1 /*
   2  * Copyright (c) 1998, 2000, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package sun.print;
  27 
  28 import java.awt.AlphaComposite;
  29 import java.awt.Color;
  30 import java.awt.Composite;
  31 import java.awt.Graphics2D;
  32 import java.awt.Image;
  33 import java.awt.Paint;
  34 
  35 import java.awt.font.TextLayout;
  36 
  37 import java.awt.image.RenderedImage;
  38 import java.awt.image.renderable.RenderableImage;
  39 
  40 /**
  41  * Maintain information about the type of drawing
  42  * performed by a printing application.
  43  */
  44 public class PeekMetrics {
  45 
  46     private boolean mHasNonSolidColors;
  47 
  48     private boolean mHasCompositing;
  49 
  50     private boolean mHasText;
  51 
  52     private boolean mHasImages;
  53 
  54     /**
  55      * Return <code>true</code> if the application
  56      * has done any drawing with a Paint that
  57      * is not an instance of <code>Color</code>
  58      */
  59     public boolean hasNonSolidColors() {
  60         return mHasNonSolidColors;
  61     }
  62 
  63     /**
  64      * Return true if the application has
  65      * done any drawing with an alpha other
  66      * than 1.0.
  67      */
  68     public boolean hasCompositing() {
  69         return mHasCompositing;
  70     }
  71 
  72     /**
  73      * Return true if the application has
  74      * drawn any text.
  75      */
  76     public boolean hasText() {
  77         return mHasText;
  78     }
  79 
  80     /**
  81      * Return true if the application has
  82      * drawn any images.
  83      */
  84     public boolean hasImages() {
  85         return mHasImages;
  86     }
  87 
  88     /**
  89      * The application is performing a fill
  90      * so record the needed information.
  91      */
  92     public void fill(Graphics2D g) {
  93         checkDrawingMode(g);
  94     }
  95 
  96     /**
  97      * The application is performing a draw
  98      * so record the needed information.
  99      */
 100     public void draw(Graphics2D g) {
 101         checkDrawingMode(g);
 102     }
 103 
 104     /**
 105      * The application is performing a clearRect
 106      * so record the needed information.
 107      */
 108     public void clear(Graphics2D g) {
 109         checkPaint(g.getBackground());
 110     }
 111     /**
 112      * The application is drawing text
 113      * so record the needed information.
 114      */
 115     public void drawText(Graphics2D g) {
 116         mHasText = true;
 117         checkDrawingMode(g);
 118     }
 119 
 120     /**
 121      * The application is drawing text
 122      * defined by <code>TextLayout</code>
 123      * so record the needed information.
 124      */
 125     public void drawText(Graphics2D g, TextLayout textLayout) {
 126         mHasText = true;
 127         checkDrawingMode(g);
 128     }
 129 
 130     /**
 131      * The application is drawing the passed
 132      * in image.
 133      */
 134     public void drawImage(Graphics2D g, Image image) {
 135         mHasImages = true;
 136     }
 137 
 138     /**
 139      * The application is drawing the passed
 140      * in image.
 141      */
 142     public void drawImage(Graphics2D g, RenderedImage image) {
 143         mHasImages = true;
 144     }
 145 
 146     /**
 147      * The application is drawing the passed
 148      * in image.
 149      */
 150     public void drawImage(Graphics2D g, RenderableImage image) {
 151         mHasImages = true;
 152     }
 153 
 154     /**
 155      * Record information about the current paint
 156      * and composite.
 157      */
 158     private void checkDrawingMode(Graphics2D g) {
 159 
 160         checkPaint(g.getPaint());
 161         checkAlpha(g.getComposite());
 162 
 163     }
 164 
 165     /**
 166      * Record information about drawing done
 167      * with the supplied <code>Paint</code>.
 168      */
 169     private void checkPaint(Paint paint) {
 170 
 171         if (paint instanceof Color) {
 172             if (((Color)paint).getAlpha() < 255) {
 173                 mHasNonSolidColors = true;
 174             }
 175         } else {
 176             mHasNonSolidColors = true;
 177         }
 178     }
 179 
 180     /**
 181      * Record information about drawing done
 182      * with the supplied <code>Composite</code>.
 183      */
 184     private void checkAlpha(Composite composite) {
 185 
 186         if (composite instanceof AlphaComposite) {
 187             AlphaComposite alphaComposite = (AlphaComposite) composite;
 188             float alpha = alphaComposite.getAlpha();
 189             int rule = alphaComposite.getRule();
 190 
 191             if (alpha != 1.0
 192                     || (rule != AlphaComposite.SRC
 193                         && rule != AlphaComposite.SRC_OVER)) {
 194 
 195                 mHasCompositing = true;
 196             }
 197 
 198         } else {
 199             mHasCompositing = true;
 200         }
 201 
 202     }
 203 
 204 }