001/* 002Copyright 2006 Jerry Huxtable 003 004Licensed under the Apache License, Version 2.0 (the "License"); 005you may not use this file except in compliance with the License. 006You may obtain a copy of the License at 007 008 http://www.apache.org/licenses/LICENSE-2.0 009 010Unless required by applicable law or agreed to in writing, software 011distributed under the License is distributed on an "AS IS" BASIS, 012WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013See the License for the specific language governing permissions and 014limitations under the License. 015*/ 016 017package com.jhlabs.image; 018 019import java.awt.*; 020import java.awt.image.*; 021 022/** 023 * A filter which simply multiplies pixel values by a given scale factor. 024 */ 025public class RescaleFilter extends TransferFilter { 026 027 private float scale = 1.0f; 028 029 public RescaleFilter() { 030 } 031 032 public RescaleFilter(float scale) { 033 this.scale = scale; 034 } 035 036 protected float transferFunction( float v ) { 037 return v * scale; 038 } 039 040 /** 041 * Specifies the scale factor. 042 * @param scale the scale factor. 043 * @min-value 1 044 * @max-value 5+ 045 * @see #getScale 046 */ 047 public void setScale(float scale) { 048 this.scale = scale; 049 initialized = false; 050 } 051 052 /** 053 * Returns the scale factor. 054 * @return the scale factor. 055 * @see #setScale 056 */ 057 public float getScale() { 058 return scale; 059 } 060 061 public String toString() { 062 return "Colors/Rescale..."; 063 } 064 065} 066