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_new
* @font: a #PangoFcFont
*
* Creates a new #PangoOTBuffer for the given OpenType font.
*
* Return value: the newly allocated #PangoOTBuffer, which should
* be freed with pango_ot_buffer_destroy().
*
* Since: 1.4
**/
PangoOTBuffer *
pango_ot_buffer_new (PangoFcFont *font)
{
/* We lock the font here immediately for the silly reason
* of getting the FT_Memory; otherwise we'd have to
* add a new operation to PangoFcFontmap; callers will
* probably already have the font locked, however,
* so there is little performance penalty.
*/
PangoOTBuffer *buffer = g_slice_new (PangoOTBuffer);
FT_Face face = pango_fc_font_lock_face (font);
if (hb_buffer_new (face->memory, &buffer->buffer) != FT_Err_Ok)
g_warning ("Allocation of HB_Buffer failed"); /* this doesn't happen */
buffer->font = g_object_ref (font);
buffer->applied_gpos = FALSE;
buffer->rtl = FALSE;
buffer->zero_width_marks = FALSE;
pango_fc_font_unlock_face (font);
return buffer;
}
