FontSupport::FontMatch FontSupport::matchFont(const WFont& f) const
{
for (MatchCache::iterator i = cache_.begin(); i != cache_.end(); ++i) {
if (i->font == f) {
cache_.splice(cache_.begin(), cache_, i); // implement LRU
return FontMatch(i->match, i->desc);
}
}
PANGO_LOCK;
enabledFontFormats = enabledFontFormats_;
PangoFontDescription *desc = createFontDescription(f);
PangoFont *match = pango_font_map_load_font(pangoFontMap, context_, desc);
pango_context_set_font_description(context_, desc); // for layoutText()
if (cache_.back().match) {
g_object_unref(cache_.back().match);
pango_font_description_free(cache_.back().desc);
}
cache_.pop_back();
cache_.push_front(Matched(f, match, desc));
return FontMatch(match, desc);
}
GList *FontSupport::layoutText(const WFont& font,
const std::string& utf8,
std::vector<PangoGlyphString *>& glyphs,
int& width)
{
PANGO_LOCK;
PangoFontDescription *desc = createFontDescription(font);
pango_context_set_font_description(context_, desc);
pango_font_description_free(desc);
PangoAttrList *attrs = pango_attr_list_new();
GList *items
= pango_itemize(context_, utf8.c_str(), 0, utf8.length(), attrs, NULL);
width = 0;
for (GList *elem = items; elem; elem = elem->next) {
PangoItem *item = (PangoItem *)elem->data;
PangoAnalysis *analysis = &item->analysis;
PangoGlyphString *gl = pango_glyph_string_new();
pango_shape(utf8.c_str() + item->offset, item->length, analysis, gl);
glyphs.push_back(gl);
if (device_) {
currentFont_ = analysis->font;
WTextItem textItem
= device_->measureText(WString::fromUTF8(utf8.substr(item->offset,
item->length)),
-1, false);
width += pangoUnitsFromDouble(textItem.width());
currentFont_ = 0;
} else
width += pango_glyph_string_get_width(gl);
}
pango_attr_list_unref(attrs);
return items;
}
FontSupport::FontMatch FontSupport::matchFont(const WFont& f) const
{
if (wtFont_ == f)
return FontMatch(matchFont_);
wtFont_ = f;
PANGO_LOCK;
PangoFontDescription *desc = createFontDescription(f);
if (matchFont_)
g_object_unref(matchFont_);
matchFont_ = pango_font_map_load_font(pangoFontMap, context_, desc);
pango_font_description_free(desc);
return FontMatch(matchFont_);
}
