static hb_script_t findScriptForVerticalGlyphSubstitution(hb_face_t* face) {
static const unsigned maxCount = 32;
unsigned scriptCount = maxCount;
hb_tag_t scriptTags[maxCount];
hb_ot_layout_table_get_script_tags(face, HB_OT_TAG_GSUB, 0, &scriptCount,
scriptTags);
for (unsigned scriptIndex = 0; scriptIndex < scriptCount; ++scriptIndex) {
unsigned languageCount = maxCount;
hb_tag_t languageTags[maxCount];
hb_ot_layout_script_get_language_tags(face, HB_OT_TAG_GSUB, scriptIndex, 0,
&languageCount, languageTags);
for (unsigned languageIndex = 0; languageIndex < languageCount;
++languageIndex) {
unsigned featureIndex;
if (hb_ot_layout_language_find_feature(
face, HB_OT_TAG_GSUB, scriptIndex, languageIndex,
HarfBuzzFace::vertTag, &featureIndex) ||
hb_ot_layout_language_find_feature(
face, HB_OT_TAG_GSUB, scriptIndex, languageIndex,
HarfBuzzFace::vrt2Tag, &featureIndex))
return hb_ot_tag_to_script(scriptTags[scriptIndex]);
}
}
return HB_SCRIPT_INVALID;
}
hb_tag_t
getIndLanguage(XeTeXFont font, hb_tag_t script, unsigned int index)
{
hb_tag_t rval = 0;
hb_face_t* face = hb_font_get_face(((XeTeXFontInst*)font)->getHbFont());
hb_tag_t* scriptList;
unsigned int scriptCount = getLargerScriptListTable(font, &scriptList);
if (scriptList != NULL) {
for (int i = 0; i < scriptCount; i++) {
if (scriptList[i] == script) {
unsigned int langCount;
hb_tag_t* langList;
langCount = hb_ot_layout_script_get_language_tags(face, HB_OT_TAG_GSUB, i, 0, NULL, NULL);
langList = (hb_tag_t*) xcalloc(langCount, sizeof(hb_tag_t*));
hb_ot_layout_script_get_language_tags(face, HB_OT_TAG_GSUB, i, 0, &langCount, langList);
if (index < langCount) {
rval = langList[index];
break;
}
free(langList);
langCount = hb_ot_layout_script_get_language_tags(face, HB_OT_TAG_GPOS, i, 0, NULL, NULL);
langList = (hb_tag_t*) xcalloc(langCount, sizeof(hb_tag_t*));
hb_ot_layout_script_get_language_tags(face, HB_OT_TAG_GPOS, i, 0, &langCount, langList);
if (index < langCount) {
rval = langList[index];
break;
}
free(langList);
}
}
}
return rval;
}
unsigned int
countLanguages(XeTeXFont font, hb_tag_t script)
{
unsigned int rval = 0;
hb_face_t* face = hb_font_get_face(((XeTeXFontInst*)font)->getHbFont());
hb_tag_t* scriptList;
unsigned int scriptCount = getLargerScriptListTable(font, &scriptList);
if (scriptList != NULL) {
for (int i = 0; i < scriptCount; i++) {
if (scriptList[i] == script) {
rval += hb_ot_layout_script_get_language_tags (face, HB_OT_TAG_GSUB, i, 0, NULL, NULL);
rval += hb_ot_layout_script_get_language_tags (face, HB_OT_TAG_GPOS, i, 0, NULL, NULL);
break;
}
}
}
return rval;
}
static void
_hb_ot_layout_collect_lookups_languages (hb_face_t *face,
hb_tag_t table_tag,
unsigned int script_index,
const hb_tag_t *languages,
const hb_tag_t *features,
hb_set_t *lookup_indexes /* OUT */)
{
_hb_ot_layout_collect_lookups_features (face,
table_tag,
script_index,
HB_OT_LAYOUT_DEFAULT_LANGUAGE_INDEX,
features,
lookup_indexes);
if (!languages)
{
/* All languages */
unsigned int count = hb_ot_layout_script_get_language_tags (face,
table_tag,
script_index,
0, NULL, NULL);
for (unsigned int language_index = 0; language_index < count; language_index++)
_hb_ot_layout_collect_lookups_features (face,
table_tag,
script_index,
language_index,
features,
lookup_indexes);
}
else
{
for (; *languages; languages++)
{
unsigned int language_index;
if (hb_ot_layout_script_find_language (face,
table_tag,
script_index,
*languages,
&language_index))
_hb_ot_layout_collect_lookups_features (face,
table_tag,
script_index,
language_index,
features,
lookup_indexes);
}
}
}
static hb_script_t findScriptForVerticalGlyphSubstitution(hb_face_t* face)
{
static const unsigned maxCount = 32;
unsigned scriptCount = maxCount;
hb_tag_t scriptTags[maxCount];
hb_ot_layout_table_get_script_tags(face, HB_OT_TAG_GSUB, 0, &scriptCount, scriptTags);
for (unsigned scriptIndex = 0; scriptIndex < scriptCount; ++scriptIndex) {
unsigned languageCount = maxCount;
hb_tag_t languageTags[maxCount];
hb_ot_layout_script_get_language_tags(face, HB_OT_TAG_GSUB, scriptIndex, 0, &languageCount, languageTags);
unsigned featureIndex;
for (unsigned languageIndex = 0; languageIndex < languageCount; ++languageIndex) {
if (hb_ot_layout_language_find_feature(face, HB_OT_TAG_GSUB, scriptIndex, languageIndex, HarfBuzzFace::vertTag, &featureIndex))
return hb_ot_tag_to_script(scriptTags[scriptIndex]);
}
// Try DefaultLangSys if all LangSys failed.
if (hb_ot_layout_language_find_feature(face, HB_OT_TAG_GSUB, scriptIndex, HB_OT_LAYOUT_DEFAULT_LANGUAGE_INDEX, HarfBuzzFace::vertTag, &featureIndex))
return hb_ot_tag_to_script(scriptTags[scriptIndex]);
}
return HB_SCRIPT_INVALID;
}
