1 /*
   2  * Copyright (c) 2009, 2013, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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   5  * This code is free software; you can redistribute it and/or modify it
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   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
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  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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  23  * questions.
  24  */
  25 
  26 package com.sun.scenario.effect.impl.state;
  27 
  28 public interface LinearConvolvePeer {
  29     /**
  30      * Returns the number of power of 2 scales along the X axis.
  31      * Positive numbers mean to scale the image larger by the indicated
  32      * factors of 2.0.
  33      * Negative numbers mean to scale the image smaller by the indicated
  34      * factors of 0.5.
  35      * Overall the image will be scaled by {@code pow(2.0, getPow2ScaleX())}.
  36      * <p>
  37      * @param kernel the {@code LinearConvolveKernel} instance for the operation.
  38      * @return the power of 2.0 by which to scale the source image along the
  39      *         X axis.
  40      */
  41     public int getPow2ScaleX(LinearConvolveKernel kernel);
  42 
  43     /**
  44      * Returns the number of power of 2 scales along the Y axis.
  45      * Positive numbers mean to scale the image larger by the indicated
  46      * factors of 2.0.
  47      * Negative numbers mean to scale the image smaller by the indicated
  48      * factors of 0.5.
  49      * Overall the image will be scaled by {@code pow(2.0, getPow2ScaleY())}.
  50      * <p>
  51      * @param kernel the {@code LinearConvolveKernel} instance for the operation.
  52      * @return the power of 2.0 by which to scale the source image along the
  53      *         Y axis.
  54      */
  55     public int getPow2ScaleY(LinearConvolveKernel kernel);
  56 }