Showing the changes to java/pkg/sun/java2d/NullSurfaceData.java (1 of 18352 files). Show all
Unified · Split
| @@ -0,0 +1,159 @@ | |||
| 1 | /* | ||
| 2 | * Copyright (c) 2002, 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 | package sun.java2d; | ||
| 27 | |||
| 28 | import java.awt.Rectangle; | ||
| 29 | import java.awt.image.Raster; | ||
| 30 | import java.awt.image.ColorModel; | ||
| 31 | import java.awt.GraphicsConfiguration; | ||
| 32 | |||
| 33 | import sun.java2d.StateTrackable.State; | ||
| 34 | import sun.java2d.loops.SurfaceType; | ||
| 35 | import sun.java2d.pipe.NullPipe; | ||
| 36 | |||
| 37 | /** | ||
| 38 | * This class provides an empty implementation of the SurfaceData | ||
| 39 | * abstract superclass. All operations on it translate into NOP | ||
| 40 | * or harmless operations. | ||
| 41 | */ | ||
| 42 | public class NullSurfaceData extends SurfaceData { | ||
| 43 | public static final SurfaceData theInstance = new NullSurfaceData(); | ||
| 44 | |||
| 45 | private NullSurfaceData() { | ||
| 46 | super(State.IMMUTABLE, SurfaceType.Any, ColorModel.getRGBdefault()); | ||
| 47 | } | ||
| 48 | |||
| 49 | /** | ||
| 50 | * Sets this SurfaceData object to the invalid state. All Graphics | ||
| 51 | * objects must get a new SurfaceData object via the refresh method | ||
| 52 | * and revalidate their pipelines before continuing. | ||
| 53 | */ | ||
| 54 | public void invalidate() { | ||
| 55 | } | ||
| 56 | |||
| 57 | /** | ||
| 58 | * Return a new SurfaceData object that represents the current state | ||
| 59 | * of the destination that this SurfaceData object describes. | ||
| 60 | * This method is typically called when the SurfaceData is invalidated. | ||
| 61 | */ | ||
| 62 | public SurfaceData getReplacement() { | ||
| 63 | return this; | ||
| 64 | } | ||
| 65 | |||
| 66 | private final static NullPipe nullpipe = new NullPipe(); | ||
| 67 | |||
| 68 | public void validatePipe(SunGraphics2D sg2d) { | ||
| 69 | sg2d.drawpipe = nullpipe; | ||
| 70 | sg2d.fillpipe = nullpipe; | ||
| 71 | sg2d.shapepipe = nullpipe; | ||
| 72 | sg2d.textpipe = nullpipe; | ||
| 73 | sg2d.imagepipe = nullpipe; | ||
| 74 | } | ||
| 75 | |||
| 76 | public GraphicsConfiguration getDeviceConfiguration() { | ||
| 77 | return null; | ||
| 78 | } | ||
| 79 | |||
| 80 | /** | ||
| 81 | * Return a readable Raster which contains the pixels for the | ||
| 82 | * specified rectangular region of the destination surface. | ||
| 83 | * The coordinate origin of the returned Raster is the same as | ||
| 84 | * the device space origin of the destination surface. | ||
| 85 | * In some cases the returned Raster might also be writeable. | ||
| 86 | * In most cases, the returned Raster might contain more pixels | ||
| 87 | * than requested. | ||
| 88 | * | ||
| 89 | * @see useTightBBoxes | ||
| 90 | */ | ||
| 91 | public Raster getRaster(int x, int y, int w, int h) { | ||
| 92 | throw new InvalidPipeException("should be NOP"); | ||
| 93 | } | ||
| 94 | |||
| 95 | /** | ||
| 96 | * Does the pixel accessibility of the destination surface | ||
| 97 | * suggest that rendering algorithms might want to take | ||
| 98 | * extra time to calculate a more accurate bounding box for | ||
| 99 | * the operation being performed? | ||
| 100 | * The typical case when this will be true is when a copy of | ||
| 101 | * the pixels has to be made when doing a getRaster. The | ||
| 102 | * fewer pixels copied, the faster the operation will go. | ||
| 103 | * | ||
| 104 | * @see getRaster | ||
| 105 | */ | ||
| 106 | public boolean useTightBBoxes() { | ||
| 107 | return false; | ||
| 108 | } | ||
| 109 | |||
| 110 | /** | ||
| 111 | * Returns the pixel data for the specified Argb value packed | ||
| 112 | * into an integer for easy storage and conveyance. | ||
| 113 | */ | ||
| 114 | public int pixelFor(int rgb) { | ||
| 115 | return rgb; | ||
| 116 | } | ||
| 117 | |||
| 118 | /** | ||
| 119 | * Returns the Argb representation for the specified integer value | ||
| 120 | * which is packed in the format of the associated ColorModel. | ||
| 121 | */ | ||
| 122 | public int rgbFor(int pixel) { | ||
| 123 | return pixel; | ||
| 124 | } | ||
| 125 | |||
| 126 | /** | ||
| 127 | * Returns the bounds of the destination surface. | ||
| 128 | */ | ||
| 129 | public Rectangle getBounds() { | ||
| 130 | return new Rectangle(); | ||
| 131 | } | ||
| 132 | |||
| 133 | /** | ||
| 134 | * Performs Security Permissions checks to see if a Custom | ||
| 135 | * Composite object should be allowed access to the pixels | ||
| 136 | * of this surface. | ||
| 137 | */ | ||
| 138 | protected void checkCustomComposite() { | ||
| 139 | return; | ||
| 140 | } | ||
| 141 | |||
| 142 | /** | ||
| 143 | * Performs a copyarea within this surface. Returns | ||
| 144 | * false if there is no algorithm to perform the copyarea | ||
| 145 | * given the current settings of the SunGraphics2D. | ||
| 146 | */ | ||
| 147 | public boolean copyArea(SunGraphics2D sg2d, | ||
| 148 | int x, int y, int w, int h, int dx, int dy) | ||
| 149 | { | ||
| 150 | return true; | ||
| 151 | } | ||
| 152 | |||
| 153 | /** | ||
| 154 | * Returns destination Image associated with this SurfaceData (null) | ||
| 155 | */ | ||
| 156 | public Object getDestination() { | ||
| 157 | return null; | ||
| 158 | } | ||
| 159 | } | ||