org.apache.commons.imaging.formats.png.chunks.PngChunkGama Maven / Gradle / Ivy
/*
* 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.png.chunks;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import static org.apache.commons.imaging.common.BinaryFunctions.*;
public class PngChunkGama extends PngChunk {
public final int gamma;
public PngChunkGama(final int length, final int chunkType, final int crc, final byte[] bytes)
throws IOException {
super(length, chunkType, crc, bytes);
final ByteArrayInputStream is = new ByteArrayInputStream(bytes);
gamma = read4Bytes("Gamma", is, "Not a Valid Png File: gAMA Corrupt", getByteOrder());
}
public double getGamma() {
return 1.0 / (gamma / 100000.0);
}
}