1 /*
   2  * Copyright (c) 1997, 2007, 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 
  27 
  28 package java.awt;
  29 
  30 import java.awt.image.ColorModel;
  31 import java.awt.image.Raster;
  32 import java.awt.image.WritableRaster;
  33 import sun.awt.image.IntegerComponentRaster;
  34 import java.util.Arrays;
  35 
  36 class ColorPaintContext implements PaintContext {
  37     int color;
  38     WritableRaster savedTile;
  39 
  40     protected ColorPaintContext(int color, ColorModel cm) {
  41         this.color = color;
  42     }
  43 
  44     public void dispose() {
  45     }
  46 
  47     /*
  48      * Returns the RGB value representing the color in the default sRGB
  49      * {@link ColorModel}.
  50      * (Bits 24-31 are alpha, 16-23 are red, 8-15 are green, 0-7 are
  51      * blue).
  52      * @return the RGB value of the color in the default sRGB
  53      *         <code>ColorModel</code>.
  54      * @see java.awt.image.ColorModel#getRGBdefault
  55      * @see #getRed
  56      * @see #getGreen
  57      * @see #getBlue
  58      */
  59     int getRGB() {
  60         return color;
  61     }
  62 
  63     public ColorModel getColorModel() {
  64         return ColorModel.getRGBdefault();
  65     }
  66 
  67     public synchronized Raster getRaster(int x, int y, int w, int h) {
  68         WritableRaster t = savedTile;
  69 
  70         if (t == null || w > t.getWidth() || h > t.getHeight()) {
  71             t = getColorModel().createCompatibleWritableRaster(w, h);
  72             IntegerComponentRaster icr = (IntegerComponentRaster) t;
  73             Arrays.fill(icr.getDataStorage(), color);
  74             // Note - markDirty is probably unnecessary since icr is brand new
  75             icr.markDirty();
  76             if (w <= 64 && h <= 64) {
  77                 savedTile = t;
  78             }
  79         }
  80 
  81         return t;
  82     }
  83 }