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194 lines
4.3 KiB
194 lines
4.3 KiB
/*
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**************************************************************************
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description
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--------------------
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copyright : (C) 2002 by Andreas Zehender
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email : zehender@kde.org
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**************************************************************************
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**************************************************************************
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* *
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* This program is free software; you can redistribute it and/or modify *
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* it under the terms of the GNU General Public License as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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**************************************************************************/
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#ifndef PMTRUETYPECACHE_H
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#define PMTRUETYPECACHE_H
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include "pmsplinesegment.h"
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#include <tqcache.h>
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#include <kstaticdeleter.h>
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#ifdef HAVE_FREETYPE
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#include <ft2build.h>
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#include FT_FREETYPE_H
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#include FT_GLYPH_H
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#include FT_OUTLINE_H
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#endif
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class PMTrueTypeFont;
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/**
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* Cache for truetype fonts
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*/
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class PMTrueTypeCache
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{
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public:
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/**
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* Returns a pointer to the font with file name "file" or 0, if the
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* font does not exist or is no truetype font
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*
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* Returns 0 if freetype is not available.
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*/
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static PMTrueTypeFont* font( const TQString& file );
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#ifdef HAVE_FREETYPE
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/**
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* Destructor
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*/
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~PMTrueTypeCache( );
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private:
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static PMTrueTypeCache* s_pInstance;
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static KStaticDeleter<PMTrueTypeCache> s_staticDeleter;
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/**
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* Lookup function
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*/
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PMTrueTypeFont* lookUp( const TQString& file );
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TQCache<PMTrueTypeFont> m_cache;
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FT_Library m_library;
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#endif //HAVE_FREETYPE
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private:
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/**
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* Standard constructor
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*/
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PMTrueTypeCache( );
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};
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/**
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* Class that represents a truetype character outline
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*/
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class PMTrueTypeOutline
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{
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public:
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#ifdef HAVE_FREETYPE
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/**
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* Constructor that generates the outline for the glyph.
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* The outline is scaled to match the font height.
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*/
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PMTrueTypeOutline( FT_OutlineGlyph glyph, FT_Face face );
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#else
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/**
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* Standard constructor.
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*
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* Don't use this constructor. It is only added as dummy if freetype
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* is not installed.
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*/
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PMTrueTypeOutline( )
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{
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m_contours = 0;
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m_segments = 0;
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m_advance = 0;
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}
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#endif
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/**
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* Returns the outline
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*/
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const PMSegmentListList& outline( ) const { return m_outline; }
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/**
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* Returns the number of contours
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*/
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int contours( ) const { return m_contours; }
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/**
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* Returns the sum of the number of segments for all contours
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*/
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int segments( ) const { return m_segments; }
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/**
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* Returns the offset for the next character
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*/
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double advance( ) const { return m_advance; }
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PMSegmentListList m_outline;
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int m_contours;
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int m_segments;
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double m_advance;
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};
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/**
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* Class that represents a truetype font.
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*
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* This class caches the glyph outlines.
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*/
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class PMTrueTypeFont
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{
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public:
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/**
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* Returns the outline for the character
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*
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* Returns 0 if there is no glyph for the character or the font is
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* not a valid, scalable true type font.
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*/
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PMTrueTypeOutline* outline( TQChar c );
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/**
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* Returns true if the font is a valid, scalable true type font
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*/
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bool isValid( );
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/**
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* Returns the kerning offset for the two characters
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*/
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double kerning( TQChar c1, TQChar c2 );
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#ifdef HAVE_FREETYPE
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public:
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/**
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* Creates a true type font
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*/
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PMTrueTypeFont( FT_Library lib, FT_Face face );
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/**
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* Deletes the true type font
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*/
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~PMTrueTypeFont( );
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private:
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FT_UInt findGlyphIndex( TQChar c );
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FT_Library m_library;
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FT_Face m_face;
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bool m_valid;
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bool m_validChecked;
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bool m_useKerning;
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TQCache<PMTrueTypeOutline> m_cache;
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#else //!HAVE_FREETYPE
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public:
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/**
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* Standard constructor.
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*
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* Don't use this constructor. It is only added as dummy if freetype
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* is not installed.
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*/
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PMTrueTypeFont( );
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#endif //HAVE_FREETYPE
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};
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#endif
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