org.apache.harmony.x.imageio.plugins.png.PNGImageWriter.java Source code

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Here is the source code for org.apache.harmony.x.imageio.plugins.png.PNGImageWriter.java

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/*
 *  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.
 */
/**
 * @author Viskov Nikolay
 */
package org.apache.harmony.x.imageio.plugins.png;

import net.windward.android.awt.image.BufferedImage;
import net.windward.android.awt.image.RenderedImage;
import net.windward.android.imageio.IIOImage;
import net.windward.android.imageio.ImageTypeSpecifier;
import net.windward.android.imageio.ImageWriteParam;
import net.windward.android.imageio.ImageWriter;
import net.windward.android.imageio.metadata.IIOMetadata;
import net.windward.android.imageio.spi.ImageWriterSpi;
import net.windward.android.imageio.stream.ImageOutputStream;
import org.apache.commons.imaging.ImageFormats;
import org.apache.commons.imaging.ImageWriteException;
import org.apache.commons.imaging.Imaging;
import org.apache.harmony.luni.util.NotImplementedException;
import org.apache.harmony.x.imageio.internal.OutputStreamWrapper;
import org.apache.harmony.x.imageio.internal.nls.Messages;

import java.io.IOException;
import java.io.OutputStream;
import java.util.HashMap;
import java.util.Map;

public class PNGImageWriter extends ImageWriter {
    private static int[][] BAND_OFFSETS = { {}, { 0 }, { 0, 1 }, { 0, 1, 2 }, { 0, 1, 2, 3 } };

    // Each pixel is a grayscale sample.
    private static final int PNG_COLOR_TYPE_GRAY = 0;
    // Each pixel is an R,G,B triple.
    private static final int PNG_COLOR_TYPE_RGB = 2;
    // Each pixel is a palette index, a PLTE chunk must appear.
    private static final int PNG_COLOR_TYPE_PLTE = 3;
    // Each pixel is a grayscale sample, followed by an alpha sample.
    private static final int PNG_COLOR_TYPE_GRAY_ALPHA = 4;
    // Each pixel is an R,G,B triple, followed by an alpha sample.
    private static final int PNG_COLOR_TYPE_RGBA = 6;

    public PNGImageWriter(ImageWriterSpi iwSpi) {
        super(iwSpi);
    }

    @Override
    public IIOMetadata convertStreamMetadata(IIOMetadata arg0, ImageWriteParam arg1)
            throws NotImplementedException {
        // TODO: implement
        throw new NotImplementedException();
    }

    @Override
    public IIOMetadata convertImageMetadata(IIOMetadata arg0, ImageTypeSpecifier arg1, ImageWriteParam arg2)
            throws NotImplementedException {
        // TODO: implement
        throw new NotImplementedException();
    }

    @Override
    public IIOMetadata getDefaultImageMetadata(ImageTypeSpecifier arg0, ImageWriteParam arg1)
            throws NotImplementedException {
        // TODO: implement
        throw new NotImplementedException();
    }

    @Override
    public IIOMetadata getDefaultStreamMetadata(ImageWriteParam arg0) throws NotImplementedException {
        // TODO: implement
        throw new NotImplementedException();
    }

    @Override
    public void write(IIOMetadata streamMetadata, IIOImage iioimage, ImageWriteParam param) throws IOException {
        if (output == null) {
            throw new IllegalStateException(Messages.getString("imageio.81"));
        }
        if (iioimage == null) {
            throw new IllegalArgumentException(Messages.getString("imageio.82"));
        }
        if (iioimage.hasRaster() && !canWriteRasters()) {
            throw new UnsupportedOperationException(Messages.getString("imageio.83"));
        } // ImageOutputStreamImpl

        RenderedImage image = iioimage.getRenderedImage();

        try {
            Map params = new HashMap();
            Imaging.writeImage((BufferedImage) image, wrapOutput(getOutput()), ImageFormats.PNG, params);
        } catch (ImageWriteException e) {
            e.printStackTrace();
        }

    }

    private OutputStream wrapOutput(Object output) {
        if (output instanceof OutputStream) {
            return (OutputStream) output;
        } else if (output instanceof ImageOutputStream) {
            return new OutputStreamWrapper((ImageOutputStream) output);
        } else {
            throw new UnsupportedOperationException(output.getClass().getName());
        }
    }

    public ImageWriteParam getDefaultWriteParam() {
        return new PNGImageWriterParam();
    }
}