Home » openjdk-7 » java » awt » [javadoc | source]

    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   }

Home » openjdk-7 » java » awt » [javadoc | source]