001/* Composite.java -- the context for compositing graphics layers 002 Copyright (C) 2002, 2005 Free Software Foundation, Inc. 003 004This file is part of GNU Classpath. 005 006GNU Classpath is free software; you can redistribute it and/or modify 007it under the terms of the GNU General Public License as published by 008the Free Software Foundation; either version 2, or (at your option) 009any later version. 010 011GNU Classpath is distributed in the hope that it will be useful, but 012WITHOUT ANY WARRANTY; without even the implied warranty of 013MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 014General Public License for more details. 015 016You should have received a copy of the GNU General Public License 017along with GNU Classpath; see the file COPYING. If not, write to the 018Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 01902110-1301 USA. 020 021Linking this library statically or dynamically with other modules is 022making a combined work based on this library. Thus, the terms and 023conditions of the GNU General Public License cover the whole 024combination. 025 026As a special exception, the copyright holders of this library give you 027permission to link this library with independent modules to produce an 028executable, regardless of the license terms of these independent 029modules, and to copy and distribute the resulting executable under 030terms of your choice, provided that you also meet, for each linked 031independent module, the terms and conditions of the license of that 032module. An independent module is a module which is not derived from 033or based on this library. If you modify this library, you may extend 034this exception to your version of the library, but you are not 035obligated to do so. If you do not wish to do so, delete this 036exception statement from your version. */ 037 038 039package java.awt; 040 041import java.awt.image.Raster; 042import java.awt.image.WritableRaster; 043 044/** 045 * This interface provides an optimized environment for compositing graphics. 046 * Several such contexts may exist for a given <code>Composite</code> object. 047 * 048 * @author Eric Blake (ebb9@email.byu.edu) 049 * @see Composite 050 * @since 1.2 051 * @status updated to 1.4 052 */ 053public interface CompositeContext 054{ 055 /** 056 * Release resources allocated for the compositing. 057 */ 058 void dispose(); 059 060 /** 061 * Compose the two source images into the composite image. The destination 062 * can be the same as one of the two inputs, and the destination must be 063 * compatible with the ColorModel chosen in {@link Composite#createContext}. 064 * 065 * @param src the lower image source in compositing 066 * @param dstIn the upper image source in compositing 067 * @param dstOut the destination for the composite 068 * @see Composite 069 */ 070 void compose(Raster src, Raster dstIn, WritableRaster dstOut); 071} // interface CompositeContext