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