1 files changed, 194 insertions, 0 deletions
diff --git a/kpovmodeler/pmtruetypecache.h b/kpovmodeler/pmtruetypecache.h
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+++ b/kpovmodeler/pmtruetypecache.h
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+//-*-C++-*-
+/*
+**************************************************************************
+                                 description
+                             --------------------
+    copyright            : (C) 2002 by Andreas Zehender
+    email                : zehender@kde.org
+**************************************************************************
+
+**************************************************************************
+*                                                                        *
+*  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 <qcache.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 QString& file );
+   
+#ifdef HAVE_FREETYPE
+   
+   /**
+    * Destructor
+    */
+   ~PMTrueTypeCache( );
+   
+private:
+   static PMTrueTypeCache* s_pInstance;
+   static KStaticDeleter<PMTrueTypeCache> s_staticDeleter;
+
+   /**
+    * Lookup function
+    */
+   PMTrueTypeFont* lookUp( const QString& file );
+   
+   QCache<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( QChar 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( QChar c1, QChar 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( QChar c );
+   
+   FT_Library m_library;
+   FT_Face m_face;
+   
+   bool m_valid;
+   bool m_validChecked;
+   bool m_useKerning;
+
+   QCache<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