/* Font - stores a font, used by BitmapText. */

#ifndef FONT_H
#define FONT_H

#include "RageTextureID.h"
#include "RageUtil.h"
#include "RageTypes.h"
#include <map>

class FontPage;
class RageTexture;
class IniFile;

struct FontPageTextures
{
	RageTexture *m_pTextureMain;
	/* an optional texture drawn underneath Main that can help to acheive
	 * complicated layer styles. */
	RageTexture *m_pTextureStroke;

	FontPageTextures()
	{
		m_pTextureMain = NULL;
		m_pTextureStroke = NULL;
	}
};

struct glyph
{
	FontPage *m_pPage;
	FontPageTextures m_FontPageTextures;
	FontPageTextures *GetFontPageTextures() const { return const_cast<FontPageTextures *>(&m_FontPageTextures); }

	// Number of pixels to advance horizontally after drawing this character.
	int m_iHadvance;

	// Size of the actual rendered character.
	float m_fWidth, m_fHeight;

	// Number of pixels to offset this character when rendering.
	float m_fHshift; // , m_fVshift;

	// Texture coordinate rect.
	RectF m_TexRect;
};

struct FontPageSettings
{
	RString m_sTexturePath;

	int m_iDrawExtraPixelsLeft,
		m_iDrawExtraPixelsRight,
		m_iAddToAllWidths,
		m_iLineSpacing,
		m_iTop,
		m_iBaseline,
		m_iDefaultWidth,
		m_iAdvanceExtraPixels;
	float m_fScaleAllWidthsBy;
	RString m_sTextureHints;

	map<wchar_t,int> CharToGlyphNo;
	// If a value is missing, the width of the texture frame is used.
	map<int,int> m_mapGlyphWidths;

	FontPageSettings():
		m_iDrawExtraPixelsLeft(0), m_iDrawExtraPixelsRight(0),
		m_iAddToAllWidths(0), 
		m_iLineSpacing(-1),
		m_iTop(-1),
		m_iBaseline(-1),
		m_iDefaultWidth(-1),
		m_iAdvanceExtraPixels(1),
		m_fScaleAllWidthsBy(1),
		m_sTextureHints("default")
	{ }

	/* Map a range from a character map to glyphs. If cnt is -1, map the
	 * whole map. Returns "" or an error message. */
	RString MapRange( RString sMapping, int iMapOffset, int iGlyphOffset, int iCount );
};

class FontPage
{
public:
	FontPage();
	~FontPage();

	void Load( const FontPageSettings &cfg );

	// Page-global properties.
	int m_iHeight;
	int m_iLineSpacing;
	float m_fVshift;
	int GetCenter() const { return m_iHeight/2; }

	// Remember these only for GetLineWidthInSourcePixels.
	int m_iDrawExtraPixelsLeft, m_iDrawExtraPixelsRight;

	FontPageTextures m_FontPageTextures;

	// XXX: remove?
	RString m_sTexturePath;

	// All glyphs in this list will point to m_pTexture.
	vector<glyph> m_aGlyphs;

	map<wchar_t,int> m_iCharToGlyphNo;

private:
	void SetExtraPixels( int iDrawExtraPixelsLeft, int DrawExtraPixelsRight );
	void SetTextureCoords( const vector<int> &aiWidths, int iAdvanceExtraPixels );
};

class Font
{
public:
	int m_iRefCount;
	RString path;

	Font();
	~Font();

	const glyph &GetGlyph( wchar_t c ) const;

	int GetLineWidthInSourcePixels( const wstring &szLine ) const;
	int GetLineHeightInSourcePixels( const wstring &szLine ) const;

	bool FontCompleteForString( const wstring &str ) const;

	// Add a FontPage to this font.
	void AddPage(FontPage *fp);

	// Steal all of a font's pages.
	void MergeFont(Font &f);

	void Load(const RString &sFontOrTextureFilePath, RString sChars);
	void Unload();
	void Reload();

	// Load font-wide settings.
	void CapsOnly();

	int GetHeight() const { return m_pDefault->m_iHeight; }
	int GetCenter() const { return m_pDefault->GetCenter(); }
	int GetLineSpacing() const { return m_pDefault->m_iLineSpacing; }

	void SetDefaultGlyph( FontPage *pPage );

	bool IsRightToLeft() const { return m_bRightToLeft; };
	const RageColor &GetDefaultStrokeColor() const { return m_DefaultStrokeColor; };

private:
	// List of pages and fonts that we use (and are responsible for freeing).
	vector<FontPage *> m_apPages;

	/* This is the primary fontpage of this font; font-wide height, center,
	 * etc. is pulled from it. (This is one of pages[].) */
	FontPage *m_pDefault;

	// Map from characters to glyphs. (Each glyph* is part of one of pages[].)
	map<wchar_t,glyph*> m_iCharToGlyph;
	glyph *m_iCharToGlyphCache[128];

	// True for Hebrew, Arabic, Urdu fonts.
	// This will also change the way glyphs from the default FontPage are rendered. 
	// There may be a better way to handle this.
	bool m_bRightToLeft;

	RageColor m_DefaultStrokeColor;

	// We keep this around only for reloading.
	RString m_sChars;

	void LoadFontPageSettings( FontPageSettings &cfg, IniFile &ini, const RString &sTexturePath, const RString &PageName, RString sChars );
	static void GetFontPaths( const RString &sFontOrTextureFilePath, vector<RString> &sTexturePaths );
	RString GetPageNameFromFileName( const RString &sFilename );
};

/* Last private-use Unicode character: */
/* This is in the header to reduce file dependencies. */
const wchar_t FONT_DEFAULT_GLYPH = 0xF8FF;

#endif

/*
 * (c) 2001-2004 Glenn Maynard, Chris Danford
 * All rights reserved.
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, and/or sell copies of the Software, and to permit persons to
 * whom the Software is furnished to do so, provided that the above
 * copyright notice(s) and this permission notice appear in all copies of
 * the Software and that both the above copyright notice(s) and this
 * permission notice appear in supporting documentation.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF
 * THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS
 * INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT
 * OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
 * OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
 * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 */