AbstractPixelParser.java
/*
* 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.bmp;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Objects;
import org.apache.commons.imaging.ImagingException;
import org.apache.commons.imaging.common.ImageBuilder;
abstract class AbstractPixelParser {
final BmpHeaderInfo bhi;
final byte[] colorTable;
final byte[] imageData;
final InputStream is;
AbstractPixelParser(final BmpHeaderInfo bmpHeaderInfo, final byte[] colorTable, final byte[] imageData) {
this.bhi = Objects.requireNonNull(bmpHeaderInfo, "bmpHeaderInfo");
this.colorTable = colorTable;
this.imageData = Objects.requireNonNull(imageData, "imageData");
is = new ByteArrayInputStream(imageData);
}
int getColorTableRgb(final int index) {
final int actual = index * 4;
final int blue = 0xff & colorTable[actual + 0];
final int green = 0xff & colorTable[actual + 1];
final int red = 0xff & colorTable[actual + 2];
final int alpha = 0xff;
return alpha << 24 | red << 16 | green << 8 | blue << 0;
}
public abstract void processImage(ImageBuilder imageBuilder) throws ImagingException, IOException;
}