1 /*
   2  * Copyright (c) 1997, 2007, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package java.awt;
  27 
  28 import java.awt.image.Raster;
  29 import java.awt.image.ColorModel;
  30 
  31 /**
  32  * The <code>PaintContext</code> interface defines the encapsulated
  33  * and optimized environment to generate color patterns in device
  34  * space for fill or stroke operations on a
  35  * {@link Graphics2D}.  The <code>PaintContext</code> provides
  36  * the necessary colors for <code>Graphics2D</code> operations in the
  37  * form of a {@link Raster} associated with a {@link ColorModel}.
  38  * The <code>PaintContext</code> maintains state for a particular paint
  39  * operation.  In a multi-threaded environment, several
  40  * contexts can exist simultaneously for a single {@link Paint} object.
  41  * @see Paint
  42  */
  43 
  44 public interface PaintContext {
  45     /**
  46      * Releases the resources allocated for the operation.
  47      */
  48     public void dispose();
  49 
  50     /**
  51      * Returns the <code>ColorModel</code> of the output.  Note that
  52      * this <code>ColorModel</code> might be different from the hint
  53      * specified in the
  54      * {@link Paint#createContext(ColorModel, Rectangle, Rectangle2D,
  55 AffineTransform, RenderingHints) createContext} method of
  56      * <code>Paint</code>.  Not all <code>PaintContext</code> objects are
  57      * capable of generating color patterns in an arbitrary
  58      * <code>ColorModel</code>.
  59      * @return the <code>ColorModel</code> of the output.
  60      */
  61     ColorModel getColorModel();
  62 
  63     /**
  64      * Returns a <code>Raster</code> containing the colors generated for
  65      * the graphics operation.
  66      * @param x the x coordinate of the area in device space
  67      * for which colors are generated.
  68      * @param y the y coordinate of the area in device space
  69      * for which colors are generated.
  70      * @param w the width of the area in device space
  71      * @param h the height of the area in device space
  72      * @return a <code>Raster</code> representing the specified
  73      * rectangular area and containing the colors generated for
  74      * the graphics operation.
  75      */
  76     Raster getRaster(int x,
  77                      int y,
  78                      int w,
  79                      int h);
  80 
  81 }
--- EOF ---