cache font styles

src/ruis/res/font.hpp

@@ -99,7 +99,7 @@ class font : public ruis::resource
 		if (ret) {
 			return ret->get(size);
 		}
-		return this->fonts[unsigned(style::normal)]->get(size);
+		return this->fonts[size_t(style::normal)]->get(size);
 	}
 
 private:

src/ruis/widgets/base/text_widget.cpp

@@ -47,7 +47,9 @@ void text_widget::set_font_size(real size)
 
 	this->font_size = size;
 
-	this->font = this->font_face.get().get(this->font_size);
+	for (size_t i = 0; i != size_t(res::font::style::enum_size); ++i) {
+		this->fonts[i] = this->font_face.get().get(this->font_size, res::font::style(i));
+	}
 
 	this->invalidate_layout();
 
@@ -83,7 +85,12 @@ text_widget::text_widget(const utki::shared_ref<ruis::context>& c, const treeml:
 		// load default font
 		return this->context.get().loader.load<res::font>("ruis_fnt_text");
 	}()),
-	font(this->font_face.get().get(this->font_size))
+	fonts{
+		this->font_face.get().get(this->font_size, res::font::style(0)),
+		this->font_face.get().get(this->font_size, res::font::style(1)),
+		this->font_face.get().get(this->font_size, res::font::style(2)),
+		this->font_face.get().get(this->font_size, res::font::style(3))
+	}
 {
 	for (const auto& p : desc) {
 		if (!is_property(p)) {

src/ruis/widgets/base/text_widget.hpp

@@ -42,7 +42,7 @@ class text_widget : virtual public widget
 
 	utki::shared_ref<const res::font> font_face;
 
-	utki::shared_ref<const ruis::font> font;
+	std::array<utki::shared_ref<const ruis::font>, size_t(res::font::style::enum_size)> fonts;
 
 public:
 	text_widget(const text_widget&) = delete;
@@ -55,9 +55,9 @@ class text_widget : virtual public widget
 
 	void set_font_face(const utki::shared_ref<const res::font>& font_res);
 
-	const ruis::font& get_font() const
+	const ruis::font& get_font(res::font::style style = res::font::style::normal) const
 	{
-		return this->font.get();
+		return this->fonts[size_t(style)].get();
 	}
 
 	void set_font_size(real size);