/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.commons.imaging.formats.tiff.photometricinterpreters;
import java.io.IOException;
import org.apache.commons.imaging.ImageReadException;
import org.apache.commons.imaging.common.ImageBuilder;
public class PhotometricInterpreterPalette extends PhotometricInterpreter {
/**
* The color map of integer ARGB values tied to the pixel index of the
* palette
*/
private final int[] indexColorMap;
public PhotometricInterpreterPalette(final int fSamplesPerPixel,
final int fBitsPerSample[], final int Predictor, final int width, final int height,
final int[] fColorMap) {
super(fSamplesPerPixel, fBitsPerSample, Predictor, width, height);
final int fBitsPerPixel = bitsPerSample[0];
final int colormap_scale = (1 << fBitsPerPixel);
indexColorMap = new int[colormap_scale];
for (int index = 0; index < colormap_scale; index++) {
final int red = (fColorMap[index] >> 8) & 0xff;
final int green = (fColorMap[index + (colormap_scale)] >> 8) & 0xff;
final int blue = (fColorMap[index + (2 * colormap_scale)] >> 8) & 0xff;
indexColorMap[index] = 0xff000000 | (red << 16) | (green << 8)
| blue;
}
}
@Override
public void interpretPixel(final ImageBuilder imageBuilder, final int samples[], final int x,
final int y) throws ImageReadException, IOException {
imageBuilder.setRGB(x, y, indexColorMap[samples[0]]);
}
}