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include/framework/font/font_interface.h

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+/* -----------------------------------------------------------------------------
+	GSFramework
+	Copyright 2001-2013 Emmanuel Julien. All Rights Reserved.
+----------------------------------------------------------------------------- */
+
+
+#ifndef	__FONTINTERFACE__
+#define	__FONTINTERFACE__
+
+
+		#include "color/color.h"
+		#include "geometry/rect.h"
+		#include "memory/nshared_ptr.h"
+		#include "nstring/nstring.h"
+
+
+namespace GS {
+	class Picture;
+
+/*!
+	@short	Font interface.
+	@author	Emmanuel Julien (ejulien@owloh.com)
+*/
+struct	IFont : public SharedObject
+{
+		/// Return the font name.
+virtual	const char	*GetName() const = 0;
+
+		/// Return the bounding rect for a given string.
+virtual	iRect		GetTextBoundRect(const char *) const = 0;
+
+		/// Set font size in pixels.
+virtual	bool		SetPixelSize(int) = 0;
+		/// Get font height in pixels.
+virtual	int			GetHeight() const = 0;
+		/// Get font current glyph advance.
+virtual	int			GetAdvance() const = 0;
+
+		/// Return true if the font supports kerning.
+virtual	bool		HasKerning() const = 0;
+		/// Return the kerning for a glyph codepoint.
+virtual	int			GetKerning(uint previous_codepoint, uint codepoint) const = 0;
+
+		/// Load the glyph corresponding to a UTF-32 codepoint.
+virtual	bool		LoadGlyph(uint codepoint, bool for_render) = 0;
+		/// Render currently loaded glyph to a picture.
+virtual	bool		RenderCurrentGlyph(Picture &picture, const iPoint &position, const iRect &clip, const Color &color = Color::White) = 0;
+
+		/// Set a fallback font to query in case a glyph cannot be found in this font.
+virtual	void		SetFallback(IFont *) {}
+
+virtual	~IFont() {}
+};
+
+typedef SharedPtr <IFont> sIFont;
+
+} // GS
+
+
+#endif	// __FONTINTERFACE__