//! FIGlet font loader (c) 2009 Gaz Davidson

#ifndef __IRR_C_GUI_FIGLET_FONT_H_INCLUDED__
#define __IRR_C_GUI_FIGLET_FONT_H_INCLUDED__

#include "IGUIFont.h"
#include "IReadFile.h"
#include "irrArray.h"
#include "irrMap.h"

namespace irr
{
namespace gui
{

class CGUIFIGletFont : public IGUIFont
{

public:

	//! Constructor
	CGUIFIGletFont(IGUIFont *baseFont);

	//! Destructor
	virtual ~CGUIFIGletFont();

	//! Loads the font from the given file
	bool load(io::IReadFile* input);

	//! Draws some text and clips it to the specified rectangle if wanted.
	virtual void draw(const wchar_t* text, const core::rect<s32>& position,
		video::SColor color, bool hcenter=false, bool vcenter=false,
		const core::rect<s32>* clip=0);

	//! Calculates the width and height of a given string of text.
	virtual core::dimension2d<u32> getDimension(const wchar_t* text) const;

	//! Calculates the index of the character in the text which is on a specific position.
	virtual s32 getCharacterFromPos(const wchar_t* text, s32 pixel_x) const;

	virtual void setKerningWidth (s32 kerning) { }
	virtual void setKerningHeight (s32 kerning) { }
	virtual s32 getKerningWidth(const wchar_t* thisLetter=0, const wchar_t* previousLetter=0) const;
	virtual s32 getKerningHeight() const { return 0; }
	virtual void setInvisibleCharacters( const wchar_t *s ) { }

private:

	struct SFIGChar
	{
		// The width of this letter
		s32 Width;
		// The X start position of this letter
		s32 Start;
	};

	core::map<wchar_t, s32> CharMap;
	core::array<SFIGChar> Characters;

	// for loading
	void markLine(c8* &startPos);
	s32  getInt  (c8* &startPos);

	// text lookup
	s32 getAreaFromCharacter(wchar_t c) const;
	
	// fill output buffer5
	void generateText(const wchar_t* text) const;

	// kerning/smushing
	s32 getFIGKerning(const wchar_t *thisLetter, const wchar_t *previousLetter) const;


	IGUIFont *RealFont;
	c8 HardBlank;
	u32 Height, MissingChar, MaxLength;
	core::array<c8> FontData;

	// a place for the output characters to be saved, can be accessed from const methods
	core::array<core::stringw*> OutputBuffer;
	mutable core::stringw OutputBufferText;
};

} // namespace gui
} // namespace irr

#endif // __IRR_C_GUI_FIGLET_FONT_H_INCLUDED__