Source for java.awt.font.FontRenderContext

   1: /* FontRenderContext.java
   2:    Copyright (C) 2002, 2003 Free Software Foundation, Inc.
   3: 
   4: This file is part of GNU Classpath.
   5: 
   6: GNU Classpath is free software; you can redistribute it and/or modify
   7: it under the terms of the GNU General Public License as published by
   8: the Free Software Foundation; either version 2, or (at your option)
   9: any later version.
  10: 
  11: GNU Classpath is distributed in the hope that it will be useful, but
  12: WITHOUT ANY WARRANTY; without even the implied warranty of
  13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14: General Public License for more details.
  15: 
  16: You should have received a copy of the GNU General Public License
  17: along with GNU Classpath; see the file COPYING.  If not, write to the
  18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19: 02110-1301 USA.
  20: 
  21: Linking this library statically or dynamically with other modules is
  22: making a combined work based on this library.  Thus, the terms and
  23: conditions of the GNU General Public License cover the whole
  24: combination.
  25: 
  26: As a special exception, the copyright holders of this library give you
  27: permission to link this library with independent modules to produce an
  28: executable, regardless of the license terms of these independent
  29: modules, and to copy and distribute the resulting executable under
  30: terms of your choice, provided that you also meet, for each linked
  31: independent module, the terms and conditions of the license of that
  32: module.  An independent module is a module which is not derived from
  33: or based on this library.  If you modify this library, you may extend
  34: this exception to your version of the library, but you are not
  35: obligated to do so.  If you do not wish to do so, delete this
  36: exception statement from your version. */
  37: 
  38: 
  39: package java.awt.font;
  40: 
  41: import java.awt.geom.AffineTransform;
  42: 
  43: /**
  44:  * @author Michael Koch
  45:  */
  46: public class FontRenderContext
  47: {
  48:   private AffineTransform affineTransform;
  49:   private boolean isAntiAliased;
  50:   private boolean usesFractionalMetrics;
  51:  
  52:   /**
  53:    * Construct a new <code>FontRenderContext</code>.
  54:    */
  55:   protected FontRenderContext()
  56:   {
  57:     // Do nothing here.
  58:   }
  59:  
  60:   /**
  61:    * Construct a new <code>FontRenderContext</code>.
  62:    */
  63:   public FontRenderContext (AffineTransform tx, boolean isAntiAliased,
  64:                             boolean usesFractionalMetrics)
  65:   {
  66:     if (tx != null
  67:         && !tx.isIdentity ())
  68:       {
  69:         this.affineTransform = new AffineTransform (tx);
  70:       }
  71:     
  72:     this.isAntiAliased = isAntiAliased;
  73:     this.usesFractionalMetrics = usesFractionalMetrics;
  74:   }
  75: 
  76:   public boolean equals (Object obj)
  77:   {
  78:     if (! (obj instanceof FontRenderContext))
  79:       return false;
  80: 
  81:     return equals ((FontRenderContext) obj);
  82:   }
  83: 
  84:   public boolean equals (FontRenderContext rhs)
  85:   {
  86:     if (rhs == null)
  87:       return false;
  88: 
  89:     if (affineTransform == null && rhs.affineTransform != null
  90:         || affineTransform != null && rhs.affineTransform == null)
  91:       return false;
  92: 
  93:     return ((affineTransform == rhs.affineTransform
  94:              || affineTransform.equals (rhs.getTransform ()))
  95:             && isAntiAliased == rhs.isAntiAliased ()
  96:             && usesFractionalMetrics == rhs.usesFractionalMetrics ());
  97:   }
  98: 
  99: 
 100:   /**
 101:    * Retrieves the affine transform for scaling typographical points
 102:    * to raster pixels.
 103:    *
 104:    * @return a clone of the transform object.
 105:    */
 106:   public AffineTransform getTransform ()
 107:   {
 108:     if (affineTransform == null)
 109:       return new AffineTransform ();
 110:     else
 111:       return new AffineTransform (affineTransform);
 112:   }
 113: 
 114: 
 115:   /**
 116:    * Returns the hash code of the font render context.
 117:    */
 118:   public int hashCode ()
 119:   {
 120:     int code = ( isAntiAliased ? 1 : 0 ) + ( usesFractionalMetrics ? 2 : 0 );
 121: 
 122:     if( affineTransform != null && !affineTransform.isIdentity() )
 123:       code ^= affineTransform.hashCode();
 124: 
 125:     return code;
 126:   }
 127: 
 128:   public boolean isAntiAliased ()
 129:   {
 130:     return isAntiAliased;
 131:   }
 132: 
 133:   public boolean usesFractionalMetrics ()
 134:   {
 135:     return usesFractionalMetrics;
 136:   }
 137: }
 138: