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}