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
019/**
020 * A grayscale colormap. Black is 0, white is 1.
021 */
022public class GrayscaleColormap implements Colormap  {
023        
024        public GrayscaleColormap() {
025        }
026
027        /**
028         * Convert a value in the range 0..1 to an RGB color.
029         * @param v a value in the range 0..1
030         * @return an RGB color
031         */
032        public int getColor(float v) {
033                int n = (int)(v*255);
034                if (n < 0)
035                        n = 0;
036                else if (n > 255)
037                        n = 255;
038                return 0xff000000 | (n << 16) | (n << 8) | n;
039        }
040        
041}