001/* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 */ 017package org.apache.commons.imaging.formats.tiff.photometricinterpreters; 018 019import java.io.IOException; 020 021import org.apache.commons.imaging.ImageReadException; 022import org.apache.commons.imaging.common.ImageBuilder; 023 024public class PhotometricInterpreterPalette extends PhotometricInterpreter { 025 026 /** 027 * The color map of integer ARGB values tied to the pixel index of the 028 * palette 029 */ 030 private final int[] indexColorMap; 031 032 public PhotometricInterpreterPalette(final int samplesPerPixel, 033 final int[] bitsPerSample, final int predictor, final int width, final int height, 034 final int[] colorMap) { 035 super(samplesPerPixel, bitsPerSample, predictor, width, height); 036 037 final int bitsPerPixel = getBitsPerSample(0); 038 final int colormapScale = (1 << bitsPerPixel); 039 indexColorMap = new int[colormapScale]; 040 for (int index = 0; index < colormapScale; index++) { 041 final int red = (colorMap[index] >> 8) & 0xff; 042 final int green = (colorMap[index + (colormapScale)] >> 8) & 0xff; 043 final int blue = (colorMap[index + (2 * colormapScale)] >> 8) & 0xff; 044 indexColorMap[index] = 0xff000000 | (red << 16) | (green << 8) 045 | blue; 046 } 047 048 } 049 050 @Override 051 public void interpretPixel(final ImageBuilder imageBuilder, final int[] samples, final int x, 052 final int y) throws ImageReadException, IOException { 053 imageBuilder.setRGB(x, y, indexColorMap[samples[0]]); 054 } 055}