static void setupFontFeatures(const FontFeatureSettings* settings, HB_FaceRec_* hbFace)
{
if (!settings)
return;
if (hbFace->gsub)
HB_GSUB_Clear_Features(hbFace->gsub);
if (hbFace->gpos)
HB_GPOS_Clear_Features(hbFace->gpos);
HB_UShort scriptIndex = 0;
HB_GSUB_Select_Script(hbFace->gsub, HB_MAKE_TAG('D', 'F', 'L', 'T'), &scriptIndex);
size_t numFeatures = settings->size();
for (size_t i = 0; i < numFeatures; ++i) {
if (!settings->at(i).value())
continue;
HB_UShort featureIndex = 0;
const UChar* tag = settings->at(i).tag().characters();
HB_UInt feature = HB_MAKE_TAG(tag[0], tag[1], tag[2], tag[3]);
if (hbFace->gsub && HB_GSUB_Select_Feature(hbFace->gsub, feature, scriptIndex, 0xffff, &featureIndex) == HB_Err_Ok)
HB_GSUB_Add_Feature(hbFace->gsub, featureIndex, settings->at(i).value());
else if (hbFace->gpos && HB_GPOS_Select_Feature(hbFace->gpos, feature, scriptIndex, 0xffff, &featureIndex) == HB_Err_Ok)
HB_GPOS_Add_Feature(hbFace->gpos, featureIndex, settings->at(i).value());
}
}
/**
* pango_ot_ruleset_position:
* @ruleset: a #PangoOTRuleset.
* @buffer: a #PangoOTBuffer.
*
* Performs the OpenType GPOS positioning on @buffer using the features
* in @ruleset
*
* Since: 1.4
**/
void
pango_ot_ruleset_position (const PangoOTRuleset *ruleset,
PangoOTBuffer *buffer)
{
unsigned int i;
HB_GPOS gpos = NULL;
g_return_if_fail (PANGO_IS_OT_RULESET (ruleset));
g_return_if_fail (ruleset->info != NULL);
for (i = 0; i < ruleset->rules->len; i++)
{
PangoOTRule *rule = &g_array_index (ruleset->rules, PangoOTRule, i);
if (rule->table_type != PANGO_OT_TABLE_GPOS)
continue;
if (!gpos)
{
gpos = pango_ot_info_get_gpos (ruleset->info);
if (gpos)
HB_GPOS_Clear_Features (gpos);
else
return;
}
HB_GPOS_Add_Feature (gpos, rule->feature_index, rule->property_bit);
}
if (HB_GPOS_Apply_String (ruleset->info->face, gpos, 0, buffer->buffer,
FALSE /* enable device-dependant values */,
buffer->rtl) == HB_Err_Ok)
buffer->applied_gpos = TRUE;
}
