| /* |
| * Copyright (c) 2002, 2007, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package sun.java2d; |
| |
| import java.awt.Rectangle; |
| import java.awt.image.Raster; |
| import java.awt.image.ColorModel; |
| import java.awt.GraphicsConfiguration; |
| |
| import sun.java2d.StateTrackable.State; |
| import sun.java2d.loops.SurfaceType; |
| import sun.java2d.pipe.NullPipe; |
| |
| /** |
| * This class provides an empty implementation of the SurfaceData |
| * abstract superclass. All operations on it translate into NOP |
| * or harmless operations. |
| */ |
| public class NullSurfaceData extends SurfaceData { |
| public static final SurfaceData theInstance = new NullSurfaceData(); |
| |
| private NullSurfaceData() { |
| super(State.IMMUTABLE, SurfaceType.Any, ColorModel.getRGBdefault()); |
| } |
| |
| /** |
| * Sets this SurfaceData object to the invalid state. All Graphics |
| * objects must get a new SurfaceData object via the refresh method |
| * and revalidate their pipelines before continuing. |
| */ |
| public void invalidate() { |
| } |
| |
| /** |
| * Return a new SurfaceData object that represents the current state |
| * of the destination that this SurfaceData object describes. |
| * This method is typically called when the SurfaceData is invalidated. |
| */ |
| public SurfaceData getReplacement() { |
| return this; |
| } |
| |
| private final static NullPipe nullpipe = new NullPipe(); |
| |
| public void validatePipe(SunGraphics2D sg2d) { |
| sg2d.drawpipe = nullpipe; |
| sg2d.fillpipe = nullpipe; |
| sg2d.shapepipe = nullpipe; |
| sg2d.textpipe = nullpipe; |
| sg2d.imagepipe = nullpipe; |
| } |
| |
| public GraphicsConfiguration getDeviceConfiguration() { |
| return null; |
| } |
| |
| /** |
| * Return a readable Raster which contains the pixels for the |
| * specified rectangular region of the destination surface. |
| * The coordinate origin of the returned Raster is the same as |
| * the device space origin of the destination surface. |
| * In some cases the returned Raster might also be writeable. |
| * In most cases, the returned Raster might contain more pixels |
| * than requested. |
| * |
| * @see useTightBBoxes |
| */ |
| public Raster getRaster(int x, int y, int w, int h) { |
| throw new InvalidPipeException("should be NOP"); |
| } |
| |
| /** |
| * Does the pixel accessibility of the destination surface |
| * suggest that rendering algorithms might want to take |
| * extra time to calculate a more accurate bounding box for |
| * the operation being performed? |
| * The typical case when this will be true is when a copy of |
| * the pixels has to be made when doing a getRaster. The |
| * fewer pixels copied, the faster the operation will go. |
| * |
| * @see getRaster |
| */ |
| public boolean useTightBBoxes() { |
| return false; |
| } |
| |
| /** |
| * Returns the pixel data for the specified Argb value packed |
| * into an integer for easy storage and conveyance. |
| */ |
| public int pixelFor(int rgb) { |
| return rgb; |
| } |
| |
| /** |
| * Returns the Argb representation for the specified integer value |
| * which is packed in the format of the associated ColorModel. |
| */ |
| public int rgbFor(int pixel) { |
| return pixel; |
| } |
| |
| /** |
| * Returns the bounds of the destination surface. |
| */ |
| public Rectangle getBounds() { |
| return new Rectangle(); |
| } |
| |
| /** |
| * Performs Security Permissions checks to see if a Custom |
| * Composite object should be allowed access to the pixels |
| * of this surface. |
| */ |
| protected void checkCustomComposite() { |
| return; |
| } |
| |
| /** |
| * Performs a copyarea within this surface. Returns |
| * false if there is no algorithm to perform the copyarea |
| * given the current settings of the SunGraphics2D. |
| */ |
| public boolean copyArea(SunGraphics2D sg2d, |
| int x, int y, int w, int h, int dx, int dy) |
| { |
| return true; |
| } |
| |
| /** |
| * Returns destination Image associated with this SurfaceData (null) |
| */ |
| public Object getDestination() { |
| return null; |
| } |
| } |