void* ScFace::ScFaceData::hbFont()
{
if (!m_hbFont)
{
if (!ftFace())
return NULL;
if (formatCode == ScFace::SFNT || formatCode == ScFace::TTCF || formatCode == ScFace::TYPE42)
{
// use HarfBuzz internal font functions for formats it supports,
// gives us more consistent glyph metrics.
FT_Reference_Face(ftFace());
hb_face_t *hbFace = hb_face_create_for_tables(referenceTable, ftFace(), (hb_destroy_func_t) FT_Done_Face);
hb_face_set_index(hbFace, ftFace()->face_index);
hb_face_set_upem(hbFace, ftFace()->units_per_EM);
m_hbFont = hb_font_create(hbFace);
hb_ot_font_set_funcs(reinterpret_cast<hb_font_t*>(m_hbFont));
hb_face_destroy(hbFace);
}
else
{
m_hbFont = hb_ft_font_create_referenced(ftFace());
}
}
return m_hbFont;
}
SFFontRef SFFontCreateWithFTFace(FT_Face ftFace, SFFloat size) {
SFFont *sfFont = malloc(sizeof(SFFont));
sfFont->_ftFace = ftFace;
sfFont->_tables = SFFontTablesCreate();
sfFont->_retainCount = 1;
FT_Reference_Face(ftFace);
setFontSize(sfFont, size);
return sfFont;
}
SFFontRef SFFontMakeCloneForFTFace(SFFontRef sfFont, FT_Face ftFace, SFFloat size) {
SFFont *clone = malloc(sizeof(SFFont));
clone->_ftFace = ftFace;
clone->_tables = SFFontTablesRetain(sfFont->_tables);
clone->_retainCount = 1;
FT_Reference_Face(ftFace);
setFontSize(clone, size);
return clone;
}
TTFFont::TTFFont(Palette* pal, FT_Face face, int lineheight, int baseline)
: Font(pal, lineheight, baseline), face(face)
{
// on FT < 2.4.2 the manager will defer ownership to this object
#if FREETYPE_VERSION_ATLEAST(2,4,2)
FT_Reference_Face(face); // retain the face or the font manager will destroy it
#endif
// ttf fonts dont produce glyphs for whitespace
Sprite2D* blank = core->GetVideoDriver()->CreateSprite8(0, 0, NULL, NULL);
// blank for returning when there is an error
// TODO: ttf fonts have a "box" glyph they use for this
CreateGlyphForCharSprite(0, blank);
blank->Width = core->TLKEncoding.zerospace ? 1 : (LineHeight * 0.25);;
CreateGlyphForCharSprite(' ', blank);
blank->Width *= 4;
CreateGlyphForCharSprite('\t', blank);
blank->release();
}
static hb_font_t *
_raqm_hb_ft_font_create_referenced (FT_Face face)
{
FT_Reference_Face (face);
return hb_ft_font_create (face, (hb_destroy_func_t) FT_Done_Face);
}
