup(context, lookups.indexes[i]);
}
heap_free(lookups.indexes);
}
static void opentype_layout_apply_gsub_lookup(struct scriptshaping_context *context, unsigned int first_glyph,
unsigned int glyph_count, int lookup_index)
{
}
HRESULT opentype_layout_apply_gsub_features(struct scriptshaping_context *context, unsigned int script_index,
unsigned int language_index, const struct shaping_features *features)
{
struct lookups lookups = { 0 };
unsigned int i;
opentype_layout_collect_lookups(context, script_index, language_index, features, &context->cache->gsub, &lookups);
for (i = 0; i < lookups.count; ++i)
{
/* Skip duplicates. */
if (i && lookups.indexes[i] == lookups.indexes[i - 1])
continue;
opentype_layout_apply_gsub_lookup(context, 0, context->glyph_count, lookups.indexes[i]);
}
heap_free(lookups.indexes);
return S_OK;
}

6
dlls/dwrite/shape.c
View File

@ -189,7 +189,7 @@ const struct scriptshaping_ops default_shaping_ops =
default_set_text_glyphs_props
};
static DWORD shape_select_script(const struct scriptshaping_cache *cache, DWORD kind, const DWORD *scripts,
static unsigned int shape_select_script(const struct scriptshaping_cache *cache, DWORD kind, const DWORD *scripts,
unsigned int *script_index)
{
static const DWORD fallback_scripts[] =
@ -199,10 +199,10 @@ static DWORD shape_select_script(const struct scriptshaping_cache *cache, DWORD
DWRITE_MAKE_OPENTYPE_TAG('l','a','t','n'),
0,
};
DWORD script;
unsigned int script;
/* Passed scripts in ascending priority. */
while (*scripts)
while (scripts && *scripts)
{
if ((script = opentype_layout_find_script(cache, kind, *scripts, script_index)))
return script;