static int substituteWithVerticalGlyphs(const SimpleFontData* fontData, uint16_t* glyphs, unsigned bufferLength)
{
HB_FaceRec_* hbFace = fontData->platformData().harfbuzzFace()->face();
if (!hbFace->gsub) {
// if there is no GSUB table, treat it as not covered
return 0Xffff;
}
HB_Buffer buffer;
hb_buffer_new(&buffer);
for (unsigned i = 0; i < bufferLength; ++i)
hb_buffer_add_glyph(buffer, glyphs[i], 0, i);
HB_UShort scriptIndex;
HB_UShort featureIndex;
HB_GSUB_Select_Script(hbFace->gsub, HB_MAKE_TAG('D', 'F', 'L', 'T'), &scriptIndex);
HB_GSUB_Select_Feature(hbFace->gsub, HB_MAKE_TAG('v', 'e', 'r', 't'), scriptIndex, 0xffff, &featureIndex);
HB_GSUB_Add_Feature(hbFace->gsub, featureIndex, 1);
HB_GSUB_Select_Feature(hbFace->gsub, HB_MAKE_TAG('v', 'r', 't', '2'), scriptIndex, 0xffff, &featureIndex);
HB_GSUB_Add_Feature(hbFace->gsub, featureIndex, 1);
int error = HB_GSUB_Apply_String(hbFace->gsub, buffer);
if (!error) {
for (unsigned i = 0; i < bufferLength; ++i)
glyphs[i] = static_cast<Glyph>(buffer->out_string[i].gindex);
}
return error;
}
/**
* pango_ot_buffer_add_glyph
* @buffer: a #PangoOTBuffer
* @glyph: the glyph index to add, like a #PangoGlyph
* @properties: the glyph properties
* @cluster: the cluster that this glyph belongs to
*
* Appends a glyph to a #PangoOTBuffer, with @properties identifying which
* features should be applied on this glyph. See pango_ruleset_add_feature().
*
* Since: 1.4
**/
void
pango_ot_buffer_add_glyph (PangoOTBuffer *buffer,
guint glyph,
guint properties,
guint cluster)
{
hb_buffer_add_glyph (buffer->buffer,
glyph, properties, cluster);
}
