gcc/libjava/java/awt/CompositeContext.java

/* Composite.java -- the context for compositing graphics layers
   Copyright (C) 2002, 2005  Free Software Foundation, Inc.

This file is part of GNU Classpath.

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permission to link this library with independent modules to produce an
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package java.awt;

import java.awt.image.Raster;
import java.awt.image.WritableRaster;

/**
 * This interface provides an optimized environment for compositing graphics.
 * Several such contexts may exist for a given <code>Composite</code> object.
 *
 * @author Eric Blake (ebb9@email.byu.edu)
 * @see Composite
 * @since 1.2
 * @status updated to 1.4
 */
public interface CompositeContext
{
  /**
   * Release resources allocated for the compositing.
   */
  void dispose();

  /**
   * Compose the two source images into the composite image. The destination
   * can be the same as one of the two inputs, and the destination must be
   * compatible with the ColorModel chosen in {@link Composite#createContext}.
   *
   * @param src the lower image source in compositing
   * @param dstIn the upper image source in compositing
   * @param dstOut the destination for the composite
   * @see Composite
   */
  void compose(Raster src, Raster dstIn, WritableRaster dstOut);
} // interface CompositeContext