001/* FontRenderContext.java 002 Copyright (C) 2002, 2003 Free Software Foundation, Inc. 003 004This file is part of GNU Classpath. 005 006GNU Classpath is free software; you can redistribute it and/or modify 007it under the terms of the GNU General Public License as published by 008the Free Software Foundation; either version 2, or (at your option) 009any later version. 010 011GNU Classpath is distributed in the hope that it will be useful, but 012WITHOUT ANY WARRANTY; without even the implied warranty of 013MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 014General Public License for more details. 015 016You should have received a copy of the GNU General Public License 017along with GNU Classpath; see the file COPYING. If not, write to the 018Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 01902110-1301 USA. 020 021Linking this library statically or dynamically with other modules is 022making a combined work based on this library. Thus, the terms and 023conditions of the GNU General Public License cover the whole 024combination. 025 026As a special exception, the copyright holders of this library give you 027permission to link this library with independent modules to produce an 028executable, regardless of the license terms of these independent 029modules, and to copy and distribute the resulting executable under 030terms of your choice, provided that you also meet, for each linked 031independent module, the terms and conditions of the license of that 032module. An independent module is a module which is not derived from 033or based on this library. If you modify this library, you may extend 034this exception to your version of the library, but you are not 035obligated to do so. If you do not wish to do so, delete this 036exception statement from your version. */ 037 038 039package java.awt.font; 040 041import java.awt.geom.AffineTransform; 042 043/** 044 * @author Michael Koch 045 */ 046public class FontRenderContext 047{ 048 private AffineTransform affineTransform; 049 private boolean isAntiAliased; 050 private boolean usesFractionalMetrics; 051 052 /** 053 * Construct a new <code>FontRenderContext</code>. 054 */ 055 protected FontRenderContext() 056 { 057 // Do nothing here. 058 } 059 060 /** 061 * Construct a new <code>FontRenderContext</code>. 062 */ 063 public FontRenderContext (AffineTransform tx, boolean isAntiAliased, 064 boolean usesFractionalMetrics) 065 { 066 if (tx != null 067 && !tx.isIdentity ()) 068 { 069 this.affineTransform = new AffineTransform (tx); 070 } 071 072 this.isAntiAliased = isAntiAliased; 073 this.usesFractionalMetrics = usesFractionalMetrics; 074 } 075 076 public boolean equals (Object obj) 077 { 078 if (! (obj instanceof FontRenderContext)) 079 return false; 080 081 return equals ((FontRenderContext) obj); 082 } 083 084 public boolean equals (FontRenderContext rhs) 085 { 086 if (rhs == null) 087 return false; 088 089 if (affineTransform == null && rhs.affineTransform != null 090 || affineTransform != null && rhs.affineTransform == null) 091 return false; 092 093 return ((affineTransform == rhs.affineTransform 094 || affineTransform.equals (rhs.getTransform ())) 095 && isAntiAliased == rhs.isAntiAliased () 096 && usesFractionalMetrics == rhs.usesFractionalMetrics ()); 097 } 098 099 100 /** 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