// Copyright (C) 2002-2008 Nikolaus Gebhardt
// This file is part of the "Irrlicht Engine".
// For conditions of distribution and use, see copyright notice in irrlicht.h

#ifndef __I_GUI_FONT_BITMAP_H_INCLUDED__
#define __I_GUI_FONT_BITMAP_H_INCLUDED__

#include "IGUIFont.h"

namespace irr
{
namespace gui
{
	class IGUISpriteBank;

//! Font interface.
class IGUIFontBitmap : public IGUIFont
{
public:

	//! Destructor
	virtual ~IGUIFontBitmap() {}

	//! Returns the type of this font
	virtual EGUI_FONT_TYPE getType() const { return EGFT_BITMAP; }

	//! returns the parsed Symbol Information
	virtual IGUISpriteBank* getSpriteBank() const = 0;

	//! returns the sprite number from a given character
	virtual u32 getSpriteNoFromChar(const wchar_t *c) const = 0;

	//! Gets kerning values (distance between letters) for the font. If no parameters are provided,
	/** the global kerning distance is returned.
	\param thisLetter: If this parameter is provided, the left side kerning for this letter is added
	to the global kerning value. For example, a space might only be one pixel wide, but it may
	be displayed as several pixels.
	\param previousLetter: If provided, kerning is calculated for both letters and added to the global
	kerning value. For example, EGFT_BITMAP will add the right kerning value of previousLetter to the
	left side kerning value of thisLetter, then add the global value.
	*/
	virtual s32 getKerningWidth(const wchar_t* thisLetter=0, const wchar_t* previousLetter=0) const = 0;
};

} // end namespace gui
} // end namespace irr

#endif

