pgfont.h
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	/*
	ParaGUI - crossplatform widgetset
	Copyright (C) 2000,2001,2002 Alexander Pipelka

	This library is free software; you can redistribute it and/or
	modify it under the terms of the GNU Library General Public
	License as published by the Free Software Foundation; either
	version 2 of the License, or (at your option) any later version.

	This library is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	Library General Public License for more details.

	You should have received a copy of the GNU Library General Public
	License along with this library; if not, write to the Free
	Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

	Alexander Pipelka
	pipelka@teleweb.at

	Last Update: $Author: upi $
	Update Date: $Date: 2006/12/04 09:34:33 $
	Source File: $Source: /cvsroot/openmortal/openmortal/src/paragui/pgfont.h,v $
	CVS/RCS Revision: $Revision: 1.1 $
	Status: $State: Exp $
	*/

	/** \file pgfont.h
	Header file of the PG_Font and PG_FontEngine classes.
	*/

	#ifndef PG_FONT_H
	#define PG_FONT_H

	#include "pgdatacontainer.h"
	#include "pgcolor.h"
	#include "pgrect.h"
	#include <string>

	#include <ft2build.h>
	#include FT_FREETYPE_H
	#include FT_ERRORS_H
	#include FT_CACHE_H
	#include FT_CACHE_IMAGE_H
	#include FT_CACHE_SMALL_BITMAPS_H

	#ifdef HASH_MAP_INC
	#include HASH_MAP_INC
	#endif
	#include <map>

	class PG_FontFaceCacheItem;
	class PG_GlyphCacheItem;
	struct PG_FontDataInternal;

	/**
	@short font description class

	This class defines the parameters of a font (size, style, ...)
	*/
	class PG_Font {
	public:

	//! Font styles
	typedef enum {
	NORMAL = 0x00,
	BOLD = 0x01,
	ITALIC = 0x02,
	UNDERLINE = 0x04
	} Style;

	static PG_Font *GetDefaultFont();

	/**
	Construct a PG_Font object
	@param fontfile name of the fontfile to load
	@param size size of the new font
	@param index font index of the loaded file
	*/
	PG_Font(const char* fontfile, int size=14, int index=0);

	/**
	*/
	virtual ~PG_Font();

	/**
	*/
	int GetFontAscender();

	/**
	*/
	int GetFontDescender();

	/**
	Get the absolute height of the font (in pixels)
	@return height of the font
	*/
	int GetFontHeight();

	/**
	Set the color of the font
	@param c PG_Color class of the new color
	*/
	void SetColor(const PG_Color& c);

	/**
	Get the current color of the font
	@return PG_Color class containing the current color
	*/
	PG_Color GetColor();

	/**
	Set the transparency of the font
	@param a font alpha value
	*/
	void SetAlpha(int a);

	/**
	Get the transparency of the font
	@return font alpha value
	*/
	int GetAlpha();

	/**
	Set the size of the font
	@param s new font size
	*/
	void SetSize(int s);

	/**
	Get the size of the font
	@return current size of the font
	*/
	int GetSize();

	/**
	*/
	void SetStyle(Style s);

	/**
	*/
	Style GetStyle();

	/**
	Set the name (filename) of the font
	@param fontfile name of the new fontfile.
	@return true - on success
	This function loads a new font from a file
	*/
	bool SetName(const char* fontfile);

	/**
	Get the current name of the font (filename)
	@return the filename of the font
	*/
	const char* GetName();

	void SetIndex(int index);

	int GetIndex();

	private:

	PG_FontFaceCacheItem* GetFaceCache(int index=0);
	PG_FontDataInternal* my_internaldata;
	static PG_Font *gDefaultFont;

	friend class PG_FontEngine;
	};


	/**
	@author Alexander Pipelka / Ales Teska
	@short C++ Encapsulation of the FreeType engine
	*/

	class PG_FontEngine {
	public:

	/** */
	PG_FontEngine();

	/** */
	~PG_FontEngine();

	/**
	render text onto a surface
	@param Surface destination for rendered text
	@param ClipRect clipping rectangle
	@param BaseLineX x-startposition of the rendered text (inside the surface)
	@param BaseLineY baseline of the rendered text (inside the surface)
	@param Text text to render
	@param ParamIn pointer to font
	@return true on success
	*/
	static bool RenderText(SDL_Surface Surface, const PG_Rect& ClipRect, int BaseLineX, int BaseLineY, const char Text, PG_Font* ParamIn);

	static bool RenderText(SDL_Surface Surface, PG_Rect ClipRect, int BaseLineX, int BaseLineY, const char Text, PG_Font ParamIn);

	/**
	*/
	static bool GetTextSize(const char Text, PG_Font ParamIn, Uint16 Width = NULL, Uint16 Height = NULL, int BaselineY = NULL, int FontLineSkip = NULL, Uint16 FontHeight = NULL, int Ascent = NULL, int *Descent = NULL);

	protected:

	/**
	*/
	static bool BlitFTBitmap(SDL_Surface Surface, FT_Bitmap Bitmap, int PosX, int PosY, PG_Font* Param, PG_Rect *ClipRect);

	/**
	*/
	static void FontEngineError(FT_Error error);

	private:

	/**
	Load a font face from the archive
	@param filename fontfile to load (truetype)
	@param fontsize size of the face in pixels
	@return pointer to the loaded PG_FontFaceCacheItem
	*/
	static PG_FontFaceCacheItem* LoadFontFace(const char* filename, FT_F26Dot6 fontsize, int index = 0);

	/**
	*/
	static PG_GlyphCacheItem* GetGlyph(PG_Font *Param, int glyph_index);

	typedef std::map<FT_F26Dot6, PG_FontFaceCacheItem*> MAP_SUBITEMS;

	class FONT_ITEM {
	public:
	FONT_ITEM() : memdata(NULL) {
	};

	virtual ~FONT_ITEM();

	std::string name;
	PG_DataContainer* memdata;
	MAP_SUBITEMS subitems;
	};

	typedef std::map<std::string, FONT_ITEM*> MAP_FONTS;

	static MAP_FONTS my_fontcache;
	static FT_Library my_library;

	friend class PG_Font;
	};

	#endif

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