ScanExpediterSimple.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.png;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.InputStream;
import org.apache.commons.imaging.ImagingException;
import org.apache.commons.imaging.formats.png.chunks.PngChunkPlte;
import org.apache.commons.imaging.formats.png.transparencyfilters.AbstractTransparencyFilter;
final class ScanExpediterSimple extends AbstractScanExpediter {
ScanExpediterSimple(final int width, final int height, final InputStream is, final BufferedImage bi, final PngColorType pngColorType, final int bitDepth,
final int bitsPerPixel, final PngChunkPlte pngChunkPLTE, final GammaCorrection gammaCorrection,
final AbstractTransparencyFilter abstractTransparencyFilter) {
super(width, height, is, bi, pngColorType, bitDepth, bitsPerPixel, pngChunkPLTE, gammaCorrection, abstractTransparencyFilter);
}
@Override
public void drive() throws ImagingException, IOException {
final int bitsPerScanLine = bitsPerPixel * width;
final int pixelBytesPerScanLine = getBitsToBytesRoundingUp(bitsPerScanLine);
byte[] prev = null;
for (int y = 0; y < height; y++) {
final byte[] unfiltered = getNextScanline(is, pixelBytesPerScanLine, prev, bytesPerPixel);
prev = unfiltered;
final BitParser bitParser = new BitParser(unfiltered, bitsPerPixel, bitDepth);
for (int x = 0; x < width; x++) {
final int rgb = getRgb(bitParser, x);
bi.setRGB(x, y, rgb);
}
}
}
}