1 /* Composite.java -- graphics formed from composite layers 2 Copyright (C) 2002, 2005 Free Software Foundation, Inc. 3 4 This file is part of GNU Classpath. 5 6 GNU Classpath is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 2, or (at your option) 9 any later version. 10 11 GNU Classpath is distributed in the hope that it will be useful, but 12 WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with GNU Classpath; see the file COPYING. If not, write to the 18 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 19 02110-1301 USA. 20 21 Linking this library statically or dynamically with other modules is 22 making a combined work based on this library. Thus, the terms and 23 conditions of the GNU General Public License cover the whole 24 combination. 25 26 As a special exception, the copyright holders of this library give you 27 permission to link this library with independent modules to produce an 28 executable, regardless of the license terms of these independent 29 modules, and to copy and distribute the resulting executable under 30 terms of your choice, provided that you also meet, for each linked 31 independent module, the terms and conditions of the license of that 32 module. An independent module is a module which is not derived from 33 or based on this library. If you modify this library, you may extend 34 this exception to your version of the library, but you are not 35 obligated to do so. If you do not wish to do so, delete this 36 exception statement from your version. */ 37 38 39 package java.awt; 40 41 import java.awt.image.ColorModel; 42 43 /** 44 * This interface is for graphics which are formed as composites of others. 45 * It combines {@link Graphics2D} shapes according to defined rules to form 46 * the new image. Implementations of this interface must be immutable, because 47 * they are not cloned when a Graphics2D container is cloned. 48 * 49 * <p>Since this can expose pixels to untrusted code, there is a security 50 * check on custom objects, <code>readDisplayPixels</code>, to prevent leaking 51 * restricted information graphically. 52 * 53 * @author Eric Blake (ebb9@email.byu.edu) 54 * @see AlphaComposite 55 * @see CompositeContext 56 * @see Graphics2D#setComposite(Composite) 57 * @since 1.2 58 * @status updated to 1.4 59 */ 60 public interface Composite 61 { 62 /** 63 * Create a context state for performing the compositing operation. Several 64 * contexts may exist for this object, in a multi-threaded environment. 65 * 66 * @param srcColorModel the color model of the source 67 * @param dstColorModel the color model of the destination 68 * @param hints hints for choosing between rendering alternatives 69 */ createContext(ColorModel srcColorModel, ColorModel dstColorModel, RenderingHints hints)70 CompositeContext createContext(ColorModel srcColorModel, 71 ColorModel dstColorModel, 72 RenderingHints hints); 73 } // interface Composite 74