Source for java.awt.CompositeContext

   1: /* Composite.java -- the context for compositing graphics 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.Raster;
  42: import java.awt.image.WritableRaster;
  43: 
  44: /**
  45:  * This interface provides an optimized environment for compositing graphics.
  46:  * Several such contexts may exist for a given <code>Composite</code> object.
  47:  *
  48:  * @author Eric Blake (ebb9@email.byu.edu)
  49:  * @see Composite
  50:  * @since 1.2
  51:  * @status updated to 1.4
  52:  */
  53: public interface CompositeContext
  54: {
  55:   /**
  56:    * Release resources allocated for the compositing.
  57:    */
  58:   void dispose();
  59: 
  60:   /**
  61:    * Compose the two source images into the composite image. The destination
  62:    * can be the same as one of the two inputs, and the destination must be
  63:    * compatible with the ColorModel chosen in {@link Composite#createContext}.
  64:    *
  65:    * @param src the lower image source in compositing
  66:    * @param dstIn the upper image source in compositing
  67:    * @param dstOut the destination for the composite
  68:    * @see Composite
  69:    */
  70:   void compose(Raster src, Raster dstIn, WritableRaster dstOut);
  71: } // interface CompositeContext